0001564590-22-007841 | 10-K | XBRL Viewer

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Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest Income
Interest and Fees on Loans and Leases	$ 398,616	$ 417,498	$ 439,012
Income on Investment Securities
Available-for-Sale	64,550	61,294	62,174
Held-to-Maturity	61,955	66,055	81,616
Deposits	10	14	41
Funds Sold	883	902	3,553
Other	702	661	1,001
Total Interest Income	526,716	546,424	587,397
Interest Expense
Deposits	15,216	32,966	68,374
Securities Sold Under Agreements to Repurchase	13,260	15,281	17,522
Funds Purchased	7	95	840
Short-Term Borrowings		62	38
Other Debt	943	1,698	2,908
Total Interest Expense	29,426	50,102	89,682
Net Interest Income	497,290	496,322	497,715
Provision for Credit Losses	(50,500)	117,800	16,000
Net Interest Income After Provision for Credit Losses	547,790	378,522	481,715
Noninterest Income
Trust and Asset Management	46,068	43,456	44,233
Mortgage Banking	14,964	17,871	13,686
Service Charges on Deposit Accounts	25,564	24,910	30,074
Fees, Exchange, and Other Service Charges	55,457	47,056	57,893
Investment Securities Gains (Losses), Net	(1,297)	9,932	(3,986)
Annuity and Insurance	3,224	3,362	6,934
Bank-Owned Life Insurance	7,784	7,388	7,015
Other	19,589	30,434	27,489
Total Noninterest Income	171,353	184,409	183,338
Noninterest Expense
Salaries and Benefits	228,293	207,329	216,106
Net Occupancy	26,244	39,533	33,800
Net Equipment	35,703	35,448	29,295
Data Processing	20,297	18,499	18,757
Professional Fees	12,895	12,186	10,071
FDIC Insurance	6,536	5,780	5,192
Other	63,621	55,032	66,006
Total Noninterest Expense	393,589	373,807	379,227
Income Before Provision for Income Taxes	325,554	189,124	285,826
Provision for Income Taxes	72,182	35,320	59,913
Net Income	253,372	153,804	225,913
Preferred Stock Dividends	2,975
Net Income Available to Common Shareholders	$ 250,397	$ 153,804	$ 225,913
Basic Earnings Per Common Share	$ 6.29	$ 3.87	$ 5.59
Diluted Earnings Per Common Share	6.25	3.86	5.56
Dividends Declared Per Common Share	$ 2.74	$ 2.68	$ 2.59
Basic Weighted Average Common Shares	39,837,798	39,726,210	40,384,328
Diluted Weighted Average Common Shares	40,053,664	39,892,107	40,649,570

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 253,372	$ 153,804	$ 225,913
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) on Investment Securities	(83,958)	43,428	22,677
Defined Benefit Plans	9,754	(4,494)	(2,746)
Other Comprehensive Income (Loss)	(74,204)	38,934	19,931
Comprehensive Income	$ 179,168	$ 192,738	$ 245,844

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Consolidated Statements of Condition - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Interest-Bearing Deposits in Other Banks	$ 2,571	$ 1,646
Funds Sold	361,536	333,022
Investment Securities
Available-for-Sale	4,276,056	3,791,689
Held-to-Maturity (Fair Value of $4,646,619 and $3,348,693)	4,694,780	3,262,727
Loans Held for Sale	26,746	82,565
Loans and Leases	12,259,076	11,940,020
Allowance for Credit Losses	(157,821)	(216,252)
Net Loans and Leases	12,101,255	11,723,768
Total Earning Assets	21,462,944	19,195,417
Cash and Due From Banks	196,327	279,420
Premises and Equipment, Net	199,393	199,695
Operating Lease Right-of-Use Assets	95,621	99,542
Accrued Interest Receivable	45,242	49,303
Foreclosed Real Estate	2,332	2,332
Mortgage Servicing Rights	22,251	19,652
Goodwill	31,517	31,517
Bank-Owned Life Insurance	344,587	291,480
Other Assets	384,727	435,293
Total Assets	22,784,941	20,603,651
Deposits
Noninterest-Bearing Demand	7,275,287	5,749,612
Interest-Bearing Demand	4,628,567	4,040,733
Savings	7,456,165	6,759,213
Time	1,000,089	1,662,063
Total Deposits	20,360,108	18,211,621
Securities Sold Under Agreements to Repurchase	450,490	600,590
Other Debt	10,391	60,481
Operating Lease Liabilities	103,210	107,412
Retirement Benefits Payable	38,494	51,197
Accrued Interest Payable	2,499	5,117
Taxes Payable and Deferred Taxes	11,901	2,463
Other Liabilities	196,237	190,263
Total Liabilities	21,173,330	19,229,144
Commitments, Contingencies, and Guarantees (Note 20 and Note 23)
Shareholders’ Equity
Preferred Stock ($.01 par value; authorized 180,000 shares; issued and outstanding: December 31, 2021 - 180,000)	180,000
Common Stock ($.01 par value; authorized 500,000,000 shares; issued / outstanding: December 31, 2021 - 58,554,669 / 40,253,193 and December 31, 2020 - 58,285,624 / 40,119,312)	581	580
Capital Surplus	602,508	591,360
Accumulated Other Comprehensive Income (Loss)	(66,382)	7,822
Retained Earnings	1,950,375	1,811,979
Treasury Stock, at Cost (Shares: December 31, 2021 - 18,301,476 and December 31, 2020 - 18,166,312)	(1,055,471)	(1,037,234)
Total Shareholders’ Equity	1,611,611	1,374,507
Total Liabilities and Shareholders’ Equity	$ 22,784,941	$ 20,603,651

Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Held-to-Maturity: Fair Value	$ 4,646,619	$ 3,348,693
Preferred Stock, par value (in dollars per share)	$ 0.01
Preferred Stock, authorized (in shares)	180,000
Preferred Stock, issued (in shares)	180,000
Preferred Stock, outstanding (in shares)	180,000
Common Stock, par value (in dollars per share)	$ 0.01
Common Stock, authorized (in shares)	500,000,000	500,000,000
Common Stock, issued (in shares)	58,554,669	58,285,624
Common Stock, outstanding (in shares)	40,253,193	40,119,312
Treasury Stock (in shares)	18,301,476	18,166,312

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Capital Surplus	Accum. Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2018	$ 1,268,200			$ 577	$ 571,704	$ (51,043)	$ 1,641,314		$ (894,352)
Beginning Balance (in shares) at Dec. 31, 2018				41,499,898
Increase (decrease) in shareholders' equity
Net Income	225,913						225,913
Other Comprehensive Income (Loss)	19,931					19,931
Share-Based Compensation	8,337				8,337
Common Stock Issued under Purchase and Equity Compensation Plans	7,578			$ 2	2,525		(334)		5,385
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				212,924
Common Stock Repurchased	(137,649)								(137,649)
Common Stock Repurchased (in shares)				(1,673,127)
Cash Dividends Declared Common Stock (per share)	(105,478)						(105,478)
Balance at End of Period at Dec. 31, 2019	1,286,832	$ 3,632		$ 579	582,566	(31,112)	1,761,415	$ 3,632	(1,026,616)
Ending Balance (in shares) at Dec. 31, 2019				40,039,695
Increase (decrease) in shareholders' equity
Net Income	153,804						153,804
Other Comprehensive Income (Loss)	$ 38,934					38,934
Accounting Standards Update Extensible List	Accounting Standards Update 2016-13
Share-Based Compensation	$ 7,577				7,577
Common Stock Issued under Purchase and Equity Compensation Plans	9,168			$ 1	1,217		562		7,388
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				283,482
Common Stock Repurchased	(18,006)								(18,006)
Common Stock Repurchased (in shares)				(203,865)
Cash Dividends Declared Common Stock (per share)	(107,434)						(107,434)
Balance at End of Period at Dec. 31, 2020	1,374,507			$ 580	591,360	7,822	1,811,979		(1,037,234)
Ending Balance (in shares) at Dec. 31, 2020				40,119,312
Increase (decrease) in shareholders' equity
Net Income	253,372						253,372
Other Comprehensive Income (Loss)	(74,204)					(74,204)
Share-Based Compensation	13,267				13,267
Preferred Stock Issued, Net	175,487		$ 180,000		(4,513)
Preferred Stock Issued, Net (in shares)			180,000
Common Stock Issued under Purchase and Equity Compensation Plans	14,048			$ 1	2,394		(1,368)		13,021
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				507,121
Common Stock Repurchased	$ (31,258)								(31,258)
Common Stock Repurchased (in shares)	(328,832)			(373,240)
Cash Dividends Declared Common Stock (per share)	$ (110,633)						(110,633)
Cash Dividends Declared Preferred Stock	(2,975)						(2,975)
Balance at End of Period at Dec. 31, 2021	$ 1,611,611		$ 180,000	$ 581	$ 602,508	$ (66,382)	$ 1,950,375		$ (1,055,471)
Ending Balance (in shares) at Dec. 31, 2021			180,000	40,253,193

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividends Declared Per Common Share	$ 2.74	$ 2.68	$ 2.59

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net Income	$ 253,372	$ 153,804	$ 225,913
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	(50,500)	117,800	16,000
Depreciation and Amortization	21,084	20,205	17,268
Amortization of Deferred Loans and Leases (Fees) Costs, Net	(16,728)	(3,197)	476
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	36,488	27,586	20,683
Amortization of Operating Lease Right-of-Use-Assets	11,493	12,281	12,616
Share-Based Compensation	13,267	7,578	8,337
Benefit Plan Contributions	(1,687)	(1,615)	(1,926)
Deferred Income Taxes	3,020	(42,586)	(15,415)
Gains on Sale of Premises and Equipment	(8,655)	(1,850)	(558)
Impairment on Leveraged Lease		2,951
Impairment on ISB Closures and ATMs		4,168
Net Gains on Sales of Loans and Leases	(14,889)	(12,875)	(10,357)
Net (Gains) Losses on Investment Securities	1,297	(9,932)	3,986
Proceeds from Sales of Loans Held for Sale	508,199	394,196	487,436
Originations of Loans Held for Sale	(408,210)	(394,649)	(510,909)
Net Tax Benefits from Share-Based Compensation	1,611	485	727
Net Change in Other Assets and Other Liabilities	27,989	(127,934)	(20,039)
Net Cash Provided by Operating Activities	377,151	146,416	234,238
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities	1,487,043	1,003,432	1,873,700
Purchases	(2,100,693)	(2,114,912)	(1,456,901)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	1,221,585	1,420,853	794,157
Purchases	(2,676,376)	(1,661,180)	(1,380,430)
Net Change in Loans and Leases	(342,767)	(990,169)	(550,533)
Premises and Equipment, Net	(22,372)	(33,287)	(53,900)
Proceeds from Sale of Premises and Equipment	10,246	1,981	639
Net Cash Used in Investing Activities	(2,423,334)	(2,373,282)	(773,268)
Financing Activities
Net Change in Deposits	2,148,487	2,427,147	757,241
Net Change in Short-Term Borrowings	(150,100)	(3,716)	99,811
Proceeds from Other Debt		50,000
Repayments of Other Debt	(50,090)	(75,084)	(50,078)
Proceeds from Issuance of Preferred Stock	175,487
Proceeds from Issuance of Common Stock	13,611	9,389	7,872
Repurchase of Common Stock	(31,258)	(18,006)	(137,649)
Cash Dividends Paid on Common Stock	(110,633)	(107,434)	(105,478)
Cash Dividends Paid on Preferred Stock	(2,975)
Net Cash Provided by Financing Activities	1,992,529	2,282,296	571,719
Net Change in Cash and Cash Equivalents	(53,654)	55,430	32,689
Cash and Cash Equivalents at Beginning of Period	614,088	558,658	525,969
Cash and Cash Equivalents at End of Period	560,434	614,088	558,658
Supplemental Information
Cash Paid for Interest	32,044	53,026	89,894
Cash Paid for Income Taxes	48,764	60,182	58,152
Non-Cash Investing and Financing Activities:
Initial Recognition of Operating Lease Right-of-Use Assets			106,514
Initial Recognition of Operating Lease Liabilities			113,394
Transfer from Loans to Foreclosed Real Estate			$ 2,070
Transfers from Loans to Loans Held for Sale	$ 34,647	$ 32,423

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 1. Summary of Significant Accounting Policies

Basis of Presentation

Bank of Hawaii Corporation (the “Parent”) is a Delaware corporation and a bank holding company headquartered in Honolulu, Hawaii. Bank of Hawaii Corporation and its subsidiaries (collectively, the “Company”) provide a broad range of financial products and services to customers in Hawaii, Guam, and other Pacific Islands. The majority of the Company’s operations consist of customary commercial and consumer banking services including, but not limited to, lending, leasing, deposit services, trust and investment activities, brokerage services, and trade financing.

The accounting and reporting principles of the Company conform to U.S. generally accepted accounting principles (“GAAP”) and prevailing practices within the financial services industry. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results may differ from those estimates and such differences could be material to the financial statements.

Certain prior period information has been reclassified to conform to the current year presentation.

The following is a summary of the Company’s significant accounting policies:

Consolidation

The accompanying consolidated financial statements include the accounts of the Parent and its subsidiaries. The Parent’s principal operating subsidiary is Bank of Hawaii (the “Bank”). All significant intercompany accounts and transactions have been eliminated in consolidation.

Variable Interest Entities

Variable interests are defined as contractual ownership or other interests in an entity that change with fluctuations in an entity’s net asset value. The primary beneficiary consolidates the variable interest entity (“VIE”). The primary beneficiary is defined as the enterprise that has both the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and the obligation to absorb losses or the right to receive benefits that could be significant to the VIE.

The Company has limited partnership interests in several low-income housing partnerships. These partnerships provide funds for the construction and operation of apartment complexes that provide affordable housing to lower-income households. If these developments successfully attract a specified percentage of residents falling in that lower income range, state and/or federal income tax credits are made available to the partners. The tax credits are generally recognized over 10 years for federal and 5 years for state. In order to continue receiving the tax credits each year over the life of the partnership, the low-income residency targets must be maintained.

Prior to January 1, 2015, the Company utilized the effective yield method whereby the Company recognized tax credits generally over 10 years and amortized the initial cost of the investment to provide a constant effective yield over the period that tax credits are allocated to the Company. On January 1, 2015, the Company adopted Accounting Standards Update (“ASU”) No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” prospectively for new investments. ASU No. 2014-01 permits reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. As permitted by ASU No. 2014-01, the Company elected to continue to utilize the effective yield method for investments made prior to January 1, 2015.

Unfunded commitments to fund these low-income housing partnerships were $44.0 million and $53.0 million as of December 31, 2021, and December 31, 2020, respectively. These unfunded commitments are unconditional and legally binding and are recorded in other liabilities in the consolidated statements of condition. See Note 18 Affordable Housing Projects Tax Credit Partnerships for more information.

The Company also has limited partnership interests in solar energy tax credit partnership investments. These partnerships develop, build, own and operate solar renewable energy projects. Over the course of these investments, the Company expects to receive federal and state tax credits, tax-related benefits, and excess cash available for distribution, if any. The Company may be called to sell its interest in the limited partnerships through a call option once all investment tax credits have been recognized. Tax benefits associated with these investments are generally recognized over 6 years.

Although these entities meet the definition of a VIE, the Company is not the primary beneficiary of the entities, as the general partner has both the power to direct the activities that most significantly impact the economic performance of the entities and the obligation to absorb losses or the right to receive benefits that could be significant to the entities. While the partnership agreements allow the limited partners, through a majority vote, to remove the general partner, this right is not deemed to be substantive as the general partner can only be removed for cause.

The investments in these entities are initially recorded at cost, which approximates the maximum exposure to loss as a result of the Company’s involvement with these unconsolidated entities. The balance of the Company’s investments in these entities was $136.6 million and $143.0 million as of December 31, 2021, and December 31, 2020, respectively, and is included in other assets in the consolidated statements of condition.

Investment Securities

Investment securities are accounted for according to their purpose and holding period. Trading securities are those that are bought and held principally for the purpose of selling them in the near term. The Company held no trading securities as of December 31, 2021 or December 31, 2020. Available-for-sale investment securities, comprised of debt and mortgage-backed securities, are those that may be sold before maturity due to changes in the Company’s interest rate risk profile or funding needs, and are reported at fair value with unrealized gains and losses, net of taxes, reported as a component of other comprehensive income. Held-to-maturity investment securities, comprised of debt and mortgage-backed securities, are those that management has the positive intent and ability to hold to maturity and are reported at amortized cost.

Realized gains and losses are recorded in noninterest income and are determined on a trade date basis using the specific identification method. Interest and dividends on investment securities are recognized in interest income on an accrual basis. Premiums and discounts are amortized or accreted into interest income using the interest method over the expected lives of the individual securities.

Transfers of debt securities from the available-for-sale category to the held-to-maturity category are made at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer remains in accumulated other comprehensive income and in the carrying value of the held-to-maturity investment security. Premiums or discounts on investment securities are amortized or accreted as an adjustment of yield using the interest method over the estimated life of the security. Unrealized holding gains or losses that remain in accumulated other comprehensive income are also amortized or accreted over the estimated life of the security as an adjustment of yield, offsetting the related amortization of the premium or accretion of the discount.

Loans Held for Sale

Residential mortgage loans with the intent to be sold in the secondary market are accounted for on an aggregate basis under the fair value option. Fair value is primarily determined based on quoted prices for similar loans in active markets. Non-refundable fees and direct loan origination costs related to residential mortgage loans held for sale are recognized as part of the cost basis of the loan at the time of sale. Gains and losses on sales of residential mortgage loans (sales proceeds minus carrying value) are recorded in the mortgage banking component of noninterest income.

Commercial loans that management has an active plan to sell are valued on an individual basis at the lower-of-cost-or fair value. Fair value is primarily determined based on quoted prices for similar loans in active markets or agreed upon sales prices. Any reduction in the loan’s value, prior to being transferred to the held-for-sale category, is reflected as a charge-off of the recorded investment in the loan resulting in a new cost basis, with a corresponding reduction in the allowance for credit losses (the “Allowance”). Further decreases in the fair value of the loan are recognized in noninterest expense.

Loans and Leases

Loans are reported at the principal amount outstanding, net of unearned income including unamortized deferred loan fees and costs, and cumulative net charge-offs. Interest income is recognized on an accrual basis. Loan origination fees, certain direct costs, and unearned discounts and premiums, if any, are deferred and are generally amortized into interest income as yield adjustments using the interest method over the contractual life of the loan. Loan commitment fees are generally recognized into noninterest income. Other credit-related fees are recognized as fee income, a component of noninterest income, when earned.

The Company’s lease financing arrangements, excluding leveraged leases, primarily consist of equipment and automobile leases. These lease arrangements are classified as sales-type leases despite not receiving a selling profit at lease inception. Sales-type leases are carried at the aggregate of lease payments receivable plus the estimated residual value of leased property, less unearned income. Leveraged leases are carried net of non-recourse debt. Unearned income on sales-type and leveraged leases is amortized over the lease term by methods that approximate the interest method. Residual values on leased assets are periodically reviewed for impairment.

Portfolio segments are defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Management has designated two portfolio segments of loans and leases, commercial and consumer. These portfolio segments are further disaggregated into classes, which represent loans and leases of similar type, risk characteristics, and methods for monitoring and assessing credit risk. The commercial portfolio segment is disaggregated into four classes, commercial and industrial, commercial mortgage, construction, and lease financing. The consumer portfolio segment is also disaggregated into four classes, residential mortgage, home equity, auto, and other (which is comprised of revolving credit, installment, and consumer lease financing arrangements).

Non-Performing Loans and Leases

Generally, all classes of commercial loans and leases are placed on non-accrual status upon becoming contractually past due 90 days as to principal or interest (unless loans and leases are adequately secured by collateral, are in the process of collection, and are reasonably expected to result in repayment), when terms are renegotiated below market levels, or where substantial doubt about full repayment of principal or interest is evident. For residential mortgage and home equity loan classes, loans past due 120 days as to principal or interest may be placed on non-accrual status, and a partial charge-off may be recorded, depending on the collateral value and/or the collectability of the loan. For automobile and other consumer loan classes, the entire outstanding balance of the loan is charged off when the loan becomes 120 days past due as to principal or interest.

When a loan or lease is placed on non-accrual status, the accrued and unpaid interest receivable is reversed and the loan or lease is accounted for on the cash or cost recovery method until qualifying for return to accrual status. All payments received on non-accrual loans and leases are applied against the principal balance of the loan or lease. A loan or lease may be returned to accrual status when all delinquent interest and principal become current in accordance with the terms of the loan or lease agreement and when doubt about repayment is resolved.

Generally, for all classes of loans and leases, a charge-off is recorded when it is probable that a loss has been incurred and when it is possible to determine a reasonable estimate of the loss. For all classes of commercial loans and leases, a charge-off is determined on a judgmental basis after due consideration of the debtor’s prospects for repayment and the fair value of collateral. For the pooled segment of the Company’s commercial and industrial loan class, which consists of small business loans, the entire outstanding balance of the loan remains on accrual status until it is charged off during the month that the loan becomes 120 days past due as to principal or interest. As previously mentioned, for residential mortgage and home equity loan classes, a partial charge-off may be recorded at 120 days past due as to principal or interest depending on the collateral value and/or the collectability of the loan. In the event that a loan or line in the home equity loan class is behind another financial institution’s first mortgage, the entire outstanding balance of the loan is charged off when the loan becomes 120 days past due as to principal or interest, unless the combined loan-to-value ratio is 60% or less. As noted above, loans in the automobile and other consumer loan classes are charged off in its entirety upon the loan becoming 120 days past due as to principal or interest.

Loans Modified in a Troubled Debt Restructuring

Loans are considered to have been modified in a troubled debt restructuring when, due to a borrower’s financial difficulties, the Company makes certain concessions to the borrower that it would not otherwise consider. Modifications may include interest rate reductions, principal or interest forgiveness, forbearance, and other actions intended to minimize economic loss and to avoid foreclosure or repossession of collateral. Generally, a non-accrual loan that has been modified in a troubled debt restructuring remains on non-accrual status for a period of at least 6 months to demonstrate that the borrower is able to meet the terms of the modified loan. However, performance prior to the modification, or significant events that coincide with the modification, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of loan modification or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on non-accrual status.

The Company began offering short-term loan modifications to assist borrowers during the COVID-19 pandemic. If the modification met certain conditions, the modification did not need to be accounted for as a TDR.

Reserve for Credit Losses

The Company’s reserve for credit losses is comprised of the Allowance and the Unfunded Reserve. As of December 31, 2021, the reserve for credit losses also included a reserve for accrued interest receivable related to loans in which interest payment forbearances were granted to borrowers impacted by the COVID-19 pandemic.

Allowance for Credit Losses - Loans and Leases (the “Allowance”)

The current expected credit loss (“CECL”) approach requires an estimate of the credit losses expected over the life of an exposure (or pool of exposures). It replaces the incurred loss approach’s threshold that delayed the recognition of a credit loss until it was probable a loss event was incurred.

The estimate of expected credit losses is based on relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amounts. Historical loss experience is generally the starting point for estimating expected credit losses. The Company then considers whether the historical loss experience should be adjusted for asset-specific risk characteristics or current conditions at the reporting date that did not exist over the historical period used. The Company also considers future economic conditions and portfolio performance as part of a reasonable and supportable forecast period.

As previously mentioned, portfolio segment is defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. The Company has designated two portfolio segments of loans and leases, commercial and consumer. These portfolio segments are further disaggregated into classes, which represent loans and leases of similar type, risk characteristics, and methods for monitoring and assessing credit risk. The commercial portfolio segment is disaggregated into four classes, commercial and industrial, commercial mortgage, construction, and lease financing. The consumer portfolio segment is also disaggregated into four classes, residential mortgage, home equity, auto, and other (which is comprised of revolving credit, installment, and consumer lease financing arrangements). Each commercial and consumer portfolio class is also segmented based on risk characteristics.

Commercial Portfolio Segment

The historical loss experience for the commercial portfolio segment is primarily determined using a Cohort method. This method pools loans into groups (“cohorts”) sharing similar risk characteristics and tracks each cohort’s historical net charge-offs to calculate a historical loss rate. The historical loss rates for each cohort are then averaged to calculate an overall historical loss rate which is applied to current loan balances to arrive at the quantitative baseline portion of the Allowance for most of the commercial portfolio segment.

The Company also considers qualitative adjustments to the quantitative baseline. For example, the Company considers the impact of current environmental factors at the reporting date that did not exist over the period from which historical experience was used. Relevant factors include, but are not limited to, concentrations of credit risk (geographic, large borrower, and industry), economic trends and conditions, changes in underwriting standards, experience and depth of lending staff, trends in delinquencies, and the level of criticized loans.

The Company also incorporates a reasonable and supportable (“R&S”) loss forecast period, which is currently one year, to account for the effect of forecasted economic conditions and other factors on the performance of the commercial portfolio, which could differ from historical loss experience. The Company performs a quarterly asset quality review which includes a review of forecasted gross charge-offs and recoveries, nonperforming assets, criticized loans and leases, and risk rating migration. The asset quality review is reviewed by management and the results are used to consider qualitative adjustments to the quantitative baseline. After the one-year R&S loss forecast period, this adjustment assumes an immediate reversion to historical loss rates for the remaining expected life of the loan.

The Company establishes a specific reserve for individually evaluated loans which do not share similar risk characteristics with the loans included in the quantitative baseline. These individually evaluated loans are removed from the pooling approach discussed above for the quantitative baseline, and include non-accrual loans, troubled debt restructurings (“TDRs”), and other loans as deemed appropriate by management. In addition, the Company individually evaluates “reasonably expected” TDRs, which are identified by the Company as a commercial loan expected to be classified as a TDR within the next six months. Management judgment is utilized to make this determination.

Consumer Portfolio Segment

The historical loss experience for the consumer portfolio segment is primarily determined using a Vintage method. This method measures historical loss behavior in the form of a historical loss rate for homogenous loan pools that originate in the same period, known as a vintage. The historical loss rates are then applied to origination loan balances by vintage to determine the quantitative baseline portion of the Allowance for most of the consumer portfolio segment. The homogenous loan pools are segmented according to similar risk characteristics (e.g., residential mortgage, home equity) and may be sub-segmented further (e.g., geography, lien position) depending on the product.

The Company also considers qualitative adjustments to the quantitative baseline. For example, the Company considers the impact of current environmental factors at the reporting date that did not exist over the period from which historical experience was used. The environmental factors considered for the consumer portfolio are similar to the aforementioned factors considered for the commercial portfolio.

The Company also incorporates a one-year R&S loss forecast period to account for forecasted economic conditions and other factors on the performance of the consumer portfolio which could differ from historical loss experience. The Company performs a quarterly asset quality review designed to estimate gross charge-offs and recoveries for the forecast period. Management evaluates additional factors that may not be reflected in the net charge-off forecast to determine whether a qualitative adjustment is warranted.

The Company has chosen an immediate reversion back to average historical loss rates following the one-year R&S loss forecast period. The reversion method, however, does not reflect the potential for higher losses than pre-pandemic levels due to the impact of COVID-19 beyond the R&S loss forecast period, which the Company has addressed through other qualitative adjustments.

The Company establishes a specific reserve for individually evaluated loans that do not share similar risk characteristics with the loans included in the quantitative baseline. These individually evaluated loans include “reasonably expected” TDRs, identified by the Company as a consumer loan for which a borrower’s application of loan modification due to hardship has been approved by the Company.

See Note 4 Loans and Leases and the Allowance for Credit Losses for more information.

Allowance for Credit Losses - Held-to-Maturity (“HTM”) Debt Securities

The Company’s HTM debt securities are also required to utilize the CECL approach to estimate expected credit losses. Substantially all of the Company’s HTM debt securities are issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Therefore, the Company did not record an allowance for credit losses for these securities.

Allowance for Credit Losses - Available-for-Sale (“AFS”) Debt Securities

The impairment model for available-for-sale (“AFS”) debt securities differs from the CECL approach utilized by HTM debt securities because AFS debt securities are measured at fair value rather than amortized cost. Although ASU No. 2016-13 replaced the legacy other-than-temporary impairment (“OTTI”) model with a credit loss model, it retained the fundamental nature of the legacy OTTI model. One notable change from the legacy OTTI model is when evaluating whether credit loss exists, an entity may no longer consider the length of time fair value has been less than amortized cost. For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either criteria is met, the security’s amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit losses. Losses are charged against the allowance when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. As of December 31, 2021, the Company determined that the unrealized loss positions in AFS securities were not the result of credit losses, and therefore, an allowance for credit losses was not recorded. See Note 3 Investment Securities for more information.

Collateral-Dependent Loans

A financial asset is considered collateral-dependent when the debtor is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. For all classes of loans and leases deemed collateral-dependent, the Company elected the practical expedient to estimate expected credit losses based on the collateral’s fair value less cost to sell. In most cases, the Company records a partial charge-off to reduce the loan’s carrying value to the collateral’s fair value less cost to sell. Substantially all of the collateral consists of various types of real estate including residential properties; commercial properties such as retail centers, office buildings, and lodging; agriculture land; and vacant land.

Reserve for Unfunded Commitments

The Unfunded Reserve represents the expected credit losses on off-balance sheet commitments such as unfunded commitments to extend credit and standby letters of credit. However, a liability is not recognized for commitments unconditionally cancellable by the Company. The Unfunded Reserve is recognized as a liability (other liabilities in the consolidated statements of condition). For the year ended December 31, 2021, the offsetting adjustment to the reserve was recognized in provision for credit losses in the consolidated statements of income. In previous reporting periods, the offsetting provision was recorded in other noninterest expense. The Unfunded Reserve is determined by estimating future draws and applying the expected loss rates on those draws. Future draws are based on historical averages of utilization rates (i.e., the likelihood of draws taken). To estimate future draws on unfunded balances, current utilization rates are compared to historical utilization rates. If current utilization rates are below historical utilization rates, the rate difference is applied to the committed balance to estimate the future draw. Loss rates are estimated by utilizing the same loss rates calculated for the Allowance general reserves. For the commercial portfolio, the historical loss rates were calculated utilizing the Cohort methodology, while the consumer portfolio utilized the Vintage methodology.

Cash and Cash Equivalents

Cash and cash equivalents include cash and due from banks, interest-bearing deposits in other banks, and funds sold. All amounts are readily convertible to cash and have maturities of less than 90 days.

Premises and Equipment

Premises and equipment, including leasehold improvements, are stated at cost, less accumulated depreciation and amortization. Capital leases are included in premises and equipment at the capitalized amount less accumulated amortization.

Premises and equipment are depreciated using the straight-line method over the estimated useful lives of the respective assets. Estimated useful lives generally range up to 30 years for buildings and up to 10 years for equipment. Capitalized leased assets and leasehold improvements are amortized over the shorter of the estimated useful life of the asset or the lease term. Repairs and maintenance are charged to expense as incurred, while improvements which extend the estimated useful life of the asset are capitalized and depreciated over the estimated remaining life of the asset.

Premises and equipment are periodically evaluated for impairment when events or changes in circumstances indicate the carrying amount may not be recoverable. Impairment exists when the expected undiscounted future cash flows of premises and equipment are less than its carrying amount. In that event, the Company records a loss for the difference between the carrying amount and the fair value of the asset based on quoted market prices, if applicable, or a discounted cash flow analysis.

Foreclosed Real Estate

Foreclosed real estate consists of properties acquired through foreclosure proceedings or acceptance of a deed-in-lieu of foreclosure. These properties are recorded at fair value less estimated costs to sell the property. If the recorded investment in the loan exceeds the property’s fair value at the time of acquisition, a charge-off is recorded against the Allowance. If the fair value of the property at the time of acquisition exceeds the carrying amount of the loan, the excess is recorded either as a recovery to the Allowance if a charge-off had previously been recorded, or as a gain on initial transfer in other noninterest income. Subsequent decreases in the property’s fair value and operating expenses of the property are recognized through charges to other noninterest expense. The fair value of the property acquired is based on third party appraisals, broker price opinions, recent sales activity, or a combination thereof, subject to management judgment.

Mortgage Servicing Rights

Mortgage servicing rights are recognized as assets when mortgage loans are sold and the rights to service those loans are retained. Mortgage servicing rights are initially recorded at fair value by using a discounted cash flow model to calculate the present value of estimated future net servicing income.

The Company’s mortgage servicing rights accounted for under the fair value method are carried on the statements of condition at fair value with changes in fair value recorded in mortgage banking income in the period in which the change occurs. Changes in the fair value of mortgage servicing rights are primarily due to changes in valuation inputs, assumptions, and the collection and realization of expected cash flows.

The Company’s mortgage servicing rights accounted for under the amortization method are initially recorded at fair value. However, these mortgage servicing rights are amortized in proportion to and over the period of estimated net servicing income. An impairment analysis is prepared on a quarterly basis by estimating the fair value of the mortgage servicing rights and comparing that value to the carrying amount. A valuation allowance is established when the carrying amount of these mortgage servicing rights exceeds fair value.

Goodwill

Goodwill is initially recorded as the excess of the purchase price over the fair value of the net assets acquired in a business combination and is subsequently evaluated at least annually for impairment. Goodwill impairment testing is performed at the reporting unit level, equivalent to a business segment or one level below. The Company has goodwill assigned to the following reporting unit: Consumer Banking.

The Company performs its annual evaluation of goodwill impairment in the fourth quarter of each year and on an interim basis if events or changes in circumstances indicate that there may be impairment. The Company performs a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The qualitative factors considered include, but are not limited to, macroeconomic and State of Hawaii economic conditions, industry and market conditions and trends, the Company’s financial performance, market capitalization, stock price, and any Company-specific events relevant to the assessment. If the assessment of qualitative factors indicates that it is not more likely than not that an impairment exists, no further testing is performed; otherwise an impairment test is performed. Prior to 2017, the goodwill impairment test was a two-step test. The first step compared the estimated fair value of identified reporting units with their carrying amount, including goodwill. If the estimated fair value of a reporting unit was less than the carrying value, the second step was required to determine the implied fair value of the reporting unit’s goodwill and the amount of goodwill impairment, if any. In 2017, the Company elected to early adopt ASU No. 2017-04, “Simplifying the Test for Goodwill Impairment.” The guidance removed Step 2 of the goodwill impairment test. Goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance remained largely unchanged. Subsequent reversals of goodwill impairment are prohibited. For the year ended December 31, 2021, the Company’s goodwill impairment evaluation, based on its qualitative assessment, indicated there was no impairment.

Non-Marketable Equity Securities

The Company is required to own Federal Home Loan Bank (“FHLB”) of Des Moines and Federal Reserve Bank (“FRB”) stock as a condition of membership. These non-marketable equity securities are accounted for at cost which equals par or redemption value. These securities do not have a readily determinable fair value as their ownership is restricted and there is no market for these securities. These securities can only be redeemed or sold at their par value and only to the respective issuing government supported institution or to another member institution. The Company records these non-marketable equity securities as a component of other assets, which are periodically evaluated for impairment. Management considers these non-marketable equity securities to be long-term investments. Accordingly, when evaluating these securities for impairment, management considers the ultimate recoverability of the par value rather than by recognizing temporary declines in value.

Bank-Owned Life Insurance

The Company purchases life insurance policies on the lives of certain officers and employees and is the owner and beneficiary of the policies. The Company invests in these Bank-Owned Life Insurance (“BOLI”) policies to provide an efficient form of funding for long-term retirement and other employee benefits costs. The Company records these BOLI policies in the consolidated statements of condition at cash surrender value, with changes recorded in noninterest income in the consolidated statements of income.

Securities Sold Under Agreements to Repurchase

The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Company to repurchase the assets. As a result, securities sold under agreements to repurchase are accounted for as collateralized financing arrangements (i.e., secured borrowings) and not as a sale and subsequent repurchase of securities. The obligation to repurchase the securities is reflected as a liability in the Company’s consolidated statements of condition, while the securities underlying the securities sold under agreements to repurchase remain in the respective asset accounts. See Note 19 Securities Sold Under Agreements to Repurchase for more information.

Pension and Postretirement Benefit Plans

The Company incurs certain employment-related expenses associated with its two frozen pension plans and a postretirement benefit plan (the “Plans”). In order to measure the expense associated with the Plans, various assumptions are made including the discount rate, expected return on plan assets, anticipated mortality rates, and expected future healthcare costs. The assumptions are based on historical experience as well as current facts and circumstances. The Company uses a December 31 measurement date for its Plans. As of the measurement date, plan assets are determined based on fair value, generally representing observable market prices. The projected benefit obligation is primarily determined based on the present value of projected benefit distributions at an assumed discount rate.

Net periodic pension benefit costs include interest costs based on an assumed discount rate, the expected return on plan assets based on actuarially derived market-related values, and the amortization of net actuarial gains or losses. Net periodic postretirement benefit costs include service costs, interest costs based on an assumed discount rate, and the amortization of prior service credits and net actuarial gains or losses. The net periodic pension and postretirement benefit costs are recognized in salaries and wages in the consolidated statements of income. Differences between expected and actual results in each year are included in the net actuarial gain or loss amount, which is recognized in other comprehensive income. The net actuarial gain or loss in excess of a 10% corridor is amortized in net periodic benefit cost over the average remaining expected lives of the pension plan participants and over the average remaining future service years of the postretirement benefit plan participants. The prior service credit is amortized over the average remaining service period to full eligibility for participating employees expected to receive benefits.

The Company recognizes in its consolidated statements of condition an asset for a plan’s overfunded status or a liability for a plan’s underfunded status. The Company also measures the Plans’ assets and obligations that determine its funded status as of the end of the year and recognizes those changes in other comprehensive income, net of tax.

Income Taxes

The Parent files a consolidated federal income tax return with the Bank and its subsidiaries. Calculation of the Company’s provision for income taxes requires the interpretation of income tax laws and regulations and the use of estimates and judgments in its determination. The Company is subject to examination by governmental authorities that may give rise to income tax issues due to differing interpretations. Changes to the liability for income taxes also occur due to changes in income tax rates, implementation of new business strategies, resolution of issues with taxing authorities, and newly enacted statutory, judicial, and regulatory guidance.

Deferred income taxes are provided to reflect the tax effect of temporary differences between financial statement carrying amounts and the corresponding tax basis of assets and liabilities. Deferred income taxes are calculated by applying enacted statutory tax rates and tax laws to future years in which temporary differences are expected to reverse. The impact on deferred tax assets and liabilities from a change in tax rates is recognized in income in the period that the tax rate change is enacted. A deferred tax valuation allowance is established if it is more likely than not that a deferred tax asset will not be realized.

The Company’s tax sharing policy provides for the settlement of income taxes between each relevant subsidiary as if the subsidiary had filed a separate return. Payments are made to the Parent by subsidiaries with tax liabilities and subsidiaries that generate tax benefits receive payments for those benefits as used.

The Company maintains reserves for certain tax positions that arise in the normal course of business. As of December 31, 2021, these positions were evaluated based on an assessment of probabilities as to the likelihood of whether a liability had been incurred. Such assessments are reviewed as events occur and adjustments to the reserves are made as appropriate. In evaluating a tax position for recognition, the Company evaluates whether it is more likely than not that a tax position will be sustained upon examination, including resolution of related appeals or litigation processes, based on the technical merits of the position. If the tax position meets the more likely than not recognition threshold, the tax position is measured and recognized in the Company’s Consolidated Financial Statements as the largest amount of tax benefit that, in management’s judgment, is greater than 50% likely of being realized upon ultimate settlement.

Preferred Stock Issuance

On June 15, 2021, the Company issued and sold 7,200,000 depositary shares (the “depositary shares”), each representing a 1/40^th ownership interest in a share of 4.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”). The Series A Preferred Stock has a liquidation preference of $1,000 per share. Net proceeds, after underwriting discounts and expenses, totaled $175.5 million. Dividends on the Series A Preferred Stock are not cumulative and will be paid when declared by the Parent’s Board of Directors to the extent that the Company has legally available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 4.375% per annum. Holders of the Series A Preferred Stock will not have voting rights, except with respect to certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. The Company may redeem the Series A Preferred Stock at its option, (i) in whole or in part, from time to time, on any dividend payment date on or after August 1, 2026 or (ii) in whole but not in part, at any time within 90 days following a regulatory capital treatment event, in either case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share), plus any declared and unpaid dividends.

Treasury Stock

Shares of the Parent’s common stock that are repurchased are recorded in treasury stock at cost. On the date of subsequent re-issuance, the treasury stock account is reduced by the cost of such stock on a first-in, first-out basis.

Earnings Per Common Share

Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding for the period, assuming conversion of all potentially dilutive common stock equivalents.

Derivative Financial Instruments

In the ordinary course of business, the Company enters into derivative financial instruments as an end-user in connection with its risk management activities and to accommodate the needs of its customers. The Company has elected not to qualify for hedge accounting methods addressed under current provisions of GAAP. Derivative financial instruments are stated at fair value on the consolidated statements of condition with changes in fair value reported in current period earnings.

Share-Based Compensation

The Company may grant share-based compensation to employees and non-employee directors in the form of restricted stock and restricted stock units. The fair value of restricted stock is determined based on the closing price of the Parent’s common stock on the date of grant. The Company recognizes compensation expense related to restricted stock on a straight-line basis over the vesting period for service-based awards, plus additional recognition of costs associated with accelerated vesting based on the projected attainment of Company performance measures. Restricted stock units (“RSUs”) are payable solely in cash which are accounted for as other liabilities in the consolidated statements of condition. The fair value of RSUs is initially valued based on the closing price of the Parent’s common stock on the date of grant and is amortized in the statement of income over the vesting period. The RSUs are subsequently remeasured in the same manner described above at the end of each reporting period until settlement.

Advertising Costs

Advertising costs are expensed the first time that advertising takes place. Advertising costs were $9.6 million, $8.3 million, and $6.1 million for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, respectively.

International Operations

The Bank has operations that are conducted in certain Pacific Islands that are denominated in U.S. dollars. These operations are classified as domestic.

Fair Value Measurements

Fair value measurements apply whenever GAAP requires or permits assets or liabilities to be measured at fair value either on a recurring or nonrecurring basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for an asset or liability in an orderly transaction between market participants at the measurement date. Fair value is based on the assumptions that management believes market participants would use when pricing an asset or liability. Fair value measurement and disclosure guidance established a three-level fair value hierarchy that prioritizes the use of inputs used in valuation methodologies. Management maximizes the use of observable inputs and minimizes the use of unobservable inputs when determining fair value measurements. Management reviews and updates the fair value hierarchy classifications of the Company’s assets and liabilities on a quarterly basis. The three-level fair value hierarchy is as follows:

Level 1:	Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available. A contractually binding sales price also provides reliable evidence of fair value.
Level 2:	Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that utilize model-based techniques for which all significant assumptions are observable in the market.
Level 3:	Inputs to the valuation methodology are unobservable and significant to the fair value measurement; inputs to the valuation methodology that utilize model-based techniques for which significant assumptions are not observable in the market; or inputs to the valuation methodology that requires significant management judgment or estimation, some of which may be internally developed.

In some instances, an instrument may fall into multiple levels of the fair value hierarchy. In such instances, the instrument’s level within the fair value hierarchy is based on the lowest of the three levels (with Level 3 being the lowest) that is significant to the fair value measurement. Our assessment of the significance of an input requires judgment and considers factors specific to the instrument.

See Note 14 Employee Benefits and Note 21 Fair Value of Assets and Liabilities for the required fair value measurement disclosures.

Recent Accounting Standards Adopted

The Company adopted ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments” on January 1, 2020, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings, as of January 1, 2020 (i.e., modified retrospective approach). Upon adoption of the standard, the Company recorded a $5.1 million decrease to the reserve for credit losses, which resulted in a $3.6 million after-tax increase to retained earnings as of January 1, 2020. The tax effect resulted in an increase to deferred tax liabilities. This “Day 1” impact of CECL adoption is summarized below:

(dollars in thousands)	December 31, 2019		CECL Adoption Impact			January 1, 2020
Allowance for Credit Losses:
Commercial	$	73,801	$	(18,789	)	$	55,012
Consumer		36,226		17,052			53,278
Total Allowance for Credit Losses		110,027		(1,737	)		108,290
Reserve for Unfunded Commitments		6,822		(3,335	)		3,487
Total Reserve for Credit Losses	$	116,849	$	(5,072	)	$	111,777
Retained Earnings
Total Pre-tax Impact			$	5,072
Tax Effect				(1,440	)
Increase to Retained Earnings			$	3,632

The Company did not record an allowance for AFS or HTM securities on Day 1 as the investment portfolio consists primarily of debt securities explicitly or implicitly backed by the U.S. Government for which credit risk is deemed minimal. The impact going forward will depend on the composition, characteristics, and credit quality of the loan and securities portfolios as well as the economic conditions at future reporting periods. See Note 3 Investment Securities and Note 4 Loans and Leases and the Allowance for Credit Losses for more information.

In December 2019, the FASB issued ASU No. 2019-12, “Simplifying the Accounting for Income Taxes.” This ASU simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. Finally, it clarifies that single-member limited liability companies and similar disregarded entities that are not subject to income tax are not required to recognize an allocation of consolidated income tax expense in their separate financial statements, but they could elect to do so. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020. ASU 2019-12 did not have a material impact on the Company’s Consolidated Financial Statements.

Restrictions on Cash and Cash and Cash Equivalents

12 Months Ended

Dec. 31, 2021

Cash And Cash Equivalents [Abstract]

Restrictions on Cash and Cash and Cash Equivalents

Note 2. Restrictions on Cash and Cash and Cash Equivalents

The Company is required to maintain cash on hand or on deposit with the FRB based on the amount of certain customer deposits, mainly checking accounts. The FRB lowered the reserve requirement ratios on transaction accounts to zero percent effective March 25, 2020, therefore, there were no required reserve balances as of December 31, 2021 and December 31, 2020.

The following table provides a reconciliation of cash and cash equivalents reported within the consolidated statements of condition that sum to the total of the same such amounts shown in the consolidated statements of cash flows:

(dollars in thousands)	December 31, 2021		December 31, 2020
Interest-Bearing Deposits in Other Banks	$	2,571	$	1,646
Funds Sold		361,536		333,022
Cash and Due From Banks		196,327		279,420
Total Cash and Cash Equivalents	$	560,434	$	614,088

Investment Securities

12 Months Ended

Dec. 31, 2021

Investments Debt And Equity Securities [Abstract]

Investment Securities

Note 3. Investment Securities

The amortized cost, gross unrealized gains and losses, and fair value of the Company’s investment securities as of December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
December 31, 2021
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	248,858	$	1,513	$	(284	)	$	250,087
Debt Securities Issued by States and Political Subdivisions		74,743		1,080		(5	)		75,818
Debt Securities Issued by U.S. Government-Sponsored Enterprises		1,758		33		(11	)		1,780
Debt Securities Issued by Corporations		384,590		2,339		(3,816	)		383,113
Mortgage-Backed Securities:
Residential - Government Agencies		1,327,990		9,818		(18,766	)		1,319,042
Residential - U.S. Government-Sponsored Enterprises		2,127,781		4,792		(42,247	)		2,090,326
Commercial - Government Agencies		155,164		1,885		(1,159	)		155,890
Total Mortgage-Backed Securities		3,610,935		16,495		(62,172	)		3,565,258
Total	$	4,320,884	$	21,460	$	(66,288	)	$	4,276,056
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	131,495	$	287	$	(643	)	$	131,139
Debt Securities Issued by Corporations		20,316		76		(249	)		20,143
Mortgage-Backed Securities:
Residential - Government Agencies		1,774,394		12,139		(30,621	)		1,755,912
Residential - U.S. Government-Sponsored Enterprises		2,286,880		15,508		(32,627	)		2,269,761
Commercial - Government Agencies		481,695		324		(12,355	)		469,664
Total Mortgage-Backed Securities		4,542,969		27,971		(75,603	)		4,495,337
Total	$	4,694,780	$	28,334	$	(76,495	)	$	4,646,619
December 31, 2020
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	174,409	$	427	$	(591	)	$	174,245
Debt Securities Issued by States and Political Subdivisions		23,540		1,301		(1	)		24,840
Debt Securities Issued by U.S. Government-Sponsored Enterprises		985		77		—			1,062
Debt Securities Issued by Corporations		220,717		4,844		(956	)		224,605
Mortgage-Backed Securities:
Residential - Government Agencies		1,561,603		33,657		(445	)		1,594,815
Residential - U.S. Government-Sponsored Enterprises		1,497,353		21,254		(324	)		1,518,283
Commercial - Government Agencies		243,029		10,868		(58	)		253,839
Total Mortgage-Backed Securities		3,301,985		65,779		(827	)		3,366,937
Total	$	3,721,636	$	72,428	$	(2,375	)	$	3,791,689
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	7,500	$	8	$	(8	)	$	7,500
Debt Securities Issued by States and Political Subdivisions		33,763		741		—			34,504
Debt Securities Issued by Corporations		12,031		251		—			12,282
Mortgage-Backed Securities:
Residential - Government Agencies		917,459		30,580		(29	)		948,010
Residential - U.S. Government-Sponsored Enterprises		2,099,053		51,735		(291	)		2,150,497
Commercial - Government Agencies		192,921		3,179		(200	)		195,900
Total Mortgage-Backed Securities		3,209,433		85,494		(520	)		3,294,407
Total	$	3,262,727	$	86,494	$	(528	)	$	3,348,693
December 31, 2019
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	222,365	$	213	$	(1,447	)	$	221,131
Debt Securities Issued by States and Political Subdivisions		54,480		631		(14	)		55,097
Debt Securities Issued by U.S. Government-Sponsored Enterprises		22,128		19		—			22,147
Debt Securities Issued by Corporations		335,553		1,401		(633	)		336,321
Mortgage-Backed Securities:
Residential - Government Agencies		1,164,466		11,627		(3,267	)		1,172,826
Residential - U.S. Government-Sponsored Enterprises		584,272		4,363		(1,874	)		586,761
Commercial - Government Agencies		224,372		2,889		(2,541	)		224,720
Total Mortgage-Backed Securities		1,973,110		18,879		(7,682	)		1,984,307
Total	$	2,607,636	$	21,143	$	(9,776	)	$	2,619,003
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	274,375	$	1,319	$	(31	)	$	275,663
Debt Securities Issued by States and Political Subdivisions		54,811		1,236		—			56,047
Debt Securities Issued by Corporations		14,975		—		(138	)		14,837
Mortgage-Backed Securities:
Residential - Government Agencies		1,067,416		13,247		(5,348	)		1,075,315
Residential - U.S. Government-Sponsored Enterprises		1,546,479		13,871		(2,478	)		1,557,872
Commercial - Government Agencies		84,238		317		(1,407	)		83,148
Total Mortgage-Backed Securities		2,698,133		27,435		(9,233	)		2,716,335
Total	$	3,042,294	$	29,990	$	(9,402	)	$	3,062,882

The Company elected to exclude accrued interest receivable (“AIR”) from the amortized cost basis of debt securities disclosed throughout this footnote. For available-for-sale (“AFS”) debt securities, AIR totaled $8.4 million and $6.6 million as of December 31, 2021, and December 31, 2020, respectively. For held-to-maturity (“HTM”) debt securities, AIR totaled $8.2 million and $6.8 million as of December 31, 2021, and December 31, 2020, respectively. AIR is included in the “accrued interest receivable” line item on the Company’s consolidated statements of condition.

The table below presents an analysis of the contractual maturities of the Company’s investment securities as of December 31, 2021. Debt securities issued by government agencies (Small Business Administration securities) and mortgage-backed securities are disclosed separately in the table below as these investment securities may prepay prior to their scheduled contractual maturity dates.

(dollars in thousands)	Amortized Cost		Fair Value
Available-for-Sale:
Due in One Year or Less	$	972	$	978
Due After One Year Through Five Years		214,558		215,275
Due After Five Years Through Ten Years		347,391		345,996
Due After Ten Years		13,130		13,305
		576,051		575,554
Debt Securities Issued by Government Agencies		133,898		135,244
Mortgage-Backed Securities:
Residential - Government Agencies		1,327,990		1,319,042
Residential - U.S. Government-Sponsored Enterprises		2,127,781		2,090,326
Commercial - Government Agencies		155,164		155,890
Total Mortgage-Backed Securities		3,610,935		3,565,258
Total	$	4,320,884	$	4,276,056
Held-to-Maturity:
Due After One Year Through Five Years	$	16,537	$	16,391
Due After Five Years Through Ten Years		123,996		123,862
Due After Ten Years		11,278		11,029
		151,811		151,282
Mortgage-Backed Securities:
Residential - Government Agencies		1,774,394		1,755,912
Residential - U.S. Government-Sponsored Enterprises		2,286,880		2,269,761
Commercial - Government Agencies		481,695		469,664
Total Mortgage-Backed Securities		4,542,969		4,495,337
Total	$	4,694,780	$	4,646,619

Investment securities with carrying values of $2.9 billion and $3.6 billion as of December 31, 2021, and December 31, 2020, respectively, were pledged to secure deposits of governmental entities and securities sold under agreements to repurchase.

The table below presents the gains and losses from the sales of investment securities for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

(dollars in thousands)	2021			2020			2019
Gross Gains on Sales of Investment Securities	$	3,825		$	14,257		$	7,810
Gross Losses on Sales of Investment Securities		(5,122	)		(4,325	)		(11,796	)
Net Gains (Losses) on Sales of Investment Securities	$	(1,297	)	$	9,932		$	(3,986	)

The losses on sales of investment securities during the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were due to fees paid to the counterparties of the Company’s prior Visa Class B share sale transactions, which are expensed as incurred.

The following table summarizes the Company’s AFS debt securities in an unrealized loss position for which an allowance for credit losses has not been recorded, aggregated by major security type and length of time in a continuous unrealized loss position:

	Less Than 12 Months					12 Months or Longer					Total
(dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
December 31, 2021
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	51,455	$	(195	)	$	9,995	$	(89	)	$	61,450	$	(284	)
Debt Securities Issued by States and Political Subdivisions		643		(5	)		—		—			643		(5	)
Debt Securities Issued by U.S. Government- Sponsored Enterprises		814		(10	)		49		(1	)		863		(11	)
Debt Securities Issued by Corporations		249,629		(2,846	)		64,029		(970	)		313,658		(3,816	)
Mortgage-Backed Securities:
Residential - Government Agencies		810,157		(17,131	)		41,471		(1,635	)		851,628		(18,766	)
Residential - U.S. Government-Sponsored Enterprises		1,670,500		(35,711	)		180,205		(6,536	)		1,850,705		(42,247	)
Commercial - Government Agencies		25,664		(223	)		21,810		(936	)		47,474		(1,159	)
Total Mortgage-Backed Securities		2,506,321		(53,065	)		243,486		(9,107	)		2,749,807		(62,172	)
Total	$	2,808,862	$	(56,121	)	$	317,559	$	(10,167	)	$	3,126,421	$	(66,288	)
December 31, 2020 ¹
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	21,338	$	(42	)	$	87,070	$	(549	)	$	108,408	$	(591	)
Debt Securities Issued by States and Political Subdivisions		—		—			26		(1	)		26		(1	)
Debt Securities Issued by Corporations		65,000		(853	)		50,000		(103	)		115,000		(956	)
Mortgage-Backed Securities:
Residential - Government Agencies		113,538		(222	)		28,063		(223	)		141,601		(445	)
Residential - U.S. Government-Sponsored Enterprises		94,002		(324	)		—		—			94,002		(324	)
Commercial - Government Agencies		25,075		(58	)		—		—			25,075		(58	)
Total Mortgage-Backed Securities		232,615		(604	)		28,063		(223	)		260,678		(827	)
Total	$	318,953	$	(1,499	)	$	165,159	$	(876	)	$	484,112	$	(2,375	)

¹ The fair value and gross unrealized losses as of December 31, 2020, have been updated to properly reflect the length of time they were in a continuous unrealized loss position.

The Company does not believe that the AFS debt securities that were in an unrealized loss position as of December 31, 2021, which were comprised of 231 individual securities, represent a credit loss impairment. The gross unrealized loss positions were primarily related to mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Total gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. The Company do not intend to sell the investment securities that were in an unrealized loss position and it is not more likely than not that the Company will be required to sell the investment securities before recovery of their amortized cost basis, which may be at maturity.

Substantially all of the Company’s HTM debt securities are issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Therefore, the Company did not record an allowance for credit losses for these securities as of December 31, 2021.

Interest income from taxable and non-taxable investment securities for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

	Year Ended December 31,
(dollars in thousands)	2021		2020		2019
Taxable	$	125,529	$	125,291	$	137,204
Non-Taxable		976		2,058		6,586
Total Interest Income from Investment Securities	$	126,505	$	127,349	$	143,790

As of December 31, 2021, and December 31, 2020, the carrying value of the Company’s Federal Home Loan Bank of Des Moines (“FHLB Des Moines”) stock and Federal Reserve Bank stock was as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines Stock	$	10,000	$	12,000
Federal Reserve Bank Stock		26,624		21,340
Total	$	36,624	$	33,340

These securities can only be redeemed or sold at their par value and only to the respective issuing government-supported institution or to another member institution. The Company records these non-marketable equity securities as a component of other assets and periodically evaluates these securities for impairment. Management considers these non-marketable equity securities to be long-term investments. Accordingly, when evaluating these securities for impairment, management considers the ultimate recoverability of the par value rather than recognizing temporary declines in value.

Visa Class B Restricted Shares

In 2008, the Company received Visa Class B restricted shares as part of Visa’s initial public offering. These shares are transferable only under limited circumstances until they can be converted into the publicly traded Class A common shares. This conversion will not occur until the settlement of certain litigation which is indemnified by Visa members, including the Company. Visa funded an escrow account from its initial public offering to settle these litigation claims. Should this escrow account not be sufficient to cover these litigation claims, Visa is entitled to fund additional amounts to the escrow account by reducing each member bank’s Class B conversion ratio to unrestricted Class A shares. In December 2021, Visa announced a reduction of the conversion rate from 1.6228 to 1.6181 effective December 29, 2021. See Note 17 Derivative Financial Instruments for more information.

During the second quarter of 2020, the Company sold its remaining 80,214 Visa Class B Shares and recorded a $14.2 million gain on sale. As a result of this sale, the Company no longer owns any Visa Class B shares.

Loans and Leases and the Allowance for Credit Losses

12 Months Ended

Dec. 31, 2021

Loans And Leases And Allowance For Loan And Lease Losses [Abstract]

Loans and Leases and the Allowance for Credit Losses

Note 4. Loans and Leases and the Allowance for Credit Losses

Loans and Leases

The Company’s loan and lease portfolio was comprised of the following as of December 31, 2021, and December 31, 2020:

	December 31,
(dollars in thousands)	2021		2020
Commercial
Commercial and Industrial	$	1,361,921	$	1,357,610
PPP ¹		126,779		517,683
Commercial Mortgage		3,152,130		2,854,829
Construction		220,254		259,798
Lease Financing		105,108		110,766
Total Commercial		4,966,192		5,100,686
Consumer
Residential Mortgage		4,309,602		4,130,513
Home Equity		1,836,588		1,604,538
Automobile		736,565		708,800
Other ²		410,129		395,483
Total Consumer		7,292,884		6,839,334
Total Loans and Leases	$	12,259,076	$	11,940,020

¹	The PPP amounts presented, which are reported net of deferred costs and fees, were previously included as a component of the Commercial and Industrial loan class.

²	Comprised of other revolving credit, installment, and lease financing.

The majority of the Company’s lending activity is with customers located in the State of Hawaii. A substantial portion of the Company’s real estate loans are secured by real estate in Hawaii.

Net gains related to sales of residential mortgage loans, recorded as a component of mortgage banking income, were $7.1 million, $15.4 million, and $5.3 million for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, respectively. Net gains on sales of commercial loans were not material for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

The Company elected to exclude accrued interest receivable from the amortized cost basis of loans disclosed throughout this footnote. As of December 31, 2021, and December 31, 2020, accrued interest receivable for loans totaled $28.7 million and $35.9 million, respectively, and is included in the “accrued interest receivable” line item on the Company’s consolidated statements of condition.

As previously mentioned in Note 1 Summary of Significant Accounting Policies, the CARES Act established the PPP, administered directly by the SBA, which provided loans to small businesses who were affected by economic conditions as a result of the COVID-19 pandemic to provide cash flow assistance to employers who maintain their eligible costs during the COVID-19 emergency. PPP loans carry an interest rate of one percent, and a maturity of two or five years. These loans are fully guaranteed by the SBA and may be eligible for forgiveness by the SBA to the extent that the proceeds are used to cover eligible costs over a period of up to 24 weeks after the loan is made as long as certain conditions are met regarding employee retention and compensation levels. PPP loans deemed eligible for forgiveness by the SBA will be repaid by the SBA to the Company. The SBA paid the Company fees for processing PPP loans. These processing fees are accounted for as loan origination fees and recognized over the contractual loan term as a yield adjustment on the loans.

Allowance for Credit Losses (the “Allowance”)

As previously mentioned in Note 1 Summary of Significant Accounting Policies, the Company’s adoption of ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments,” resulted in a significant change to our methodology for estimating the Allowance from December 31, 2019.

The following presents by portfolio segment, the activity in the Allowance for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

(dollars in thousands)	Commercial			Consumer			Total
For the Year Ended December 31, 2021
Allowance for Credit Losses:
Balance at Beginning of Period	$	84,847		$	131,405		$	216,252
Loans and Leases Charged-Off		(1,117	)		(16,202	)		(17,319	)
Recoveries on Loans and Leases Previously Charged-Off		506			10,848			11,354
Net Loans and Leases Recovered (Charged-Off)		(611	)		(5,354	)		(5,965	)
Provision for Credit Losses		(19,286	)		(33,180	)		(52,466	)
Balance at End of Period	$	64,950		$	92,871		$	157,821

For the Year Ended December 31, 2020
Allowance for Credit Losses:
Balance at Beginning of Period (December 31, 2019)	$	73,801		$	36,226		$	110,027
CECL Adoption (Day 1) Impact		(18,789	)		17,052			(1,737	)
Balance at Beginning of Period (January 1, 2020)		55,012			53,278			108,290
Loans and Leases Charged-Off		(1,697	)		(19,341	)		(21,038	)
Recoveries on Loans and Leases Previously Charged-Off		2,328			11,572			13,900
Net Loans and Leases Recovered (Charged-Off)		631			(7,769	)		(7,138	)
Provision for Credit Losses		29,204			85,896			115,100
Balance at End of Period	$	84,847		$	131,405		$	216,252

For the Year Ended December 31, 2019
Allowance for Credit Losses:
Balance at Beginning of Period	$	66,874		$	39,819		$	106,693
Loans and Leases Charged-Off		(2,738	)		(21,217	)		(23,955	)
Recoveries on Loans and Leases Previously Charged-Off		1,513			9,776			11,289
Net Loans and Leases Recovered (Charged-Off)		(1,225	)		(11,441	)		(12,666	)
Provision for Credit Losses		8,152			7,848			16,000
Balance at End of Period	$	73,801		$	36,226		$	110,027

Credit Quality Indicators

The Company uses several credit quality indicators to manage credit risk in an ongoing manner. The Company uses an internal credit risk rating system that categorizes loans and leases into pass, special mention, or classified categories. Credit risk ratings are applied individually to those classes of loans and leases that have significant or unique credit characteristics that benefit from a case-by-case evaluation. These are typically loans and leases to businesses or individuals in the classes which comprise the commercial portfolio segment. Groups of loans and leases that are underwritten and structured using standardized criteria and characteristics, such as statistical models (e.g., credit scoring or payment performance), are typically risk-rated and monitored collectively. These are typically loans and leases to individuals in the classes which comprise the consumer portfolio segment.

The following are the definitions of the Company’s credit quality indicators:

Pass:

Loans and leases in all classes within the commercial and consumer portfolio segments that are not adversely rated, are contractually current as to principal and interest, and are otherwise in compliance with the contractual terms of the loan or lease agreement. Residential mortgage loans that are past due 90 days or more as to principal or interest may be considered Pass if the current loan-to-value ratio is 60% or less. Home equity loans that are past due 90 days or more as to principal or interest may be considered Pass if: a) the home equity loan is in first lien position and the current loan-to-value ratio is 60% or less; or b) the first mortgage is with the Company and the current combined loan-to-value ratio is 60% or less.

Special Mention:

Loans and leases in all classes within the commercial portfolio segment that have potential weaknesses that deserve management’s close attention. If not addressed, these potential weaknesses may result in deterioration of the repayment prospects for the loan or lease. The Special Mention credit quality indicator is not used for the consumer portfolio segment.

Classified:

Loans and leases in the classes within the commercial portfolio segment that are inadequately protected by the sound worth and paying capacity of the borrower or of the collateral pledged, if any. Classified loans and leases are also those in the classes within the consumer portfolio segment that are past due 90 days or more as to principal or interest. Residential mortgage and home equity loans may be current as to principal and interest, but may be considered Classified for a period of generally up to six months following a loan modification. Following a period of demonstrated performance in accordance with the modified contractual terms, the loan may be removed from Classified status.

For Pass rated credits in the commercial portfolio, most risk ratings are certified at a minimum annually. For Special Mention or Classified Credits, risk ratings are reviewed for appropriateness on an ongoing basis, monthly, or at a minimum, quarterly. The following presents by credit quality indicator, loan class, and year of origination, the amortized cost basis of the Company’s loans and leases as of December 31, 2021.

		Term Loans by Origination Year
(dollars in thousands)	2021			2020		2019		2018		2017		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total Loans and Leases
December 31, 2021
Commercial
Commercial and Industrial
Pass		$	455,984	$	301,646	$	79,826	$	68,026	$	27,246	$	75,321	$	256,240	$	471	$	1,264,760
Special Mention			1,966		32,667		-		-		-		101		27,031		-		61,765
Classified			10,851		1,919		87		1,990		505		17,481		2,509		54		35,396
Total Commercial and Industrial		$	468,801	$	336,232	$	79,913	$	70,016	$	27,751	$	92,903	$	285,780	$	525	$	1,361,921
PPP
Pass		$	86,484	$	40,295	$	-	$	-	$	-	$	-	$	-	$	-	$	126,779
Total PPP		$	86,484	$	40,295	$	-	$	-	$	-	$	-	$	-	$	-	$	126,779
Commercial Mortgage
Pass		$	958,719	$	736,155	$	338,160	$	261,991	$	178,436	$	459,337	$	53,386	$	-	$	2,986,184
Special Mention			68,768		39,773		-		30,000		-		6,069		-		-		144,610
Classified			3,740		7,815		640		-		-		9,141		-		-		21,336
Total Commercial Mortgage		$	1,031,227	$	783,743	$	338,800	$	291,991	$	178,436	$	474,547	$	53,386	$	-	$	3,152,130
Construction
Pass		$	67,069	$	94,878	$	40,051	$	-	$	596	$	-	$	17,660	$	-	$	220,254
Total Construction		$	67,069	$	94,878	$	40,051	$	-	$	596	$	-	$	17,660	$	-	$	220,254
Lease Financing
Pass		$	21,637	$	15,075	$	15,697	$	9,902	$	2,004	$	39,937	$	-	$	-	$	104,252
Classified			-		-		-		856		-		-		-		-		856
Total Lease Financing		$	21,637	$	15,075	$	15,697	$	10,758	$	2,004	$	39,937	$	-	$	-	$	105,108
Total Commercial		$	1,675,218	$	1,270,223	$	474,461	$	372,765	$	208,787	$	607,387	$	356,826	$	525	$	4,966,192
Consumer
Residential Mortgage
Pass		$	1,392,337	$	1,131,330	$	367,525	$	177,215	$	255,451	$	982,306	$	-	$	-	$	4,306,164
Classified			-		-		294		-		2,279		865		-		-		3,438
Total Residential Mortgage		$	1,392,337	$	1,131,330	$	367,819	$	177,215	$	257,730	$	983,171	$	-	$	-	$	4,309,602
Home Equity
Pass		$	-	$	-	$	-	$	-	$	-	$	2,934	$	1,793,142	$	35,141	$	1,831,217
Classified			-		-		-		-		-		110		4,614		647		5,371
Total Home Equity		$	-	$	-	$	-	$	-	$	-	$	3,044	$	1,797,756	$	35,788	$	1,836,588
Automobile
Pass		$	301,285	$	152,022	$	138,887	$	91,411	$	33,268	$	18,963	$	-	$	-	$	735,836
Classified			165		85		134		137		120		88		-		-		729
Total Automobile		$	301,450	$	152,107	$	139,021	$	91,548	$	33,388	$	19,051	$	-	$	-	$	736,565
Other¹
Pass		$	172,735	$	49,769	$	92,983	$	44,489	$	16,218	$	6,444	$	25,622	$	1,444	$	409,704
Classified			39		90		183		47		27		17		22		-		425
Total Other		$	172,774	$	49,859	$	93,166	$	44,536	$	16,245	$	6,461	$	25,644	$	1,444	$	410,129
Total Consumer		$	1,866,561	$	1,333,296	$	600,006	$	313,299	$	307,363	$	1,011,727	$	1,823,400	$	37,232	$	7,292,884
Total Loans and Leases		$	3,541,779	$	2,603,519	$	1,074,467	$	686,064	$	516,150	$	1,619,114	$	2,180,226	$	37,757	$	12,259,076

¹	Comprised of other revolving credit, installment, and lease financing.

For the year ended December 31, 2021, $4.1 million in revolving loans were converted to term loans.

The following presents by credit quality indicator, loan class, and year of origination, the amortized cost basis of the Company’s loans and leases as of December 31, 2020.

		Term Loans by Origination Year
(dollars in thousands)	2020			2019		2018		2017		2016		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total Loans and Leases
December 31, 2020 ²
Commercial
Commercial and Industrial
Pass		$	426,780	$	149,024	$	149,468	$	49,385	$	52,354	$	68,269	$	342,339	$	847	$	1,238,466
Special Mention			11,702		42		-		-		110		95		32,319		52		44,320
Classified			32,208		1,734		2,266		777		19		19,166		18,529		125		74,824
Total Commercial and Industrial		$	470,690	$	150,800	$	151,734	$	50,162	$	52,483	$	87,530	$	393,187	$	1,024	$	1,357,610
PPP
Pass		$	517,683	$	-	$	-	$	-	$	-	$	-	$	-	$	-	$	517,683
Total PPP		$	517,683	$	-	$	-	$	-	$	-	$	-	$	-	$	-	$	517,683
Commercial Mortgage
Pass		$	847,676	$	458,472	$	350,363	$	245,157	$	267,860	$	425,157	$	76,869	$	-	$	2,671,554
Special Mention			66,523		28,418		291		7,117		8,665		5,035		-		-		116,049
Classified			49,640		655		2,783		274		4,742		9,132		-		-		67,226
Total Commercial Mortgage		$	963,839	$	487,545	$	353,437	$	252,548	$	281,267	$	439,324	$	76,869	$	-	$	2,854,829
Construction
Pass		$	106,508	$	105,731	$	11,275	$	8,133	$	-	$	-	$	28,151	$	-	$	259,798
Total Construction		$	106,508	$	105,731	$	11,275	$	8,133	$	-	$	-	$	28,151	$	-	$	259,798
Lease Financing
Pass		$	19,906	$	20,132	$	13,785	$	4,202	$	9,657	$	41,755	$	-	$	-	$	109,437
Classified			33		67		1,092		42		95		-		-		-		1,329
Total Lease Financing		$	19,939	$	20,199	$	14,877	$	4,244	$	9,752	$	41,755	$	-	$	-	$	110,766
Total Commercial		$	2,078,659	$	764,275	$	531,323	$	315,087	$	343,502	$	568,609	$	498,207	$	1,024	$	5,100,686
Consumer
Residential Mortgage
Pass		$	1,300,831	$	576,452	$	295,522	$	454,165	$	545,798	$	954,120	$	-	$	-	$	4,126,888
Classified			-		294		-		1,032		-		2,299		-		-		3,625
Total Residential Mortgage		$	1,300,831	$	576,746	$	295,522	$	455,197	$	545,798	$	956,419	$	-	$	-	$	4,130,513
Home Equity
Pass		$	-	$	-	$	-	$	-	$	-	$	4,449	$	1,556,671	$	37,559	$	1,598,679
Classified			-		-		-		-		-		88		4,693		1,078		5,859
Total Home Equity		$	-	$	-	$	-	$	-	$	-	$	4,537	$	1,561,364	$	38,637	$	1,604,538
Automobile
Pass		$	219,218	$	213,914	$	158,216	$	68,776	$	33,899	$	13,850	$	-	$	-	$	707,873
Classified			101		245		171		113		161		136		-		-		927
Total Automobile		$	219,319	$	214,159	$	158,387	$	68,889	$	34,060	$	13,986	$	-	$	-	$	708,800
Other¹
Pass		$	71,042	$	145,549	$	92,993	$	39,770	$	9,225	$	2,189	$	32,070	$	1,485	$	394,323
Classified			51		419		375		167		42		21		85		-		1,160
Total Other		$	71,093	$	145,968	$	93,368	$	39,937	$	9,267	$	2,210	$	32,155	$	1,485	$	395,483
Total Consumer		$	1,591,243	$	936,873	$	547,277	$	564,023	$	589,125	$	977,152	$	1,593,519	$	40,122	$	6,839,334
Total Loans and Leases		$	3,669,902	$	1,701,148	$	1,078,600	$	879,110	$	932,627	$	1,545,761	$	2,091,726	$	41,146	$	11,940,020

¹	Comprised of other revolving credit, installment, and lease financing.

²	Certain prior period information has been reclassified to conform to current presentations.

For the year ended December 31, 2020, $2.9 million in revolving loans were converted to term loans.

Aging Analysis

Loans and leases are considered to be past due once becoming 30 days delinquent. For the consumer portfolio, this generally represents two missed monthly payments. The following presents by class, an aging analysis of the Company’s loan and lease portfolio as of December 31, 2021, and December 31, 2020.

(dollars in thousands)	30 - 59 Days Past Due		60 - 89 Days Past Due		Past Due 90 Days or More		Non- Accrual		Total Past Due and Non- Accrual		Current		Total Loans and Leases		Non- Accrual Loans and Leases that are Current ²
As of December 31, 2021
Commercial
Commercial and Industrial	$	2,006	$	14	$	—	$	243	$	2,263	$	1,359,658	$	1,361,921	$	151
PPP		—		—		—		—		—		126,779		126,779		—
Commercial Mortgage		—		—		—		8,205		8,205		3,143,925		3,152,130		8,205
Construction		—		—		—		—		—		220,254		220,254		—
Lease Financing		—		—		—		—		—		105,108		105,108		—
Total Commercial		2,006		14		—		8,448		10,468		4,955,724		4,966,192		8,356
Consumer
Residential Mortgage		2,046		1,263		3,159		3,305		9,773		4,299,829		4,309,602		—
Home Equity		1,791		748		3,456		4,881		10,876		1,825,712		1,836,588		1,544
Automobile		7,804		1,495		729		—		10,028		726,537		736,565		—
Other ¹		2,686		904		426		—		4,016		406,113		410,129		—
Total Consumer		14,327		4,410		7,770		8,186		34,693		7,258,191		7,292,884		1,544
Total	$	16,333	$	4,424	$	7,770	$	16,634	$	45,161	$	12,213,915	$	12,259,076	$	9,900

As of December 31, 2020
Commercial
Commercial and Industrial	$	191	$	59	$	—	$	441	$	691	$	1,356,919	$	1,357,610	$	285
PPP		—		—		—		—		—		517,683		517,683		—
Commercial Mortgage		—		—		—		8,527		8,527		2,846,302		2,854,829		4,983
Construction		—		—		—		—		—		259,798		259,798		—
Lease Financing		—		—		—		—		—		110,766		110,766		—
Total Commercial		191		59		—		8,968		9,218		5,091,468		5,100,686		5,268
Consumer
Residential Mortgage		4,049		2,083		5,274		3,223		14,629		4,115,884		4,130,513		2,100
Home Equity		3,423		3,378		3,187		3,958		13,946		1,590,592		1,604,538		987
Automobile		6,358		2,215		925		—		9,498		699,302		708,800		—
Other ¹		2,556		1,612		1,160		—		5,328		390,155		395,483		—
Total Consumer		16,386		9,288		10,546		7,181		43,401		6,795,933		6,839,334		3,087
Total	$	16,577	$	9,347	$	10,546	$	16,149	$	52,619	$	11,887,401	$	11,940,020	$	8,355

¹	Comprised of other revolving credit, installment, and lease financing.

²	Represents non-accrual loans that are not past due 30 days or more; however, full payment of principal and interest as originally structured is still not expected.

Non-Accrual Loans and Leases

The following presents the non-accrual loans and leases as of December 31, 2021, and December 31, 2020.

	December 31, 2021						December 31, 2020
(dollars in thousands)	Non-accrual loans with a specific ACL		Non-accrual loans without a specific ACL		Total Non-accrual loans		Total Non-accrual loans
Commercial
Commercial and Industrial	$	243	$	—	$	243	$	441
Commercial Mortgage		4,661		3,544		8,205		8,527
Total Commercial		4,904		3,544		8,448		8,968
Consumer
Residential Mortgage		2,959		346		3,305		3,223
Home Equity		4,881		—		4,881		3,958
Total Consumer		7,840		346		8,186		7,181
Total	$	12,744	$	3,890	$	16,634	$	16,149

All payments received while on non-accrual status are applied against the principal balance of the loan or lease. The Company does not recognize interest income while loans or leases are on non-accrual status.

Modifications

A modification of a loan constitutes a troubled debt restructuring (“TDR”) when the Company for economic or legal reasons related to a borrower’s financial difficulties grants a concession to the borrower that it would not otherwise consider. Loans modified in a TDR were $70.0 million and $72.5 million as of December 31, 2021, and December 31, 2020, respectively. As of December 31, 2021, there were $0.2 million in commitments to lend additional funds on loans modified in a TDR. As of December 31, 2020, there were $0.5 million in commitments to lend additional funds on loans modified in a TDR.

Loans modified in a TDR may already be on non-accrual status and partial charge-offs have in some cases already been taken against the outstanding loan balance. As a result, loans modified in a TDR may have the financial effect of reducing the specific Allowance associated with the loan because the potential loss has been recognized. An Allowance for impaired commercial and consumer loans that have been modified in a TDR is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the estimated fair value of the collateral, less any selling costs, if the loan is collateral dependent. Management exercises significant judgment in developing these estimates.

The following presents by class, information related to loans modified in a TDR during the years ended December 31, 2021, and December 31, 2020.

	Loans Modified as a TDR for the Year Ended December 31, 2021						Loans Modified as a TDR for the Year Ended December 31, 2020
Troubled Debt Restructurings (dollars in thousands)	Number of Contracts		Recorded Investment (as of period end) ¹		Increase in Allowance (as of period end)		Number of Contracts		Recorded Investment (as of period end) ¹		Increase in Allowance (as of period end)
Commercial
Commercial and Industrial		7	$	251	$	4		5	$	203	$	5
Commercial Mortgage		—		—		—		1		1,046		60
Total Commercial		7		251		4		6		1,249		65
Consumer
Residential Mortgage		15		5,889		612		—		—		—
Home Equity		11		1,793		85		10		1,246		8
Automobile		341		7,130		95		352		7,541		112
Other ²		132		1,160		42		180		1,850		77
Total Consumer		499		15,972		834		542		10,637		197
Total		506	$	16,223	$	838		548	$	11,886	$	262

¹	The period end balances reflect all partial paydowns and charge-offs since the modification date. TDRs fully paid off, charged off, or foreclosed upon by period end are not included.

²	Comprised of other revolving credit and installment financing.

The following presents by class, loans modified in a TDR that defaulted during the year ended December 31, 2021, and December 31, 2020, and within twelve months of their modification date. A TDR is considered to be in default once it becomes 60 days or more past due following a modification.

	Year Ended December 31, 2021				Year Ended December 31, 2020
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date (dollars in thousands)	Number of Contracts		Recorded Investment (as of period end)¹		Number of Contracts		Recorded Investment (as of period end) ¹
Commercial
Commercial and Industrial		—	$	—		1	$	27
Total Commercial		—		—		1		27
Consumer
Residential Mortgage		1		521		—		—
Home Equity		4		407		—		—
Automobile		38		644		43		723
Other ²		29		189		10		81
Total Consumer		72		1,761		53		804
Total		72	$	1,761		54	$	831

¹	The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid off, charged off, or foreclosed upon by period end are not included.

²	Comprised of other revolving credit and installment financing.

Loans modified in a TDR are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a TDR subsequently default, the Company evaluates the loan for possible further impairment. The specific Allowance associated with the loan may be increased, adjustments may be made in the allocation of the Allowance, or partial charge-offs may be taken to further write-down the carrying value of the loan.

Modifications Made in Response to COVID-19

The Company offered short-term loan modifications to assist borrowers during the COVID-19 pandemic. These modifications generally involved principal and/or interest payment deferrals for up to six months. As the COVID-19 pandemic persisted in negatively impacting the economy, the Company continued to offer additional loan modifications to borrowers struggling as a result of the COVID-19 pandemic. Similar to the initial modifications granted, the additional round of loan modifications generally involved principal and/or interest payment deferrals for up to an additional six months for commercial and consumer loans, and principal-only deferrals for up to an additional 12 months for selected commercial loans. The Company generally continued to accrue and recognize interest income during the forbearance period. The Company offers several repayment options such as immediate repayment, repayment over a designated time period or as a balloon payment at maturity, or by extending the loan term. These modifications generally did not involve forgiveness or interest rate reductions. The CARES Act, along with a joint agency statement issued by banking agencies, provided that modifications made in response to the COVID-19 pandemic to borrowers who qualify are not required to be accounted for as a TDR. Accordingly, the Company does not account for such qualifying modifications as TDRs. See Note 1 Summary of Significant Accounting Policies for more information.

The Company, as lessor, also granted short-term lease concessions on some of its sales-type finance leases for equipment and automobiles. The concessions primarily consisted of six-month extension programs whereby lease payments currently due are deferred and shifted to the end of the lease term. Interest income continued to accrue during the deferral period. Additional round of lease concessions were not material. See Note 1 Summary of Significant Accounting Policies for more information.

As of December 31, 2021, these COVID-19 related loan and lease modifications totaled $40.5 million (8 loans and leases) for the commercial segment and $3.1 million (11 loans and leases) for the consumer segment.

Foreclosure Proceedings

Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure totaled $1.5 million as of December 31, 2021.

Mortgage Servicing Rights

12 Months Ended

Dec. 31, 2021

Transfers And Servicing Of Financial Assets [Abstract]

Mortgage Servicing Rights

Note 5. Mortgage Servicing Rights

The Company’s portfolio of residential mortgage loans serviced for third parties was $2.7 billion as of December 31, 2021, and $2.8 billion as of December 31, 2020. Substantially all of these loans were originated by the Company and sold to third parties on a non-recourse basis with servicing rights retained. These retained servicing rights are recorded as a servicing asset and are initially recorded at fair value (see Note 21 Fair Value of Assets and Liabilities for more information). Changes to the balance of mortgage servicing rights are recorded in mortgage banking income in the Company’s consolidated statements of income.

The Company’s mortgage servicing activities include collecting principal, interest, and escrow payments from borrowers; making tax and insurance payments on behalf of borrowers; monitoring delinquencies and executing foreclosure proceedings; and accounting for and remitting principal and interest payments to investors. Servicing income, including late and ancillary fees, was $6.4 million for the year ended December 31, 2021, $7.2 million for the year ended December 31, 2020, and $7.3 million for the year ended December 31, 2019. Servicing income is recorded in mortgage banking income in the Company’s consolidated statements of income. The Company’s residential mortgage investor loan servicing portfolio is primarily comprised of fixed rate loans concentrated in Hawaii.

For the years ended December 31, 2021, December 31, 2020, and December 31, 2019, the change in the fair value of the Company’s mortgage servicing rights accounted for under the fair value measurement method was as follows:

(dollars in thousands)	2021			2020			2019
Balance at Beginning of Year	$	958		$	1,126		$	1,290
Changes in Fair Value Due to Payoffs		(158	)		(168	)		(164	)
Balance at End of Year	$	800		$	958		$	1,126

For the years ended December 31, 2021, December 31, 2020, and December 31, 2019, the change in the carrying value of the Company’s mortgage servicing rights accounted for under the amortization method was as follows:

(dollars in thousands)	2021			2020			2019
Balance at Beginning of Year	$	18,694		$	23,896		$	23,020
Servicing Rights that Resulted From Asset Transfers		4,921			3,592			4,485
Amortization		(4,227	)		(4,902	)		(3,609	)
Valuation Allowance Recovery (Provision)		2,063			(3,892	)		—
Balance at End of Year	$	21,451		$	18,694		$	23,896
Valuation Allowance:
Balance at Beginning of Year	$	(3,892	)	$	—		$	—
Valuation Allowance Recovery (Provision)		2,063			(3,892	)		—
Balance at End of Year	$	(1,829	)	$	(3,892	)	$	—
Fair Value:
Balance at Beginning of Year	$	18,694		$	25,714		$	29,218
Balance at End of Year	$	21,451		$	18,694		$	25,714

The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of December 31, 2021, and December 31, 2020 were as follows:

	December 31,
	2021			2020
Weighted-Average Constant Prepayment Rate ¹		10.70	%	14.42		%
Weighted-Average Life (in years)		6.18			4.99
Weighted-Average Note Rate	3.62		%	3.87		%
Weighted-Average Discount Rate ²	7.04		%	5.81		%

¹	Represents annualized loan prepayment rate assumption.

²	Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities.

A sensitivity analysis of the Company’s fair value of mortgage servicing rights to changes in certain key assumptions as of December 31, 2021, and December 31, 2020, is presented in the following table.

	December 31,
(dollars in thousands)	2021			2020
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$	(252	)	$	(203	)
Decrease in fair value from 50 bps adverse change		(498	)		(401	)
Discount Rate
Decrease in fair value from 25 bps adverse change		(223	)		(184	)
Decrease in fair value from 50 bps adverse change		(441	)		(365	)

This analysis generally cannot be extrapolated because the relationship of a change in one key assumption to the change in the fair value of the Company’s mortgage servicing rights usually is not linear. Also, the effect of changing one key assumption without changing other assumptions is not realistic.

- Definition

The entire disclosure for a transferor's continuing involvement in financial assets that it has transferred in a securitization or asset-backed financing arrangement, the nature of any restrictions on assets reported by an entity in its statement of financial position that relate to a transferred financial asset (including the carrying amounts of such assets), how servicing assets and servicing liabilities are reported, and (for securitization or asset-backed financing arrangements accounted for as sales) when a transferor has continuing involvement with the transferred financial assets and transfers of financial assets accounted for as secured borrowings, how the transfer of financial assets affects an entity's financial position, financial performance, and cash flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Premises and Equipment

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Premises and Equipment

Note 6. Premises and Equipment

The components of the Company’s premises and equipment as of December 31, 2021, and December 31, 2020, were as follows:

(dollars in thousands)	Cost		Accumulated Depreciation and Amortization			Net Book Value
December 31, 2021
Premises	$	366,205	$	(226,515	)	$	139,690
Equipment		145,120		(87,649	)		57,471
Finance Leases		6,593		(4,361	)		2,232
Total	$	517,918	$	(318,525	)	$	199,393

December 31, 2020
Premises	$	370,268	$	(237,024	)	$	133,244
Equipment		143,964		(79,817	)		64,147
Finance Leases		6,593		(4,289	)		2,304
Total	$	520,825	$	(321,130	)	$	199,695

Depreciation and amortization (including finance lease amortization) included in noninterest expense was $21.1 million, $20.2 million, and $17.3 million for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, respectively.

There was no impairment of the Company’s premises and equipment for the years ended December 31, 2021 and December 31, 2019. The Company recorded a $1.6 million impairment of the Company’s premises and equipment for the year ended December 31, 2020, related to the decision to permanently close twelve branches and reduce the number of cash-only ATMs.

Other Assets

12 Months Ended

Dec. 31, 2021

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Assets

Note 7. Other Assets

The components of the Company’s other assets as of December 31, 2021, and December 31, 2020, were as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines and Federal Reserve Bank Stock	$	36,624	$	33,340
Derivative Financial Instruments		42,011		96,167
Low-Income Housing and Other Equity Investments		136,647		142,961
Deferred Compensation Plan Assets		56,411		53,410
Prepaid Expenses		17,670		14,517
Accounts Receivable		13,323		12,380
Deferred Tax Assets		42,277		16,724
Other		39,764		65,794
Total Other Assets	$	384,727	$	435,293

Deposits

12 Months Ended

Dec. 31, 2021

Deposits [Abstract]

Deposits

Note 8. Deposits

Time Deposits

As of December 31, 2021, and December 31, 2020, the Company’s total time deposits were $1.0 billion and $1.7 billion, respectively. As of December 31, 2021, the contractual maturities of these time deposits were as follows:

(dollars in thousands)	Amount
2022	$	796,092
2023		126,884
2024		29,347
2025		7,228
2026		32,235
Thereafter		8,303
Total	$	1,000,089

The amount of time deposits with balances of $100,000 or more was $0.8 billion as of December 31, 2021, and $1.4 billion as of December 31, 2020. As of December 31, 2021, the contractual maturities of these time deposits were as follows:

(dollars in thousands)	Amount
Three Months or Less	$	290,440
Over Three Months through Six Months		142,166
Over Six Months through Twelve Months		208,867
Over Twelve Months		116,491
Total	$	757,964

Public Deposits

As of December 31, 2021, and December 31, 2020, deposits of governmental entities of $1.2 billion and $1.5 billion, respectively, required collateralization by acceptable investment securities of the Company.

Borrowings

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Borrowings

Note 9. Borrowings

Details of the Company’s short-term borrowings (original term of one year or less) as of December 31, 2021, and December 31, 2020 were as follows:

	December 31,
(dollars in thousands)	2021		2020
Securities Sold Under Agreements to Repurchase (short-term)¹
Amounts Outstanding	$	—	$	100
Weighted-Average Interest Rate		—		1.20	%

Consists entirely of repurchase agreements with government entities. Excludes long-term repurchase agreements with government entities of $0.5 million as of December 31, 2021, and December 31, 2020, and long-term repurchase agreements with private institutions of $450.0 million and $600.0 million as of December 31, 2021, and December 31, 2020, respectively.

The Company’s total securities sold under agreements to repurchase were $450.5 million and $600.6 million as of December 31, 2021, and December 31, 2020, respectively. As of December 31, 2021, all of our repurchase agreements were at fixed interest rates.

As of December 31, 2021, long-term repurchase agreements (original term over one year) placed with government entities were $0.5 million with a weighted-average interest rate of 1.55% and a weighted-average maturity of 2.9 years.

As of December 31, 2021, long-term repurchase agreements placed with private institutions were $450.0 million with a weighted-average interest rate of 2.46%. Remaining terms ranged from 2024 to 2026 with a weighted-average maturity of 3.0 years.

Other Debt

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Other Debt

Note 10. Other Debt

The Company’s other debt as of December 31, 2021, and December 31, 2020, were as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines Advances	$	—	$	50,000
Finance Lease Obligations		10,391		10,481
Total	$	10,391	$	60,481

As a member of the FHLB, the Bank may borrow funds from the FHLB in amounts up to 45% of the Bank’s total assets, provided the Bank is able to pledge an adequate amount of qualified assets to secure the borrowings. As of December 31, 2021, the Company had an undrawn line of credit with the FHLB of $3.0 billion. See Note 4 Loans and Leases and the Allowance for Credit Losses for loans pledged to the FHLB as of December 31, 2021, and December 31, 2020.

Finance lease obligations relate to office space at the Company’s headquarters. The lease began in 1993 and has a 60 year term. Lease payments are fixed at $0.8 million per year through December 2022 and are negotiable thereafter.

As of December 31, 2021, the Company had an undrawn line of credit with the FRB of $385.9 million. See Note 4 Loans and Leases and the Allowance for Credit Losses for loans pledged to the FRB as of December 31, 2021, and December 31, 2020.

Shareholders' Equity

12 Months Ended

Dec. 31, 2021

Stockholders Equity Note [Abstract]

Shareholders' Equity

Note 11. Shareholders’ Equity

Regulatory Capital

The table below sets forth the minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts and ratios for the Company and the Bank as of December 31, 2021, and December 31, 2020:

(dollars in thousands)	Well Capitalized Minimum Ratio			Company			Bank
As of December 31, 2021
Common Shareholders’ Equity				$	1,436,124		$	1,586,473
Common Equity Tier 1 Capital					1,483,455			1,645,405
Tier 1 Capital					1,658,942			1,645,405
Total Capital					1,811,943			1,798,190
Common Equity Tier 1 Capital Ratio		6.5	%		12.12	%		13.47	%
Tier 1 Capital Ratio		8.0	%		13.56	%		13.47	%
Total Capital Ratio		10.0	%		14.81	%		14.72	%
Tier 1 Leverage Ratio		5.0	%		7.32	%		7.26	%

As of December 31, 2020
Common Shareholders’ Equity				$	1,374,507		$	1,290,455
Common Equity Tier 1 Capital					1,361,915			1,289,435
Tier 1 Capital					1,361,915			1,289,435
Total Capital					1,503,784			1,431,106
Common Equity Tier 1 Capital Ratio		6.5	%		12.06	%		11.43	%
Tier 1 Capital Ratio		8.0	%		12.06	%		11.43	%
Total Capital Ratio		10.0	%		13.31	%		12.69	%
Tier 1 Leverage Ratio		5.0	%		6.71	%		6.35	%

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can result in certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classifications are also subject to qualitative judgments by regulators about the components of regulatory capital, risk weightings, and other factors.

Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of Common Equity Tier 1, Tier 1 and Total Capital. Common Equity Tier 1 Capital is common shareholders’ equity, reduced by certain intangible assets, postretirement benefit liability adjustments, and unrealized gains and losses on investment securities. Tier 1 Capital consists of Common Equity Tier 1 Capital and additional tier 1 capital instruments meeting specified requirements. Total Capital is Tier 1 Capital plus an allowable amount of the reserve for credit losses. Risk-weighted assets are calculated by taking assets and credit equivalent amounts of off-balance-sheet items and assigning them to one of several broad risk categories. Four capital ratios are used to measure capital adequacy: Common Equity Tier 1 Capital divided by risk-weighted assets, as defined; Tier 1 Capital divided by risk-weighted assets; Total Capital divided by risk-weighted assets; and the Tier 1 Leverage ratio, which is Tier 1 Capital divided by quarterly adjusted average total assets.

In addition to the minimum risk-based capital requirements, all banks must hold additional capital, referred to as the capital conservation buffer (which is in the form of common equity) under the U.S. Basel III capital framework, to avoid being subject to limits on capital distributions and certain discretionary bonus payments to officers. The capital conservation buffer which was fully phased-in on January 1, 2019, is a minimum of 2.5% of additional capital in addition to the minimum risk-based capital ratios.

As of December 31, 2021, the Company and the Bank were well capitalized as defined in the regulatory framework for prompt corrective action. The capital conservation buffer requirements do not currently result in any limitations on distributions or discretionary bonuses for the Company or the Bank. There were no conditions or events since December 31, 2021, that management believes have changed the Company or the Bank’s capital classifications.

The Company elected to apply the modified transition provision related to the impact of the CECL accounting standard on regulatory capital, as provided by the U.S. banking agencies’ March 2020 interim final rule that was finalized on September 30, 2020. Under the modified CECL transition provision, the regulatory capital impact of the Day 1 adjustment to the allowance for credit losses (after-tax), upon the January 1, 2020, CECL adoption date, has been deferred, and will phase in to regulatory capital at 25% per year commencing January 1, 2022. For the ongoing impact of CECL, the Company is allowed to defer the regulatory capital impact of the allowance for credit losses in an amount equal to 25% of the change in the allowance for credit losses (pre-tax) recognized through earnings for each period between January 1, 2020, and December 31, 2021. The cumulative adjustment to the allowance for credit losses between January 1, 2020, and December 31, 2021, will also phase in to regulatory capital at 25% per year commencing January 1, 2022.

Dividends

Dividends paid by the Parent are substantially funded from dividends received from the Bank. The Bank is subject to federal and state regulatory restrictions that limit cash dividends and loans to the Parent. These restrictions generally require advanced approval from the Bank’s regulator for payment of dividends in excess of the sum of net income for the current calendar year and the retained net income of the prior two calendar years.

Common Stock Repurchase Program

The Parent has a common stock repurchase program in which shares repurchased are held in treasury stock for reissuance in connection with share-based compensation plans and for general corporate purposes. For the year ended December 31, 2021, the Parent repurchased 328,832 shares of common stock under its share repurchase program at an average cost per share of $83.14 and total cost of $27.3 million. From the beginning of the stock repurchase program in July 2001 through December 31, 2021, the Parent repurchased a total of 57.4 million shares of common stock at an average cost of $40.76 per share and total cost of $2.3 billion. The Company suspended share repurchases from March 2020 to July 2021 in light of the COVID-19 pandemic. The actual amount and timing of future share repurchases, if any, will depend on market conditions, applicable SEC rules and various other factors.

Preferred Stock Issuance

On June 15, 2021, the Company issued and sold 7,200,000 depositary shares (the “depositary shares”), each representing a 1/40th ownership interest in a share of 4.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”). The Series A Preferred Stock has a liquidation preference of $

1,000 per share. Net proceeds, after underwriting discounts and expenses, totaled $175.5 million. Dividends on the Series A Preferred Stock are not cumulative and will be paid when declared by the Parent’s Board of Directors to the extent that the Company have legally available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 4.375% per annum. Holders of the Series A Preferred Stock will not have voting rights, except with respect to certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. The Company may redeem the Series A Preferred Stock at its option, (i) in whole or in part, from time to time, on any dividend payment date on or after August 1, 2026 or (ii) in whole but not in part, at any time within 90 days following a regulatory capital treatment event, in either case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share), plus any declared and unpaid dividends.

Accumulated Other Comprehensive Income

The following table presents the components of other comprehensive income (loss), net of tax:

(dollars in thousands)	Before Tax			Tax Effect			Net of Tax
Year Ended December 31, 2021
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	(111,084	)	$	(29,440	)	$	(81,644	)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(3,798	)		(1,007	)		(2,791	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		648			171			477
Net Unrealized Gains (Losses) on Investment Securities		(114,234	)		(30,276	)		(83,958	)
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		10,842			2,874			7,968
Amortization of Net Actuarial Losses (Gains)		2,676			709			1,967
Amortization of Prior Service Credit		(246	)		(65	)		(181	)
Defined Benefit Plans, Net		13,272			3,518			9,754
Other Comprehensive Income (Loss)	$	(100,962	)	$	(26,758	)	$	(74,204	)

Year Ended December 31, 2020
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	58,763		$	15,600		$	43,163
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(77	)		(50	)		(27	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		397			105			292
Net Unrealized Gains (Losses) on Investment Securities		59,083			15,655			43,428
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		(8,187	)		(2,170	)		(6,017	)
Amortization of Net Actuarial Losses (Gains)		2,318			614			1,704
Amortization of Prior Service Credit		(246	)		(65	)		(181	)
Defined Benefit Plans, Net		(6,115	)		(1,621	)		(4,494	)
Other Comprehensive Income (Loss)	$	52,968		$	14,034		$	38,934

Year Ended December 31, 2019
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	30,169		$	8,001		$	22,168
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(152	)		(49	)		(103	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		833			221			612
Net Unrealized Gains (Losses) on Investment Securities		30,850			8,173			22,677
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		(5,046	)		(1,337	)		(3,709	)
Amortization of Net Actuarial Losses (Gains)		1,598			423			1,175
Amortization of Prior Service Credit		(288	)		(76	)		(212	)
Defined Benefit Plans, Net		(3,736	)		(990	)		(2,746	)
Other Comprehensive Income (Loss)	$	27,114		$	7,183		$	19,931

The amount relates to the amortization/accretion of unrealized gains and losses related to the Company's reclassification of available-for-sale investment securities to the held-to-maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.

The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax:

(dollars in thousands)	Investment Securities- Available- For-Sale			Investment Securities- Held-To- Maturities			Defined Benefit Plans			Accumulated Other Comprehensive Income (Loss)
Year Ended December 31, 2021
Balance at Beginning of Period	$	51,495		$	(423	)	$	(43,250	)	$	7,822
Other Comprehensive Income (Loss) Before Reclassifications		(81,644	)		—			7,968			(73,676	)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(2,791	)		477			1,786			(528	)
Total Other Comprehensive Income (Loss)		(84,435	)		477			9,754			(74,204	)
Balance at End of Period	$	(32,940	)	$	54		$	(33,496	)	$	(66,382	)

Year Ended December 31, 2020
Balance at Beginning of Period	$	8,359		$	(715	)	$	(38,756	)	$	(31,112	)
Other Comprehensive Income (Loss) Before Reclassifications		43,163			—			(6,017	)		37,146
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(27	)		292			1,523			1,788
Total Other Comprehensive Income (Loss)		43,136			292			(4,494	)		38,934
Balance at End of Period	$	51,495		$	(423	)	$	(43,250	)	$	7,822

Year Ended December 31, 2019
Balance at Beginning of Period	$	(10,447	)	$	(4,586	)	$	(36,010	)	$	(51,043	)
Other Comprehensive Income (Loss) Before Reclassifications		22,168			—			(3,709	)		18,459
Cumulative Effect of ASU 2019-04		(3,259	)		3,259			—			—
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(103	)		612			963			1,472
Total Other Comprehensive Income (Loss)		18,806			3,871			(2,746	)		19,931
Balance at End of Period	$	8,359		$	(715	)	$	(38,756	)	$	(31,112	)

The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss):

Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified from Accumulated Other Comprehensive Income (Loss)¹									Affected Line Item in the Statement Where Net Income Is Presented
(dollars in thousands)	Year Ended December 31,
	2021			2020			2019
Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity	$	(648	)	$	(397	)	$	(833	)	Interest Income
		171			105			221		Provision for Income Tax
		(477	)		(292	)		(612	)	Net of Tax
Sales of Investment Securities Available-for-Sale		3,798			77			152		Investment Securities Gains (Losses), Net
		(1,007	)		(50	)		(49	)	Provision for Income Tax
		2,791			27			103		Net of Tax

Amortization of Defined Benefit Plans Items
Prior Service Credit ²		246			246			288
Net Actuarial Losses ²		(2,676	)		(2,318	)		(1,598	)
		(2,430	)		(2,072	)		(1,310	)	Total Before Tax
		644			549			347		Provision for Income Tax
		(1,786	)		(1,523	)		(963	)	Net of Tax

Total Reclassifications for the Period	$	528		$	(1,788	)	$	(1,472	)	Net of Tax

¹	^{Amounts in parentheses indicate reductions to net income.}

²	^{These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost and are included in Other Noninterest Expense on the consolidated statements of income (see Note 14 Pension Plans and Postretirement Benefit Plan for additional details).}

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Earnings Per Common Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Common Share

Note 12. Earnings Per Common Share

Earnings per common share is computed using the two-class method. The following is a reconciliation of the weighted average number of common shares used in the calculation of basic and diluted earnings per share and antidilutive stock options and restricted stock outstanding for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:


(dollars in thousands, except shares and per share amounts)	2021		2020		2019
Numerator:
Net Income Available to Common Shareholders	$	250,397	$	153,804	$	225,913

Denominator:
Weighted Average Common Shares Outstanding - Basic		39,837,798		39,726,210		40,384,328
Dilutive Effect of Equity Based Awards		215,866		165,897		265,242
Weighted Average Common Shares Outstanding - Diluted		40,053,664		39,892,107		40,649,570

Earnings Per Common Share:
Basic	$	6.29	$	3.87	$	5.59
Diluted	$	6.25	$	3.86	$	5.56

Antidilutive Stock Options and Restricted Stock Outstanding		41,802		113,410		4,905

Business Segments

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Business Segments

Note 13. Business Segments

The Company’s business segments are defined as Consumer Banking, Commercial Banking, and Treasury and Other. The Company’s internal management accounting process measures the performance of these business segments. This process, which is not necessarily comparable with the process used by any other financial institution, uses various techniques to assign balance sheet and income statement amounts to the business segments, including allocations of income, expense, the provision for credit losses, and capital. This process is dynamic and requires certain allocations based on judgment and other subjective factors. Unlike financial accounting, there is no comprehensive authoritative guidance for management accounting that is equivalent to GAAP. Previously reported results have been reclassified to conform to the current reporting structure.

The net interest income of the business segments reflects the results of a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics and reflects the allocation of net interest income related to the Company’s overall asset and liability management activities on a proportionate basis. The basis for the allocation of net interest income is a function of the Company’s assumptions that are subject to change based on changes in current interest rates and market conditions. Funds transfer pricing also serves to transfer interest rate risk to Treasury. However, the other business segments have some latitude to retain certain interest rate exposures related to customer pricing decisions within guidelines.

The provision for credit losses for the Consumer Banking and Commercial Banking business segments reflects the actual net charge-offs of those business segments. The amount of the consolidated provision for loan and lease losses is based on the methodology that the Company used to estimate our consolidated Allowance. The residual provision for credit losses to arrive at the consolidated provision for credit losses is included in Treasury and Other.

Noninterest income and expense includes allocations from support units to business units. These allocations are based on actual usage where practicably calculated or by management’s estimate of such usage.

The provision for income taxes is allocated to business segments using a 26% effective income tax rate. However, the provision for income taxes for our Leasing business unit (included in the Commercial Banking segment) and Auto Leasing portfolio and Pacific Century Life Insurance business unit (both included in the Consumer Banking segment) are assigned their actual effective income tax rates due to the unique relationship that income taxes have with their products. The residual income tax expense or benefit to arrive at the consolidated effective tax rate is included in Treasury and Other.

Consumer Banking

Consumer Banking offers a broad range of financial products and services, including loan, deposit and insurance products; private banking and international client banking services; trust services; investment management; and institutional investment advisory services. Consumer Banking also provides a full service brokerage offering equities, mutual funds, life insurance, and annuity products. Loan and lease products include residential mortgage loans, home equity lines of credit, automobile loans and leases, personal lines of credit, installment loans, small business loans and leases, and credit cards. Deposit products include checking, savings, and time deposit accounts. Private banking and personal trust groups assist individuals and families in building and preserving their wealth by providing investment, credit, and trust services to high-net-worth individuals. The investment management group manages portfolios utilizing a variety of investment products. Also within Consumer Banking, institutional client services offer investment advice to corporations, government entities, and foundations. Products and services from Consumer Banking are delivered to customers through 54 branch locations and 307 ATMs throughout Hawaii and the Pacific Islands, e-Bankoh (online banking service), a customer service center, and a mobile banking service.

Commercial Banking

Commercial Banking offers products including corporate banking, commercial real estate loans, commercial lease financing, auto dealer financing, and deposit products. Commercial lending and deposit products are offered to middle-market and large companies in Hawaii and the Pacific Islands. In addition, Commercial Banking offers deposit products to government entities in Hawaii. Commercial real estate mortgages focus on customers that include investors, developers, and builders predominantly domiciled in Hawaii. Commercial Banking also includes international banking and provides merchant services to its customers.

Treasury and Other

Treasury consists of corporate asset and liability management activities, including interest rate risk management and a foreign currency exchange business. This segment’s assets and liabilities (and related interest income and expense) consist of interest-bearing deposits, investment securities, federal funds sold and purchased, and short and long-term borrowings. The primary sources of noninterest income are from bank-owned life insurance, net gains from the sale of investment securities, and foreign exchange income related to customer-driven currency requests from merchants and island visitors. The net residual effect of the transfer pricing of assets and liabilities is included in Treasury, along with the elimination of intercompany transactions.

Other organizational units (Technology, Operations, Marketing, Human Resources, Finance, Credit and Risk Management, and Corporate and Regulatory Administration) provide a wide-range of support to the Company’s other income earning segments. Expenses incurred by these support units are charged to the business segments through an internal cost allocation process.

Selected business segment financial information as of and for the years ended December 31, 2021, December 31, 2020, and December 31, 2019 were as follows:

(dollars in thousands)	Consumer Banking			Commercial Banking			Treasury and Other			Consolidated Total
Year Ended December 31, 2021
Net Interest Income	$	283,998		$	194,409		$	18,883		$	497,290
Provision for Credit Losses		5,764			201			(56,465	)		(50,500	)
Net Interest Income After Provision for Credit Losses		278,234			194,208			75,348			547,790
Noninterest Income		131,292			30,637			9,424			171,353
Noninterest Expense		(303,699	)		(64,470	)		(25,420	)		(393,589	)
Income Before Income Taxes		105,827			160,375			59,352			325,554
Provision for Income Taxes		(26,442	)		(39,070	)		(6,670	)		(72,182	)
Net Income	$	79,385		$	121,305		$	52,682		$	253,372
Total Assets as of December 31, 2021	$	7,675,823		$	5,107,001		$	10,002,117		$	22,784,941

Year Ended December 31, 2020
Net Interest Income	$	292,710		$	188,626		$	14,986		$	496,322
Provision for Credit Losses		8,087			(948	)		110,661			117,800
Net Interest Income (Loss) After Provision for Credit Losses		284,623			189,574			(95,675	)		378,522
Noninterest Income		128,400			34,523			21,486			184,409
Noninterest Expense		(289,177	)		(63,294	)		(21,336	)		(373,807	)
Income (Loss) Before Income Taxes		123,846			160,803			(95,525	)		189,124
Provision for Income Taxes		(31,476	)		(40,081	)		36,237			(35,320	)
Net Income (Loss)	$	92,370		$	120,722		$	(59,288	)	$	153,804
Total Assets as of December 31, 2020	$	7,478,813		$	5,116,807		$	8,008,031		$	20,603,651

Year Ended December 31, 2019¹
Net Interest Income	$	305,803		$	185,259		$	6,653		$	497,715
Provision for Credit Losses		11,685			976			3,339			16,000
Net Interest Income After Provision for Credit Losses		294,118			184,283			3,314			481,715
Noninterest Income		142,378			33,362			7,598			183,338
Noninterest Expense		(281,662	)		(84,616	)		(12,949	)		(379,227	)
Income (Loss) Before Provision for Income Taxes		154,834			133,029			(2,037	)		285,826
Provision for Income Taxes		(38,654	)		(28,852	)		7,593			(59,913	)
Net Income	$	116,180		$	104,177		$	5,556		$	225,913
Total Assets as of December 31, 2019¹	$	7,054,511		$	4,254,261		$	6,786,724		$	18,095,496

¹Certain prior period information has been reclassified to conform to current presentations.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Publisher FASB
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+ Details

Employee Benefits

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Employee Benefits

Note 14. Employee Benefits

The Company has defined contribution plans, defined benefit plans, and a postretirement benefit plan.

Defined Contribution Plans

The Bank of Hawaii Retirement Savings Plan (the “Savings Plan”) has three Company contribution components in addition to employee contributions: 1) 401(k) matching, as described below; 2) a 3% fixed amount based on eligible compensation; and 3) a discretionary value-sharing contribution.

Under the 401(k) matching component, participating employees may contribute up to 50% of their eligible compensation (within federal limits) to the Savings Plan. The Company makes matching contributions on behalf of participants equal to $1.25 for each $1.00 contributed by participants, up to 2% of the participants’ eligible compensation, and $0.50 for every $1.00 contributed by participants over 2%, up to 5% of the participants’ eligible compensation. A 3% fixed contribution and a discretionary value-sharing contribution, that is linked to the Company’s financial goals, are made regardless of whether the participating employee contributes to the Savings Plan and are invested in accordance with the participant’s selection of investment options available under the Savings Plan. The Company also has a non-qualified savings plan which covers certain employees with compensation exceeding Internal Revenue Service (“IRS”) limits on pay amounts in the allocation of the Savings Plan’s benefits. Total expense for all components of the Company’s defined contribution plans was $16.0 million, $14.0 million, and $15.2 million for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, respectively.

Defined Benefit Plans

The Company has two defined benefit plans (the “Pension Plans”). In 1995, the Company froze its non-contributory, qualified defined benefit retirement plan (the “Retirement Plan”) and the excess retirement plan (the “Excess Plan”), which covered employees of the Company and participating subsidiaries who met certain eligibility requirements. Beginning January 1, 2001, the Pension Plans no longer provided for compensation increases in the determination of benefits. The projected benefit obligation is equal to the accumulated benefit obligation due to the frozen status of the Pension Plans.

The assets of the Retirement Plan primarily consist of equity and fixed income mutual funds.

The Excess Plan is a non-qualified excess retirement benefit plan which covers certain employees of the Company and participating subsidiaries with compensation exceeding IRS limits on pay amounts applicable to the Pension Plan’s benefit formula. The Excess Plan has no plan assets. The Excess Plan’s projected benefit obligation and accumulated benefit obligation were $3.3 million and $3.6 million for December 31, 2021, and December 31, 2020, respectively.

Postretirement Benefit Plan

The Company’s postretirement benefit plan provides retirees hired before January 1, 2012, with medical and dental insurance coverage. For eligible participants that retired before 2008 and met certain age requirements, the Company and retiree share in the cost of providing postretirement benefits where both the employer and retiree pay a portion of the insurance premiums. Eligible participants who retired before 2008 who did not meet certain age requirements continued on the Company’s benefit plans, but pay for their full insurance premiums. Participants who retired on or after January 1, 2008, who had medical or dental coverage under the Company’s plans immediately before retirement and meet certain age and years of service requirements as of December 31, 2008, are also eligible to participate in the Company’s benefit plans, but must pay for their full insurance premiums. Retirees age 65 and older are provided with a Medicare supplemental plan subsidy. Most employees of the Company who have met certain eligibility requirements are covered by this plan. Participants who retired on or after January 1, 2008, who met certain age and/or years of service requirements, are eligible for the Health Reimbursement Account (“HRA”) program. The HRA program provides retirees with an initial credit based on years of service. Thereafter, an annual credit up to a maximum of $1,200 is provided into the HRA. The retiree may use the HRA for medical, vision, prescription drug and dental premiums, co-payments, and medically necessary health care expenses that are not covered by any medical or dental insurance program or flexible health spending account. The plan was amended to provide access-only coverage for employees hired on or after January 1, 2012, and lowered eligibility for access from age 55 to age 50. These retirees continue on the medical and dental plan until age 65 paying the full premium. As of December 31, 2021, and December 31, 2020, the Company had no segregated assets to provide for postretirement benefits.

The following table provides a reconciliation of changes in benefit obligation and fair value of plan assets, as well as the funded status recognized in the Company’s consolidated statements of condition for the Pension Plans and postretirement benefit plan for the years ended December 31, 2021, and December 31, 2020.

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2021			2020			2021			2020
Benefit Obligation at Beginning of Year	$	117,647		$	110,637		$	31,507		$	27,571
Service Cost		—			—			678			578
Interest Cost		2,924			3,627			816			945
Actuarial Losses (Gains)		(2,817	)		10,364			(2,514	)		3,559
Employer Benefits Paid ¹		(7,169	)		(6,981	)		(1,217	)		(1,146	)
Benefit Obligation at End of Year	$	110,585		$	117,647		$	29,270		$	31,507
Fair Value of Plan Assets at Beginning of Year	$	97,890		$	93,638		$	—		$	—
Actual Return on Plan Assets		10,103			10,764			—			—
Employer Contributions		470			469			1,217			1,146
Employer Benefits Paid ¹		(7,169	)		(6,981	)		(1,217	)		(1,146	)
Fair Value of Plan Assets at End of Year	$	101,294		$	97,890		$	—		$	—
Funded Status at End of Year ²	$	(9,291	)	$	(19,757	)	$	(29,270	)	$	(31,507	)

¹	Participants' contributions relative to the postretirement benefit plan were offset against employer benefits paid in the table above. Participants' contributions for postretirement benefits were $0.8 million for the years ended December 31, 2021, and December 31, 2020.

²	^{Amounts are recognized in Retirement Benefits Payable in the consolidated statements of condition.}

The changes in actuarial losses (gains) related to the Company’s Pension and postretirement benefit Plans are mainly due to changes in discount rates for the years ended December 31, 2021, and December 31, 2020. For the year ended December 31, 2021, the change in discount rate resulted in a $4.3 million decrease to the Company’s Pension Plans liability and a $1.3 million decrease to the Company’s postretirement benefit plan liability. For the year ended December 31, 2020, the change in discount rate resulted in a $9.3 million increase to the Company’s Pension Plans liability and a $2.9 million increase to the Company’s postretirement benefit plan liability.

The following presents the amounts recognized in the Company’s accumulated other comprehensive income for the Pension Plans and postretirement benefit plan as of December 31, 2021, and December 31, 2020.

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2021			2020			2021		2020
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax
Net Actuarial Gains (Losses)	$	(35,014	)	$	(43,101	)	$	235	$	(1,613	)
Net Prior Service Credit		—			—			1,283		1,464
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax	$	(35,014	)	$	(43,101	)	$	1,518	$	(149	)

Components of net periodic benefit cost for the Company’s Pension Plans and the postretirement benefit plan are presented in the following table for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

	Pension Benefits									Postretirement Benefits
(dollars in thousands)	2021			2020			2019			2021			2020			2019
Service Cost	$	—		$	—		$	—		$	678		$	578		$	455
Interest Cost		2,924			3,627			4,401			816			945			1,025
Expected Return on Plan Assets		(4,592	)		(5,028	)		(4,993	)		—			—			—
Amortization of:
Prior Service Credit ¹		—			—			—			(246	)		(246	)		(288	)
Net Actuarial Losses (Gains) ¹		2,676			2,318			1,937			—			—			(339	)
Net Periodic Benefit Cost	$	1,008		$	917		$	1,345		$	1,248		$	1,277		$	853

¹	Represents reclassification adjustments from accumulated other comprehensive income during the period.

Assumptions used to determine the benefit obligations as of December 31, 2021, and December 31, 2020, for the Company’s Pension Plans and postretirement benefit plan were as follows:

	Pension Benefits						Postretirement Benefits
	2021			2020			2021			2020
Weighted Average Assumptions as of December 31:
Discount Rate		2.89	%		2.55	%		3.00	%		2.66	%
Health Care Cost Trend Rate Assumed For Next Year		—			—			5.70	%		5.50	%

The health care cost trend rate is assumed to decrease annually, until reaching the ultimate trend rate of 4.0% in 2045.

Assumptions used to determine the net periodic benefit cost for the Company’s Pension Plans and postretirement benefit plan for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

	Pension Benefits									Postretirement Benefits
	2021			2020			2019			2021			2020			2019
Weighted Average Assumptions as of December 31:
Discount Rate		2.55	%		3.36	%		4.41	%		2.66	%		3.42	%		4.48	%
Expected Long-Term Rate of Return on Plan Assets		5.25	%		5.75	%		5.75	%		—			—			—
Health Care Cost Trend Rate		—			—			—			5.50	%		5.70	%		6.00	%

A combination of factors is used by management in determining the expected long-term rate of return on plan assets. Historical return experience for major asset categories are evaluated and current market factors, such as inflation and interest rates, are considered in determining the expected long-term rate of return assumption.

The Company expects to contribute $0.4 million to the Pension Plans and $1.4 million to the postretirement benefit plan for the year ending December 31, 2022.

As of December 31, 2021, expected benefits to be paid in each of the next five years and in the aggregate for the five years thereafter were as follows:

(dollars in thousands)	Pension Benefits		Postretirement Benefits
2022	$	7,387	$	1,375
2023		7,417		1,423
2024		7,399		1,456
2025		7,367		1,512
2026		7,297		1,549
Years 2027-2031		34,473		8,362

Retirement Plan Assets

The Company’s overall investment strategy is to maintain the purchasing power of the current assets and all future contributions by producing positive rates of return on plan assets; achieve capital growth towards the attainment of full funding of the Retirement Plan’s termination liability; maximize returns within reasonable and prudent levels of risk; and control costs of administering the plan and managing the investments. The long-term investment objective is to achieve an overall annualized total return, gross of fees, above the blended benchmark index comprised of 36% MSCI USA IMI Index, 24% MSCI ACWI ex-US IMI Index, and 40% Barclays Aggregate Bond Index.

Subject to liquidity requirements, the asset allocation targets are 60% for equity securities, 40% for fixed income securities with a 10% to 20% range permitted from the strategic targets, and zero to 20% for cash. Within the equity securities portfolio, the range for domestic securities is from 50% to 100% and the range for international securities is from 0% to 50%. All assets selected for the Retirement Plan must have a readily ascertainable market value and must be readily marketable.

Due to market fluctuations or cash flows, the allocation for each asset class may be breached by as much as 5% on a temporary basis. However, asset allocations are expected to conform to target ranges within 90 days of such an occurrence.

The fair values of the Retirement Plan assets as of December 31, 2021, and December 31, 2020, by asset category were as follows:

	Fair Value Measurements
Asset Category (dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total as of Dec. 31, 2021		Total as of Dec. 31, 2020
Cash	$	618	$	—	$	—	$	618	$	1,079
Equity Securities – Mutual Funds:
Large-Cap		511		—		—		511		1,849
Mixed-Cap		33,108		—		—		33,108		29,802
International		29,022		—		—		29,022		28,055
Emerging Market		1,786		—		—		1,786		2,494
Fixed Income Securities – Mutual Funds		36,249		—		—		36,249		34,611
Total	$	101,294	$	—	$	—	$	101,294	$	97,890

Quoted prices for these investments were available in active markets, and therefore were classified as Level 1 measurements in the fair value hierarchy.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Share-Based Compensation

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

Note 15. Share-Based Compensation

The Company has share-based compensation plans which allow grants of stock options, restricted stock, stock appreciation rights, and restricted stock units to its employees and non-employee directors. The Company’s employee stock option plans are shareholder approved and administered by the Human Resources and Compensation Committee of the Board of Directors. Stock options provide grantees the option to purchase shares of the Parent’s common stock at a specified exercise price and, generally, expire 10 years from the date of grant. Stock option grants include incentive and non-qualified stock options whose vesting may be subject to one or more criteria, including employment or achievement of Company performance measures. Stock option exercise prices were equal to the quoted market price of the Parent’s common stock on the date of grant. Restricted stock provides grantees with rights to shares of common stock upon completion of one or more criteria, including service period, performance or other conditions as established by the Compensation Committee, such as vesting tied to the Company’s financial performance relative to the peer group or achievement of an absolute financial performance target. During the restriction period, all shares are considered outstanding and dividends are paid on the restricted stock. Generally, restricted stock vests over periods ranging from one year to five years from the date of grant. Restricted stock and dividends may be forfeited if an employee terminates prior to vesting.

As of December 31, 2021, total shares authorized under the plans were 2.1 million shares, of which 1.3 million shares were available for future grants.

The Company recognizes compensation expense, measured as the fair value of the share-based award on the date of grant, on a straight-line basis over the requisite service period. Share-based compensation is recorded in the statements of income as a component of salaries and benefits for employees and as a component of other noninterest expense for non-employee directors, with a corresponding increase to capital surplus in shareholders’ equity. For the years ended December 31, 2021, December 31, 2020, and December 31, 2019, compensation expense and the related income tax benefit recognized for stock options and restricted stock were as follows:

(dollars in thousands)	2021		2020		2019
Compensation Expense	$	13,267	$	7,578	$	8,338
Income Tax Benefit		3,520		2,009	2,210

Restricted Stock

As of December 31, 2021, unrecognized compensation expense related to unvested restricted stock was $24.0 million. The unrecognized compensation expense is expected to be recognized over a weighted average period of 2.28 years.

The following table presents the activity for restricted stock:

	Number of Shares			Weighted Average Grant Date Fair Value		Grant Date Fair Value of Restricted Stock that Vested During the Year (in thousands)
Unvested as of December 31, 2018		314,487		$	78.17
Granted		130,093			82.82
Vested		(107,759	)		66.46	$	8,910
Forfeited		(26,872	)		83.34
Unvested as of December 31, 2019		309,949		$	83.75
Granted		161,168			80.97
Vested		(99,894	)		84.69	$	8,544
Forfeited		(42,454	)		84.36
Unvested as of December 31, 2020		328,769		$	82.02
Granted		292,007			90.23
Vested		(97,278	)		78.55	$	8,673
Forfeited		(22,962	)		86.48
Unvested as of December 31, 2021 ¹		500,536		$	87.28

¹ As of December 31, 2021, 138,872 shares were unvested from service-based grants.

Restricted Stock Units

There were no RSUs granted during December 31, 2021, December 31, 2020, and December 31, 2019. All RSUs were fully vested as of December 31, 2019. The RSUs vest over periods ranging from three years to four years from the date of grant and are subject to forfeiture until performance and employment targets are achieved. Upon vesting, the RSUs are converted to cash based on the closing stock price on the vesting date. During December 31, 2021 and December 31, 2020, there was no recognized compensation expense related to RSUs. Total recognized compensation expense related to the RSUs was $1.0 million for the year ended December 31, 2019.

The following table presents the activity for RSUs:

	Number of Units			Weighted Average Grant Date Fair Value		Fair Value of Restricted Stock Unit that Vested During the Year (in thousands)
Balance as of December 31, 2018		52,064		$	63.92
Vested		(52,064	)		82.23	$	4,311
Balance as of December 31, 2019		—		$	—

Stock Options

There were no stock options granted during the years ended December 31, 2021, December 31, 2020, and December 31, 2019. All previously issued stock options granted were fully vested prior to December 31, 2018. The Company reissues treasury stock to satisfy stock option exercises.

The following table presents the activity related to stock options under all plans for the year ended December 31, 2021:

	Stock Options				Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)			Aggregate Intrinsic Value (in thousands)
Stock Options Outstanding as of January 1, 2021		184,054			$	45.28
Exercised		(165,920	)			45.04
Expired		(833	)			42.22
Stock Options Outstanding as of December 31, 2021		17,301		47.72				0.1		$	624
Stock Options Vested and Exercisable as of December 31, 2021		17,301		47.72				0.1	624

The following summarizes certain stock option activity of the Company for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

(dollars in thousands)	2021		2020		2019
Intrinsic Value of Stock Options Exercised	$	6,755	$	2,261	$	1,106
Cash Received from Stock Options Exercised		7,473		2,438		1,473
Tax Benefits Realized from Stock Options Exercised		1,611		485		727

Income Taxes

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Note 16. Income Taxes

Provision for Income Taxes

The components of the Company’s provision for income taxes for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

(dollars in thousands)	2021		2020			2019
Current:
Federal	$	58,652	$	65,840		$	60,902
State		10,510		12,066			14,426
Total Current		69,162		77,906			75,328
Deferred:
Federal		2,254		(31,783	)		(9,630	)
State		766		(10,803	)		(5,785	)
Total Deferred		3,020		(42,586	)		(15,415	)
Provision for Income Taxes	$	72,182	$	35,320		$	59,913

The tax effects of fair value adjustments on AFS investment securities, the amortization of unrealized gains and losses related to investment securities transferred to HTM, and the minimum pension liability adjustment are recorded directly to consolidated shareholders’ equity. The Company elected to adopt ASU No. 2016-09 “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” in the first quarter of 2017, which requires the Company to record excess tax benefits related to stock options as a reduction of the provision for income taxes, whereas they were previously recognized in equity. The net tax benefit recorded directly to consolidated shareholders’ equity was $26.8 million for the year ended December 31, 2021. The net tax charge recorded directly to consolidated shareholders’ equity was $16.2 million and $7.1 million for the year ended December 31, 2020, and December 31, 2019, respectively.

Deferred Tax Liabilities and Assets

As of December 31, 2021, and December 31, 2020, significant components of the Company’s deferred tax liabilities and assets were as follows:

	December 31,
(dollars in thousands)	2021			2020
Deferred Tax Liabilities:
Accelerated Depreciation	$	(8,131	)	$	(8,042	)
Accrued Pension Cost		(11,270	)		(11,270	)
Federal Home Loan Bank of Des Moines Stock		(2,885	)		(3,416	)
Lease Transactions		(37,585	)		(41,726	)
Operating Lease Liabilities		(25,348	)		(26,387	)
Energy Tax Credits		—			(674	)
Net Unrealized Gains on Investments Securities		—			(18,407	)
Investment in Variable Interest Entities		(1,657	)		(2,725	)
Deferred Loan Fees		(3,845	)		(4,736	)
Originated Mortgage Servicing Rights		(6,068	)		(5,579	)
Other		(915	)		(1,124	)
Gross Deferred Tax Liabilities		(97,704	)		(124,086	)
Deferred Tax Assets:
Allowance for Credit Losses		43,348			57,840
Minimum Pension Liability		12,082			13,430
Accrued Expenses		22,416			17,629
Postretirement Benefit Obligations		7,170			7,980
Capital Lease Expenses		2,163			2,168
Operating Lease Right-of-Use Assets		27,360			28,473
Restricted Stock		4,442			3,669
Net Unrealized Losses on Investments Securities		11,868			—
Deductible State and Local Taxes		3,239			3,366
Low Income Housing Investments		3,007			3,648
Other		6,089			6,204
Gross Deferred Tax Assets Before Valuation Allowance		143,184			144,407
Valuation Allowance		(3,203	)		(3,597	)
Gross Deferred Tax Assets After Valuation Allowance		139,981			140,810
Net Deferred Tax Assets	$	42,277		$	16,724

Both positive and negative evidence were considered by management in determining the need for a valuation allowance. Negative evidence included the uncertainty regarding the generation of capital gains in future years and restrictions on the ability to sell low-income housing investments during periods when carrybacks/carryforwards of capital losses are allowed. Positive evidence included capital gains in the carryback years. After considering all available evidence, management determined that a valuation allowance to offset deferred tax assets related to low-income housing investments that can only be used to offset capital gains was appropriate. Management determined that a valuation allowance was not required for the remaining deferred tax assets because it is more likely than not that these assets will be realized through future reversals of existing taxable temporary differences, and there will be sufficient future taxable income exclusive of reversing temporary differences. As of December 31, 2021, and December 31, 2020, the Company carried a valuation allowance of $3.2 million and $3.6 million, respectively, related to the deferred tax assets established in connection with the low-income housing investments.

Certain events covered by Internal Revenue Code Section 593(e) will trigger a recapture of base year reserves of acquired thrift institutions. The base year reserves of acquired thrift institutions would be recaptured if an entity ceases to qualify as a bank for federal income tax purposes. The base year reserves of thrift institutions also remain subject to income tax penalty provisions that, in general, require recapture upon certain stock redemptions of, and excess distributions to, shareholders. As of December 31, 2021, retained earnings included $18.2 million of base year reserves for which the deferred federal income tax liability of $4.8 million has not been recognized.

Effective Tax Rate

The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

	2021			2020			2019
Statutory Federal Income Tax Rate		21.00	%		21.00	%		21.00	%
Increase (Decrease) in Income Tax Rate Resulting From:
State Taxes, Net of Federal Income Tax		2.85			0.81			2.53
Low-Income Housing Investments		0.77			0.82			0.60
Investment Tax Credits		(0.35	)		(1.24	)		(0.84	)
Bank-Owned Life Insurance		(0.48	)		(0.82	)		(0.51	)
Tax-Exempt Income		(0.24	)		(0.50	)		(0.53	)
Leveraged Lease		(0.10	)		(0.56	)		(1.54	)
Other		(1.28	)		(0.83	)		0.25
Effective Tax Rate		22.17	%		18.68	%		20.96	%

Unrecognized Tax Benefits

The Company is required to record a liability, referred to as an unrecognized tax benefit (“UTB”), for the entire amount of benefit taken in a prior or future income tax return when the Company determines that a tax position has a less than 50% likelihood of being accepted by the taxing authority. The following presents a reconciliation of the Company’s liability for UTBs for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

(dollars in thousands)	2021			2020			2019
Unrecognized Tax Benefits at Beginning of Year	$	5,403		$	6,120		$	5,541
Gross Increases, Related to Tax Positions Taken in a Prior Period		261			374			673
Gross Decreases, Related to Tax Positions Taken in a Prior Period		(1,285	)		—			—
Gross Increases, Related to Current Period Tax Positions		234			222			715
Lapse of Statute of Limitations		(598	)		(1,313	)		(809	)
Unrecognized Tax Benefits at End of Year	$	4,015		$	5,403		$	6,120

As of December 31, 2021, and December 31, 2020, $4.0 million and $5.4 million, respectively, in liabilities for UTBs were related to UTBs that if reversed would have an impact on the Company’s effective tax rate.

Management believes that it is reasonably possible that the Company’s liability for UTBs could further decrease as a result of the expiration of statutes of limitations within the next 12 months. However, management is currently not able to estimate a range of possible change in the amount of the liability for UTBs recorded as of December 31, 2021.

The Company classifies interest and penalties, if any, related to the liability for UTBs as a component of the provision for income taxes. The recorded net tax benefit for interest and penalties was less than $0.1 million for the year ended December 31, 2021. For the years ended, December 31, 2020 and December 31, 2019, the Company recorded a net tax provision of less than $0.1 million and $0.5 million, respectively, for interest and penalties. As of December 31, 2021, and December 31, 2020, the balance of the accrual for possible interest and penalties was $1.5 million.

The federal tax returns for 2018 through 2020 remain subject to examination. The Company's State of Hawaii income tax returns for 2016 through 2020 remain subject to examination by the taxing authorities.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Derivative Financial Instruments

12 Months Ended

Dec. 31, 2021

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 17. Derivative Financial Instruments

The notional amount and fair value of the Company’s derivative financial instruments as of December 31, 2021, and December 31, 2020, were as follows:

	December 31, 2021					December 31, 2020
(dollars in thousands)	Notional Amount		Fair Value			Notional Amount		Fair Value
Interest Rate Lock Commitments	$	45,857	$	1,084		$	102,881	$	4,947
Forward Commitments		58,523		(35	)		158,759		(740	)
Interest Rate Swap Agreements
Receive Fixed/Pay Variable Swaps		1,400,322		28,742			1,362,778		90,130
Pay Fixed/Receive Variable Swaps		1,400,322		(5,922	)		1,362,778		(17,197	)
Foreign Exchange Contracts		102,548		(674	)		90,587		866
Conversion Rate Swap Agreement		131,672		—			133,286		—

The following table presents the Company’s derivative financial instruments, their fair values, and their location in the consolidated statements of condition as of December 31, 2021, and December 31, 2020:

	December 31, 2021				December 31, 2020
Derivative Financial Instruments Not Designated as Hedging Instruments ¹ (dollars in thousands)	Asset Derivatives		Liability Derivatives		Asset Derivatives		Liability Derivatives
Interest Rate Lock Commitments	$	1,084	$	—	$	4,947	$	—
Forward Commitments		17		52		—		740
Interest Rate Swap Agreements		40,733		17,913		90,342		17,409
Foreign Exchange Contracts		177		851		878		12
Total	$	42,011	$	18,816	$	96,167	$	18,161

¹	Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the consolidated statements of condition.

The following table presents the Company’s derivative financial instruments and the amount and location of the net gains or losses recognized in the consolidated statements of income for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

	Location of Net Gains	Year Ended December 31,
Derivative Financial Instruments Not Designated as Hedging Instruments (dollars in thousands)	(Losses) Recognized in the Statements of Income	2021		2020			2019
Interest Rate Lock Commitments	Mortgage Banking	$	8,771	$	22,348		$	12,185
Forward Commitments	Mortgage Banking		1,580		(4,274	)		(2,340	)
Interest Rate Swap Agreements	Other Noninterest Income		6,579		15,468			7,172
Foreign Exchange Contracts	Other Noninterest Income		1,462		1,940			2,891
Conversion Rate Swap Agreement	Investment Securities Gains (Losses), Net		—		—			(453	)
Total		$	18,392	$	35,482		$	19,455

Management has received authorization from the Bank’s Board of Directors to use derivative financial instruments as an end-user in connection with the Bank’s risk management activities and to accommodate the needs of the Bank’s customers. As with any financial instrument, derivative financial instruments have inherent risks. Market risk is defined as the risk of adverse financial impact due to fluctuations in interest rates, foreign exchange rates, and equity prices. Market risks associated with derivative financial instruments are balanced with the expected returns to enhance earnings performance and shareholder value, while limiting the volatility of each. The Company uses various processes to monitor its overall market risk exposure, including sensitivity analysis, value-at-risk calculations, and other methodologies.

Derivative financial instruments are also subject to credit and counterparty risk, which is defined as the risk of financial loss if a borrower or counterparty is either unable or unwilling to repay borrowings or settle transactions in accordance with the underlying contractual terms. Credit and counterparty risks associated with derivative financial instruments are similar to those relating to traditional financial instruments. The Company manages derivative credit and counterparty risk by evaluating the creditworthiness of each borrower or counterparty, adhering to the same credit approval process used for commercial lending activities.

As of December 31, 2021, and December 31, 2020, the Company did not designate any derivative financial instruments as formal hedging relationships. The Company’s free-standing derivative financial instruments are required to be carried at their fair value on the Company’s consolidated statements of condition. These financial instruments have been limited to interest rate lock commitments (“IRLCs”), forward commitments, interest rate swap agreements, foreign exchange contracts, and conversion rate swap agreements.

Interest Rate Lock Commitments/Forward Commitments

The Company enters into IRLCs for residential mortgage loans which commit us to lend funds to a potential borrower at a specific interest rate and within a specified period of time. IRLCs that relate to the origination of mortgage loans that will be held for sale are considered derivative financial instruments under applicable accounting guidance. Outstanding IRLCs expose the Company to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. To mitigate this risk, the Company utilizes forward commitments as economic hedges against the potential decreases in the values of the loans held for sale. IRLCs and forward commitments are free-standing derivatives which are carried at fair value with changes recorded in the mortgage banking component of noninterest income in the Company’s consolidated statements of income.

Interest Rate Swap Agreements

The Company enters into swap agreements to facilitate the risk management strategies of a small number of commercial banking customers. The Company mitigates the interest rate risk of entering into these agreements by entering into equal and offsetting interest rate swap agreements with highly rated third party financial institutions. The interest rate swap agreements are free-standing derivatives and are recorded at fair value in the Company’s consolidated statements of condition (asset positions are included in other assets and liability positions are included in other liabilities). Fair value changes are recorded in other noninterest income in the Company’s consolidated statements of income. The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under these arrangements for financial statement presentation purposes. The master netting arrangements provide for a single net settlement of all swap agreements, as well as collateral, in the event of default on, or termination of, any one contract. Collateral, usually in the form of marketable securities, is posted by the party (i.e., the Company or the financial institution counterparty) with net liability positions in accordance with contract thresholds. The Company had a net liability positions with its financial institution counterparties totaling $5.9 million and $17.2 million as of December 31, 2021, and December 31, 2020, respectively.

Parties to a centrally cleared over-the-counter derivative exchange daily payments that reflect the daily change in value of the derivative. Effective 2017, these payments, commonly referred to as variation margin, will be recorded as settlements of the derivatives’ mark-to-market exposure rather than collateral against the exposures. This rule change effectively results in any centrally cleared derivative having a fair value that approximates zero on a daily basis. Substantially all of the Company’s swap agreements originated after the rule change are centrally cleared. The uncleared swap agreements executed with third party financial institutions will remain subject to the collateral requirements and credit-risk-related contingent features described in the previous paragraphs, and therefore, are not subject to the variation margin rule change. Likewise, the swap agreements executed with the Company’s commercial banking customers will remain uncleared and will also not be subject to the variation margin rule change. See Note 19 to the Consolidated Financial Statements for more information on the interest rate swap agreements.

Foreign Exchange Contracts

The Company utilizes foreign exchange contracts to offset risks related to transactions executed on behalf of customers. The foreign exchange contracts are free-standing derivatives which are carried at fair value with changes included in other noninterest income in the Company’s consolidated statements of income.

Conversion Rate Swap Agreements

As certain sales of Visa Class B restricted shares were completed, the Company entered into a conversion rate swap agreement with the buyer that requires payment to the buyer in the event Visa further reduces the conversion rate of Class B into Class A unrestricted common shares. In the event of Visa increasing the conversion rate, the buyer would be required to make payment to the Company. As of December 31, 2021, and December 31, 2020, the conversion rate swap agreements were valued at zero (i.e., no contingent liability recorded) as further reductions to the conversion rate were deemed neither probable nor reasonably estimable by management. See Note 3 Investment Securities for more information.

Affordable Housing Projects Tax Credit Partnerships

12 Months Ended

Dec. 31, 2021

Equity Method Investments And Joint Ventures [Abstract]

Affordable Housing Projects Tax Credit Partnerships

Note 18. Affordable Housing Projects Tax Credit Partnerships

The Company makes equity investments in various limited partnerships or limited liability companies that sponsor affordable housing projects utilizing the Low Income Housing Tax Credit (“LIHTC”) pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital, to facilitate the sale of affordable housing product offerings, and to assist in achieving goals associated with the Community Reinvestment Act. The primary activities of these entities include the identification, development, and operation of multi-family housing that is leased to qualifying residential tenants. Generally, these types of investments are funded through a combination of debt and equity.

The Company is a limited partner or non-managing member in each LIHTC limited partnership or limited liability company, respectively. Each of these entities is managed by an unrelated third-party general partner or managing member who exercises significant control over the affairs of the entity. The general partner or managing member has all the rights, powers and authority granted or permitted to be granted to a general partner of a limited partnership or managing member of a limited liability company. Duties entrusted to the general partner or managing member include, but are not limited to: investment in operating companies, company expenditures, investment of excess funds, borrowing funds, employment of agents, disposition of fund property, prepayment and refinancing of liabilities, votes and consents, contract authority, disbursement of funds, accounting methods, tax elections, bank accounts, insurance, litigation, cash reserve, and use of working capital reserve funds. Except for limited rights granted to the limited partner(s) or non-managing member(s) relating to the approval of certain transactions, the limited partner(s) and non-managing members may not participate in the operation, management, or control of the entity’s business, transact any business in the entity’s name or have any power to sign documents for or otherwise bind the entity. In addition, the general partner or managing member may only be removed by the limited partner(s) or managing member(s) in the event of a failure to comply with the terms of the agreement or negligence in performing its duties.

The general partner or managing member of each entity has both the power to direct the activities which most significantly affect the performance of each entity and the obligation to absorb losses or the right to receive benefits that could be significant to the entities. Therefore, the Company has determined that it is not the primary beneficiary of any LIHTC entity. The Company uses the effective yield method to account for its pre-2015 investments in these entities. Beginning January 1, 2015, any new investments that meet the requirements of the proportional amortization method are recognized using the proportional amortization method. The Company’s net affordable housing tax credit investments and related unfunded commitments were $134.7 million and $138.9 million as of December 31, 2021, and December 31, 2020, respectively, and are included in other assets in the consolidated statements of condition.

Unfunded Commitments

As of December 31, 2021, the expected payments for unfunded affordable housing commitments were as follows:

(dollars in thousands)	Amount
2022	$	7,553
2023		811
2024		21,432
2025		756
2026		81
Thereafter		13,332
Total Unfunded Commitments	$	43,965

The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

(dollars in thousands)	2021		2020		2019
Effective Yield Method
Tax credits and other tax benefits recognized	$	8,604	$	11,752	$	11,719
Amortization Expense in Provision for Income Taxes		6,700		8,586		7,566

Proportional Amortization Method
Tax credits and other tax benefits recognized	$	10,831	$	6,633	$	3,014
Amortization Expense in Provision for Income Taxes		9,375		5,729		2,578

There were no impairment losses related to LIHTC investments for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

Securities Sold Under Agreements to Repurchase

12 Months Ended

Dec. 31, 2021

Securities Sold Under Agreements To Repurchase [Abstract]

Securities Sold Under Agreements to Repurchase

Note 19. Securities Sold Under Agreements to Repurchase

The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Company to repurchase the assets. As a result, these repurchase agreements are accounted for as collateralized financing arrangements (i.e., secured borrowings) and not as sales and subsequent repurchases of securities. The obligation to repurchase the securities is reflected as a liability in the Company’s consolidated statements of condition, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts. As a result, there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities. In addition, as the Company does not enter into reverse Repurchase Agreements, there is no such offsetting to be done with the repurchase agreements.

The right of setoff for a repurchase agreement resembles a secured borrowing, whereby the collateral pledged by the Company would be used to settle the fair value of the repurchase agreement should the Company be in default (e.g., fail to make an interest payment to the counterparty). For private institution repurchase agreements, if the private institution counterparty were to default (e.g., declare bankruptcy), the Company could cancel the repurchase agreement (i.e., cease payment of principal and interest) and attempt collection on the amount of collateral value in excess of the repurchase agreement fair value. The collateral is held by a third party financial institution in the counterparty’s custodial account. The counterparty has the right to sell or repledge the investment securities. For government entity repurchase agreements, the collateral is held by the Company in a segregated custodial account under a tri-party agreement. The Company is required by the counterparty to maintain adequate collateral levels. In the event the collateral fair value falls below stipulated levels, the Company will pledge additional securities. The Company closely monitors collateral levels to ensure adequate levels are maintained, while mitigating the potential risk of over-collateralization in the event of counterparty default.

The following table presents the remaining contractual maturities of the Company’s repurchase agreements as of December 31, 2021, and December 31, 2020, disaggregated by the class of collateral pledged.

	Remaining Contractual Maturity of Repurchase Agreements
(dollars in thousands)	Up to 90 days		91-365 days		1-3 Years		After 3 Years		Total
December 31, 2021
Class of Collateral Pledged:
Debt Securities Issued by States and Political Subdivisions	$	—	$	—	$	—	$	490	$	490
Mortgage-Backed Securities:
Residential - Government Agencies		—		—		38,685		13,407		52,092
Residential - U.S. Government-Sponsored Enterprises		—		—		236,315		161,593		397,908
Total	$	—	$	—	$	275,000	$	175,490	$	450,490

December 31, 2020
Class of Collateral Pledged:
Debt Securities Issued by States and Political Subdivisions	$	100	$	—	$	—	$	490	$	590
Mortgage-Backed Securities: ¹
Residential - Government Agencies		—		—		20,210		83,599		103,809
Residential - U.S. Government-Sponsored Enterprises		—		—		4,790		491,401		496,191
Total	$	100	$	—	$	25,000	$	575,490	$	600,590

¹ The class of collateral pledged as of December 31, 2020, have been updated to properly reflect the remaining contractual maturity of repurchase agreements.

The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of December 31, 2021, and December 31, 2020. The swap agreements that the Company have with our commercial banking customers are not subject to an enforceable master netting arrangement, and therefore, are excluded from this table. As previously mentioned, centrally cleared swap agreements between the Company and institutional counterparties are also excluded from this table.

	(i)		(ii)		(iii) = (i)-(ii)		(iv)				(v) = (iii)- (iv)
							Gross Amounts Not Offset in the Statements of Condition
(dollars in thousands)	Gross Amounts Recognized in the Statements of Condition		Gross Amounts Offset in the Statements of Condition		Net Amounts Presented in the Statements of Condition		Netting Adjustments per Master Netting Arrangements		Fair Value of Collateral Pledged ¹		Net Amount
December 31, 2021
Assets:
Interest Rate Swap Agreements:
Institutional Counterparties	$	26	$	—	$	26	$	26	$	—	$	—

Liabilities:
Interest Rate Swap Agreements:
Institutional Counterparties		5,948		—		5,948		26		5,922		—

Repurchase Agreements:
Private Institutions		450,000		—		450,000		—		450,000		—
Government Entities		490		—		490		—		490		—
Total Repurchase Agreements	$	450,490	$	—	$	450,490	$	—	$	450,490	$	—

December 31, 2020
Assets:
Interest Rate Swap Agreements:
Institutional Counterparties	$	5	$	—	$	5	$	5	$	—	$	—

Liabilities:
Interest Rate Swap Agreements:
Institutional Counterparties		17,202		—		17,202		5		7,911		9,286

Repurchase Agreements:
Private Institutions		600,000		—		600,000		—		600,000		—
Government Entities		590		—		590		—		590		—
Total Repurchase Agreements	$	600,590	$	—	$	600,590	$	—	$	600,590	$	—

The application of collateral cannot reduce the net amount below zero. Therefore, excess collateral is not reflected in this table. For interest rate swap agreements, the fair value of investment securities pledged was $58.3 million and $7.9 million as of December 31, 2021, and December 31, 2020, respectively. For repurchase agreements with private institutions, the fair value of investment securities pledged was $523.4 million and $635.2 million as of December 31, 2021, and December 31, 2020, respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $1.3 million and $2.5 million as of December 31, 2021, and December 31, 2020, respectively.

Commitments, Contingencies, and Guarantees

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments, Contingencies, and Guarantees

Note 20. Commitments, Contingencies, and Guarantees

The Company’s credit commitments as of December 31, 2021, were as follows:

(dollars in thousands)	December 31, 2021
Unfunded Commitments to Extend Credit	$	2,982,673
Standby Letters of Credit		135,167
Commercial Letters of Credit		18,956
Total	$	3,136,796

Unfunded Commitments to Extend Credit

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of the terms or conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since commitments may expire without being drawn, the total commitment amount does not necessarily represent future cash requirements.

Standby and Commercial Letters of Credit

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Standby letters of credit generally become payable upon the failure of the customer to perform according to the terms of the underlying contract with the third party, while commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and a third party. The contractual amount of these letters of credit represents the maximum potential future payments guaranteed by the Company. The Company has recourse against the customer for any amount it is required to pay to a third party under a standby letter of credit, and generally holds cash or deposits as collateral on those standby letters of credit for which collateral is deemed necessary. Assets valued at $103.0 million secured certain specifically identified standby letters of credit as of December 31, 2021. As of December 31, 2021, the standby and commercial letters of credit had remaining terms ranging from 1 to 14 months.

Contingencies

On September 9, 2016, a purported class action lawsuit was filed by a Bank customer primarily alleging Bank of Hawaii’s practice of determining whether consumer deposit accounts were overdrawn based on “available balance” (which deducts debit card transactions that have taken place but which have not yet been posted) was not properly applied or disclosed to customers. On December 6, 2019, the parties executed a settlement agreement subject to court approval. The settlement provides for forgiveness of certain related and previously charged off overdraft fees, and a payment by the Company of $8.0 million into a class settlement fund the proceeds of which will be used to refund class members, and to pay attorneys’ fees, administrative and other costs, in exchange for a complete release of all claims asserted against the Company. Although the Company previously established a $2.0 million reserve relating to this claim, the reserve has been increased to a total of $8.0 million as of December 31, 2020. On December 22, 2020, the Court issued an Order Granting Final Approval of Class Action Settlement and the settlement became effective on January 21, 2021. Refunds to current customers were issued by the Bank on January 26, 2021, and the Claims Administrator is in the process of issuing refunds to class members with closed accounts.

In addition to the litigation noted above, the Company is subject to various other pending and threatened legal proceedings arising out of the normal course of business or operations. On at least a quarterly basis, the Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the most recent information available. On a case-by-case basis, reserves are established for those legal claims for which it is probable that a loss will be incurred and the amount of such loss can be reasonably estimated. Based on information currently available, management believes that the eventual outcome of these claims against the Company will not be materially in excess of such amounts reserved by the Company. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these matters may result in a loss that materially exceeds the reserves established by the Company.

Fair Value of Assets and Liabilities

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities

Note 21. Fair Value of Assets and Liabilities

Fair Value Hierarchy

The following is a description of the valuation methodologies and key inputs used to measure assets and liabilities recorded at fair value on a recurring basis. See Note 1 to the Consolidated Financial Statements for more information on our fair value measurements.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Investment Securities Available-for-Sale

Level 1 investment securities are comprised of debt securities issued by the U.S. Treasury, as quoted prices were available, unadjusted, for identical securities in active markets. Level 2 investment securities were primarily comprised of debt securities issued by the Small Business Administration, states and municipalities, corporations, as well as mortgage-backed securities issued by government agencies and government-sponsored enterprises. Fair values were estimated primarily by obtaining quoted prices for similar assets in active markets or through the use of pricing models. In cases where there may be limited or less transparent information provided by the Company’s third party pricing service, fair value may be estimated by the use of secondary pricing services or through the use of non-binding third party broker quotes.

Loans Held for Sale

The fair value of the Company’s residential mortgage loans held for sale was determined based on quoted prices for similar loans in active markets, and therefore, is classified as a Level 2 measurement.

Mortgage Servicing Rights

The Company estimates the fair value of mortgage servicing rights by using a discounted cash flow model to calculate the present value of estimated future net servicing income. The Company stratifies its mortgage servicing portfolio on the basis of loan type. The assumptions used in the discounted cash flow model are those that the Company believes market participants would use in estimating future net servicing income. Significant assumptions in the valuation of mortgage servicing rights include estimated loan repayment rates, the discount rate, servicing costs, and the timing of cash flows, among other factors. Mortgage servicing rights are classified as Level 3 measurements due to the use of significant unobservable inputs, as well as significant management judgment and estimation.

Other Assets

Other assets recorded at fair value on a recurring basis are primarily comprised of investments related to deferred compensation arrangements. Quoted prices for these investments, primarily in mutual funds, are available in active markets. Thus, the Company’s investments related to deferred compensation arrangements are classified as Level 1 measurements in the fair value hierarchy.

Derivative Financial Instruments

Derivative financial instruments recorded at fair value on a recurring basis are comprised of interest rate lock commitments (“IRLCs”), forward commitments, interest rate swap agreements, foreign exchange contracts, and Visa Class B to Class A shares conversion rate swap agreements. The fair values of IRLCs are calculated based on the value of the underlying loan held for sale, which in turn is based on quoted prices for similar loans in the secondary market. However, this value is adjusted by a factor which considers the likelihood that the loan in a locked position will ultimately close. This factor, the closing ratio, is derived from the Bank’s internal data and is adjusted using significant management judgment. As such, IRLCs are classified as Level 3 measurements. Forward commitments are classified as Level 2 measurements as they are primarily based on quoted prices from the secondary market based on the settlement date of the contracts, interpolated or extrapolated, if necessary, to estimate a fair value as of the end of the reporting period. The fair values of interest rate swap agreements are calculated using a discounted cash flow approach and utilize Level 2 observable inputs such as a market yield curve, effective date, maturity date, notional amount, and stated interest rate. The valuation methodology for cleared interest rate swaps with financial institution counterparties (and the related customer interest rate swaps) is based on the Secured Overnight Financing Rate, while the valuation methodology for uncleared interest rate swaps is based on the Effective Federal Funds Rate. In addition, the Company includes in its fair value calculation a credit factor adjustment which is based primarily on management judgment. Thus, interest rate swap agreements are classified as a Level 3 measurement. The fair values of foreign exchange contracts are calculated using the Bank’s multi-currency accounting system which utilizes contract specific information such as currency, maturity date, contractual amount, and strike price, along with market data information such as the spot rates of specific currency and yield curves. Foreign exchange contracts are classified as Level 2 measurements because while they are valued using the Bank’s multi-currency accounting system, significant management judgment or estimation is not required. The fair value of the Visa Class B restricted shares to Class A unrestricted common shares conversion rate swap agreements represent the amount owed by the Company to the buyer of the Visa Class B shares as a result of a reduction of the conversion ratio subsequent to the sales date. As of December 31, 2021, and December 31, 2020, the conversion rate swap agreements were valued at zero as reductions to the conversion ratio were neither probable nor reasonably estimable by management. See Note 17 Derivative Financial Instruments for more information.

The Company is exposed to credit risk if borrowers or counterparties fail to perform. The Company seeks to minimize credit risk through credit approvals, limits, monitoring procedures, and collateral requirements. The Company generally enters into transactions with borrowers of high credit quality and counterparties that carry high quality credit ratings. Credit risk associated with borrowers or counterparties as well as the Company’s non-performance risk is factored into the determination of the fair value of derivative financial instruments.

The table below presents the balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2021, and December 31, 2020:

(dollars in thousands)	Quoted Prices In Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
December 31, 2021
Assets:
Investment Securities Available-for-Sale
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	114,845	$	135,242	$	—	$	250,087
Debt Securities Issued by States and Political Subdivisions		—		75,818		—		75,818
Debt Securities Issued by U.S. Government-Sponsored Enterprises		—		1,780		—		1,780
Debt Securities Issued by Corporations		—		383,113		—		383,113
Mortgage-Backed Securities:
Residential - Government Agencies		—		1,319,042		—		1,319,042
Residential - U.S. Government-Sponsored Enterprises		—		2,090,326		—		2,090,326
Commercial - Government Agencies		—		155,890		—		155,890
Total Mortgage-Backed Securities		—		3,565,258		—		3,565,258
Total Investment Securities Available-for-Sale		114,845		4,161,211		—		4,276,056
Loans Held for Sale		—		26,746		—		26,746
Mortgage Servicing Rights		—		—		800		800
Other Assets		56,411		—		—		56,411
Derivatives ¹		—		194		41,817		42,011
Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2021	$	171,256	$	4,188,151	$	42,617	$	4,402,024
Liabilities:
Derivatives¹	$	—	$	903	$	17,913	$	18,816
Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2021	$	—	$	903	$	17,913	$	18,816
December 31, 2020
Assets:
Investment Securities Available-for-Sale
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	921	$	173,324	$	—	$	174,245
Debt Securities Issued by States and Political Subdivisions		—		24,840		—		24,840
Debt Securities Issued by U.S. Government-Sponsored Enterprises		—		1,062		—		1,062
Debt Securities Issued by Corporations		—		224,605		—		224,605
Mortgage-Backed Securities:
Residential - Government Agencies		—		1,594,815		—		1,594,815
Residential - U.S. Government-Sponsored Enterprises		—		1,518,283		—		1,518,283
Commercial - Government Agencies		—		253,839		—		253,839
Total Mortgage-Backed Securities		—		3,366,937		—		3,366,937
Total Investment Securities Available-for-Sale		921		3,790,768		—		3,791,689
Loans Held for Sale		—		82,565		—		82,565
Mortgage Servicing Rights		—		—		958		958
Other Assets		53,410		—		—		53,410
Derivatives¹		—		878		95,289		96,167
Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2020	$	54,331	$	3,874,211	$	96,247	$	4,024,789
Liabilities:
Derivatives ¹	$	—	$	752	$	17,409	$	18,161
Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2020	$	—	$	752	$	17,409	$	18,161

¹	The fair value of each class of derivatives is shown in Note 17 Derivative Financial Instruments.

For the years ended December 31, 2021, and December 31, 2020, the changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:

(dollars in thousands)	Mortgage Servicing Rights ¹			Net Derivative Assets and Liabilities ²
Year Ended December 31, 2021
Balance as of January 1, 2021	$	958		$	77,880
Realized and Unrealized Net Gains (Losses):
Included in Net Income		(158	)		8,848
Transfers to Loans Held for Sale		—			(12,634	)
Variation Margin Payments		—			(50,190	)
Balance as of December 31, 2021	$	800		$	23,904
Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of December 31, 2021	$	—		$	23,904

Year Ended December 31, 2020
Balance as of January 1, 2020	$	1,126		$	22,573
Realized and Unrealized Net Gains (Losses):
Included in Net Income		(168	)		22,219
Transfers to Loans Held for Sale		—			(18,681	)
Variation Margin Payments		—			51,769
Balance as of December 31, 2020	$	958		$	77,880
Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of December 31, 2020	$	—		$	77,880

¹	Realized and unrealized gains and losses related to mortgage servicing rights are reported as a component of mortgage banking income in the Company’s consolidated statements of income.

^{Realized and unrealized gains and losses related to interest rate lock commitments are reported as a component of mortgage banking income in the Company’s consolidated statements of income. Realized and unrealized gains and losses related to interest rate swap agreements are reported as a component of other noninterest income in the Company’s consolidated statements of income.}

For Level 3 assets and liabilities measured at fair value on a recurring or nonrecurring basis as of December 31, 2021, and December 31, 2020, the significant unobservable inputs used in the fair value measurements were as follows:

		December 31, 2021												December 31, 2020
(dollars in thousands)	Valuation Technique	Description	Range						Weighted Average¹			Fair Value		Weighted Average¹			Fair Value
Mortgage Servicing Rights	Discounted Cash Flow	Constant Prepayment Rate		6.51	%	-	11.48	%		10.70	%	$	22,251		14.42	%	$	19,652
		Discount Rate		6.49	%	-	7.08	%		7.04	%				5.81	%

Net Derivative Assets and Liabilities:
Interest Rate Lock Commitments	Pricing Model	Closing Ratio		75.40	%	-	100.00	%		90.47	%	$	1,084		90.76	%	$	4,947
Interest Rate Swap Agreements	Discounted Cash Flow	Credit Factor		0.00	%	-	0.49	%		0.14	%	$	22,820		0.29	%	$	72,933

¹ Unobservable inputs for mortgage servicing rights and interest rate lock commitments were weighted by loan amount. Unobservable inputs for interest rate swap agreements were weighted by fair value.

Significant increases (decreases) in any of these inputs in isolation could result in a significantly lower (higher) fair value measurement. Although the constant prepayment rate and the discount rate are not directly interrelated, they generally move in opposite directions of each other.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

The Company may be required periodically to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower-of-cost-or-fair value accounting or impairment write-downs of individual assets. The following table represents the assets measured at fair value on a nonrecurring basis as of December 31, 2021.

(dollars in thousands)	Fair Value Hierarchy	Net Carrying Amount		Valuation Allowance
December 31, 2021
Mortgage Servicing Rights - amortization method	Level 3	$	21,451	$	(1,829	)

December 31, 2020
Mortgage Servicing Rights - amortization method	Level 3	$	18,694	$	(3,892	)

The write-down of mortgage servicing rights accounted for under the amortization method was primarily due to changes in certain key assumptions used to estimate fair value. As previously mentioned, all of the Company's mortgage servicing rights are classified as Level 3 measurements due to the use of significant unobservable inputs, as well as significant management judgment and estimation.

Fair Value Option

The following table reflects the difference between the aggregate fair value and the aggregate unpaid principal balance of the Company’s residential mortgage loans held for sale as of December 31, 2021, and December 31, 2020.

(dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Aggregate Unpaid Principal
December 31, 2021
Loans Held for Sale	$	26,746	$	26,309	$	437

December 31, 2020
Loans Held for Sale	$	82,565	$	78,577	$	3,988

Changes in the estimated fair value of residential mortgage loans held for sale are reported as a component of mortgage banking income in the Company’s consolidated statements of income. For the years ended December 31, 2021, and December 31, 2020, the net gains or losses from the change in fair value of the Company’s residential mortgage loans held for sale were not material.

Financial Instruments Not Recorded at Fair Value on a Recurring Basis

The following presents the carrying amount, fair value, and placement in the fair value hierarchy of the Company’s financial instruments not recorded at fair value on a recurring basis as of December 31, 2021, and December 31, 2020. This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For non-marketable equity securities such as Federal Home Loan Bank of Des Moines and Federal Reserve Bank stock, the carrying amount is a reasonable estimate of fair value as these securities can only be redeemed or sold at their par value and only to the respective issuing government supported institution or to another member institution. For financial liabilities such as noninterest-bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity.

					Fair Value Measurements
(dollars in thousands)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2021
Financial Instruments – Assets
Investment Securities Held-to-Maturity	$	4,694,780	$	4,646,619	$	131,139	$	4,515,480	$	—
Loans		11,921,869		12,094,631		—		—		12,094,631

Financial Instruments – Liabilities
Time Deposits		1,000,089		998,134		—		998,134		—
Securities Sold Under Agreements to Repurchase		450,490		469,293		—		469,293		—

December 31, 2020
Financial Instruments – Assets
Investment Securities Held-to-Maturity	$	3,262,727	$	3,348,693	$	7,500	$	3,341,193	$	—
Loans		11,536,011		12,019,151		—		—		12,019,151

Financial Instruments – Liabilities
Time Deposits		1,662,063		1,667,774		—		1,667,774		—
Securities Sold Under Agreements to Repurchase		600,590		649,039		—		649,039		—
Other Debt ¹		50,000		51,546		—		51,546		—

¹	Excludes finance lease obligations.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Revenue Recognition

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Revenue Recognition

Note 22. Revenue Recognition

On January 1, 2018, the Company adopted ASU No. 2014-09 “Revenue from Contracts with Customers” (Topic 606) and all subsequent ASUs that modified Topic 606. As stated in Note 1 Summary of Significant Accounting Policies, the implementation of the new standard did not have a material impact on the measurement or recognition of revenue; as such, a cumulative effect adjustment to opening retained earnings was not deemed necessary. Results for reporting periods beginning after January 1, 2018, are presented under Topic 606, while prior period amounts were not adjusted and continue to be reported in accordance with the Company’s historic accounting under Topic 605.

Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities, which comprise the majority of the Company’s revenue. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, and derivatives are also not in the scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as trust and asset management income, deposit related fees, interchange fees, merchant income, and annuity and insurance commissions. However, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Substantially all of the Company’s revenue is generated from contracts with customers. Noninterest revenue streams in-scope of Topic 606 are discussed below.

Trust and Asset Management

Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to customers’ accounts. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered.

Service Charges on Deposit Accounts

Service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts), monthly service fees, check orders, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transactional based, and therefore, the Company’s performance obligation is satisfied and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts.

Fees, Exchange, and Other Service Charges

Fees, exchange, and other service charges are primarily comprised of debit card income, ATM fees, merchant services income, credit card commissions and other service charges. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a Company cardholder uses a non-Company ATM or a non-Company cardholder uses a Company ATM. Merchant services income mainly represents fees charged to merchants to process their debit and credit card transactions, in addition to account management fees. Credit card commissions related to the Company’s co-branded credit cards with Hawaiian Airlines are primarily earned through card customer spending and new card account openings. Other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month.

Annuity and Insurance

Annuity and insurance income primarily consists of commissions received on annuity product sales. The Company acts as an intermediary between the Company’s customer and the insurance carrier. The Company’s performance obligation is generally satisfied upon the issuance of the annuity policy. Shortly after the policy is issued, the carrier remits the commission payment to the Company, and the Company recognizes the revenue. The Company does not earn a significant amount of trailer fees on annuity sales. The majority of the trailer fees relates to variable annuity products and are calculated based on a percentage of market value at period end. Revenue is not recognized until the annuity’s market value can be determined.

Other

Other noninterest income consists of other recurring revenue streams such as commissions from sales of mutual funds and other investments, investment advisor fees from the Company’s Managed Account Platform Services (“MAPS”) wealth management product, safety deposit box rental fees, and other miscellaneous revenue streams. Commissions from the sale of mutual funds and other investments are recognized on trade date, which is when the Company has satisfied its performance obligation. The Company also receives periodic service fees (i.e., trailers) from mutual fund companies typically based on a percentage of net asset value. Trailer revenue is recorded over time, usually monthly or quarterly, as net asset value is determined. Investment advisor fees from the MAPS wealth management product is earned over time and based on an annual percentage rate of the net asset value. The investment advisor fees are charged to the customer’s account in advance on the first month of the quarter, and the revenue is recognized over the following three-month period. Safe deposit box rental fees are charged to the customer on an annual basis and recognized upon receipt of payment. The Company determined that since rentals and renewals occur fairly consistently over time, revenue is recognized on a basis consistent with the duration of the performance obligation.

The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

	Year Ended December 31,
(dollars in thousands)	2021		2020		2019
Noninterest Income
In-scope of Topic 606:
Trust and Asset Management	$	46,068	$	43,456	$	44,233
Service Charges on Deposit Accounts		12,181		11,715		13,042
Fees, Exchange, and Other Service Charges		41,962		36,005		46,381
Annuity and Insurance		3,130		3,249		6,813
Other		8,684		8,626		9,633
Noninterest Income (in-scope of Topic 606)		112,025		103,051		120,102
Noninterest Income (out-of-scope of Topic 606)		59,328		81,358		63,236
Total Noninterest Income	$	171,353	$	184,409	$	183,338

Contract Balances

A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. The Company’s noninterest revenue streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is often received immediately or shortly after the Company satisfies its performance obligation and revenue is recognized. The Company does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. As of December 31, 2021 and December 31, 2020, the Company did not have any significant contract balances.

Contract Acquisition Costs

In connection with the adoption of Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a customer if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. Upon adoption of Topic 606, the Company did not capitalize any contract acquisition cost.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

+ Details

Leases

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Leases

Note 23. Leases

A lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. On January 1, 2019, the Company adopted ASU No. 2016-02 “Leases” (Topic 842) and all subsequent ASUs that modified Topic 842. For the Company, Topic 842 primarily affected the accounting treatment for operating lease agreements in which the Company is the lessee.

Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space with terms extending through 2052. Portions of certain properties are subleased for terms extending through 2033. Substantially all of the Company’s leases are classified as operating leases, and therefore, were previously not recognized on the Company’s consolidated statements of condition. With the adoption of Topic 842, operating lease agreements are required to be recognized on the consolidated statements of condition as right-of-use (“ROU”) assets and corresponding lease liabilities. The Company has one existing finance lease (previously referred to as a capital lease) for a portion of the Company’s principal offices with a lease term through 2052. As this lease was previously required to be recorded on the Company’s consolidated statements of condition, Topic 842 did not materially impact the accounting for this lease.

The following table represents the consolidated statements of condition classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the consolidated statements of condition.

(dollars in thousands)		December 31, 2021		December 31, 2020
Lease Right-of-Use Assets	Classification
Operating lease right-of-use assets	Operating Lease Right-of-Use Assets	$	95,621	$	99,542
Finance lease right-of-use assets	Premises and Equipment, Net		2,232		2,304
Total Lease Right-of-Use Assets		$	97,853	$	101,846

Lease Liabilities
Operating lease liabilities	Operating Lease Liabilities	$	103,210	$	107,412
Finance lease liabilities	Other Debt		10,391		10,481
Total Lease Liabilities		$	113,601	$	117,893

The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019, was used. For the Company’s only finance lease, the Company utilized its incremental borrowing rate at lease inception.

	December 31, 2021			December 31, 2020
Weighted-Average Remaining Lease Term
Operating leases	16.4 years			17.0 years
Finance leases	31.0 years			32.0 years
Weighted-Average Discount Rate
Operating leases		3.57	%		3.61	%
Finance leases		7.04	%		7.04	%

The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Variable lease cost also includes payments for ATM location leases in which payments are based on a percentage of ATM transactions (i.e., ATM surcharge fees), rather than a fixed amount.

(dollars in thousands)	2021			2020
Lease Costs
Operating lease cost	$	11,493		$	12,281
Variable lease cost		2,954			5,549
Short-term lease cost		407			587
Interest on lease liabilities ¹		735			741
Amortization of right-of-use assets		72			72
Sublease income		(7,452	)		(7,804	)
Net Lease Costs	$	8,209		$	11,426

Other Information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	13,741		$	12,349
Operating cash flows from finance leases		735			741
Financing cash flows from finance leases		90			84
Right-of-use assets obtained in exchange for new operating lease liabilities		12,207			11,185

¹	Included in other debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in net occupancy expense.

On January 22, 2021, the Board of Directors of Bank of Hawaii Corporation approved the permanent closure of 12 branches primarily located within local supermarkets in order to increase efficiency and meet changing customer needs. As a result, the Company recorded a total charge of $5.6 million during the fourth quarter of 2020. This aggregate charge included a $2.5 million impairment charge to write off the related ROU assets. The adjustment to the related lease liabilities was not material.

Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of December 31, 2021, were as follows:

(dollars in thousands)	Finance Leases			Operating Leases
2022	$	825		$	11,100
2023		825			10,298
2024		825			9,430
2025		825			8,852
2026		825			7,618
Thereafter		21,455			92,849
Total Future Minimum Lease Payments		25,580			140,147
Amounts Representing Interest		(15,189	)		(36,937	)
Present Value of Net Future Minimum Lease Payments	$	10,391		$	103,210

The Company, as lessor, leases and subleases certain properties to third party lessees. Rental income for these operating leases were $9.8 million, $10.3 million, and $10.7 million for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, respectively.

Future minimum rental income under operating leases, including subleases, as of December 31, 2021, were as follows:

(dollars in thousands)	Minimum Rental Income
2022	$	5,807
2023		4,382
2024		2,829
2025		1,919
2026		1,232
Thereafter		3,635
Total	$	19,804

Bank of Hawaii Corporation Financial Statements

12 Months Ended

Dec. 31, 2021

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

Bank of Hawaii Corporation Financial Statements

Note 24. Bank of Hawaii Corporation Financial Statements

Condensed financial statements of the Parent were as follows:

Condensed Statements of Comprehensive Income

	Year Ended December 31,
(dollars in thousands)	2021			2020			2019
Income
Dividends from Bank of Hawaii	$	62,000		$	134,000		$	220,000
Investment Securities Gains (Losses), Net		(948	)		13,336			(850	)
Other Income and Interest on Investment		6			154			261
Total Income		61,058			147,490			219,411
Noninterest Expense
Intercompany Salaries and Services		764			758			768
Other Expenses		1,787			1,864			1,682
Total Noninterest Expense		2,551			2,622			2,450
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries		58,507			144,868			216,961
Income Tax Benefit (Expense)		2,131			(2,395	)		1,818
Equity in Undistributed Income of Subsidiaries		192,734			11,331			7,134
Net Income	$	253,372		$	153,804		$	225,913
Comprehensive Income	$	179,168		$	192,738		$	245,844

Condensed Statements of Condition

(dollars in thousands)	December 31, 2021		December 31, 2020
Assets
Cash with Bank of Hawaii	$	6,376	$	66,704
Investment Securities Held-to-Maturity		2,500		2,501
Goodwill		14,129		14,129
Other Assets		14,130		12,305
Equity in Net Assets of Subsidiaries		1,586,473		1,290,455
Total Assets	$	1,623,608	$	1,386,094

Liabilities
Income Taxes Payable	$	38	$	974
Other Liabilities		11,959		10,613
Total Liabilities		11,997		11,587
Shareholders' Equity		1,611,611		1,374,507
Total Liabilities and Shareholders' Equity	$	1,623,608	$	1,386,094

Condensed Statements of Cash Flows

	Year Ended December 31,
(dollars in thousands)	2021			2020			2019
Operating Activities
Net Income	$	253,372		$	153,804		$	225,913
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Share-Based Compensation		779			795			760
Net (Gains) Losses on Sales of Investment Securities		948			(13,336	)		850
Equity in Undistributed Income of Subsidiaries		(192,734	)		(11,331	)		(7,134	)
Net Change in Other Assets and Other Liabilities		(977	)		(68	)		(135	)
Net Cash Provided by Operating Activities		61,388			129,864			220,254

Investing Activities
Capital Contributions to the Bank		(165,000	)		—			—
Proceeds from (Expenses related to) Sales of Investment Securities		(948	)		18,336			4,259
Purchase of Investment Securities Held-to-Maturity		—			(2,501	)		(4,933	)
Net Cash Provided by (Used in) Investing Activities		(165,948	)		15,835			(674	)

Financing Activities
Proceeds from Issuance of Common Stock		13,611			9,389			7,872
Proceeds from Issuance of Preferred Stock		175,487			—			—
Repurchase of Common Stock		(31,258	)		(18,006	)		(137,649	)
Cash Dividends Paid Common Stock		(110,633	)		(107,434	)		(105,478	)
Cash Dividends Paid Preferred Stock		(2,975	)		—			—
Net Cash Provided by (Used in) Financing Activities		44,232			(116,051	)		(235,255	)

Net Change in Cash and Cash Equivalents		(60,328	)		29,648			(15,675	)
Cash and Cash Equivalents at Beginning of Period		66,704			37,056			52,731
Cash and Cash Equivalents at End of Period	$	6,376		$	66,704		$	37,056

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Basis of Presentation

Certain prior period information has been reclassified to conform to the current year presentation.

Consolidation

Variable Interest Entities

Investment Securities

Loans Held for Sale

Loans and Leases

Non-Performing Loans and Leases

Loans Modified in a Troubled Debt Restructuring

Reserve for Credit Losses

Allowance for Credit Losses - Loans and Leases (the "Allowance")

Allowance for Credit Losses - Loans and Leases (the “Allowance”)

Commercial Portfolio Segment

Consumer Portfolio Segment

The Company also considers qualitative adjustments to the quantitative baseline. For example, the Company considers the impact of current environmental factors at the reporting date that did not exist over the period from which historical experience was used. The environmental factors considered for the consumer portfolio are similar to the aforementioned factors considered for the commercial portfolio.

See Note 4 Loans and Leases and the Allowance for Credit Losses for more information.

Allowance for Credit Losses - Held-to-Maturity (“HTM”) Debt Securities

Allowance for Credit Losses - Available-for-Sale (“AFS”) Debt Securities

Collateral-Dependent Loans

Reserve for Unfunded Commitments

Cash and Cash Equivalents

Premises and Equipment

Foreclosed Real Estate

Mortgage Servicing Rights

Goodwill

Non-Marketable Equity Securities

Bank-Owned Life Insurance

Securities Sold Under Agreements to Repurchase

Pension and Postretirement Benefit Plans

Income Taxes

Preferred Stock Issuance

Treasury Stock

Earnings Per Common Share

Derivative Financial Instruments

Share-Based Compensation

Advertising Costs

International Operations

The Bank has operations that are conducted in certain Pacific Islands that are denominated in U.S. dollars. These operations are classified as domestic.

Fair Value Measurements

Level 1:	Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available. A contractually binding sales price also provides reliable evidence of fair value.
Level 2:	Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that utilize model-based techniques for which all significant assumptions are observable in the market.
Level 3:	Inputs to the valuation methodology are unobservable and significant to the fair value measurement; inputs to the valuation methodology that utilize model-based techniques for which significant assumptions are not observable in the market; or inputs to the valuation methodology that requires significant management judgment or estimation, some of which may be internally developed.

See Note 14 Employee Benefits and Note 21 Fair Value of Assets and Liabilities for the required fair value measurement disclosures.

Recent Accounting Standards Adopted

(dollars in thousands)	December 31, 2019		CECL Adoption Impact			January 1, 2020
Allowance for Credit Losses:
Commercial	$	73,801	$	(18,789	)	$	55,012
Consumer		36,226		17,052			53,278
Total Allowance for Credit Losses		110,027		(1,737	)		108,290
Reserve for Unfunded Commitments		6,822		(3,335	)		3,487
Total Reserve for Credit Losses	$	116,849	$	(5,072	)	$	111,777
Retained Earnings
Total Pre-tax Impact			$	5,072
Tax Effect				(1,440	)
Increase to Retained Earnings			$	3,632

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Allowance for Credit Losses Upon Adoption of ASU 2016-13

This “Day 1” impact of CECL adoption is summarized below:

(dollars in thousands)	December 31, 2019		CECL Adoption Impact			January 1, 2020
Allowance for Credit Losses:
Commercial	$	73,801	$	(18,789	)	$	55,012
Consumer		36,226		17,052			53,278
Total Allowance for Credit Losses		110,027		(1,737	)		108,290
Reserve for Unfunded Commitments		6,822		(3,335	)		3,487
Total Reserve for Credit Losses	$	116,849	$	(5,072	)	$	111,777
Retained Earnings
Total Pre-tax Impact			$	5,072
Tax Effect				(1,440	)
Increase to Retained Earnings			$	3,632

Restrictions on Cash and Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2021

Cash And Cash Equivalents [Abstract]

Schedule of Reconciliation of Cash and Cash Equivalents

(dollars in thousands)	December 31, 2021		December 31, 2020
Interest-Bearing Deposits in Other Banks	$	2,571	$	1,646
Funds Sold		361,536		333,022
Cash and Due From Banks		196,327		279,420
Total Cash and Cash Equivalents	$	560,434	$	614,088

Investment Securities (Tables)

12 Months Ended

Dec. 31, 2021

Investments Debt And Equity Securities [Abstract]

Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities

The amortized cost, gross unrealized gains and losses, and fair value of the Company’s investment securities as of December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
December 31, 2021
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	248,858	$	1,513	$	(284	)	$	250,087
Debt Securities Issued by States and Political Subdivisions		74,743		1,080		(5	)		75,818
Debt Securities Issued by U.S. Government-Sponsored Enterprises		1,758		33		(11	)		1,780
Debt Securities Issued by Corporations		384,590		2,339		(3,816	)		383,113
Mortgage-Backed Securities:
Residential - Government Agencies		1,327,990		9,818		(18,766	)		1,319,042
Residential - U.S. Government-Sponsored Enterprises		2,127,781		4,792		(42,247	)		2,090,326
Commercial - Government Agencies		155,164		1,885		(1,159	)		155,890
Total Mortgage-Backed Securities		3,610,935		16,495		(62,172	)		3,565,258
Total	$	4,320,884	$	21,460	$	(66,288	)	$	4,276,056
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	131,495	$	287	$	(643	)	$	131,139
Debt Securities Issued by Corporations		20,316		76		(249	)		20,143
Mortgage-Backed Securities:
Residential - Government Agencies		1,774,394		12,139		(30,621	)		1,755,912
Residential - U.S. Government-Sponsored Enterprises		2,286,880		15,508		(32,627	)		2,269,761
Commercial - Government Agencies		481,695		324		(12,355	)		469,664
Total Mortgage-Backed Securities		4,542,969		27,971		(75,603	)		4,495,337
Total	$	4,694,780	$	28,334	$	(76,495	)	$	4,646,619
December 31, 2020
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	174,409	$	427	$	(591	)	$	174,245
Debt Securities Issued by States and Political Subdivisions		23,540		1,301		(1	)		24,840
Debt Securities Issued by U.S. Government-Sponsored Enterprises		985		77		—			1,062
Debt Securities Issued by Corporations		220,717		4,844		(956	)		224,605
Mortgage-Backed Securities:
Residential - Government Agencies		1,561,603		33,657		(445	)		1,594,815
Residential - U.S. Government-Sponsored Enterprises		1,497,353		21,254		(324	)		1,518,283
Commercial - Government Agencies		243,029		10,868		(58	)		253,839
Total Mortgage-Backed Securities		3,301,985		65,779		(827	)		3,366,937
Total	$	3,721,636	$	72,428	$	(2,375	)	$	3,791,689
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	7,500	$	8	$	(8	)	$	7,500
Debt Securities Issued by States and Political Subdivisions		33,763		741		—			34,504
Debt Securities Issued by Corporations		12,031		251		—			12,282
Mortgage-Backed Securities:
Residential - Government Agencies		917,459		30,580		(29	)		948,010
Residential - U.S. Government-Sponsored Enterprises		2,099,053		51,735		(291	)		2,150,497
Commercial - Government Agencies		192,921		3,179		(200	)		195,900
Total Mortgage-Backed Securities		3,209,433		85,494		(520	)		3,294,407
Total	$	3,262,727	$	86,494	$	(528	)	$	3,348,693
December 31, 2019
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	222,365	$	213	$	(1,447	)	$	221,131
Debt Securities Issued by States and Political Subdivisions		54,480		631		(14	)		55,097
Debt Securities Issued by U.S. Government-Sponsored Enterprises		22,128		19		—			22,147
Debt Securities Issued by Corporations		335,553		1,401		(633	)		336,321
Mortgage-Backed Securities:
Residential - Government Agencies		1,164,466		11,627		(3,267	)		1,172,826
Residential - U.S. Government-Sponsored Enterprises		584,272		4,363		(1,874	)		586,761
Commercial - Government Agencies		224,372		2,889		(2,541	)		224,720
Total Mortgage-Backed Securities		1,973,110		18,879		(7,682	)		1,984,307
Total	$	2,607,636	$	21,143	$	(9,776	)	$	2,619,003
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	274,375	$	1,319	$	(31	)	$	275,663
Debt Securities Issued by States and Political Subdivisions		54,811		1,236		—			56,047
Debt Securities Issued by Corporations		14,975		—		(138	)		14,837
Mortgage-Backed Securities:
Residential - Government Agencies		1,067,416		13,247		(5,348	)		1,075,315
Residential - U.S. Government-Sponsored Enterprises		1,546,479		13,871		(2,478	)		1,557,872
Commercial - Government Agencies		84,238		317		(1,407	)		83,148
Total Mortgage-Backed Securities		2,698,133		27,435		(9,233	)		2,716,335
Total	$	3,042,294	$	29,990	$	(9,402	)	$	3,062,882

Analysis of the Contractual Maturities of Investment Securities

(dollars in thousands)	Amortized Cost		Fair Value
Available-for-Sale:
Due in One Year or Less	$	972	$	978
Due After One Year Through Five Years		214,558		215,275
Due After Five Years Through Ten Years		347,391		345,996
Due After Ten Years		13,130		13,305
		576,051		575,554
Debt Securities Issued by Government Agencies		133,898		135,244
Mortgage-Backed Securities:
Residential - Government Agencies		1,327,990		1,319,042
Residential - U.S. Government-Sponsored Enterprises		2,127,781		2,090,326
Commercial - Government Agencies		155,164		155,890
Total Mortgage-Backed Securities		3,610,935		3,565,258
Total	$	4,320,884	$	4,276,056
Held-to-Maturity:
Due After One Year Through Five Years	$	16,537	$	16,391
Due After Five Years Through Ten Years		123,996		123,862
Due After Ten Years		11,278		11,029
		151,811		151,282
Mortgage-Backed Securities:
Residential - Government Agencies		1,774,394		1,755,912
Residential - U.S. Government-Sponsored Enterprises		2,286,880		2,269,761
Commercial - Government Agencies		481,695		469,664
Total Mortgage-Backed Securities		4,542,969		4,495,337
Total	$	4,694,780	$	4,646,619

Schedule of Gains (Losses) on Sales of Investment Securities

The table below presents the gains and losses from the sales of investment securities for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

(dollars in thousands)	2021			2020			2019
Gross Gains on Sales of Investment Securities	$	3,825		$	14,257		$	7,810
Gross Losses on Sales of Investment Securities		(5,122	)		(4,325	)		(11,796	)
Net Gains (Losses) on Sales of Investment Securities	$	(1,297	)	$	9,932		$	(3,986	)

Schedule of AFS Debt Securities in an Unrealized Loss Position

	Less Than 12 Months					12 Months or Longer					Total
(dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
December 31, 2021
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	51,455	$	(195	)	$	9,995	$	(89	)	$	61,450	$	(284	)
Debt Securities Issued by States and Political Subdivisions		643		(5	)		—		—			643		(5	)
Debt Securities Issued by U.S. Government- Sponsored Enterprises		814		(10	)		49		(1	)		863		(11	)
Debt Securities Issued by Corporations		249,629		(2,846	)		64,029		(970	)		313,658		(3,816	)
Mortgage-Backed Securities:
Residential - Government Agencies		810,157		(17,131	)		41,471		(1,635	)		851,628		(18,766	)
Residential - U.S. Government-Sponsored Enterprises		1,670,500		(35,711	)		180,205		(6,536	)		1,850,705		(42,247	)
Commercial - Government Agencies		25,664		(223	)		21,810		(936	)		47,474		(1,159	)
Total Mortgage-Backed Securities		2,506,321		(53,065	)		243,486		(9,107	)		2,749,807		(62,172	)
Total	$	2,808,862	$	(56,121	)	$	317,559	$	(10,167	)	$	3,126,421	$	(66,288	)
December 31, 2020 ¹
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	21,338	$	(42	)	$	87,070	$	(549	)	$	108,408	$	(591	)
Debt Securities Issued by States and Political Subdivisions		—		—			26		(1	)		26		(1	)
Debt Securities Issued by Corporations		65,000		(853	)		50,000		(103	)		115,000		(956	)
Mortgage-Backed Securities:
Residential - Government Agencies		113,538		(222	)		28,063		(223	)		141,601		(445	)
Residential - U.S. Government-Sponsored Enterprises		94,002		(324	)		—		—			94,002		(324	)
Commercial - Government Agencies		25,075		(58	)		—		—			25,075		(58	)
Total Mortgage-Backed Securities		232,615		(604	)		28,063		(223	)		260,678		(827	)
Total	$	318,953	$	(1,499	)	$	165,159	$	(876	)	$	484,112	$	(2,375	)

Schedule of Interest Income from Taxable and Non-taxable Investment Securities

Interest income from taxable and non-taxable investment securities for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

	Year Ended December 31,
(dollars in thousands)	2021		2020		2019
Taxable	$	125,529	$	125,291	$	137,204
Non-Taxable		976		2,058		6,586
Total Interest Income from Investment Securities	$	126,505	$	127,349	$	143,790

Schedule of Carrying Value of Federal Home Loan Bank of Des Moines Stock and Federal Reserve Bank Stock

As of December 31, 2021, and December 31, 2020, the carrying value of the Company’s Federal Home Loan Bank of Des Moines (“FHLB Des Moines”) stock and Federal Reserve Bank stock was as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines Stock	$	10,000	$	12,000
Federal Reserve Bank Stock		26,624		21,340
Total	$	36,624	$	33,340

Loans and Leases and the Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2021

Loans And Leases And Allowance For Loan And Lease Losses [Abstract]

Schedule of Loan and Lease Portfolio

The Company’s loan and lease portfolio was comprised of the following as of December 31, 2021, and December 31, 2020:

	December 31,
(dollars in thousands)	2021		2020
Commercial
Commercial and Industrial	$	1,361,921	$	1,357,610
PPP ¹		126,779		517,683
Commercial Mortgage		3,152,130		2,854,829
Construction		220,254		259,798
Lease Financing		105,108		110,766
Total Commercial		4,966,192		5,100,686
Consumer
Residential Mortgage		4,309,602		4,130,513
Home Equity		1,836,588		1,604,538
Automobile		736,565		708,800
Other ²		410,129		395,483
Total Consumer		7,292,884		6,839,334
Total Loans and Leases	$	12,259,076	$	11,940,020

¹	The PPP amounts presented, which are reported net of deferred costs and fees, were previously included as a component of the Commercial and Industrial loan class.

²	Comprised of other revolving credit, installment, and lease financing.

Schedule of Activity in Allowance by Portfolio Segment

The following presents by portfolio segment, the activity in the Allowance for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

(dollars in thousands)	Commercial			Consumer			Total
For the Year Ended December 31, 2021
Allowance for Credit Losses:
Balance at Beginning of Period	$	84,847		$	131,405		$	216,252
Loans and Leases Charged-Off		(1,117	)		(16,202	)		(17,319	)
Recoveries on Loans and Leases Previously Charged-Off		506			10,848			11,354
Net Loans and Leases Recovered (Charged-Off)		(611	)		(5,354	)		(5,965	)
Provision for Credit Losses		(19,286	)		(33,180	)		(52,466	)
Balance at End of Period	$	64,950		$	92,871		$	157,821

For the Year Ended December 31, 2020
Allowance for Credit Losses:
Balance at Beginning of Period (December 31, 2019)	$	73,801		$	36,226		$	110,027
CECL Adoption (Day 1) Impact		(18,789	)		17,052			(1,737	)
Balance at Beginning of Period (January 1, 2020)		55,012			53,278			108,290
Loans and Leases Charged-Off		(1,697	)		(19,341	)		(21,038	)
Recoveries on Loans and Leases Previously Charged-Off		2,328			11,572			13,900
Net Loans and Leases Recovered (Charged-Off)		631			(7,769	)		(7,138	)
Provision for Credit Losses		29,204			85,896			115,100
Balance at End of Period	$	84,847		$	131,405		$	216,252

For the Year Ended December 31, 2019
Allowance for Credit Losses:
Balance at Beginning of Period	$	66,874		$	39,819		$	106,693
Loans and Leases Charged-Off		(2,738	)		(21,217	)		(23,955	)
Recoveries on Loans and Leases Previously Charged-Off		1,513			9,776			11,289
Net Loans and Leases Recovered (Charged-Off)		(1,225	)		(11,441	)		(12,666	)
Provision for Credit Losses		8,152			7,848			16,000
Balance at End of Period	$	73,801		$	36,226		$	110,027

Schedule of Recorded Investment in Loans and Leases by Class and Credit Quality Indicator

The following presents by credit quality indicator, loan class, and year of origination, the amortized cost basis of the Company’s loans and leases as of December 31, 2021.

		Term Loans by Origination Year
(dollars in thousands)	2021			2020		2019		2018		2017		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total Loans and Leases
December 31, 2021
Commercial
Commercial and Industrial
Pass		$	455,984	$	301,646	$	79,826	$	68,026	$	27,246	$	75,321	$	256,240	$	471	$	1,264,760
Special Mention			1,966		32,667		-		-		-		101		27,031		-		61,765
Classified			10,851		1,919		87		1,990		505		17,481		2,509		54		35,396
Total Commercial and Industrial		$	468,801	$	336,232	$	79,913	$	70,016	$	27,751	$	92,903	$	285,780	$	525	$	1,361,921
PPP
Pass		$	86,484	$	40,295	$	-	$	-	$	-	$	-	$	-	$	-	$	126,779
Total PPP		$	86,484	$	40,295	$	-	$	-	$	-	$	-	$	-	$	-	$	126,779
Commercial Mortgage
Pass		$	958,719	$	736,155	$	338,160	$	261,991	$	178,436	$	459,337	$	53,386	$	-	$	2,986,184
Special Mention			68,768		39,773		-		30,000		-		6,069		-		-		144,610
Classified			3,740		7,815		640		-		-		9,141		-		-		21,336
Total Commercial Mortgage		$	1,031,227	$	783,743	$	338,800	$	291,991	$	178,436	$	474,547	$	53,386	$	-	$	3,152,130
Construction
Pass		$	67,069	$	94,878	$	40,051	$	-	$	596	$	-	$	17,660	$	-	$	220,254
Total Construction		$	67,069	$	94,878	$	40,051	$	-	$	596	$	-	$	17,660	$	-	$	220,254
Lease Financing
Pass		$	21,637	$	15,075	$	15,697	$	9,902	$	2,004	$	39,937	$	-	$	-	$	104,252
Classified			-		-		-		856		-		-		-		-		856
Total Lease Financing		$	21,637	$	15,075	$	15,697	$	10,758	$	2,004	$	39,937	$	-	$	-	$	105,108
Total Commercial		$	1,675,218	$	1,270,223	$	474,461	$	372,765	$	208,787	$	607,387	$	356,826	$	525	$	4,966,192
Consumer
Residential Mortgage
Pass		$	1,392,337	$	1,131,330	$	367,525	$	177,215	$	255,451	$	982,306	$	-	$	-	$	4,306,164
Classified			-		-		294		-		2,279		865		-		-		3,438
Total Residential Mortgage		$	1,392,337	$	1,131,330	$	367,819	$	177,215	$	257,730	$	983,171	$	-	$	-	$	4,309,602
Home Equity
Pass		$	-	$	-	$	-	$	-	$	-	$	2,934	$	1,793,142	$	35,141	$	1,831,217
Classified			-		-		-		-		-		110		4,614		647		5,371
Total Home Equity		$	-	$	-	$	-	$	-	$	-	$	3,044	$	1,797,756	$	35,788	$	1,836,588
Automobile
Pass		$	301,285	$	152,022	$	138,887	$	91,411	$	33,268	$	18,963	$	-	$	-	$	735,836
Classified			165		85		134		137		120		88		-		-		729
Total Automobile		$	301,450	$	152,107	$	139,021	$	91,548	$	33,388	$	19,051	$	-	$	-	$	736,565
Other¹
Pass		$	172,735	$	49,769	$	92,983	$	44,489	$	16,218	$	6,444	$	25,622	$	1,444	$	409,704
Classified			39		90		183		47		27		17		22		-		425
Total Other		$	172,774	$	49,859	$	93,166	$	44,536	$	16,245	$	6,461	$	25,644	$	1,444	$	410,129
Total Consumer		$	1,866,561	$	1,333,296	$	600,006	$	313,299	$	307,363	$	1,011,727	$	1,823,400	$	37,232	$	7,292,884
Total Loans and Leases		$	3,541,779	$	2,603,519	$	1,074,467	$	686,064	$	516,150	$	1,619,114	$	2,180,226	$	37,757	$	12,259,076

¹	Comprised of other revolving credit, installment, and lease financing.

The following presents by credit quality indicator, loan class, and year of origination, the amortized cost basis of the Company’s loans and leases as of December 31, 2020.

		Term Loans by Origination Year
(dollars in thousands)	2020			2019		2018		2017		2016		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total Loans and Leases
December 31, 2020 ²
Commercial
Commercial and Industrial
Pass		$	426,780	$	149,024	$	149,468	$	49,385	$	52,354	$	68,269	$	342,339	$	847	$	1,238,466
Special Mention			11,702		42		-		-		110		95		32,319		52		44,320
Classified			32,208		1,734		2,266		777		19		19,166		18,529		125		74,824
Total Commercial and Industrial		$	470,690	$	150,800	$	151,734	$	50,162	$	52,483	$	87,530	$	393,187	$	1,024	$	1,357,610
PPP
Pass		$	517,683	$	-	$	-	$	-	$	-	$	-	$	-	$	-	$	517,683
Total PPP		$	517,683	$	-	$	-	$	-	$	-	$	-	$	-	$	-	$	517,683
Commercial Mortgage
Pass		$	847,676	$	458,472	$	350,363	$	245,157	$	267,860	$	425,157	$	76,869	$	-	$	2,671,554
Special Mention			66,523		28,418		291		7,117		8,665		5,035		-		-		116,049
Classified			49,640		655		2,783		274		4,742		9,132		-		-		67,226
Total Commercial Mortgage		$	963,839	$	487,545	$	353,437	$	252,548	$	281,267	$	439,324	$	76,869	$	-	$	2,854,829
Construction
Pass		$	106,508	$	105,731	$	11,275	$	8,133	$	-	$	-	$	28,151	$	-	$	259,798
Total Construction		$	106,508	$	105,731	$	11,275	$	8,133	$	-	$	-	$	28,151	$	-	$	259,798
Lease Financing
Pass		$	19,906	$	20,132	$	13,785	$	4,202	$	9,657	$	41,755	$	-	$	-	$	109,437
Classified			33		67		1,092		42		95		-		-		-		1,329
Total Lease Financing		$	19,939	$	20,199	$	14,877	$	4,244	$	9,752	$	41,755	$	-	$	-	$	110,766
Total Commercial		$	2,078,659	$	764,275	$	531,323	$	315,087	$	343,502	$	568,609	$	498,207	$	1,024	$	5,100,686
Consumer
Residential Mortgage
Pass		$	1,300,831	$	576,452	$	295,522	$	454,165	$	545,798	$	954,120	$	-	$	-	$	4,126,888
Classified			-		294		-		1,032		-		2,299		-		-		3,625
Total Residential Mortgage		$	1,300,831	$	576,746	$	295,522	$	455,197	$	545,798	$	956,419	$	-	$	-	$	4,130,513
Home Equity
Pass		$	-	$	-	$	-	$	-	$	-	$	4,449	$	1,556,671	$	37,559	$	1,598,679
Classified			-		-		-		-		-		88		4,693		1,078		5,859
Total Home Equity		$	-	$	-	$	-	$	-	$	-	$	4,537	$	1,561,364	$	38,637	$	1,604,538
Automobile
Pass		$	219,218	$	213,914	$	158,216	$	68,776	$	33,899	$	13,850	$	-	$	-	$	707,873
Classified			101		245		171		113		161		136		-		-		927
Total Automobile		$	219,319	$	214,159	$	158,387	$	68,889	$	34,060	$	13,986	$	-	$	-	$	708,800
Other¹
Pass		$	71,042	$	145,549	$	92,993	$	39,770	$	9,225	$	2,189	$	32,070	$	1,485	$	394,323
Classified			51		419		375		167		42		21		85		-		1,160
Total Other		$	71,093	$	145,968	$	93,368	$	39,937	$	9,267	$	2,210	$	32,155	$	1,485	$	395,483
Total Consumer		$	1,591,243	$	936,873	$	547,277	$	564,023	$	589,125	$	977,152	$	1,593,519	$	40,122	$	6,839,334
Total Loans and Leases		$	3,669,902	$	1,701,148	$	1,078,600	$	879,110	$	932,627	$	1,545,761	$	2,091,726	$	41,146	$	11,940,020

¹	Comprised of other revolving credit, installment, and lease financing.

²	Certain prior period information has been reclassified to conform to current presentations.

Schedule of Aging Analysis by Class of Loan and Lease Portfolio

The following presents by class, an aging analysis of the Company’s loan and lease portfolio as of December 31, 2021, and December 31, 2020.

(dollars in thousands)	30 - 59 Days Past Due		60 - 89 Days Past Due		Past Due 90 Days or More		Non- Accrual		Total Past Due and Non- Accrual		Current		Total Loans and Leases		Non- Accrual Loans and Leases that are Current ²
As of December 31, 2021
Commercial
Commercial and Industrial	$	2,006	$	14	$	—	$	243	$	2,263	$	1,359,658	$	1,361,921	$	151
PPP		—		—		—		—		—		126,779		126,779		—
Commercial Mortgage		—		—		—		8,205		8,205		3,143,925		3,152,130		8,205
Construction		—		—		—		—		—		220,254		220,254		—
Lease Financing		—		—		—		—		—		105,108		105,108		—
Total Commercial		2,006		14		—		8,448		10,468		4,955,724		4,966,192		8,356
Consumer
Residential Mortgage		2,046		1,263		3,159		3,305		9,773		4,299,829		4,309,602		—
Home Equity		1,791		748		3,456		4,881		10,876		1,825,712		1,836,588		1,544
Automobile		7,804		1,495		729		—		10,028		726,537		736,565		—
Other ¹		2,686		904		426		—		4,016		406,113		410,129		—
Total Consumer		14,327		4,410		7,770		8,186		34,693		7,258,191		7,292,884		1,544
Total	$	16,333	$	4,424	$	7,770	$	16,634	$	45,161	$	12,213,915	$	12,259,076	$	9,900

As of December 31, 2020
Commercial
Commercial and Industrial	$	191	$	59	$	—	$	441	$	691	$	1,356,919	$	1,357,610	$	285
PPP		—		—		—		—		—		517,683		517,683		—
Commercial Mortgage		—		—		—		8,527		8,527		2,846,302		2,854,829		4,983
Construction		—		—		—		—		—		259,798		259,798		—
Lease Financing		—		—		—		—		—		110,766		110,766		—
Total Commercial		191		59		—		8,968		9,218		5,091,468		5,100,686		5,268
Consumer
Residential Mortgage		4,049		2,083		5,274		3,223		14,629		4,115,884		4,130,513		2,100
Home Equity		3,423		3,378		3,187		3,958		13,946		1,590,592		1,604,538		987
Automobile		6,358		2,215		925		—		9,498		699,302		708,800		—
Other ¹		2,556		1,612		1,160		—		5,328		390,155		395,483		—
Total Consumer		16,386		9,288		10,546		7,181		43,401		6,795,933		6,839,334		3,087
Total	$	16,577	$	9,347	$	10,546	$	16,149	$	52,619	$	11,887,401	$	11,940,020	$	8,355

¹	Comprised of other revolving credit, installment, and lease financing.

²	Represents non-accrual loans that are not past due 30 days or more; however, full payment of principal and interest as originally structured is still not expected.

Schedule of Non-Accrual Loans and Leases

The following presents the non-accrual loans and leases as of December 31, 2021, and December 31, 2020.

	December 31, 2021						December 31, 2020
(dollars in thousands)	Non-accrual loans with a specific ACL		Non-accrual loans without a specific ACL		Total Non-accrual loans		Total Non-accrual loans
Commercial
Commercial and Industrial	$	243	$	—	$	243	$	441
Commercial Mortgage		4,661		3,544		8,205		8,527
Total Commercial		4,904		3,544		8,448		8,968
Consumer
Residential Mortgage		2,959		346		3,305		3,223
Home Equity		4,881		—		4,881		3,958
Total Consumer		7,840		346		8,186		7,181
Total	$	12,744	$	3,890	$	16,634	$	16,149

Schedule of Loans Modified in TDR and TDRs that Defaulted During the Period Within 12 months of Modification Date

The following presents by class, information related to loans modified in a TDR during the years ended December 31, 2021, and December 31, 2020.

	Loans Modified as a TDR for the Year Ended December 31, 2021						Loans Modified as a TDR for the Year Ended December 31, 2020
Troubled Debt Restructurings (dollars in thousands)	Number of Contracts		Recorded Investment (as of period end) ¹		Increase in Allowance (as of period end)		Number of Contracts		Recorded Investment (as of period end) ¹		Increase in Allowance (as of period end)
Commercial
Commercial and Industrial		7	$	251	$	4		5	$	203	$	5
Commercial Mortgage		—		—		—		1		1,046		60
Total Commercial		7		251		4		6		1,249		65
Consumer
Residential Mortgage		15		5,889		612		—		—		—
Home Equity		11		1,793		85		10		1,246		8
Automobile		341		7,130		95		352		7,541		112
Other ²		132		1,160		42		180		1,850		77
Total Consumer		499		15,972		834		542		10,637		197
Total		506	$	16,223	$	838		548	$	11,886	$	262

¹	The period end balances reflect all partial paydowns and charge-offs since the modification date. TDRs fully paid off, charged off, or foreclosed upon by period end are not included.

²	Comprised of other revolving credit and installment financing.

	Year Ended December 31, 2021				Year Ended December 31, 2020
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date (dollars in thousands)	Number of Contracts		Recorded Investment (as of period end)¹		Number of Contracts		Recorded Investment (as of period end) ¹
Commercial
Commercial and Industrial		—	$	—		1	$	27
Total Commercial		—		—		1		27
Consumer
Residential Mortgage		1		521		—		—
Home Equity		4		407		—		—
Automobile		38		644		43		723
Other ²		29		189		10		81
Total Consumer		72		1,761		53		804
Total		72	$	1,761		54	$	831

¹	The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid off, charged off, or foreclosed upon by period end are not included.

²	Comprised of other revolving credit and installment financing.

Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2021

Transfers And Servicing Of Financial Assets [Abstract]

Summary of Carrying Value Under the Fair Value Measurement Method

(dollars in thousands)	2021			2020			2019
Balance at Beginning of Year	$	958		$	1,126		$	1,290
Changes in Fair Value Due to Payoffs		(158	)		(168	)		(164	)
Balance at End of Year	$	800		$	958		$	1,126

Summary of Carrying Value Under the Amortization Method

(dollars in thousands)	2021			2020			2019
Balance at Beginning of Year	$	18,694		$	23,896		$	23,020
Servicing Rights that Resulted From Asset Transfers		4,921			3,592			4,485
Amortization		(4,227	)		(4,902	)		(3,609	)
Valuation Allowance Recovery (Provision)		2,063			(3,892	)		—
Balance at End of Year	$	21,451		$	18,694		$	23,896
Valuation Allowance:
Balance at Beginning of Year	$	(3,892	)	$	—		$	—
Valuation Allowance Recovery (Provision)		2,063			(3,892	)		—
Balance at End of Year	$	(1,829	)	$	(3,892	)	$	—
Fair Value:
Balance at Beginning of Year	$	18,694		$	25,714		$	29,218
Balance at End of Year	$	21,451		$	18,694		$	25,714

Schedule of Key Data and Assumptions Used in Estimating the Fair Value

The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of December 31, 2021, and December 31, 2020 were as follows:

	December 31,
	2021			2020
Weighted-Average Constant Prepayment Rate ¹		10.70	%	14.42		%
Weighted-Average Life (in years)		6.18			4.99
Weighted-Average Note Rate	3.62		%	3.87		%
Weighted-Average Discount Rate ²	7.04		%	5.81		%

¹	Represents annualized loan prepayment rate assumption.

²	Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities.

Schedule of Sensitivity Analysis of the Fair Value

	December 31,
(dollars in thousands)	2021			2020
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$	(252	)	$	(203	)
Decrease in fair value from 50 bps adverse change		(498	)		(401	)
Discount Rate
Decrease in fair value from 25 bps adverse change		(223	)		(184	)
Decrease in fair value from 50 bps adverse change		(441	)		(365	)

Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Components of Premises and Equipment

The components of the Company’s premises and equipment as of December 31, 2021, and December 31, 2020, were as follows:

(dollars in thousands)	Cost		Accumulated Depreciation and Amortization			Net Book Value
December 31, 2021
Premises	$	366,205	$	(226,515	)	$	139,690
Equipment		145,120		(87,649	)		57,471
Finance Leases		6,593		(4,361	)		2,232
Total	$	517,918	$	(318,525	)	$	199,393

December 31, 2020
Premises	$	370,268	$	(237,024	)	$	133,244
Equipment		143,964		(79,817	)		64,147
Finance Leases		6,593		(4,289	)		2,304
Total	$	520,825	$	(321,130	)	$	199,695

Other Assets (Tables)

12 Months Ended

Dec. 31, 2021

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Schedule of Other Assets

The components of the Company’s other assets as of December 31, 2021, and December 31, 2020, were as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines and Federal Reserve Bank Stock	$	36,624	$	33,340
Derivative Financial Instruments		42,011		96,167
Low-Income Housing and Other Equity Investments		136,647		142,961
Deferred Compensation Plan Assets		56,411		53,410
Prepaid Expenses		17,670		14,517
Accounts Receivable		13,323		12,380
Deferred Tax Assets		42,277		16,724
Other		39,764		65,794
Total Other Assets	$	384,727	$	435,293

Deposits (Tables)

12 Months Ended

Dec. 31, 2021

Deposits [Abstract]

Schedule of Time Deposits with Contractual Maturities

As of December 31, 2021, the contractual maturities of these time deposits were as follows:

(dollars in thousands)	Amount
2022	$	796,092
2023		126,884
2024		29,347
2025		7,228
2026		32,235
Thereafter		8,303
Total	$	1,000,089

As of December 31, 2021, the contractual maturities of these time deposits were as follows:

(dollars in thousands)	Amount
Three Months or Less	$	290,440
Over Three Months through Six Months		142,166
Over Six Months through Twelve Months		208,867
Over Twelve Months		116,491
Total	$	757,964

Borrowings (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Details of Short-term Borrowings

Details of the Company’s short-term borrowings (original term of one year or less) as of December 31, 2021, and December 31, 2020 were as follows:

	December 31,
(dollars in thousands)	2021		2020
Securities Sold Under Agreements to Repurchase (short-term)¹
Amounts Outstanding	$	—	$	100
Weighted-Average Interest Rate		—		1.20	%

Other Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Other Debt

The Company’s other debt as of December 31, 2021, and December 31, 2020, were as follows:

	December 31,
(dollars in thousands)	2021		2020
Federal Home Loan Bank of Des Moines Advances	$	—	$	50,000
Finance Lease Obligations		10,391		10,481
Total	$	10,391	$	60,481

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders Equity Note [Abstract]

Schedule of Minimum Required Capital Amounts and Ratios for Well Capitalized Institutions and The Actual Capital Amounts and Ratios for The Company and The Bank

(dollars in thousands)	Well Capitalized Minimum Ratio			Company			Bank
As of December 31, 2021
Common Shareholders’ Equity				$	1,436,124		$	1,586,473
Common Equity Tier 1 Capital					1,483,455			1,645,405
Tier 1 Capital					1,658,942			1,645,405
Total Capital					1,811,943			1,798,190
Common Equity Tier 1 Capital Ratio		6.5	%		12.12	%		13.47	%
Tier 1 Capital Ratio		8.0	%		13.56	%		13.47	%
Total Capital Ratio		10.0	%		14.81	%		14.72	%
Tier 1 Leverage Ratio		5.0	%		7.32	%		7.26	%

As of December 31, 2020
Common Shareholders’ Equity				$	1,374,507		$	1,290,455
Common Equity Tier 1 Capital					1,361,915			1,289,435
Tier 1 Capital					1,361,915			1,289,435
Total Capital					1,503,784			1,431,106
Common Equity Tier 1 Capital Ratio		6.5	%		12.06	%		11.43	%
Tier 1 Capital Ratio		8.0	%		12.06	%		11.43	%
Total Capital Ratio		10.0	%		13.31	%		12.69	%
Tier 1 Leverage Ratio		5.0	%		6.71	%		6.35	%

Components of Other Comprehensive Income

The following table presents the components of other comprehensive income (loss), net of tax:

(dollars in thousands)	Before Tax			Tax Effect			Net of Tax
Year Ended December 31, 2021
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	(111,084	)	$	(29,440	)	$	(81,644	)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(3,798	)		(1,007	)		(2,791	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		648			171			477
Net Unrealized Gains (Losses) on Investment Securities		(114,234	)		(30,276	)		(83,958	)
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		10,842			2,874			7,968
Amortization of Net Actuarial Losses (Gains)		2,676			709			1,967
Amortization of Prior Service Credit		(246	)		(65	)		(181	)
Defined Benefit Plans, Net		13,272			3,518			9,754
Other Comprehensive Income (Loss)	$	(100,962	)	$	(26,758	)	$	(74,204	)

Year Ended December 31, 2020
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	58,763		$	15,600		$	43,163
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(77	)		(50	)		(27	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		397			105			292
Net Unrealized Gains (Losses) on Investment Securities		59,083			15,655			43,428
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		(8,187	)		(2,170	)		(6,017	)
Amortization of Net Actuarial Losses (Gains)		2,318			614			1,704
Amortization of Prior Service Credit		(246	)		(65	)		(181	)
Defined Benefit Plans, Net		(6,115	)		(1,621	)		(4,494	)
Other Comprehensive Income (Loss)	$	52,968		$	14,034		$	38,934

Year Ended December 31, 2019
Net Unrealized Gains (Losses) on Investment Securities:
Net Unrealized Gains (Losses) Arising During the Period	$	30,169		$	8,001		$	22,168
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income:
(Gain) Loss on Sale		(152	)		(49	)		(103	)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities ¹		833			221			612
Net Unrealized Gains (Losses) on Investment Securities		30,850			8,173			22,677
Defined Benefit Plans:
Net Actuarial Gains (Losses) Arising During the Period		(5,046	)		(1,337	)		(3,709	)
Amortization of Net Actuarial Losses (Gains)		1,598			423			1,175
Amortization of Prior Service Credit		(288	)		(76	)		(212	)
Defined Benefit Plans, Net		(3,736	)		(990	)		(2,746	)
Other Comprehensive Income (Loss)	$	27,114		$	7,183		$	19,931

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax:

(dollars in thousands)	Investment Securities- Available- For-Sale			Investment Securities- Held-To- Maturities			Defined Benefit Plans			Accumulated Other Comprehensive Income (Loss)
Year Ended December 31, 2021
Balance at Beginning of Period	$	51,495		$	(423	)	$	(43,250	)	$	7,822
Other Comprehensive Income (Loss) Before Reclassifications		(81,644	)		—			7,968			(73,676	)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(2,791	)		477			1,786			(528	)
Total Other Comprehensive Income (Loss)		(84,435	)		477			9,754			(74,204	)
Balance at End of Period	$	(32,940	)	$	54		$	(33,496	)	$	(66,382	)

Year Ended December 31, 2020
Balance at Beginning of Period	$	8,359		$	(715	)	$	(38,756	)	$	(31,112	)
Other Comprehensive Income (Loss) Before Reclassifications		43,163			—			(6,017	)		37,146
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(27	)		292			1,523			1,788
Total Other Comprehensive Income (Loss)		43,136			292			(4,494	)		38,934
Balance at End of Period	$	51,495		$	(423	)	$	(43,250	)	$	7,822

Year Ended December 31, 2019
Balance at Beginning of Period	$	(10,447	)	$	(4,586	)	$	(36,010	)	$	(51,043	)
Other Comprehensive Income (Loss) Before Reclassifications		22,168			—			(3,709	)		18,459
Cumulative Effect of ASU 2019-04		(3,259	)		3,259			—			—
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(103	)		612			963			1,472
Total Other Comprehensive Income (Loss)		18,806			3,871			(2,746	)		19,931
Balance at End of Period	$	8,359		$	(715	)	$	(38,756	)	$	(31,112	)

Reclassification out of Accumulated Other Comprehensive Income

The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss):

Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified from Accumulated Other Comprehensive Income (Loss)¹									Affected Line Item in the Statement Where Net Income Is Presented
(dollars in thousands)	Year Ended December 31,
	2021			2020			2019
Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity	$	(648	)	$	(397	)	$	(833	)	Interest Income
		171			105			221		Provision for Income Tax
		(477	)		(292	)		(612	)	Net of Tax
Sales of Investment Securities Available-for-Sale		3,798			77			152		Investment Securities Gains (Losses), Net
		(1,007	)		(50	)		(49	)	Provision for Income Tax
		2,791			27			103		Net of Tax

Amortization of Defined Benefit Plans Items
Prior Service Credit ²		246			246			288
Net Actuarial Losses ²		(2,676	)		(2,318	)		(1,598	)
		(2,430	)		(2,072	)		(1,310	)	Total Before Tax
		644			549			347		Provision for Income Tax
		(1,786	)		(1,523	)		(963	)	Net of Tax

Total Reclassifications for the Period	$	528		$	(1,788	)	$	(1,472	)	Net of Tax

¹	^{Amounts in parentheses indicate reductions to net income.}

²	^{These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost and are included in Other Noninterest Expense on the consolidated statements of income (see Note 14 Pension Plans and Postretirement Benefit Plan for additional details).}

Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of Reconciliation of Weighted Average Number of Common Shares Used in the Calculation of Basic and Diluted Earnings Per Common Share and Antidilutive Stock Options and Restricted Stock Outstanding


(dollars in thousands, except shares and per share amounts)	2021		2020		2019
Numerator:
Net Income Available to Common Shareholders	$	250,397	$	153,804	$	225,913

Denominator:
Weighted Average Common Shares Outstanding - Basic		39,837,798		39,726,210		40,384,328
Dilutive Effect of Equity Based Awards		215,866		165,897		265,242
Weighted Average Common Shares Outstanding - Diluted		40,053,664		39,892,107		40,649,570

Earnings Per Common Share:
Basic	$	6.29	$	3.87	$	5.59
Diluted	$	6.25	$	3.86	$	5.56

Antidilutive Stock Options and Restricted Stock Outstanding		41,802		113,410		4,905

Business Segments (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Selected Business Segment Financial Information

Selected business segment financial information as of and for the years ended December 31, 2021, December 31, 2020, and December 31, 2019 were as follows:

(dollars in thousands)	Consumer Banking			Commercial Banking			Treasury and Other			Consolidated Total
Year Ended December 31, 2021
Net Interest Income	$	283,998		$	194,409		$	18,883		$	497,290
Provision for Credit Losses		5,764			201			(56,465	)		(50,500	)
Net Interest Income After Provision for Credit Losses		278,234			194,208			75,348			547,790
Noninterest Income		131,292			30,637			9,424			171,353
Noninterest Expense		(303,699	)		(64,470	)		(25,420	)		(393,589	)
Income Before Income Taxes		105,827			160,375			59,352			325,554
Provision for Income Taxes		(26,442	)		(39,070	)		(6,670	)		(72,182	)
Net Income	$	79,385		$	121,305		$	52,682		$	253,372
Total Assets as of December 31, 2021	$	7,675,823		$	5,107,001		$	10,002,117		$	22,784,941

Year Ended December 31, 2020
Net Interest Income	$	292,710		$	188,626		$	14,986		$	496,322
Provision for Credit Losses		8,087			(948	)		110,661			117,800
Net Interest Income (Loss) After Provision for Credit Losses		284,623			189,574			(95,675	)		378,522
Noninterest Income		128,400			34,523			21,486			184,409
Noninterest Expense		(289,177	)		(63,294	)		(21,336	)		(373,807	)
Income (Loss) Before Income Taxes		123,846			160,803			(95,525	)		189,124
Provision for Income Taxes		(31,476	)		(40,081	)		36,237			(35,320	)
Net Income (Loss)	$	92,370		$	120,722		$	(59,288	)	$	153,804
Total Assets as of December 31, 2020	$	7,478,813		$	5,116,807		$	8,008,031		$	20,603,651

Year Ended December 31, 2019¹
Net Interest Income	$	305,803		$	185,259		$	6,653		$	497,715
Provision for Credit Losses		11,685			976			3,339			16,000
Net Interest Income After Provision for Credit Losses		294,118			184,283			3,314			481,715
Noninterest Income		142,378			33,362			7,598			183,338
Noninterest Expense		(281,662	)		(84,616	)		(12,949	)		(379,227	)
Income (Loss) Before Provision for Income Taxes		154,834			133,029			(2,037	)		285,826
Provision for Income Taxes		(38,654	)		(28,852	)		7,593			(59,913	)
Net Income	$	116,180		$	104,177		$	5,556		$	225,913
Total Assets as of December 31, 2019¹	$	7,054,511		$	4,254,261		$	6,786,724		$	18,095,496

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Schedule of Reconciliation of Changes in Benefit Obligation and Fair value of Plan Assets As Well As the Funded Status Recognized in the Consolidated Statements

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2021			2020			2021			2020
Benefit Obligation at Beginning of Year	$	117,647		$	110,637		$	31,507		$	27,571
Service Cost		—			—			678			578
Interest Cost		2,924			3,627			816			945
Actuarial Losses (Gains)		(2,817	)		10,364			(2,514	)		3,559
Employer Benefits Paid ¹		(7,169	)		(6,981	)		(1,217	)		(1,146	)
Benefit Obligation at End of Year	$	110,585		$	117,647		$	29,270		$	31,507
Fair Value of Plan Assets at Beginning of Year	$	97,890		$	93,638		$	—		$	—
Actual Return on Plan Assets		10,103			10,764			—			—
Employer Contributions		470			469			1,217			1,146
Employer Benefits Paid ¹		(7,169	)		(6,981	)		(1,217	)		(1,146	)
Fair Value of Plan Assets at End of Year	$	101,294		$	97,890		$	—		$	—
Funded Status at End of Year ²	$	(9,291	)	$	(19,757	)	$	(29,270	)	$	(31,507	)

¹	Participants' contributions relative to the postretirement benefit plan were offset against employer benefits paid in the table above. Participants' contributions for postretirement benefits were $0.8 million for the years ended December 31, 2021, and December 31, 2020.

²	^{Amounts are recognized in Retirement Benefits Payable in the consolidated statements of condition.}

Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss)

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2021			2020			2021		2020
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax
Net Actuarial Gains (Losses)	$	(35,014	)	$	(43,101	)	$	235	$	(1,613	)
Net Prior Service Credit		—			—			1,283		1,464
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax	$	(35,014	)	$	(43,101	)	$	1,518	$	(149	)

Schedule of Components of Net Periodic Benefit Cost

	Pension Benefits									Postretirement Benefits
(dollars in thousands)	2021			2020			2019			2021			2020			2019
Service Cost	$	—		$	—		$	—		$	678		$	578		$	455
Interest Cost		2,924			3,627			4,401			816			945			1,025
Expected Return on Plan Assets		(4,592	)		(5,028	)		(4,993	)		—			—			—
Amortization of:
Prior Service Credit ¹		—			—			—			(246	)		(246	)		(288	)
Net Actuarial Losses (Gains) ¹		2,676			2,318			1,937			—			—			(339	)
Net Periodic Benefit Cost	$	1,008		$	917		$	1,345		$	1,248		$	1,277		$	853

¹	Represents reclassification adjustments from accumulated other comprehensive income during the period.

Schedule of Assumptions Used to Determine the Benefit Obligations/net Periodic Cost

Assumptions used to determine the benefit obligations as of December 31, 2021, and December 31, 2020, for the Company’s Pension Plans and postretirement benefit plan were as follows:

	Pension Benefits						Postretirement Benefits
	2021			2020			2021			2020
Weighted Average Assumptions as of December 31:
Discount Rate		2.89	%		2.55	%		3.00	%		2.66	%
Health Care Cost Trend Rate Assumed For Next Year		—			—			5.70	%		5.50	%

Schedule of Assumptions Used in Calculation Net Periodic Benefit Cost

	Pension Benefits									Postretirement Benefits
	2021			2020			2019			2021			2020			2019
Weighted Average Assumptions as of December 31:
Discount Rate		2.55	%		3.36	%		4.41	%		2.66	%		3.42	%		4.48	%
Expected Long-Term Rate of Return on Plan Assets		5.25	%		5.75	%		5.75	%		—			—			—
Health Care Cost Trend Rate		—			—			—			5.50	%		5.70	%		6.00	%

Schedule of Expected Benefits to be Paid in Each of the Next Five Years and in the Aggregate for the Five Years Thereafter

As of December 31, 2021, expected benefits to be paid in each of the next five years and in the aggregate for the five years thereafter were as follows:

(dollars in thousands)	Pension Benefits		Postretirement Benefits
2022	$	7,387	$	1,375
2023		7,417		1,423
2024		7,399		1,456
2025		7,367		1,512
2026		7,297		1,549
Years 2027-2031		34,473		8,362

Schedule of the Fair Values of the Retirement Plan Assets by Asset Category

The fair values of the Retirement Plan assets as of December 31, 2021, and December 31, 2020, by asset category were as follows:

	Fair Value Measurements
Asset Category (dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total as of Dec. 31, 2021		Total as of Dec. 31, 2020
Cash	$	618	$	—	$	—	$	618	$	1,079
Equity Securities – Mutual Funds:
Large-Cap		511		—		—		511		1,849
Mixed-Cap		33,108		—		—		33,108		29,802
International		29,022		—		—		29,022		28,055
Emerging Market		1,786		—		—		1,786		2,494
Fixed Income Securities – Mutual Funds		36,249		—		—		36,249		34,611
Total	$	101,294	$	—	$	—	$	101,294	$	97,890

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Compensation Expense and Related Income Tax Benefit Recognized for All Share-Based Awards

For the years ended December 31, 2021, December 31, 2020, and December 31, 2019, compensation expense and the related income tax benefit recognized for stock options and restricted stock were as follows:

(dollars in thousands)	2021		2020		2019
Compensation Expense	$	13,267	$	7,578	$	8,338
Income Tax Benefit		3,520		2,009	2,210

Schedule of Activity for Restricted Stock

The following table presents the activity for restricted stock:

	Number of Shares			Weighted Average Grant Date Fair Value		Grant Date Fair Value of Restricted Stock that Vested During the Year (in thousands)
Unvested as of December 31, 2018		314,487		$	78.17
Granted		130,093			82.82
Vested		(107,759	)		66.46	$	8,910
Forfeited		(26,872	)		83.34
Unvested as of December 31, 2019		309,949		$	83.75
Granted		161,168			80.97
Vested		(99,894	)		84.69	$	8,544
Forfeited		(42,454	)		84.36
Unvested as of December 31, 2020		328,769		$	82.02
Granted		292,007			90.23
Vested		(97,278	)		78.55	$	8,673
Forfeited		(22,962	)		86.48
Unvested as of December 31, 2021 ¹		500,536		$	87.28

¹ As of December 31, 2021, 138,872 shares were unvested from service-based grants.

Schedule of Activity for Restricted Stock Units

The following table presents the activity for RSUs:

	Number of Units			Weighted Average Grant Date Fair Value		Fair Value of Restricted Stock Unit that Vested During the Year (in thousands)
Balance as of December 31, 2018		52,064		$	63.92
Vested		(52,064	)		82.23	$	4,311
Balance as of December 31, 2019		—		$	—

Schedule of Activity Related to Stock Options

The following table presents the activity related to stock options under all plans for the year ended December 31, 2021:

	Stock Options				Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)			Aggregate Intrinsic Value (in thousands)
Stock Options Outstanding as of January 1, 2021		184,054			$	45.28
Exercised		(165,920	)			45.04
Expired		(833	)			42.22
Stock Options Outstanding as of December 31, 2021		17,301		47.72				0.1		$	624
Stock Options Vested and Exercisable as of December 31, 2021		17,301		47.72				0.1	624

Summary of Certain Stock Option Activity

The following summarizes certain stock option activity of the Company for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

(dollars in thousands)	2021		2020		2019
Intrinsic Value of Stock Options Exercised	$	6,755	$	2,261	$	1,106
Cash Received from Stock Options Exercised		7,473		2,438		1,473
Tax Benefits Realized from Stock Options Exercised		1,611		485		727

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of the Company's Provision for Income Taxes

The components of the Company’s provision for income taxes for the years ended December 31, 2021, December 31, 2020, and December 31, 2019, were as follows:

(dollars in thousands)	2021		2020			2019
Current:
Federal	$	58,652	$	65,840		$	60,902
State		10,510		12,066			14,426
Total Current		69,162		77,906			75,328
Deferred:
Federal		2,254		(31,783	)		(9,630	)
State		766		(10,803	)		(5,785	)
Total Deferred		3,020		(42,586	)		(15,415	)
Provision for Income Taxes	$	72,182	$	35,320		$	59,913

Schedule of Significant Components of the Company's Deferred Tax Liabilities and Assets

As of December 31, 2021, and December 31, 2020, significant components of the Company’s deferred tax liabilities and assets were as follows:

	December 31,
(dollars in thousands)	2021			2020
Deferred Tax Liabilities:
Accelerated Depreciation	$	(8,131	)	$	(8,042	)
Accrued Pension Cost		(11,270	)		(11,270	)
Federal Home Loan Bank of Des Moines Stock		(2,885	)		(3,416	)
Lease Transactions		(37,585	)		(41,726	)
Operating Lease Liabilities		(25,348	)		(26,387	)
Energy Tax Credits		—			(674	)
Net Unrealized Gains on Investments Securities		—			(18,407	)
Investment in Variable Interest Entities		(1,657	)		(2,725	)
Deferred Loan Fees		(3,845	)		(4,736	)
Originated Mortgage Servicing Rights		(6,068	)		(5,579	)
Other		(915	)		(1,124	)
Gross Deferred Tax Liabilities		(97,704	)		(124,086	)
Deferred Tax Assets:
Allowance for Credit Losses		43,348			57,840
Minimum Pension Liability		12,082			13,430
Accrued Expenses		22,416			17,629
Postretirement Benefit Obligations		7,170			7,980
Capital Lease Expenses		2,163			2,168
Operating Lease Right-of-Use Assets		27,360			28,473
Restricted Stock		4,442			3,669
Net Unrealized Losses on Investments Securities		11,868			—
Deductible State and Local Taxes		3,239			3,366
Low Income Housing Investments		3,007			3,648
Other		6,089			6,204
Gross Deferred Tax Assets Before Valuation Allowance		143,184			144,407
Valuation Allowance		(3,203	)		(3,597	)
Gross Deferred Tax Assets After Valuation Allowance		139,981			140,810
Net Deferred Tax Assets	$	42,277		$	16,724

Schedule of Reconciliation of the Statutory Federal Income Tax Rate to the Company's Effective Tax Rate

The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

	2021			2020			2019
Statutory Federal Income Tax Rate		21.00	%		21.00	%		21.00	%
Increase (Decrease) in Income Tax Rate Resulting From:
State Taxes, Net of Federal Income Tax		2.85			0.81			2.53
Low-Income Housing Investments		0.77			0.82			0.60
Investment Tax Credits		(0.35	)		(1.24	)		(0.84	)
Bank-Owned Life Insurance		(0.48	)		(0.82	)		(0.51	)
Tax-Exempt Income		(0.24	)		(0.50	)		(0.53	)
Leveraged Lease		(0.10	)		(0.56	)		(1.54	)
Other		(1.28	)		(0.83	)		0.25
Effective Tax Rate		22.17	%		18.68	%		20.96	%

Schedule of Reconciliation of the Company's Liability for Unrecognized Tax Benefits

The following presents a reconciliation of the Company’s liability for UTBs for the years ended December 31, 2021, December 31, 2020, and December 31, 2019:

(dollars in thousands)	2021			2020			2019
Unrecognized Tax Benefits at Beginning of Year	$	5,403		$	6,120		$	5,541
Gross Increases, Related to Tax Positions Taken in a Prior Period		261			374			673
Gross Decreases, Related to Tax Positions Taken in a Prior Period		(1,285	)		—			—
Gross Increases, Related to Current Period Tax Positions		234			222			715
Lapse of Statute of Limitations		(598	)		(1,313	)		(809	)
Unrecognized Tax Benefits at End of Year	$	4,015		$	5,403		$	6,120

Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Schedule of the Notional Amount and Fair Value of the Derivative Financial Instruments

The notional amount and fair value of the Company’s derivative financial instruments as of December 31, 2021, and December 31, 2020, were as follows:

	December 31, 2021					December 31, 2020
(dollars in thousands)	Notional Amount		Fair Value			Notional Amount		Fair Value
Interest Rate Lock Commitments	$	45,857	$	1,084		$	102,881	$	4,947
Forward Commitments		58,523		(35	)		158,759		(740	)
Interest Rate Swap Agreements
Receive Fixed/Pay Variable Swaps		1,400,322		28,742			1,362,778		90,130
Pay Fixed/Receive Variable Swaps		1,400,322		(5,922	)		1,362,778		(17,197	)
Foreign Exchange Contracts		102,548		(674	)		90,587		866
Conversion Rate Swap Agreement		131,672		—			133,286		—

Derivative Financial Instruments, their Fair Values, and Balance Sheet Location

	December 31, 2021				December 31, 2020
Derivative Financial Instruments Not Designated as Hedging Instruments ¹ (dollars in thousands)	Asset Derivatives		Liability Derivatives		Asset Derivatives		Liability Derivatives
Interest Rate Lock Commitments	$	1,084	$	—	$	4,947	$	—
Forward Commitments		17		52		—		740
Interest Rate Swap Agreements		40,733		17,913		90,342		17,409
Foreign Exchange Contracts		177		851		878		12
Total	$	42,011	$	18,816	$	96,167	$	18,161

¹	Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the consolidated statements of condition.

Derivative Financial Instruments and the Amount and Location of the Net Gains or Losses Recognized in the Statements of Income

	Location of Net Gains	Year Ended December 31,
Derivative Financial Instruments Not Designated as Hedging Instruments (dollars in thousands)	(Losses) Recognized in the Statements of Income	2021		2020			2019
Interest Rate Lock Commitments	Mortgage Banking	$	8,771	$	22,348		$	12,185
Forward Commitments	Mortgage Banking		1,580		(4,274	)		(2,340	)
Interest Rate Swap Agreements	Other Noninterest Income		6,579		15,468			7,172
Foreign Exchange Contracts	Other Noninterest Income		1,462		1,940			2,891
Conversion Rate Swap Agreement	Investment Securities Gains (Losses), Net		—		—			(453	)
Total		$	18,392	$	35,482		$	19,455

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41620-113959

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41638-113959

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41678-113959

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41641-113959

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579240-113959

+ Details

Affordable Housing Projects Tax Credit Partnerships (Tables)

12 Months Ended

Dec. 31, 2021

Equity Method Investments And Joint Ventures [Abstract]

Expected Payments for Unfunded Affordable Housing Commitments

As of December 31, 2021, the expected payments for unfunded affordable housing commitments were as follows:

(dollars in thousands)	Amount
2022	$	7,553
2023		811
2024		21,432
2025		756
2026		81
Thereafter		13,332
Total Unfunded Commitments	$	43,965

Schedule of Tax Credits and Other Tax Benefits Recognized and Amortization Expense Related to Affordable Housing

(dollars in thousands)	2021		2020		2019
Effective Yield Method
Tax credits and other tax benefits recognized	$	8,604	$	11,752	$	11,719
Amortization Expense in Provision for Income Taxes		6,700		8,586		7,566

Proportional Amortization Method
Tax credits and other tax benefits recognized	$	10,831	$	6,633	$	3,014
Amortization Expense in Provision for Income Taxes		9,375		5,729		2,578

Securities Sold Under Agreements to Repurchase (Tables)

12 Months Ended

Dec. 31, 2021

Securities Sold Under Agreements To Repurchase [Abstract]

Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged

	Remaining Contractual Maturity of Repurchase Agreements
(dollars in thousands)	Up to 90 days		91-365 days		1-3 Years		After 3 Years		Total
December 31, 2021
Class of Collateral Pledged:
Debt Securities Issued by States and Political Subdivisions	$	—	$	—	$	—	$	490	$	490
Mortgage-Backed Securities:
Residential - Government Agencies		—		—		38,685		13,407		52,092
Residential - U.S. Government-Sponsored Enterprises		—		—		236,315		161,593		397,908
Total	$	—	$	—	$	275,000	$	175,490	$	450,490

December 31, 2020
Class of Collateral Pledged:
Debt Securities Issued by States and Political Subdivisions	$	100	$	—	$	—	$	490	$	590
Mortgage-Backed Securities: ¹
Residential - Government Agencies		—		—		20,210		83,599		103,809
Residential - U.S. Government-Sponsored Enterprises		—		—		4,790		491,401		496,191
Total	$	100	$	—	$	25,000	$	575,490	$	600,590

¹ The class of collateral pledged as of December 31, 2020, have been updated to properly reflect the remaining contractual maturity of repurchase agreements.

Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements

	(i)		(ii)		(iii) = (i)-(ii)		(iv)				(v) = (iii)- (iv)
							Gross Amounts Not Offset in the Statements of Condition
(dollars in thousands)	Gross Amounts Recognized in the Statements of Condition		Gross Amounts Offset in the Statements of Condition		Net Amounts Presented in the Statements of Condition		Netting Adjustments per Master Netting Arrangements		Fair Value of Collateral Pledged ¹		Net Amount
December 31, 2021
Assets:
Interest Rate Swap Agreements:
Institutional Counterparties	$	26	$	—	$	26	$	26	$	—	$	—

Liabilities:
Interest Rate Swap Agreements:
Institutional Counterparties		5,948		—		5,948		26		5,922		—

Repurchase Agreements:
Private Institutions		450,000		—		450,000		—		450,000		—
Government Entities		490		—		490		—		490		—
Total Repurchase Agreements	$	450,490	$	—	$	450,490	$	—	$	450,490	$	—

December 31, 2020
Assets:
Interest Rate Swap Agreements:
Institutional Counterparties	$	5	$	—	$	5	$	5	$	—	$	—

Liabilities:
Interest Rate Swap Agreements:
Institutional Counterparties		17,202		—		17,202		5		7,911		9,286

Repurchase Agreements:
Private Institutions		600,000		—		600,000		—		600,000		—
Government Entities		590		—		590		—		590		—
Total Repurchase Agreements	$	600,590	$	—	$	600,590	$	—	$	600,590	$	—

Commitments, Contingencies, and Guarantees (Tables)

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Credit Commitments

The Company’s credit commitments as of December 31, 2021, were as follows:

(dollars in thousands)	December 31, 2021
Unfunded Commitments to Extend Credit	$	2,982,673
Standby Letters of Credit		135,167
Commercial Letters of Credit		18,956
Total	$	3,136,796

Fair Value of Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below presents the balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2021, and December 31, 2020:

(dollars in thousands)	Quoted Prices In Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
December 31, 2021
Assets:
Investment Securities Available-for-Sale
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	114,845	$	135,242	$	—	$	250,087
Debt Securities Issued by States and Political Subdivisions		—		75,818		—		75,818
Debt Securities Issued by U.S. Government-Sponsored Enterprises		—		1,780		—		1,780
Debt Securities Issued by Corporations		—		383,113		—		383,113
Mortgage-Backed Securities:
Residential - Government Agencies		—		1,319,042		—		1,319,042
Residential - U.S. Government-Sponsored Enterprises		—		2,090,326		—		2,090,326
Commercial - Government Agencies		—		155,890		—		155,890
Total Mortgage-Backed Securities		—		3,565,258		—		3,565,258
Total Investment Securities Available-for-Sale		114,845		4,161,211		—		4,276,056
Loans Held for Sale		—		26,746		—		26,746
Mortgage Servicing Rights		—		—		800		800
Other Assets		56,411		—		—		56,411
Derivatives ¹		—		194		41,817		42,011
Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2021	$	171,256	$	4,188,151	$	42,617	$	4,402,024
Liabilities:
Derivatives¹	$	—	$	903	$	17,913	$	18,816
Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2021	$	—	$	903	$	17,913	$	18,816
December 31, 2020
Assets:
Investment Securities Available-for-Sale
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	921	$	173,324	$	—	$	174,245
Debt Securities Issued by States and Political Subdivisions		—		24,840		—		24,840
Debt Securities Issued by U.S. Government-Sponsored Enterprises		—		1,062		—		1,062
Debt Securities Issued by Corporations		—		224,605		—		224,605
Mortgage-Backed Securities:
Residential - Government Agencies		—		1,594,815		—		1,594,815
Residential - U.S. Government-Sponsored Enterprises		—		1,518,283		—		1,518,283
Commercial - Government Agencies		—		253,839		—		253,839
Total Mortgage-Backed Securities		—		3,366,937		—		3,366,937
Total Investment Securities Available-for-Sale		921		3,790,768		—		3,791,689
Loans Held for Sale		—		82,565		—		82,565
Mortgage Servicing Rights		—		—		958		958
Other Assets		53,410		—		—		53,410
Derivatives¹		—		878		95,289		96,167
Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2020	$	54,331	$	3,874,211	$	96,247	$	4,024,789
Liabilities:
Derivatives ¹	$	—	$	752	$	17,409	$	18,161
Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2020	$	—	$	752	$	17,409	$	18,161

¹	The fair value of each class of derivatives is shown in Note 17 Derivative Financial Instruments.

Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis

For the years ended December 31, 2021, and December 31, 2020, the changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:

(dollars in thousands)	Mortgage Servicing Rights ¹			Net Derivative Assets and Liabilities ²
Year Ended December 31, 2021
Balance as of January 1, 2021	$	958		$	77,880
Realized and Unrealized Net Gains (Losses):
Included in Net Income		(158	)		8,848
Transfers to Loans Held for Sale		—			(12,634	)
Variation Margin Payments		—			(50,190	)
Balance as of December 31, 2021	$	800		$	23,904
Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of December 31, 2021	$	—		$	23,904

Year Ended December 31, 2020
Balance as of January 1, 2020	$	1,126		$	22,573
Realized and Unrealized Net Gains (Losses):
Included in Net Income		(168	)		22,219
Transfers to Loans Held for Sale		—			(18,681	)
Variation Margin Payments		—			51,769
Balance as of December 31, 2020	$	958		$	77,880
Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of December 31, 2020	$	—		$	77,880

¹	Realized and unrealized gains and losses related to mortgage servicing rights are reported as a component of mortgage banking income in the Company’s consolidated statements of income.

Summary of the Significant Unobservable Inputs

		December 31, 2021												December 31, 2020
(dollars in thousands)	Valuation Technique	Description	Range						Weighted Average¹			Fair Value		Weighted Average¹			Fair Value
Mortgage Servicing Rights	Discounted Cash Flow	Constant Prepayment Rate		6.51	%	-	11.48	%		10.70	%	$	22,251		14.42	%	$	19,652
		Discount Rate		6.49	%	-	7.08	%		7.04	%				5.81	%

Net Derivative Assets and Liabilities:
Interest Rate Lock Commitments	Pricing Model	Closing Ratio		75.40	%	-	100.00	%		90.47	%	$	1,084		90.76	%	$	4,947
Interest Rate Swap Agreements	Discounted Cash Flow	Credit Factor		0.00	%	-	0.49	%		0.14	%	$	22,820		0.29	%	$	72,933

Schedule of Assets Measured at Fair Value on Nonrecurring Basis

(dollars in thousands)	Fair Value Hierarchy	Net Carrying Amount		Valuation Allowance
December 31, 2021
Mortgage Servicing Rights - amortization method	Level 3	$	21,451	$	(1,829	)

December 31, 2020
Mortgage Servicing Rights - amortization method	Level 3	$	18,694	$	(3,892	)

Schedule of Difference between Aggregate Fair Value and Aggregate Unpaid Principal Balance

(dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Aggregate Unpaid Principal
December 31, 2021
Loans Held for Sale	$	26,746	$	26,309	$	437

December 31, 2020
Loans Held for Sale	$	82,565	$	78,577	$	3,988

Schedule of Carrying Amount, Fair Value, and Fair Value Hierarchy of Financial Instruments

					Fair Value Measurements
(dollars in thousands)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2021
Financial Instruments – Assets
Investment Securities Held-to-Maturity	$	4,694,780	$	4,646,619	$	131,139	$	4,515,480	$	—
Loans		11,921,869		12,094,631		—		—		12,094,631

Financial Instruments – Liabilities
Time Deposits		1,000,089		998,134		—		998,134		—
Securities Sold Under Agreements to Repurchase		450,490		469,293		—		469,293		—

December 31, 2020
Financial Instruments – Assets
Investment Securities Held-to-Maturity	$	3,262,727	$	3,348,693	$	7,500	$	3,341,193	$	—
Loans		11,536,011		12,019,151		—		—		12,019,151

Financial Instruments – Liabilities
Time Deposits		1,662,063		1,667,774		—		1,667,774		—
Securities Sold Under Agreements to Repurchase		600,590		649,039		—		649,039		—
Other Debt ¹		50,000		51,546		—		51,546		—

¹	Excludes finance lease obligations.

Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Summary of Noninterest Income Segregated by Revenue Streams In-Scope and Out-of-Scope of Topic 606

The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2021, December 31, 2020, and December 31, 2019.

	Year Ended December 31,
(dollars in thousands)	2021		2020		2019
Noninterest Income
In-scope of Topic 606:
Trust and Asset Management	$	46,068	$	43,456	$	44,233
Service Charges on Deposit Accounts		12,181		11,715		13,042
Fees, Exchange, and Other Service Charges		41,962		36,005		46,381
Annuity and Insurance		3,130		3,249		6,813
Other		8,684		8,626		9,633
Noninterest Income (in-scope of Topic 606)		112,025		103,051		120,102
Noninterest Income (out-of-scope of Topic 606)		59,328		81,358		63,236
Total Noninterest Income	$	171,353	$	184,409	$	183,338

Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Schedule of Right-of-Use Assets and Lease Liabilities

(dollars in thousands)		December 31, 2021		December 31, 2020
Lease Right-of-Use Assets	Classification
Operating lease right-of-use assets	Operating Lease Right-of-Use Assets	$	95,621	$	99,542
Finance lease right-of-use assets	Premises and Equipment, Net		2,232		2,304
Total Lease Right-of-Use Assets		$	97,853	$	101,846

Lease Liabilities
Operating lease liabilities	Operating Lease Liabilities	$	103,210	$	107,412
Finance lease liabilities	Other Debt		10,391		10,481
Total Lease Liabilities		$	113,601	$	117,893

Schedule of Lease Cost and Other Information

For the Company’s only finance lease, the Company utilized its incremental borrowing rate at lease inception.

	December 31, 2021			December 31, 2020
Weighted-Average Remaining Lease Term
Operating leases	16.4 years			17.0 years
Finance leases	31.0 years			32.0 years
Weighted-Average Discount Rate
Operating leases		3.57	%		3.61	%
Finance leases		7.04	%		7.04	%

(dollars in thousands)	2021			2020
Lease Costs
Operating lease cost	$	11,493		$	12,281
Variable lease cost		2,954			5,549
Short-term lease cost		407			587
Interest on lease liabilities ¹		735			741
Amortization of right-of-use assets		72			72
Sublease income		(7,452	)		(7,804	)
Net Lease Costs	$	8,209		$	11,426

Other Information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	13,741		$	12,349
Operating cash flows from finance leases		735			741
Financing cash flows from finance leases		90			84
Right-of-use assets obtained in exchange for new operating lease liabilities		12,207			11,185

¹	Included in other debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in net occupancy expense.

Future Minimum Payments for Finance Leases and Operating Leases

Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of December 31, 2021, were as follows:

(dollars in thousands)	Finance Leases			Operating Leases
2022	$	825		$	11,100
2023		825			10,298
2024		825			9,430
2025		825			8,852
2026		825			7,618
Thereafter		21,455			92,849
Total Future Minimum Lease Payments		25,580			140,147
Amounts Representing Interest		(15,189	)		(36,937	)
Present Value of Net Future Minimum Lease Payments	$	10,391		$	103,210

Future Minimum Rental Income under Operating Leases Including Subleases

Future minimum rental income under operating leases, including subleases, as of December 31, 2021, were as follows:

(dollars in thousands)	Minimum Rental Income
2022	$	5,807
2023		4,382
2024		2,829
2025		1,919
2026		1,232
Thereafter		3,635
Total	$	19,804

Bank of Hawaii Corporation Financial Statements (Tables)

12 Months Ended

Dec. 31, 2021

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

Schedule of Condensed Statements of Income

Condensed Statements of Comprehensive Income

	Year Ended December 31,
(dollars in thousands)	2021			2020			2019
Income
Dividends from Bank of Hawaii	$	62,000		$	134,000		$	220,000
Investment Securities Gains (Losses), Net		(948	)		13,336			(850	)
Other Income and Interest on Investment		6			154			261
Total Income		61,058			147,490			219,411
Noninterest Expense
Intercompany Salaries and Services		764			758			768
Other Expenses		1,787			1,864			1,682
Total Noninterest Expense		2,551			2,622			2,450
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries		58,507			144,868			216,961
Income Tax Benefit (Expense)		2,131			(2,395	)		1,818
Equity in Undistributed Income of Subsidiaries		192,734			11,331			7,134
Net Income	$	253,372		$	153,804		$	225,913
Comprehensive Income	$	179,168		$	192,738		$	245,844

Schedule of Condensed Statements of Condition

Condensed Statements of Condition

(dollars in thousands)	December 31, 2021		December 31, 2020
Assets
Cash with Bank of Hawaii	$	6,376	$	66,704
Investment Securities Held-to-Maturity		2,500		2,501
Goodwill		14,129		14,129
Other Assets		14,130		12,305
Equity in Net Assets of Subsidiaries		1,586,473		1,290,455
Total Assets	$	1,623,608	$	1,386,094

Liabilities
Income Taxes Payable	$	38	$	974
Other Liabilities		11,959		10,613
Total Liabilities		11,997		11,587
Shareholders' Equity		1,611,611		1,374,507
Total Liabilities and Shareholders' Equity	$	1,623,608	$	1,386,094

Schedule of Condensed Statements of Cash Flows

Condensed Statements of Cash Flows

	Year Ended December 31,
(dollars in thousands)	2021			2020			2019
Operating Activities
Net Income	$	253,372		$	153,804		$	225,913
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Share-Based Compensation		779			795			760
Net (Gains) Losses on Sales of Investment Securities		948			(13,336	)		850
Equity in Undistributed Income of Subsidiaries		(192,734	)		(11,331	)		(7,134	)
Net Change in Other Assets and Other Liabilities		(977	)		(68	)		(135	)
Net Cash Provided by Operating Activities		61,388			129,864			220,254

Investing Activities
Capital Contributions to the Bank		(165,000	)		—			—
Proceeds from (Expenses related to) Sales of Investment Securities		(948	)		18,336			4,259
Purchase of Investment Securities Held-to-Maturity		—			(2,501	)		(4,933	)
Net Cash Provided by (Used in) Investing Activities		(165,948	)		15,835			(674	)

Financing Activities
Proceeds from Issuance of Common Stock		13,611			9,389			7,872
Proceeds from Issuance of Preferred Stock		175,487			—			—
Repurchase of Common Stock		(31,258	)		(18,006	)		(137,649	)
Cash Dividends Paid Common Stock		(110,633	)		(107,434	)		(105,478	)
Cash Dividends Paid Preferred Stock		(2,975	)		—			—
Net Cash Provided by (Used in) Financing Activities		44,232			(116,051	)		(235,255	)

Net Change in Cash and Cash Equivalents		(60,328	)		29,648			(15,675	)
Cash and Cash Equivalents at Beginning of Period		66,704			37,056			52,731
Cash and Cash Equivalents at End of Period	$	6,376		$	66,704		$	37,056

Summary of Significant Accounting Policies - Additional Information (Details)			12 Months Ended
	Jun. 15, 2021 USD ($) $ / shares shares	Jan. 01, 2020 USD ($)	Dec. 31, 2021 USD ($) segment plan $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Unfunded commitments to fund low-income housing partnerships			$ 43,965,000
Variable interest entity, nonconsolidated, carrying amount, assets			22,784,941,000	$ 20,603,651,000	$ 18,095,496,000
Trading securities			$ 0	0
Number of portfolio segments of loans and leases (commercial and consumer) \| segment			2
Period during which non-accrual loan that has been modified in a troubled debt restructuring remains on non-accrual status (in months)			6 months
Maximum original maturity period of cash and cash equivalents (in days)			90 days
Goodwill impairment			$ 0
Number of company's pension plans \| plan			2
Minimum percentage of net actuarial gain (loss) will be amortized in net periodic benefit cost			10.00%
Minimum percentage of likelihood of tax position being realized upon ultimate settlement according to management's judgment			50.00%
Preferred Stock, par value (in dollars per share) \| $ / shares			$ 0.01
Net proceeds, after underwriting discounts and expenses			$ 175,487,000
Advertising costs			$ 9,600,000	8,300,000	6,100,000
Accounting Standards Update 2016-13
Summary Of Significant Accounting Policies [Line Items]
Total reserve for credit losses					$ 116,849,000
Change in Accounting Principle, Accounting Standards Update, Adoption Date			Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true
Accounting Standards Update 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Summary Of Significant Accounting Policies [Line Items]
Total reserve for credit losses		$ (5,072,000)
Increase to retained earnings		$ 3,632,000
ASU No. 2019-12
Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date			Dec. 15, 2020
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]			true
Depositary Shares
Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold \| shares	7,200,000
Preferred stock, redemption price per share \| $ / shares	$ 25
4.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Percentage of ownership interest in share	0.025%
Series A Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Preferred stock, dividend rate, percentage per annum	4.375%
Preferred Stock, par value (in dollars per share) \| $ / shares	$ 0.01
Preferred stock, liquidation preference per share \| $ / shares	$ 1,000
Net proceeds, after underwriting discounts and expenses	$ 175,500,000
Preferred stock, voting rights	Holders of the Series A Preferred Stock will not have voting rights
Preferred stock, redemption price per share \| $ / shares	$ 1,000
Preferred Stock, redemption date	Aug. 01, 2026
Preferred Stock, Redemption Terms	The Company may redeem the Series A Preferred Stock at its option, (i) in whole or in part, from time to time, on any dividend payment date on or after August 1, 2026 or (ii) in whole but not in part, at any time within 90 days following a regulatory capital treatment event, in either case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share), plus any declared and unpaid dividends.
Maximum \| Building
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives (in years)			30 years
Maximum \| Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives (in years)			10 years
Home Equity
Summary Of Significant Accounting Policies [Line Items]
Minimum maturity period to be considered to place loans and leases on non-accrual status (in days)			120 days
Home Equity \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Combined loan-to-value ratio, considered in determining whether the entire outstanding balance on the loan is to be charged-off or not (as a percent)			60.00%
Commercial
Summary Of Significant Accounting Policies [Line Items]
Minimum maturity period to be considered to place loans and leases on non-accrual status (in days)			90 days
Residential Mortgage and Home Equity Loan
Summary Of Significant Accounting Policies [Line Items]
Minimum maturity period to be considered to place loans and leases on non-accrual status (in days)			120 days
Automobile and Other consumer
Summary Of Significant Accounting Policies [Line Items]
Minimum maturity period to be considered for loans and leases to be charged off (in days)			120 days
Commercial and Industrial
Summary Of Significant Accounting Policies [Line Items]
Minimum maturity period to be considered for loans and leases to be charged off (in days)			120 days
Other Liabilities
Summary Of Significant Accounting Policies [Line Items]
Unfunded commitments to fund low-income housing partnerships			$ 44,000,000.0	53,000,000.0
Low-income Housing Partnerships
Summary Of Significant Accounting Policies [Line Items]
Period over which Federal tax credits or benefits are generally recognized (in years)			10 years
Period over which State tax credits or benefits are generally recognized (in years)			5 years
Solar Energy Partnerships
Summary Of Significant Accounting Policies [Line Items]
Period over which Federal tax credits or benefits are generally recognized (in years)			6 years
Variable Interest Entity Nonconsolidated \| Other Assets
Summary Of Significant Accounting Policies [Line Items]
Variable interest entity, nonconsolidated, carrying amount, assets			$ 136,600,000	$ 143,000,000.0

Summary of Significant Accounting Policies - Schedule of Allowance for Credit Losses Upon Adoption of ASU 2016-13 (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses		$ 157,821	$ 216,252	$ 110,027	$ 106,693
Accounting Standards Update 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses				110,027
Reserve for Unfunded Commitments				6,822
Total Reserve for Credit Losses				116,849
Accounting Standards Update 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	$ (1,737)			(1,737)
Reserve for Unfunded Commitments	(3,335)
Total Reserve for Credit Losses	(5,072)
Retained Earnings
Total Pre-tax Impact	5,072
Tax Effect	(1,440)
Increase to Retained Earnings	3,632
Accounting Standards Update 2016-13 \| January 1, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	108,290			108,290
Reserve for Unfunded Commitments	3,487
Total Reserve for Credit Losses	111,777
Accounting Standards Update 2016-13 \| Commercial Loan
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses				73,801
Accounting Standards Update 2016-13 \| Commercial Loan \| Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	(18,789)
Accounting Standards Update 2016-13 \| Commercial Loan \| January 1, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	55,012
Accounting Standards Update 2016-13 \| Consumer Loan
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses				$ 36,226
Accounting Standards Update 2016-13 \| Consumer Loan \| Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	17,052
Accounting Standards Update 2016-13 \| Consumer Loan \| January 1, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total Allowance for Credit Losses	$ 53,278

Restrictions on Cash and Cash and Cash Equivalents - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Cash And Cash Equivalents [Abstract]
Required Minimum Average Cash Reserve Maintained with Federal Reserve Bank	$ 0	$ 0

Restrictions on Cash and Cash and Cash Equivalents - Schedule of Reconciliation of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Interest-Bearing Deposits in Other Banks	$ 2,571	$ 1,646
Funds Sold	361,536	333,022
Cash and Due From Banks	196,327	279,420
Total Cash and Cash Equivalents	$ 560,434	$ 614,088	$ 558,658	$ 525,969

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Available-for-Sale:
Available-for-Sale: Amortized Cost	$ 4,320,884	$ 3,721,636	$ 2,607,636
Available-for-Sale: Gross Unrealized Gains	21,460	72,428	21,143
Available-for-Sale: Gross Unrealized Losses	(66,288)	(2,375)	(9,776)
Available-for-Sale: Fair Value	4,276,056	3,791,689	2,619,003
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	4,694,780	3,262,727	3,042,294
Held-to-Maturity: Gross Unrealized Gains	28,334	86,494	29,990
Held-to-Maturity: Gross Unrealized Losses	(76,495)	(528)	(9,402)
Held-to-Maturity: Fair Value	4,646,619	3,348,693	3,062,882
Debt Securities Issued by the U.S. Treasury and Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	248,858	174,409	222,365
Available-for-Sale: Gross Unrealized Gains	1,513	427	213
Available-for-Sale: Gross Unrealized Losses	(284)	(591)	(1,447)
Available-for-Sale: Fair Value	250,087	174,245	221,131
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	131,495	7,500	274,375
Held-to-Maturity: Gross Unrealized Gains	287	8	1,319
Held-to-Maturity: Gross Unrealized Losses	(643)	(8)	(31)
Held-to-Maturity: Fair Value	131,139	7,500	275,663
Debt Securities Issued by States and Political Subdivisions
Available-for-Sale:
Available-for-Sale: Amortized Cost	74,743	23,540	54,480
Available-for-Sale: Gross Unrealized Gains	1,080	1,301	631
Available-for-Sale: Gross Unrealized Losses	(5)	(1)	(14)
Available-for-Sale: Fair Value	75,818	24,840	55,097
Held-to-Maturity:
Held-to-Maturity: Amortized Cost		33,763	54,811
Held-to-Maturity: Gross Unrealized Gains		741	1,236
Held-to-Maturity: Fair Value		34,504	56,047
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,758	985	22,128
Available-for-Sale: Gross Unrealized Gains	33	77	19
Available-for-Sale: Gross Unrealized Losses	(11)	0	0
Available-for-Sale: Fair Value	1,780	1,062	22,147
Debt Securities Issued by Corporations
Available-for-Sale:
Available-for-Sale: Amortized Cost	384,590	220,717	335,553
Available-for-Sale: Gross Unrealized Gains	2,339	4,844	1,401
Available-for-Sale: Gross Unrealized Losses	(3,816)	(956)	(633)
Available-for-Sale: Fair Value	383,113	224,605	336,321
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	20,316	12,031	14,975
Held-to-Maturity: Gross Unrealized Gains	76	251
Held-to-Maturity: Gross Unrealized Losses	(249)		(138)
Held-to-Maturity: Fair Value	20,143	12,282	14,837
Residential - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,327,990	1,561,603	1,164,466
Available-for-Sale: Gross Unrealized Gains	9,818	33,657	11,627
Available-for-Sale: Gross Unrealized Losses	(18,766)	(445)	(3,267)
Available-for-Sale: Fair Value	1,319,042	1,594,815	1,172,826
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	1,774,394	917,459	1,067,416
Held-to-Maturity: Gross Unrealized Gains	12,139	30,580	13,247
Held-to-Maturity: Gross Unrealized Losses	(30,621)	(29)	(5,348)
Held-to-Maturity: Fair Value	1,755,912	948,010	1,075,315
Residential - U.S. Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	2,127,781	1,497,353	584,272
Available-for-Sale: Gross Unrealized Gains	4,792	21,254	4,363
Available-for-Sale: Gross Unrealized Losses	(42,247)	(324)	(1,874)
Available-for-Sale: Fair Value	2,090,326	1,518,283	586,761
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	2,286,880	2,099,053	1,546,479
Held-to-Maturity: Gross Unrealized Gains	15,508	51,735	13,871
Held-to-Maturity: Gross Unrealized Losses	(32,627)	(291)	(2,478)
Held-to-Maturity: Fair Value	2,269,761	2,150,497	1,557,872
Commercial - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	155,164	243,029	224,372
Available-for-Sale: Gross Unrealized Gains	1,885	10,868	2,889
Available-for-Sale: Gross Unrealized Losses	(1,159)	(58)	(2,541)
Available-for-Sale: Fair Value	155,890	253,839	224,720
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	481,695	192,921	84,238
Held-to-Maturity: Gross Unrealized Gains	324	3,179	317
Held-to-Maturity: Gross Unrealized Losses	(12,355)	(200)	(1,407)
Held-to-Maturity: Fair Value	469,664	195,900	83,148
Mortgage-Backed Securities
Available-for-Sale:
Available-for-Sale: Amortized Cost	3,610,935	3,301,985	1,973,110
Available-for-Sale: Gross Unrealized Gains	16,495	65,779	18,879
Available-for-Sale: Gross Unrealized Losses	(62,172)	(827)	(7,682)
Available-for-Sale: Fair Value	3,565,258	3,366,937	1,984,307
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	4,542,969	3,209,433	2,698,133
Held-to-Maturity: Gross Unrealized Gains	27,971	85,494	27,435
Held-to-Maturity: Gross Unrealized Losses	(75,603)	(520)	(9,233)
Held-to-Maturity: Fair Value	$ 4,495,337	$ 3,294,407	$ 2,716,335

Investment Securities - Additional Information (Details) $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 29, 2021	Dec. 28, 2021	Jun. 30, 2020 USD ($) shares	Dec. 31, 2021 USD ($) security shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable				$ 45,242	$ 49,303
Carrying Value Of Investment Securities Pledged				$ 2,900,000	3,600,000
Number of available for sale debt securities in unrealized loss positions \| security				231
Gross Gains on Sales of Investment Securities				$ 3,825	14,257	$ 7,810
Visa Class B Restricted Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Conversion ratio	0.016181	0.016228
Gross Gains on Sales of Investment Securities			$ 14,200
Equity securities remaining, shares \| shares			80,214	0
Available-for-sale Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable				$ 8,400	6,600
Held-to-maturity Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable				$ 8,200	$ 6,800

Investment Securities - Analysis of the Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Rolling Maturity[Abstract]
Due in One Year or Less	$ 972
Due After One Year Through Five Years	214,558
Due After Five Years Through Ten Years	347,391
Due After Ten Years	13,130
Amortized Cost, Total	576,051
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-Sale: Amortized Cost	4,320,884	$ 3,721,636	$ 2,607,636
Due in One Year or Less	978
Due After One Year Through Five Years	215,275
Due After Five Years Through Ten Years	345,996
Due After Ten Years	13,305
Fair Value, Total	575,554
Available-for-Sale: Fair Value	4,276,056	3,791,689	2,619,003
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Rolling Maturities (Abstract]
Due After One Year Through Five Years	16,537
Due After Five Years Through Ten Years	123,996
Due After Ten Years	11,278
Amortized Cost, Total	151,811
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Due After One Year Through Five Years	16,391
Due After Five Years Through Ten Years	123,862
Due After Ten Years	11,029
Fair Value, Total	151,282
Held-to-Maturity: Amortized Cost	4,694,780
Held-to-Maturity: Fair Value	4,646,619	3,348,693	3,062,882
Debt Securities Issued by Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	133,898
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	135,244
Residential - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	1,327,990
Available-for-Sale: Amortized Cost	1,327,990	1,561,603	1,164,466
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,319,042
Available-for-Sale: Fair Value	1,319,042	1,594,815	1,172,826
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	1,774,394
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	1,755,912
Held-to-Maturity: Fair Value	1,755,912	948,010	1,075,315
Residential - U.S. Government-Sponsored Enterprises
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	2,127,781
Available-for-Sale: Amortized Cost	2,127,781	1,497,353	584,272
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	2,090,326
Available-for-Sale: Fair Value	2,090,326	1,518,283	586,761
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	2,286,880
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	2,269,761
Held-to-Maturity: Fair Value	2,269,761	2,150,497	1,557,872
Commercial - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	155,164
Available-for-Sale: Amortized Cost	155,164	243,029	224,372
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	155,890
Available-for-Sale: Fair Value	155,890	253,839	224,720
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	481,695
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	469,664
Held-to-Maturity: Fair Value	469,664	195,900	83,148
Mortgage-Backed Securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	3,610,935
Available-for-Sale: Amortized Cost	3,610,935	3,301,985	1,973,110
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	3,565,258
Available-for-Sale: Fair Value	3,565,258	3,366,937	1,984,307
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	4,542,969
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	4,495,337
Held-to-Maturity: Fair Value	$ 4,495,337	$ 3,294,407	$ 2,716,335

Investment Securities - Schedule of Gains and Losses From Sales of Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Gross Gains on Sales of Investment Securities	$ 3,825	$ 14,257	$ 7,810
Gross Losses on Sales of Investment Securities	(5,122)	(4,325)	(11,796)
Net Gains (Losses) on Sales of Investment Securities	$ (1,297)	$ 9,932	$ (3,986)

Investment Securities - Schedule of AFS Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 2,808,862	$ 318,953
Less Than 12 Months, Gross Unrealized Losses	(56,121)	(1,499)
12 Months or Longer, Fair Value	317,559	165,159
12 Months or Longer, Gross Unrealized Losses	(10,167)	(876)
Total Fair Value	3,126,421	484,112
Total Gross Unrealized Losses	(66,288)	(2,375)
Debt Securities Issued by the U.S. Treasury and Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	51,455	21,338
Less Than 12 Months, Gross Unrealized Losses	(195)	(42)
12 Months or Longer, Fair Value	9,995	87,070
12 Months or Longer, Gross Unrealized Losses	(89)	(549)
Total Fair Value	61,450	108,408
Total Gross Unrealized Losses	(284)	(591)
Debt Securities Issued by States and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	643
Less Than 12 Months, Gross Unrealized Losses	(5)
12 Months or Longer, Fair Value		26
12 Months or Longer, Gross Unrealized Losses		(1)
Total Fair Value	643	26
Total Gross Unrealized Losses	(5)	(1)
Debt Securities Issued by Government-Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	814
Less Than 12 Months, Gross Unrealized Losses	(10)
12 Months or Longer, Fair Value	49
12 Months or Longer, Gross Unrealized Losses	(1)
Total Fair Value	863
Total Gross Unrealized Losses	(11)
Debt Securities Issued by Corporations
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	249,629	65,000
Less Than 12 Months, Gross Unrealized Losses	(2,846)	(853)
12 Months or Longer, Fair Value	64,029	50,000
12 Months or Longer, Gross Unrealized Losses	(970)	(103)
Total Fair Value	313,658	115,000
Total Gross Unrealized Losses	(3,816)	(956)
Residential - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	810,157	113,538
Less Than 12 Months, Gross Unrealized Losses	(17,131)	(222)
12 Months or Longer, Fair Value	41,471	28,063
12 Months or Longer, Gross Unrealized Losses	(1,635)	(223)
Total Fair Value	851,628	141,601
Total Gross Unrealized Losses	(18,766)	(445)
Residential - U.S. Government-Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	1,670,500	94,002
Less Than 12 Months, Gross Unrealized Losses	(35,711)	(324)
12 Months or Longer, Fair Value	180,205
12 Months or Longer, Gross Unrealized Losses	(6,536)
Total Fair Value	1,850,705	94,002
Total Gross Unrealized Losses	(42,247)	(324)
Commercial - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	25,664	25,075
Less Than 12 Months, Gross Unrealized Losses	(223)	(58)
12 Months or Longer, Fair Value	21,810
12 Months or Longer, Gross Unrealized Losses	(936)
Total Fair Value	47,474	25,075
Total Gross Unrealized Losses	(1,159)	(58)
Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	2,506,321	232,615
Less Than 12 Months, Gross Unrealized Losses	(53,065)	(604)
12 Months or Longer, Fair Value	243,486	28,063
12 Months or Longer, Gross Unrealized Losses	(9,107)	(223)
Total Fair Value	2,749,807	260,678
Total Gross Unrealized Losses	$ (62,172)	$ (827)

Investment Securities - Schedule of Interest Income From Taxable and Non-Taxable Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Taxable	$ 125,529	$ 125,291	$ 137,204
Non-Taxable	976	2,058	6,586
Total Interest Income from Investment Securities	$ 126,505	$ 127,349	$ 143,790

Investment Securities - Schedule of Carrying Value of Federal Home Loan Bank of Des Moines Stock and Federal Reserve Bank Stock (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Federal Home Loan Bank of Des Moines Stock	$ 10,000	$ 12,000
Federal Reserve Bank Stock	26,624	21,340
Total	$ 36,624	$ 33,340

Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loan and lease portfolio
Loans and Leases	$ 12,259,076	$ 11,940,020
Commercial
Loan and lease portfolio
Loans and Leases	4,966,192	5,100,686
Commercial \| Commercial and Industrial
Loan and lease portfolio
Loans and Leases	1,361,921	1,357,610
Commercial \| PPP
Loan and lease portfolio
Loans and Leases	126,779	517,683
Commercial \| Commercial Mortgage
Loan and lease portfolio
Loans and Leases	3,152,130	2,854,829
Commercial \| Construction
Loan and lease portfolio
Loans and Leases	220,254	259,798
Commercial \| Lease Financing
Loan and lease portfolio
Loans and Leases	105,108	110,766
Consumer
Loan and lease portfolio
Loans and Leases	7,292,884	6,839,334
Consumer \| Other
Loan and lease portfolio
Loans and Leases	410,129	395,483
Consumer \| Residential Mortgage
Loan and lease portfolio
Loans and Leases	4,309,602	4,130,513
Consumer \| Home Equity
Loan and lease portfolio
Loans and Leases	1,836,588	1,604,538
Consumer \| Automobile
Loan and lease portfolio
Loans and Leases	$ 736,565	$ 708,800

Loans and Leases and the Allowance for Credit Losses - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loan and lease portfolio
Net gains related to sales of residential mortgage loans	$ 7,100,000	$ 15,400,000	$ 5,300,000
Accrued interest receivable	45,242,000	49,303,000
Revolving loans, converted to term loan during the period	$ 4,100	2,900
Number of days non-accrual loans are not past due	30 days
Recorded Investment	$ 70,000,000.0	72,500,000
Available commitments to lend additional funds on loans modified as TDR	200,000	500,000
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 1,500,000
Consumer
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 \| Loan	11
Loan and lease modifications, amount - COVID-19	$ 3,100,000
Commercial
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 \| Loan	8
Loan and lease modifications, amount - COVID-19	$ 40,500,000
Classified
Loan and lease portfolio
Number of months up to which residential and home equity loans may be considered classified, even if they are current as to principal and interest	6 months
Classified \| Consumer
Loan and lease portfolio
Number of days past due for loans and leases in classified credit quality indicator	90 days
Pass \| Residential Mortgage
Loan and lease portfolio
Number of days past due for loans and leases in classified credit quality indicator	90 days
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)	60.00%
Pass \| Home Equity
Loan and lease portfolio
Number of days past due for loans and leases in classified credit quality indicator	90 days
Pass \| Home Equity \| First Mortgage
Loan and lease portfolio
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)	60.00%
Pass \| Home Equity \| First Lien
Loan and lease portfolio
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)	60.00%
PPP Loans, Administered by the SBA
Loan and lease portfolio
Loans interest rate	1.00%
Accrued Interest Receivable
Loan and lease portfolio
Accrued interest receivable	$ 28,700,000	$ 35,900,000
Minimum
Loan and lease portfolio
Default period past due following modification of loans in TDR (in days)	60 days
Minimum \| PPP Loans, Administered by the SBA
Loan and lease portfolio
Loans maturity period	2 years
Maximum \| PPP Loans, Administered by the SBA
Loan and lease portfolio
Loans maturity period	5 years

Loans and Leases and the Allowance for Credit Losses - Schedule of Activity in Allowance by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Credit Losses:
Balance at Beginning of Period	$ 216,252	$ 110,027	$ 106,693
Loans and Leases Charged-Off	(17,319)	(21,038)	(23,955)
Recoveries on Loans and Leases Previously Charged-Off	11,354	13,900	11,289
Net Loans and Leases Recovered (Charged-Off)	(5,965)	(7,138)	(12,666)
Provision for Credit Losses	(52,466)	115,100	16,000
Balance at End of Period	157,821	216,252	110,027
Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		110,027
Balance at End of Period			110,027
CECL Adoption Impact \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		(1,737)
Balance at End of Period			(1,737)
January 1, 2020 \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		108,290
Balance at End of Period			108,290
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	84,847	73,801	66,874
Loans and Leases Charged-Off	(1,117)	(1,697)	(2,738)
Recoveries on Loans and Leases Previously Charged-Off	506	2,328	1,513
Net Loans and Leases Recovered (Charged-Off)	(611)	631	(1,225)
Provision for Credit Losses	(19,286)	29,204	8,152
Balance at End of Period	64,950	84,847	73,801
Commercial \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		73,801
Balance at End of Period			73,801
Commercial \| CECL Adoption Impact \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		(18,789)
Balance at End of Period			(18,789)
Commercial \| January 1, 2020 \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		55,012
Balance at End of Period			55,012
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	131,405	36,226	39,819
Loans and Leases Charged-Off	(16,202)	(19,341)	(21,217)
Recoveries on Loans and Leases Previously Charged-Off	10,848	11,572	9,776
Net Loans and Leases Recovered (Charged-Off)	(5,354)	(7,769)	(11,441)
Provision for Credit Losses	(33,180)	85,896	7,848
Balance at End of Period	$ 92,871	131,405	36,226
Consumer \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		36,226
Balance at End of Period			36,226
Consumer \| CECL Adoption Impact \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		17,052
Balance at End of Period			17,052
Consumer \| January 1, 2020 \| Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		$ 53,278
Balance at End of Period			$ 53,278

Loans and Leases and the Allowance for Credit Losses - Schedule of Amortized Cost Basis of Loans and Leases by Credit Quality Indicator, Loan Class, and Year of Origination (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 3,541,779	$ 3,669,902
Fiscal Year Before Latest Fiscal Year	2,603,519	1,701,148
Two Years Before Latest Fiscal Year	1,074,467	1,078,600
Three Years Before Latest Fiscal Year	686,064	879,110
Four Years Before Latest Fiscal Year	516,150	932,627
Prior	1,619,114	1,545,761
Revolving Loans	2,180,226	2,091,726
Revolving Loans Converted to Term Loans	37,757	41,146
Total Loans and Leases	12,259,076	11,940,020
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,675,218	2,078,659
Fiscal Year Before Latest Fiscal Year	1,270,223	764,275
Two Years Before Latest Fiscal Year	474,461	531,323
Three Years Before Latest Fiscal Year	372,765	315,087
Four Years Before Latest Fiscal Year	208,787	343,502
Prior	607,387	568,609
Revolving Loans	356,826	498,207
Revolving Loans Converted to Term Loans	525	1,024
Total Loans and Leases	4,966,192	5,100,686
Commercial \| Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	468,801	470,690
Fiscal Year Before Latest Fiscal Year	336,232	150,800
Two Years Before Latest Fiscal Year	79,913	151,734
Three Years Before Latest Fiscal Year	70,016	50,162
Four Years Before Latest Fiscal Year	27,751	52,483
Prior	92,903	87,530
Revolving Loans	285,780	393,187
Revolving Loans Converted to Term Loans	525	1,024
Total Loans and Leases	1,361,921	1,357,610
Commercial \| Commercial and Industrial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	455,984	426,780
Fiscal Year Before Latest Fiscal Year	301,646	149,024
Two Years Before Latest Fiscal Year	79,826	149,468
Three Years Before Latest Fiscal Year	68,026	49,385
Four Years Before Latest Fiscal Year	27,246	52,354
Prior	75,321	68,269
Revolving Loans	256,240	342,339
Revolving Loans Converted to Term Loans	471	847
Total Loans and Leases	1,264,760	1,238,466
Commercial \| Commercial and Industrial \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,966	11,702
Fiscal Year Before Latest Fiscal Year	32,667	42
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	110
Prior	101	95
Revolving Loans	27,031	32,319
Revolving Loans Converted to Term Loans	0	52
Total Loans and Leases	61,765	44,320
Commercial \| Commercial and Industrial \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	10,851	32,208
Fiscal Year Before Latest Fiscal Year	1,919	1,734
Two Years Before Latest Fiscal Year	87	2,266
Three Years Before Latest Fiscal Year	1,990	777
Four Years Before Latest Fiscal Year	505	19
Prior	17,481	19,166
Revolving Loans	2,509	18,529
Revolving Loans Converted to Term Loans	54	125
Total Loans and Leases	35,396	74,824
Commercial \| PPP
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	86,484	517,683
Fiscal Year Before Latest Fiscal Year	40,295	0
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	126,779	517,683
Commercial \| PPP \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	86,484	517,683
Fiscal Year Before Latest Fiscal Year	40,295	0
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	126,779	517,683
Commercial \| Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,031,227	963,839
Fiscal Year Before Latest Fiscal Year	783,743	487,545
Two Years Before Latest Fiscal Year	338,800	353,437
Three Years Before Latest Fiscal Year	291,991	252,548
Four Years Before Latest Fiscal Year	178,436	281,267
Prior	474,547	439,324
Revolving Loans	53,386	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	3,152,130	2,854,829
Commercial \| Commercial Mortgage \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	958,719	847,676
Fiscal Year Before Latest Fiscal Year	736,155	458,472
Two Years Before Latest Fiscal Year	338,160	350,363
Three Years Before Latest Fiscal Year	261,991	245,157
Four Years Before Latest Fiscal Year	178,436	267,860
Prior	459,337	425,157
Revolving Loans	53,386	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,986,184	2,671,554
Commercial \| Commercial Mortgage \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	68,768	66,523
Fiscal Year Before Latest Fiscal Year	39,773	28,418
Two Years Before Latest Fiscal Year	0	291
Three Years Before Latest Fiscal Year	30,000	7,117
Four Years Before Latest Fiscal Year	0	8,665
Prior	6,069	5,035
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	144,610	116,049
Commercial \| Commercial Mortgage \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	3,740	49,640
Fiscal Year Before Latest Fiscal Year	7,815	655
Two Years Before Latest Fiscal Year	640	2,783
Three Years Before Latest Fiscal Year	0	274
Four Years Before Latest Fiscal Year	0	4,742
Prior	9,141	9,132
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	21,336	67,226
Commercial \| Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	67,069	106,508
Fiscal Year Before Latest Fiscal Year	94,878	105,731
Two Years Before Latest Fiscal Year	40,051	11,275
Three Years Before Latest Fiscal Year	0	8,133
Four Years Before Latest Fiscal Year	596	0
Prior	0	0
Revolving Loans	17,660	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	220,254	259,798
Commercial \| Construction \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	67,069	106,508
Fiscal Year Before Latest Fiscal Year	94,878	105,731
Two Years Before Latest Fiscal Year	40,051	11,275
Three Years Before Latest Fiscal Year	0	8,133
Four Years Before Latest Fiscal Year	596	0
Prior	0	0
Revolving Loans	17,660	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	220,254	259,798
Commercial \| Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	21,637	19,939
Fiscal Year Before Latest Fiscal Year	15,075	20,199
Two Years Before Latest Fiscal Year	15,697	14,877
Three Years Before Latest Fiscal Year	10,758	4,244
Four Years Before Latest Fiscal Year	2,004	9,752
Prior	39,937	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	105,108	110,766
Commercial \| Lease Financing \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	21,637	19,906
Fiscal Year Before Latest Fiscal Year	15,075	20,132
Two Years Before Latest Fiscal Year	15,697	13,785
Three Years Before Latest Fiscal Year	9,902	4,202
Four Years Before Latest Fiscal Year	2,004	9,657
Prior	39,937	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	104,252	109,437
Commercial \| Lease Financing \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	0	33
Fiscal Year Before Latest Fiscal Year	0	67
Two Years Before Latest Fiscal Year	0	1,092
Three Years Before Latest Fiscal Year	856	42
Four Years Before Latest Fiscal Year	0	95
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	856	1,329
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,866,561	1,591,243
Fiscal Year Before Latest Fiscal Year	1,333,296	936,873
Two Years Before Latest Fiscal Year	600,006	547,277
Three Years Before Latest Fiscal Year	313,299	564,023
Four Years Before Latest Fiscal Year	307,363	589,125
Prior	1,011,727	977,152
Revolving Loans	1,823,400	1,593,519
Revolving Loans Converted to Term Loans	37,232	40,122
Total Loans and Leases	7,292,884	6,839,334
Consumer \| Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,392,337	1,300,831
Fiscal Year Before Latest Fiscal Year	1,131,330	576,746
Two Years Before Latest Fiscal Year	367,819	295,522
Three Years Before Latest Fiscal Year	177,215	455,197
Four Years Before Latest Fiscal Year	257,730	545,798
Prior	983,171	956,419
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,309,602	4,130,513
Consumer \| Residential Mortgage \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	1,392,337	1,300,831
Fiscal Year Before Latest Fiscal Year	1,131,330	576,452
Two Years Before Latest Fiscal Year	367,525	295,522
Three Years Before Latest Fiscal Year	177,215	454,165
Four Years Before Latest Fiscal Year	255,451	545,798
Prior	982,306	954,120
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,306,164	4,126,888
Consumer \| Residential Mortgage \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year Before Latest Fiscal Year	0	294
Two Years Before Latest Fiscal Year	294	0
Three Years Before Latest Fiscal Year	0	1,032
Four Years Before Latest Fiscal Year	2,279	0
Prior	865	2,299
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	3,438	3,625
Consumer \| Home Equity Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year Before Latest Fiscal Year	0	0
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	0
Prior	3,044	4,537
Revolving Loans	1,797,756	1,561,364
Revolving Loans Converted to Term Loans	35,788	38,637
Total Loans and Leases	1,836,588	1,604,538
Consumer \| Home Equity Loan \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year Before Latest Fiscal Year	0	0
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	0
Prior	2,934	4,449
Revolving Loans	1,793,142	1,556,671
Revolving Loans Converted to Term Loans	35,141	37,559
Total Loans and Leases	1,831,217	1,598,679
Consumer \| Home Equity Loan \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	0	0
Fiscal Year Before Latest Fiscal Year	0	0
Two Years Before Latest Fiscal Year	0	0
Three Years Before Latest Fiscal Year	0	0
Four Years Before Latest Fiscal Year	0	0
Prior	110	88
Revolving Loans	4,614	4,693
Revolving Loans Converted to Term Loans	647	1,078
Total Loans and Leases	5,371	5,859
Consumer \| Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	301,450	219,319
Fiscal Year Before Latest Fiscal Year	152,107	214,159
Two Years Before Latest Fiscal Year	139,021	158,387
Three Years Before Latest Fiscal Year	91,548	68,889
Four Years Before Latest Fiscal Year	33,388	34,060
Prior	19,051	13,986
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	736,565	708,800
Consumer \| Automobile \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	301,285	219,218
Fiscal Year Before Latest Fiscal Year	152,022	213,914
Two Years Before Latest Fiscal Year	138,887	158,216
Three Years Before Latest Fiscal Year	91,411	68,776
Four Years Before Latest Fiscal Year	33,268	33,899
Prior	18,963	13,850
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	735,836	707,873
Consumer \| Automobile \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	165	101
Fiscal Year Before Latest Fiscal Year	85	245
Two Years Before Latest Fiscal Year	134	171
Three Years Before Latest Fiscal Year	137	113
Four Years Before Latest Fiscal Year	120	161
Prior	88	136
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	729	927
Consumer \| Other Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	172,774	71,093
Fiscal Year Before Latest Fiscal Year	49,859	145,968
Two Years Before Latest Fiscal Year	93,166	93,368
Three Years Before Latest Fiscal Year	44,536	39,937
Four Years Before Latest Fiscal Year	16,245	9,267
Prior	6,461	2,210
Revolving Loans	25,644	32,155
Revolving Loans Converted to Term Loans	1,444	1,485
Total Loans and Leases	410,129	395,483
Consumer \| Other Loans \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	172,735	71,042
Fiscal Year Before Latest Fiscal Year	49,769	145,549
Two Years Before Latest Fiscal Year	92,983	92,993
Three Years Before Latest Fiscal Year	44,489	39,770
Four Years Before Latest Fiscal Year	16,218	9,225
Prior	6,444	2,189
Revolving Loans	25,622	32,070
Revolving Loans Converted to Term Loans	1,444	1,485
Total Loans and Leases	409,704	394,323
Consumer \| Other Loans \| Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Current Fiscal Year	39	51
Fiscal Year Before Latest Fiscal Year	90	419
Two Years Before Latest Fiscal Year	183	375
Three Years Before Latest Fiscal Year	47	167
Four Years Before Latest Fiscal Year	27	42
Prior	17	21
Revolving Loans	22	85
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	$ 425	$ 1,160

Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 12,259,076	$ 11,940,020
Non- Accrual	16,634	16,149
Total Past Due and Non- Accrual	45,161	52,619
Total Loans and Leases	12,259,076	11,940,020
Non- Accrual Loans and Leases that are Current	9,900	8,355
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,966,192	5,100,686
Non- Accrual	8,448	8,968
Total Past Due and Non- Accrual	10,468	9,218
Total Loans and Leases	4,966,192	5,100,686
Non- Accrual Loans and Leases that are Current	8,356	5,268
Commercial \| Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,361,921	1,357,610
Non- Accrual	243	441
Total Past Due and Non- Accrual	2,263	691
Total Loans and Leases	1,361,921	1,357,610
Non- Accrual Loans and Leases that are Current	151	285
Commercial \| PPP
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	126,779	517,683
Non- Accrual	0	0
Total Past Due and Non- Accrual	0	0
Total Loans and Leases	126,779	517,683
Non- Accrual Loans and Leases that are Current	0	0
Commercial \| Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,152,130	2,854,829
Non- Accrual	8,205	8,527
Total Past Due and Non- Accrual	8,205	8,527
Total Loans and Leases	3,152,130	2,854,829
Non- Accrual Loans and Leases that are Current	8,205	4,983
Commercial \| Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	220,254	259,798
Non- Accrual	0	0
Total Past Due and Non- Accrual	0	0
Total Loans and Leases	220,254	259,798
Non- Accrual Loans and Leases that are Current	0	0
Commercial \| Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	105,108	110,766
Non- Accrual	0	0
Total Past Due and Non- Accrual	0	0
Total Loans and Leases	105,108	110,766
Non- Accrual Loans and Leases that are Current	0	0
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,292,884	6,839,334
Non- Accrual	8,186	7,181
Total Past Due and Non- Accrual	34,693	43,401
Total Loans and Leases	7,292,884	6,839,334
Non- Accrual Loans and Leases that are Current	1,544	3,087
Consumer \| Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non- Accrual	0	0
Total Past Due and Non- Accrual	4,016	5,328
Total Loans and Leases	410,129	395,483
Non- Accrual Loans and Leases that are Current	0	0
Consumer \| Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,309,602	4,130,513
Non- Accrual	3,305	3,223
Total Past Due and Non- Accrual	9,773	14,629
Total Loans and Leases	4,309,602	4,130,513
Non- Accrual Loans and Leases that are Current	0	2,100
Consumer \| Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non- Accrual	4,881	3,958
Total Past Due and Non- Accrual	10,876	13,946
Total Loans and Leases	1,836,588	1,604,538
Non- Accrual Loans and Leases that are Current	1,544	987
Consumer \| Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	736,565	708,800
Non- Accrual	0	0
Total Past Due and Non- Accrual	10,028	9,498
Total Loans and Leases	736,565	708,800
Non- Accrual Loans and Leases that are Current	0	0
30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	16,333	16,577
30 - 59 Days Past Due \| Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,006	191
30 - 59 Days Past Due \| Commercial \| Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,006	191
30 - 59 Days Past Due \| Commercial \| PPP
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due \| Commercial \| Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due \| Commercial \| Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due \| Commercial \| Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	14,327	16,386
30 - 59 Days Past Due \| Consumer \| Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,686	2,556
30 - 59 Days Past Due \| Consumer \| Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,046	4,049
30 - 59 Days Past Due \| Consumer \| Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,791	3,423
30 - 59 Days Past Due \| Consumer \| Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,804	6,358
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,424	9,347
60 - 89 Days Past Due \| Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	14	59
60 - 89 Days Past Due \| Commercial \| Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	14	59
60 - 89 Days Past Due \| Commercial \| PPP
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due \| Commercial \| Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due \| Commercial \| Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due \| Commercial \| Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,410	9,288
60 - 89 Days Past Due \| Consumer \| Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	904	1,612
60 - 89 Days Past Due \| Consumer \| Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,263	2,083
60 - 89 Days Past Due \| Consumer \| Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	748	3,378
60 - 89 Days Past Due \| Consumer \| Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,495	2,215
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,770	10,546
Past Due 90 Days or More \| Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Commercial \| Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Commercial \| PPP
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Commercial \| Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Commercial \| Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Commercial \| Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,770	10,546
Past Due 90 Days or More \| Consumer \| Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	426	1,160
Past Due 90 Days or More \| Consumer \| Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,159	5,274
Past Due 90 Days or More \| Consumer \| Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,456	3,187
Past Due 90 Days or More \| Consumer \| Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	729	925
Current
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	12,213,915	11,887,401
Current \| Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,955,724	5,091,468
Current \| Commercial \| Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,359,658	1,356,919
Current \| Commercial \| PPP
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	126,779	517,683
Current \| Commercial \| Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,143,925	2,846,302
Current \| Commercial \| Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	220,254	259,798
Current \| Commercial \| Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	105,108	110,766
Current \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,258,191	6,795,933
Current \| Consumer \| Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	406,113	390,155
Current \| Consumer \| Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,299,829	4,115,884
Current \| Consumer \| Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,825,712	1,590,592
Current \| Consumer \| Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 726,537	$ 699,302

Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2021
Loans And Leases And Allowance For Loan And Lease Losses [Abstract]
Number of days non-accrual loans and leases are not past due	30 days

Loans and Leases and the Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	$ 12,744
Non-accrual loans without a specific ACL	3,890
Total Non-accrual loans	16,634	$ 16,149
Commercial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	4,904
Non-accrual loans without a specific ACL	3,544
Total Non-accrual loans	8,448	8,968
Commercial \| Commercial and Industrial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	243
Non-accrual loans without a specific ACL	0
Total Non-accrual loans	243	441
Commercial \| Commercial Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	4,661
Non-accrual loans without a specific ACL	3,544
Total Non-accrual loans	8,205	8,527
Consumer
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	7,840
Non-accrual loans without a specific ACL	346
Total Non-accrual loans	8,186	7,181
Consumer \| Residential Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	2,959
Non-accrual loans without a specific ACL	346
Total Non-accrual loans	3,305	3,223
Consumer \| Home Equity
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a specific ACL	4,881
Non-accrual loans without a specific ACL	0
Total Non-accrual loans	$ 4,881	$ 3,958

Loans and Leases and the Allowance for Credit Losses - Schedule of Loans Modified in TDR (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) contract	Dec. 31, 2020 USD ($) contract
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	506	548
Recorded Investment (as of period end)	$ 16,223	$ 11,886
Increase in Allowance (as of period end)	$ 838	$ 262
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	7	6
Recorded Investment (as of period end)	$ 251	$ 1,249
Increase in Allowance (as of period end)	$ 4	$ 65
Commercial \| Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	7	5
Recorded Investment (as of period end)	$ 251	$ 203
Increase in Allowance (as of period end)	$ 4	$ 5
Commercial \| Commercial Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract		1
Recorded Investment (as of period end)		$ 1,046
Increase in Allowance (as of period end)		$ 60
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	499	542
Recorded Investment (as of period end)	$ 15,972	$ 10,637
Increase in Allowance (as of period end)	$ 834	$ 197
Consumer \| Other
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	132	180
Recorded Investment (as of period end)	$ 1,160	$ 1,850
Increase in Allowance (as of period end)	$ 42	$ 77
Consumer \| Residential Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	15
Recorded Investment (as of period end)	$ 5,889
Increase in Allowance (as of period end)	$ 612
Consumer \| Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	11	10
Recorded Investment (as of period end)	$ 1,793	$ 1,246
Increase in Allowance (as of period end)	$ 85	$ 8
Consumer \| Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts \| contract	341	352
Recorded Investment (as of period end)	$ 7,130	$ 7,541
Increase in Allowance (as of period end)	$ 95	$ 112

Loans and Leases and the Allowance for Credit Losses - Schedule of TDRs that Defaulted during Period, within Twelve Months of Modification Date (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) contract	Dec. 31, 2020 USD ($) contract
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	72	54
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 1,761	$ 831
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract		1
Recorded Investment (as of period ended), TDRs that Defaulted \| $		$ 27
Commercial \| Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract		1
Recorded Investment (as of period ended), TDRs that Defaulted \| $		$ 27
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	72	53
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 1,761	$ 804
Consumer \| Other
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	29	10
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 189	$ 81
Consumer \| Residential Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	1
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 521
Consumer \| Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	4
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 407
Consumer \| Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted \| contract	38	43
Recorded Investment (as of period ended), TDRs that Defaulted \| $	$ 644	$ 723

Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Transfers And Servicing Of Financial Assets [Abstract]
Residential mortgage loans serviced for third parties	$ 2,700.0	$ 2,800.0
Servicing income, including late and ancillary fees	$ 6.4	$ 7.2	$ 7.3

Mortgage Servicing Rights - Summary of Carrying Value Under the Fair Value Measurement Method (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Assets At Fair Value [Line Items]
Balance at Beginning of Year	$ 958	$ 1,126	$ 1,290
Changes in Fair Value Due to Payoffs	(158)	(168)	(164)
Balance at End of Year	$ 800	$ 958	$ 1,126

Mortgage Servicing Rights - Summary of Carrying Value Under the Amortization Method (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Mortgage Servicing Rights Accounted for Under the Amortization Method (Rollforward)
Balance at Beginning of Year	$ 18,694	$ 23,896	$ 23,020
Servicing Rights that Resulted From Asset Transfers	4,921	3,592	4,485
Amortization	(4,227)	(4,902)	(3,609)
Valuation Allowance Recovery (Provision)	2,063	(3,892)
Balance at End of Year	21,451	18,694	23,896
Valuation Allowance:
Balance at Beginning of Year	(3,892)
Valuation Allowance Recovery (Provision)	2,063	(3,892)
Balance at End of Year	(1,829)	(3,892)
Fair Value:
Balance	$ 21,451	$ 18,694	$ 25,714	$ 29,218

Mortgage Servicing Rights - Schedule of Key Data and Assumptions Used in Estimating the Fair Value (Details) - Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Assumption For Fair Value As Of Balance Sheet Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Weighted-Average Constant Prepayment Rate (as a percent)	10.70%	14.42%
Weighted-Average Life (in years)	6 years 2 months 4 days	4 years 11 months 26 days
Weighted-Average Note Rate (as a percent)	3.62%	3.87%
Weighted-Average Discount Rate (as a percent)	7.04%	5.81%

Mortgage Servicing Rights - Schedule of Sensitivity Analysis of the Fair Value (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$ (252)	$ (203)
Decrease in fair value from 50 bps adverse change	(498)	(401)
Discount Rate
Decrease in fair value from 25 bps adverse change	(223)	(184)
Decrease in fair value from 50 bps adverse change	$ (441)	$ (365)

Premises and Equipment - Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Cost	$ 517,918	$ 520,825
Accumulated Depreciation and Amortization	(318,525)	(321,130)
Net Book Value	199,393	199,695
Premises
Property Plant And Equipment [Line Items]
Cost	366,205	370,268
Accumulated Depreciation and Amortization	(226,515)	(237,024)
Net Book Value	139,690	133,244
Equipment
Property Plant And Equipment [Line Items]
Cost	145,120	143,964
Accumulated Depreciation and Amortization	(87,649)	(79,817)
Net Book Value	57,471	64,147
Finance leases
Property Plant And Equipment [Line Items]
Cost	6,593	6,593
Accumulated Depreciation and Amortization	(4,361)	(4,289)
Net Book Value	$ 2,232	$ 2,304

Premises and Equipment - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) branch	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property Plant And Equipment [Line Items]
Depreciation and amortization (including capital lease amortization) included in noninterest expense	$ 21,100,000	$ 20,200,000	$ 17,300,000
Number of branches closed \| branch	12
Premises
Property Plant And Equipment [Line Items]
Impairment charge	$ 0	1,600,000	0
Equipment
Property Plant And Equipment [Line Items]
Impairment charge	$ 0	$ 1,600,000	$ 0

Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Federal Home Loan Bank of Des Moines and Federal Reserve Bank Stock	$ 36,624	$ 33,340
Derivative Financial Instruments	42,011	96,167
Low-Income Housing and Other Equity Investments	136,647	142,961
Deferred Compensation Plan Assets	56,411	53,410
Prepaid Expenses	17,670	14,517
Accounts Receivable	13,323	12,380
Deferred Tax Assets	42,277	16,724
Other	39,764	65,794
Total Other Assets	$ 384,727	$ 435,293

Deposits - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Total time deposits	$ 1,000,089	$ 1,662,063
Government entity deposits	1,200,000	1,500,000
Total time deposits100,000 or more	$ 757,964	$ 1,400,000

Deposits - Schedule of Time Deposits with Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Time deposits classified according to the contractual maturities
2022	$ 796,092
2023	126,884
2024	29,347
2025	7,228
2026	32,235
Thereafter	8,303
Total	1,000,089	$ 1,662,063
Time deposits with balances of $100,000 or more, classified according to the contractual maturities
Three Months or Less	290,440
Over Three Months through Six Months	142,166
Over Six Months through Twelve Months	208,867
Over Twelve Months	116,491
Total	$ 757,964	$ 1,400,000

Borrowings - Schedule of Details of Short-term Borrowings (Details) - Securities Sold Under Agreements to Repurchase $ in Thousands	Dec. 31, 2020 USD ($)
Short Term Debt [Line Items]
Amounts Outstanding	$ 100
Weighted-Average Interest Rate	1.20%

Borrowings - Schedule of Details of Short-term Borrowings (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Short Term Debt [Line Items]
Securities Sold Under Agreements to Repurchase	$ 450,490	$ 600,590
Long-term Repurchase Agreements with Government Entities
Short Term Debt [Line Items]
Securities Sold Under Agreements to Repurchase	500	500
Long-term Repurchase Agreements with Private Institutions
Short Term Debt [Line Items]
Securities Sold Under Agreements to Repurchase	$ 450,000	$ 600,000

Borrowings - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold Under Agreements to Repurchase	$ 450,490	$ 600,590
Long-term Repurchase Agreements with Government Entities
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold Under Agreements to Repurchase	$ 500	500
Repurchase agreements, Weighted average interest rate (as a percent)	1.55%
Repurchase agreement counterparty, weighted average maturity of agreements	2 years 10 months 24 days
Long-term Repurchase Agreements with Private Institutions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold Under Agreements to Repurchase	$ 450,000	$ 600,000
Repurchase agreements, Weighted average interest rate (as a percent)	2.46%
Repurchase agreement counterparty, weighted average maturity of agreements	3 years
Long-term Repurchase Agreements with Private Institutions \| Minimum [Member]
Assets Sold Under Agreements To Repurchase [Line Items]
Repurchase agreement remaining weighted average term range	2024
Long-term Repurchase Agreements with Private Institutions \| Maximum
Assets Sold Under Agreements To Repurchase [Line Items]
Repurchase agreement remaining weighted average term range	2026

Other Debt - Schedule of Other Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Finance Lease Obligations	$ 10,391	$ 10,481
Total	$ 10,391	60,481
Federal Home Loan Bank Advance
Debt Instrument [Line Items]
Federal Home Loan Bank of Des Moines Advances		$ 50,000

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

Other Debt - Additional Information (Details)	12 Months Ended
Other Debt - Additional Information (Details)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Maximum percentage of the total assets that can be borrowed from the FHLB by the entity	45.00%
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Undrawn line of credit with the FHLB or FRB	$ 385,900,000
Federal Home Loan Bank Advance
Debt Instrument [Line Items]
Undrawn line of credit with the FHLB or FRB	$ 3,000,000,000.0
Finance Lease Obligations
Debt Instrument [Line Items]
Lease term (in years)	60 years
Fixed lease payments through December 2022	$ 800,000

Shareholders' Equity - Schedule of Minimum Required Capital Amounts and Ratios for Well Capitalized Institutions and The Actual Capital Amounts and Ratios for The Company and The Bank (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,611,611	$ 1,374,507	$ 1,286,832	$ 1,268,200
Well Capitalized Minimum Common Equity Tier One Ratio (as a percent)	6.50%	6.50%
Well Capitalized Minimum Tier 1 Capital Ratio (as a percent)	8.0	8.0
Well Capitalized Minimum Total Capital Ratio (as a percent)	10.0	10.0
Well Capitalized Minimum Tier 1 Leverage Ratio (as a percent)	5.0	5.0
Parent [Member]
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,436,124	$ 1,374,507
Common Equity Tier One Capital	1,483,455	1,361,915
Tier 1 Capital	1,658,942	1,361,915
Total Capital	$ 1,811,943	$ 1,503,784
Common Equity Tier One Capital Ratio	12.12%	12.06%
Tier 1 Capital Ratio (as a percent)	13.56	12.06
Total Capital Ratio (as a percent)	14.81	13.31
Tier 1 Leverage Ratio (as a percent)	7.32	6.71
Subsidiaries [Member]
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,586,473	$ 1,290,455
Common Equity Tier One Capital	1,645,405	1,289,435
Tier 1 Capital	1,645,405	1,289,435
Total Capital	$ 1,798,190	$ 1,431,106
Common Equity Tier One Capital Ratio	13.47%	11.43%
Tier 1 Capital Ratio (as a percent)	13.47	11.43
Total Capital Ratio (as a percent)	14.72	12.69
Tier 1 Leverage Ratio (as a percent)	7.26	6.35

Shareholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands		12 Months Ended			246 Months Ended
	Jun. 15, 2021 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) yr $ / shares shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares
Dividends
Number of prior calendar years considered for payment of dividends in excess of the sum of net income \| yr		2
Common Stock Repurchase Program
Number of shares of common stock repurchased \| shares		328,832			57,400,000
Amount returned to shareholders on stock repurchase \| $		$ 31,258	$ 18,006	$ 137,649	$ 2,300,000
Average cost of shares repurchased (in dollars per share)		$ 83.14			$ 40.76
Treasury Stock Value Acquired Cost Method Share Repurchase Program \| $		$ 27,300
Preferred Stock, par value (in dollars per share)		$ 0.01			$ 0.01
Net proceeds, after underwriting discounts and expenses \| $		$ 175,487
Depositary Shares
Common Stock Repurchase Program
Shares issued and sold \| shares	7,200,000
Preferred stock, redemption price per share	$ 25
4.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock
Common Stock Repurchase Program
Percentage of ownership interest in share	0.025%
Series A Preferred Stock
Common Stock Repurchase Program
Preferred stock, dividend rate, percentage per annum	4.375%
Preferred Stock, par value (in dollars per share)	$ 0.01
Preferred stock, liquidation preference per share	$ 1,000
Net proceeds, after underwriting discounts and expenses \| $	$ 175,500
Preferred stock, voting rights	Holders of the Series A Preferred Stock will not have voting rights
Preferred stock, redemption price per share	$ 1,000
Preferred Stock, redemption date	Aug. 01, 2026
Preferred Stock, Redemption Terms	The Company may redeem the Series A Preferred Stock at its option, (i) in whole or in part, from time to time, on any dividend payment date on or after August 1, 2026 or (ii) in whole but not in part, at any time within 90 days following a regulatory capital treatment event, in either case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share), plus any declared and unpaid dividends.
Accounting Standards Update 2016-13
Class Of Stock [Line Items]
Percentage of allowance for credit losses after-tax		25.00%
Regulatory capital commencing period		Jan. 01, 2022
Percentage of allowance for credit losses pre-tax		25.00%
Percentage of cumulative adjustment to allowance for credit losses		25.00%
Minimum
Class Of Stock [Line Items]
Additional Tier 1 capital ratio		2.5			2.5

Shareholders' Equity - AOCI Components Pre Post & Tax Effect (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive Income (Loss), Before Tax:
Net Unrealized Gains (Losses) Arising During the Period	$ (111,084)	$ 58,763	$ 30,169
(Gain) Loss on Sale	(3,798)	(77)	(152)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	648	397	833
Net Unrealized Gains (Losses) on Investment Securities	(114,234)	59,083	30,850
Net Actuarial Gains (Losses) Arising During the Period	10,842	(8,187)	(5,046)
Amortization of Net Actuarial Losses (Gains)	2,676	2,318	1,598
Amortization of Prior Service Credit	(246)	(246)	(288)
Defined Benefit Plans, Net	13,272	(6,115)	(3,736)
Other Comprehensive Income (Loss)	(100,962)	52,968	27,114
Other Comprehensive Income (Loss), Tax Effect:
Net Unrealized Gains (Losses) Arising During the Period	(29,440)	15,600	8,001
(Gain) Loss on Sale	(1,007)	(50)	(49)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	171	105	221
Net Unrealized Gains (Losses) on Investment Securities	(30,276)	15,655	8,173
Net Actuarial Gains (Losses) Arising During the Period	2,874	(2,170)	(1,337)
Amortization of Net Actuarial Losses (Gains)	709	614	423
Amortization of Prior Service Credit	(65)	(65)	(76)
Defined Benefit Plans, Net	3,518	(1,621)	(990)
Other Comprehensive Income (Loss)	(26,758)	14,034	7,183
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) Arising During the Period	(81,644)	43,163	22,168
(Gain) Loss on Sale	(2,791)	(27)	(103)
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	477	292	612
Net Unrealized Gains (Losses) on Investment Securities	(83,958)	43,428	22,677
Net Actuarial Gains (Losses) Arising During the Period	7,968	(6,017)	(3,709)
Amortization of Net Actuarial Losses (Gains)	1,967	1,704	1,175
Amortization of Prior Service Credit	(181)	(181)	(212)
Defined Benefit Plans, Net	9,754	(4,494)	(2,746)
Other Comprehensive Income (Loss)	$ (74,204)	$ 38,934	$ 19,931

Shareholders' Equity - Change in AOCI Components Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	$ 1,374,507	$ 1,286,832	$ 1,268,200
Other Comprehensive Income (Loss)	(74,204)	38,934	19,931
Balance at End of Period	1,611,611	$ 1,374,507	1,286,832
Accounting Standards Update Extensible List		Accounting Standards Update 2016-13
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period		$ 3,632
Balance at End of Period			3,632
Unrealized Gains and Losses on Net Investment Securities \| Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	51,495	8,359	(10,447)
Other Comprehensive Income (Loss) Before Reclassifications	(81,644)	43,163	22,168
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(2,791)	(27)	(103)
Other Comprehensive Income (Loss)	(84,435)	43,136	18,806
Balance at End of Period	(32,940)	51,495	$ 8,359
Accounting Standards Update Extensible List			us-gaap:AccountingStandardsUpdate201904Member
Unrealized Gains and Losses on Net Investment Securities \| Available-for-sale Securities \| Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period			$ (3,259)
Unrealized Gains and Losses on Net Investment Securities \| Held-to-maturity Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(423)	(715)	(4,586)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	477	292	612
Other Comprehensive Income (Loss)	477	292	3,871
Balance at End of Period	54	(423)	$ (715)
Accounting Standards Update Extensible List			us-gaap:AccountingStandardsUpdate201904Member
Unrealized Gains and Losses on Net Investment Securities \| Held-to-maturity Securities \| Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period			$ 3,259
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(43,250)	(38,756)	(36,010)
Other Comprehensive Income (Loss) Before Reclassifications	7,968	(6,017)	(3,709)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	1,786	1,523	963
Other Comprehensive Income (Loss)	9,754	(4,494)	(2,746)
Balance at End of Period	(33,496)	(43,250)	(38,756)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	7,822	(31,112)	(51,043)
Other Comprehensive Income (Loss) Before Reclassifications	(73,676)	37,146	18,459
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(528)	1,788	1,472
Other Comprehensive Income (Loss)	(74,204)	38,934	19,931
Balance at End of Period	$ (66,382)	$ 7,822	$ (31,112)

Shareholders' Equity - AOCI Reclass to IS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	$ (72,182)	$ (35,320)	$ (59,913)
Net Income	253,372	153,804	225,913
Salaries and Benefits	(228,293)	(207,329)	(216,106)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income	528	(1,788)	(1,472)
Reclassification out of Accumulated Other Comprehensive Income \| Amortization of Unrealized Gains(Losses) of Investment Securities Transferred from AFS to HTM
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Interest Income	(648)	(397)	(833)
Provision for Income Tax	171	105	221
Net Income	(477)	(292)	(612)
Reclassification out of Accumulated Other Comprehensive Income \| Sales of Investment Securities Available-for-Sale
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	(1,007)	(50)	(49)
Net Income	2,791	27	103
Sales of Investment Securities Available-for-Sale	3,798	77	152
Reclassification out of Accumulated Other Comprehensive Income \| Prior Service Credit
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	246	246	288
Reclassification out of Accumulated Other Comprehensive Income \| Net Actuarial Losses
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	(2,676)	(2,318)	(1,598)
Reclassification out of Accumulated Other Comprehensive Income \| Amortization of Defined Benefit Plans Items
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	644	549	347
Net Income	(1,786)	(1,523)	(963)
Salaries and Benefits	$ (2,430)	$ (2,072)	$ (1,310)

Earnings Per Common Share - Schedule of Reconciliation of Weighted Average Number of Common Shares Used in the Calculation of Basic and Diluted Earnings Per Common Share and Antidilutive Stock Options and Restricted Stock Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net Income Available to Common Shareholders	$ 250,397	$ 153,804	$ 225,913
Denominator:
Weighted Average Common Shares Outstanding - Basic	39,837,798	39,726,210	40,384,328
Dilutive Effect of Equity Based Awards (in shares)	215,866	165,897	265,242
Weighted Average Common Shares Outstanding - Diluted	40,053,664	39,892,107	40,649,570
Earnings Per Common Share:
Basic	$ 6.29	$ 3.87	$ 5.59
Diluted	$ 6.25	$ 3.86	$ 5.56
Antidilutive Stock Options and Restricted Stock Outstanding (in shares)	41,802	113,410	4,905

Business Segments - Additional Information (Details)	12 Months Ended
Business Segments - Additional Information (Details)	Dec. 31, 2021 branch atm
Business segment financial information
Federal and state effective tax rate used for segment reporting	26.00%
Consumer Banking
Business segment financial information
Number of branch locations through which products and services are delivered to customers \| branch	54
Number of ATM's through which products and services are delivered to customers \| atm	307

Business Segments - Selected Business Segment Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business segment financial information
Net Interest Income	$ 497,290	$ 496,322	$ 497,715
Provision for Credit Losses	(50,500)	117,800	16,000
Net Interest Income (Loss) After Provision for Credit Losses	547,790	378,522	481,715
Noninterest Income	171,353	184,409	183,338
Noninterest Expense	(393,589)	(373,807)	(379,227)
Income (Loss) Before Provision for Income Taxes	325,554	189,124	285,826
Provision for Income Taxes	(72,182)	(35,320)	(59,913)
Net Income	253,372	153,804	225,913
Total Assets	22,784,941	20,603,651	18,095,496
Consumer Banking
Business segment financial information
Net Interest Income	283,998	292,710	305,803
Provision for Credit Losses	5,764	8,087	11,685
Net Interest Income (Loss) After Provision for Credit Losses	278,234	284,623	294,118
Noninterest Income	131,292	128,400	142,378
Noninterest Expense	(303,699)	(289,177)	(281,662)
Income (Loss) Before Provision for Income Taxes	105,827	123,846	154,834
Provision for Income Taxes	(26,442)	(31,476)	(38,654)
Net Income	79,385	92,370	116,180
Total Assets	7,675,823	7,478,813	7,054,511
Commercial Banking
Business segment financial information
Net Interest Income	194,409	188,626	185,259
Provision for Credit Losses	201	(948)	976
Net Interest Income (Loss) After Provision for Credit Losses	194,208	189,574	184,283
Noninterest Income	30,637	34,523	33,362
Noninterest Expense	(64,470)	(63,294)	(84,616)
Income (Loss) Before Provision for Income Taxes	160,375	160,803	133,029
Provision for Income Taxes	(39,070)	(40,081)	(28,852)
Net Income	121,305	120,722	104,177
Total Assets	5,107,001	5,116,807	4,254,261
Treasury and Other
Business segment financial information
Net Interest Income	18,883	14,986	6,653
Provision for Credit Losses	(56,465)	110,661	3,339
Net Interest Income (Loss) After Provision for Credit Losses	75,348	(95,675)	3,314
Noninterest Income	9,424	21,486	7,598
Noninterest Expense	(25,420)	(21,336)	(12,949)
Income (Loss) Before Provision for Income Taxes	59,352	(95,525)	(2,037)
Provision for Income Taxes	(6,670)	36,237	7,593
Net Income	52,682	(59,288)	5,556
Total Assets	$ 10,002,117	$ 8,008,031	$ 6,786,724

Employee Benefits - Additional Information (Details)	12 Months Ended
Employee Benefits - Additional Information (Details)	Dec. 31, 2021 USD ($) d plan yr Component	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of company contribution components, Retirement Savings Plan \| Component	3
Fixed percentage of employer's contribution based on eligible compensation	3.00%
Employee contribution limit per calendar year (as a percent of compensation)	50.00%
Employer match of employee contributions up to 2% of eligible compensation	1.25%
Percentage of eligible compensation, matched $1.25 for by employer for each dollar amount contributed by participants	2.00%
Employer match of employee contributions over 2% up to 5% of eligible compensation	$ 0.50
Employee's contribution matched by employer (in dollars)	$ 1.00
Percentage of eligible compensation, matched $0.50 for by employer for each dollar amount contributed by participants, low end of range	2.00%
Percentage of eligible compensation, matched $0.50 for by employer for each dollar amount contributed by participants, high end of range	5.00%
Total expense for all components of the company's defined contribution plans	$ 16,000,000.0	$ 14,000,000.0	$ 15,200,000
Effect of market fluctuations in cash flow on target allocation limits (as a percent)	5.00%
Period during which asset allocation is expected to conform to range limits (in days) \| d	90
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities, percentage of variable component in strategic targets (as a percent)	10.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities, percentage of variable component in strategic targets (as a percent)	20.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	60.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	40.00%
Cash \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Effect of market fluctuations in cash flow on target allocation limits (as a percent)	0.00%
Cash \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Effect of market fluctuations in cash flow on target allocation limits (as a percent)	20.00%
Equity Securities, Domestic \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
Equity Securities, Domestic \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	100.00%
Equity Securities, International \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	0.00%
Equity Securities, International \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
S&P 500 Index
Defined Benefit Plan Disclosure [Line Items]
Performance benchmark (as a percent)	36.00%
MSCI EAFE Index
Defined Benefit Plan Disclosure [Line Items]
Performance benchmark (as a percent)	24.00%
Barclays Capital Aggregate Bond Index
Defined Benefit Plan Disclosure [Line Items]
Performance benchmark (as a percent)	40.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans \| plan	2
Actuarial Losses (Gains)	$ 2,817,000	(10,364,000)
Expected future employer contributions, next fiscal year	400,000
Pension Benefits \| Excess Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,300,000	3,600,000
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Retirees' age and above which Medicare supplemental plan subsidy is provided (in years) \| yr	65
Limit on annual credit provided in HRA to eligible employees	$ 1,200,000
Actuarial Losses (Gains)	$ 2,514,000	(3,559,000)
Ultimate health care cost trend rate (as a percent)	4.00%
Ultimate health care cost trend rate period	2045
Expected future employer contributions, next fiscal year	$ 1,400,000
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial Losses (Gains)	(4,300,000)	(9,300,000)
Postemployment Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial Losses (Gains)	$ (1,300,000)	$ (2,900,000)

Employee Benefits - Schedule of Reconciliation of Changes in Benefit Obligation and Fair value of Plan Assets As Well As the Funded Status Recognized in the Consolidated Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Reconciliation of changes in benefit obligations
Benefit Obligation at Beginning of Year	$ 117,647	$ 110,637
Service Cost	0	0	$ 0
Interest Cost	2,924	3,627	4,401
Actuarial Losses (Gains)	(2,817)	10,364
Employer Benefits Paid	(7,169)	(6,981)
Benefit Obligation at End of Year	110,585	117,647	110,637
Reconciliation of changes in fair value of plan assets
Fair Value of Plan Assets at Beginning of Year	97,890	93,638
Actual Return on Plan Assets	10,103	10,764
Employer Contributions	470	469
Employer Benefits Paid	(7,169)	(6,981)
Fair Value of Plan Assets at End of Year	101,294	97,890	93,638
Funded Status at End of Year	(9,291)	(19,757)
Postretirement Benefits
Reconciliation of changes in benefit obligations
Benefit Obligation at Beginning of Year	31,507	27,571
Service Cost	678	578	455
Interest Cost	816	945	1,025
Actuarial Losses (Gains)	(2,514)	3,559
Employer Benefits Paid	(1,217)	(1,146)
Benefit Obligation at End of Year	29,270	31,507	$ 27,571
Reconciliation of changes in fair value of plan assets
Employer Contributions	1,217	1,146
Employer Benefits Paid	(1,217)	(1,146)
Funded Status at End of Year	$ (29,270)	$ (31,507)

Employee Benefits - Schedule of Reconciliation of Changes in Benefit Obligation and Fair value of Plan Assets As Well As the Funded Status Recognized in the Consolidated Statements (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Participants contributions	$ 0.8	$ 0.8

Employee Benefits - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax
Net Actuarial Gains (Losses)	$ (35,014)	$ (43,101)
Net Prior Service Credit	0	0
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax	(35,014)	(43,101)
Postretirement Benefits
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax
Net Actuarial Gains (Losses)	235	(1,613)
Net Prior Service Credit	1,283	1,464
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 1,518	$ (149)

Employee Benefits - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	$ 0	$ 0	$ 0
Interest Cost	2,924	3,627	4,401
Expected Return on Plan Assets	(4,592)	(5,028)	(4,993)
Amortization of Prior Service Credit	0	0	0
Amortization of Net Actuarial Losses (Gains)	2,676	2,318	1,937
Net Periodic Benefit Cost	1,008	917	1,345
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	678	578	455
Interest Cost	816	945	1,025
Expected Return on Plan Assets	0	0	0
Amortization of Prior Service Credit	(246)	(246)	(288)
Amortization of Net Actuarial Losses (Gains)	0	0	(339)
Net Periodic Benefit Cost	$ 1,248	$ 1,277	$ 853

Employee Benefits - Schedule of Assumptions Used to Determine the Benefit Obligations/net Periodic Cost (Details)	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Weighted average assumptions used to determine the benefit obligations
Discount Rate	2.89%	2.55%
Postretirement Benefits
Weighted average assumptions used to determine the benefit obligations
Discount Rate	3.00%	2.66%
Health Care Cost Trend Rate Assumed For Next Year	5.70%	5.50%

Employee Benefits - Schedule of Assumptions Used in Calculation Net Periodic Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Weighted average assumptions used to determine the net periodic benefit cost
Discount Rate	2.55%	3.36%	4.41%
Expected Long-Term Rate of Return on Plan Assets	5.25%	5.75%	5.75%
Health Care Cost Trend Rate	0.00%	0.00%	0.00%
Postretirement Benefits
Weighted average assumptions used to determine the net periodic benefit cost
Discount Rate	2.66%	3.42%	4.48%
Expected Long-Term Rate of Return on Plan Assets	0.00%	0.00%	0.00%
Health Care Cost Trend Rate	5.50%	5.70%	6.00%

Employee Benefits - Schedule of Expected Benefits to be Paid in Each of the Next Five Years and in the Aggregate for the Five Years Thereafter (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Pension Benefits
Expected benefits to be paid in each of the next five years and in the aggregate for the five years thereafter
2022	$ 7,387
2023	7,417
2024	7,399
2025	7,367
2026	7,297
Years 2027-2031	34,473
Postretirement Benefits
Expected benefits to be paid in each of the next five years and in the aggregate for the five years thereafter
2022	1,375
2023	1,423
2024	1,456
2025	1,512
2026	1,549
Years 2027-2031	$ 8,362

Employee Benefits - Schedule of the Fair Values of the Retirement Plan Assets by Asset Category (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 101,294	$ 97,890	$ 93,638
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101,294
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	618	1,079
Cash \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	618
Equity Securities - Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	511	1,849
Equity Securities - Large Cap \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	511
Equity Security - Mutual Funds: Mixed-Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	33,108	29,802
Equity Security - Mutual Funds: Mixed-Cap \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	33,108
Equity Security - Mutual Funds: International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,022	28,055
Equity Security - Mutual Funds: International \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,022
Equity Security - Mutual Funds: Emerging Market
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,786	2,494
Equity Security - Mutual Funds: Emerging Market \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,786
Fixed Income - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36,249	$ 34,611
Fixed Income - Mutual Funds \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 36,249

Share-Based Compensation - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation [Line Items]
Total shares authorized	2,100,000
Shares available for future grants of stock options or restricted stock	1,300,000
Compensation Expense	$ 13,267,000	$ 7,578,000	$ 8,338,000
Stock awards granted during period	0	0	0
Stock Options
Share-based Compensation [Line Items]
Expiration period	10 years
Restricted Stock
Share-based Compensation [Line Items]
Unrecognized compensation cost related to unvested restricted stock	$ 24,000,000.0
Weighted average period during which unrecognized compensation cost is expected to be recognized (in years)	2 years 3 months 10 days
Granted	292,007	161,168	130,093
Restricted Stock \| Minimum [Member]
Share-based Compensation [Line Items]
Vesting period (in years)	1 year
Restricted Stock \| Maximum
Share-based Compensation [Line Items]
Vesting period (in years)	5 years
Restricted Stock Units (RSUs)
Share-based Compensation [Line Items]
Granted	0	0	0
Compensation Expense	$ 0	$ 0	$ 1,000,000.0
Restricted Stock Units (RSUs) \| Minimum [Member]
Share-based Compensation [Line Items]
Vesting period (in years)	3 years
Restricted Stock Units (RSUs) \| Maximum
Share-based Compensation [Line Items]
Vesting period (in years)	4 years

Share-Based Compensation - Schedule of Compensation Expense and Related Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Compensation Expense	$ 13,267	$ 7,578	$ 8,338
Income Tax Benefit	$ 3,520	$ 2,009	$ 2,210

Share-Based Compensation - Schedule of Activity for Restricted Stock (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Shares
Unvested, Beginning Balance	328,769	309,949	314,487
Granted	292,007	161,168	130,093
Vested	(97,278)	(99,894)	(107,759)
Forfeited	(22,962)	(42,454)	(26,872)
Unvested, Ending Balance	500,536	328,769	309,949
Weighted Average Grant Date Fair Value
Unvested, Beginning Balance	$ 82.02	$ 83.75	$ 78.17
Granted	90.23	80.97	82.82
Vested	78.55	84.69	66.46
Forfeited	86.48	84.36	83.34
Unvested, Ending Balance	$ 87.28	$ 82.02	$ 83.75
Grant Date Fair Value of Restricted Stock that Vested During the Year
Vested	$ 8,673	$ 8,544	$ 8,910

Share-Based Compensation - Schedule of Activity for Restricted Stock (Parenthetical) (Details)	Dec. 31, 2021 shares
Service-based Restricted Stock
Share-based Compensation [Line Items]
Unvested shares	138,872

Share-Based Compensation - Schedule of Activity for Restricted Stock Units (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Unvested, Beginning Balance	52,064
Vested	(52,064)
Weighted Average Grant Date Fair Value
Beginning Balance		$ 63.92
Vested	$ 82.23
Grant Date Fair Value of Restricted Stock that Vested During the Year
Vested	$ 4,311

Share-Based Compensation - Schedule of Activity Related to Stock Options (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Stock Options
Stock Options Outstanding, Beginning Balance \| shares	184,054
Exercised \| shares	(165,920)
Expired \| shares	(833)
Stock Options Outstanding, Ending Balance \| shares	17,301
Stock Options Vested and Exercisable as of December 31, 2021 \| shares	17,301
Weighted Average Exercise Price
Outstanding Beginning Balance \| $ / shares	$ 45.28
Exercised \| $ / shares	45.04
Expired \| $ / shares	42.22
Outstanding Ending Balance \| $ / shares	47.72
Stock Options Vested and Exercisable as of December 31, 2021 \| $ / shares	$ 47.72
Weighted Average Remaining Contractual Term
Stock Options Outstanding as of December 31, 2021	1 month 6 days
Stock Options Vested and Exercisable as of December 31, 2021	1 month 6 days
Aggregate Intrinsic Value
Stock Options Outstanding as of December 31, 2021 \| $	$ 624
Stock Options Vested and Exercisable as of December 31, 2021 \| $	$ 624

Share-Based Compensation - Summary of Certain Stock Option Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock options activity
Intrinsic Value of Stock Options Exercised	$ 6,755	$ 2,261	$ 1,106
Cash Received from Stock Options Exercised	7,473	2,438	1,473
Tax Benefits Realized from Stock Options Exercised	$ 1,611	$ 485	$ 727

Income Taxes - Schedule of the Company's Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 58,652	$ 65,840	$ 60,902
State	10,510	12,066	14,426
Total Current	69,162	77,906	75,328
Deferred:
Federal	2,254	(31,783)	(9,630)
State	766	(10,803)	(5,785)
Total Deferred	3,020	(42,586)	(15,415)
Provision for Income Taxes	$ 72,182	$ 35,320	$ 59,913

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Net tax (benefit)/charge recorded directly to consolidated shareholders' equity	$ (26,800)	$ 16,200	$ 7,100
Valuation allowance	3,203	3,597
Base year reserves included in retained earnings	18,200
Unrecognized deferred federal income tax liability	4,800
Amount related to unrecognized tax benefits that if reversed would impact effective tax rate	4,000	5,400
Interest and penalties expense/(benefit) related to the liability for unrecognized tax benefits			$ 500
Balance of accrual for interest and penalties	1,500	1,500
Maximum
Income Tax Contingency [Line Items]
Interest and penalties expense/(benefit) related to the liability for unrecognized tax benefits	$ (100)	$ 100

Income Taxes - Schedule of Significant Components of the Company's Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Liabilities:
Accelerated Depreciation	$ (8,131)	$ (8,042)
Accrued Pension Cost	(11,270)	(11,270)
Federal Home Loan Bank of Des Moines Stock	(2,885)	(3,416)
Lease Transactions	(37,585)	(41,726)
Operating Lease Liabilities	(25,348)	(26,387)
Energy Tax Credits		(674)
Net Unrealized Gains on Investments Securities		(18,407)
Investment in Variable Interest Entities	(1,657)	(2,725)
Deferred Loan Fees	(3,845)	(4,736)
Originated Mortgage Servicing Rights	(6,068)	(5,579)
Other	(915)	(1,124)
Gross Deferred Tax Liabilities	(97,704)	(124,086)
Deferred Tax Assets:
Allowance for Credit Losses	43,348	57,840
Minimum Pension Liability	12,082	13,430
Accrued Expenses	22,416	17,629
Postretirement Benefit Obligations	7,170	7,980
Capital Lease Expenses	2,163	2,168
Operating Lease Right-of-Use Assets	27,360	28,473
Restricted Stock	4,442	3,669
Net Unrealized Losses on Investments Securities	11,868
Deductible State and Local Taxes	3,239	3,366
Low Income Housing Investments	3,007	3,648
Other	6,089	6,204
Gross Deferred Tax Assets Before Valuation Allowance	143,184	144,407
Valuation Allowance	(3,203)	(3,597)
Gross Deferred Tax Assets After Valuation Allowance	139,981	140,810
Net Deferred Tax Assets	$ 42,277	$ 16,724

Income Taxes - Schedule of Reconciliation of the Statutory Federal Income Tax Rate to the Company's Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of the Statutory Federal Income Tax Rate to the Company's Effective Tax Rate
Statutory Federal Income Tax Rate	21.00%	21.00%	21.00%
Increase (Decrease) in Income Tax Rate Resulting From:
State Taxes, Net of Federal Income Tax	2.85%	0.81%	2.53%
Low-Income Housing Investments	0.77%	0.82%	0.60%
Investment Tax Credits	(0.35%)	(1.24%)	(0.84%)
Bank-Owned Life Insurance	(0.48%)	(0.82%)	(0.51%)
Tax-Exempt Income	(0.24%)	(0.50%)	(0.53%)
Leveraged Lease	(0.10%)	(0.56%)	(1.54%)
Other	(1.28%)	(0.83%)	0.25%
Effective Tax Rate	22.17%	18.68%	20.96%

Income Taxes - Schedule of Reconciliation of the Company's Liability for Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of liability for Unrecognized Tax Benefits
Unrecognized Tax Benefits at Beginning of Year	$ 5,403	$ 6,120	$ 5,541
Gross Increases, Related to Tax Positions Taken in a Prior Period	261	374	673
Gross Decreases, Related to Tax Positions Taken in a Prior Period	(1,285)
Gross Increases, Related to Current Period Tax Positions	234	222	715
Lapse of Statute of Limitations	(598)	(1,313)	(809)
Unrecognized Tax Benefits at End of Year	$ 4,015	$ 5,403	$ 6,120

Derivative Financial Instruments - Schedule of the Notional Amount and Fair Value of the Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Interest Rate Lock Commitments
Derivative [Line Items]
Notional Amount	$ 45,857	$ 102,881
Fair Value	1,084	4,947
Forward Commitments
Derivative [Line Items]
Notional Amount	58,523	158,759
Fair Value	(35)	(740)
Receive Fixed / Pay Variable Swap
Derivative [Line Items]
Notional Amount	1,400,322	1,362,778
Fair Value	28,742	90,130
Pay Fixed / Receive Variable Swap
Derivative [Line Items]
Notional Amount	1,400,322	1,362,778
Fair Value	(5,922)	(17,197)
Foreign Exchange Contracts
Derivative [Line Items]
Notional Amount	102,548	90,587
Fair Value	(674)	866
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Notional Amount	131,672	133,286
Fair Value	$ 0	$ 0

Derivative Financial Instruments - Derivative Financial Instruments, their Fair Values, and Balance Sheet Location (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Asset Derivatives	$ 42,011	$ 96,167
Liability Derivatives	18,816	18,161
Interest Rate Lock Commitments
Derivatives Fair Value [Line Items]
Asset Derivatives	1,084	4,947
Liability Derivatives	0	0
Forward Commitments
Derivatives Fair Value [Line Items]
Asset Derivatives	17	0
Liability Derivatives	52	740
Interest Rate Swap Agreements
Derivatives Fair Value [Line Items]
Asset Derivatives	40,733	90,342
Liability Derivatives	17,913	17,409
Foreign Exchange Contracts
Derivatives Fair Value [Line Items]
Asset Derivatives	177	878
Liability Derivatives	$ 851	$ 12

Derivative Financial Instruments - Derivative Financial Instruments and the Amount and Location of the Net Gains or Losses Recognized in the Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	$ 18,392	$ 35,482	$ 19,455
Interest Rate Lock Commitments \| Mortgage Banking Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	8,771	22,348	12,185
Forward Commitments \| Mortgage Banking Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	1,580	(4,274)	(2,340)
Interest Rate Swap Agreements \| Other Noninterest Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	6,579	15,468	7,172
Foreign Exchange Contracts \| Other Noninterest Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	$ 1,462	$ 1,940	2,891
Conversion Rate Swap Agreement \| Investment Securities Gains (Losses), Net
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income			$ (453)

Derivative Financial Instruments - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Net liability positions, aggregate fair value	$ 5,900,000	$ 17,200,000
Liability derivatives	18,816,000	$ 18,161,000
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Liability derivatives	$ 0

Affordable Housing Projects Tax Credit Partnerships - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Method Investments And Joint Ventures [Abstract]
Net affordable housing tax credit investments and related unfunded commitments	$ 134,700,000	$ 138,900,000
Write down from impairment of LIHTC Investments	$ 0	$ 0	$ 0

Affordable Housing Projects Tax Credit Partnerships - Expected Payments for Unfunded Affordable Housing Commitments (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Affordable Housing Tax Credit Investments, Unfunded Commitment [Abstract]
2022	$ 7,553
2023	811
2024	21,432
2025	756
2026	81
Thereafter	13,332
Total Unfunded Commitments	$ 43,965

Affordable Housing Projects Tax Credit Partnerships - Tax Credits and Other Tax Benefits Recognized and Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Yield Method
Tax credits and other tax benefits recognized	$ 8,604	$ 11,752	$ 11,719
Amortization Expense in Provision for Income Taxes	6,700	8,586	7,566
Proportional Amortization Method
Tax credits and other tax benefits recognized	10,831	6,633	3,014
Amortization Expense in Provision for Income Taxes	$ 9,375	$ 5,729	$ 2,578

Securities Sold Under Agreements to Repurchase - Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	$ 450,490	$ 600,590
Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	490	590
Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	52,092	103,809
Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	397,908	496,191
Maturity Up To 90 Days
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		100
Maturity Up To 90 Days \| Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		100
Maturity 1 To 3 Years
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	275,000	25,000
Maturity 1 To 3 Years \| Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	38,685	20,210
Maturity 1 To 3 Years \| Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	236,315	4,790
Maturity After 3 Years
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	175,490	575,490
Maturity After 3 Years \| Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	490	490
Maturity After 3 Years \| Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	13,407	83,599
Maturity After 3 Years \| Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	$ 161,593	$ 491,401

Securities Sold Under Agreements to Repurchase - Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 450,490	$ 600,590
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	450,490	600,590
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	450,490	600,590
Private Institutions
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	450,000	600,000
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	450,000	600,000
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	450,000	600,000
Government Entities
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	490	590
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	490	590
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	490	590
Interest Rate Swap Agreements \| Institutional Counterparties
Assets:
Gross Amounts of Recognized Assets	26	5
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	26	5
Netting Adjustments per Master Netting Arrangements	26	5
Gross Amounts Not Offset in the Statements of Condition - FV of collateral pledged	0	0
Derivative Assets, Net Amount	0	0
Liabilities:
Gross Amounts of Recognized Liabilities	5,948	17,202
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	5,948	17,202
Derivative Liability, Netting Adjustments per Master Netting Arrangements	26	5
Derivative, Collateral, Right to Reclaim Securities	5,922	7,911
Derivative Liabilities, Net Amount	$ 0	$ 9,286

Securities Sold Under Agreements to Repurchase - Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Interest Rate Swap Agreements
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 58.3	$ 7.9
Private Institutions
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	523.4	635.2
Government Entities
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 1.3	$ 2.5

Commitments, Contingencies, and Guarantees - Credit Commitments (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Credit Commitments [Line Items]
Credit Commitments	$ 3,136,796
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	2,982,673
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	135,167
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	$ 18,956

Commitments, Contingencies, and Guarantees - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
	Dec. 06, 2019	Dec. 31, 2021	Dec. 31, 2020
Class Settlement \| Settled Litigation
Representations and Warranties [Line Items]
Litigation settlement amount	$ 8.0
Litigation settlement, amount awarded from other party	$ 2.0		$ 8.0
Standby Letters of Credit
Representations and Warranties [Line Items]
Assets secured for standby letters of credit		$ 103.0
Standby and Commercial Letters of Credit \| Minimum [Member]
Representations and Warranties [Line Items]
Standby and commercial letters of credit remaining term		1 month
Standby and Commercial Letters of Credit \| Maximum
Representations and Warranties [Line Items]
Standby and commercial letters of credit remaining term		14 months

Fair Value of Assets and Liabilities - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Available-for-Sale: Fair Value	$ 4,276,056	$ 3,791,689	$ 2,619,003
Loans Held for Sale	26,746	82,565
Derivatives	42,011	96,167
Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	75,818	24,840	55,097
Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,780	1,062	22,147
Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	383,113	224,605	336,321
Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,319,042	1,594,815	1,172,826
Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	2,090,326	1,518,283	586,761
Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	155,890	253,839	224,720
Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,565,258	3,366,937	$ 1,984,307
Fair Value, Measurements, Recurring
Assets:
Available-for-Sale: Fair Value	4,276,056	3,791,689
Loans Held for Sale	26,746	82,565
Mortgage Servicing Rights	800	958
Other Assets	56,411	53,410
Derivatives	42,011	96,167
Total Assets Measured at Fair Value on a Recurring Basis	4,402,024	4,024,789
Liabilities:
Derivatives	18,816	18,161
Total Liabilities Measured at Fair Value on a Recurring Basis	18,816	18,161
Fair Value, Measurements, Recurring \| Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	250,087	174,245
Fair Value, Measurements, Recurring \| Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	75,818	24,840
Fair Value, Measurements, Recurring \| Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,780	1,062
Fair Value, Measurements, Recurring \| Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	383,113	224,605
Fair Value, Measurements, Recurring \| Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,319,042	1,594,815
Fair Value, Measurements, Recurring \| Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	2,090,326	1,518,283
Fair Value, Measurements, Recurring \| Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	155,890	253,839
Fair Value, Measurements, Recurring \| Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,565,258	3,366,937
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)
Assets:
Available-for-Sale: Fair Value	114,845	921
Loans Held for Sale	0	0
Mortgage Servicing Rights	0	0
Other Assets	56,411	53,410
Derivatives	0	0
Total Assets Measured at Fair Value on a Recurring Basis	171,256	54,331
Liabilities:
Derivatives	0	0
Total Liabilities Measured at Fair Value on a Recurring Basis	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	114,845	921
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Assets:
Available-for-Sale: Fair Value	4,161,211	3,790,768
Loans Held for Sale	26,746	82,565
Mortgage Servicing Rights	0	0
Other Assets	0	0
Derivatives	194	878
Total Assets Measured at Fair Value on a Recurring Basis	4,188,151	3,874,211
Liabilities:
Derivatives	903	752
Total Liabilities Measured at Fair Value on a Recurring Basis	903	752
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	135,242	173,324
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	75,818	24,840
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,780	1,062
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	383,113	224,605
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,319,042	1,594,815
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	2,090,326	1,518,283
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	155,890	253,839
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,565,258	3,366,937
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3)
Assets:
Available-for-Sale: Fair Value	0	0
Loans Held for Sale	0	0
Mortgage Servicing Rights	800	958
Other Assets	0	0
Derivatives	41,817	95,289
Total Assets Measured at Fair Value on a Recurring Basis	42,617	96,247
Liabilities:
Derivatives	17,913	17,409
Total Liabilities Measured at Fair Value on a Recurring Basis	17,913	17,409
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring \| Significant Other Unobservable Inputs (Level 3) \| Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	$ 0	$ 0

Fair Value of Assets and Liabilities - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation Calculation Roll Forward
Fair Value, Mortgage Servicing Rights, Beginning Balance	$ 958	$ 1,126
Fair Value, Mortgage Servicing Rights, Realized and Unrealized Net Gains (Losses) Included in Net Income	(158)	(168)
Fair Value, Mortgage Servicing Rights, Ending Balance	800	958
Fair Value, Mortgage Service Rights, Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	0	0
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation Roll Forward
Fair Value, Net Derivative Assets and Liabilities, Beginning Balance	77,880	22,573
Fair Value, Net Derivative Assets and Liabilities, Realized and Unrealized Net Gains (Losses) Included in Net Income	8,848	22,219
Fair Value, Net Derivative Assets and Liabilities, Transfers to Loans Held for Sale	(12,634)	(18,681)
Variation margin payments for swap liabilities	(50,190)	51,769
Fair Value, Net Derivative Assets and Liabilities, Ending Balance	23,904	77,880
Fair Value, Net Derivative Assets and Liabilities,Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	$ 23,904	$ 77,880

Fair Value of Assets and Liabilities - Summary of the Significant Unobservable Inputs (Details) - Significant Other Unobservable Inputs (Level 3) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Discounted Cash Flow \| Interest Rate Swap Agreements
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ 22,820	$ 72,933
Discounted Cash Flow \| Mortgage Servicing Rights
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, at Fair Value	22,251	19,652
Pricing Model \| Interest Rate Lock Commitments
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ 1,084	$ 4,947
Weighted Average Constant Prepayment Rate (as a percent) \| Discounted Cash Flow \| Mortgage Servicing Rights
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.1070	0.1442
Weighted Average Discount Rate (as a percent) \| Discounted Cash Flow
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0704	0.0581
Weighted Average Closing Ratio (as a percent) \| Pricing Model \| Interest Rate Lock Commitments
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.9047	0.9076
Weighted Average Credit Factor (as a percent) \| Discounted Cash Flow \| Interest Rate Swap Agreements
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.0014	0.0029
Minimum \| Discounted Cash Flow \| Mortgage Servicing Rights
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Discount Rate	6.51%
Minimum \| Weighted Average Discount Rate (as a percent) \| Discounted Cash Flow
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0649
Minimum \| Weighted Average Closing Ratio (as a percent) \| Pricing Model \| Interest Rate Lock Commitments
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.7540
Minimum \| Weighted Average Credit Factor (as a percent) \| Discounted Cash Flow \| Interest Rate Swap Agreements
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.0000
Maximum \| Discounted Cash Flow \| Mortgage Servicing Rights
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Discount Rate	11.48%
Maximum \| Weighted Average Discount Rate (as a percent) \| Discounted Cash Flow
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0708
Maximum \| Weighted Average Closing Ratio (as a percent) \| Pricing Model \| Interest Rate Lock Commitments
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	1.0000
Maximum \| Weighted Average Credit Factor (as a percent) \| Discounted Cash Flow \| Interest Rate Swap Agreements
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.0049

Fair Value of Assets and Liabilities - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Details) - Significant Other Unobservable Inputs (Level 3) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Carrying Amount	$ 21,451	$ 18,694
Valuation Allowance	$ (1,829)	$ (3,892)

Fair Value of Assets and Liabilities - Schedule of Difference between Aggregate Fair Value and Aggregate Unpaid Principal Balance (Details) - Residential mortgage loans held for sale - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value Option Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 26,746	$ 82,565
Aggregate Unpaid Principal	26,309	78,577
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 437	$ 3,988

Fair Value of Assets and Liabilities - Schedule of Carrying Amount, Fair Value, and Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Instruments – Assets
Held-to-Maturity: Fair Value	$ 4,646,619	$ 3,348,693	$ 3,062,882
Carrying Amount
Financial Instruments – Assets
Held-to-Maturity: Fair Value	4,694,780	3,262,727
Loans	11,921,869	11,536,011
Financial Instruments – Liabilities
Time Deposits	1,000,089	1,662,063
Securities Sold Under Agreements to Repurchase	450,490	600,590
Other Debt		50,000
Fair Value
Financial Instruments – Assets
Held-to-Maturity: Fair Value	4,646,619	3,348,693
Loans	12,094,631	12,019,151
Financial Instruments – Liabilities
Time Deposits	998,134	1,667,774
Securities Sold Under Agreements to Repurchase	469,293	649,039
Other Debt		51,546
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) \| Fair Value
Financial Instruments – Assets
Held-to-Maturity: Fair Value	131,139	7,500
Loans	0	0
Financial Instruments – Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	0	0
Other Debt		0
Significant Other Observable Inputs (Level 2) \| Fair Value
Financial Instruments – Assets
Held-to-Maturity: Fair Value	4,515,480	3,341,193
Loans	0	0
Financial Instruments – Liabilities
Time Deposits	998,134	1,667,774
Securities Sold Under Agreements to Repurchase	469,293	649,039
Other Debt		51,546
Significant Other Unobservable Inputs (Level 3) \| Fair Value
Financial Instruments – Assets
Held-to-Maturity: Fair Value	0	0
Loans	12,094,631	12,019,151
Financial Instruments – Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	$ 0	0
Other Debt		$ 0

Revenue Recognition - Summary of Noninterest Income Segregated by Revenue Streams In-Scope and Out-of-Scope of Topic 606 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Service Charges on Deposit Accounts	$ 25,564	$ 24,910	$ 30,074
Fees, Exchange, and Other Service Charges	55,457	47,056	57,893
Annuity and Insurance	3,224	3,362	6,934
Other	19,589	30,434	27,489
Noninterest Income	171,353	184,409	183,338
Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Noninterest Income	171,353	184,409	183,338
Accounting Standards Update 2014-09 \| Noninterest Income In Scope of Topic 606
Disaggregation of Revenue [Line Items]
Trust and Asset Management	46,068	43,456	44,233
Service Charges on Deposit Accounts	12,181	11,715	13,042
Fees, Exchange, and Other Service Charges	41,962	36,005	46,381
Annuity and Insurance	3,130	3,249	6,813
Other	8,684	8,626	9,633
Noninterest Income	112,025	103,051	120,102
Accounting Standards Update 2014-09 \| Noninterest Income Out of Scope of Topic 606
Disaggregation of Revenue [Line Items]
Noninterest Income	$ 59,328	$ 81,358	$ 63,236

Revenue Recognition - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Contract balances	$ 0	$ 0

Leases - Additional Information (Details) $ in Millions		12 Months Ended
Leases - Additional Information (Details) $ in Millions	Jan. 22, 2021 USD ($) branch	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating lease, existence of option to extend		true
Operating lease, option to extend		through 2052
Sublease, existence of option to extend		true
Sublease, option to extend		through 2033
Rental income from operating leases, including subleases		$ 9.8	$ 10.3	$ 10.7
Board of Directors
Lessee Lease Description [Line Items]
Total charge related to branch closure	$ 5.6
Number or branches closed permanently \| branch	12
Write off impairment charge, right-of-use assets	$ 2.5

Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Lease Right-of-Use Assets
Operating Lease Right-of-Use Assets	$ 95,621	$ 99,542
Finance lease right-of-use assets	$ 2,232	$ 2,304
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total Lease Right-of-Use Assets	$ 97,853	$ 101,846
Lease Liabilities
Operating Lease Liabilities	103,210	107,412
Finance Lease Obligations	$ 10,391	$ 10,481
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherLongTermDebtNoncurrent	us-gaap:OtherLongTermDebtNoncurrent
Total Lease Liabilities	$ 113,601	$ 117,893

Leases - Schedule of Lease Cost and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Weighted-Average Remaining Lease Term
Operating leases	16 years 4 months 24 days	17 years
Finance leases	31 years	32 years
Weighted-Average Discount Rate
Operating leases	3.57%	3.61%
Finance leases	7.04%	7.04%
Lease Costs
Operating lease cost	$ 11,493	$ 12,281
Variable lease cost	2,954	5,549
Short-term lease cost	407	587
Interest on lease liabilities 1	735	741
Amortization of right-of-use assets	72	72
Sublease income	(7,452)	(7,804)
Net Lease Costs	8,209	11,426
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	13,741	12,349
Operating cash flows from finance leases	735	741
Financing cash flows from finance leases	90	84
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 12,207	$ 11,185

Leases - Future Minimum Payments for Finance Leases and Operating Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finance Leases
2022	$ 825
2023	825
2024	825
2025	825
2026	825
Thereafter	21,455
Total Future Minimum Lease Payments	25,580
Amounts Representing Interest	(15,189)
Finance Lease Obligations	10,391	$ 10,481
Operating Leases
2022	11,100
2023	10,298
2024	9,430
2025	8,852
2026	7,618
Thereafter	92,849
Total Future Minimum Lease Payments	140,147
Amounts Representing Interest	(36,937)
Operating Lease Liabilities	$ 103,210	$ 107,412

Leases - Future Minimum Rental Income under Operating Leases Including Subleases (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Leases [Abstract]
2022	$ 5,807
2023	4,382
2024	2,829
2025	1,919
2026	1,232
Thereafter	3,635
Total	$ 19,804

Bank of Hawaii Corporation Financial Statements - Schedule of Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements Captions [Line Items]
Investment Securities Gains (Losses), Net	$ (1,297)	$ 9,932	$ (3,986)
Noninterest Expense
Total Noninterest Expense	393,589	373,807	379,227
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries	325,554	189,124	285,826
Income Tax Benefit (Expense)	72,182	35,320	59,913
Net Income	253,372	153,804	225,913
Comprehensive Income	179,168	192,738	245,844
Parent Company
Condensed Financial Statements Captions [Line Items]
Dividends from Bank of Hawaii	62,000	134,000	220,000
Investment Securities Gains (Losses), Net	(948)	13,336	(850)
Other Income and Interest on Investment	6	154	261
Total Income	61,058	147,490	219,411
Noninterest Expense
Intercompany Salaries and Services	764	758	768
Other Expenses	1,787	1,864	1,682
Total Noninterest Expense	2,551	2,622	2,450
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries	58,507	144,868	216,961
Income Tax Benefit (Expense)	(2,131)	2,395	(1,818)
Equity in Undistributed Income of Subsidiaries	192,734	11,331	7,134
Net Income	253,372	153,804	225,913
Comprehensive Income	$ 179,168	$ 192,738	$ 245,844

Bank of Hawaii Corporation Financial Statements - Schedule of Condensed Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Investment Securities Held-to-Maturity	$ 4,694,780	$ 3,262,727	$ 3,042,294
Goodwill	31,517	31,517
Other Assets	384,727	435,293
Total Assets	22,784,941	20,603,651	18,095,496
Liabilities
Other Liabilities	196,237	190,263
Total Liabilities	21,173,330	19,229,144
Common Shareholders’ Equity	1,611,611	1,374,507	$ 1,286,832	$ 1,268,200
Total Liabilities and Shareholders’ Equity	22,784,941	20,603,651
Parent Company
Assets
Cash with Bank of Hawaii	6,376	66,704
Investment Securities Held-to-Maturity	2,500	2,501
Goodwill	14,129	14,129
Other Assets	14,130	12,305
Equity in Net Assets of Subsidiaries	1,586,473	1,290,455
Total Assets	1,623,608	1,386,094
Liabilities
Income Taxes Payable	38	974
Other Liabilities	11,959	10,613
Total Liabilities	11,997	11,587
Common Shareholders’ Equity	1,611,611	1,374,507
Total Liabilities and Shareholders’ Equity	$ 1,623,608	$ 1,386,094

Bank of Hawaii Corporation Financial Statements - Schedule of Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net Income	$ 253,372	$ 153,804	$ 225,913
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Share-Based Compensation	13,267	7,578	8,337
Net (Gains) Losses on Investment Securities	1,297	(9,932)	3,986
Net Change in Other Assets and Other Liabilities	27,989	(127,934)	(20,039)
Net Cash Provided by Operating Activities	377,151	146,416	234,238
Investing Activities
Purchases	(2,676,376)	(1,661,180)	(1,380,430)
Net Cash Used in Investing Activities	(2,423,334)	(2,373,282)	(773,268)
Financing Activities
Proceeds from Issuance of Common Stock	13,611	9,389	7,872
Proceeds from Issuance of Preferred Stock	175,487
Repurchase of Common Stock	(31,258)	(18,006)	(137,649)
Cash Dividends Paid on Common Stock	(110,633)	(107,434)	(105,478)
Cash Dividends Paid on Preferred Stock	(2,975)
Net Cash Provided by Financing Activities	1,992,529	2,282,296	571,719
Net Change in Cash and Cash Equivalents	(53,654)	55,430	32,689
Cash and Cash Equivalents at Beginning of Period	614,088	558,658	525,969
Cash and Cash Equivalents at End of Period	560,434	614,088	558,658
Parent Company
Operating Activities
Net Income	253,372	153,804	225,913
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Share-Based Compensation	779	795	760
Net (Gains) Losses on Investment Securities	948	(13,336)	850
Equity in Undistributed Income of Subsidiaries	(192,734)	(11,331)	(7,134)
Net Change in Other Assets and Other Liabilities	(977)	(68)	(135)
Net Cash Provided by Operating Activities	61,388	129,864	220,254
Investing Activities
Capital Contributions to the Bank	(165,000)
Proceeds from (Expenses related to) Sales of Investment Securities	(948)	18,336	4,259
Purchases		(2,501)	(4,933)
Net Cash Used in Investing Activities	(165,948)	15,835	(674)
Financing Activities
Proceeds from Issuance of Common Stock	13,611	9,389	7,872
Proceeds from Issuance of Preferred Stock	175,487
Repurchase of Common Stock	(31,258)	(18,006)	(137,649)
Cash Dividends Paid on Common Stock	(110,633)	(107,434)	(105,478)
Cash Dividends Paid on Preferred Stock	(2,975)
Net Cash Provided by Financing Activities	44,232	(116,051)	(235,255)
Net Change in Cash and Cash Equivalents	(60,328)	29,648	(15,675)
Cash and Cash Equivalents at Beginning of Period	66,704	37,056	52,731
Cash and Cash Equivalents at End of Period	$ 6,376	$ 66,704	$ 37,056