Bank of Hawaii (BOH) 10-Q 26 Apr 21 2021 Q1 Quarterly report Financial data

Cover page

Cover page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 20, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-6887
Entity Registrant Name	BANK OF HAWAII CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	99-0148992
Entity Address, Address Line One	130 Merchant Street
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	888
Local Phone Number	643-3888
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		40,394,324
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000046195
Current Fiscal Year End Date	--12-31
Amendment Flag	false
NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	BOH
Security Exchange Name	NYSE

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest Income
Interest and Fees on Loans and Leases	$ 99,299	$ 108,210
Income on Investment Securities
Available-for-Sale	15,837	16,711
Held-to-Maturity	13,300	19,252
Deposits	7	9
Funds Sold	137	546
Other	185	218
Total Interest Income	128,765	144,946
Interest Expense
Deposits	4,329	14,260
Securities Sold Under Agreements to Repurchase	3,533	4,025
Funds Purchased	1	72
Short-Term Borrowings		39
Other Debt	333	584
Total Interest Expense	8,196	18,980
Net Interest Income	120,569	125,966
Provision for Credit Losses	(14,300)	33,600
Net Interest Income After Provision for Credit Losses	134,869	92,366
Noninterest Income
Trust and Asset Management	11,278	10,915
Mortgage Banking	5,862	2,695
Service Charges on Deposit Accounts	6,128	7,451
Fees, Exchange, and Other Service Charges	13,607	13,200
Investment Securities Gains (Losses), Net	(1,203)	(970)
Annuity and Insurance	702	928
Bank-Owned Life Insurance	1,917	1,580
Other	4,679	10,350
Total Noninterest Income	42,970	46,149
Noninterest Expense
Salaries and Benefits	56,251	54,463
Net Occupancy	9,090	8,955
Net Equipment	8,878	8,456
Data Processing	6,322	4,788
Professional Fees	3,406	3,208
FDIC Insurance	1,654	1,456
Other	13,264	14,986
Total Noninterest Expense	98,865	96,312
Income Before Provision for Income Taxes	78,974	42,203
Provision for Income Taxes	19,025	7,461
Net Income	$ 59,949	$ 34,742
Basic Earnings Per Share	$ 1.51	$ 0.88
Diluted Earnings Per Share	1.50	0.87
Dividends Declared Per Share	$ 0.67	$ 0.67
Basic Weighted Average Shares	39,827,590	39,681,611
Diluted Weighted Average Shares	40,071,477	39,916,986

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 59,949	$ 34,742
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) on Investment Securities	(50,050)	41,559
Defined Benefit Plans	441	374
Total Other Comprehensive Income (Loss)	(49,609)	41,933
Comprehensive Income	$ 10,340	$ 76,675

Consolidated Statements of Cond

Consolidated Statements of Condition (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Interest-Bearing Deposits in Other Banks	$ 4,506	$ 1,646
Funds Sold	1,101,631	333,022
Investment Securities
Available-for-Sale	4,024,763	3,791,689
Held-to-Maturity (Fair Value of $3,477,346 and $3,348,693)	3,464,360	3,262,727
Loans Held for Sale	18,320	82,565
Loans and Leases	12,140,703	11,940,020
Allowance for Credit Losses	(198,343)	(216,252)
Net Loans and Leases	11,942,360	11,723,768
Total Earning Assets	20,555,940	19,195,417
Cash and Due From Banks	286,717	279,420
Premises and Equipment, Net	198,107	199,695
Operating Lease Right-of-Use Assets	97,750	99,542
Accrued Interest Receivable	47,917	49,303
Foreclosed Real Estate	2,332	2,332
Mortgage Servicing Rights	22,320	19,652
Goodwill	31,517	31,517
Bank-Owned Life Insurance	291,764	291,480
Other Assets	412,907	435,293
Total Assets	21,947,271	20,603,651
Deposits
Noninterest-Bearing Demand	6,227,436	5,749,612
Interest-Bearing Demand	4,379,243	4,040,733
Savings	7,474,580	6,759,213
Time	1,475,392	1,662,063
Total Deposits	19,556,651	18,211,621
Securities Sold Under Agreements to Repurchase	600,490	600,590
Other Debt	60,459	60,481
Operating Lease Liabilities	105,820	107,412
Retirement Benefits Payable	50,687	51,197
Accrued Interest Payable	4,109	5,117
Taxes Payable and Deferred Taxes	15,599	2,463
Other Liabilities	193,235	190,263
Total Liabilities	20,587,050	19,229,144
Shareholders’ Equity
Common Stock ($.01 par value; authorized 500,000,000 shares; issued / outstanding: March 31, 2021 - 58,553,365 /40,394,234 and December 31, 2020 - 58,285,624 / 40,119,312)	580	580
Capital Surplus	594,804	591,360
Accumulated Other Comprehensive Income (Loss)	(41,787)	7,822
Retained Earnings	1,844,057	1,811,979
Treasury Stock, at Cost (Shares; March 31, 2021 - 18,159,131 and December 31, 2020 - 18,166,312)	(1,037,433)	(1,037,234)
Total Shareholders’ Equity	1,360,221	1,374,507
Total Liabilities and Shareholders’ Equity	$ 21,947,271	$ 20,603,651

Consolidated Statements of Co_2

Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Held-to-Maturity: Fair Value	$ 3,477,346	$ 3,348,693
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, authorized (in shares)	500,000,000	500,000,000
Common Stock, issued (in shares)	58,553,365	58,285,624
Common Stock, outstanding (in shares)	40,394,234	40,119,312
Treasury Stock (in shares)	18,159,131	18,166,312

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2019	$ 1,286,832	$ 3,632	$ 579	$ 582,566	$ (31,112)	$ 1,761,415	$ 3,632	$ (1,026,616)
Beginning Balance (in shares) at Dec. 31, 2019			40,039,695
Increase (decrease) in shareholders' equity
Net Income	34,742					34,742
Other Comprehensive Income (Loss)	$ 41,933				41,933
Accounting Standards Update Extensible List	Accounting Standards Update 2016-13
Share-Based Compensation	$ 1,497			1,497
Common Stock Issued under Purchase and Equity Compensation Plans	3,761			329		653		2,779
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			154,091
Common Stock Repurchased	(17,633)							(17,633)
Common Stock Repurchased (in shares)			(197,276)
Cash Dividends Declared (per share)	(26,835)					(26,835)
Balance at End of Period at Mar. 31, 2020	1,327,929		$ 579	584,392	10,821	1,773,607		(1,041,470)
Ending Balance (in shares) at Mar. 31, 2020			39,996,510
Balance at Beginning of Period at Dec. 31, 2020	$ 1,374,507		$ 580	591,360	7,822	1,811,979		(1,037,234)
Beginning Balance (in shares) at Dec. 31, 2020	40,119,312		40,119,312
Increase (decrease) in shareholders' equity
Net Income	$ 59,949					59,949
Other Comprehensive Income (Loss)	(49,609)				(49,609)
Share-Based Compensation	2,780			2,780
Common Stock Issued under Purchase and Equity Compensation Plans	2,809			664		(845)		2,990
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			310,905
Common Stock Repurchased	(3,189)							(3,189)
Common Stock Repurchased (in shares)			(35,983)
Cash Dividends Declared (per share)	(27,026)					(27,026)
Balance at End of Period at Mar. 31, 2021	$ 1,360,221		$ 580	$ 594,804	$ (41,787)	$ 1,844,057		$ (1,037,433)
Ending Balance (in shares) at Mar. 31, 2021	40,394,234		40,394,234

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Stockholders Equity [Abstract]
Dividends Declared Per Share	$ 0.67	$ 0.67

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net Income	$ 59,949	$ 34,742
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	(14,300)	33,600
Depreciation and Amortization	5,238	4,767
Amortization of Deferred Loan and Lease (Fees) Costs, Net	(2,486)	462
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	8,878	5,164
Amortization of Operating Lease Right-of-Use Assets	2,839	3,114
Share-Based Compensation	2,780	1,497
Benefit Plan Contributions	(470)	(403)
Deferred Income Taxes	6,397	(6,942)
Net Gains on Sales of Loans and Leases	(6,558)	(1,956)
Net Losses (Gains) on Sales of Investment Securities	1,203	970
Proceeds from Sales of Loans Held for Sale	171,763	129,913
Originations of Loans Held for Sale	(102,017)	(110,415)
Net Tax Benefits from Share-Based Compensation	331	524
Net Change in Other Assets and Other Liabilities	48,860	(99,892)
Net Cash Provided by (Used In) Operating Activities	182,407	(4,855)
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities	289,659	230,435
Purchases	(594,678)	(238,997)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	325,969	236,134
Purchases	(533,839)	(201,130)
Net Change in Loans and Leases	(204,500)	(364,878)
Purchases of Premises and Equipment	(3,649)	(12,607)
Net Cash Used in Investing Activities	(721,038)	(351,043)
Financing Activities
Net Change in Deposits	1,345,030	270,879
Net Change in Short-Term Borrowings	(100)	148,900
Repayments of Long-Term Debt	(22)	(25,020)
Proceeds from Issuance of Common Stock	2,704	3,658
Repurchase of Common Stock	(3,189)	(17,633)
Cash Dividends Paid	(27,026)	(26,835)
Net Cash Provided by Financing Activities	1,317,397	353,949
Net Change in Cash and Cash Equivalents	778,766	(1,949)
Cash and Cash Equivalents at Beginning of Period	614,088	558,658
Cash and Cash Equivalents at End of Period	1,392,854	556,709
Supplemental Information
Cash Paid for Interest	9,204	19,088
Cash Paid for Income Taxes	$ 2,771	$ 3,459

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 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 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”). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. Intercompany accounts and transactions have been eliminated in consolidation. Certain prior period information has been reclassified to conform to the current period presentation. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for the full fiscal year or for any future period. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and accompanying notes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. Use of Estimates in the Preparation of Financial Statements 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. 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 (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses or the right to receive benefits that could be significant to the VIE. The Company participates in limited partnerships or limited liability companies that sponsor low-income housing projects. These entities 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 entity, the low-income residency targets must be maintained. For pre-2015 investments, 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. Beginning January 1, 2015, new investments that meet the requirements of the proportional amortization are recognized based on this method. Unfunded commitments to fund these low-income housing entities were $44.6 million and $53.0 million as of March 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 6 Affordable Housing Projects Tax Credit Partnerships 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 $138.4 million and $143.0 million as of March 31, 2021, and December 31, 2020, respectively, and is included in other assets in the consolidated statements of condition. 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). 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 considers future economic conditions and portfolio performance as part of a reasonable and supportable forecast period. 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 a qualitative adjustment 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. As of the January 1, 2020, implementation date, and following the one-year R&S loss forecast period, the Company chose a reversion back to average historical loss rates using a straight line method based on forecasted and relatively benign economic conditions at the measurement date, with the exception of the home equity portfolio. For the home equity portfolio, the Company elected to revert back to average historical loss rates using a straight line method over the halfway point of the average life of the portfolio. The halfway point is used for the home equity portfolio given the longer average life length compared to the other consumer portfolios. Since the first quarter of 2020, 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 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. The Company also carries a limited portfolio of HTM municipal bonds. As of March 31, 2021, the entire portfolio consisted of State of Hawaii bonds carrying a Moody’s rating of Aa2, with a portion of these bonds escrowed to maturity. To estimate the expected credit losses, the Company utilized the probability of default (“PD”)/loss given default (“LGD”) methodology. The PD, which represents the percentage likelihood that a bond will default over a given time period, is primarily based upon the bond’s current credit rating and maturity and computed using Moody’s rating transition matrix, which provides the probability of a rating migrating to default within a one-year period (adjustments are made for longer maturities). The LGD, which represents the percentage of loss if a default occurs, is based on the median recovery rate for municipals according to Moody’s. The Company’s exposure at default, represented by the carrying value of the municipal bond portfolio, is multiplied with the PD and the LGD to arrive at the expected credit loss. Management may exercise discretion to make adjustments based on environmental factors. As of March 31, 2021, the Company determined that the expected credit loss on its municipal bond portfolio was de minimis, and therefore, an allowance for credit losses was not recorded. See Note 3 Investment 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 March 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 Accrued Interest Receivable (“AIR”) Upon adoption of ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments” • Presenting AIR separately within another consolidated statements of condition line item. • Excluding AIR that is included in the amortized cost of financing receivables from related disclosure requirements. • Continuing our policy to write off AIR by reversing interest income. For commercial loans, the write off typically occurs upon becoming 90 days past due. For consumer loans, the write off typically occurs upon becoming 120 days past due. Historically, the Company has not experienced uncollectible AIR on its investment securities. However, the Company would generally write off AIR by reversing interest income if the Company does not reasonably expect to receive payments. Due to the timely manner in which AIR is written off, the amounts of such write offs are immaterial. • Not measuring an allowance for credit losses for AIR due to the Company’s policy of writing off uncollectible AIR in a timely manner, as described above. • The Company began offering loan modifications to assist borrowers negatively impacted by the COVID-19 national emergency. In general, the Company does not classify such loans as nonperforming and continues to accrue and recognize interest income during the forbearance period. For these loans, the Company evaluates the need to record an allowance for the related AIR as any amounts that may become uncollectible may not be considered written off in a timely manner. As of March 31, 2021, and December 31, 2020, the Company recorded an AIR allowance of $2.4 million and $2.7 million, respectively. The allowance was recorded as a contra-asset against AIR with the offset to provision for credit losses. In addition, the Company elected to deduct the AIR from the AIR allowance (rather than reversing interest income) when the AIR is deemed uncollectible, which generally occurs when the related loan is placed on nonaccrual status or is charged-off. See the Operating, Accounting and Reporting Considerations related to COVID-19 section below for further discussion on COVID-19 loan modifications. 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”) 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), with adjustments to the reserve recognized in provision for credit losses in the consolidated statements of income. 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. Operating, Accounting and Reporting Considerations related to COVID-19 The COVID-19 pandemic has negatively impacted the global economy, including Hawaii and the Pacific Islands. In response to this crisis, the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was passed by Congress and signed into law on March 27, 2020. The CARES Act, along with subsequent relief programs, provided substantial funding to fight the COVID-19 pandemic and stimulate the economy by supporting individuals and businesses through loans, grants, tax changes, and other types of relief. Some of the provisions applicable to the Company include, but are not limited to: • Accounting for Loan Modifications – Section 4013 of the CARES Act provides that a financial institution may elect to suspend (1) the requirements under GAAP for certain loan modifications that would otherwise be categorized as a TDR and (2) any determination that such loan modifications would be considered a TDR, including the related impairment for accounting purposes. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. • Paycheck Protection Program - The CARES Act established the Paycheck Protection Program (“PPP”), an expansion of the Small Business Administration’s (“SBA”) 7(a) loan program and the Economic Injury Disaster Loan Program (“EIDL”), administered directly by the SBA. On December 27, 2020, the Consolidated Appropriations Act, 2021 (“CAA”) was signed into law. The CAA provides several amendments to the PPP, including additional funding for first and second draws of PPP loans up to March 31, 2021. On March 30, 2021, the PPP Extension Act of 2021 was signed into law, which extends the program to May 31, 2021. The Company is a participant in the PPP. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. Also in response to the COVID-19 pandemic, the Board of Governors of the Federal Reserve System (“FRB”), the Federal Deposit Insurance Corporation (“FDIC”), the National Credit Union Administration (“NCUA”), the Office of the Comptroller of the Currency (“OCC”), and the Consumer Financial Protection Bureau (“CFPB”), in consultation with the state financial regulators (collectively, the “agencies”) issued a joint interagency statement (issued March 22, 2020; revised statement issued April 7, 2020). Some of the provisions applicable to the Company include, but are not limited to: • Accounting for Loan Modifications - Loan modifications that do not meet the conditions of the CARES Act may still qualify as a modification that does not need to be accounted for as a TDR. The agencies confirmed with FASB staff that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief are not TDRs. This includes short-term modifications such as payment deferrals, fee waivers, extensions of repayment terms, or insignificant delays in payment. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. • Past Due Reporting - With regard to loans not otherwise reportable as past due, financial institutions are not expected to designate loans with deferrals granted due to COVID-19 as past due because of the deferral. A loan’s payment date is governed by the due date stipulated in the legal agreement. If a financial institution agrees to a payment deferral, these loans would not be considered past due during the period of the deferral. • Nonaccrual Status and Charge-offs - During short-term COVID-19 modifications, these loans generally should not be reported as nonaccrual or as classified. The Company began offering short-term loan modifications to assist borrowers during the COVID-19 pandemic . These modifications generally involve principal and/or interest payment deferrals for up to six months. These modifications generally meet the criteria of both Section 4013 of the CARES Act and the joint interagency statement, and therefore, the Company does not account for such loan modifications as TDRs. As the COVID-19 pandemic persists in negatively impacting the economy, the Company continues to offer additional loan modifications to borrowers struggling as a result of COVID-19. Similar to the initial modifications granted, the additional round of loan modifications are granted specifically under Section 4013 of the CARES Act and generally involve 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 . On August 3, 2020 , the Federal Financial Institutions Examination Council on behalf of its members (collectively “the FFIEC members”) issued a joint statement on additional loan accommodations related to COVID-19. The joint statement clarifies that for loan modifications in which Section 4013 is being applied, subsequent modifications could also be eligible under Section 4013. To be eligible, each loan modification must be (1) related to the COVID -19 event; (2) executed on a loan that was not more than 30 days past due as of December 31, 2019; and (3) executed between March 1, 2020, and the earlier of (A) 60 days after the date of termination of the National Emergency or (B) December 31, 2020. The December 31, 2020 deadline was subsequently extended to January 1, 2022 , by the CAA . Substantially all of the Company’s additional round of loan modifications granted under Section 4013 of the CARES Act are in compliance with the aforementioned FFIEC requirements . Accordingly, the Company does not account for such loan modifications as TDRs. In April 2020, the FASB staff issued a Q&A document on accounting for lease concessions related to the effects of the COVID-19 pandemic. The FASB staff noted that entities may elect to not evaluate whether certain concessions provided by lessors to mitigate the effects of COVID-19 on lessees are lease modifications. This option is intended to reduce the operational challenges of individually assessing every COVID-19 related lease concession to determine whether it results in having to apply Topic 842 lease modification guidance. This election is available only for concessions related to the effects of the COVID-19 pandemic that do not result in a substantial increase in either the rights of the lessor or the obligations of the lessee. For entities that choose this election, they may account for the concession as if no changes to the lease contract were made. Under that accounting, a lessor would continue to recognize income. The Company has elected to apply the relief provided by the FASB not to evaluate individual contracts. The Company also elected not to apply the lease modification framework for concessions granted. The Company, as lessor, granted lease concessions on some of its sales-type finance leases for equipment and automobiles. Equipment lease concessions primarily consist of interest-only payments for a six-month period. Regular lease payments resume after the six-month period and the maturity date is extended by six months. Automobile lease concessions primarily consist of six-month extension programs whereby lease payments currently due are deferred and shifted to the end of the lease term. Interest income continues to accrue during the deferral period. As of March 31, 2021, the Company has not offered a material amount of concessions. The Company, as lessor, leases and subleases real property to lessee tenants under operating leases. As of March 31, 2021, no material lease concessions have been granted to lessees. The Company, as lessee, also leases real estate property for branch locations, ATM locations, and office space. As of , the Company has not requested any lease concessions. Accounting Standards Adopted in 2021 In December 2019, the FASB issued ASU No. 2019-12, “Simplifying the Accounting for Income Taxes.” In January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope.”

Cash and Cash Equivalents

Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2021
Cash And Cash Equivalents [Abstract]
Cash and Cash Equivalents	Note 2. Cash and Cash Equivalents 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) March 31, 2021 December 31, 2020 Interest-Bearing Deposits in Other Banks $ 4,506 $ 1,646 Funds Sold 1,101,631 333,022 Cash and Due From Banks 286,717 279,420 Total Cash and Cash Equivalents $ 1,392,854 $ 614,088

Investment Securities

Investment Securities	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020, were as follows: (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2021 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 165,355 $ 408 $ (541 ) $ 165,222 Debt Securities Issued by States and Political Subdivisions 23,544 785 (4 ) 24,325 Debt Securities Issued by U.S. Government-Sponsored Enterprises 985 51 (1 ) 1,035 Debt Securities Issued by Corporations 219,493 3,589 (967 ) 222,115 Mortgage-Backed Securities: Residential - Government Agencies 1,564,690 28,489 (7,834 ) 1,585,345 Residential - U.S. Government-Sponsored Enterprises 1,835,401 13,646 (41,118 ) 1,807,929 Commercial - Government Agencies 213,467 6,007 (682 ) 218,792 Total Mortgage-Backed Securities 3,613,558 48,142 (49,634 ) 3,612,066 Total $ 4,022,935 $ 52,975 $ (51,147 ) $ 4,024,763 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 7,499 $ — $ (166 ) $ 7,333 Debt Securities Issued by States and Political Subdivisions 33,596 533 — 34,129 Debt Securities Issued by Corporations 11,287 209 — 11,496 Mortgage-Backed Securities: Residential - Government Agencies 1,209,218 26,398 (13,732 ) 1,221,884 Residential - U.S. Government-Sponsored Enterprises 1,962,265 28,181 (25,499 ) 1,964,947 Commercial - Government Agencies 240,495 1,613 (4,551 ) 237,557 Total Mortgage-Backed Securities 3,411,978 56,192 (43,782 ) 3,424,388 Total $ 3,464,360 $ 56,934 $ (43,948 ) $ 3,477,346 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 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 $6.7 million and $6.6 million as of March 31, 2021, and December 31, 2020, respectively. For held-to-maturity (“HTM”) debt securities, AIR totaled $7.1 million and $6.8 million as of March 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 March 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 $ 52,007 $ 51,965 Due After One Year Through Five Years 71,863 74,454 Due After Five Years Through Ten Years 121,056 121,972 244,926 248,391 Debt Securities Issued by Government Agencies 164,451 164,306 Mortgage-Backed Securities: Residential - Government Agencies 1,564,690 1,585,345 Residential - U.S. Government-Sponsored Enterprises 1,835,401 1,807,929 Commercial - Government Agencies 213,467 218,792 Total Mortgage-Backed Securities 3,613,558 3,612,066 Total $ 4,022,935 $ 4,024,763 Held-to-Maturity: Due in One Year or Less 33,595 34,128 Due After One Year Through Five Years 18,787 18,830 52,382 52,958 Mortgage-Backed Securities: Residential - Government Agencies 1,209,218 1,221,884 Residential - U.S. Government-Sponsored Enterprises 1,962,265 1,964,947 Commercial - Government Agencies 240,495 237,557 Total Mortgage-Backed Securities 3,411,978 3,424,388 Total $ 3,464,360 $ 3,477,346 Investment securities with carrying values of $3.6 billion as of March 31, 2021, and December 31, 2020, respectively, were pledged to secure deposits of governmental entities, securities sold under agreements to repurchase, and FRB discount window borrowing. The table below presents the gains and losses from the sales of investment securities for the three months ended March 31, 2021, and March 31, 2020: Three Months Ended March 31, (dollars in thousands) 2021 2020 Gross Gains on Sales of Investment Securities $ — $ 77 Gross Losses on Sales of Investment Securities (1,203 ) (1,047 ) Net Gains (Losses) on Sales of Investment Securities $ (1,203 ) $ (970 ) The losses on sales of investment securities during the three months ended March 31, 2021, and March 31, 2020, 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 March 31, 2021 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 2,833 $ (10 ) $ 96,248 $ (531 ) $ 99,081 $ (541 ) Debt Securities Issued by States and Political Subdivisions 482 (3 ) 25 (1 ) 507 (4 ) Debt Securities Issued by U.S. Government- Sponsored Enterprises 49 (1 ) — — 49 (1 ) Debt Securities Issued by Corporations 39,224 (776 ) 74,809 (191 ) 114,033 (967 ) Mortgage-Backed Securities: Residential - Government Agencies 354,059 (7,613 ) 8,515 (221 ) 362,574 (7,834 ) Residential - U.S. Government-Sponsored Enterprises 1,229,286 (41,118 ) — — 1,229,286 (41,118 ) Commercial-Government Agencies 24,246 (682 ) — — 24,246 (682 ) Total Mortgage-Backed Securities 1,607,591 (49,413 ) 8,515 (221 ) 1,616,106 (49,634 ) Total $ 1,650,179 $ (50,203 ) $ 179,597 $ (944 ) $ 1,829,776 $ (51,147 ) December 31, 2020 Available-for-Sale: 1 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 Company does not believe that the AFS debt securities that were in an unrealized loss position as of March 31, 2021, which were comprised of 155 individual securities, represent a credit loss impairment. The gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased. As of March 31, 2021, and December 31, 2020, the gross unrealized losses reported for mortgage-backed securities were mostly related to investment securities issued by the Ginnie Mae, Fannie Mae, and Freddie Mac. The Company does 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 March 31, 2021. The Company also carries a limited portfolio of HTM municipal bonds. As of March 31, 2021, the entire portfolio consisted of State of Hawaii bonds carrying a Moody’s rating of Aa2, with a portion of these bonds escrowed to maturity. Utilizing the CECL approach, the Company determined that the expected credit loss on its municipal bond portfolio was de minimis, and therefore, an allowance for credit losses was not recorded as of March 31, 2021. Interest income from taxable and non-taxable investment securities for the three months ended March 31, 2021, and March 31, 2020, were as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Taxable $ 28,856 $ 35,393 Non-Taxable 281 570 Total Interest Income from Investment Securities $ 29,137 $ 35,963 As of March 31, 2021, and December 31, 2020, the carrying value of the Company’s Federal Home Loan Bank of Des Moines stock and Federal Reserve Bank stock was as follows: (dollars in thousands) March 31, 2021 December 31, 2020 Federal Home Loan Bank Stock $ 12,000 $ 12,000 Federal Reserve Bank Stock 21,401 21,340 Total $ 33,401 $ 33,340 These securities can only be redeemed or sold at their par value and only to the respective issuing 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 will be 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 be insufficient 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. As of March 31, 2021, the conversion ratio was 1.6228. See Note 12 Derivative Financial Instruments 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 Allowa

Loans and Leases and the Allowance for Credit Losses	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020: (dollars in thousands) March 31, 2021 December 31, 2020 Commercial Commercial and Industrial $ 2,013,981 $ 1,875,293 Commercial Mortgage 2,859,246 2,854,829 Construction 281,164 259,798 Lease Financing 104,980 110,766 Total Commercial 5,259,371 5,100,686 Consumer Residential Mortgage 4,216,976 4,130,513 Home Equity 1,577,500 1,604,538 Automobile 710,407 708,800 Other 1 376,449 395,483 Total Consumer 6,881,332 6,839,334 Total Loans and Leases $ 12,140,703 $ 11,940,020 1 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 $2.1 million and $3.2 million for the three months ended March 31, 2021, and March 31, 2020, respectively. The Company elected to exclude AIR from the amortized cost basis of loans disclosed throughout this footnote. As of March 31, 2021, and December 31, 2020, AIR for loans totaled $34.1 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 Allowance for Credit Losses (the “Allowance”) The following presents by portfolio segment, the activity in the Allowance for the three months ended March 31, 2021, and March 31, 2020. (dollars in thousands) Commercial Consumer Total Three Months Ended March 31, 2021 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2020) $ 84,847 $ 131,405 $ 216,252 Loans and Leases Charged-Off (248 ) (6,043 ) (6,291 ) Recoveries on Loans and Leases Previously Charged-Off 112 3,263 3,375 Net Loans and Leases Recovered (Charged-Off) (136 ) (2,780 ) (2,916 ) Provision for Credit Losses (1,900 ) (13,093 ) (14,993 ) Balance at End of Period $ 82,811 $ 115,532 $ 198,343 Three Months Ended March 31, 2020 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2020) $ 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 (693 ) (6,484 ) (7,177 ) Recoveries on Loans and Leases Previously Charged-Off 329 3,108 3,437 Net Loans and Leases Recovered (Charged-Off) (364 ) (3,376 ) (3,740 ) Provision for Credit Losses 13,339 20,261 33,600 Balance at End of Period $ 67,987 $ 70,163 $ 138,150 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. Management believes that there is a low likelihood of loss related to those loans and leases that are considered Pass. 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. Management believes that there is a moderate likelihood of some loss related to those loans and leases that are considered Special Mention. 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 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 the first mortgage is with the Company and the current combined loan-to-value ratio is 60% or less. 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. Management believes that there is a distinct possibility that the Company will sustain some loss if the deficiencies related to Classified loans and leases are not corrected in a timely manner. For pass rated credits, 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 March 31, 2021 . Term Loans by Origination Year (dollars in thousands) YTD March 31, 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans and Leases March 31, 2021 Commercial Commercial and Industrial Pass $ 338,648 $ 868,969 $ 116,796 $ 116,999 $ 42,553 $ 106,466 $ 295,977 $ 720 $ 1,887,128 Special Mention 88 32,548 2,040 - - 364 27,586 40 62,666 Classified 270 8,477 107 13,656 711 18,864 22,011 91 64,187 Total Commercial and Industrial $ 339,006 $ 909,994 $ 118,943 $ 130,655 $ 43,264 $ 125,694 $ 345,574 $ 851 $ 2,013,981 Commercial Mortgage Pass $ 150,533 $ 830,847 $ 409,973 $ 340,907 $ 224,916 $ 651,705 $ 73,919 $ - $ 2,682,800 Special Mention 2,101 87,109 28,340 3,073 7,100 18,364 - - 146,087 Classified 858 15,883 651 - 272 12,695 - - 30,359 Total Commercial Mortgage $ 153,492 $ 933,839 $ 438,964 $ 343,980 $ 232,288 $ 682,764 $ 73,919 $ - $ 2,859,246 Construction Pass $ 44,556 $ 106,654 $ 89,590 $ 11,272 $ 894 $ - $ 28,198 $ - $ 281,164 Total Construction $ 44,556 $ 106,654 $ 89,590 $ 11,272 $ 894 $ - $ 28,198 $ - $ 281,164 Lease Financing Pass $ 4,324 $ 19,212 $ 19,450 $ 12,764 $ 3,441 $ 44,528 $ - $ - $ 103,719 Special Mention - 31 47 92 36 78 - - 284 Classified - - 16 961 - - - - 977 Total Lease Financing $ 4,324 $ 19,243 $ 19,513 $ 13,817 $ 3,477 $ 44,606 $ - $ - $ 104,980 Total Commercial $ 541,378 $ 1,969,730 $ 667,010 $ 499,724 $ 279,923 $ 853,064 $ 447,691 $ 851 $ 5,259,371 Consumer Residential Mortgage Pass $ 461,424 $ 1,258,849 $ 507,084 $ 259,764 $ 401,540 $ 1,325,854 $ - $ - $ 4,214,515 Classified - - 294 403 913 851 - - 2,461 Total Residential Mortgage $ 461,424 $ 1,258,849 $ 507,378 $ 260,167 $ 402,453 $ 1,326,705 $ - $ - $ 4,216,976 Home Equity Pass $ - $ - $ - $ - $ - $ 4,233 $ 1,531,403 $ 35,016 $ 1,570,652 Classified - - - - - 74 5,640 1,134 6,848 Total Home Equity $ - $ - $ - $ - $ - $ 4,307 $ 1,537,043 $ 36,150 $ 1,577,500 Automobile Pass $ 78,416 $ 198,814 $ 194,351 $ 140,735 $ 58,966 $ 38,521 $ - $ - $ 709,803 Classified - 142 128 112 122 100 - - 604 Total Automobile $ 78,416 $ 198,956 $ 194,479 $ 140,847 $ 59,088 $ 38,621 $ - $ - $ 710,407 Other 1 Pass $ 23,146 $ 65,620 $ 132,730 $ 81,022 $ 32,567 $ 9,534 $ 29,581 $ 1,421 $ 375,621 Classified - 149 294 218 72 30 60 5 828 Total Other $ 23,146 $ 65,769 $ 133,024 $ 81,240 $ 32,639 $ 9,564 $ 29,641 $ 1,426 $ 376,449 Total Consumer $ 562,986 $ 1,523,574 $ 834,881 $ 482,254 $ 494,180 $ 1,379,197 $ 1,566,684 $ 37,576 $ 6,881,332 Total Loans and Leases $ 1,104,364 $ 3,493,304 $ 1,501,891 $ 981,978 $ 774,103 $ 2,232,261 $ 2,014,375 $ 38,427 $ 12,140,703 1 Comprised of other revolving credit, installment, and lease financing. For the three months ended March 31, 2021, and March 31, 2020, $0.9 million and $0.6 million revolving loans, respectively, 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 Commercial Commercial and Industrial Pass $ 944,463 $ 149,024 $ 149,468 $ 49,385 $ 52,354 $ 68,269 $ 342,339 $ 847 $ 1,756,149 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 $ 988,373 $ 150,800 $ 151,734 $ 50,162 $ 52,483 $ 87,530 $ 393,187 $ 1,024 $ 1,875,293 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 Other 1 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 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 March 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 March 31, 2021 Commercial Commercial and Industrial $ 3,398 $ 70 $ 9 $ 293 $ 3,770 $ 2,010,211 $ 2,013,981 $ 257 Commercial Mortgage — — — 8,503 8,503 2,850,743 2,859,246 4,959 Construction — — — — — 281,164 281,164 — Lease Financing — — — — — 104,980 104,980 — Total Commercial 3,398 70 9 8,796 12,273 5,247,098 5,259,371 5,216 Consumer Residential Mortgage 3,510 3,111 4,069 1,804 12,494 4,204,482 4,216,976 404 Home Equity 4,568 2,328 4,906 4,951 16,753 1,560,747 1,577,500 882 Automobile 5,422 1,157 604 — 7,183 703,224 710,407 — Other 1 4,650 1,237 828 — 6,715 369,734 376,449 — Total Consumer 18,150 7,833 10,407 6,755 43,145 6,838,187 6,881,332 1,286 Total $ 21,548 $ 7,903 $ 10,416 $ 15,551 $ 55,418 $ 12,085,285 $ 12,140,703 $ 6,502 As of December 31, 2020 Commercial Commercial and Industrial $ 191 $ 59 $ — $ 441 $ 691 $ 1,874,602 $ 1,875,293 $ 285 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 is still not expected. Non-Accrual Loans and Leases The following presents the non-accrual loans and leases as of March 31, 2021, and December 31, 2020. March 31, 2021 December 31, 2020 (dollars in thousands) Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Commercial Commercial and Industrial $ 293 $ — $ 293 $ 441 $ — $ 441 Commercial Mortgage 8,503 — 8,503 8,527 — 8,527 Total Commercial 8,796 — 8,796 8,968 — 8,968 Consumer Residential Mortgage 1,679 125 1,804 3,096 127 3,223 Home Equity 4,951 — 4,951 3,958 — 3,958 Total Consumer 6,630 125 6,755 7,054 127 7,181 Total $ 15,426 $ 125 $ 15,551 $ 16,022 $ 127 $ 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 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 $84.1 million as of March 31, 2021, and $72.5 million as of December 31, 2020. There were $0.3 million and $0.5 million commitments to lend additional funds on loans modified in a TDR as of March 31, 2021, and December 31, 2020, respectively. The Company offers various types of concessions when modifying a loan or lease. Commercial and industrial loans modified in a TDR often involve temporary interest-only payments, term extensions, and converting revolving credit lines to term loans. Additional collateral, a co-borrower, or a guarantor is often requested. Commercial mortgage and construction loans modified in a TDR often involve reducing the interest rate for the remaining term of the loan, extending the maturity date at an interest rate lower than the current market rate for new debt with similar risk, or substituting or adding a co-borrower or guarantor. Construction loans modified in a TDR may also involve extending the interest-only payment period. Residential mortgage loans modified in a TDR generally include fully amortizing the loan for up to 40 years from the modification effective date. In some cases, the Company may forbear a portion of the unpaid principal balance with a balloon payment due upon maturity or pay-off of the loan. Land loans are also included in the class of residential mortgage loans. Land loans are typically structured as interest-only monthly payments with a balloon payment due at maturity. Land loan modifications usually involve extending the interest-only monthly payments up to an additional five years with a balloon payment due at maturity, or re-amortizing the remaining balance over a period up to 360 months. Interest rates are not changed for land loan modifications. Home equity modifications are made infrequently and are uniquely designed to meet the specific needs of each borrower. Automobile loans modified in a TDR are primarily comprised of loans where the Company has lowered monthly payments by extending the term. Loans modified in a TDR are typically already 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 increasing the specific Allowance associated with the loan. 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 three months ended March 31, 2021, and March 31, 2020. Loans Modified as a TDR for the Three Months Ended March 31, 2021 Loans Modified as a TDR for the Three Months Ended March 31, 2020 Recorded Increase in Recorded Increase in Troubled Debt Restructurings Investment Allowance Investment Allowance (dollars in thousands) Number of Contracts (as of period end) 1 (as of period end) Number of Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 5 $ 112 $ 1 2 $ 99 $ 2 Total Commercial 5 112 1 2 99 2 Consumer Home Equity 1 52 4 — — — Automobile 394 8,287 115 52 893 14 Other 2 214 1,965 79 31 240 10 Total Consumer 609 10,304 198 83 1,133 24 Total 614 $ 10,416 $ 199 85 $ 1,232 $ 26 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. The following presents by class, all loans modified in a TDR that defaulted during the three months ended March 31, 2021, and March 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. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Consumer Automobile 18 $ 281 18 $ 176 Other 2 4 27 5 50 Total Consumer 22 308 23 226 Total 22 $ 308 23 $ 226 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. Commercial and consumer 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 in response to COVID-19 The Company initially offered short-term loan modifications to assist borrowers during the COVID-19 national emergency. These modifications generally involve principal and/or interest payment deferrals for up to six months. As the COVID-19 pandemic persists in negatively impacting the economy, the Company continues to offer additional loan modifications to borrowers struggling as a result of COVID-19. Similar to the initial modifications granted, the additional round of loan modifications generally involve 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 continues to accrue and recognize interest income during the deferral 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 do not involve forgiveness or interest rate reductions. See Note 1 Summary of Significant Accounting Policies 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 consists of six-month extension programs whereby lease payments currently due are deferred and shifted to the end of the lease term. Interest income continues to accrue , and in certain cases paid during the deferral period. Additional round s of lease concessions were not material. See Note 1 Summary of Significant Accounting Policies for more information. These COVID-19 related loan and lease modifications totaled $271.0 million (118 loans and leases) for the commercial segment and $51.1 million (419 loans and leases) for the consumer segment and $311.6 million (210 loans and leases) for the commercial segment and $178.1 million (1,920 loans and leases) for the consumer segment as of March 31, 2021, and December 31, 2020, respectively. Foreclosure Proceedings Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure totaled $1.5 million as of March 31, 2021.

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 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 $2.8 billion as of March 31, 2021, and December 31, 2020, respectively. 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 14 Fair Value of Assets and Liabilities 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 $1.6 million and $1.9 million for the three months ended March 31, 2021, and March 31, 2020, respectively. 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 three months ended March 31, 2021, and March 31, 2020, the change in the carrying value of the Company’s mortgage servicing rights accounted for under the fair value measurement method was as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Balance at Beginning of Period $ 958 $ 1,126 Change in Fair Value: Due to Payoffs (39 ) (25 ) Total Changes in Fair Value of Mortgage Servicing Rights (39 ) (25 ) Balance at End of Period $ 919 $ 1,101 For the three months ended March 31, 2021, and March 31, 2020, the change in the carrying value of the Company’s mortgage servicing rights accounted for under the amortization method was as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Balance at Beginning of Period $ 18,694 $ 23,896 Servicing Rights that Resulted From Asset Transfers 1,680 1,165 Amortization (1,163 ) (1,112 ) Valuation Allowance Recovery (Provision) 2,190 (2,513 ) Balance at End of Period $ 21,401 $ 21,436 Valuation Allowance: Balance at Beginning of Period $ (3,892 ) $ — Valuation Allowance Recovery (Provision) 2,190 (2,513 ) Balance at End of Period $ (1,702 ) $ (2,513 ) Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 18,694 $ 25,714 End of Period $ 21,401 $ 21,436 The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of March 31, 2021, and December 31, 2020, were as follows: March 31, 2021 December 31, 2020 Weighted-Average Constant Prepayment Rate 1 11.27 % 14.42 % Weighted-Average Life (in years) 6.03 4.99 Weighted-Average Note Rate 3.79 % 3.87 % Weighted-Average Discount Rate 2 6.88 % 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 March 31, 2021, and December 31, 2020, is presented in the following table. (dollars in thousands) March 31, 2021 December 31, 2020 Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (251 ) $ (203 ) Decrease in fair value from 50 bps adverse change (498 ) (401 ) Discount Rate Decrease in fair value from 25 bps adverse change (226 ) (184 ) Decrease in fair value from 50 bps adverse change (447 ) (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.

Affordable Housing Projects Tax

Affordable Housing Projects Tax Credit Partnerships	3 Months Ended
	Mar. 31, 2021
Equity Method Investments And Joint Ventures [Abstract]
Affordable Housing Projects Tax Credit Partnerships	Note 6. 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 member(s) 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 $134.8 million and $138.9 million as of March 31, 2021, and December 31, 2020, respectively, and are included in other assets in the consolidated statements of condition. Unfunded Commitments As of March 31, 2021, the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2021 $ 15,122 2022 6,757 2023 19,025 2024 173 2025 56 Thereafter 3,424 Total Unfunded Commitments $ 44,557 The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three months ended March 31, 2021, and March 31, 2020. Three Months Ended March 31, (dollars in thousands) 2021 2020 Effective Yield Method Tax credits and other tax benefits recognized $ 2,151 $ 2,938 Amortization Expense in Provision for Income Taxes 1,692 2,147 Proportional Amortization Method Tax credits and other tax benefits recognized $ 2,591 $ 1,523 Amortization Expense in Provision for Income Taxes 2,326 1,318 There were no impairment losses related to LIHTC investments during the three months ended March 31, 2021, and March 31, 2020.

Balance Sheet Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2021
Offsetting [Abstract]
Balance Sheet Offsetting	Note 7. Balance Sheet Offsetting 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 risk of entering into these agreements by entering into equal and offsetting swap agreements with third-party financial institutions. The 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). 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 cash or 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 net liability positions with its financial institution counterparties totaling $11.6 million and $17.2 million as of March 31, 2021, and December 31, 2020, respectively. See Note 12 Derivative Financial Instruments 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, are 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, and therefore, these swap agreements were not included in the offsetting table at the end of this section. See Note 12 Derivative Financial Instruments Securities Sold Under Agreements to Repurchase (“Repurchase Agreements”) 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 March 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 March 31, 2021 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ — $ — $ — $ 490 $ 490 Mortgage-Backed Securities: Residential - Government Agencies — — 77,117 17,352 94,469 Residential - U.S. Government-Sponsored Enterprises — — 497,883 7,648 505,531 Total $ — $ — $ 575,000 $ 25,490 $ 600,490 December 31, 2020 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ 100 $ — $ — $ 490 $ 590 Mortgage-Backed Securities: Residential - Government Agencies — — 83,599 20,210 103,809 Residential - U.S. Government-Sponsored Enterprises — — 491,401 4,790 496,191 Total $ 100 $ — $ 575,000 $ 25,490 $ 600,590 The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of March 31, 2021, and December 31, 2020. The swap agreements the Company has 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/ Received 1 Net Amount March 31, 2021 Liabilities: Interest Rate Swap Agreements: Institutional Counterparties $ 11,627 $ — $ 11,627 $ — $ 7,071 $ 4,556 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 490 — 490 — 490 — $ 600,490 $ — $ 600,490 $ — $ 600,490 $ — 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 — $ 600,590 $ — $ 600,590 $ — $ 600,590 $ — 1 The application of collateral cannot reduce the net amount below zero. Therefore, excess collateral is not reflected in this table. For repurchase agreements with private institutions, the fair value of investment securities pledged was $631.1 million and $635.2 million as of March 31, 2021, and December 31, 2020, respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $2.2 million and $2.5 million as of March 31, 2021, and December 31, 2020, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2021
Comprehensive Income Net Of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 8. Accumulated Other Comprehensive Income (Loss) The following table presents the components of other comprehensive income (loss) for the three months ended March 31, 2021, and March 31, 2020: (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended March 31, 2021 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (68,225 ) $ (18,082 ) $ (50,143 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 125 32 93 Net Unrealized Gains (Losses) on Investment Securities (68,100 ) (18,050 ) (50,050 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 662 177 485 Amortization of Prior Service Credit (61 ) (17 ) (44 ) Defined Benefit Plans, Net 601 160 441 Other Comprehensive Income (Loss) $ (67,499 ) $ (17,890 ) $ (49,609 ) Three Months Ended March 31, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 56,556 $ 14,989 $ 41,567 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (77 ) (21 ) (56 ) Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 65 17 48 Net Unrealized Gains (Losses) on Investment Securities 56,544 14,985 41,559 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 570 152 418 Amortization of Prior Service Credit (61 ) (17 ) (44 ) Defined Benefit Plans, Net 509 135 374 Other Comprehensive Income (Loss) $ 57,053 $ 15,120 $ 41,933 1 The amount relates to the amortization/accretion of unrealized net 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, for the three months ended March 31, 2021, and March 31, 2020: (dollars in thousands) Investment Securities- Available- for-Sale Investment Securities- Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, 2021 Balance at Beginning of Period $ 51,495 $ (423 ) $ (43,250 ) $ 7,822 Other Comprehensive Income (Loss) Before Reclassifications (50,143 ) — — (50,143 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 93 441 534 Total Other Comprehensive Income (Loss) (50,143 ) 93 441 (49,609 ) Balance at End of Period $ 1,352 $ (330 ) $ (42,809 ) $ (41,787 ) Three Months Ended March 31, 2020 Balance at Beginning of Period $ 8,359 $ (715 ) $ (38,756 ) $ (31,112 ) Other Comprehensive Income (Loss) Before Reclassifications 41,567 — — 41,567 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (56 ) 48 374 366 Total Other Comprehensive Income (Loss) 41,511 48 374 41,933 Balance at End of Period $ 49,870 $ (667 ) $ (38,382 ) $ 10,821 The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three months ended March 31, 2021, and March 31, 2020: 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 Three Months Ended March 31, (dollars in thousands) 2021 2020 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (125 ) $ (65 ) Interest Income 32 17 Provision for Income Tax (93 ) (48 ) Net of Tax Sale of Investment Securities Available-for-Sale — 77 Investment Securities Gains (Losses), Net — (21 ) Provision for Income Tax — 56 Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 61 61 Net Actuarial Losses 2 (662 ) (570 ) (601 ) (509 ) Total Before Tax 160 135 Provision for Income Tax (441 ) (374 ) Net of Tax Total Reclassifications for the Period $ (534 ) $ (366 ) Net of Tax 1 2 Pension Plans and Postretirement Benefit Plan

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Note 9. Earnings Per Share There were no adjustments to net income, the numerator, for purposes of computing earnings per share. The following is a reconciliation of the weighted average number of common shares outstanding for computing diluted earnings per share and antidilutive stock options and restricted stock outstanding for the three months ended March 31, 2021, and March 31, 2020: Three Months Ended March 31, 2021 2020 Denominator for Basic Earnings Per Share 39,827,590 39,681,611 Dilutive Effect of Equity Based Awards 243,887 235,375 Denominator for Diluted Earnings Per Share 40,071,477 39,916,986 Antidilutive Stock Options and Restricted Stock Outstanding 267,741 106,602

Business Segments

Business Segments	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Business Segments	Note 10. 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 we use 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 63 branch locations and 361 ATMs throughout Hawaii and the Pacific Islands, e-Bankoh (on-line banking service), a 24-hour 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 three months ended March 31, 2021, and March 31, 2020, were as follows: (dollars in thousands) Consumer Banking Commercial Banking Treasury and Other Consolidated Total Three Months Ended March 31, 2021 Net Interest Income $ 69,762 $ 47,143 $ 3,664 $ 120,569 Provision for Credit Losses 2,866 50 (17,216 ) (14,300 ) Net Interest Income After Provision for Credit Losses 66,896 47,093 20,880 134,869 Noninterest Income 33,698 7,858 1,414 42,970 Noninterest Expense (78,181 ) (15,677 ) (5,007 ) (98,865 ) Income Before Provision for Income Taxes 22,413 39,274 17,287 78,974 Provision for Income Taxes (5,474 ) (9,558 ) (3,993 ) (19,025 ) Net Income $ 16,939 $ 29,716 $ 13,294 $ 59,949 Total Assets as of March 31, 2021 $ 7,556,756 $ 5,224,386 $ 9,166,129 $ 21,947,271 Three Months Ended March 31, 2020 1 Net Interest Income $ 73,914 $ 45,237 $ 6,815 $ 125,966 Provision for Credit Losses 3,451 290 29,859 33,600 Net Interest Income After Provision for Credit Losses 70,463 44,947 (23,044 ) 92,366 Noninterest Income 32,590 11,735 1,824 46,149 Noninterest Expense (70,746 ) (17,346 ) (8,220 ) (96,312 ) Income Before Provision for Income Taxes 32,307 39,336 (29,440 ) 42,203 Provision for Income Taxes (8,116 ) (9,555 ) 10,210 (7,461 ) Net Income $ 24,191 $ 29,781 $ (19,230 ) $ 34,742 Total Assets as of March 31, 2020 1 $ 7,388,217 $ 4,728,651 $ 6,425,365 $ 18,542,233 1

Pension Plans and Postretiremen

Pension Plans and Postretirement Benefit Plan	3 Months Ended
	Mar. 31, 2021
Compensation And Retirement Disclosure [Abstract]
Pension Plans and Postretirement Benefit Plan	Note 11. Pension Plans and Postretirement Benefit Plan 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 three months ended March 31, 2021, and March 31, 2020. Pension Benefits Postretirement Benefits (dollars in thousands) 2021 2020 2021 2020 Three Months Ended March 31, Service Cost $ — $ — $ 176 $ 151 Interest Cost 727 900 206 231 Expected Return on Plan Assets (1,148 ) (1,258 ) — — Amortization of: Prior Service Credit — — (61 ) (61 ) Net Actuarial Losses 662 570 — — Net Periodic Benefit Cost $ 241 $ 212 $ 321 $ 321 The service cost component of net periodic benefit cost is included in salaries and benefits and all other components of net periodic benefit cost are included in other noninterest expense in the consolidated statements of income for the Company’s pension plans and postretirement benefit plan. For the three months ended March 31, 2021, the Company contributed $0.1 million to the pension plans and $0.3 million to the postretirement benefit plan. The Company expects to contribute a total of $0.4 million to the pension plans and $1.2 million to the postretirement benefit plan for the year ending December 31, 2021.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 12. Derivative Financial Instruments The notional amount and fair value of the Company’s derivative financial instruments as of March 31, 2021, and December 31, 2020, were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 100,322 $ 2,704 $ 102,881 $ 4,947 Forward Commitments 102,778 748 158,759 (740 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 1,370,386 24,416 1,362,778 90,130 Pay Fixed/Receive Variable Swaps 1,370,386 (11,627 ) 1,362,778 (17,197 ) Foreign Exchange Contracts 88,919 2,345 90,587 866 Conversion Rate Swap Agreement 129,020 — 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 March 31, 2021, and December 31, 2020: Derivative Financial Instruments March 31, 2021 December 31, 2020 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 2,704 $ — $ 4,947 $ — Forward Commitments 794 46 — 740 Interest Rate Swap Agreements 42,339 29,561 90,342 17,409 Foreign Exchange Contracts 1,140 2,395 878 12 Total $ 46,977 $ 32,002 $ 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 three months ended March 31, 2021, and March 31, 2020: Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Not Designated as Hedging Instruments Recognized in the March 31, (dollars in thousands) Statements of Income 2021 2020 Interest Rate Lock Commitments Mortgage Banking $ 773 $ 6,303 Forward Commitments Mortgage Banking 3,227 (2,184 ) Interest Rate Swap Agreements Other Noninterest Income 1,604 6,438 Foreign Exchange Contracts Other Noninterest Income 271 714 Total $ 5,875 $ 11,271 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 March 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. 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. The Company enters into interest rate 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 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. 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. Collateral, usually in the form of cash or marketable securities, is posted by the counterparty with net liability positions in accordance with contract thresholds. See Note 7 Balance Sheet Offsetting The Company’s interest rate swap agreements with financial institution counterparties may contain credit-risk-related contingent features tied to a specified credit rating of the Company. Under these provisions, should the Company’s specified rating fall below a particular level (e.g., investment grade), or if the Company no longer obtains the specified rating, the counterparty may require the Company to pledge collateral on an immediate and ongoing basis (subject to the requirement that such swaps are in a net liability position beyond the level specified in the contract), or require immediate settlement of the swap agreement. Other credit-risk-related contingent features may also allow the counterparty to require immediate settlement of the swap agreement if the Company fails to maintain a specified minimum level of capitalization. With regard to derivative contracts not centrally cleared through a clearinghouse, regulations require collateral to be posted by the party with a net liability position (i.e., the threshold for posting collateral was reduced to zero, subject to certain minimum transfer amounts). The requirements generally applied to new derivative contracts entered into by the Company after March 1, 2017, although certain counterparties may elect to apply lower thresholds to existing contracts. Parties to a centrally cleared over-the-counter derivative exchange daily payments that reflect the daily change in value of the derivative. These payments are commonly referred to as variation margin. Historically, variation margin payments have typically been treated as collateral against the derivative position. Effective 2017, the Chicago Mercantile Exchange and LCH.Clearnet Limited (collectively, the “clearinghouses”) amended their rulebooks to legally characterize variation margin payments for over-the-counter derivatives they clear as settlements of the derivatives’ mark-to-market exposure rather than collateral against the exposures. This rule change effectively causes any derivative cleared through one of the clearinghouses to have a fair value that approximates zero on a daily basis. The majority of the Company’s swap agreements executed with third-party financial institutions are now required to be cleared through one of the clearinghouses. 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. 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. 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 ratio of Class B into Class A unrestricted common shares. In the event of Visa increasing the conversion ratio, the buyer would be required to make payment to the Company. As of March 31, 2021, and December 31, 2020, the conversion rate swap agreement was valued at zero (i.e., no contingent liability recorded) as further reductions to the conversion ratio were deemed neither probable nor reasonably estimable by management. See Note 3 Investment Securities

Commitments, Contingencies, and

Commitments, Contingencies, and Guarantees	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Guarantees	Note 13. Commitments, Contingencies, and Guarantees The Company’s credit commitments as of March 31, 2021, and December 31, 2020, were as follows: (dollars in thousands) March 31, 2021 December 31, 2020 Unfunded Commitments to Extend Credit $ 2,837,258 $ 2,787,123 Standby Letters of Credit 102,531 100,186 Commercial Letters of Credit 11,321 10,511 Total Credit Commitments $ 2,951,110 $ 2,897,820 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. 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. As of December 31, 2020, the Company had reserved $8.0 million relating to this claim. 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 using 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. Risks Related to Representation and Warranty Provisions The Company sells residential mortgage loans in the secondary market primarily to the Federal National Mortgage Association (“Fannie Mae”). The Company also pools Federal Housing Administration (“FHA”) insured and U.S. Department of Veterans Affairs (“VA”) guaranteed residential mortgage loans for sale to the Government National Mortgage Corporation (“Ginnie Mae”). These pools of FHA-insured and VA-guaranteed residential mortgage loans are securitized by Ginnie Mae. The agreements under which the Company sells residential mortgage loans to Fannie Mae or Ginnie Mae and the insurance or guaranty agreements with FHA and VA contain provisions that include various representations and warranties regarding the origination and characteristics of the residential mortgage loans. Although the specific representations and warranties vary among investors, insurance or guarantee agreements, they typically cover ownership of the loan, validity of the lien securing the loan, the absence of delinquent taxes or liens against the property securing the loan, compliance with loan criteria set forth in the applicable agreement, compliance with applicable federal, state, and local laws, and other matters. As of March 31, 2021, the unpaid principal balance of residential mortgage loans sold by the Company was $2.4 billion. The agreements under which the Company sells residential mortgage loans require delivery of various documents to the investor or its document custodian. Although these loans are primarily sold on a non-recourse basis, the Company may be obligated to repurchase residential mortgage loans or reimburse investors for losses incurred if a loan review reveals that underwriting and documentation standards were potentially not met. Some agreements may require the Company to repurchase delinquent loans. Upon receipt of a repurchase request, the Company works with investors or insurers to arrive at a mutually agreeable resolution. Repurchase demands are typically reviewed on an individual loan-by-loan basis to validate the claims made by the investor or insurer and to determine if a contractually required repurchase event has occurred. The Company manages the risk associated with potential repurchases or other forms of settlement through its underwriting and quality assurance practices and by servicing mortgage loans to meet investor and secondary market standards. During the three months ended March 31, 2021, there were $0.6 million in residential mortgage loans repurchased as a result of the representation and warranty provisions contained in the applicable contract. As of March 31, 2021, there was no pending repurchase requests related to representation and warranty provisions. Risks Relating to Residential Mortgage Loan Servicing Activities In addition to servicing loans in the Company’s portfolio, substantially all of the loans the Company sells to investors are sold with servicing rights retained. The Company also services loans originated by other mortgage loan originators. As servicer, the Company’s primary duties are to: (1) collect payments due from borrowers; (2) advance certain delinquent payments of principal and interest; (3) maintain and administer any hazard, title, or primary mortgage insurance policies relating to the mortgage loans; (4) maintain any required escrow accounts for payment of taxes and insurance and administer escrow payments; and (5) foreclose on defaulted mortgage loans or, to the extent consistent with the documents governing a securitization, consider alternatives to foreclosure, such as loan modifications or short sales. Each agreement under which the Company acts as servicer generally specifies a standard of responsibility for actions taken by the Company in such capacity and provides protection against expenses and liabilities incurred by the Company when acting in compliance with the respective servicing agreements. However, if the Company commits a material breach of obligations as servicer, the Company may be subject to termination if the breach is not cured within a specified period following notice. The standards governing servicing and the possible remedies for violations of such standards vary by investor. These standards and remedies are determined by servicing guides issued by the investors as well as the contract provisions established between the investors and the Company. Remedies could include repurchase of an affected loan. For the three months ended March 31, 2021, there were no loans repurchased related to loan servicing activities. As of March 31, 2021, there were no pending repurchase requests related to loan servicing activities. Although to date repurchase requests related to representation and warranty provisions and servicing activities have been limited, it is possible that requests to repurchase mortgage loans may increase in frequency as investors more aggressively pursue all means of recovering losses on their purchased loans. However, as of March 31, 2021, management believes that this exposure is not material due to the historical level of repurchase requests and loss trends and thus has not established a liability for losses related to mortgage loan repurchases. As of March 31, 2021, 99% of the Company’s residential mortgage loans serviced for investors were current. The Company maintains ongoing communications with investors and continues to evaluate this exposure by monitoring the level and number of repurchase requests as well as the delinquency rates in the loans sold to investors.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Note 14. Fair Value of Assets and Liabilities Fair Value Hierarchy 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. GAAP established a fair value hierarchy that prioritizes the use of inputs used in valuation methodologies into the following three levels: 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 is 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 require 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. Assets and Liabilities Measured at Fair Value on a Recurring Basis Investment Securities Available-for-Sale Fair values of investment securities available-for-sale were primarily measured using information from a third-party pricing service. This service provides pricing information by utilizing evaluated pricing models supported with market data information. Standard inputs include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data from market research publications. 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. On a quarterly basis, management reviews the pricing information received from the Company’s third-party pricing service. This review process includes a comparison to a second source. The Company’s third-party pricing service has also established processes for us to submit inquiries regarding quoted prices. Periodically, based on these reviews, the Company will challenge the quoted prices provided by the Company’s third-party pricing service. The Company’s third-party pricing service will review the inputs to the evaluation in light of the new market data presented by us. The Company’s third-party pricing service may then affirm the original quoted price or may update the evaluation on a going-forward basis. Generally, we do not adjust the price from the third-party service provider. On a quarterly basis, management also reviews a sample of securities priced by the Company’s third-party pricing service to review the significant assumptions and valuation methodologies used by the service. The information provided is comprised of market reference data, which may include reported trades; bids, offers, or broker-dealer dealer quotes; benchmark yields and spreads; as well as other reference data as appropriate. Based on this review, management determines whether the current placement of the security in the fair value hierarchy is appropriate or whether transfers may be warranted. 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 Mortgage servicing rights do not trade in an active market with readily observable market data. As a result, 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 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. In October 2020, the Company revised its discounted cash flow valuation methodology for cleared interest rate swaps with financial institution counterparties (and the related customer interest rate swaps) to align with changes made by central clearinghouses when they migrated from the Effective Federal Funds Rate to the Secured Overnight Financing Rate for discounting, price alignment, and margining purposes. The changes in valuation methodology are applied prospectively as a change in accounting estimate and are immaterial to the Company’s financial statements. The valuation methodology for uncleared interest rate swaps remains 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 March 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 12 Derivative Financial Instruments 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 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 March 31, 2021, and December 31, 2020: Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) (Level 1) (Level 2) (Level 3) Total March 31, 2021 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 916 $ 164,306 $ — $ 165,222 Debt Securities Issued by States and Political Subdivisions — 24,325 — 24,325 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 1,035 — 1,035 Debt Securities Issued by Corporations — 222,115 — 222,115 Mortgage-Backed Securities: Residential - Government Agencies — 1,585,345 — 1,585,345 Residential - U.S. Government-Sponsored Enterprises — 1,807,929 — 1,807,929 Commercial - Government Agencies — 218,792 — 218,792 Total Mortgage-Backed Securities — 3,612,066 — 3,612,066 Total Investment Securities Available-for-Sale 916 4,023,847 — 4,024,763 Loans Held for Sale — 18,320 — 18,320 Mortgage Servicing Rights — — 919 919 Other Assets 54,612 — — 54,612 Derivatives 1 — 1,934 45,043 46,977 Total Assets Measured at Fair Value on a Recurring Basis as of March 31, 2021 $ 55,528 $ 4,044,101 $ 45,962 $ 4,145,591 Liabilities: Derivatives 1 $ — $ 2,441 $ 29,561 $ 32,002 Total Liabilities Measured at Fair Value on a Recurring Basis as of March 31, 2021 $ — $ 2,441 $ 29,561 $ 32,002 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 — — 658 658 Other Assets 53,410 — — 53,410 Derivatives 1 — 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 $ 95,947 $ 4,024,489 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 12 Derivative Financial Instruments For the three months ended March 31, 2021, and March 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 Three Months Ended March 31, 2021 Balance as of January 1, 2021 $ 958 77,880 Realized and Unrealized Net Gains (Losses): Included in Net Income (39 ) 874 Transfers to Loans Held for Sale (3,016 ) Variation Margin Payments — (60,256 ) Balance as of March 31, 2021 $ 919 15,482 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of March 31, 2021 $ — $ 15,482 Three Months Ended March 31, 2020 Balance as of January 1, 2020 $ 1,126 $ 22,573 Realized and Unrealized Net Gains (Losses): Included in Net Income (25 ) 6,172 Transfers to Loans Held for Sale — (3,653 ) Variation Margin Payments — 55,588 Balance as of March 31, 2020 $ 1,101 $ 80,680 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of March 31, 2020 $ — $ 80,680 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. 2 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 March 31, 2021, and December 31, 2020, the significant unobservable inputs used in the fair value measurements were as follows: (dollars in thousands) Valuation Technique Description Range Weighted Average 1 Fair Value March 31, 2021 Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.67% - 12.98 % 11.27 % $ 22,320 Discount Rate 5.99% - 6.96 % 6.88 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 75.40% - 99.00 % 92.19 % $ 2,704 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 0.15 % $ 12,778 December 31, 2020 Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.71 % - 15.89 % 14.42 % $ 19,652 Discount Rate 5.69 % - 6.28 % 5.81 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 84.10 % - 99.00 % 90.76 % $ 4,947 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 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. The significant unobservable inputs used in the fair value measurement of the Company’s mortgage servicing rights are the weighted-average constant prepayment rate and weighted-average discount rate. Significant increases (decreases) in any of those 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. 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’s Treasury Division enters observable and unobservable inputs into the model to arrive at an estimated fair value. To assess the reasonableness of the fair value measurement, the Treasury Division performs a back-test by comparing the model’s results to historical prepayment data. The Treasury Division also compares the fair value of the Company’s mortgage servicing rights to a value calculated by an independent third-party. Discussions are held with members from the Treasury, Mortgage Banking, and Controllers Divisions, along with the independent third-party to discuss and reconcile the fair value estimates and key assumptions used by the respective parties in arriving at those estimates. A subcommittee of the Company’s Asset/Liability Management Committee is responsible for providing oversight over the valuation methodology and key assumptions. The significant unobservable input used in the fair value measurement of the Company’s IRLCs is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. Generally, the fair value of an IRLC is positive (negative) if the prevailing interest rate is lower (higher) than the IRLC rate. Therefore, an increase in the closing ratio (i.e., higher percentage of loans are estimated to close) will increase the gain or loss. The closing ratio is largely dependent on the loan processing stage that a loan is currently in and the change in prevailing interest rates from the time of the rate lock. The closing ratio is computed by the Company’s secondary marketing system using historical data and the ratio is periodically reviewed by the Company for reasonableness. The unobservable input used in the fair value measurement of the Company’s interest rate swap agreements is the credit spread. This factor represents the risk that a counterparty is either unable or unwilling to settle a transaction in accordance with the underlying contractual terms. A significant increase (decrease) in the credit spread could result in a significantly lower (higher) fair value measurement. The credit spread is based upon the creditworthiness of the borrower and is input into a proprietary model that calculates fair value using probability of default, loss given default, and exposure at default. 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 March 31, 2021, and December 31, 2020. (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance March 31, 2021 Mortgage Servicing Rights - amortization method Level 3 $ 21,401 $ (1,702 ) 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. During the fourth quarter of 2020, the Company recorded a total impairment charge of $7.0 million to write-down the net book value of 12 branches, cash-only ATMs, and a residual value of a leveraged lease. The impairment charge (included in net occupancy expense $3.6 million, interest and fees on loans and leases $3.0 million, and net equipment expense $0.4 million in the Company's consolidated statements of income) was recorded in the fourth quarter of 2020. The Company fully wrote-down the net book value of right-of-use assets and lease hold improvements due to the decision to close 12 branches. The carrying value of the ATMs and leveraged lease were reduced to estimated fair value less cost to sell based on recent appraisals, market conditions, and/or management judgment. Due to the use of significant unobservable inputs combined with significant management judgment regarding the fair value of the se assets, the carrying value was deemed a Level 3 measurement. Fair Value Option The Company elects the fair value option for all residential mortgage loans held for sale. This election allows for a more effective offset of the changes in fair values of the loans held for sale and the derivative financial instruments used to financially hedge them without having to apply complex hedge accounting requirements. As noted above, 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. 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 March 31, 2021 and December 31, 2020. (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal March 31, 2021 Loans Held for Sale $ 18,320 $ 18,003 $ 317 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 three months ended March 31, 2021, and March 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 March 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 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 Carrying Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) Amount Fair Value (Level 1) (Level 2) (Level 3) March 31, 2021 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,464,360 $ 3,477,346 $ 7,333 $ 3,470,011 $ — Loans 1 11,758,861 12,058,054 — — 12,058,054 Financial Instruments - Liabilities Time Deposits 1,475,392 1,478,713 — 1,478,713 — Securities Sold Under Agreements to Repurchase 600,490 637,399 — 637,399 — Other Debt 2 50,000 51,019 — 51,019 — December 31, 2020 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,262,727 $ 3,348,693 $ 7,500 $ 3,341,193 $ — Loans 1 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 2 50,000 51,546 — 51,546 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes finance lease obligations.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	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 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”). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. Intercompany accounts and transactions have been eliminated in consolidation. Certain prior period information has been reclassified to conform to the current period presentation. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for the full fiscal year or for any future period. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and accompanying notes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements 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.
Variable Interest Entities	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 (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses or the right to receive benefits that could be significant to the VIE. The Company participates in limited partnerships or limited liability companies that sponsor low-income housing projects. These entities 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 entity, the low-income residency targets must be maintained. For pre-2015 investments, 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. Beginning January 1, 2015, new investments that meet the requirements of the proportional amortization are recognized based on this method. Unfunded commitments to fund these low-income housing entities were $44.6 million and $53.0 million as of March 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 6 Affordable Housing Projects Tax Credit Partnerships 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 $138.4 million and $143.0 million as of March 31, 2021, and December 31, 2020, respectively, and is included in other assets in the consolidated statements of condition.
Allowance for Credit Losses - Loans and Leases (the “Allowance”)	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). 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 considers future economic conditions and portfolio performance as part of a reasonable and supportable forecast period. 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 a qualitative adjustment 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. As of the January 1, 2020, implementation date, and following the one-year R&S loss forecast period, the Company chose a reversion back to average historical loss rates using a straight line method based on forecasted and relatively benign economic conditions at the measurement date, with the exception of the home equity portfolio. For the home equity portfolio, the Company elected to revert back to average historical loss rates using a straight line method over the halfway point of the average life of the portfolio. The halfway point is used for the home equity portfolio given the longer average life length compared to the other consumer portfolios. Since the first quarter of 2020, 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 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. The Company also carries a limited portfolio of HTM municipal bonds. As of March 31, 2021, the entire portfolio consisted of State of Hawaii bonds carrying a Moody’s rating of Aa2, with a portion of these bonds escrowed to maturity. To estimate the expected credit losses, the Company utilized the probability of default (“PD”)/loss given default (“LGD”) methodology. The PD, which represents the percentage likelihood that a bond will default over a given time period, is primarily based upon the bond’s current credit rating and maturity and computed using Moody’s rating transition matrix, which provides the probability of a rating migrating to default within a one-year period (adjustments are made for longer maturities). The LGD, which represents the percentage of loss if a default occurs, is based on the median recovery rate for municipals according to Moody’s. The Company’s exposure at default, represented by the carrying value of the municipal bond portfolio, is multiplied with the PD and the LGD to arrive at the expected credit loss. Management may exercise discretion to make adjustments based on environmental factors. As of March 31, 2021, the Company determined that the expected credit loss on its municipal bond portfolio was de minimis, and therefore, an allowance for credit losses was not recorded. See Note 3 Investment 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 March 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 Accrued Interest Receivable (“AIR”) Upon adoption of ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments” • Presenting AIR separately within another consolidated statements of condition line item. • Excluding AIR that is included in the amortized cost of financing receivables from related disclosure requirements. • Continuing our policy to write off AIR by reversing interest income. For commercial loans, the write off typically occurs upon becoming 90 days past due. For consumer loans, the write off typically occurs upon becoming 120 days past due. Historically, the Company has not experienced uncollectible AIR on its investment securities. However, the Company would generally write off AIR by reversing interest income if the Company does not reasonably expect to receive payments. Due to the timely manner in which AIR is written off, the amounts of such write offs are immaterial. • Not measuring an allowance for credit losses for AIR due to the Company’s policy of writing off uncollectible AIR in a timely manner, as described above. • The Company began offering loan modifications to assist borrowers negatively impacted by the COVID-19 national emergency. In general, the Company does not classify such loans as nonperforming and continues to accrue and recognize interest income during the forbearance period. For these loans, the Company evaluates the need to record an allowance for the related AIR as any amounts that may become uncollectible may not be considered written off in a timely manner. As of March 31, 2021, and December 31, 2020, the Company recorded an AIR allowance of $2.4 million and $2.7 million, respectively. The allowance was recorded as a contra-asset against AIR with the offset to provision for credit losses. In addition, the Company elected to deduct the AIR from the AIR allowance (rather than reversing interest income) when the AIR is deemed uncollectible, which generally occurs when the related loan is placed on nonaccrual status or is charged-off. See the Operating, Accounting and Reporting Considerations related to COVID-19 section below for further discussion on COVID-19 loan modifications. 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”) 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), with adjustments to the reserve recognized in provision for credit losses in the consolidated statements of income. 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. Operating, Accounting and Reporting Considerations related to COVID-19 The COVID-19 pandemic has negatively impacted the global economy, including Hawaii and the Pacific Islands. In response to this crisis, the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was passed by Congress and signed into law on March 27, 2020. The CARES Act, along with subsequent relief programs, provided substantial funding to fight the COVID-19 pandemic and stimulate the economy by supporting individuals and businesses through loans, grants, tax changes, and other types of relief. Some of the provisions applicable to the Company include, but are not limited to: • Accounting for Loan Modifications – Section 4013 of the CARES Act provides that a financial institution may elect to suspend (1) the requirements under GAAP for certain loan modifications that would otherwise be categorized as a TDR and (2) any determination that such loan modifications would be considered a TDR, including the related impairment for accounting purposes. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. • Paycheck Protection Program - The CARES Act established the Paycheck Protection Program (“PPP”), an expansion of the Small Business Administration’s (“SBA”) 7(a) loan program and the Economic Injury Disaster Loan Program (“EIDL”), administered directly by the SBA. On December 27, 2020, the Consolidated Appropriations Act, 2021 (“CAA”) was signed into law. The CAA provides several amendments to the PPP, including additional funding for first and second draws of PPP loans up to March 31, 2021. On March 30, 2021, the PPP Extension Act of 2021 was signed into law, which extends the program to May 31, 2021. The Company is a participant in the PPP. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. Also in response to the COVID-19 pandemic, the Board of Governors of the Federal Reserve System (“FRB”), the Federal Deposit Insurance Corporation (“FDIC”), the National Credit Union Administration (“NCUA”), the Office of the Comptroller of the Currency (“OCC”), and the Consumer Financial Protection Bureau (“CFPB”), in consultation with the state financial regulators (collectively, the “agencies”) issued a joint interagency statement (issued March 22, 2020; revised statement issued April 7, 2020). Some of the provisions applicable to the Company include, but are not limited to: • Accounting for Loan Modifications - Loan modifications that do not meet the conditions of the CARES Act may still qualify as a modification that does not need to be accounted for as a TDR. The agencies confirmed with FASB staff that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief are not TDRs. This includes short-term modifications such as payment deferrals, fee waivers, extensions of repayment terms, or insignificant delays in payment. See Note 4 Loans and Leases and the Allowance for Credit Losses for more information. • Past Due Reporting - With regard to loans not otherwise reportable as past due, financial institutions are not expected to designate loans with deferrals granted due to COVID-19 as past due because of the deferral. A loan’s payment date is governed by the due date stipulated in the legal agreement. If a financial institution agrees to a payment deferral, these loans would not be considered past due during the period of the deferral. • Nonaccrual Status and Charge-offs - During short-term COVID-19 modifications, these loans generally should not be reported as nonaccrual or as classified. The Company began offering short-term loan modifications to assist borrowers during the COVID-19 pandemic . These modifications generally involve principal and/or interest payment deferrals for up to six months. These modifications generally meet the criteria of both Section 4013 of the CARES Act and the joint interagency statement, and therefore, the Company does not account for such loan modifications as TDRs. As the COVID-19 pandemic persists in negatively impacting the economy, the Company continues to offer additional loan modifications to borrowers struggling as a result of COVID-19. Similar to the initial modifications granted, the additional round of loan modifications are granted specifically under Section 4013 of the CARES Act and generally involve 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 . On August 3, 2020 , the Federal Financial Institutions Examination Council on behalf of its members (collectively “the FFIEC members”) issued a joint statement on additional loan accommodations related to COVID-19. The joint statement clarifies that for loan modifications in which Section 4013 is being applied, subsequent modifications could also be eligible under Section 4013. To be eligible, each loan modification must be (1) related to the COVID -19 event; (2) executed on a loan that was not more than 30 days past due as of December 31, 2019; and (3) executed between March 1, 2020, and the earlier of (A) 60 days after the date of termination of the National Emergency or (B) December 31, 2020. The December 31, 2020 deadline was subsequently extended to January 1, 2022 , by the CAA . Substantially all of the Company’s additional round of loan modifications granted under Section 4013 of the CARES Act are in compliance with the aforementioned FFIEC requirements . Accordingly, the Company does not account for such loan modifications as TDRs. In April 2020, the FASB staff issued a Q&A document on accounting for lease concessions related to the effects of the COVID-19 pandemic. The FASB staff noted that entities may elect to not evaluate whether certain concessions provided by lessors to mitigate the effects of COVID-19 on lessees are lease modifications. This option is intended to reduce the operational challenges of individually assessing every COVID-19 related lease concession to determine whether it results in having to apply Topic 842 lease modification guidance. This election is available only for concessions related to the effects of the COVID-19 pandemic that do not result in a substantial increase in either the rights of the lessor or the obligations of the lessee. For entities that choose this election, they may account for the concession as if no changes to the lease contract were made. Under that accounting, a lessor would continue to recognize income. The Company has elected to apply the relief provided by the FASB not to evaluate individual contracts. The Company also elected not to apply the lease modification framework for concessions granted. The Company, as lessor, granted lease concessions on some of its sales-type finance leases for equipment and automobiles. Equipment lease concessions primarily consist of interest-only payments for a six-month period. Regular lease payments resume after the six-month period and the maturity date is extended by six months. Automobile lease concessions primarily consist of six-month extension programs whereby lease payments currently due are deferred and shifted to the end of the lease term. Interest income continues to accrue during the deferral period. As of March 31, 2021, the Company has not offered a material amount of concessions. The Company, as lessor, leases and subleases real property to lessee tenants under operating leases. As of March 31, 2021, no material lease concessions have been granted to lessees. The Company, as lessee, also leases real estate property for branch locations, ATM locations, and office space. As of , the Company has not requested any lease concessions.
Accounting Standards Adopted in 2021	Accounting Standards Adopted in 2021 In December 2019, the FASB issued ASU No. 2019-12, “Simplifying the Accounting for Income Taxes.” In January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope.”

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	3 Months Ended
	Mar. 31, 2021
Cash And Cash Equivalents [Abstract]
Schedule of Reconciliation of Cash and Cash Equivalents	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) March 31, 2021 December 31, 2020 Interest-Bearing Deposits in Other Banks $ 4,506 $ 1,646 Funds Sold 1,101,631 333,022 Cash and Due From Banks 286,717 279,420 Total Cash and Cash Equivalents $ 1,392,854 $ 614,088

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020, were as follows: (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2021 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 165,355 $ 408 $ (541 ) $ 165,222 Debt Securities Issued by States and Political Subdivisions 23,544 785 (4 ) 24,325 Debt Securities Issued by U.S. Government-Sponsored Enterprises 985 51 (1 ) 1,035 Debt Securities Issued by Corporations 219,493 3,589 (967 ) 222,115 Mortgage-Backed Securities: Residential - Government Agencies 1,564,690 28,489 (7,834 ) 1,585,345 Residential - U.S. Government-Sponsored Enterprises 1,835,401 13,646 (41,118 ) 1,807,929 Commercial - Government Agencies 213,467 6,007 (682 ) 218,792 Total Mortgage-Backed Securities 3,613,558 48,142 (49,634 ) 3,612,066 Total $ 4,022,935 $ 52,975 $ (51,147 ) $ 4,024,763 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 7,499 $ — $ (166 ) $ 7,333 Debt Securities Issued by States and Political Subdivisions 33,596 533 — 34,129 Debt Securities Issued by Corporations 11,287 209 — 11,496 Mortgage-Backed Securities: Residential - Government Agencies 1,209,218 26,398 (13,732 ) 1,221,884 Residential - U.S. Government-Sponsored Enterprises 1,962,265 28,181 (25,499 ) 1,964,947 Commercial - Government Agencies 240,495 1,613 (4,551 ) 237,557 Total Mortgage-Backed Securities 3,411,978 56,192 (43,782 ) 3,424,388 Total $ 3,464,360 $ 56,934 $ (43,948 ) $ 3,477,346 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
Analysis of the Contractual Maturities of Investment Securities	The table below presents an analysis of the contractual maturities of the Company’s investment securities as of March 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 $ 52,007 $ 51,965 Due After One Year Through Five Years 71,863 74,454 Due After Five Years Through Ten Years 121,056 121,972 244,926 248,391 Debt Securities Issued by Government Agencies 164,451 164,306 Mortgage-Backed Securities: Residential - Government Agencies 1,564,690 1,585,345 Residential - U.S. Government-Sponsored Enterprises 1,835,401 1,807,929 Commercial - Government Agencies 213,467 218,792 Total Mortgage-Backed Securities 3,613,558 3,612,066 Total $ 4,022,935 $ 4,024,763 Held-to-Maturity: Due in One Year or Less 33,595 34,128 Due After One Year Through Five Years 18,787 18,830 52,382 52,958 Mortgage-Backed Securities: Residential - Government Agencies 1,209,218 1,221,884 Residential - U.S. Government-Sponsored Enterprises 1,962,265 1,964,947 Commercial - Government Agencies 240,495 237,557 Total Mortgage-Backed Securities 3,411,978 3,424,388 Total $ 3,464,360 $ 3,477,346
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 three months ended March 31, 2021, and March 31, 2020: Three Months Ended March 31, (dollars in thousands) 2021 2020 Gross Gains on Sales of Investment Securities $ — $ 77 Gross Losses on Sales of Investment Securities (1,203 ) (1,047 ) Net Gains (Losses) on Sales of Investment Securities $ (1,203 ) $ (970 )
Schedule of AFS Debt Securities in an Unrealized Loss Position	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 March 31, 2021 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 2,833 $ (10 ) $ 96,248 $ (531 ) $ 99,081 $ (541 ) Debt Securities Issued by States and Political Subdivisions 482 (3 ) 25 (1 ) 507 (4 ) Debt Securities Issued by U.S. Government- Sponsored Enterprises 49 (1 ) — — 49 (1 ) Debt Securities Issued by Corporations 39,224 (776 ) 74,809 (191 ) 114,033 (967 ) Mortgage-Backed Securities: Residential - Government Agencies 354,059 (7,613 ) 8,515 (221 ) 362,574 (7,834 ) Residential - U.S. Government-Sponsored Enterprises 1,229,286 (41,118 ) — — 1,229,286 (41,118 ) Commercial-Government Agencies 24,246 (682 ) — — 24,246 (682 ) Total Mortgage-Backed Securities 1,607,591 (49,413 ) 8,515 (221 ) 1,616,106 (49,634 ) Total $ 1,650,179 $ (50,203 ) $ 179,597 $ (944 ) $ 1,829,776 $ (51,147 ) December 31, 2020 Available-for-Sale: 1 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
Schedule of Interest Income from Taxable and Non-taxable Investment Securities	Interest income from taxable and non-taxable investment securities for the three months ended March 31, 2021, and March 31, 2020, were as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Taxable $ 28,856 $ 35,393 Non-Taxable 281 570 Total Interest Income from Investment Securities $ 29,137 $ 35,963
Schedule of Carrying Value of Federal Home Loan Bank of Des Moines Stock and Federal Reserve Bank Stock	As of March 31, 2021, and December 31, 2020, the carrying value of the Company’s Federal Home Loan Bank of Des Moines stock and Federal Reserve Bank stock was as follows: (dollars in thousands) March 31, 2021 December 31, 2020 Federal Home Loan Bank Stock $ 12,000 $ 12,000 Federal Reserve Bank Stock 21,401 21,340 Total $ 33,401 $ 33,340

Loans and Leases and the Allo_2

Loans and Leases and the Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020: (dollars in thousands) March 31, 2021 December 31, 2020 Commercial Commercial and Industrial $ 2,013,981 $ 1,875,293 Commercial Mortgage 2,859,246 2,854,829 Construction 281,164 259,798 Lease Financing 104,980 110,766 Total Commercial 5,259,371 5,100,686 Consumer Residential Mortgage 4,216,976 4,130,513 Home Equity 1,577,500 1,604,538 Automobile 710,407 708,800 Other 1 376,449 395,483 Total Consumer 6,881,332 6,839,334 Total Loans and Leases $ 12,140,703 $ 11,940,020 1
Schedule of Activity in Allowance by Portfolio Segment	The following presents by portfolio segment, the activity in the Allowance for the three months ended March 31, 2021, and March 31, 2020. (dollars in thousands) Commercial Consumer Total Three Months Ended March 31, 2021 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2020) $ 84,847 $ 131,405 $ 216,252 Loans and Leases Charged-Off (248 ) (6,043 ) (6,291 ) Recoveries on Loans and Leases Previously Charged-Off 112 3,263 3,375 Net Loans and Leases Recovered (Charged-Off) (136 ) (2,780 ) (2,916 ) Provision for Credit Losses (1,900 ) (13,093 ) (14,993 ) Balance at End of Period $ 82,811 $ 115,532 $ 198,343 Three Months Ended March 31, 2020 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2020) $ 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 (693 ) (6,484 ) (7,177 ) Recoveries on Loans and Leases Previously Charged-Off 329 3,108 3,437 Net Loans and Leases Recovered (Charged-Off) (364 ) (3,376 ) (3,740 ) Provision for Credit Losses 13,339 20,261 33,600 Balance at End of Period $ 67,987 $ 70,163 $ 138,150
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 March 31, 2021 . Term Loans by Origination Year (dollars in thousands) YTD March 31, 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans and Leases March 31, 2021 Commercial Commercial and Industrial Pass $ 338,648 $ 868,969 $ 116,796 $ 116,999 $ 42,553 $ 106,466 $ 295,977 $ 720 $ 1,887,128 Special Mention 88 32,548 2,040 - - 364 27,586 40 62,666 Classified 270 8,477 107 13,656 711 18,864 22,011 91 64,187 Total Commercial and Industrial $ 339,006 $ 909,994 $ 118,943 $ 130,655 $ 43,264 $ 125,694 $ 345,574 $ 851 $ 2,013,981 Commercial Mortgage Pass $ 150,533 $ 830,847 $ 409,973 $ 340,907 $ 224,916 $ 651,705 $ 73,919 $ - $ 2,682,800 Special Mention 2,101 87,109 28,340 3,073 7,100 18,364 - - 146,087 Classified 858 15,883 651 - 272 12,695 - - 30,359 Total Commercial Mortgage $ 153,492 $ 933,839 $ 438,964 $ 343,980 $ 232,288 $ 682,764 $ 73,919 $ - $ 2,859,246 Construction Pass $ 44,556 $ 106,654 $ 89,590 $ 11,272 $ 894 $ - $ 28,198 $ - $ 281,164 Total Construction $ 44,556 $ 106,654 $ 89,590 $ 11,272 $ 894 $ - $ 28,198 $ - $ 281,164 Lease Financing Pass $ 4,324 $ 19,212 $ 19,450 $ 12,764 $ 3,441 $ 44,528 $ - $ - $ 103,719 Special Mention - 31 47 92 36 78 - - 284 Classified - - 16 961 - - - - 977 Total Lease Financing $ 4,324 $ 19,243 $ 19,513 $ 13,817 $ 3,477 $ 44,606 $ - $ - $ 104,980 Total Commercial $ 541,378 $ 1,969,730 $ 667,010 $ 499,724 $ 279,923 $ 853,064 $ 447,691 $ 851 $ 5,259,371 Consumer Residential Mortgage Pass $ 461,424 $ 1,258,849 $ 507,084 $ 259,764 $ 401,540 $ 1,325,854 $ - $ - $ 4,214,515 Classified - - 294 403 913 851 - - 2,461 Total Residential Mortgage $ 461,424 $ 1,258,849 $ 507,378 $ 260,167 $ 402,453 $ 1,326,705 $ - $ - $ 4,216,976 Home Equity Pass $ - $ - $ - $ - $ - $ 4,233 $ 1,531,403 $ 35,016 $ 1,570,652 Classified - - - - - 74 5,640 1,134 6,848 Total Home Equity $ - $ - $ - $ - $ - $ 4,307 $ 1,537,043 $ 36,150 $ 1,577,500 Automobile Pass $ 78,416 $ 198,814 $ 194,351 $ 140,735 $ 58,966 $ 38,521 $ - $ - $ 709,803 Classified - 142 128 112 122 100 - - 604 Total Automobile $ 78,416 $ 198,956 $ 194,479 $ 140,847 $ 59,088 $ 38,621 $ - $ - $ 710,407 Other 1 Pass $ 23,146 $ 65,620 $ 132,730 $ 81,022 $ 32,567 $ 9,534 $ 29,581 $ 1,421 $ 375,621 Classified - 149 294 218 72 30 60 5 828 Total Other $ 23,146 $ 65,769 $ 133,024 $ 81,240 $ 32,639 $ 9,564 $ 29,641 $ 1,426 $ 376,449 Total Consumer $ 562,986 $ 1,523,574 $ 834,881 $ 482,254 $ 494,180 $ 1,379,197 $ 1,566,684 $ 37,576 $ 6,881,332 Total Loans and Leases $ 1,104,364 $ 3,493,304 $ 1,501,891 $ 981,978 $ 774,103 $ 2,232,261 $ 2,014,375 $ 38,427 $ 12,140,703 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 Commercial Commercial and Industrial Pass $ 944,463 $ 149,024 $ 149,468 $ 49,385 $ 52,354 $ 68,269 $ 342,339 $ 847 $ 1,756,149 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 $ 988,373 $ 150,800 $ 151,734 $ 50,162 $ 52,483 $ 87,530 $ 393,187 $ 1,024 $ 1,875,293 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 Other 1 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
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 March 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 March 31, 2021 Commercial Commercial and Industrial $ 3,398 $ 70 $ 9 $ 293 $ 3,770 $ 2,010,211 $ 2,013,981 $ 257 Commercial Mortgage — — — 8,503 8,503 2,850,743 2,859,246 4,959 Construction — — — — — 281,164 281,164 — Lease Financing — — — — — 104,980 104,980 — Total Commercial 3,398 70 9 8,796 12,273 5,247,098 5,259,371 5,216 Consumer Residential Mortgage 3,510 3,111 4,069 1,804 12,494 4,204,482 4,216,976 404 Home Equity 4,568 2,328 4,906 4,951 16,753 1,560,747 1,577,500 882 Automobile 5,422 1,157 604 — 7,183 703,224 710,407 — Other 1 4,650 1,237 828 — 6,715 369,734 376,449 — Total Consumer 18,150 7,833 10,407 6,755 43,145 6,838,187 6,881,332 1,286 Total $ 21,548 $ 7,903 $ 10,416 $ 15,551 $ 55,418 $ 12,085,285 $ 12,140,703 $ 6,502 As of December 31, 2020 Commercial Commercial and Industrial $ 191 $ 59 $ — $ 441 $ 691 $ 1,874,602 $ 1,875,293 $ 285 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 is still not expected.
Schedule of Non-Accrual Loans and Leases	The following presents the non-accrual loans and leases as of March 31, 2021, and December 31, 2020. March 31, 2021 December 31, 2020 (dollars in thousands) Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Commercial Commercial and Industrial $ 293 $ — $ 293 $ 441 $ — $ 441 Commercial Mortgage 8,503 — 8,503 8,527 — 8,527 Total Commercial 8,796 — 8,796 8,968 — 8,968 Consumer Residential Mortgage 1,679 125 1,804 3,096 127 3,223 Home Equity 4,951 — 4,951 3,958 — 3,958 Total Consumer 6,630 125 6,755 7,054 127 7,181 Total $ 15,426 $ 125 $ 15,551 $ 16,022 $ 127 $ 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 three months ended March 31, 2021, and March 31, 2020. Loans Modified as a TDR for the Three Months Ended March 31, 2021 Loans Modified as a TDR for the Three Months Ended March 31, 2020 Recorded Increase in Recorded Increase in Troubled Debt Restructurings Investment Allowance Investment Allowance (dollars in thousands) Number of Contracts (as of period end) 1 (as of period end) Number of Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 5 $ 112 $ 1 2 $ 99 $ 2 Total Commercial 5 112 1 2 99 2 Consumer Home Equity 1 52 4 — — — Automobile 394 8,287 115 52 893 14 Other 2 214 1,965 79 31 240 10 Total Consumer 609 10,304 198 83 1,133 24 Total 614 $ 10,416 $ 199 85 $ 1,232 $ 26 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. The following presents by class, all loans modified in a TDR that defaulted during the three months ended March 31, 2021, and March 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. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Consumer Automobile 18 $ 281 18 $ 176 Other 2 4 27 5 50 Total Consumer 22 308 23 226 Total 22 $ 308 23 $ 226 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 (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2021
Transfers And Servicing Of Financial Assets [Abstract]
Summary of Carrying Value Under the Fair Value Measurement Method	For the three months ended March 31, 2021, and March 31, 2020, the change in the carrying value of the Company’s mortgage servicing rights accounted for under the fair value measurement method was as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Balance at Beginning of Period $ 958 $ 1,126 Change in Fair Value: Due to Payoffs (39 ) (25 ) Total Changes in Fair Value of Mortgage Servicing Rights (39 ) (25 ) Balance at End of Period $ 919 $ 1,101
Summary of Carrying Value Under the Amortization Method	For the three months ended March 31, 2021, and March 31, 2020, the change in the carrying value of the Company’s mortgage servicing rights accounted for under the amortization method was as follows: Three Months Ended March 31, (dollars in thousands) 2021 2020 Balance at Beginning of Period $ 18,694 $ 23,896 Servicing Rights that Resulted From Asset Transfers 1,680 1,165 Amortization (1,163 ) (1,112 ) Valuation Allowance Recovery (Provision) 2,190 (2,513 ) Balance at End of Period $ 21,401 $ 21,436 Valuation Allowance: Balance at Beginning of Period $ (3,892 ) $ — Valuation Allowance Recovery (Provision) 2,190 (2,513 ) Balance at End of Period $ (1,702 ) $ (2,513 ) Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 18,694 $ 25,714 End of Period $ 21,401 $ 21,436
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 March 31, 2021, and December 31, 2020, were as follows: March 31, 2021 December 31, 2020 Weighted-Average Constant Prepayment Rate 1 11.27 % 14.42 % Weighted-Average Life (in years) 6.03 4.99 Weighted-Average Note Rate 3.79 % 3.87 % Weighted-Average Discount Rate 2 6.88 % 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	A sensitivity analysis of the Company’s fair value of mortgage servicing rights to changes in certain key assumptions as of March 31, 2021, and December 31, 2020, is presented in the following table. (dollars in thousands) March 31, 2021 December 31, 2020 Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (251 ) $ (203 ) Decrease in fair value from 50 bps adverse change (498 ) (401 ) Discount Rate Decrease in fair value from 25 bps adverse change (226 ) (184 ) Decrease in fair value from 50 bps adverse change (447 ) (365 )

Affordable Housing Projects T_2

Affordable Housing Projects Tax Credit Partnerships (Tables)	3 Months Ended
	Mar. 31, 2021
Equity Method Investments And Joint Ventures [Abstract]
Expected Payments for Unfunded Affordable Housing Commitments	As of March 31, 2021, the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2021 $ 15,122 2022 6,757 2023 19,025 2024 173 2025 56 Thereafter 3,424 Total Unfunded Commitments $ 44,557
Schedule of Tax Credits and Other Tax Benefits Recognized and Amortization Expense Related to Affordable Housing	The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three months ended March 31, 2021, and March 31, 2020. Three Months Ended March 31, (dollars in thousands) 2021 2020 Effective Yield Method Tax credits and other tax benefits recognized $ 2,151 $ 2,938 Amortization Expense in Provision for Income Taxes 1,692 2,147 Proportional Amortization Method Tax credits and other tax benefits recognized $ 2,591 $ 1,523 Amortization Expense in Provision for Income Taxes 2,326 1,318

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2021
Offsetting [Abstract]
Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged	The following table presents the remaining contractual maturities of the Company’s repurchase agreements as of March 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 March 31, 2021 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ — $ — $ — $ 490 $ 490 Mortgage-Backed Securities: Residential - Government Agencies — — 77,117 17,352 94,469 Residential - U.S. Government-Sponsored Enterprises — — 497,883 7,648 505,531 Total $ — $ — $ 575,000 $ 25,490 $ 600,490 December 31, 2020 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ 100 $ — $ — $ 490 $ 590 Mortgage-Backed Securities: Residential - Government Agencies — — 83,599 20,210 103,809 Residential - U.S. Government-Sponsored Enterprises — — 491,401 4,790 496,191 Total $ 100 $ — $ 575,000 $ 25,490 $ 600,590
Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements	The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of March 31, 2021, and December 31, 2020. The swap agreements the Company has 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/ Received 1 Net Amount March 31, 2021 Liabilities: Interest Rate Swap Agreements: Institutional Counterparties $ 11,627 $ — $ 11,627 $ — $ 7,071 $ 4,556 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 490 — 490 — 490 — $ 600,490 $ — $ 600,490 $ — $ 600,490 $ — 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 — $ 600,590 $ — $ 600,590 $ — $ 600,590 $ — 1 The application of collateral cannot reduce the net amount below zero. Therefore, excess collateral is not reflected in this table. For repurchase agreements with private institutions, the fair value of investment securities pledged was $631.1 million and $635.2 million as of March 31, 2021, and December 31, 2020, respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $2.2 million and $2.5 million as of March 31, 2021, and December 31, 2020, respectively.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2021
Comprehensive Income Net Of Tax [Abstract]
Components of Other Comprehensive Income	The following table presents the components of other comprehensive income (loss) for the three months ended March 31, 2021, and March 31, 2020: (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended March 31, 2021 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (68,225 ) $ (18,082 ) $ (50,143 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 125 32 93 Net Unrealized Gains (Losses) on Investment Securities (68,100 ) (18,050 ) (50,050 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 662 177 485 Amortization of Prior Service Credit (61 ) (17 ) (44 ) Defined Benefit Plans, Net 601 160 441 Other Comprehensive Income (Loss) $ (67,499 ) $ (17,890 ) $ (49,609 ) Three Months Ended March 31, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 56,556 $ 14,989 $ 41,567 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (77 ) (21 ) (56 ) Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 65 17 48 Net Unrealized Gains (Losses) on Investment Securities 56,544 14,985 41,559 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 570 152 418 Amortization of Prior Service Credit (61 ) (17 ) (44 ) Defined Benefit Plans, Net 509 135 374 Other Comprehensive Income (Loss) $ 57,053 $ 15,120 $ 41,933 1 The amount relates to the amortization/accretion of unrealized net 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.
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, for the three months ended March 31, 2021, and March 31, 2020: (dollars in thousands) Investment Securities- Available- for-Sale Investment Securities- Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, 2021 Balance at Beginning of Period $ 51,495 $ (423 ) $ (43,250 ) $ 7,822 Other Comprehensive Income (Loss) Before Reclassifications (50,143 ) — — (50,143 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 93 441 534 Total Other Comprehensive Income (Loss) (50,143 ) 93 441 (49,609 ) Balance at End of Period $ 1,352 $ (330 ) $ (42,809 ) $ (41,787 ) Three Months Ended March 31, 2020 Balance at Beginning of Period $ 8,359 $ (715 ) $ (38,756 ) $ (31,112 ) Other Comprehensive Income (Loss) Before Reclassifications 41,567 — — 41,567 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (56 ) 48 374 366 Total Other Comprehensive Income (Loss) 41,511 48 374 41,933 Balance at End of Period $ 49,870 $ (667 ) $ (38,382 ) $ 10,821
Reclassification out of Accumulated Other Comprehensive Income	The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three months ended March 31, 2021, and March 31, 2020: 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 Three Months Ended March 31, (dollars in thousands) 2021 2020 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (125 ) $ (65 ) Interest Income 32 17 Provision for Income Tax (93 ) (48 ) Net of Tax Sale of Investment Securities Available-for-Sale — 77 Investment Securities Gains (Losses), Net — (21 ) Provision for Income Tax — 56 Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 61 61 Net Actuarial Losses 2 (662 ) (570 ) (601 ) (509 ) Total Before Tax 160 135 Provision for Income Tax (441 ) (374 ) Net of Tax Total Reclassifications for the Period $ (534 ) $ (366 ) Net of Tax 1 2 Pension Plans and Postretirement Benefit Plan

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Reconciliation of Weighted Average Number of Common Shares Outstanding for Computing Diluted Earnings Per Share and Antidilutive Stock Options and Restricted Stock Outstanding	The following is a reconciliation of the weighted average number of common shares outstanding for computing diluted earnings per share and antidilutive stock options and restricted stock outstanding for the three months ended March 31, 2021, and March 31, 2020: Three Months Ended March 31, 2021 2020 Denominator for Basic Earnings Per Share 39,827,590 39,681,611 Dilutive Effect of Equity Based Awards 243,887 235,375 Denominator for Diluted Earnings Per Share 40,071,477 39,916,986 Antidilutive Stock Options and Restricted Stock Outstanding 267,741 106,602

Business Segments (Tables)

Business Segments (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Selected Business Segment Financial Information	Selected business segment financial information as of and for the three months ended March 31, 2021, and March 31, 2020, were as follows: (dollars in thousands) Consumer Banking Commercial Banking Treasury and Other Consolidated Total Three Months Ended March 31, 2021 Net Interest Income $ 69,762 $ 47,143 $ 3,664 $ 120,569 Provision for Credit Losses 2,866 50 (17,216 ) (14,300 ) Net Interest Income After Provision for Credit Losses 66,896 47,093 20,880 134,869 Noninterest Income 33,698 7,858 1,414 42,970 Noninterest Expense (78,181 ) (15,677 ) (5,007 ) (98,865 ) Income Before Provision for Income Taxes 22,413 39,274 17,287 78,974 Provision for Income Taxes (5,474 ) (9,558 ) (3,993 ) (19,025 ) Net Income $ 16,939 $ 29,716 $ 13,294 $ 59,949 Total Assets as of March 31, 2021 $ 7,556,756 $ 5,224,386 $ 9,166,129 $ 21,947,271 Three Months Ended March 31, 2020 1 Net Interest Income $ 73,914 $ 45,237 $ 6,815 $ 125,966 Provision for Credit Losses 3,451 290 29,859 33,600 Net Interest Income After Provision for Credit Losses 70,463 44,947 (23,044 ) 92,366 Noninterest Income 32,590 11,735 1,824 46,149 Noninterest Expense (70,746 ) (17,346 ) (8,220 ) (96,312 ) Income Before Provision for Income Taxes 32,307 39,336 (29,440 ) 42,203 Provision for Income Taxes (8,116 ) (9,555 ) 10,210 (7,461 ) Net Income $ 24,191 $ 29,781 $ (19,230 ) $ 34,742 Total Assets as of March 31, 2020 1 $ 7,388,217 $ 4,728,651 $ 6,425,365 $ 18,542,233 1

Pension Plans and Postretirem_2

Pension Plans and Postretirement Benefit Plan (Tables)	3 Months Ended
	Mar. 31, 2021
Compensation And Retirement Disclosure [Abstract]
Schedule of Components of Net Periodic Benefit Cost	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 three months ended March 31, 2021, and March 31, 2020. Pension Benefits Postretirement Benefits (dollars in thousands) 2021 2020 2021 2020 Three Months Ended March 31, Service Cost $ — $ — $ 176 $ 151 Interest Cost 727 900 206 231 Expected Return on Plan Assets (1,148 ) (1,258 ) — — Amortization of: Prior Service Credit — — (61 ) (61 ) Net Actuarial Losses 662 570 — — Net Periodic Benefit Cost $ 241 $ 212 $ 321 $ 321

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020, were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 100,322 $ 2,704 $ 102,881 $ 4,947 Forward Commitments 102,778 748 158,759 (740 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 1,370,386 24,416 1,362,778 90,130 Pay Fixed/Receive Variable Swaps 1,370,386 (11,627 ) 1,362,778 (17,197 ) Foreign Exchange Contracts 88,919 2,345 90,587 866 Conversion Rate Swap Agreement 129,020 — 133,286 —
Derivative Financial Instruments, their Fair Values, and Balance Sheet Location	The following table presents the Company’s derivative financial instruments, their fair values, and their location in the consolidated statements of condition as of March 31, 2021, and December 31, 2020: Derivative Financial Instruments March 31, 2021 December 31, 2020 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 2,704 $ — $ 4,947 $ — Forward Commitments 794 46 — 740 Interest Rate Swap Agreements 42,339 29,561 90,342 17,409 Foreign Exchange Contracts 1,140 2,395 878 12 Total $ 46,977 $ 32,002 $ 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	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 three months ended March 31, 2021, and March 31, 2020: Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Not Designated as Hedging Instruments Recognized in the March 31, (dollars in thousands) Statements of Income 2021 2020 Interest Rate Lock Commitments Mortgage Banking $ 773 $ 6,303 Forward Commitments Mortgage Banking 3,227 (2,184 ) Interest Rate Swap Agreements Other Noninterest Income 1,604 6,438 Foreign Exchange Contracts Other Noninterest Income 271 714 Total $ 5,875 $ 11,271

Commitments, Contingencies, a_2

Commitments, Contingencies, and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Credit Commitments	The Company’s credit commitments as of March 31, 2021, and December 31, 2020, were as follows: (dollars in thousands) March 31, 2021 December 31, 2020 Unfunded Commitments to Extend Credit $ 2,837,258 $ 2,787,123 Standby Letters of Credit 102,531 100,186 Commercial Letters of Credit 11,321 10,511 Total Credit Commitments $ 2,951,110 $ 2,897,820

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	3 Months Ended
	Mar. 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 March 31, 2021, and December 31, 2020: Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) (Level 1) (Level 2) (Level 3) Total March 31, 2021 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 916 $ 164,306 $ — $ 165,222 Debt Securities Issued by States and Political Subdivisions — 24,325 — 24,325 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 1,035 — 1,035 Debt Securities Issued by Corporations — 222,115 — 222,115 Mortgage-Backed Securities: Residential - Government Agencies — 1,585,345 — 1,585,345 Residential - U.S. Government-Sponsored Enterprises — 1,807,929 — 1,807,929 Commercial - Government Agencies — 218,792 — 218,792 Total Mortgage-Backed Securities — 3,612,066 — 3,612,066 Total Investment Securities Available-for-Sale 916 4,023,847 — 4,024,763 Loans Held for Sale — 18,320 — 18,320 Mortgage Servicing Rights — — 919 919 Other Assets 54,612 — — 54,612 Derivatives 1 — 1,934 45,043 46,977 Total Assets Measured at Fair Value on a Recurring Basis as of March 31, 2021 $ 55,528 $ 4,044,101 $ 45,962 $ 4,145,591 Liabilities: Derivatives 1 $ — $ 2,441 $ 29,561 $ 32,002 Total Liabilities Measured at Fair Value on a Recurring Basis as of March 31, 2021 $ — $ 2,441 $ 29,561 $ 32,002 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 — — 658 658 Other Assets 53,410 — — 53,410 Derivatives 1 — 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 $ 95,947 $ 4,024,489 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 12 Derivative Financial Instruments
Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis	For the three months ended March 31, 2021, and March 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 Three Months Ended March 31, 2021 Balance as of January 1, 2021 $ 958 77,880 Realized and Unrealized Net Gains (Losses): Included in Net Income (39 ) 874 Transfers to Loans Held for Sale (3,016 ) Variation Margin Payments — (60,256 ) Balance as of March 31, 2021 $ 919 15,482 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of March 31, 2021 $ — $ 15,482 Three Months Ended March 31, 2020 Balance as of January 1, 2020 $ 1,126 $ 22,573 Realized and Unrealized Net Gains (Losses): Included in Net Income (25 ) 6,172 Transfers to Loans Held for Sale — (3,653 ) Variation Margin Payments — 55,588 Balance as of March 31, 2020 $ 1,101 $ 80,680 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of March 31, 2020 $ — $ 80,680 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. 2 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.
Summary of the Significant Unobservable Inputs	For Level 3 assets and liabilities measured at fair value on a recurring or nonrecurring basis as of March 31, 2021, and December 31, 2020, the significant unobservable inputs used in the fair value measurements were as follows: (dollars in thousands) Valuation Technique Description Range Weighted Average 1 Fair Value March 31, 2021 Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.67% - 12.98 % 11.27 % $ 22,320 Discount Rate 5.99% - 6.96 % 6.88 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 75.40% - 99.00 % 92.19 % $ 2,704 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 0.15 % $ 12,778 December 31, 2020 Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.71 % - 15.89 % 14.42 % $ 19,652 Discount Rate 5.69 % - 6.28 % 5.81 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 84.10 % - 99.00 % 90.76 % $ 4,947 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 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.
Schedule of Assets Measured at Fair Value on 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 March 31, 2021, and December 31, 2020. (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance March 31, 2021 Mortgage Servicing Rights - amortization method Level 3 $ 21,401 $ (1,702 ) 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	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 March 31, 2021 and December 31, 2020. (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal March 31, 2021 Loans Held for Sale $ 18,320 $ 18,003 $ 317 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	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 March 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 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 Carrying Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) Amount Fair Value (Level 1) (Level 2) (Level 3) March 31, 2021 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,464,360 $ 3,477,346 $ 7,333 $ 3,470,011 $ — Loans 1 11,758,861 12,058,054 — — 12,058,054 Financial Instruments - Liabilities Time Deposits 1,475,392 1,478,713 — 1,478,713 — Securities Sold Under Agreements to Repurchase 600,490 637,399 — 637,399 — Other Debt 2 50,000 51,019 — 51,019 — December 31, 2020 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,262,727 $ 3,348,693 $ 7,500 $ 3,341,193 $ — Loans 1 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 2 50,000 51,546 — 51,546 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes finance lease obligations.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)segment	Dec. 31, 2020USD ($)	Mar. 31, 2020USD ($)
Summary Of Significant Accounting Policies [Line Items]
Unfunded commitments to fund low-income housing partnerships	$ 44,557
Variable interest entity, nonconsolidated, carrying amount, assets	$ 21,947,271	$ 20,603,651	$ 18,542,233
Number of portfolio segments of loans and leases (commercial and consumer) | segment	2
AIR allowance	$ 2,400	2,700
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
Other Liabilities
Summary Of Significant Accounting Policies [Line Items]
Unfunded commitments to fund low-income housing partnerships	$ 44,600	53,000
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	$ 138,400	$ 143,000

Cash and Cash Equivalents - Sch

Cash and Cash Equivalents - Schedule of Reconciliation of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Cash And Cash Equivalents [Abstract]
Interest-Bearing Deposits in Other Banks	$ 4,506	$ 1,646
Funds Sold	1,101,631	333,022
Cash and Due From Banks	286,717	279,420
Total Cash and Cash Equivalents	$ 1,392,854	$ 614,088

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Available-for-Sale:
Available-for-Sale: Amortized Cost	$ 4,022,935	$ 3,721,636
Available-for-Sale: Gross Unrealized Gains	52,975	72,428
Available-for-Sale: Gross Unrealized Losses	(51,147)	(2,375)
Available-for-Sale: Fair Value	4,024,763	3,791,689
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	3,464,360	3,262,727
Held-to-Maturity: Gross Unrealized Gains	56,934	86,494
Held-to-Maturity: Gross Unrealized Losses	(43,948)	(528)
Held-to-Maturity: Fair Value	3,477,346	3,348,693
Debt Securities Issued by the U.S. Treasury and Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	165,355	174,409
Available-for-Sale: Gross Unrealized Gains	408	427
Available-for-Sale: Gross Unrealized Losses	(541)	(591)
Available-for-Sale: Fair Value	165,222	174,245
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	7,499	7,500
Held-to-Maturity: Gross Unrealized Gains		8
Held-to-Maturity: Gross Unrealized Losses	(166)	(8)
Held-to-Maturity: Fair Value	7,333	7,500
Debt Securities Issued by States and Political Subdivisions
Available-for-Sale:
Available-for-Sale: Amortized Cost	23,544	23,540
Available-for-Sale: Gross Unrealized Gains	785	1,301
Available-for-Sale: Gross Unrealized Losses	(4)	(1)
Available-for-Sale: Fair Value	24,325	24,840
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	33,596	33,763
Held-to-Maturity: Gross Unrealized Gains	533	741
Held-to-Maturity: Fair Value	34,129	34,504
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	985	985
Available-for-Sale: Gross Unrealized Gains	51	77
Available-for-Sale: Gross Unrealized Losses	(1)	0
Available-for-Sale: Fair Value	1,035	1,062
Debt Securities Issued by Corporations
Available-for-Sale:
Available-for-Sale: Amortized Cost	219,493	220,717
Available-for-Sale: Gross Unrealized Gains	3,589	4,844
Available-for-Sale: Gross Unrealized Losses	(967)	(956)
Available-for-Sale: Fair Value	222,115	224,605
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	11,287	12,031
Held-to-Maturity: Gross Unrealized Gains	209	251
Held-to-Maturity: Fair Value	11,496	12,282
Residential - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,564,690	1,561,603
Available-for-Sale: Gross Unrealized Gains	28,489	33,657
Available-for-Sale: Gross Unrealized Losses	(7,834)	(445)
Available-for-Sale: Fair Value	1,585,345	1,594,815
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	1,209,218	917,459
Held-to-Maturity: Gross Unrealized Gains	26,398	30,580
Held-to-Maturity: Gross Unrealized Losses	(13,732)	(29)
Held-to-Maturity: Fair Value	1,221,884	948,010
Residential - U.S. Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,835,401	1,497,353
Available-for-Sale: Gross Unrealized Gains	13,646	21,254
Available-for-Sale: Gross Unrealized Losses	(41,118)	(324)
Available-for-Sale: Fair Value	1,807,929	1,518,283
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	1,962,265	2,099,053
Held-to-Maturity: Gross Unrealized Gains	28,181	51,735
Held-to-Maturity: Gross Unrealized Losses	(25,499)	(291)
Held-to-Maturity: Fair Value	1,964,947	2,150,497
Commercial - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	213,467	243,029
Available-for-Sale: Gross Unrealized Gains	6,007	10,868
Available-for-Sale: Gross Unrealized Losses	(682)	(58)
Available-for-Sale: Fair Value	218,792	253,839
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	240,495	192,921
Held-to-Maturity: Gross Unrealized Gains	1,613	3,179
Held-to-Maturity: Gross Unrealized Losses	(4,551)	(200)
Held-to-Maturity: Fair Value	237,557	195,900
Mortgage-Backed Securities
Available-for-Sale:
Available-for-Sale: Amortized Cost	3,613,558	3,301,985
Available-for-Sale: Gross Unrealized Gains	48,142	65,779
Available-for-Sale: Gross Unrealized Losses	(49,634)	(827)
Available-for-Sale: Fair Value	3,612,066	3,366,937
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	3,411,978	3,209,433
Held-to-Maturity: Gross Unrealized Gains	56,192	85,494
Held-to-Maturity: Gross Unrealized Losses	(43,782)	(520)
Held-to-Maturity: Fair Value	$ 3,424,388	$ 3,294,407

Investment Securities - Additio

Investment Securities - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)securityshares	Jun. 30, 2020USD ($)shares	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 47,917			$ 49,303
Carrying Value Of Investment Securities Pledged	$ 3,600,000			3,600,000
Number of available for sale debt securities in unrealized loss positions | security	155
Gross Gains on Sales of Investment Securities			$ 77
Visa Class B Restricted Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Conversion ratio	0.016228
Gross Gains on Sales of Investment Securities		$ 14,200
Equity securities remaining, shares | shares	0	80,214
Available-for-sale Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 6,700			6,600
Held-to-maturity Securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Accrued interest receivable	$ 7,100			$ 6,800

Investment Securities - Analysi

Investment Securities - Analysis of the Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Rolling Maturity[Abstract]
Due in One Year or Less	$ 52,007
Due After One Year Through Five Years	71,863
Due After Five Years Through Ten Years	121,056
Amortized Cost, Total	244,926
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-Sale: Amortized Cost, Total	4,022,935	$ 3,721,636
Due in One Year or Less	51,965
Due After One Year Through Five Years	74,454
Due After Five Years Through Ten Years	121,972
Fair Value, Total	248,391
Available-for-Sale: Fair Value	4,024,763	3,791,689
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Rolling Maturities (Abstract]
Due in One Year or Less	33,595
Due After One Year Through Five Years	18,787
Amortized Cost, Total	52,382
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Due in One Year or Less	34,128
Due After One Year Through Five Years	18,830
Fair Value, Total	52,958
Held-to-Maturity: Amortized Cost	3,464,360
Held-to-Maturity: Fair Value	3,477,346	3,348,693
Debt Securities Issued by Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	164,451
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	164,306
Residential - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	1,564,690
Available-for-Sale: Amortized Cost, Total	1,564,690	1,561,603
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,585,345
Available-for-Sale: Fair Value	1,585,345	1,594,815
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	1,209,218
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	1,221,884
Held-to-Maturity: Fair Value	1,221,884	948,010
Residential - U.S. Government-Sponsored Enterprises
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	1,835,401
Available-for-Sale: Amortized Cost, Total	1,835,401	1,497,353
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,807,929
Available-for-Sale: Fair Value	1,807,929	1,518,283
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	1,962,265
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	1,964,947
Held-to-Maturity: Fair Value	1,964,947	2,150,497
Commercial - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	213,467
Available-for-Sale: Amortized Cost, Total	213,467	243,029
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	218,792
Available-for-Sale: Fair Value	218,792	253,839
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	240,495
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	237,557
Held-to-Maturity: Fair Value	237,557	195,900
Mortgage-Backed Securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities: Amortized Cost	3,613,558
Available-for-Sale: Amortized Cost, Total	3,613,558	3,301,985
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	3,612,066
Available-for-Sale: Fair Value	3,612,066	3,366,937
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	3,411,978
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	3,424,388
Held-to-Maturity: Fair Value	$ 3,424,388	$ 3,294,407

Investment Securities - Sched_2

Investment Securities - Schedule of Gains and Losses From Sales of Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments Debt And Equity Securities [Abstract]
Gross Gains on Sales of Investment Securities		$ 77
Gross Losses on Sales of Investment Securities	$ (1,203)	(1,047)
Net Gains (Losses) on Sales of Investment Securities	$ (1,203)	$ (970)

Investment Securities - Sched_3

Investment Securities - Schedule of AFS Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 1,650,179	$ 318,953
Less Than 12 Months, Gross Unrealized Losses	(50,203)	(1,499)
12 Months or Longer, Fair Value	179,597	165,159
12 Months or Longer, Gross Unrealized Losses	(944)	(876)
Total Fair Value	1,829,776	484,112
Total Gross Unrealized Losses	(51,147)	(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	2,833	21,338
Less Than 12 Months, Gross Unrealized Losses	(10)	(42)
12 Months or Longer, Fair Value	96,248	87,070
12 Months or Longer, Gross Unrealized Losses	(531)	(549)
Total Fair Value	99,081	108,408
Total Gross Unrealized Losses	(541)	(591)
Debt Securities Issued by States and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	482
Less Than 12 Months, Gross Unrealized Losses	(3)
12 Months or Longer, Fair Value	25	26
12 Months or Longer, Gross Unrealized Losses	(1)	(1)
Total Fair Value	507	26
Total Gross Unrealized Losses	(4)	(1)
Debt Securities Issued by Government-Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	49
Less Than 12 Months, Gross Unrealized Losses	(1)
Total Fair Value	49
Total Gross Unrealized Losses	(1)
Debt Securities Issued by Corporations
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	39,224	65,000
Less Than 12 Months, Gross Unrealized Losses	(776)	(853)
12 Months or Longer, Fair Value	74,809	50,000
12 Months or Longer, Gross Unrealized Losses	(191)	(103)
Total Fair Value	114,033	115,000
Total Gross Unrealized Losses	(967)	(956)
Residential - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	354,059	113,538
Less Than 12 Months, Gross Unrealized Losses	(7,613)	(222)
12 Months or Longer, Fair Value	8,515	28,063
12 Months or Longer, Gross Unrealized Losses	(221)	(223)
Total Fair Value	362,574	141,601
Total Gross Unrealized Losses	(7,834)	(445)
Residential - U.S. Government-Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	1,229,286	94,002
Less Than 12 Months, Gross Unrealized Losses	(41,118)	(324)
Total Fair Value	1,229,286	94,002
Total Gross Unrealized Losses	(41,118)	(324)
Commercial - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	24,246	25,075
Less Than 12 Months, Gross Unrealized Losses	(682)	(58)
Total Fair Value	24,246	25,075
Total Gross Unrealized Losses	(682)	(58)
Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	1,607,591	232,615
Less Than 12 Months, Gross Unrealized Losses	(49,413)	(604)
12 Months or Longer, Fair Value	8,515	28,063
12 Months or Longer, Gross Unrealized Losses	(221)	(223)
Total Fair Value	1,616,106	260,678
Total Gross Unrealized Losses	$ (49,634)	$ (827)

Investment Securities - Sched_4

Investment Securities - Schedule of Interest Income From Taxable and Non-Taxable Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments Debt And Equity Securities [Abstract]
Taxable	$ 28,856	$ 35,393
Non-Taxable	281	570
Total Interest Income from Investment Securities	$ 29,137	$ 35,963

Investment Securities - Sched_5

Investment Securities - Schedule of Carrying Value of Federal Home Loan Bank of Des Moines Stock and Federal Reserve Bank Stock (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Federal Home Loan Bank Stock	$ 12,000	$ 12,000
Federal Reserve Bank Stock	21,401	21,340
Total	$ 33,401	$ 33,340

Loans and Leases and the Allo_3

Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Loan and lease portfolio
Loans and Leases	$ 12,140,703	$ 11,940,020
Commercial
Loan and lease portfolio
Loans and Leases	5,259,371	5,100,686
Commercial | Commercial and Industrial
Loan and lease portfolio
Loans and Leases	2,013,981	1,875,293
Commercial | Commercial Mortgage
Loan and lease portfolio
Loans and Leases	2,859,246	2,854,829
Commercial | Construction
Loan and lease portfolio
Loans and Leases	281,164	259,798
Commercial | Lease Financing
Loan and lease portfolio
Loans and Leases	104,980	110,766
Consumer
Loan and lease portfolio
Loans and Leases	6,881,332	6,839,334
Consumer | Other
Loan and lease portfolio
Loans and Leases	376,449	395,483
Consumer | Residential Mortgage
Loan and lease portfolio
Loans and Leases	4,216,976	4,130,513
Consumer | Home Equity
Loan and lease portfolio
Loans and Leases	1,577,500	1,604,538
Consumer | Automobile
Loan and lease portfolio
Loans and Leases	$ 710,407	$ 708,800

Loans and Leases and the Allo_4

Loans and Leases and the Allowance for Credit Losses - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)Loan	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)Loan
Loan and lease portfolio
Net gains related to sales of residential mortgage loans	$ 2,100	$ 3,200
Accrued interest receivable	$ 47,917		$ 49,303
Number of paycheck protection loans | Loan	6,911		4,435
Revolving loans, converted to term loan during the period	$ 900	$ 600
Number of days non-accrual loans are not past due	30 days
Recorded Investment	$ 84,100		$ 72,500
Available commitments to lend additional funds on loans modified as TDR	300		$ 500
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 1,500
Consumer
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 | Loan	419		1,920
Loan and lease modifications, amount - COVID-19	$ 51,100		$ 178,100
Commercial
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 | Loan	118		210
Loan and lease modifications, amount - COVID-19	$ 271,000		$ 311,600
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 | 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%
Classified | Home Equity
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%
Classified | Consumer
Loan and lease portfolio
Number of days past due for loans and leases in classified credit quality indicator	90 days
Minimum
Loan and lease portfolio
Default period past due following modification of loans in TDR (in days)	60 days
Maximum | Residential Mortgage
Loan and lease portfolio
Period of time loan being fully amortized	40 years
Maximum | Land Loan
Loan and lease portfolio
Period of time loan being fully amortized	360 months
Extending balloon payments	5 years
PPP Loans, Administered by the SBA
Loan and lease portfolio
Loans interest rate	1.00%
Long-term debt, gross	$ 744,800		528,100
PPP Loans, Administered by the SBA | Minimum
Loan and lease portfolio
Loans maturity period	2 years
PPP Loans, Administered by the SBA | Maximum
Loan and lease portfolio
Loans maturity period	5 years
Accrued Interest Receivable
Loan and lease portfolio
Accrued interest receivable	$ 34,100		$ 35,900

Loans and Leases and the Allo_5

Loans and Leases and the Allowance for Credit Losses - Schedule of Activity in Allowance by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance for Credit Losses:
Balance at Beginning of Period	$ 216,252	$ 110,027
Loans and Leases Charged-Off	(6,291)	(7,177)
Recoveries on Loans and Leases Previously Charged-Off	3,375	3,437
Net Loans and Leases Recovered (Charged-Off)	(2,916)	(3,740)
Provision for Credit Losses	(14,993)	33,600
Balance at End of Period	198,343	138,150
CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		(1,737)
January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		108,290
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	84,847	73,801
Loans and Leases Charged-Off	(248)	(693)
Recoveries on Loans and Leases Previously Charged-Off	112	329
Net Loans and Leases Recovered (Charged-Off)	(136)	(364)
Provision for Credit Losses	(1,900)	13,339
Balance at End of Period	82,811	67,987
Commercial | CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		(18,789)
Commercial | January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		55,012
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	131,405	36,226
Loans and Leases Charged-Off	(6,043)	(6,484)
Recoveries on Loans and Leases Previously Charged-Off	3,263	3,108
Net Loans and Leases Recovered (Charged-Off)	(2,780)	(3,376)
Provision for Credit Losses	(13,093)	20,261
Balance at End of Period	$ 115,532	70,163
Consumer | CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		17,052
Consumer | January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Credit Losses:
Balance at Beginning of Period		$ 53,278

Loans and Leases and the Allo_6

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	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	$ 1,104,364	$ 3,669,902
2020	3,493,304	1,701,148
2019	1,501,891	1,078,600
2018	981,978	879,110
2017	774,103	932,627
Prior	2,232,261	1,545,761
Revolving Loans	2,014,375	2,091,726
Revolving Loans Converted to Term Loans	38,427	41,146
Total Loans and Leases	12,140,703	11,940,020
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	541,378	2,078,659
2020	1,969,730	764,275
2019	667,010	531,323
2018	499,724	315,087
2017	279,923	343,502
Prior	853,064	568,609
Revolving Loans	447,691	498,207
Revolving Loans Converted to Term Loans	851	1,024
Total Loans and Leases	5,259,371	5,100,686
Commercial | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	339,006	988,373
2020	909,994	150,800
2019	118,943	151,734
2018	130,655	50,162
2017	43,264	52,483
Prior	125,694	87,530
Revolving Loans	345,574	393,187
Revolving Loans Converted to Term Loans	851	1,024
Total Loans and Leases	2,013,981	1,875,293
Commercial | Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	338,648	944,463
2020	868,969	149,024
2019	116,796	149,468
2018	116,999	49,385
2017	42,553	52,354
Prior	106,466	68,269
Revolving Loans	295,977	342,339
Revolving Loans Converted to Term Loans	720	847
Total Loans and Leases	1,887,128	1,756,149
Commercial | Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	88	11,702
2020	32,548	42
2019	2,040	0
2018	0	0
2017	0	110
Prior	364	95
Revolving Loans	27,586	32,319
Revolving Loans Converted to Term Loans	40	52
Total Loans and Leases	62,666	44,320
Commercial | Commercial and Industrial | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	270	32,208
2020	8,477	1,734
2019	107	2,266
2018	13,656	777
2017	711	19
Prior	18,864	19,166
Revolving Loans	22,011	18,529
Revolving Loans Converted to Term Loans	91	125
Total Loans and Leases	64,187	74,824
Commercial | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	153,492	963,839
2020	933,839	487,545
2019	438,964	353,437
2018	343,980	252,548
2017	232,288	281,267
Prior	682,764	439,324
Revolving Loans	73,919	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,859,246	2,854,829
Commercial | Commercial Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	150,533	847,676
2020	830,847	458,472
2019	409,973	350,363
2018	340,907	245,157
2017	224,916	267,860
Prior	651,705	425,157
Revolving Loans	73,919	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,682,800	2,671,554
Commercial | Commercial Mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	2,101	66,523
2020	87,109	28,418
2019	28,340	291
2018	3,073	7,117
2017	7,100	8,665
Prior	18,364	5,035
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	146,087	116,049
Commercial | Commercial Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	858	49,640
2020	15,883	655
2019	651	2,783
2018	0	274
2017	272	4,742
Prior	12,695	9,132
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	30,359	67,226
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	44,556	106,508
2020	106,654	105,731
2019	89,590	11,275
2018	11,272	8,133
2017	894	0
Prior	0	0
Revolving Loans	28,198	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	281,164	259,798
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	44,556	106,508
2020	106,654	105,731
2019	89,590	11,275
2018	11,272	8,133
2017	894	0
Prior	0	0
Revolving Loans	28,198	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	281,164	259,798
Commercial | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	4,324	19,939
2020	19,243	20,199
2019	19,513	14,877
2018	13,817	4,244
2017	3,477	9,752
Prior	44,606	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	104,980	110,766
Commercial | Lease Financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	4,324	19,906
2020	19,212	20,132
2019	19,450	13,785
2018	12,764	4,202
2017	3,441	9,657
Prior	44,528	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	103,719	109,437
Commercial | Lease Financing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0
2020	31
2019	47
2018	92
2017	36
Prior	78
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	284
Commercial | Lease Financing | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	33
2020	0	67
2019	16	1,092
2018	961	42
2017	0	95
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	977	1,329
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	562,986	1,591,243
2020	1,523,574	936,873
2019	834,881	547,277
2018	482,254	564,023
2017	494,180	589,125
Prior	1,379,197	977,152
Revolving Loans	1,566,684	1,593,519
Revolving Loans Converted to Term Loans	37,576	40,122
Total Loans and Leases	6,881,332	6,839,334
Consumer | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	461,424	1,300,831
2020	1,258,849	576,746
2019	507,378	295,522
2018	260,167	455,197
2017	402,453	545,798
Prior	1,326,705	956,419
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,216,976	4,130,513
Consumer | Residential Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	461,424	1,300,831
2020	1,258,849	576,452
2019	507,084	295,522
2018	259,764	454,165
2017	401,540	545,798
Prior	1,325,854	954,120
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,214,515	4,126,888
Consumer | Residential Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	294
2019	294	0
2018	403	1,032
2017	913	0
Prior	851	2,299
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,461	3,625
Consumer | Home Equity Loan
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	4,307	4,537
Revolving Loans	1,537,043	1,561,364
Revolving Loans Converted to Term Loans	36,150	38,637
Total Loans and Leases	1,577,500	1,604,538
Consumer | Home Equity Loan | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	4,233	4,449
Revolving Loans	1,531,403	1,556,671
Revolving Loans Converted to Term Loans	35,016	37,559
Total Loans and Leases	1,570,652	1,598,679
Consumer | Home Equity Loan | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	74	88
Revolving Loans	5,640	4,693
Revolving Loans Converted to Term Loans	1,134	1,078
Total Loans and Leases	6,848	5,859
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	78,416	219,319
2020	198,956	214,159
2019	194,479	158,387
2018	140,847	68,889
2017	59,088	34,060
Prior	38,621	13,986
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	710,407	708,800
Consumer | Automobile | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	78,416	219,218
2020	198,814	213,914
2019	194,351	158,216
2018	140,735	68,776
2017	58,966	33,899
Prior	38,521	13,850
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	709,803	707,873
Consumer | Automobile | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	101
2020	142	245
2019	128	171
2018	112	113
2017	122	161
Prior	100	136
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	604	927
Consumer | Other Loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	23,146	71,093
2020	65,769	145,968
2019	133,024	93,368
2018	81,240	39,937
2017	32,639	9,267
Prior	9,564	2,210
Revolving Loans	29,641	32,155
Revolving Loans Converted to Term Loans	1,426	1,485
Total Loans and Leases	376,449	395,483
Consumer | Other Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	23,146	71,042
2020	65,620	145,549
2019	132,730	92,993
2018	81,022	39,770
2017	32,567	9,225
Prior	9,534	2,189
Revolving Loans	29,581	32,070
Revolving Loans Converted to Term Loans	1,421	1,485
Total Loans and Leases	375,621	394,323
Consumer | Other Loans | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	51
2020	149	419
2019	294	375
2018	218	167
2017	72	42
Prior	30	21
Revolving Loans	60	85
Revolving Loans Converted to Term Loans	5	0
Total Loans and Leases	$ 828	$ 1,160

Loans and Leases and the Allo_7

Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	$ 15,551	$ 16,149
Total Past Due and Non-Accrual	55,418	52,619
Current	12,085,285	11,887,401
Total Loans and Leases	12,140,703	11,940,020
Non-Accrual Loans and Leases that are Current	6,502	8,355
30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	21,548	16,577
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,903	9,347
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	10,416	10,546
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	8,796	8,968
Total Past Due and Non-Accrual	12,273	9,218
Current	5,247,098	5,091,468
Total Loans and Leases	5,259,371	5,100,686
Non-Accrual Loans and Leases that are Current	5,216	5,268
Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	293	441
Total Past Due and Non-Accrual	3,770	691
Current	2,010,211	1,874,602
Total Loans and Leases	2,013,981	1,875,293
Non-Accrual Loans and Leases that are Current	257	285
Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	8,503
Total Past Due and Non-Accrual	8,503
Current	2,850,743
Total Loans and Leases	2,859,246
Non-Accrual Loans and Leases that are Current	4,959
Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Current	281,164	259,798
Total Loans and Leases	281,164	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
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Current	104,980	110,766
Total Loans and Leases	104,980	110,766
Non-Accrual Loans and Leases that are Current	0	0
Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	8,503	8,527
Total Past Due and Non-Accrual		8,527
Current		2,846,302
Total Loans and Leases	2,859,246	2,854,829
Non-Accrual Loans and Leases that are Current		4,983
Commercial | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,398	191
Commercial | 30 - 59 Days Past Due | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,398	191
Commercial | 30 - 59 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0
Commercial | 30 - 59 Days Past Due | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | 30 - 59 Days Past Due | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | 30 - 59 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due		0
Commercial | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	70	59
Commercial | 60 - 89 Days Past Due | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	70	59
Commercial | 60 - 89 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0
Commercial | 60 - 89 Days Past Due | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | 60 - 89 Days Past Due | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | 60 - 89 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due		0
Commercial | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	9	0
Commercial | Past Due 90 Days or More | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	9	0
Commercial | Past Due 90 Days or More | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0
Commercial | Past Due 90 Days or More | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Past Due 90 Days or More | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Past Due 90 Days or More | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due		0
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	6,755	7,181
Total Past Due and Non-Accrual	43,145	43,401
Current	6,838,187	6,795,933
Total Loans and Leases	6,881,332	6,839,334
Non-Accrual Loans and Leases that are Current	1,286	3,087
Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	6,715	5,328
Current	369,734	390,155
Total Loans and Leases	376,449	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
Non-Accrual	1,804	3,223
Total Past Due and Non-Accrual	12,494	14,629
Current	4,204,482	4,115,884
Total Loans and Leases	4,216,976	4,130,513
Non-Accrual Loans and Leases that are Current	404	2,100
Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	4,951	3,958
Total Past Due and Non-Accrual	16,753	13,946
Current	1,560,747	1,590,592
Total Loans and Leases	1,577,500	1,604,538
Non-Accrual Loans and Leases that are Current	882	987
Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	7,183	9,498
Current	703,224	699,302
Total Loans and Leases	710,407	708,800
Non-Accrual Loans and Leases that are Current	0	0
Consumer | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	18,150	16,386
Consumer | 30 - 59 Days Past Due | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,650	2,556
Consumer | 30 - 59 Days Past Due | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,510	4,049
Consumer | 30 - 59 Days Past Due | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,568	3,423
Consumer | 30 - 59 Days Past Due | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	5,422	6,358
Consumer | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,833	9,288
Consumer | 60 - 89 Days Past Due | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,237	1,612
Consumer | 60 - 89 Days Past Due | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,111	2,083
Consumer | 60 - 89 Days Past Due | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,328	3,378
Consumer | 60 - 89 Days Past Due | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,157	2,215
Consumer | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	10,407	10,546
Consumer | Past Due 90 Days or More | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	828	1,160
Consumer | Past Due 90 Days or More | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,069	5,274
Consumer | Past Due 90 Days or More | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,906	3,187
Consumer | Past Due 90 Days or More | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 604	$ 925

Loans and Leases and the Allo_8

Loans and Leases and the Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	$ 15,426	$ 16,022
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	15,551	16,149
Commercial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	8,796	8,968
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	8,796	8,968
Commercial | Commercial and Industrial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	293	441
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	293	441
Commercial | Commercial Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	8,503	8,527
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	8,503	8,527
Consumer
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	6,630	7,054
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	6,755	7,181
Consumer | Residential Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	1,679	3,096
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	1,804	3,223
Consumer | Home Equity
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	4,951	3,958
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	$ 4,951	$ 3,958

Loans and Leases and the Allo_9

Loans and Leases and the Allowance for Credit Losses - Schedule of Loans Modified in TDR (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)contract	Mar. 31, 2020USD ($)contract
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	614	85
Recorded Investment (as of period end)	$ 10,416	$ 1,232
Increase in Allowance (as of period end)	$ 199	$ 26
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	5	2
Recorded Investment (as of period end)	$ 112	$ 99
Increase in Allowance (as of period end)	$ 1	$ 2
Commercial | Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	5	2
Recorded Investment (as of period end)	$ 112	$ 99
Increase in Allowance (as of period end)	$ 1	$ 2
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	609	83
Recorded Investment (as of period end)	$ 10,304	$ 1,133
Increase in Allowance (as of period end)	$ 198	$ 24
Consumer | Other
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	214	31
Recorded Investment (as of period end)	$ 1,965	$ 240
Increase in Allowance (as of period end)	$ 79	$ 10
Consumer | Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	1	0
Recorded Investment (as of period end)	$ 52	$ 0
Increase in Allowance (as of period end)	$ 4	$ 0
Consumer | Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	394	52
Recorded Investment (as of period end)	$ 8,287	$ 893
Increase in Allowance (as of period end)	$ 115	$ 14

Loans and Leases and the All_10

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	3 Months Ended
	Mar. 31, 2021USD ($)contract	Mar. 31, 2020USD ($)contract
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	22	23
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 308	$ 226
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	22	23
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 308	$ 226
Consumer | Other
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	4	5
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 27	$ 50
Consumer | Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	18	18
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 281	$ 176

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Transfers And Servicing Of Financial Assets [Abstract]
Residential mortgage loans serviced for third parties	$ 2,800		$ 2,800
Servicing income, including late and ancillary fees	$ 1.6	$ 1.9

Mortgage Servicing Rights - Sum

Mortgage Servicing Rights - Summary of Carrying Value Under the Fair Value Measurement Method (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Servicing Assets At Fair Value [Line Items]
Balance at Beginning of Period	$ 958	$ 1,126
Due to Payoffs	(39)	(25)
Total Changes in Fair Value of Mortgage Servicing Rights	(39)	(25)
Balance at End of Period	$ 919	$ 1,101

Mortgage Servicing Rights - S_2

Mortgage Servicing Rights - Summary of Carrying Value Under the Amortization Method (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Mortgage Servicing Rights Accounted for Under the Amortization Method (Rollforward)
Balance at Beginning of Period	$ 18,694	$ 23,896
Servicing Rights that Resulted From Asset Transfers	1,680	1,165
Amortization	(1,163)	(1,112)
Valuation Allowance Recovery (Provision)	2,190	(2,513)
Balance at End of Period	21,401	21,436
Balance at Beginning of Period	(3,892)
Valuation Allowance Recovery (Provision)	2,190	(2,513)
Balance at End of Period	(1,702)	(2,513)
Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method
Beginning of Period	18,694	25,714
End of Period	$ 21,401	$ 21,436

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Key Data and Assumptions Used in Estimating the Fair Value (Details) - Mortgage Servicing Rights	3 Months Ended	12 Months Ended
	Mar. 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)	11.27%	14.42%
Weighted-Average Life (in years)	6 years 10 days	4 years 11 months 26 days
Weighted-Average Note Rate (as a percent)	3.79%	3.87%
Weighted-Average Discount Rate (as a percent)	6.88%	5.81%

Mortgage Servicing Rights - S_3

Mortgage Servicing Rights - Schedule of Sensitivity Analysis of the Fair Value (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$ (251)	$ (203)
Decrease in fair value from 50 bps adverse change	(498)	(401)
Discount Rate
Decrease in fair value from 25 bps adverse change	(226)	(184)
Decrease in fair value from 50 bps adverse change	$ (447)	$ (365)

Affordable Housing Projects T_3

Affordable Housing Projects Tax Credit Partnerships - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Equity Method Investments And Joint Ventures [Abstract]
Net affordable housing tax credit investments and related unfunded commitments	$ 134,800,000		$ 138,900,000
Write down from impairment of LIHTC Investments	$ 0	$ 0

Affordable Housing Projects T_4

Affordable Housing Projects Tax Credit Partnerships - Expected Payments for Unfunded Affordable Housing Commitments (Details) $ in Thousands	Mar. 31, 2021USD ($)
Affordable Housing Tax Credit Investments, Unfunded Commitment [Abstract]
2021	$ 15,122
2022	6,757
2023	19,025
2024	173
2025	56
Thereafter	3,424
Total Unfunded Commitments	$ 44,557

Affordable Housing Projects T_5

Affordable Housing Projects Tax Credit Partnerships - Tax Credits and Other Tax Benefits Recognized and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effective Yield Method
Tax credits and other tax benefits recognized	$ 2,151	$ 2,938
Amortization Expense in Provision for Income Taxes	1,692	2,147
Proportional Amortization Method
Tax credits and other tax benefits recognized	2,591	1,523
Amortization Expense in Provision for Income Taxes	$ 2,326	$ 1,318

Balance Sheet Offsetting - Addi

Balance Sheet Offsetting - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Interest Rate Swap Agreements
Offsetting Assets And Liabilities [Line Items]
Net liability positions, aggregate fair value	$ 11.6	$ 17.2

Balance Sheet Offsetting - Rema

Balance Sheet Offsetting - Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 600,490	$ 600,590
Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	490	590
Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	94,469	103,809
Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	505,531	496,191
Maturity Up To 90 Days
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	100
Maturity Up To 90 Days | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	100
Maturity Up To 90 Days | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity Up To 90 Days | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	575,000	575,000
Maturity 1 To 3 Years | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	77,117	83,599
Maturity 1 To 3 Years | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	497,883	491,401
Maturity After 3 Years
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	25,490	25,490
Maturity After 3 Years | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	490	490
Maturity After 3 Years | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	17,352	20,210
Maturity After 3 Years | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 7,648	$ 4,790

Balance Sheet Offsetting - Sche

Balance Sheet Offsetting - Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 600,490	$ 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	600,490	600,590
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	600,490	600,590
Private Institutions
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	600,000	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	600,000	600,000
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	600,000	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		5
Gross Amounts Offset in the Statements of Condition		0
Net Amounts of Assets Presented in the Statements of Condition		5
Netting Adjustments per Master Netting Arrangements		5
Gross Amounts Not Offset in the Statements of Condition - FV of collateral pledged		0
Derivative Assets, Net Amount		0
Liabilities:
Gross Amounts of Recognized Liabilities	11,627	17,202
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	11,627	17,202
Derivative Liability, Netting Adjustments per Master Netting Arrangements	0	5
Derivative, Collateral, Right to Reclaim Securities	7,071	7,911
Derivative Liabilities, Net Amount	$ 4,556	$ 9,286

Balance Sheet Offsetting - Sc_2

Balance Sheet Offsetting - Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements (Parenthetical) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Private Institutions
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 631.1	$ 635.2
Government Entities
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 2.2	$ 2.5

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - AOCI Components Pre Post & Tax Effect (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Comprehensive Income (Loss), Before Tax:
Net Unrealized Gains (Losses) Arising During the Period	$ (68,225)	$ 56,556
(Gain) Loss on sale, before tax		(77)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	125	65
Net Unrealized Gains (Losses) on Investment Securities	(68,100)	56,544
Amortization of Net Actuarial Losses (Gains)	662	570
Amortization of Prior Service Credit	(61)	(61)
Defined Benefit Plans, Net	601	509
Other Comprehensive Income (Loss)	(67,499)	57,053
Other Comprehensive Income (Loss), Tax Effect:
Net Unrealized Gains (Losses) Arising During the Period	(18,082)	14,989
(Gain) Loss on Sale, Tax Effect		(21)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	32	17
Net Unrealized Gains (Losses) on Investment Securities	(18,050)	14,985
Amortization of Net Actuarial Losses (Gains)	177	152
Amortization of Prior Service Credit	(17)	(17)
Defined Benefit Plans, Net	160	135
Other Comprehensive Income (Loss)	(17,890)	15,120
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) Arising During the Period	(50,143)	41,567
(Gain) Loss on Sale		(56)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	93	48
Net Unrealized Gains (Losses) on Investment Securities	(50,050)	41,559
Amortization of Net Actuarial Losses (Gains)	485	418
Amortization of Prior Service Credit	(44)	(44)
Defined Benefit Plans, Net	441	374
Total Other Comprehensive Income (Loss)	$ (49,609)	$ 41,933

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Change in AOCI Components Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	$ 1,374,507	$ 1,286,832
Total Other Comprehensive Income (Loss)	(49,609)	41,933
Balance at End of Period	1,360,221	1,327,929
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
Other Comprehensive Income (Loss) Before Reclassifications	(50,143)	41,567
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	(56)
Total Other Comprehensive Income (Loss)	(50,143)	41,511
Balance at End of Period	1,352	49,870
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)
Other Comprehensive Income (Loss) Before Reclassifications	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	93	48
Total Other Comprehensive Income (Loss)	93	48
Balance at End of Period	(330)	(667)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(43,250)	(38,756)
Other Comprehensive Income (Loss) Before Reclassifications	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	441	374
Total Other Comprehensive Income (Loss)	441	374
Balance at End of Period	(42,809)	(38,382)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	7,822	(31,112)
Other Comprehensive Income (Loss) Before Reclassifications	(50,143)	41,567
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	534	366
Total Other Comprehensive Income (Loss)	(49,609)	41,933
Balance at End of Period	$ (41,787)	$ 10,821

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) - AOCI Reclass to IS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	$ (19,025)	$ (7,461)
Net Income	59,949	34,742
Salaries and Benefits	(56,251)	(54,463)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income	(534)	(366)
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	(125)	(65)
Provision for Income Tax	32	17
Net Income	(93)	(48)
Reclassification out of Accumulated Other Comprehensive Income | Sale of Investment Securities Available-for-Sale
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	0	(21)
Net Income	0	56
Sale of Investment Securities Available-for-Sale	0	77
Reclassification out of Accumulated Other Comprehensive Income | Prior Service Credit
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	61	61
Reclassification out of Accumulated Other Comprehensive Income | Net Actuarial Losses
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	(662)	(570)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Defined Benefit Plan Items
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	160	135
Net Income	(441)	(374)
Salaries and Benefits	$ (601)	$ (509)

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Reconciliation of Weighted Average Number of Common Shares Outstanding for Computing Diluted Earnings Per Share and Antidilutive Stock Options and Restricted Stock Outstanding (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reconciliation of Diluted Shares
Denominator for Basic Earnings Per Share (in shares)	39,827,590	39,681,611
Dilutive Effect of Equity Based Awards (in shares)	243,887	235,375
Denominator for Diluted Earnings Per Share (in shares)	40,071,477	39,916,986
Antidilutive Stock Options and Restricted Stock Outstanding (in shares)	267,741	106,602

Business Segments - Additional

Business Segments - Additional Information (Details)	3 Months Ended
	Mar. 31, 2021branchatm
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	63
Number of ATM's through which products and services are delivered to customers | atm	361

Business Segments - Selected Bu

Business Segments - Selected Business Segment Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Business segment financial information
Net Interest Income	$ 120,569	$ 125,966
Provision for Credit Losses	(14,300)	33,600
Net Interest Income After Provision for Credit Losses	134,869	92,366
Noninterest Income	42,970	46,149
Noninterest Expense	(98,865)	(96,312)
Income Before Provision for Income Taxes	78,974	42,203
Provision for Income Taxes	(19,025)	(7,461)
Net Income	59,949	34,742
Total Assets	21,947,271	18,542,233	$ 20,603,651
Consumer Banking
Business segment financial information
Net Interest Income	69,762	73,914
Provision for Credit Losses	2,866	3,451
Net Interest Income After Provision for Credit Losses	66,896	70,463
Noninterest Income	33,698	32,590
Noninterest Expense	(78,181)	(70,746)
Income Before Provision for Income Taxes	22,413	32,307
Provision for Income Taxes	(5,474)	(8,116)
Net Income	16,939	24,191
Total Assets	7,556,756	7,388,217
Commercial Banking
Business segment financial information
Net Interest Income	47,143	45,237
Provision for Credit Losses	50	290
Net Interest Income After Provision for Credit Losses	47,093	44,947
Noninterest Income	7,858	11,735
Noninterest Expense	(15,677)	(17,346)
Income Before Provision for Income Taxes	39,274	39,336
Provision for Income Taxes	(9,558)	(9,555)
Net Income	29,716	29,781
Total Assets	5,224,386	4,728,651
Treasury and Other
Business segment financial information
Net Interest Income	3,664	6,815
Provision for Credit Losses	(17,216)	29,859
Net Interest Income After Provision for Credit Losses	20,880	(23,044)
Noninterest Income	1,414	1,824
Noninterest Expense	(5,007)	(8,220)
Income Before Provision for Income Taxes	17,287	(29,440)
Provision for Income Taxes	(3,993)	10,210
Net Income	13,294	(19,230)
Total Assets	$ 9,166,129	$ 6,425,365

Pension Plans and Postretirem_3

Pension Plans and Postretirement Benefit Plan - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	$ 0	$ 0
Interest Cost	727	900
Expected Return on Plan Assets	(1,148)	(1,258)
Amortization of Prior Service Credit	0	0
Amortization of Net Actuarial Losses	662	570
Net Periodic Benefit Cost	241	212
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	176	151
Interest Cost	206	231
Expected Return on Plan Assets	0	0
Amortization of Prior Service Credit	(61)	(61)
Amortization of Net Actuarial Losses	0	0
Net Periodic Benefit Cost	$ 321	$ 321

Pension Plans and Postretirem_4

Pension Plans and Postretirement Benefit Plan - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Employer contributions	$ 0.1
Estimated future employer contributions in current fiscal year	0.4
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Employer contributions	0.3
Estimated future employer contributions in current fiscal year	$ 1.2

Derivative Financial Instrume_3

Derivative Financial Instruments - Schedule of the Notional Amount and Fair Value of the Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Interest Rate Lock Commitments
Derivative [Line Items]
Notional Amount	$ 100,322	$ 102,881
Fair Value	2,704	4,947
Forward Commitments
Derivative [Line Items]
Notional Amount	102,778	158,759
Fair Value	748	(740)
Receive Fixed / Pay Variable Swap
Derivative [Line Items]
Notional Amount	1,370,386	1,362,778
Fair Value	24,416	90,130
Pay Fixed / Receive Variable Swap
Derivative [Line Items]
Notional Amount	1,370,386	1,362,778
Fair Value	(11,627)	(17,197)
Foreign Exchange Contracts
Derivative [Line Items]
Notional Amount	88,919	90,587
Fair Value	2,345	866
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Notional Amount	129,020	133,286
Fair Value	$ 0	$ 0

Derivative Financial Instrume_4

Derivative Financial Instruments - Derivative Financial Instruments, their Fair Values, and Balance Sheet Location (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Asset Derivatives	$ 46,977	$ 96,167
Liability Derivatives	32,002	18,161
Interest Rate Lock Commitments
Derivatives Fair Value [Line Items]
Asset Derivatives	2,704	4,947
Liability Derivatives	0	0
Forward Commitments
Derivatives Fair Value [Line Items]
Asset Derivatives	794	0
Liability Derivatives	46	740
Interest Rate Swap Agreements
Derivatives Fair Value [Line Items]
Asset Derivatives	42,339	90,342
Liability Derivatives	29,561	17,409
Foreign Exchange Contracts
Derivatives Fair Value [Line Items]
Asset Derivatives	1,140	878
Liability Derivatives	$ 2,395	$ 12

Derivative Financial Instrume_5

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	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	$ 5,875	$ 11,271
Interest Rate Lock Commitments | Mortgage Banking Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	773	6,303
Forward Commitments | Mortgage Banking Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	3,227	(2,184)
Interest Rate Swap Agreements | Other Noninterest Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	1,604	6,438
Foreign Exchange Contracts | Other Noninterest Income
Derivative Instruments Gain Loss [Line Items]
Net gains (losses) recognized in the statements of income	$ 271	$ 714

Derivative Financial Instrume_6

Derivative Financial Instruments - Additional Information (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Liability derivatives	$ 32,002,000	$ 18,161,000
Visa Class B Restricted Securities
Derivative [Line Items]
Liability derivatives	$ 0	$ 0

Commitments, Contingencies, a_3

Commitments, Contingencies, and Guarantees - Credit Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Credit Commitments [Line Items]
Credit Commitments	$ 2,951,110	$ 2,897,820
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	2,837,258	2,787,123
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	102,531	100,186
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	$ 11,321	$ 10,511

Commitments, Contingencies, a_4

Commitments, Contingencies, and Guarantees - Additional Information (Details) $ in Millions	Dec. 06, 2019USD ($)	Mar. 31, 2021USD ($)Loan	Dec. 31, 2020USD ($)
Residential Mortgage
Commitments Contingencies And Guarantees [Line Items]
Continuing involvement with transferred financial assets, principal amount outstanding		$ 2,400
Residential mortgage loans repurchased		$ 0.6
Number of mortgage loans repurchased, pending | Loan		0
Number of mortgage loans repurchased due to loan servicing activities | Loan		0
Number of mortgage loans repurchased due to loan servicing activities, pending | Loan		0
Current residential mortgage loans serviced for third parties as percentage of total		99.00%
Class Settlement | Settled Litigation
Commitments Contingencies And Guarantees [Line Items]
Litigation settlement amount	$ 8
Reserve relating to the claim			$ 8

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Available-for-Sale: Fair Value	$ 4,024,763	$ 3,791,689
Loans Held for Sale	18,320	82,565
Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	24,325	24,840
Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,035	1,062
Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	222,115	224,605
Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,585,345	1,594,815
Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,807,929	1,518,283
Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	218,792	253,839
Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,612,066	3,366,937
Fair Value, Measurements, Recurring
Assets:
Available-for-Sale: Fair Value	4,024,763	3,791,689
Loans Held for Sale	18,320	82,565
Mortgage Servicing Rights	919	658
Other Assets	54,612	53,410
Derivatives	46,977	96,167
Total Assets Measured at Fair Value on a Recurring Basis	4,145,591	4,024,489
Liabilities:
Derivatives	32,002	18,161
Total Liabilities Measured at Fair Value on a Recurring Basis	32,002	18,161
Fair Value, Measurements, Recurring | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	165,222	174,245
Fair Value, Measurements, Recurring | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	24,325	24,840
Fair Value, Measurements, Recurring | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,035	1,062
Fair Value, Measurements, Recurring | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	222,115	224,605
Fair Value, Measurements, Recurring | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,585,345	1,594,815
Fair Value, Measurements, Recurring | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,807,929	1,518,283
Fair Value, Measurements, Recurring | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	218,792	253,839
Fair Value, Measurements, Recurring | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,612,066	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	916	921
Loans Held for Sale	0	0
Mortgage Servicing Rights	0	0
Other Assets	54,612	53,410
Derivatives	0	0
Total Assets Measured at Fair Value on a Recurring Basis	55,528	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	916	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	4,023,847	3,790,768
Loans Held for Sale	18,320	82,565
Mortgage Servicing Rights	0	0
Other Assets	0	0
Derivatives	1,934	878
Total Assets Measured at Fair Value on a Recurring Basis	4,044,101	3,874,211
Liabilities:
Derivatives	2,441	752
Total Liabilities Measured at Fair Value on a Recurring Basis	2,441	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	164,306	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	24,325	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	1,035	1,062
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	222,115	224,605
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,585,345	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	1,807,929	1,518,283
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	218,792	253,839
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	3,612,066	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	919	658
Other Assets	0	0
Derivatives	45,043	95,289
Total Assets Measured at Fair Value on a Recurring Basis	45,962	95,947
Liabilities:
Derivatives	29,561	17,409
Total Liabilities Measured at Fair Value on a Recurring Basis	29,561	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 Liab_4

Fair Value of Assets and Liabilities - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Mortgage Servicing Rights Measured on Recurring Basis, Unobservable Input Reconciliation [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	(39)	(25)
Fair Value, Mortgage Servicing Rights, Ending Balance	919	1,101
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	874	6,172
Fair Value, Net Derivative Assets and Liabilities, Transfers to Loans Held for Sale	(3,016)	(3,653)
Variation margin payments for swap liabilities	(60,256)	55,588
Fair Value, Net Derivative Assets and Liabilities, Ending Balance	15,482	80,680
Fair Value, Net Derivative Assets and Liabilities,Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	$ 15,482	$ 80,680

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Summary of the Significant Unobservable Inputs (Details) - Significant Other Unobservable Inputs (Level 3) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
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	$ 12,778	$ 72,933
Discounted Cash Flow | Weighted Average Constant Prepayment Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0688	0.0581
Discounted Cash Flow | Weighted Average Credit Factor (as a percent) | 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	0.0015	0.0029
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	$ 22,320	$ 19,652
Discounted Cash Flow | Mortgage Servicing Rights | Weighted Average Constant Prepayment Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.1127	0.1442
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	$ 2,704	$ 4,947
Pricing Model | Weighted Average Closing Ratio (as a percent) | 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	0.9219	0.9076
Minimum | Discounted Cash Flow | Weighted Average Constant Prepayment Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0599	0.0569
Minimum | Discounted Cash Flow | Weighted Average Credit Factor (as a percent) | 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	0
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	8.67%	8.71%
Minimum | Pricing Model | Weighted Average Closing Ratio (as a percent) | 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	0.8410
Maximum | Discounted Cash Flow | Weighted Average Constant Prepayment Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0696	0.0628
Maximum | Discounted Cash Flow | Weighted Average Credit Factor (as a percent) | 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	0.0049
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	12.98%	15.89%
Maximum | Pricing Model | Weighted Average Closing Ratio (as a percent) | 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	0.9900	0.9900

Fair Value of Assets and Liab_6

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	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Carrying Amount	$ 21,401	$ 18,694
Valuation Allowance	$ (1,702)	$ (3,892)

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities - Additional Information (Details) - Significant Other Unobservable Inputs (Level 3) $ in Millions	Dec. 31, 2020USD ($)branch
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	$ 7
Number of branches closed | branch	12
Net Occupancy Expense
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	$ 3.6
Interest and Fees on Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	3
Net Equipment Expense
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	$ 0.4

Fair Value of Assets and Liab_8

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	Mar. 31, 2021	Dec. 31, 2020
Fair Value Option Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 18,320	$ 82,565
Aggregate Unpaid Principal	18,003	78,577
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 317	$ 3,988

Fair Value of Assets and Liab_9

Fair Value of Assets and Liabilities - Schedule of Carrying Amount, Fair Value, and Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial Instruments - Assets
Held-to-Maturity: Fair Value	$ 3,477,346	$ 3,348,693
Carrying Amount
Financial Instruments - Assets
Held-to-Maturity: Fair Value	3,464,360	3,262,727
Loans	11,758,861	11,536,011
Financial Instruments - Liabilities
Time Deposits	1,475,392	1,662,063
Securities Sold Under Agreements to Repurchase	600,490	600,590
Other Debt	50,000	50,000
Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	3,477,346	3,348,693
Loans	12,058,054	12,019,151
Financial Instruments - Liabilities
Time Deposits	1,478,713	1,667,774
Securities Sold Under Agreements to Repurchase	637,399	649,039
Other Debt	51,019	51,546
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	7,333	7,500
Loans	0	0
Financial Instruments - Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	0	0
Other Debt	0	0
Significant Other Observable Inputs (Level 2) | Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	3,470,011	3,341,193
Loans	0	0
Financial Instruments - Liabilities
Time Deposits	1,478,713	1,667,774
Securities Sold Under Agreements to Repurchase	637,399	649,039
Other Debt	51,019	51,546
Significant Other Unobservable Inputs (Level 3) | Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	0	0
Loans	12,058,054	12,019,151
Financial Instruments - Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	0	0
Other Debt	$ 0	$ 0