Bank of Hawaii (BOH) 10-Q 30 Oct 20 2020 Q3 Quarterly report Financial data

Cover page

Cover page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 22, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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		40,060,895
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest Income
Interest and Fees on Loans and Leases	$ 103,189	$ 110,877	$ 319,027	$ 329,789
Income on Investment Securities
Available-for-Sale	14,558	17,512	45,845	46,016
Held-to-Maturity	15,967	18,796	51,942	62,866
Deposits	3	9	13	33
Funds Sold	149	656	787	2,830
Other	151	233	494	762
Total Interest Income	134,017	148,083	418,108	442,296
Interest Expense
Deposits	5,891	18,055	28,105	51,967
Securities Sold Under Agreements to Repurchase	3,622	4,257	11,667	13,451
Funds Purchased		146	90	815
Short-Term Borrowings	1	1	62	38
Other Debt	337	728	1,361	2,195
Total Interest Expense	9,851	23,187	41,285	68,466
Net Interest Income	124,166	124,896	376,823	373,830
Provision for Credit Losses	28,600	4,250	102,600	11,250
Net Interest Income After Provision for Credit Losses	95,566	120,646	274,223	362,580
Noninterest Income
Trust and Asset Management	10,752	10,930	32,217	33,076
Mortgage Banking	4,047	4,864	11,020	10,487
Service Charges on Deposit Accounts	6,027	7,592	18,575	22,239
Fees, Exchange, and Other Service Charges	12,296	14,900	34,913	43,360
Investment Securities Gains (Losses), Net	(1,121)	(1,469)	11,125	(3,080)
Annuity and Insurance	881	1,278	2,692	5,662
Bank-Owned Life Insurance	1,806	1,647	5,035	5,136
Other	7,046	6,765	23,574	18,756
Total Noninterest Income	41,734	46,507	139,151	135,636
Noninterest Expense
Salaries and Benefits	51,951	54,345	157,129	164,442
Net Occupancy	7,281	8,803	24,997	24,976
Net Equipment	9,223	7,637	25,874	21,365
Data Processing	4,691	4,676	13,895	13,929
Professional Fees	2,743	2,184	9,012	6,814
FDIC Insurance	1,282	1,257	4,296	3,816
Other	12,778	21,447	39,950	50,789
Total Noninterest Expense	89,949	100,349	275,153	286,131
Income Before Provision for Income Taxes	47,351	66,804	138,221	212,085
Provision for Income Taxes	9,511	14,752	26,731	44,315
Net Income	$ 37,840	$ 52,052	$ 111,490	$ 167,770
Basic Earnings Per Share (in dollars per share)	$ 0.95	$ 1.30	$ 2.81	$ 4.14
Diluted Earnings Per Share (in dollars per share)	0.95	1.29	2.80	4.11
Dividends Declared Per Share (in dollars per share)	$ 0.67	$ 0.65	$ 2.01	$ 1.92
Basic Weighted Average Shares (in shares)	39,745,120	40,190,508	39,710,252	40,554,036
Diluted Weighted Average Shares (in shares)	39,869,135	40,450,742	39,872,406	40,806,295

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 37,840	$ 52,052	$ 111,490	$ 167,770
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) on Investment Securities	(4,900)	5,405	44,389	28,533
Defined Benefit Plans	374	245	1,122	736
Total Other Comprehensive Income (Loss)	(4,526)	5,650	45,511	29,269
Comprehensive Income	$ 33,314	$ 57,702	$ 157,001	$ 197,039

Consolidated Statements of Cond

Consolidated Statements of Condition (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Interest-Bearing Deposits in Other Banks	$ 4,233	$ 4,979
Funds Sold	736,524	254,574
Investment Securities
Available-for-Sale	3,190,313	2,619,003
Held-to-Maturity (Fair Value of $3,288,668 and $3,062,882)	3,198,830	3,042,294
Loans Held for Sale		39,062
Loans and Leases	11,793,608	10,990,892
Allowance for Credit Losses	(203,496)	(110,027)
Net Loans and Leases	11,590,112	10,880,865
Total Earning Assets	18,720,012	16,840,777
Cash and Due From Banks	260,167	299,105
Premises and Equipment, Net	199,021	188,388
Operating Lease Right-of-Use Assets	96,200	100,838
Accrued Interest Receivable	57,370	46,476
Foreclosed Real Estate	2,332	2,737
Mortgage Servicing Rights	21,887	25,022
Goodwill	31,517	31,517
Bank-Owned Life Insurance	291,231	287,962
Other Assets	429,752	272,674
Total Assets	20,109,489	18,095,496
Deposits
Noninterest-Bearing Demand	5,428,567	4,489,525
Interest-Bearing Demand	3,824,448	3,127,205
Savings	6,763,891	6,365,321
Time	1,721,977	1,802,431
Total Deposits	17,738,883	15,784,482
Securities Sold Under Agreements to Repurchase	602,106	604,306
Other Debt	60,502	85,565
Operating Lease Liabilities	103,869	108,210
Retirement Benefits Payable	43,505	44,504
Accrued Interest Payable	6,613	8,040
Taxes Payable and Deferred Taxes	12,124	16,085
Other Liabilities	180,148	157,472
Total Liabilities	18,747,750	16,808,664
Shareholders’ Equity
Common Stock ($.01 par value; authorized 500,000,000 shares; issued / outstanding: September 30, 2020 - 58,248,690 /40,060,675 and December 31, 2019 - 58,166,910 / 40,039,695)	580	579
Capital Surplus	588,632	582,566
Accumulated Other Comprehensive Income (Loss)	14,399	(31,112)
Retained Earnings	1,797,763	1,761,415
Treasury Stock, at Cost (Shares; September 30, 2020 - 18,188,015 and December 31, 2019 - 18,127,215)	(1,039,635)	(1,026,616)
Total Shareholders’ Equity	1,361,739	1,286,832
Total Liabilities and Shareholders’ Equity	$ 20,109,489	$ 18,095,496

Consolidated Statements of Co_2

Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Held-to-Maturity: Fair Value	$ 3,288,668	$ 3,062,882
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)	58,248,690	58,166,910
Common Stock, outstanding (in shares)	40,060,675	40,039,695
Treasury Stock (in shares)	18,188,015	18,127,215

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, 2018	$ 1,268,200		$ 577	$ 571,704	$ (51,043)	$ 1,641,314		$ (894,352)
Beginning Balance (in shares) at Dec. 31, 2018			41,499,898
Increase (decrease) in shareholders' equity
Net Income	58,799					58,799
Other Comprehensive Income	7,165				7,165
Share-Based Compensation	2,274			2,274
Common Stock Issued under Purchase and Equity Compensation Plans	2,087		$ 1	616		(203)		1,673
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			131,529
Common Stock Repurchased	(43,189)							(43,189)
Common Stock Repurchased (in shares)			(552,739)
Cash Dividends Declared (per share)	(25,646)					(25,646)
Balance at End of Period at Mar. 31, 2019	1,269,690		$ 578	574,594	(43,878)	1,674,264		(935,868)
Ending Balance (in shares) at Mar. 31, 2019			41,078,688
Balance at Beginning of Period at Dec. 31, 2018	1,268,200		$ 577	571,704	(51,043)	1,641,314		(894,352)
Beginning Balance (in shares) at Dec. 31, 2018			41,499,898
Increase (decrease) in shareholders' equity
Net Income	167,770
Other Comprehensive Income	29,269				29,269
Balance at End of Period at Sep. 30, 2019	1,291,490		$ 579	580,200	(21,774)	1,730,437		(997,952)
Ending Balance (in shares) at Sep. 30, 2019			40,359,259
Balance at Beginning of Period at Mar. 31, 2019	1,269,690		$ 578	574,594	(43,878)	1,674,264		(935,868)
Beginning Balance (in shares) at Mar. 31, 2019			41,078,688
Increase (decrease) in shareholders' equity
Net Income	56,919					56,919
Other Comprehensive Income	16,454				16,454
Share-Based Compensation	2,164			2,164
Common Stock Issued under Purchase and Equity Compensation Plans	2,262		$ 1	588		365		1,308
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			43,180
Common Stock Repurchased	(34,986)							(34,986)
Common Stock Repurchased (in shares)			(434,149)
Cash Dividends Declared (per share)	(26,555)					(26,555)
Balance at End of Period at Jun. 30, 2019	1,285,948		$ 579	577,346	(27,424)	1,704,993		(969,546)
Ending Balance (in shares) at Jun. 30, 2019			40,687,719
Increase (decrease) in shareholders' equity
Net Income	52,052					52,052
Other Comprehensive Income	5,650				5,650
Share-Based Compensation	2,224			2,224
Common Stock Issued under Purchase and Equity Compensation Plans	1,653			630		(271)		1,294
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			26,275
Common Stock Repurchased	(29,700)							(29,700)
Common Stock Repurchased (in shares)			(354,735)
Cash Dividends Declared (per share)	(26,337)					(26,337)
Balance at End of Period at Sep. 30, 2019	1,291,490		$ 579	580,200	(21,774)	1,730,437		(997,952)
Ending Balance (in shares) at Sep. 30, 2019			40,359,259
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		40,039,695
Increase (decrease) in shareholders' equity
Net Income	$ 34,742					34,742
Other Comprehensive Income	$ 41,933				41,933
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
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, 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		40,039,695
Increase (decrease) in shareholders' equity
Net Income	$ 111,490
Other Comprehensive Income	45,511				45,511
Balance at End of Period at Sep. 30, 2020	$ 1,361,739		$ 580	588,632	14,399	1,797,763		(1,039,635)
Ending Balance (in shares) at Sep. 30, 2020	40,060,675		40,060,675
Balance at Beginning of Period at Mar. 31, 2020	$ 1,327,929		$ 579	584,392	10,821	1,773,607		(1,041,470)
Beginning Balance (in shares) at Mar. 31, 2020			39,996,510
Increase (decrease) in shareholders' equity
Net Income	38,908					38,908
Other Comprehensive Income	8,104				8,104
Share-Based Compensation	2,207			2,207
Common Stock Issued under Purchase and Equity Compensation Plans	1,926		$ 1	347		680		898
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			53,672
Common Stock Repurchased	(148)							(148)
Common Stock Repurchased (in shares)			(2,488)
Cash Dividends Declared (per share)	(26,844)					(26,844)
Balance at End of Period at Jun. 30, 2020	1,352,082		$ 580	586,946	18,925	1,786,351		(1,040,720)
Ending Balance (in shares) at Jun. 30, 2020			40,047,694
Increase (decrease) in shareholders' equity
Net Income	37,840					37,840
Other Comprehensive Income	(4,526)				(4,526)
Share-Based Compensation	1,643			1,643
Common Stock Issued under Purchase and Equity Compensation Plans	1,673			43		429		1,201
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)			14,919
Common Stock Repurchased	(116)							(116)
Common Stock Repurchased (in shares)			(1,938)
Cash Dividends Declared (per share)	(26,857)					(26,857)
Balance at End of Period at Sep. 30, 2020	$ 1,361,739		$ 580	$ 588,632	$ 14,399	$ 1,797,763		$ (1,039,635)
Ending Balance (in shares) at Sep. 30, 2020	40,060,675		40,060,675

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Stockholders Equity [Abstract]
Dividends Declared Per Share (in dollars per share)	$ 0.67	$ 0.67	$ 0.67	$ 0.65	$ 0.65	$ 0.62	$ 2.01	$ 1.92

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net Income	$ 111,490	$ 167,770
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	102,600	11,250
Depreciation and Amortization	14,929	12,685
Amortization of Deferred Loan and Lease Fees	(1,640)	(85)
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	19,043	15,102
Amortization of Operating Lease Right-of-Use Assets	9,192	9,495
Share-Based Compensation	5,347	6,662
Benefit Plan Contributions	(1,071)	(1,472)
Deferred Income Taxes	(31,725)	(5,805)
Gains on Sale of Premises and Equipment	(1,850)	(558)
Net Gains on Sales of Loans and Leases	(9,779)	(3,705)
Net Losses (Gains) on Sales of Investment Securities	(11,125)	3,080
Proceeds from Sales of Loans Held for Sale	333,770	299,062
Originations of Loans Held for Sale	(316,203)	(322,721)
Net Tax Benefits from Share-Based Compensation	469	693
Net Change in Other Assets and Other Liabilities	(135,753)	(38,710)
Net Cash Provided by Operating Activities	87,694	152,743
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities	733,619	1,656,241
Purchases	(1,238,926)	(1,203,633)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	1,000,743	518,822
Purchases	(1,170,928)	(1,006,455)
Net Change in Loans and Leases	(782,613)	(441,007)
Purchases of Premises and Equipment	(25,693)	(40,381)
Proceeds from Sale of Premises and Equipment	1,981	639
Net Cash Used in Investing Activities	(1,481,817)	(515,774)
Financing Activities
Net Change in Deposits	1,954,401	313,510
Net Change in Short-Term Borrowings	(2,200)	99,804
Proceeds from Long-Term Debt	50,000	0
Repayments of Long-Term Debt	(75,063)	(25,058)
Proceeds from Issuance of Common Stock	7,684	6,103
Repurchase of Common Stock	(17,897)	(107,875)
Cash Dividends Paid	(80,536)	(78,538)
Net Cash Provided by Financing Activities	1,836,389	207,946
Net Change in Cash and Cash Equivalents	442,266	(155,085)
Cash and Cash Equivalents at Beginning of Period	558,658	525,969
Cash and Cash Equivalents at End of Period	1,000,924	370,884
Supplemental Information
Cash Paid for Interest	42,712	68,284
Cash Paid for Income Taxes	46,949	43,905
Non-Cash Investing and Financing Activities:
Initial Recognition of Operating Lease Right-of-Use Assets	0	106,514
Initial Recognition of Operating Lease Liabilities	0	113,394
Transfer from Investment Securities Held-To-Maturity to Investment Securities Available-For-Sale	0	1,014,859
Transfer from Loans to Foreclosed Real Estate	$ 0	$ 2,070

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
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 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, 2019. 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. Prior to January 1, 2015, the Company utilized the effective yield method whereby the Company recognized tax credits generally over 10 years and amortized the initial cost of the investment to provide a constant effective yield over the period that tax credits are allocated to the Company. On January 1, 2015, the Company adopted ASU No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” Unfunded commitments to fund these low-income housing entities were $39.0 million and $21.3 million as of September 30, 2020, and December 31, 2019, 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 $123.6 million and $84.6 million as of September 30, 2020, and December 31, 2019, respectively, and is included in other assets in the consolidated statements of condition. Allowance for Credit Losses - Loans and Leases The current expected credit loss (“CECL”) approach requires an estimate of the credit losses expected over the life of an exposure (or pool of exposures). It replaces the incurred loss approach’s threshold that delayed the recognition of a credit loss until it was probable a loss event was incurred. The estimate of expected credit losses is based on relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amounts. Historical loss experience is generally the starting point for estimating expected credit losses. The Company then considers whether the historical loss experience should be adjusted for asset-specific risk characteristics or current conditions at the reporting date that did not exist over the historical period used. The Company 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 (“ACL”). 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 ACL 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 one-year reasonable and supportable (“R&S”) loss forecast period 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 overlay to the quantitative baseline. After the one-year R&S loss forecast period, this overlay 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 ACL 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. After determining the ACL quantitative baseline, 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 overlay 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, following the one-year R&S loss forecast period, the Company chose an immediate reversion back to average historical loss rates. The reversion method was due to the impact of COVID-19 which created a much more volatile and uncertain economic outlook. The Company is forecasting that losses during the R&S loss forecast period will be impacted by the unprecedented fiscal, monetary and regulatory programs to support the economy, as well as the assistance the Company is providing to borrowers through its various credit assistance programs. Given this forecast and the uncertainty of the impact of COVID-19 after the one-year R&S loss forecast period, the Company determined that an immediate reversion was appropriate for this measurement date. 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 September 30, 2020, 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 September 30, 2020, 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 September 30, 2020, 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 Upon adoption of ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments” • Presenting accrued interest receivable balances separately within another consolidated statements of condition line item. • Excluding accrued interest receivable that is included in the amortized cost of financing receivables from related disclosure requirements. • Continuing our policy to write off accrued interest receivable 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 accrued interest receivable on its investment securities. However, the Company would generally write off accrued interest receivable by reversing interest income if the Company does not reasonably expect to receive payments. Due to the timely manner in which accrued interest receivables are written off, the amounts of such write offs are immaterial. • Not measuring an allowance for credit losses for accrued interest receivable due to the Company’s policy of writing off uncollectible accrued interest receivable balances 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 accrued interest receivable balances as any amounts that may become uncollectible may not be considered written off in a timely manner. As of September 30, 2020, the Company determined that the expected credit loss on these accrued interest receivable balances were not material, and therefore, an allowance for credit losses was not recorded. See the Operating, Accounting and Reporting Considerations related to COVID-19 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 reserve for unfunded commitments (the “Unfunded Reserve”) represents the expected credit losses on off-balance sheet commitments such as unfunded commitments to extend credit and standby letters of credit. However, a liability is not recognized for commitments unconditionally cancellable by the Company. The Unfunded Reserve is recognized as a liability (other liabilities in the consolidated statements of condition), with adjustments to the reserve recognized in other noninterest expense 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 provides an estimated $2.2 trillion 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 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. Loans and Leases and the Allowance for Credit Losses • Paycheck Protection Program Loans and Leases and the Allowance for Credit Losses • Mortgage Forbearance Under the CARES Act, through the earlier of December 31, 2020, or the termination date of the COVID-19 national emergency, a borrower with a federally backed mortgage loan that is experiencing financial hardship due to COVID-19 may request a forbearance. A multifamily borrower with a federally backed multifamily mortgage loan that was current as of February 1, 2020, and is experiencing financial hardship due to COVID-19 may request forbearance on the loan for up to 30 days, with up to two additional 30-day periods at the borrower’s request. 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 Loans and Leases and the Allowance for Credit Losses • Past Due Reporting • Nonaccrual Status and Charge-offs The Company began offering 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. 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 continues to negatively impact the economy, the Company began offering an additional round of loan modifications to borrowers continuing to struggle 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 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. 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 consists 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 September 30, 2020, the Company has not offered a material amount of additional concessions. The Company, as lessor, leases and subleases real property to lessee tenants under operating leases. As of September 30, 2020, 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 2020 In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” The Company adopted the standard on January 1, 2020, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings, as of January 1, 2020 (i.e., modified retrospective approach). Upon adoption of the standard, the Company recorded a $5.1 million decrease to the reserve for credit losses, which resulted in a $3.6 million after-tax increase to retained earnings as of January 1, 2020. The tax effect resulted in an increase to deferred tax liabilities. This “Day 1” impact of CECL adoption is summarized below: (dollars in thousands) December 31, 2019 CECL Adoption Impact January 1, 2020 Allowance for Credit Losses: Commercial $ 73,801 $ (18,789 ) $ 55,012 Consumer 36,226 17,052 53,278 Total Allowance for Credit Losses 110,027 (1,737 ) 108,290 Reserve for Unfunded Commitments 6,822 (3,335 ) 3,487 Total Reserve for Credit Losses $ 116,849 $ (5,072 ) $ 111,777 Retained Earnings Total Pre-tax Impact $ 5,072 Tax Effect (1,440 ) Increase to Retained Earnings $ 3,632 The Company did not record an allowance for AFS or HTM securities on Day 1 as the investment portfolio consists primarily of debt securities explicitly or implicitly backed by the U.S. Government for which credit risk is deemed minimal. The impact going forward will depend on the composition, characteristics, and credit quality of the loan and securities portfolios as well as the economic conditions at future reporting periods. See Note 3 Investment Securities Loans and Leases and the Allowance for Credit Losses In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments.” With respect to Topic 326, ASU 2019-04 clarifies the scope of the credit losses standard and addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. The Company made the accounting policy elections not to measure an allowance for credit losses on accrued interest receivable, to write-off accrued interest amounts by reversing interest income, and to present accrued interest receivable separately from the related financial asset on the statements of financial condition. The amendments to Topic 326 were adopted concurrently with ASU 2016-13 on January 1, 2020. The financial statement impact in regards to the amendments to Topic 326 are incorporated within ASU 2016-13 mentioned above. With respect to Topic 825, on recognizing and measuring financial instruments, ASU 2019-04 addresses the scope of the guidance, the requirement for remeasurement under ASC 820 when using the measurement alternative, certain disclosure requirements and which equity securities have to be remeasured at historical exchange rates. The amendments to Topic 825 were effective for interim and annual reporting periods beginning after December 15, 2019, and did not have a material impact on the Company’s Consolidated Financial Statements. The Company elected to early adopt the amendments to Topic 815 in June 2019. See Note 1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, for more information. In May 2019, the FASB issued ASU No. 2019-05, “Financial Instruments - Credit Losses

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2020
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) September 30, 2020 December 31, 2019 Interest-Bearing Deposits in Other Banks $ 4,233 $ 4,979 Funds Sold 736,524 254,574 Cash and Due From Banks 260,167 299,105 Total Cash and Cash Equivalents $ 1,000,924 $ 558,658

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019, were as follows: (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2020 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 182,605 $ 245 $ (1,405 ) $ 181,445 Debt Securities Issued by States and Political Subdivisions 45,313 1,491 (1 ) 46,803 Debt Securities Issued by U.S. Government-Sponsored Enterprises 937 79 — 1,016 Debt Securities Issued by Corporations 221,935 4,273 (1,754 ) 224,454 Mortgage-Backed Securities: Residential - Government Agencies 1,483,465 37,344 (307 ) 1,520,502 Residential - U.S. Government-Sponsored Enterprises 917,366 19,904 (202 ) 937,068 Commercial - Government Agencies 267,225 11,863 (63 ) 279,025 Total Mortgage-Backed Securities 2,668,056 69,111 (572 ) 2,736,595 Total $ 3,118,846 $ 75,199 $ (3,732 ) $ 3,190,313 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 62,505 $ 211 $ (2 ) $ 62,714 Debt Securities Issued by States and Political Subdivisions 54,001 1,022 — 55,023 Debt Securities Issued by Corporations 12,770 279 — 13,049 Mortgage-Backed Securities: Residential - Government Agencies 792,360 33,324 (19 ) 825,665 Residential - U.S. Government-Sponsored Enterprises 2,184,472 52,270 (121 ) 2,236,621 Commercial - Government Agencies 92,722 2,967 (93 ) 95,596 Total Mortgage-Backed Securities 3,069,554 88,561 (233 ) 3,157,882 Total $ 3,198,830 $ 90,073 $ (235 ) $ 3,288,668 December 31, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 222,365 $ 213 $ (1,447 ) $ 221,131 Debt Securities Issued by States and Political Subdivisions 54,480 631 (14 ) 55,097 Debt Securities Issued by U.S. Government-Sponsored Enterprises 22,128 19 — 22,147 Debt Securities Issued by Corporations 335,553 1,401 (633 ) 336,321 Mortgage-Backed Securities: Residential - Government Agencies 1,164,466 11,627 (3,267 ) 1,172,826 Residential - U.S. Government-Sponsored Enterprises 584,272 4,363 (1,874 ) 586,761 Commercial - Government Agencies 224,372 2,889 (2,541 ) 224,720 Total Mortgage-Backed Securities 1,973,110 18,879 (7,682 ) 1,984,307 Total $ 2,607,636 $ 21,143 $ (9,776 ) $ 2,619,003 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 274,375 $ 1,319 $ (31 ) $ 275,663 Debt Securities Issued by States and Political Subdivisions 54,811 1,236 — 56,047 Debt Securities Issued by Corporations 14,975 — (138 ) 14,837 Mortgage-Backed Securities: Residential - Government Agencies 1,067,416 13,247 (5,348 ) 1,075,315 Residential - U.S. Government-Sponsored Enterprises 1,546,479 13,871 (2,478 ) 1,557,872 Commercial - Government Agencies 84,238 317 (1,407 ) 83,148 Total Mortgage-Backed Securities 2,698,133 27,435 (9,233 ) 2,716,335 Total $ 3,042,294 $ 29,990 $ (9,402 ) $ 3,062,882 The Company elected to exclude accrued interest receivable (“AIR”) from the amortized cost basis of debt securities disclosed throughout this footnote. For available-for-sale (“AFS”) debt securities, AIR totaled $6.4 million and $7.5 million as of September 30, 2020, and December 31, 2019, respectively. For held-to-maturity (“HTM”) debt securities, AIR totaled $8.2 million and $8.1 million as of September 30, 2020, and December 31, 2019, 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 September 30, 2020. 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 $ 61,913 $ 61,802 Due After One Year Through Five Years 59,080 60,281 Due After Five Years Through Ten Years 148,282 151,301 Due After Ten Years — — 269,275 273,384 Debt Securities Issued by Government Agencies 181,515 180,334 Mortgage-Backed Securities: Residential - Government Agencies 1,483,465 1,520,502 Residential - U.S. Government-Sponsored Enterprises 917,366 937,068 Commercial - Government Agencies 267,225 279,025 Total Mortgage-Backed Securities 2,668,056 2,736,595 Total $ 3,118,846 $ 3,190,313 Held-to-Maturity: Due in One Year or Less 80,075 80,356 Due After One Year Through Five Years 49,201 50,430 129,276 130,786 Mortgage-Backed Securities: Residential - Government Agencies 792,360 825,665 Residential - U.S. Government-Sponsored Enterprises 2,184,472 2,236,621 Commercial - Government Agencies 92,722 95,596 Total Mortgage-Backed Securities 3,069,554 3,157,882 Total $ 3,198,830 $ 3,288,668 Investment securities with carrying values of $3.8 billion and $2.6 billion as of September 30, 2020, and December 31, 2019, 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 and nine months ended September 30, 2020, and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Gross Gains on Sales of Investment Securities $ — $ 38 $ 14,257 $ 7,701 Gross Losses on Sales of Investment Securities (1,121 ) (1,507 ) (3,132 ) (10,781 ) Net Gains (Losses) on Sales of Investment Securities $ (1,121 ) $ (1,469 ) $ 11,125 $ (3,080 ) The losses on sales of investment securities during the three and nine months ended September 30, 2020, and September 30, 2019, were due to fees paid to the counterparties of the Company’s prior Visa Class B share sale transactions, which are expensed as incurred. In addition, the gross gains and losses on sales of investment securities during the three and nine months ended September 30, 2019, included sales of municipal debt securities, mortgage-backed securities, and corporate debt securities as part of a portfolio repositioning. 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 September 30, 2020 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 134,162 $ (1,363 ) $ 24,886 $ (42 ) $ 159,048 $ (1,405 ) Debt Securities Issued by States and Political Subdivisions 26 (1 ) 60 — 86 (1 ) Debt Securities Issued by Corporations 75,000 (642 ) 65,000 (1,112 ) 140,000 (1,754 ) Mortgage-Backed Securities: Residential - Government Agencies 30,216 (223 ) 136,396 (84 ) 166,612 (307 ) Residential - U.S. Government-Sponsored Enterprises — — 95,943 (202 ) 95,943 (202 ) Commercial-Government Agencies — — 25,188 (63 ) 25,188 (63 ) Total Mortgage-Backed Securities 30,216 (223 ) 257,527 (349 ) 287,743 (572 ) Total $ 239,404 $ (2,229 ) $ 347,473 $ (1,503 ) $ 586,877 $ (3,732 ) December 31, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 65,479 $ (188 ) $ 101,761 $ (1,259 ) $ 167,240 $ (1,447 ) Debt Securities Issued by States and Political Subdivisions 6,788 (14 ) 440 — 7,228 (14 ) Debt Securities Issued by Corporations 25,892 (326 ) 74,693 (307 ) 100,585 (633 ) Mortgage-Backed Securities: Residential - Government Agencies 119,271 (526 ) 170,805 (2,741 ) 290,076 (3,267 ) Residential - U.S. Government-Sponsored Enterprises 187,861 (816 ) 73,720 (1,058 ) 261,581 (1,874 ) Commercial - Government Agencies 59,826 (319 ) 52,965 (2,222 ) 112,791 (2,541 ) Total Mortgage-Backed Securities 366,958 (1,661 ) 297,490 (6,021 ) 664,448 (7,682 ) Total $ 465,117 $ (2,189 ) $ 474,384 $ (7,587 ) $ 939,501 $ (9,776 ) The Company does not believe that the AFS debt securities that were in an unrealized loss position as of September 30, 2020, which were comprised of 84 individual securities, represent a credit loss impairment. The gross unrealized losses in the Company’s corporate bond portfolio were related to debt securities issued by large multinational banks. The unrealized losses primarily resulted from an increase in credit spreads due to the economic uncertainty related to COVID-19. However, as of September 30, 2020, such credit spreads have tightened significantly from their widest levels experienced in the first quarter of 2020. In addition, such banks have built up substantial capital buffers since the financial crisis of 2008 which mitigates the likelihood of credit losses. As of September 30, 2020, there have been no payment defaults nor do we currently expect any future payment defaults. Furthermore, the Company does not intend to sell these securities, 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. The remainder of the AFS debt securities in an unrealized loss position as of September 30, 2020, consisted of debt securities issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Total gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. The Company 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 September 30, 2020. The Company also carries a limited portfolio of HTM municipal bonds. As of September 30, 2020 , the entire portfolio consisted of State of Hawaii bonds carrying a Moody’s rating of Aa 2 , 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 September 30, 2020 . Interest income from taxable and non-taxable investment securities for the three and nine months ended September 30, 2020, and September 30, 2019, were as follows: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Taxable $ 30,027 $ 35,584 $ 96,150 $ 102,912 Non-Taxable 498 724 1,637 5,970 Total Interest Income from Investment Securities $ 30,525 $ 36,308 $ 97,787 $ 108,882 As of September 30, 2020, and December 31, 2019, 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) September 30, 2020 December 31, 2019 Federal Home Loan Bank Stock $ 15,174 $ 13,000 Federal Reserve Bank Stock 18,123 21,093 Total $ 33,297 $ 34,093 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 September 30, 2020, the conversion ratio was 1.6228. See Note 12 Derivative Financial Instruments The Company occasionally sells these Visa Class B shares to other financial institutions. During the second quarter of 2020, the Company recorded a $14.2 million gain on sale of its remaining 80,214 Visa Class B Shares. 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019: (dollars in thousands) September 30, 2020 December 31, 2019 Commercial Commercial and Industrial $ 1,908,482 $ 1,379,152 Commercial Mortgage 2,745,611 2,518,051 Construction 250,943 194,170 Lease Financing 111,831 122,454 Total Commercial 5,016,867 4,213,827 Consumer Residential Mortgage 4,044,228 3,891,100 Home Equity 1,605,486 1,676,073 Automobile 709,937 720,286 Other 1 417,090 489,606 Total Consumer 6,776,741 6,777,065 Total Loans and Leases $ 11,793,608 $ 10,990,892 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 $3.4 million and $2.5 million for the three months ended September 30, 2020, and September 30, 2019, respectively, and $9.0 million and $4.1 million for the nine months ended September 30, 2020, and September 30, 2019, respectively. The Company elected to exclude AIR from the amortized cost basis of loans disclosed throughout this footnote. As of September 30, 2020, and December 31, 2019, accrued interest receivable for loans totaled $42.7 million and $30.7 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”) As previously mentioned in Note 1 Summary of Significant Accounting Policies “Measurement of Credit Losses on Financial Instruments,” The following presents by portfolio segment, the activity in the Allowance for the three and nine months ended September 30, 2020, and September 30, 2019. (dollars in thousands) Commercial Consumer Total Three Months Ended September 30, 2020 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 72,522 $ 100,917 $ 173,439 Loans and Leases Charged-Off (171 ) (2,176 ) (2,347 ) Recoveries on Loans and Leases Previously Charged-Off 231 3,573 3,804 Net Loans and Leases Recovered (Charged-Off) 60 1,397 1,457 Provision for Credit Losses 7,685 20,915 28,600 Balance at End of Period $ 80,267 $ 123,229 $ 203,496 Nine Months Ended September 30, 2020 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2019) $ 73,801 $ 36,226 $ 110,027 CECL Adoption (Day 1) Impact (18,789 ) 17,052 (1,737 ) Balance at Beginning of Period (January 1, 2020) 55,012 53,278 108,290 Loans and Leases Charged-Off (1,520 ) (16,287 ) (17,807 ) Recoveries on Loans and Leases Previously Charged-Off 2,084 8,329 10,413 Net Loans and Leases Recovered (Charged-Off) 564 (7,958 ) (7,394 ) Provision for Credit Losses 24,691 77,909 102,600 Balance at End of Period $ 80,267 $ 123,229 $ 203,496 Three Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 69,268 $ 38,404 $ 107,672 Loans and Leases Charged-Off (239 ) (5,516 ) (5,755 ) Recoveries on Loans and Leases Previously Charged-Off 318 2,451 2,769 Net Loans and Leases Recovered (Charged-Off) 79 (3,065 ) (2,986 ) Provision for Credit Losses 1,023 3,227 4,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 Nine Months Ended September 30, 2019 Allowance for Credit Losses: Balance at Beginning of Period $ 66,874 $ 39,819 $ 106,693 Loans and Leases Charged-Off (2,431 ) (15,281 ) (17,712 ) Recoveries on Loans and Leases Previously Charged-Off 1,220 7,485 8,705 Net Loans and Leases Recovered (Charged-Off) (1,211 ) (7,796 ) (9,007 ) Provision for Credit Losses 4,707 6,543 11,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 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 September 30, 2020 . Term Loans by Origination Year (dollars in thousands) YTD September 30, 2020 2019 2018 2017 2016 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans and Leases September 30, 2020 Commercial Commercial and Industrial Pass $ 858,458 $ 171,894 $ 184,256 $ 73,712 $ 62,461 $ 86,296 $ 364,123 $ 977 $ 1,802,177 Special Mention 9,201 510 2,155 162 2,001 147 20,397 - 34,573 Classified 24,114 807 906 938 1,593 20,049 23,187 138 71,732 Total Commercial and Industrial $ 891,773 $ 173,211 $ 187,317 $ 74,812 $ 66,055 $ 106,492 $ 407,707 $ 1,115 $ 1,908,482 Commercial Mortgage Pass $ 588,510 $ 521,907 $ 377,630 $ 270,617 $ 290,575 $ 487,821 $ 74,547 $ - $ 2,611,607 Special Mention 5,621 24,850 19,416 15,463 1,252 5,432 - - 72,034 Classified 41,454 659 4,884 276 4,791 9,906 - - 61,970 Total Commercial Mortgage $ 635,585 $ 547,416 $ 401,930 $ 286,356 $ 296,618 $ 503,159 $ 74,547 $ - $ 2,745,611 Construction Pass $ 89,712 $ 117,759 $ 14,221 $ 11,450 $ - $ - $ 17,801 $ - $ 250,943 Total Construction $ 89,712 $ 117,759 $ 14,221 $ 11,450 $ - $ - $ 17,801 $ - $ 250,943 Lease Financing Pass $ 13,214 $ 21,089 $ 14,549 $ 4,783 $ 10,509 $ 46,291 $ - $ - $ 110,435 Classified 34 71 1,131 48 112 - - - 1,396 Total Lease Financing $ 13,248 $ 21,160 $ 15,680 $ 4,831 $ 10,621 $ 46,291 $ - $ - $ 111,831 Total Commercial $ 1,630,318 $ 859,546 $ 619,148 $ 377,449 $ 373,294 $ 655,942 $ 500,055 $ 1,115 $ 5,016,867 Consumer Residential Mortgage Pass $ 894,542 $ 629,503 $ 345,194 $ 516,410 $ 601,481 $ 1,052,843 $ - $ - $ 4,039,973 Classified - - - 928 - 3,327 - - 4,255 Total Residential Mortgage $ 894,542 $ 629,503 $ 345,194 $ 517,338 $ 601,481 $ 1,056,170 $ - $ - $ 4,044,228 Home Equity Pass $ - $ - $ - $ - $ - $ 5,337 $ 1,557,040 $ 38,766 $ 1,601,143 Classified - - - - - 69 3,212 1,062 4,343 Total Home Equity $ - $ - $ - $ - $ - $ 5,406 $ 1,560,252 $ 39,828 $ 1,605,486 Automobile Pass $ 167,991 $ 230,969 $ 175,173 $ 78,461 $ 39,677 $ 17,509 $ - $ - $ 709,780 Classified - 28 23 91 - 15 - - 157 Total Automobile $ 167,991 $ 230,997 $ 175,196 $ 78,552 $ 39,677 $ 17,524 $ - $ - $ 709,937 Other 1 Pass $ 57,497 $ 157,529 $ 103,895 $ 47,942 $ 11,616 $ 3,933 $ 32,845 $ 1,575 $ 416,832 Classified 18 99 43 36 14 2 17 29 258 Total Other $ 57,515 $ 157,628 $ 103,938 $ 47,978 $ 11,630 $ 3,935 $ 32,862 $ 1,604 $ 417,090 Total Consumer $ 1,120,048 $ 1,018,128 $ 624,328 $ 643,868 $ 652,788 $ 1,083,035 $ 1,593,114 $ 41,432 $ 6,776,741 Total Loans and Leases $ 2,750,366 $ 1,877,674 $ 1,243,476 $ 1,021,317 $ 1,026,082 $ 1,738,977 $ 2,093,169 $ 42,547 $ 11,793,608 1 Comprised of other revolving credit, installment, and lease financing. For the nine months ended September 30, 2020, $1.5 million revolving loans were converted to term loans. The following presents by loan class and credit quality indicator, the recorded investment in the Company’s loans and leases as of December 31, 2019. December 31, 2019 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,306,040 $ 2,463,858 $ 188,832 $ 120,933 $ 4,079,663 Special Mention 37,722 16,453 4,148 — 58,323 Classified 35,390 37,740 1,190 1,521 75,841 Total $ 1,379,152 $ 2,518,051 $ 194,170 $ 122,454 $ 4,213,827 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,886,389 $ 1,671,468 $ 719,337 $ 488,113 $ 6,765,307 Classified 4,711 4,605 949 1,493 11,758 Total $ 3,891,100 $ 1,676,073 $ 720,286 $ 489,606 $ 6,777,065 Total Recorded Investment in Loans and Leases $ 10,990,892 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 September 30, 2020, and December 31, 2019. (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 September 30, 2020 Commercial Commercial and Industrial $ 220 $ 47 $ — $ 475 $ 742 $ 1,907,740 $ 1,908,482 $ 290 Commercial Mortgage — — — 8,615 8,615 2,736,996 2,745,611 8,615 Construction — — — — — 250,943 250,943 — Lease Financing — — — — — 111,831 111,831 — Total Commercial 220 47 — 9,090 9,357 5,007,510 5,016,867 8,905 Consumer Residential Mortgage 2,695 1,583 6,607 3,543 14,428 4,029,800 4,044,228 — Home Equity 2,628 1,019 2,571 3,661 9,879 1,595,607 1,605,486 1,396 Automobile 2,769 119 156 — 3,044 706,893 709,937 — Other 1 1,856 650 258 — 2,764 414,326 417,090 — Total Consumer 9,948 3,371 9,592 7,204 30,115 6,746,626 6,776,741 1,396 Total $ 10,168 $ 3,418 $ 9,592 $ 16,294 $ 39,472 $ 11,754,136 $ 11,793,608 $ 10,301 As of December 31, 2019 Commercial Commercial and Industrial $ 12,534 $ 148 $ — $ 830 $ 13,512 $ 1,365,640 $ 1,379,152 $ 421 Commercial Mortgage 2,998 — — 9,244 12,242 2,505,809 2,518,051 9,244 Construction 101 51 — — 152 194,018 194,170 — Lease Financing 720 — — — 720 121,734 122,454 — Total Commercial 16,353 199 — 10,074 26,626 4,187,201 4,213,827 9,665 Consumer Residential Mortgage 6,097 2,070 1,839 4,125 14,131 3,876,969 3,891,100 1,429 Home Equity 3,949 2,280 4,125 3,181 13,535 1,662,538 1,676,073 412 Automobile 16,067 4,154 949 — 21,170 699,116 720,286 — Other 1 3,498 2,074 1,493 — 7,065 482,541 489,606 — Total Consumer 29,611 10,578 8,406 7,306 55,901 6,721,164 6,777,065 1,841 Total $ 45,964 $ 10,777 $ 8,406 $ 17,380 $ 82,527 $ 10,908,365 $ 10,990,892 $ 11,506 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 September 30, 2020, and December 31, 2019. September 30, 2020 December 31, 2019 (dollars in thousands) Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Total Non- accrual loans Commercial Commercial and Industrial $ 475 $ — $ 475 $ 830 Commercial Mortgage 3,544 5,071 8,615 9,244 Total Commercial 4,019 5,071 9,090 10,074 Consumer Residential Mortgage 3,202 341 3,543 4,125 Home Equity 3,661 — 3,661 3,181 Total Consumer 6,863 341 7,204 7,306 Total $ 10,882 $ 5,412 $ 16,294 $ 17,380 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 $63.0 million as of September 30, 2020, and $69.1 million as of December 31, 2019. There were $0.2 million and $0.3 million commitments to lend additional funds on loans modified in a TDR as of September 30, 2020, and December 31, 2019, 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 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 and nine months ended September 30, 2020, and September 30, 2019. Loans Modified as a TDR for the Three Months Ended September 30, 2020 Loans Modified as a TDR for the Three Months Ended September 30, 2019 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 1 $ 92 $ 1 1 $ 45 — Total Commercial 1 92 1 1 45 — Consumer Home Equity 2 134 — — — — Automobile 12 227 4 86 1,665 23 Other 2 7 93 4 14 117 3 Total Consumer 21 454 8 100 1,782 26 Total 22 $ 546 $ 9 101 $ 1,827 $ 26 Loans Modified as a TDR for the Nine Months Ended September 30, 2020 Loans Modified as a TDR for the Nine Months Ended September 30, 2019 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 3 $ 188 $ 3 5 $ 244 $ 14 Commercial Mortgage 1 1,099 — 1 3,766 — Total Commercial 4 1,287 3 6 4,010 14 Consumer Residential Mortgage — — — 1 57 — Home Equity 2 134 — 2 246 — Automobile 81 1,346 22 271 5,011 69 Other 2 42 357 15 75 459 12 Total Consumer 125 1,837 37 349 5,773 81 Total 129 $ 3,124 $ 40 355 $ 9,783 $ 95 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 and nine months ended September 30, 2020, and December 31, 2019, 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 September 30, 2020 Three Months Ended September 30, 2019 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 Residential Mortgage — — 1 $ 133 Home Equity — — 1 195 Automobile 1 6 9 126 Other 2 — — 9 72 Total Consumer 1 6 20 526 Total 1 $ 6 20 $ 526 Nine Months Ended September 30, 2020 Nine Months Ended September 30, 2019 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 Commercial Commercial and Industrial — $ — 1 $ 55 Total Commercial — — 1 55 Consumer Residential Mortgage — — 1 133 Home Equity — — 1 195 Automobile 33 591 22 326 Other 2 6 38 24 144 Total Consumer 39 629 48 798 Total 39 $ 629 49 $ 853 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 began offering 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 continues to negatively impact the economy, the Company began offering an additional round of loan modifications to borrowers continuing to struggle 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 forbearance period. The Company offers several repayment options such as immediate repayment, repayment over a designated time period or as a balloon payment at maturity, or by extending the loan term. These modifications generally do not involve forgiveness or interest rate reductions. The CARES Act, along with a joint agency statement issued by banking agencies, provide that modifications made in response to COVID-19 are not required to be accounted for as a TDR. Accordingly, the Company does not account for such loan modifications as TDRs. 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 during the deferral period. Additional round of lease concessions were not material. See Note 1 Summary of Significant Accounting Policies for more information. As of September 30, 2020, these COVID-19 related loan and lease modifications totaled $836.7 million (674 loans and leases) for the commercial segment and $691.2 million (16,104 loans and leases) for the consumer segment. Foreclosure Proceedings Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure totaled $1.1 million as of September 30, 2020.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2020
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 $3.0 billion and $3.1 billion as of September 30, 2020, and as of December 31, 2019, 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 $1.7 million and $1.8 million September 30, 2020, and September 30, 2019, respectively, and $5.4 million for the nine months ended September 30, 2020, and September 30, 2019. Servicing income is recorded in mortgage banking income in the Company’s consolidated statements of income. The Company’s residential mortgage investor loan servicing portfolio is primarily comprised of fixed rate loans concentrated in Hawaii. For the three and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Balance at Beginning of Period $ 1,068 $ 1,212 $ 1,126 $ 1,290 Change in Fair Value: Due to Payoffs (50 ) (38 ) (108 ) (116 ) Total Changes in Fair Value of Mortgage Servicing Rights (50 ) (38 ) (108 ) (116 ) Balance at End of Period $ 1,018 $ 1,174 $ 1,018 $ 1,174 For the three and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Balance at Beginning of Period $ 21,836 $ 23,021 $ 23,896 $ 23,020 Servicing Rights that Resulted From Asset Transfers 872 1,263 3,042 2,788 Amortization (1,271 ) (1,032 ) (3,684 ) (2,546 ) Valuation Allowance Recovery (Provision) (568 ) (18 ) (2,385 ) (28 ) Balance at End of Period $ 20,869 $ 23,234 $ 20,869 $ 23,234 Valuation Allowance: Balance at Beginning of Period $ (1,817 ) $ (10 ) $ — $ — Valuation Allowance Recovery (Provision) (568 ) (18 ) (2,385 ) (28 ) Balance at End of Period $ (2,385 ) $ (28 ) $ (2,385 ) $ (28 ) Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 21,836 $ 24,905 $ 25,714 $ 29,218 End of Period $ 20,870 $ 23,674 $ 20,870 $ 23,674 The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of September 30, 2020, and December 31, 2019, were as follows: September 30, 2020 December 31, 2019 Weighted-Average Constant Prepayment Rate 1 14.07 % 10.76 % Weighted-Average Life (in years) 5.09 6.20 Weighted-Average Note Rate 3.90 % 3.99 % Weighted-Average Discount Rate 2 5.88 % 7.33 % 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 September 30, 2020, and December 31, 2019, is presented in the following table. (dollars in thousands) September 30, 2020 December 31, 2019 Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (228 ) $ (296 ) Decrease in fair value from 50 bps adverse change (452 ) (586 ) Discount Rate Decrease in fair value from 25 bps adverse change (205 ) (264 ) Decrease in fair value from 50 bps adverse change (406 ) (522 ) 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	9 Months Ended
	Sep. 30, 2020
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 $117.9 million and $76.3 million as of September 30, 2020, and December 31, 2019, respectively, and are included in other assets in the consolidated statements of condition. Unfunded Commitments As of September 30, 2020, the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2020 $ 12,820 2021 10,283 2022 6,026 2023 6,059 2024 58 Thereafter 3,772 Total Unfunded Commitments $ 39,018 The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three and nine months ended September 30, 2020, and September 30, 2019. Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Effective Yield Method Tax credits and other tax benefits recognized $ 2,938 $ 2,930 $ 8,814 $ 8,789 Amortization Expense in Provision for Income Taxes 2,347 1,891 7,042 5,674 Proportional Amortization Method Tax credits and other tax benefits recognized $ 1,794 $ 753 $ 4,839 $ 2,260 Amortization Expense in Provision for Income Taxes 1,345 645 3,580 1,934 There were no impairment losses related to LIHTC investments during the nine months ended September 30, 2020, and September 30, 2019.

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2020
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 $19.2 million and $5.1 million as of September 30, 2020, and December 31, 2019, 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 for more information. 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 September 30, 2020, and December 31, 2019, 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 September 30, 2020 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ — $ 100 $ — $ 490.0 $ 590.0 Mortgage-Backed Securities: Residential - Government Agencies 1,516 — 22,158 93,933 117,607 Residential - U.S. Government-Sponsored Enterprises — — 2,842 481,067 483,909 Total $ 1,516 $ 100 $ 25,000 $ 575,490 $ 602,106 December 31, 2019 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 199,173 $ 38,065 $ 237,238 Debt Securities Issued by States and Political Subdivisions 1,200 1,100 — 490 2,790 Mortgage-Backed Securities: Residential - Government Agencies — 1,516 25,827 88,391 115,734 Residential - U.S. Government-Sponsored Enterprises — — — 248,544 248,544 Total $ 1,200 $ 2,616 $ 225,000 $ 375,490 $ 604,306 The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of September 30, 2020, and December 31, 2019. 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 September 30, 2020 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 5 $ — $ 5 $ 5 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 19,161 — 19,161 5 8,962 10,194 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 2,106 — 2,106 — 2,106 — $ 602,106 $ — $ 602,106 $ — $ 602,106 $ — December 31, 2019 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 584 $ — $ 584 $ 584 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 5,361 — 5,361 584 3,818 959 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 4,306 — 4,306 — 4,306 — $ 604,306 $ — $ 604,306 $ — $ 604,306 $ — 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 $634.6 million and $645.3 million as of September 30, 2020, and December 31, 2019, respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $4.3 million and $5.5 million as of September 30, 2020, and December 31, 2019, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019: (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (6,771 ) $ (1,795 ) $ (4,976 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 104 28 76 Net Unrealized Gains (Losses) on Investment Securities (6,667 ) (1,767 ) (4,900 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 570 151 419 Amortization of Prior Service Credit (61 ) (16 ) (45 ) Defined Benefit Plans, Net 509 135 374 Other Comprehensive Income (Loss) $ (6,158 ) $ (1,632 ) $ (4,526 ) Three Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 7,314 $ 1,938 $ 5,376 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 39 10 29 Net Unrealized Gains (Losses) on Investment Securities 7,353 1,948 5,405 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 406 108 298 Amortization of Prior Service Credit (72 ) (19 ) (53 ) Defined Benefit Plans, Net 334 89 245 Other Comprehensive Income (Loss) $ 7,687 $ 2,037 $ 5,650 Nine Months Ended September 30, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 60,177 $ 15,945 $ 44,232 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 1 289 76 213 Net Unrealized Gains (Losses) on Investment Securities 60,389 16,000 44,389 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,711 454 1,257 Amortization of Prior Service Credit (184 ) (49 ) (135 ) Defined Benefit Plans, Net 1,527 405 1,122 Other Comprehensive Income (Loss) $ 61,916 $ 16,405 $ 45,511 Nine Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 38,077 $ 10,090 $ 27,987 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (63 ) (17 ) (46 ) Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 804 212 592 Net Unrealized Gains (Losses) on Investment Securities 38,818 10,285 28,533 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,218 323 895 Amortization of Prior Service Credit (216 ) (57 ) (159 ) Defined Benefit Plans, Net 1,002 266 736 Other Comprehensive Income (Loss) $ 39,820 $ 10,551 $ 29,269 1 The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2020, and September 30, 2019: (dollars in thousands) Investment Securities- Available- for-Sale Investment Securities- Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended September 30, 2020 Balance at Beginning of Period $ 57,511 $ (578 ) $ (38,008 ) $ 18,925 Other Comprehensive Income (Loss) Before Reclassifications (4,976 ) — — (4,976 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 76 374 450 Total Other Comprehensive Income (Loss) (4,976 ) 76 374 (4,526 ) Balance at End of Period $ 52,535 $ (502 ) $ (37,634 ) $ 14,399 Three Months Ended September 30, 2019 Balance at Beginning of Period $ 8,859 $ (764 ) $ (35,519 ) $ (27,424 ) Other Comprehensive Income (Loss) Before Reclassifications 5,376 — — 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 29 245 274 Total Other Comprehensive Income (Loss) 5,376 29 245 5,650 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Nine Months Ended September 30, 2020 Balance at Beginning of Period $ 8,359 $ (715 ) $ (38,756 ) $ (31,112 ) Other Comprehensive Income (Loss) Before Reclassifications 44,232 — — 44,232 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (56 ) 213 1,122 1,279 Total Other Comprehensive Income (Loss) 44,176 213 1,122 45,511 Balance at End of Period $ 52,535 $ (502 ) $ (37,634 ) $ 14,399 Nine Months Ended September 30, 2019 Balance at Beginning of Period $ (10,447 ) $ (4,586 ) $ (36,010 ) $ (51,043 ) Other Comprehensive Income (Loss) Before Reclassifications 27,987 — — 27,987 Transfers (3,259 ) 3,259 — — Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (46 ) 592 736 1,282 Total Other Comprehensive Income (Loss) 24,682 3,851 736 29,269 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2020, and September 30, 2019: 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 September 30, (dollars in thousands) 2020 2019 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (103 ) $ (39 ) Interest Income 27 10 Provision for Income Tax (76 ) (29 ) Net of Tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 62 72 Net Actuarial Losses 2 (571 ) (406 ) (509 ) (334 ) Total Before Tax 135 89 Provision for Income Tax (374 ) (245 ) Net of Tax Total Reclassifications for the Period $ (450 ) $ (274 ) Net of Tax 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 Nine Months Ended September 30, (dollars in thousands) 2020 2019 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (289 ) $ (804 ) Interest Income 76 212 Provision for Income Tax (213 ) (592 ) Net of Tax Sale of Investment Securities Available-for-Sale 77 63 Investment Securities Gains (Losses), Net (21 ) (17 ) Provision for Income Tax 56 46 Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 185 216 Net Actuarial Losses 2 (1,712 ) (1,218 ) (1,527 ) (1,002 ) Total Before Tax 405 266 Provision for Income Tax (1,122 ) (736 ) Net of Tax Total Reclassifications for the Period $ (1,279 ) $ (1,282 ) Net of Tax 1 2 Pension Plans and Postretirement Benefit Plan

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Denominator for Basic Earnings Per Share 39,745,120 40,190,508 39,710,252 40,554,036 Dilutive Effect of Equity Based Awards 124,015 260,234 162,154 252,259 Denominator for Diluted Earnings Per Share 39,869,135 40,450,742 39,872,406 40,806,295 Antidilutive Stock Options and Restricted Stock Outstanding 108,207 — 106,140 2,399

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Business Segments	Note 10. Business Segments Effective January 1, 2020, the Company changed segments based on management structure and strategic focus which is placing a greater emphasis on customer segment vs. product type. 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 67 branch locations and 358 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 and nine months ended September 30, 2020, and September 30, 2019, were as follows: (dollars in thousands) Consumer Banking Commercial Banking Treasury and Other Consolidated Total Three Months Ended September 30, 2020 Net Interest Income $ 73,868 $ 47,797 $ 2,501 $ 124,166 Provision for Credit Losses (1,372 ) (85 ) 30,057 28,600 Net Interest Income After Provision for Credit Losses 75,240 47,882 (27,556 ) 95,566 Noninterest Income 31,776 7,672 2,286 41,734 Noninterest Expense (69,408 ) (15,430 ) (5,111 ) (89,949 ) Income Before Provision for Income Taxes 37,608 40,124 (30,381 ) 47,351 Provision for Income Taxes (9,627 ) (9,784 ) 9,900 (9,511 ) Net Income $ 27,981 $ 30,340 $ (20,481 ) $ 37,840 Total Assets as of September 30, 2020 $ 7,383,822 $ 5,027,836 $ 7,697,831 $ 20,109,489 Three Months Ended September 30, 2019 1 Net Interest Income $ 76,289 $ 46,791 $ 1,816 $ 124,896 Provision for Credit Losses 3,116 (130 ) 1,264 4,250 Net Interest Income After Provision for Credit Losses 73,173 46,921 552 120,646 Noninterest Income 36,627 8,739 1,141 46,507 Noninterest Expense (75,198 ) (21,330 ) (3,821 ) (100,349 ) Income Before Provision for Income Taxes 34,602 34,330 (2,128 ) 66,804 Provision for Income Taxes (8,506 ) (8,560 ) 2,314 (14,752 ) Net Income $ 26,096 $ 25,770 $ 186 $ 52,052 Total Assets as of September 30, 2019 1 $ 6,993,290 $ 4,145,717 $ 6,533,133 $ 17,672,140 Nine Months Ended September 30, 2020 1 Net Interest Income $ 221,003 $ 144,253 $ 11,567 $ 376,823 Provision for Credit Losses 8,215 (819 ) 95,204 102,600 Net Interest Income After Provision for Credit Losses 212,788 145,072 (83,637 ) 274,223 Noninterest Income 93,309 26,483 19,359 139,151 Noninterest Expense (210,744 ) (47,552 ) (16,857 ) (275,153 ) Income Before Provision for Income Taxes 95,353 124,003 (81,135 ) 138,221 Provision for Income Taxes (24,235 ) (30,278 ) 27,782 (26,731 ) Net Income $ 71,118 $ 93,725 $ (53,353 ) $ 111,490 Total Assets as of September 30, 2020 $ 7,383,822 $ 5,027,836 $ 7,697,831 $ 20,109,489 Nine Months Ended September 30, 2019 1 Net Interest Income $ 229,704 $ 139,784 $ 4,342 $ 373,830 Provision for Credit Losses 7,866 1,141 2,243 11,250 Net Interest Income After Provision for Credit Losses 221,838 138,643 2,099 362,580 Noninterest Income 107,072 22,738 5,826 135,636 Noninterest Expense (213,168 ) (63,545 ) (9,418 ) (286,131 ) Income Before Provision for Income Taxes 115,742 97,836 (1,493 ) 212,085 Provision for Income Taxes (28,745 ) (22,507 ) 6,937 (44,315 ) Net Income $ 86,997 $ 75,329 $ 5,444 $ 167,770 Total Assets as of September 30, 2019 1 $ 6,993,290 $ 4,145,717 $ 6,533,133 $ 17,672,140 1 Certain prior period information has been reclassified to conform to current presentation.

Pension Plans and Postretiremen

Pension Plans and Postretirement Benefit Plan	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019. Pension Benefits Postretirement Benefits (dollars in thousands) 2020 2019 2020 2019 Three Months Ended September 30, Service Cost $ — $ — $ 152 $ 117 Interest Cost 900 1,093 230 257 Expected Return on Plan Assets (1,258 ) (1,249 ) — — Amortization of: Prior Service Credit — — (61 ) (72 ) Net Actuarial Losses (Gains) 570 484 — (78 ) Net Periodic Benefit Cost $ 212 $ 328 $ 321 $ 224 Nine Months Ended September 30, Service Cost $ — $ — $ 454 $ 235 Interest Cost 2,699 2,187 694 515 Expected Return on Plan Assets (3,773 ) (2,498 ) — — Amortization of: Prior Service Credit — — (184 ) (144 ) Net Actuarial Losses (Gains) 1,711 968 — (156 ) Net Periodic Benefit Cost $ 637 $ 657 $ 964 $ 450 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 and nine months ended September 30, 2020, the Company contributed $0.1 million and $0.3 million, respectively, to the pension plans and $0.3 million and $0.8 million, respectively, to the postretirement benefit plan. The Company expects to contribute a total of $0.4 million to the pension plans and $1.0 million to the postretirement benefit plan for the year ending December 31, 2020.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019, were as follows: September 30, 2020 December 31, 2019 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 63,895 $ 3,316 $ 48,677 $ 1,280 Forward Commitments 62,492 (215 ) 82,735 (182 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 1,275,732 103,662 802,389 26,070 Pay Fixed/Receive Variable Swaps 1,275,732 (19,156 ) 802,389 (4,777 ) Foreign Exchange Contracts 98,173 213 85,499 163 Conversion Rate Swap Agreement 121,854 — 114,499 — The following table presents the Company’s derivative financial instruments, their fair values, and their location in the consolidated statements of condition as of September 30, 2020, and December 31, 2019: Derivative Financial Instruments September 30, 2020 December 31, 2019 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 3,316 $ — $ 1,280 $ — Forward Commitments 9 224 23 205 Interest Rate Swap Agreements 103,671 19,165 27,344 6,051 Foreign Exchange Contracts 353 140 284 121 Total $ 107,349 $ 19,529 $ 28,931 $ 6,377 1 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 and nine months ended September 30, 2020, and September 30, 2019: Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Nine Months Ended Not Designated as Hedging Instruments Recognized in the September 30, September 30, (dollars in thousands) Statements of Income 2020 2019 2020 2019 Interest Rate Lock Commitments Mortgage Banking $ 4,903 $ 4,381 $ 15,556 $ 9,667 Forward Commitments Mortgage Banking (595 ) (282 ) (3,652 ) (2,257 ) Interest Rate Swap Agreements Other Noninterest Income 2,575 2,967 12,041 5,863 Foreign Exchange Contracts Other Noninterest Income 467 480 1,403 2,546 Conversion Rate Swap Agreement Investment Securities Gains (Losses), Net — (453 ) — (453 ) Total $ 7,350 $ 7,093 $ 25,348 $ 15,366 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 September 30, 2020, and December 31, 2019, 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 September 30, 2020, and December 31, 2019, 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	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Guarantees	Note 13. Commitments, Contingencies, and Guarantees The Company’s credit commitments as of September 30, 2020, and December 31, 2019, were as follows: (dollars in thousands) September 30, 2020 December 31, 2019 Unfunded Commitments to Extend Credit $ 2,774,751 $ 2,713,937 Standby Letters of Credit 104,695 81,000 Commercial Letters of Credit 12,394 16,981 Total Credit Commitments $ 2,891,840 $ 2,811,918 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 the Bank’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 October 16, 2019, the Bank reached a tentative settlement with the named plaintiff, subject to documentation and court approvals. 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. On March 12, 2020, the court granted preliminary approval of the settlement. As a result, the Company recorded an $8.0 million liability reserve relating to this claim. A court hearing for final approval of the settlement was held on July 23, 2020. The judge indicated he approved all substantive and procedural terms of the settlement; however, the judge declined to issue the approval order until the Class Action Fairness Act (CAFA) notice period expires on December 15, 2020. A portion of the settlement fund has been put into an interest bearing escrow account maintained by the Settlement Administrator, and payments in the settlement of this claim will be made after the Court issues its final approval order. On June 2, 2020, Aloha Accounting and Tax LLC filed a lawsuit (seeking class action status) against the Bank, First Hawaiian Bank, American Savings Bank, Central Pacific Bank, and Kabbage Inc. (collectively, the “Defendants”) alleging that the Defendants did not pay agent fees owed under the CARES Act PPP. An amended complaint was filed on June 23, 2020, adding Bank of America as a co-defendant. Similar lawsuits have been filed against banks across the country. On August 5, 2020, Plaintiffs’ motion seeking to consolidate the cases in a Multidistrict Litigation (MDL) was denied. O n October 13, 2020, the Plaintiff voluntarily dismissed the case without prejudice. 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 September 30, 2020, the unpaid principal balance of residential mortgage loans sold by the Company was $2.7 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 nine months ended September 30, 2020, there were $0.5 million in residential mortgage loans repurchased as a result of the representation and warranty provisions contained in the applicable contract. As of September 30, 2020, 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 nine months ended September 30, 2020, there were no loans repurchased related to loan servicing activities. As of September 30, 2020, 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 September 30, 2020, 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 September 30, 2020, 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	9 Months Ended
	Sep. 30, 2020
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 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 September 30, 2020, and December 31, 2019, 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 September 30, 2020, and December 31, 2019: 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 September 30, 2020 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,111 $ 180,334 $ — $ 181,445 Debt Securities Issued by States and Political Subdivisions — 46,803 — 46,803 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 1,016 — 1,016 Debt Securities Issued by Corporations — 224,454 — 224,454 Mortgage-Backed Securities: Residential - Government Agencies — 1,520,502 — 1,520,502 Residential - U.S. Government-Sponsored Enterprises — 937,068 — 937,068 Commercial - Government Agencies — 279,025 — 279,025 Total Mortgage-Backed Securities — 2,736,595 — 2,736,595 Total Investment Securities Available-for-Sale 1,111 3,189,202 — 3,190,313 Mortgage Servicing Rights — — 1,018 1,018 Other Assets 48,184 — — 48,184 Derivatives 1 — 362 106,987 107,349 Total Assets Measured at Fair Value on a Recurring Basis as of September 30, 2020 $ 49,295 $ 3,189,564 $ 108,005 $ 3,346,864 Liabilities: Derivatives 1 $ — $ 364 $ 19,165 $ 19,529 Total Liabilities Measured at Fair Value on a Recurring Basis as of September 30, 2020 $ — $ 364 $ 19,165 $ 19,529 December 31, 2019 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,155 $ 219,976 $ — $ 221,131 Debt Securities Issued by States and Political Subdivisions — 55,097 — 55,097 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 22,147 — 22,147 Debt Securities Issued by Corporations — 336,321 — 336,321 Mortgage-Backed Securities: Residential - Government Agencies — 1,172,826 — 1,172,826 Residential - U.S. Government-Sponsored Enterprises — 586,761 — 586,761 Commercial - Government Agencies — 224,720 — 224,720 Total Mortgage-Backed Securities — 1,984,307 — 1,984,307 Total Investment Securities Available-for-Sale 1,155 2,617,848 — 2,619,003 Loans Held for Sale — 39,062 — 39,062 Mortgage Servicing Rights — — 1,126 1,126 Other Assets 41,464 — — 41,464 Derivatives 1 — 308 28,623 28,931 Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2019 $ 42,619 $ 2,657,218 $ 29,749 $ 2,729,586 Liabilities: Derivatives 1 $ — $ 327 $ 6,050 $ 6,377 Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2019 $ — $ 327 $ 6,050 $ 6,377 1 The fair value of each class of derivatives is shown in Note 12 Derivative Financial Instruments For the three and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, 2020 Balance as of July 1, 2020 $ 1,068 $ 88,995 Realized and Unrealized Net Gains (Losses): Included in Net Income (50 ) 4,909 Transfers to Loans Held for Sale — (4,242 ) Variation Margin Payments — (1,840 ) Balance as of September 30, 2020 $ 1,018 $ 87,822 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2020 $ — $ 87,822 Three Months Ended September 30, 2019 Balance as of July 1, 2019 $ 1,212 $ 19,956 Realized and Unrealized Net Gains (Losses): Included in Net Income (38 ) 4,360 Transfers to Loans Held for Sale — (3,736 ) Variation Margin Payments — 11,331 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2019 $ — $ 31,911 Nine Months Ended September 30, 2020 Balance as of January 1, 2020 $ 1,126 22,573 Realized and Unrealized Net Gains (Losses): Net (108 ) 15,372 Transfers to Loans Held for Sale — (13,521 ) Variation Margin Payments — 63,398 Balance as of September 30, 2020 $ 1,018 87,822 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2020 $ — $ 87,822 Nine Months Ended September 30, 2019 Balance as of January 1, 2019 $ 1,290 $ 4,416 Realized and Unrealized Net Gains (Losses): Included in Net Income (116 ) 9,602 Transfers to Loans Held for Sale — (7,750 ) Variation Margin Payments — 25,643 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2019 $ — $ 31,911 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 September 30, 2020, and December 31, 2019, the significant unobservable inputs used in the fair value measurements were as follows: September 30, 2020 December 31, 2019 (dollars in thousands) Valuation Technique Description Range Weighted Average 1 Fair Value Weighted Average 1 Fair Value Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.67% - 14.77 % 14.07 % $ 21,888 10.76 % $ 26,840 Discount Rate 5.86% - 6.35 % 5.88 % 7.33 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 75.40% - 99.00 % 91.03 % $ 3,316 92.24 % $ 1,280 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 0.32 % $ 84,506 0.20 % $ 21,293 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 September 30, 2020. There were no assets measured at fair value on a nonrecurring basis as of December 31, 2019. (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance September 30, 2020 Mortgage Servicing Rights - amortization method Level 3 $ 20,870 $ (2,385 ) The write-down of mortgage servicing rights accounted for under the amortization method was primarily due to changes in certain key assumptions used to estimate fair value. As previously mentioned, all of the Company's mortgage servicing rights are classified as Level 3 measurements due to the use of significant unobservable inputs, as well as significant management judgment and estimation. Fair Value Option The 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 December 31, 2019. There were no loans held for sale as of September 30, 2020. (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal December 31, 2019 Loans Held for Sale $ 39,062 $ 38,293 $ 769 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 and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, 2020, and December 31, 2019. 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) September 30, 2020 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,198,830 $ 3,288,668 $ 62,714 $ 3,225,954 $ — Loans 1 11,397,713 12,009,113 — — 12,009,113 Financial Instruments - Liabilities Time Deposits 1,721,977 1,729,433 — 1,729,433 — Securities Sold Under Agreements to Repurchase 602,106 654,283 — 654,283 — Other Debt 2 50,000 51,648 — 51,648 — December 31, 2019 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,042,294 $ 3,062,882 $ 275,663 $ 2,787,219 $ — Loans 1 10,664,885 10,873,208 — — 10,873,208 Financial Instruments - Liabilities Time Deposits 1,802,431 1,800,773 — 1,800,773 — Securities Sold Under Agreements to Repurchase 604,306 627,780 — 627,780 — Other Debt 2 75,000 75,581 — 75,581 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes finance lease obligations.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Note 15. Revenue Recognition On January 1, 2018, the Company adopted ASU No. 2014-09 “Revenue from Contracts with Customers” (Topic 606) Trust and Asset Management Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to customers’ accounts. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Service Charges on Deposit Accounts Service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts), monthly service fees, check orders, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transaction based, and therefore, the Company’s performance obligation is satisfied and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Fees, Exchange, and Other Service Charges Fees, exchange, and other service charges are primarily comprised of debit card income, ATM fees, merchant services income, and other service charges. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a Company cardholder uses a non-Company ATM or a non-Company cardholder uses a Company ATM. Merchant services income mainly represents fees charged to merchants to process their debit and credit card transactions, in addition to account management fees. Other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Annuity and Insurance Annuity and insurance income primarily consists of commissions received on annuity product sales. The Company acts as an intermediary between the Company’s customer and the insurance carrier. The Company’s performance obligation is generally satisfied upon the issuance of the annuity policy. Shortly after the policy is issued, the carrier remits the commission payment to the Company, and the Company recognizes the revenue. The Company does not earn a significant amount of trailer fees on annuity sales. The majority of the trailer fees relates to variable annuity products and are calculated based on a percentage of market value at period end. Revenue is not recognized until the annuity’s market value can be determined. Other Other noninterest income consists of other recurring revenue streams such as commissions from sales of mutual funds and other investments, investment advisor fees from the Company’s Managed Account Platform Services (MAPS) wealth management product, safety deposit box rental fees, and other miscellaneous revenue streams. Commissions from the sale of mutual funds and other investments are recognized on trade date, which is when the Company has satisfied its performance obligation. The Company also receives periodic service fees (i.e., trailers) from mutual fund companies typically based on a percentage of net asset value. Trailer revenue is recorded over time, usually monthly or quarterly, as net asset value is determined. Investment advisor fees from the MAPS wealth management product is earned over time and based on an annual percentage rate of the net asset value. The investment advisor fees are charged to the customer’s account in advance on the first month of the quarter, and the revenue is recognized over the following three-month period. Safety deposit box rental fees are charged to the customer on an annual basis and recognized upon receipt of payment. The Company determined that since rentals and renewals occur fairly consistently over time, revenue is recognized on a basis consistent with the duration of the performance obligation. The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2020, and September 30, 2019. Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Noninterest Income In-scope of Topic 606: Trust and Asset Management $ 10,752 $ 10,930 $ 32,217 $ 33,076 Service Charges on Deposit Accounts 3,000 3,268 8,770 9,912 Fees, Exchange, and Other Service Charges 9,130 11,705 26,489 34,859 Annuity and Insurance 855 1,251 2,605 5,567 Other 2,131 2,224 6,697 7,200 Noninterest Income (in-scope of Topic 606) 25,868 29,378 76,778 90,614 Noninterest Income (out-of-scope of Topic 606) 15,866 17,129 62,373 45,022 Total Noninterest Income $ 41,734 $ 46,507 $ 139,151 $ 135,636 Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. The Company’s noninterest revenue streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is often received immediately or shortly after the Company satisfies its performance obligation and revenue is recognized. The Company does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. As of September 30, 2020, and December 31, 2019, the Company did not have any significant contract balances. Contract Acquisition Costs In connection with the adoption of Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a customer if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. Upon adoption of Topic 606, the Company did not capitalize any contract acquisition cost.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
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 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, 2019.
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. Prior to January 1, 2015, the Company utilized the effective yield method whereby the Company recognized tax credits generally over 10 years and amortized the initial cost of the investment to provide a constant effective yield over the period that tax credits are allocated to the Company. On January 1, 2015, the Company adopted ASU No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” Unfunded commitments to fund these low-income housing entities were $39.0 million and $21.3 million as of September 30, 2020, and December 31, 2019, 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 $123.6 million and $84.6 million as of September 30, 2020, and December 31, 2019, respectively, and is included in other assets in the consolidated statements of condition.
Accounting Standards Adopted in the Current Year	Accounting Standards Adopted in 2020 In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” The Company adopted the standard on January 1, 2020, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings, as of January 1, 2020 (i.e., modified retrospective approach). Upon adoption of the standard, the Company recorded a $5.1 million decrease to the reserve for credit losses, which resulted in a $3.6 million after-tax increase to retained earnings as of January 1, 2020. The tax effect resulted in an increase to deferred tax liabilities. This “Day 1” impact of CECL adoption is summarized below: (dollars in thousands) December 31, 2019 CECL Adoption Impact January 1, 2020 Allowance for Credit Losses: Commercial $ 73,801 $ (18,789 ) $ 55,012 Consumer 36,226 17,052 53,278 Total Allowance for Credit Losses 110,027 (1,737 ) 108,290 Reserve for Unfunded Commitments 6,822 (3,335 ) 3,487 Total Reserve for Credit Losses $ 116,849 $ (5,072 ) $ 111,777 Retained Earnings Total Pre-tax Impact $ 5,072 Tax Effect (1,440 ) Increase to Retained Earnings $ 3,632 The Company did not record an allowance for AFS or HTM securities on Day 1 as the investment portfolio consists primarily of debt securities explicitly or implicitly backed by the U.S. Government for which credit risk is deemed minimal. The impact going forward will depend on the composition, characteristics, and credit quality of the loan and securities portfolios as well as the economic conditions at future reporting periods. See Note 3 Investment Securities Loans and Leases and the Allowance for Credit Losses In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments.” With respect to Topic 326, ASU 2019-04 clarifies the scope of the credit losses standard and addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. The Company made the accounting policy elections not to measure an allowance for credit losses on accrued interest receivable, to write-off accrued interest amounts by reversing interest income, and to present accrued interest receivable separately from the related financial asset on the statements of financial condition. The amendments to Topic 326 were adopted concurrently with ASU 2016-13 on January 1, 2020. The financial statement impact in regards to the amendments to Topic 326 are incorporated within ASU 2016-13 mentioned above. With respect to Topic 825, on recognizing and measuring financial instruments, ASU 2019-04 addresses the scope of the guidance, the requirement for remeasurement under ASC 820 when using the measurement alternative, certain disclosure requirements and which equity securities have to be remeasured at historical exchange rates. The amendments to Topic 825 were effective for interim and annual reporting periods beginning after December 15, 2019, and did not have a material impact on the Company’s Consolidated Financial Statements. The Company elected to early adopt the amendments to Topic 815 in June 2019. See Note 1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, for more information. In May 2019, the FASB issued ASU No. 2019-05, “Financial Instruments - Credit Losses (Topic 326); Targeted Transition Relief.” In November 2019, the FASB issued ASU No. 2019-11, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.”

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Schedule of Allowance for Credit Losses Upon Adoption of ASU 2016-13	This “Day 1” impact of CECL adoption is summarized below: (dollars in thousands) December 31, 2019 CECL Adoption Impact January 1, 2020 Allowance for Credit Losses: Commercial $ 73,801 $ (18,789 ) $ 55,012 Consumer 36,226 17,052 53,278 Total Allowance for Credit Losses 110,027 (1,737 ) 108,290 Reserve for Unfunded Commitments 6,822 (3,335 ) 3,487 Total Reserve for Credit Losses $ 116,849 $ (5,072 ) $ 111,777 Retained Earnings Total Pre-tax Impact $ 5,072 Tax Effect (1,440 ) Increase to Retained Earnings $ 3,632

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	9 Months Ended
	Sep. 30, 2020
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) September 30, 2020 December 31, 2019 Interest-Bearing Deposits in Other Banks $ 4,233 $ 4,979 Funds Sold 736,524 254,574 Cash and Due From Banks 260,167 299,105 Total Cash and Cash Equivalents $ 1,000,924 $ 558,658

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019, were as follows: (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2020 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 182,605 $ 245 $ (1,405 ) $ 181,445 Debt Securities Issued by States and Political Subdivisions 45,313 1,491 (1 ) 46,803 Debt Securities Issued by U.S. Government-Sponsored Enterprises 937 79 — 1,016 Debt Securities Issued by Corporations 221,935 4,273 (1,754 ) 224,454 Mortgage-Backed Securities: Residential - Government Agencies 1,483,465 37,344 (307 ) 1,520,502 Residential - U.S. Government-Sponsored Enterprises 917,366 19,904 (202 ) 937,068 Commercial - Government Agencies 267,225 11,863 (63 ) 279,025 Total Mortgage-Backed Securities 2,668,056 69,111 (572 ) 2,736,595 Total $ 3,118,846 $ 75,199 $ (3,732 ) $ 3,190,313 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 62,505 $ 211 $ (2 ) $ 62,714 Debt Securities Issued by States and Political Subdivisions 54,001 1,022 — 55,023 Debt Securities Issued by Corporations 12,770 279 — 13,049 Mortgage-Backed Securities: Residential - Government Agencies 792,360 33,324 (19 ) 825,665 Residential - U.S. Government-Sponsored Enterprises 2,184,472 52,270 (121 ) 2,236,621 Commercial - Government Agencies 92,722 2,967 (93 ) 95,596 Total Mortgage-Backed Securities 3,069,554 88,561 (233 ) 3,157,882 Total $ 3,198,830 $ 90,073 $ (235 ) $ 3,288,668 December 31, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 222,365 $ 213 $ (1,447 ) $ 221,131 Debt Securities Issued by States and Political Subdivisions 54,480 631 (14 ) 55,097 Debt Securities Issued by U.S. Government-Sponsored Enterprises 22,128 19 — 22,147 Debt Securities Issued by Corporations 335,553 1,401 (633 ) 336,321 Mortgage-Backed Securities: Residential - Government Agencies 1,164,466 11,627 (3,267 ) 1,172,826 Residential - U.S. Government-Sponsored Enterprises 584,272 4,363 (1,874 ) 586,761 Commercial - Government Agencies 224,372 2,889 (2,541 ) 224,720 Total Mortgage-Backed Securities 1,973,110 18,879 (7,682 ) 1,984,307 Total $ 2,607,636 $ 21,143 $ (9,776 ) $ 2,619,003 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 274,375 $ 1,319 $ (31 ) $ 275,663 Debt Securities Issued by States and Political Subdivisions 54,811 1,236 — 56,047 Debt Securities Issued by Corporations 14,975 — (138 ) 14,837 Mortgage-Backed Securities: Residential - Government Agencies 1,067,416 13,247 (5,348 ) 1,075,315 Residential - U.S. Government-Sponsored Enterprises 1,546,479 13,871 (2,478 ) 1,557,872 Commercial - Government Agencies 84,238 317 (1,407 ) 83,148 Total Mortgage-Backed Securities 2,698,133 27,435 (9,233 ) 2,716,335 Total $ 3,042,294 $ 29,990 $ (9,402 ) $ 3,062,882
Analysis of the Contractual Maturities of Investment Securities	The table below presents an analysis of the contractual maturities of the Company’s investment securities as of September 30, 2020. 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 $ 61,913 $ 61,802 Due After One Year Through Five Years 59,080 60,281 Due After Five Years Through Ten Years 148,282 151,301 Due After Ten Years — — 269,275 273,384 Debt Securities Issued by Government Agencies 181,515 180,334 Mortgage-Backed Securities: Residential - Government Agencies 1,483,465 1,520,502 Residential - U.S. Government-Sponsored Enterprises 917,366 937,068 Commercial - Government Agencies 267,225 279,025 Total Mortgage-Backed Securities 2,668,056 2,736,595 Total $ 3,118,846 $ 3,190,313 Held-to-Maturity: Due in One Year or Less 80,075 80,356 Due After One Year Through Five Years 49,201 50,430 129,276 130,786 Mortgage-Backed Securities: Residential - Government Agencies 792,360 825,665 Residential - U.S. Government-Sponsored Enterprises 2,184,472 2,236,621 Commercial - Government Agencies 92,722 95,596 Total Mortgage-Backed Securities 3,069,554 3,157,882 Total $ 3,198,830 $ 3,288,668
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 and nine months ended September 30, 2020, and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Gross Gains on Sales of Investment Securities $ — $ 38 $ 14,257 $ 7,701 Gross Losses on Sales of Investment Securities (1,121 ) (1,507 ) (3,132 ) (10,781 ) Net Gains (Losses) on Sales of Investment Securities $ (1,121 ) $ (1,469 ) $ 11,125 $ (3,080 )
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 September 30, 2020 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 134,162 $ (1,363 ) $ 24,886 $ (42 ) $ 159,048 $ (1,405 ) Debt Securities Issued by States and Political Subdivisions 26 (1 ) 60 — 86 (1 ) Debt Securities Issued by Corporations 75,000 (642 ) 65,000 (1,112 ) 140,000 (1,754 ) Mortgage-Backed Securities: Residential - Government Agencies 30,216 (223 ) 136,396 (84 ) 166,612 (307 ) Residential - U.S. Government-Sponsored Enterprises — — 95,943 (202 ) 95,943 (202 ) Commercial-Government Agencies — — 25,188 (63 ) 25,188 (63 ) Total Mortgage-Backed Securities 30,216 (223 ) 257,527 (349 ) 287,743 (572 ) Total $ 239,404 $ (2,229 ) $ 347,473 $ (1,503 ) $ 586,877 $ (3,732 ) December 31, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 65,479 $ (188 ) $ 101,761 $ (1,259 ) $ 167,240 $ (1,447 ) Debt Securities Issued by States and Political Subdivisions 6,788 (14 ) 440 — 7,228 (14 ) Debt Securities Issued by Corporations 25,892 (326 ) 74,693 (307 ) 100,585 (633 ) Mortgage-Backed Securities: Residential - Government Agencies 119,271 (526 ) 170,805 (2,741 ) 290,076 (3,267 ) Residential - U.S. Government-Sponsored Enterprises 187,861 (816 ) 73,720 (1,058 ) 261,581 (1,874 ) Commercial - Government Agencies 59,826 (319 ) 52,965 (2,222 ) 112,791 (2,541 ) Total Mortgage-Backed Securities 366,958 (1,661 ) 297,490 (6,021 ) 664,448 (7,682 ) Total $ 465,117 $ (2,189 ) $ 474,384 $ (7,587 ) $ 939,501 $ (9,776 )
Schedule of Interest Income from Taxable and Non-taxable Investment Securities	Interest income from taxable and non-taxable investment securities for the three and nine months ended September 30, 2020, and September 30, 2019, were as follows: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Taxable $ 30,027 $ 35,584 $ 96,150 $ 102,912 Non-Taxable 498 724 1,637 5,970 Total Interest Income from Investment Securities $ 30,525 $ 36,308 $ 97,787 $ 108,882
Schedule of Carrying Value of Federal Home Loan Bank of Des Moines Stock and Federal Reserve Bank Stock	As of September 30, 2020, and December 31, 2019, 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) September 30, 2020 December 31, 2019 Federal Home Loan Bank Stock $ 15,174 $ 13,000 Federal Reserve Bank Stock 18,123 21,093 Total $ 33,297 $ 34,093

Loans and Leases and the Allo_2

Loans and Leases and the Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019: (dollars in thousands) September 30, 2020 December 31, 2019 Commercial Commercial and Industrial $ 1,908,482 $ 1,379,152 Commercial Mortgage 2,745,611 2,518,051 Construction 250,943 194,170 Lease Financing 111,831 122,454 Total Commercial 5,016,867 4,213,827 Consumer Residential Mortgage 4,044,228 3,891,100 Home Equity 1,605,486 1,676,073 Automobile 709,937 720,286 Other 1 417,090 489,606 Total Consumer 6,776,741 6,777,065 Total Loans and Leases $ 11,793,608 $ 10,990,892
Schedule of Activity in Allowance by Portfolio Segment	The following presents by portfolio segment, the activity in the Allowance for the three and nine months ended September 30, 2020, and September 30, 2019. (dollars in thousands) Commercial Consumer Total Three Months Ended September 30, 2020 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 72,522 $ 100,917 $ 173,439 Loans and Leases Charged-Off (171 ) (2,176 ) (2,347 ) Recoveries on Loans and Leases Previously Charged-Off 231 3,573 3,804 Net Loans and Leases Recovered (Charged-Off) 60 1,397 1,457 Provision for Credit Losses 7,685 20,915 28,600 Balance at End of Period $ 80,267 $ 123,229 $ 203,496 Nine Months Ended September 30, 2020 Allowance for Credit Losses: Balance at Beginning of Period (December 31, 2019) $ 73,801 $ 36,226 $ 110,027 CECL Adoption (Day 1) Impact (18,789 ) 17,052 (1,737 ) Balance at Beginning of Period (January 1, 2020) 55,012 53,278 108,290 Loans and Leases Charged-Off (1,520 ) (16,287 ) (17,807 ) Recoveries on Loans and Leases Previously Charged-Off 2,084 8,329 10,413 Net Loans and Leases Recovered (Charged-Off) 564 (7,958 ) (7,394 ) Provision for Credit Losses 24,691 77,909 102,600 Balance at End of Period $ 80,267 $ 123,229 $ 203,496 Three Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 69,268 $ 38,404 $ 107,672 Loans and Leases Charged-Off (239 ) (5,516 ) (5,755 ) Recoveries on Loans and Leases Previously Charged-Off 318 2,451 2,769 Net Loans and Leases Recovered (Charged-Off) 79 (3,065 ) (2,986 ) Provision for Credit Losses 1,023 3,227 4,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 Nine Months Ended September 30, 2019 Allowance for Credit Losses: Balance at Beginning of Period $ 66,874 $ 39,819 $ 106,693 Loans and Leases Charged-Off (2,431 ) (15,281 ) (17,712 ) Recoveries on Loans and Leases Previously Charged-Off 1,220 7,485 8,705 Net Loans and Leases Recovered (Charged-Off) (1,211 ) (7,796 ) (9,007 ) Provision for Credit Losses 4,707 6,543 11,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936
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 September 30, 2020 . Term Loans by Origination Year (dollars in thousands) YTD September 30, 2020 2019 2018 2017 2016 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans and Leases September 30, 2020 Commercial Commercial and Industrial Pass $ 858,458 $ 171,894 $ 184,256 $ 73,712 $ 62,461 $ 86,296 $ 364,123 $ 977 $ 1,802,177 Special Mention 9,201 510 2,155 162 2,001 147 20,397 - 34,573 Classified 24,114 807 906 938 1,593 20,049 23,187 138 71,732 Total Commercial and Industrial $ 891,773 $ 173,211 $ 187,317 $ 74,812 $ 66,055 $ 106,492 $ 407,707 $ 1,115 $ 1,908,482 Commercial Mortgage Pass $ 588,510 $ 521,907 $ 377,630 $ 270,617 $ 290,575 $ 487,821 $ 74,547 $ - $ 2,611,607 Special Mention 5,621 24,850 19,416 15,463 1,252 5,432 - - 72,034 Classified 41,454 659 4,884 276 4,791 9,906 - - 61,970 Total Commercial Mortgage $ 635,585 $ 547,416 $ 401,930 $ 286,356 $ 296,618 $ 503,159 $ 74,547 $ - $ 2,745,611 Construction Pass $ 89,712 $ 117,759 $ 14,221 $ 11,450 $ - $ - $ 17,801 $ - $ 250,943 Total Construction $ 89,712 $ 117,759 $ 14,221 $ 11,450 $ - $ - $ 17,801 $ - $ 250,943 Lease Financing Pass $ 13,214 $ 21,089 $ 14,549 $ 4,783 $ 10,509 $ 46,291 $ - $ - $ 110,435 Classified 34 71 1,131 48 112 - - - 1,396 Total Lease Financing $ 13,248 $ 21,160 $ 15,680 $ 4,831 $ 10,621 $ 46,291 $ - $ - $ 111,831 Total Commercial $ 1,630,318 $ 859,546 $ 619,148 $ 377,449 $ 373,294 $ 655,942 $ 500,055 $ 1,115 $ 5,016,867 Consumer Residential Mortgage Pass $ 894,542 $ 629,503 $ 345,194 $ 516,410 $ 601,481 $ 1,052,843 $ - $ - $ 4,039,973 Classified - - - 928 - 3,327 - - 4,255 Total Residential Mortgage $ 894,542 $ 629,503 $ 345,194 $ 517,338 $ 601,481 $ 1,056,170 $ - $ - $ 4,044,228 Home Equity Pass $ - $ - $ - $ - $ - $ 5,337 $ 1,557,040 $ 38,766 $ 1,601,143 Classified - - - - - 69 3,212 1,062 4,343 Total Home Equity $ - $ - $ - $ - $ - $ 5,406 $ 1,560,252 $ 39,828 $ 1,605,486 Automobile Pass $ 167,991 $ 230,969 $ 175,173 $ 78,461 $ 39,677 $ 17,509 $ - $ - $ 709,780 Classified - 28 23 91 - 15 - - 157 Total Automobile $ 167,991 $ 230,997 $ 175,196 $ 78,552 $ 39,677 $ 17,524 $ - $ - $ 709,937 Other 1 Pass $ 57,497 $ 157,529 $ 103,895 $ 47,942 $ 11,616 $ 3,933 $ 32,845 $ 1,575 $ 416,832 Classified 18 99 43 36 14 2 17 29 258 Total Other $ 57,515 $ 157,628 $ 103,938 $ 47,978 $ 11,630 $ 3,935 $ 32,862 $ 1,604 $ 417,090 Total Consumer $ 1,120,048 $ 1,018,128 $ 624,328 $ 643,868 $ 652,788 $ 1,083,035 $ 1,593,114 $ 41,432 $ 6,776,741 Total Loans and Leases $ 2,750,366 $ 1,877,674 $ 1,243,476 $ 1,021,317 $ 1,026,082 $ 1,738,977 $ 2,093,169 $ 42,547 $ 11,793,608 1 Comprised of other revolving credit, installment, and lease financing. The following presents by loan class and credit quality indicator, the recorded investment in the Company’s loans and leases as of December 31, 2019. December 31, 2019 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,306,040 $ 2,463,858 $ 188,832 $ 120,933 $ 4,079,663 Special Mention 37,722 16,453 4,148 — 58,323 Classified 35,390 37,740 1,190 1,521 75,841 Total $ 1,379,152 $ 2,518,051 $ 194,170 $ 122,454 $ 4,213,827 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,886,389 $ 1,671,468 $ 719,337 $ 488,113 $ 6,765,307 Classified 4,711 4,605 949 1,493 11,758 Total $ 3,891,100 $ 1,676,073 $ 720,286 $ 489,606 $ 6,777,065 Total Recorded Investment in Loans and Leases $ 10,990,892 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 September 30, 2020, and December 31, 2019. (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 September 30, 2020 Commercial Commercial and Industrial $ 220 $ 47 $ — $ 475 $ 742 $ 1,907,740 $ 1,908,482 $ 290 Commercial Mortgage — — — 8,615 8,615 2,736,996 2,745,611 8,615 Construction — — — — — 250,943 250,943 — Lease Financing — — — — — 111,831 111,831 — Total Commercial 220 47 — 9,090 9,357 5,007,510 5,016,867 8,905 Consumer Residential Mortgage 2,695 1,583 6,607 3,543 14,428 4,029,800 4,044,228 — Home Equity 2,628 1,019 2,571 3,661 9,879 1,595,607 1,605,486 1,396 Automobile 2,769 119 156 — 3,044 706,893 709,937 — Other 1 1,856 650 258 — 2,764 414,326 417,090 — Total Consumer 9,948 3,371 9,592 7,204 30,115 6,746,626 6,776,741 1,396 Total $ 10,168 $ 3,418 $ 9,592 $ 16,294 $ 39,472 $ 11,754,136 $ 11,793,608 $ 10,301 As of December 31, 2019 Commercial Commercial and Industrial $ 12,534 $ 148 $ — $ 830 $ 13,512 $ 1,365,640 $ 1,379,152 $ 421 Commercial Mortgage 2,998 — — 9,244 12,242 2,505,809 2,518,051 9,244 Construction 101 51 — — 152 194,018 194,170 — Lease Financing 720 — — — 720 121,734 122,454 — Total Commercial 16,353 199 — 10,074 26,626 4,187,201 4,213,827 9,665 Consumer Residential Mortgage 6,097 2,070 1,839 4,125 14,131 3,876,969 3,891,100 1,429 Home Equity 3,949 2,280 4,125 3,181 13,535 1,662,538 1,676,073 412 Automobile 16,067 4,154 949 — 21,170 699,116 720,286 — Other 1 3,498 2,074 1,493 — 7,065 482,541 489,606 — Total Consumer 29,611 10,578 8,406 7,306 55,901 6,721,164 6,777,065 1,841 Total $ 45,964 $ 10,777 $ 8,406 $ 17,380 $ 82,527 $ 10,908,365 $ 10,990,892 $ 11,506 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 September 30, 2020, and December 31, 2019. September 30, 2020 December 31, 2019 (dollars in thousands) Non-accrual loans with a related ACL Non-accrual loans without a related ACL Total Non- accrual loans Total Non- accrual loans Commercial Commercial and Industrial $ 475 $ — $ 475 $ 830 Commercial Mortgage 3,544 5,071 8,615 9,244 Total Commercial 4,019 5,071 9,090 10,074 Consumer Residential Mortgage 3,202 341 3,543 4,125 Home Equity 3,661 — 3,661 3,181 Total Consumer 6,863 341 7,204 7,306 Total $ 10,882 $ 5,412 $ 16,294 $ 17,380
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 and nine months ended September 30, 2020, and September 30, 2019. Loans Modified as a TDR for the Three Months Ended September 30, 2020 Loans Modified as a TDR for the Three Months Ended September 30, 2019 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 1 $ 92 $ 1 1 $ 45 — Total Commercial 1 92 1 1 45 — Consumer Home Equity 2 134 — — — — Automobile 12 227 4 86 1,665 23 Other 2 7 93 4 14 117 3 Total Consumer 21 454 8 100 1,782 26 Total 22 $ 546 $ 9 101 $ 1,827 $ 26 Loans Modified as a TDR for the Nine Months Ended September 30, 2020 Loans Modified as a TDR for the Nine Months Ended September 30, 2019 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 3 $ 188 $ 3 5 $ 244 $ 14 Commercial Mortgage 1 1,099 — 1 3,766 — Total Commercial 4 1,287 3 6 4,010 14 Consumer Residential Mortgage — — — 1 57 — Home Equity 2 134 — 2 246 — Automobile 81 1,346 22 271 5,011 69 Other 2 42 357 15 75 459 12 Total Consumer 125 1,837 37 349 5,773 81 Total 129 $ 3,124 $ 40 355 $ 9,783 $ 95 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 and nine months ended September 30, 2020, and December 31, 2019, 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 September 30, 2020 Three Months Ended September 30, 2019 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 Residential Mortgage — — 1 $ 133 Home Equity — — 1 195 Automobile 1 6 9 126 Other 2 — — 9 72 Total Consumer 1 6 20 526 Total 1 $ 6 20 $ 526 Nine Months Ended September 30, 2020 Nine Months Ended September 30, 2019 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 Commercial Commercial and Industrial — $ — 1 $ 55 Total Commercial — — 1 55 Consumer Residential Mortgage — — 1 133 Home Equity — — 1 195 Automobile 33 591 22 326 Other 2 6 38 24 144 Total Consumer 39 629 48 798 Total 39 $ 629 49 $ 853 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)	9 Months Ended
	Sep. 30, 2020
Transfers And Servicing Of Financial Assets [Abstract]
Summary of Carrying Value Under the Fair Value Measurement Method	For the three and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Balance at Beginning of Period $ 1,068 $ 1,212 $ 1,126 $ 1,290 Change in Fair Value: Due to Payoffs (50 ) (38 ) (108 ) (116 ) Total Changes in Fair Value of Mortgage Servicing Rights (50 ) (38 ) (108 ) (116 ) Balance at End of Period $ 1,018 $ 1,174 $ 1,018 $ 1,174
Summary of Carrying Value Under the Amortization Method	For the three and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Balance at Beginning of Period $ 21,836 $ 23,021 $ 23,896 $ 23,020 Servicing Rights that Resulted From Asset Transfers 872 1,263 3,042 2,788 Amortization (1,271 ) (1,032 ) (3,684 ) (2,546 ) Valuation Allowance Recovery (Provision) (568 ) (18 ) (2,385 ) (28 ) Balance at End of Period $ 20,869 $ 23,234 $ 20,869 $ 23,234 Valuation Allowance: Balance at Beginning of Period $ (1,817 ) $ (10 ) $ — $ — Valuation Allowance Recovery (Provision) (568 ) (18 ) (2,385 ) (28 ) Balance at End of Period $ (2,385 ) $ (28 ) $ (2,385 ) $ (28 ) Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 21,836 $ 24,905 $ 25,714 $ 29,218 End of Period $ 20,870 $ 23,674 $ 20,870 $ 23,674
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 September 30, 2020, and December 31, 2019, were as follows: September 30, 2020 December 31, 2019 Weighted-Average Constant Prepayment Rate 1 14.07 % 10.76 % Weighted-Average Life (in years) 5.09 6.20 Weighted-Average Note Rate 3.90 % 3.99 % Weighted-Average Discount Rate 2 5.88 % 7.33 % 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 September 30, 2020, and December 31, 2019, is presented in the following table. (dollars in thousands) September 30, 2020 December 31, 2019 Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (228 ) $ (296 ) Decrease in fair value from 50 bps adverse change (452 ) (586 ) Discount Rate Decrease in fair value from 25 bps adverse change (205 ) (264 ) Decrease in fair value from 50 bps adverse change (406 ) (522 )

Affordable Housing Projects T_2

Affordable Housing Projects Tax Credit Partnerships (Tables)	9 Months Ended
	Sep. 30, 2020
Equity Method Investments And Joint Ventures [Abstract]
Payments for Unfunded Affordable Housing Commitments	As of September 30, 2020, the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2020 $ 12,820 2021 10,283 2022 6,026 2023 6,059 2024 58 Thereafter 3,772 Total Unfunded Commitments $ 39,018 The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three and nine months ended September 30, 2020, and September 30, 2019. Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Effective Yield Method Tax credits and other tax benefits recognized $ 2,938 $ 2,930 $ 8,814 $ 8,789 Amortization Expense in Provision for Income Taxes 2,347 1,891 7,042 5,674 Proportional Amortization Method Tax credits and other tax benefits recognized $ 1,794 $ 753 $ 4,839 $ 2,260 Amortization Expense in Provision for Income Taxes 1,345 645 3,580 1,934

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019, 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 September 30, 2020 Class of Collateral Pledged: Debt Securities Issued by States and Political Subdivisions $ — $ 100 $ — $ 490.0 $ 590.0 Mortgage-Backed Securities: Residential - Government Agencies 1,516 — 22,158 93,933 117,607 Residential - U.S. Government-Sponsored Enterprises — — 2,842 481,067 483,909 Total $ 1,516 $ 100 $ 25,000 $ 575,490 $ 602,106 December 31, 2019 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 199,173 $ 38,065 $ 237,238 Debt Securities Issued by States and Political Subdivisions 1,200 1,100 — 490 2,790 Mortgage-Backed Securities: Residential - Government Agencies — 1,516 25,827 88,391 115,734 Residential - U.S. Government-Sponsored Enterprises — — — 248,544 248,544 Total $ 1,200 $ 2,616 $ 225,000 $ 375,490 $ 604,306
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 September 30, 2020, and December 31, 2019. 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 September 30, 2020 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 5 $ — $ 5 $ 5 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 19,161 — 19,161 5 8,962 10,194 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 2,106 — 2,106 — 2,106 — $ 602,106 $ — $ 602,106 $ — $ 602,106 $ — December 31, 2019 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 584 $ — $ 584 $ 584 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 5,361 — 5,361 584 3,818 959 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 4,306 — 4,306 — 4,306 — $ 604,306 $ — $ 604,306 $ — $ 604,306 $ — 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 $634.6 million and $645.3 million as of September 30, 2020, and December 31, 2019, respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $4.3 million and $5.5 million as of September 30, 2020, and December 31, 2019, respectively.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019: (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (6,771 ) $ (1,795 ) $ (4,976 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 104 28 76 Net Unrealized Gains (Losses) on Investment Securities (6,667 ) (1,767 ) (4,900 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 570 151 419 Amortization of Prior Service Credit (61 ) (16 ) (45 ) Defined Benefit Plans, Net 509 135 374 Other Comprehensive Income (Loss) $ (6,158 ) $ (1,632 ) $ (4,526 ) Three Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 7,314 $ 1,938 $ 5,376 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 39 10 29 Net Unrealized Gains (Losses) on Investment Securities 7,353 1,948 5,405 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 406 108 298 Amortization of Prior Service Credit (72 ) (19 ) (53 ) Defined Benefit Plans, Net 334 89 245 Other Comprehensive Income (Loss) $ 7,687 $ 2,037 $ 5,650 Nine Months Ended September 30, 2020 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 60,177 $ 15,945 $ 44,232 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 1 289 76 213 Net Unrealized Gains (Losses) on Investment Securities 60,389 16,000 44,389 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,711 454 1,257 Amortization of Prior Service Credit (184 ) (49 ) (135 ) Defined Benefit Plans, Net 1,527 405 1,122 Other Comprehensive Income (Loss) $ 61,916 $ 16,405 $ 45,511 Nine Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 38,077 $ 10,090 $ 27,987 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (63 ) (17 ) (46 ) Amortization of Unrealized Holding (Gains) Losses on Held-to- Maturity Securities 1 804 212 592 Net Unrealized Gains (Losses) on Investment Securities 38,818 10,285 28,533 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,218 323 895 Amortization of Prior Service Credit (216 ) (57 ) (159 ) Defined Benefit Plans, Net 1,002 266 736 Other Comprehensive Income (Loss) $ 39,820 $ 10,551 $ 29,269 1
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 and nine months ended September 30, 2020, and September 30, 2019: (dollars in thousands) Investment Securities- Available- for-Sale Investment Securities- Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended September 30, 2020 Balance at Beginning of Period $ 57,511 $ (578 ) $ (38,008 ) $ 18,925 Other Comprehensive Income (Loss) Before Reclassifications (4,976 ) — — (4,976 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 76 374 450 Total Other Comprehensive Income (Loss) (4,976 ) 76 374 (4,526 ) Balance at End of Period $ 52,535 $ (502 ) $ (37,634 ) $ 14,399 Three Months Ended September 30, 2019 Balance at Beginning of Period $ 8,859 $ (764 ) $ (35,519 ) $ (27,424 ) Other Comprehensive Income (Loss) Before Reclassifications 5,376 — — 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 29 245 274 Total Other Comprehensive Income (Loss) 5,376 29 245 5,650 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Nine Months Ended September 30, 2020 Balance at Beginning of Period $ 8,359 $ (715 ) $ (38,756 ) $ (31,112 ) Other Comprehensive Income (Loss) Before Reclassifications 44,232 — — 44,232 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (56 ) 213 1,122 1,279 Total Other Comprehensive Income (Loss) 44,176 213 1,122 45,511 Balance at End of Period $ 52,535 $ (502 ) $ (37,634 ) $ 14,399 Nine Months Ended September 30, 2019 Balance at Beginning of Period $ (10,447 ) $ (4,586 ) $ (36,010 ) $ (51,043 ) Other Comprehensive Income (Loss) Before Reclassifications 27,987 — — 27,987 Transfers (3,259 ) 3,259 — — Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (46 ) 592 736 1,282 Total Other Comprehensive Income (Loss) 24,682 3,851 736 29,269 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 )
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 and nine months ended September 30, 2020, and September 30, 2019: 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 September 30, (dollars in thousands) 2020 2019 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (103 ) $ (39 ) Interest Income 27 10 Provision for Income Tax (76 ) (29 ) Net of Tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 62 72 Net Actuarial Losses 2 (571 ) (406 ) (509 ) (334 ) Total Before Tax 135 89 Provision for Income Tax (374 ) (245 ) Net of Tax Total Reclassifications for the Period $ (450 ) $ (274 ) Net of Tax 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 Nine Months Ended September 30, (dollars in thousands) 2020 2019 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (289 ) $ (804 ) Interest Income 76 212 Provision for Income Tax (213 ) (592 ) Net of Tax Sale of Investment Securities Available-for-Sale 77 63 Investment Securities Gains (Losses), Net (21 ) (17 ) Provision for Income Tax 56 46 Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 185 216 Net Actuarial Losses 2 (1,712 ) (1,218 ) (1,527 ) (1,002 ) Total Before Tax 405 266 Provision for Income Tax (1,122 ) (736 ) Net of Tax Total Reclassifications for the Period $ (1,279 ) $ (1,282 ) Net of Tax 1 2 Pension Plans and Postretirement Benefit Plan

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Denominator for Basic Earnings Per Share 39,745,120 40,190,508 39,710,252 40,554,036 Dilutive Effect of Equity Based Awards 124,015 260,234 162,154 252,259 Denominator for Diluted Earnings Per Share 39,869,135 40,450,742 39,872,406 40,806,295 Antidilutive Stock Options and Restricted Stock Outstanding 108,207 — 106,140 2,399

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Selected Business Segment Financial Information	Selected business segment financial information as of and for the three and nine months ended September 30, 2020, and September 30, 2019, were as follows: (dollars in thousands) Consumer Banking Commercial Banking Treasury and Other Consolidated Total Three Months Ended September 30, 2020 Net Interest Income $ 73,868 $ 47,797 $ 2,501 $ 124,166 Provision for Credit Losses (1,372 ) (85 ) 30,057 28,600 Net Interest Income After Provision for Credit Losses 75,240 47,882 (27,556 ) 95,566 Noninterest Income 31,776 7,672 2,286 41,734 Noninterest Expense (69,408 ) (15,430 ) (5,111 ) (89,949 ) Income Before Provision for Income Taxes 37,608 40,124 (30,381 ) 47,351 Provision for Income Taxes (9,627 ) (9,784 ) 9,900 (9,511 ) Net Income $ 27,981 $ 30,340 $ (20,481 ) $ 37,840 Total Assets as of September 30, 2020 $ 7,383,822 $ 5,027,836 $ 7,697,831 $ 20,109,489 Three Months Ended September 30, 2019 1 Net Interest Income $ 76,289 $ 46,791 $ 1,816 $ 124,896 Provision for Credit Losses 3,116 (130 ) 1,264 4,250 Net Interest Income After Provision for Credit Losses 73,173 46,921 552 120,646 Noninterest Income 36,627 8,739 1,141 46,507 Noninterest Expense (75,198 ) (21,330 ) (3,821 ) (100,349 ) Income Before Provision for Income Taxes 34,602 34,330 (2,128 ) 66,804 Provision for Income Taxes (8,506 ) (8,560 ) 2,314 (14,752 ) Net Income $ 26,096 $ 25,770 $ 186 $ 52,052 Total Assets as of September 30, 2019 1 $ 6,993,290 $ 4,145,717 $ 6,533,133 $ 17,672,140 Nine Months Ended September 30, 2020 1 Net Interest Income $ 221,003 $ 144,253 $ 11,567 $ 376,823 Provision for Credit Losses 8,215 (819 ) 95,204 102,600 Net Interest Income After Provision for Credit Losses 212,788 145,072 (83,637 ) 274,223 Noninterest Income 93,309 26,483 19,359 139,151 Noninterest Expense (210,744 ) (47,552 ) (16,857 ) (275,153 ) Income Before Provision for Income Taxes 95,353 124,003 (81,135 ) 138,221 Provision for Income Taxes (24,235 ) (30,278 ) 27,782 (26,731 ) Net Income $ 71,118 $ 93,725 $ (53,353 ) $ 111,490 Total Assets as of September 30, 2020 $ 7,383,822 $ 5,027,836 $ 7,697,831 $ 20,109,489 Nine Months Ended September 30, 2019 1 Net Interest Income $ 229,704 $ 139,784 $ 4,342 $ 373,830 Provision for Credit Losses 7,866 1,141 2,243 11,250 Net Interest Income After Provision for Credit Losses 221,838 138,643 2,099 362,580 Noninterest Income 107,072 22,738 5,826 135,636 Noninterest Expense (213,168 ) (63,545 ) (9,418 ) (286,131 ) Income Before Provision for Income Taxes 115,742 97,836 (1,493 ) 212,085 Provision for Income Taxes (28,745 ) (22,507 ) 6,937 (44,315 ) Net Income $ 86,997 $ 75,329 $ 5,444 $ 167,770 Total Assets as of September 30, 2019 1 $ 6,993,290 $ 4,145,717 $ 6,533,133 $ 17,672,140 1 Certain prior period information has been reclassified to conform to current presentation.

Pension Plans and Postretirem_2

Pension Plans and Postretirement Benefit Plan (Tables)	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, and September 30, 2019. Pension Benefits Postretirement Benefits (dollars in thousands) 2020 2019 2020 2019 Three Months Ended September 30, Service Cost $ — $ — $ 152 $ 117 Interest Cost 900 1,093 230 257 Expected Return on Plan Assets (1,258 ) (1,249 ) — — Amortization of: Prior Service Credit — — (61 ) (72 ) Net Actuarial Losses (Gains) 570 484 — (78 ) Net Periodic Benefit Cost $ 212 $ 328 $ 321 $ 224 Nine Months Ended September 30, Service Cost $ — $ — $ 454 $ 235 Interest Cost 2,699 2,187 694 515 Expected Return on Plan Assets (3,773 ) (2,498 ) — — Amortization of: Prior Service Credit — — (184 ) (144 ) Net Actuarial Losses (Gains) 1,711 968 — (156 ) Net Periodic Benefit Cost $ 637 $ 657 $ 964 $ 450

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019, were as follows: September 30, 2020 December 31, 2019 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 63,895 $ 3,316 $ 48,677 $ 1,280 Forward Commitments 62,492 (215 ) 82,735 (182 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 1,275,732 103,662 802,389 26,070 Pay Fixed/Receive Variable Swaps 1,275,732 (19,156 ) 802,389 (4,777 ) Foreign Exchange Contracts 98,173 213 85,499 163 Conversion Rate Swap Agreement 121,854 — 114,499 —
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 September 30, 2020, and December 31, 2019: Derivative Financial Instruments September 30, 2020 December 31, 2019 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 3,316 $ — $ 1,280 $ — Forward Commitments 9 224 23 205 Interest Rate Swap Agreements 103,671 19,165 27,344 6,051 Foreign Exchange Contracts 353 140 284 121 Total $ 107,349 $ 19,529 $ 28,931 $ 6,377 1
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 and nine months ended September 30, 2020, and September 30, 2019: Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Nine Months Ended Not Designated as Hedging Instruments Recognized in the September 30, September 30, (dollars in thousands) Statements of Income 2020 2019 2020 2019 Interest Rate Lock Commitments Mortgage Banking $ 4,903 $ 4,381 $ 15,556 $ 9,667 Forward Commitments Mortgage Banking (595 ) (282 ) (3,652 ) (2,257 ) Interest Rate Swap Agreements Other Noninterest Income 2,575 2,967 12,041 5,863 Foreign Exchange Contracts Other Noninterest Income 467 480 1,403 2,546 Conversion Rate Swap Agreement Investment Securities Gains (Losses), Net — (453 ) — (453 ) Total $ 7,350 $ 7,093 $ 25,348 $ 15,366

Commitments, Contingencies, a_2

Commitments, Contingencies, and Guarantees (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Credit Commitments	The Company’s credit commitments as of September 30, 2020, and December 31, 2019, were as follows: (dollars in thousands) September 30, 2020 December 31, 2019 Unfunded Commitments to Extend Credit $ 2,774,751 $ 2,713,937 Standby Letters of Credit 104,695 81,000 Commercial Letters of Credit 12,394 16,981 Total Credit Commitments $ 2,891,840 $ 2,811,918

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, and December 31, 2019: 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 September 30, 2020 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,111 $ 180,334 $ — $ 181,445 Debt Securities Issued by States and Political Subdivisions — 46,803 — 46,803 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 1,016 — 1,016 Debt Securities Issued by Corporations — 224,454 — 224,454 Mortgage-Backed Securities: Residential - Government Agencies — 1,520,502 — 1,520,502 Residential - U.S. Government-Sponsored Enterprises — 937,068 — 937,068 Commercial - Government Agencies — 279,025 — 279,025 Total Mortgage-Backed Securities — 2,736,595 — 2,736,595 Total Investment Securities Available-for-Sale 1,111 3,189,202 — 3,190,313 Mortgage Servicing Rights — — 1,018 1,018 Other Assets 48,184 — — 48,184 Derivatives 1 — 362 106,987 107,349 Total Assets Measured at Fair Value on a Recurring Basis as of September 30, 2020 $ 49,295 $ 3,189,564 $ 108,005 $ 3,346,864 Liabilities: Derivatives 1 $ — $ 364 $ 19,165 $ 19,529 Total Liabilities Measured at Fair Value on a Recurring Basis as of September 30, 2020 $ — $ 364 $ 19,165 $ 19,529 December 31, 2019 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,155 $ 219,976 $ — $ 221,131 Debt Securities Issued by States and Political Subdivisions — 55,097 — 55,097 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 22,147 — 22,147 Debt Securities Issued by Corporations — 336,321 — 336,321 Mortgage-Backed Securities: Residential - Government Agencies — 1,172,826 — 1,172,826 Residential - U.S. Government-Sponsored Enterprises — 586,761 — 586,761 Commercial - Government Agencies — 224,720 — 224,720 Total Mortgage-Backed Securities — 1,984,307 — 1,984,307 Total Investment Securities Available-for-Sale 1,155 2,617,848 — 2,619,003 Loans Held for Sale — 39,062 — 39,062 Mortgage Servicing Rights — — 1,126 1,126 Other Assets 41,464 — — 41,464 Derivatives 1 — 308 28,623 28,931 Total Assets Measured at Fair Value on a Recurring Basis as of December 31, 2019 $ 42,619 $ 2,657,218 $ 29,749 $ 2,729,586 Liabilities: Derivatives 1 $ — $ 327 $ 6,050 $ 6,377 Total Liabilities Measured at Fair Value on a Recurring Basis as of December 31, 2019 $ — $ 327 $ 6,050 $ 6,377 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 and nine months ended September 30, 2020, and September 30, 2019, 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 September 30, 2020 Balance as of July 1, 2020 $ 1,068 $ 88,995 Realized and Unrealized Net Gains (Losses): Included in Net Income (50 ) 4,909 Transfers to Loans Held for Sale — (4,242 ) Variation Margin Payments — (1,840 ) Balance as of September 30, 2020 $ 1,018 $ 87,822 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2020 $ — $ 87,822 Three Months Ended September 30, 2019 Balance as of July 1, 2019 $ 1,212 $ 19,956 Realized and Unrealized Net Gains (Losses): Included in Net Income (38 ) 4,360 Transfers to Loans Held for Sale — (3,736 ) Variation Margin Payments — 11,331 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2019 $ — $ 31,911 Nine Months Ended September 30, 2020 Balance as of January 1, 2020 $ 1,126 22,573 Realized and Unrealized Net Gains (Losses): Net (108 ) 15,372 Transfers to Loans Held for Sale — (13,521 ) Variation Margin Payments — 63,398 Balance as of September 30, 2020 $ 1,018 87,822 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2020 $ — $ 87,822 Nine Months Ended September 30, 2019 Balance as of January 1, 2019 $ 1,290 $ 4,416 Realized and Unrealized Net Gains (Losses): Included in Net Income (116 ) 9,602 Transfers to Loans Held for Sale — (7,750 ) Variation Margin Payments — 25,643 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held as of September 30, 2019 $ — $ 31,911 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 September 30, 2020, and December 31, 2019, the significant unobservable inputs used in the fair value measurements were as follows: September 30, 2020 December 31, 2019 (dollars in thousands) Valuation Technique Description Range Weighted Average 1 Fair Value Weighted Average 1 Fair Value Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 8.67% - 14.77 % 14.07 % $ 21,888 10.76 % $ 26,840 Discount Rate 5.86% - 6.35 % 5.88 % 7.33 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 75.40% - 99.00 % 91.03 % $ 3,316 92.24 % $ 1,280 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.00% - 0.49 % 0.32 % $ 84,506 0.20 % $ 21,293 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 September 30, 2020. There were no assets measured at fair value on a nonrecurring basis as of December 31, 2019. (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance September 30, 2020 Mortgage Servicing Rights - amortization method Level 3 $ 20,870 $ (2,385 )
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 December 31, 2019. There were no loans held for sale as of September 30, 2020. (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal December 31, 2019 Loans Held for Sale $ 39,062 $ 38,293 $ 769
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 September 30, 2020, and December 31, 2019. 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) September 30, 2020 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,198,830 $ 3,288,668 $ 62,714 $ 3,225,954 $ — Loans 1 11,397,713 12,009,113 — — 12,009,113 Financial Instruments - Liabilities Time Deposits 1,721,977 1,729,433 — 1,729,433 — Securities Sold Under Agreements to Repurchase 602,106 654,283 — 654,283 — Other Debt 2 50,000 51,648 — 51,648 — December 31, 2019 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,042,294 $ 3,062,882 $ 275,663 $ 2,787,219 $ — Loans 1 10,664,885 10,873,208 — — 10,873,208 Financial Instruments - Liabilities Time Deposits 1,802,431 1,800,773 — 1,800,773 — Securities Sold Under Agreements to Repurchase 604,306 627,780 — 627,780 — Other Debt 2 75,000 75,581 — 75,581 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes finance lease obligations.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Summary of Noninterest Income Segregated by Revenue Streams In-Scope and Out-of-Scope of Topic 606	The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2020, and September 30, 2019. Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2020 2019 2020 2019 Noninterest Income In-scope of Topic 606: Trust and Asset Management $ 10,752 $ 10,930 $ 32,217 $ 33,076 Service Charges on Deposit Accounts 3,000 3,268 8,770 9,912 Fees, Exchange, and Other Service Charges 9,130 11,705 26,489 34,859 Annuity and Insurance 855 1,251 2,605 5,567 Other 2,131 2,224 6,697 7,200 Noninterest Income (in-scope of Topic 606) 25,868 29,378 76,778 90,614 Noninterest Income (out-of-scope of Topic 606) 15,866 17,129 62,373 45,022 Total Noninterest Income $ 41,734 $ 46,507 $ 139,151 $ 135,636

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Variable Interest Entity [Line Items]
Unfunded commitments to fund low-income housing partnerships		$ 39,018
Variable interest entity, nonconsolidated, carrying amount, assets		20,109,489	$ 18,095,496	$ 17,672,140
CARES Act estimated provision for relief measures		2,200,000,000
Accounting Standards Update 2016-13
Variable Interest Entity [Line Items]
Total reserve for credit losses			116,849
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment
Variable Interest Entity [Line Items]
Total reserve for credit losses	$ (5,072)
Increase to retained earnings	$ 3,632
Other Liabilities
Variable Interest Entity [Line Items]
Unfunded commitments to fund low-income housing partnerships		39,000	21,300
Other Assets | Variable Interest Entity Nonconsolidated
Variable Interest Entity [Line Items]
Variable interest entity, nonconsolidated, carrying amount, assets		$ 123,600	$ 84,600
Low-income Housing Partnerships
Variable Interest Entity [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
Variable Interest Entity [Line Items]
Period over which Federal tax credits or benefits are generally recognized (in years)		6 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Schedule of Allowance for Credit Losses Upon Adoption of ASU 2016-13 (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses		$ 203,496	$ 173,439		$ 108,936	$ 107,672	$ 106,693
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses				$ 110,027
Reserve for Unfunded Commitments				6,822
Total Reserve for Credit Losses				116,849
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	$ (1,737)			(1,737)
Reserve for Unfunded Commitments	(3,335)
Total Reserve for Credit Losses	(5,072)
Retained Earnings
Total Pre-tax Impact	5,072
Tax Effect	(1,440)
Increase to Retained Earnings	3,632
Accounting Standards Update 2016-13 | January 1, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	108,290			108,290
Reserve for Unfunded Commitments	3,487
Total Reserve for Credit Losses	111,777
Accounting Standards Update 2016-13 | Commercial Loan
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses				73,801
Accounting Standards Update 2016-13 | Commercial Loan | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	(18,789)
Accounting Standards Update 2016-13 | Commercial Loan | January 1, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	55,012
Accounting Standards Update 2016-13 | Consumer Loan
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses				$ 36,226
Accounting Standards Update 2016-13 | Consumer Loan | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	17,052
Accounting Standards Update 2016-13 | Consumer Loan | January 1, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowance for Credit Losses	$ 53,278

Cash and Cash Equivalents - Sch

Cash and Cash Equivalents - Schedule of Reconciliation of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Cash And Cash Equivalents [Abstract]
Interest-Bearing Deposits in Other Banks	$ 4,233	$ 4,979
Funds Sold	736,524	254,574
Cash and Due From Banks	260,167	299,105
Total Cash and Cash Equivalents	$ 1,000,924	$ 558,658

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-Sale:
Available-for-Sale: Amortized Cost	$ 3,118,846	$ 2,607,636
Available-for-Sale: Gross Unrealized Gains	75,199	21,143
Available-for-Sale: Gross Unrealized Losses	(3,732)	(9,776)
Available-for-Sale: Fair Value	3,190,313	2,619,003
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	3,198,830	3,042,294
Held-to-Maturity: Gross Unrealized Gains	90,073	29,990
Held-to-Maturity: Gross Unrealized Losses	(235)	(9,402)
Held-to-Maturity: Fair Value	3,288,668	3,062,882
Debt Securities Issued by the U.S. Treasury and Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	182,605	222,365
Available-for-Sale: Gross Unrealized Gains	245	213
Available-for-Sale: Gross Unrealized Losses	(1,405)	(1,447)
Available-for-Sale: Fair Value	181,445	221,131
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	62,505	274,375
Held-to-Maturity: Gross Unrealized Gains	211	1,319
Held-to-Maturity: Gross Unrealized Losses	(2)	(31)
Held-to-Maturity: Fair Value	62,714	275,663
Debt Securities Issued by States and Political Subdivisions
Available-for-Sale:
Available-for-Sale: Amortized Cost	45,313	54,480
Available-for-Sale: Gross Unrealized Gains	1,491	631
Available-for-Sale: Gross Unrealized Losses	(1)	(14)
Available-for-Sale: Fair Value	46,803	55,097
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	54,001	54,811
Held-to-Maturity: Gross Unrealized Gains	1,022	1,236
Held-to-Maturity: Gross Unrealized Losses	0	0
Held-to-Maturity: Fair Value	55,023	56,047
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	937	22,128
Available-for-Sale: Gross Unrealized Gains	79	19
Available-for-Sale: Gross Unrealized Losses	0	0
Available-for-Sale: Fair Value	1,016	22,147
Debt Securities Issued by Corporations
Available-for-Sale:
Available-for-Sale: Amortized Cost	221,935	335,553
Available-for-Sale: Gross Unrealized Gains	4,273	1,401
Available-for-Sale: Gross Unrealized Losses	(1,754)	(633)
Available-for-Sale: Fair Value	224,454	336,321
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	12,770	14,975
Held-to-Maturity: Gross Unrealized Gains	279	0
Held-to-Maturity: Gross Unrealized Losses	0	(138)
Held-to-Maturity: Fair Value	13,049	14,837
Residential - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,483,465	1,164,466
Available-for-Sale: Gross Unrealized Gains	37,344	11,627
Available-for-Sale: Gross Unrealized Losses	(307)	(3,267)
Available-for-Sale: Fair Value	1,520,502	1,172,826
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	792,360	1,067,416
Held-to-Maturity: Gross Unrealized Gains	33,324	13,247
Held-to-Maturity: Gross Unrealized Losses	(19)	(5,348)
Held-to-Maturity: Fair Value	825,665	1,075,315
Residential - U.S. Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	917,366	584,272
Available-for-Sale: Gross Unrealized Gains	19,904	4,363
Available-for-Sale: Gross Unrealized Losses	(202)	(1,874)
Available-for-Sale: Fair Value	937,068	586,761
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	2,184,472	1,546,479
Held-to-Maturity: Gross Unrealized Gains	52,270	13,871
Held-to-Maturity: Gross Unrealized Losses	(121)	(2,478)
Held-to-Maturity: Fair Value	2,236,621	1,557,872
Commercial - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	267,225	224,372
Available-for-Sale: Gross Unrealized Gains	11,863	2,889
Available-for-Sale: Gross Unrealized Losses	(63)	(2,541)
Available-for-Sale: Fair Value	279,025	224,720
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	92,722	84,238
Held-to-Maturity: Gross Unrealized Gains	2,967	317
Held-to-Maturity: Gross Unrealized Losses	(93)	(1,407)
Held-to-Maturity: Fair Value	95,596	83,148
Mortgage-Backed Securities
Available-for-Sale:
Available-for-Sale: Amortized Cost	2,668,056	1,973,110
Available-for-Sale: Gross Unrealized Gains	69,111	18,879
Available-for-Sale: Gross Unrealized Losses	(572)	(7,682)
Available-for-Sale: Fair Value	2,736,595	1,984,307
Held-to-Maturity:
Held-to-Maturity: Amortized Cost	3,069,554	2,698,133
Held-to-Maturity: Gross Unrealized Gains	88,561	27,435
Held-to-Maturity: Gross Unrealized Losses	(233)	(9,233)
Held-to-Maturity: Fair Value	$ 3,157,882	$ 2,716,335

Investment Securities - Additio

Investment Securities - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)securityshares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Accrued Interest Receivable			$ 57,370		$ 46,476
Carrying value of investment securities which were pledged to secure deposits of government entities and repos			$ 3,800,000		2,600,000
Number of available for sale securities in unrealized loss positions | security			84
Gross Gains on Sales of Investment Securities		$ 38	$ 14,257	$ 7,701
Visa Conversion Rate Swap Agreement
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	80,214		0
Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Accrued Interest Receivable			$ 6,400		7,500
Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Accrued Interest Receivable			$ 8,200		$ 8,100

Investment Securities - Analysi

Investment Securities - Analysis of the Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Rolling Maturity[Abstract]
Due in One Year or Less	$ 61,913
Due After One Year Through Five Years	59,080
Due After Five Years Through Ten Years	148,282
Amortized Cost, Total	269,275
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-Sale: Amortized Cost	3,118,846
Due in One Year or Less	61,802
Due After One Year Through Five Years	60,281
Due After Five Years Through Ten Years	151,301
Fair Value, Total	273,384
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	2,736,595
Available-for-Sale: Fair Value	3,190,313
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Rolling Maturities (Abstract]
Due in One Year or Less	80,075
Due After One Year Through Five Years	49,201
Amortized Cost, Total	129,276
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Due in One Year or Less	80,356
Due After One Year Through Five Years	50,430
Fair Value, Total	130,786
Held-to-Maturity: Amortized Cost	3,198,830
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	3,157,882
Held-to-Maturity: Fair Value	3,288,668	$ 3,062,882
Debt Securities Issued by Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	181,515
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	180,334
Residential - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	1,483,465
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,520,502
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	792,360
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	825,665
Held-to-Maturity: Fair Value	825,665	1,075,315
Residential - U.S. Government-Sponsored Enterprises
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	917,366
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	937,068
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	2,184,472
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	2,236,621
Held-to-Maturity: Fair Value	2,236,621	1,557,872
Commercial - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	267,225
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	279,025
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	92,722
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	95,596
Held-to-Maturity: Fair Value	95,596	83,148
Mortgage-Backed Securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	2,668,056
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	3,069,554
Held-to-Maturity: Fair Value	$ 3,157,882	$ 2,716,335

Investment Securities - Sched_2

Investment Securities - Schedule of Gains and Losses From Sales of Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Gross Gains on Sales of Investment Securities		$ 38	$ 14,257	$ 7,701
Gross Losses on Sales of Investment Securities	$ (1,121)	(1,507)	(3,132)	(10,781)
Net Gains (Losses) on Sales of Investment Securities	$ (1,121)	$ (1,469)	$ 11,125	$ (3,080)

Investment Securities - Sched_3

Investment Securities - Schedule of AFS Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 239,404	$ 465,117
Less Than 12 Months, Gross Unrealized Losses	(2,229)	(2,189)
12 Months or Longer, Fair Value	347,473	474,384
12 Months or Longer, Gross Unrealized Losses	(1,503)	(7,587)
Total Fair Value	586,877	939,501
Total Gross Unrealized Losses	(3,732)	(9,776)
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	134,162	65,479
Less Than 12 Months, Gross Unrealized Losses	(1,363)	(188)
12 Months or Longer, Fair Value	24,886	101,761
12 Months or Longer, Gross Unrealized Losses	(42)	(1,259)
Total Fair Value	159,048	167,240
Total Gross Unrealized Losses	(1,405)	(1,447)
Debt Securities Issued by States and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	26	6,788
Less Than 12 Months, Gross Unrealized Losses	(1)	(14)
12 Months or Longer, Fair Value	60	440
12 Months or Longer, Gross Unrealized Losses	0	0
Total Fair Value	86	7,228
Total Gross Unrealized Losses	(1)	(14)
Debt Securities Issued by Corporations
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	75,000	25,892
Less Than 12 Months, Gross Unrealized Losses	(642)	(326)
12 Months or Longer, Fair Value	65,000	74,693
12 Months or Longer, Gross Unrealized Losses	(1,112)	(307)
Total Fair Value	140,000	100,585
Total Gross Unrealized Losses	(1,754)	(633)
Residential - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	30,216	119,271
Less Than 12 Months, Gross Unrealized Losses	(223)	(526)
12 Months or Longer, Fair Value	136,396	170,805
12 Months or Longer, Gross Unrealized Losses	(84)	(2,741)
Total Fair Value	166,612	290,076
Total Gross Unrealized Losses	(307)	(3,267)
Residential - U.S. Government-Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	0	187,861
Less Than 12 Months, Gross Unrealized Losses	0	(816)
12 Months or Longer, Fair Value	95,943	73,720
12 Months or Longer, Gross Unrealized Losses	(202)	(1,058)
Total Fair Value	95,943	261,581
Total Gross Unrealized Losses	(202)	(1,874)
Commercial - Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	0	59,826
Less Than 12 Months, Gross Unrealized Losses	0	(319)
12 Months or Longer, Fair Value	25,188	52,965
12 Months or Longer, Gross Unrealized Losses	(63)	(2,222)
Total Fair Value	25,188	112,791
Total Gross Unrealized Losses	(63)	(2,541)
Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months, Fair Value	30,216	366,958
Less Than 12 Months, Gross Unrealized Losses	(223)	(1,661)
12 Months or Longer, Fair Value	257,527	297,490
12 Months or Longer, Gross Unrealized Losses	(349)	(6,021)
Total Fair Value	287,743	664,448
Total Gross Unrealized Losses	$ (572)	$ (7,682)

Investment Securities - Sched_4

Investment Securities - Schedule of Interest Income From Taxable and Non-Taxable Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Taxable	$ 30,027	$ 35,584	$ 96,150	$ 102,912
Non-Taxable	498	724	1,637	5,970
Total Interest Income from Investment Securities	$ 30,525	$ 36,308	$ 97,787	$ 108,882

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	Sep. 30, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Federal Home Loan Bank Stock	$ 15,174	$ 13,000
Federal Reserve Bank Stock	18,123	21,093
Total	$ 33,297	$ 34,093

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	Sep. 30, 2020	Dec. 31, 2019
Loan and lease portfolio
Loans and Leases	$ 11,793,608	$ 10,990,892
Commercial
Loan and lease portfolio
Loans and Leases	5,016,867	4,213,827
Commercial | Commercial and Industrial
Loan and lease portfolio
Loans and Leases	1,908,482	1,379,152
Commercial | Commercial Mortgage
Loan and lease portfolio
Loans and Leases	2,745,611	2,518,051
Commercial | Construction
Loan and lease portfolio
Loans and Leases	250,943	194,170
Commercial | Lease Financing
Loan and lease portfolio
Loans and Leases	111,831	122,454
Consumer
Loan and lease portfolio
Loans and Leases	6,776,741	6,777,065
Consumer | Other
Loan and lease portfolio
Loans and Leases	417,090	489,606
Consumer | Residential Mortgage
Loan and lease portfolio
Loans and Leases	4,044,228	3,891,100
Consumer | Home Equity
Loan and lease portfolio
Loans and Leases	1,605,486	1,676,073
Consumer | Automobile
Loan and lease portfolio
Loans and Leases	$ 709,937	$ 720,286

Loans and Leases and the Allo_4

Loans and Leases and the Allowance for Credit Losses - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)Loan	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Loan	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Loan and lease portfolio
Net gains related to sales of residential mortgage loans	$ 3,400,000	$ 2,500,000	$ 9,000,000	$ 4,100,000
Accrued interest receivable	$ 57,370,000		$ 57,370,000		$ 46,476,000
Number of paycheck protection loans | Loan	4,504		4,504
Revolving loans, converted to term loan during the period			$ 1,500,000
Number of days non-accrual loans are not past due			30 days
Recorded Investment	$ 63,000,000		$ 63,000,000		69,100,000
Available commitments to lend additional funds on loans modified as TDR			200,000		300,000
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 1,100,000		$ 1,100,000
Consumer
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 | Loan	16,104		16,104
Loan and lease modifications, amount - COVID-19	$ 691,200,000		$ 691,200,000
Commercial
Loan and lease portfolio
Number of loan and lease concessions - COVID-19 | Loan	674		674
Loan and lease modifications, amount - COVID-19	$ 836,700,000		$ 836,700,000
Classified
Loan and lease portfolio
Number of months up to which residential and home equity loans may be considered classified, even if they are current as to principal and interest			6 months
Classified | 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
Accounting Standards Update 2016-13 | CECL Adoption Impact
Loan and lease portfolio
Additional decrease in cumulative adjustment	1,700,000		$ 1,700,000
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 [Member]
Loan and lease portfolio
Maximum borrowing capacity under paycheck protection program loan	$ 10,000,000		$ 10,000,000
Loans interest rate	1.00%		1.00%
Long-term debt, gross	$ 544,500,000		$ 544,500,000
PPP Loans, Administered by the SBA [Member] | Minimum
Loan and lease portfolio
Loans maturity period			2 years
PPP Loans, Administered by the SBA [Member] | Maximum
Loan and lease portfolio
Loans maturity period			5 years
PPP Loan Processing Fees Threshold One
Loan and lease portfolio
Percentage of processing fees by SBA			5.00%
PPP Loan Processing Fees Threshold One | Maximum
Loan and lease portfolio
Processing fee payment threshold limit of loan amount	350,000		$ 350,000
PPP Loan Processing Fees Threshold Two
Loan and lease portfolio
Percentage of processing fees by SBA			3.00%
PPP Loan Processing Fees Threshold Two | Minimum
Loan and lease portfolio
Processing fee payment threshold limit of loan amount	350,000		$ 350,000
PPP Loan Processing Fees Threshold Two | Maximum
Loan and lease portfolio
Processing fee payment threshold limit of loan amount	2,000,000		$ 2,000,000
PPP Loan Processing Fees Threshold Three
Loan and lease portfolio
Percentage of processing fees by SBA			1.00%
PPP Loan Processing Fees Threshold Three | Minimum
Loan and lease portfolio
Processing fee payment threshold limit of loan amount	2,000,000		$ 2,000,000
Accrued Interest Receivable
Loan and lease portfolio
Accrued interest receivable	$ 42,700,000		$ 42,700,000		$ 30,700,000

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	$ 173,439	$ 107,672		$ 106,693
Loans and Leases Charged-Off	(2,347)	(5,755)	$ (17,807)	(17,712)
Recoveries on Loans and Leases Previously Charged-Off	3,804	2,769	10,413	8,705
Net Loans and Leases Recovered (Charged-Off)	1,457	(2,986)	(7,394)	(9,007)
Provision for Credit Losses	28,600	4,250	102,600	11,250
Balance at End of Period	203,496	108,936	203,496	108,936
Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			110,027
CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			(1,737)
January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			108,290
Commercial
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	72,522	69,268		66,874
Loans and Leases Charged-Off	(171)	(239)	(1,520)	(2,431)
Recoveries on Loans and Leases Previously Charged-Off	231	318	2,084	1,220
Net Loans and Leases Recovered (Charged-Off)	60	79	564	(1,211)
Provision for Credit Losses	7,685	1,023	24,691	4,707
Balance at End of Period	80,267	70,370	80,267	70,370
Commercial | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			73,801
Commercial | CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			(18,789)
Commercial | January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			55,012
Consumer
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	100,917	38,404		39,819
Loans and Leases Charged-Off	(2,176)	(5,516)	(16,287)	(15,281)
Recoveries on Loans and Leases Previously Charged-Off	3,573	2,451	8,329	7,485
Net Loans and Leases Recovered (Charged-Off)	1,397	(3,065)	(7,958)	(7,796)
Provision for Credit Losses	20,915	3,227	77,909	6,543
Balance at End of Period	$ 123,229	$ 38,566	123,229	$ 38,566
Consumer | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			36,226
Consumer | CECL Adoption Impact | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses:
Balance at Beginning of Period			17,052
Consumer | January 1, 2020 | Accounting Standards Update 2016-13
Allowance for Loan and Lease 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) $ in Thousands	Sep. 30, 2020USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	$ 2,750,366
2019	1,877,674
2018	1,243,476
2017	1,021,317
2016	1,026,082
Prior	1,738,977
Revolving Loans	2,093,169
Revolving Loans Converted to Term Loans	42,547
Total Loans and Leases	11,793,608
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	1,630,318
2019	859,546
2018	619,148
2017	377,449
2016	373,294
Prior	655,942
Revolving Loans	500,055
Revolving Loans Converted to Term Loans	1,115
Total Loans and Leases	5,016,867
Commercial | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	891,773
2019	173,211
2018	187,317
2017	74,812
2016	66,055
Prior	106,492
Revolving Loans	407,707
Revolving Loans Converted to Term Loans	1,115
Total Loans and Leases	1,908,482
Commercial | Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	858,458
2019	171,894
2018	184,256
2017	73,712
2016	62,461
Prior	86,296
Revolving Loans	364,123
Revolving Loans Converted to Term Loans	977
Total Loans and Leases	1,802,177
Commercial | Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	9,201
2019	510
2018	2,155
2017	162
2016	2,001
Prior	147
Revolving Loans	20,397
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	34,573
Commercial | Commercial and Industrial | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	24,114
2019	807
2018	906
2017	938
2016	1,593
Prior	20,049
Revolving Loans	23,187
Revolving Loans Converted to Term Loans	138
Total Loans and Leases	71,732
Commercial | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	635,585
2019	547,416
2018	401,930
2017	286,356
2016	296,618
Prior	503,159
Revolving Loans	74,547
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	2,745,611
Commercial | Commercial Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	588,510
2019	521,907
2018	377,630
2017	270,617
2016	290,575
Prior	487,821
Revolving Loans	74,547
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	2,611,607
Commercial | Commercial Mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	5,621
2019	24,850
2018	19,416
2017	15,463
2016	1,252
Prior	5,432
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	72,034
Commercial | Commercial Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	41,454
2019	659
2018	4,884
2017	276
2016	4,791
Prior	9,906
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	61,970
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	89,712
2019	117,759
2018	14,221
2017	11,450
2016	0
Prior	0
Revolving Loans	17,801
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	250,943
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	89,712
2019	117,759
2018	14,221
2017	11,450
2016	0
Prior	0
Revolving Loans	17,801
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	250,943
Commercial | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	13,248
2019	21,160
2018	15,680
2017	4,831
2016	10,621
Prior	46,291
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	111,831
Commercial | Lease Financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	13,214
2019	21,089
2018	14,549
2017	4,783
2016	10,509
Prior	46,291
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	110,435
Commercial | Lease Financing | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	34
2019	71
2018	1,131
2017	48
2016	112
Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	1,396
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	1,120,048
2019	1,018,128
2018	624,328
2017	643,868
2016	652,788
Prior	1,083,035
Revolving Loans	1,593,114
Revolving Loans Converted to Term Loans	41,432
Total Loans and Leases	6,776,741
Consumer | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	894,542
2019	629,503
2018	345,194
2017	517,338
2016	601,481
Prior	1,056,170
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	4,044,228
Consumer | Residential Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	894,542
2019	629,503
2018	345,194
2017	516,410
2016	601,481
Prior	1,052,843
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	4,039,973
Consumer | Residential Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	0
2019	0
2018	0
2017	928
2016	0
Prior	3,327
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	4,255
Consumer | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	0
2019	0
2018	0
2017	0
2016	0
Prior	5,406
Revolving Loans	1,560,252
Revolving Loans Converted to Term Loans	39,828
Total Loans and Leases	1,605,486
Consumer | Home Equity Loan [Member] | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	0
2019	0
2018	0
2017	0
2016	0
Prior	5,337
Revolving Loans	1,557,040
Revolving Loans Converted to Term Loans	38,766
Total Loans and Leases	1,601,143
Consumer | Home Equity Loan [Member] | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	0
2019	0
2018	0
2017	0
2016	0
Prior	69
Revolving Loans	3,212
Revolving Loans Converted to Term Loans	1,062
Total Loans and Leases	4,343
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	167,991
2019	230,997
2018	175,196
2017	78,552
2016	39,677
Prior	17,524
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	709,937
Consumer | Automobile | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	167,991
2019	230,969
2018	175,173
2017	78,461
2016	39,677
Prior	17,509
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	709,780
Consumer | Automobile | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	0
2019	28
2018	23
2017	91
2016	0
Prior	15
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	157
Consumer | Other Loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	57,515
2019	157,628
2018	103,938
2017	47,978
2016	11,630
Prior	3,935
Revolving Loans	32,862
Revolving Loans Converted to Term Loans	1,604
Total Loans and Leases	417,090
Consumer | Other Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	57,497
2019	157,529
2018	103,895
2017	47,942
2016	11,616
Prior	3,933
Revolving Loans	32,845
Revolving Loans Converted to Term Loans	1,575
Total Loans and Leases	416,832
Consumer | Other Loans | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD September 30, 2020	18
2019	99
2018	43
2017	36
2016	14
Prior	2
Revolving Loans	17
Revolving Loans Converted to Term Loans	29
Total Loans and Leases	$ 258

Loans and Leases and the Allo_7

Loans and Leases and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans and Leases by Class and Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	$ 11,793,608	$ 10,990,892
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	5,016,867	4,213,827
Commercial | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	1,908,482	1,379,152
Commercial | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	2,745,611	2,518,051
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	250,943	194,170
Commercial | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	111,831	122,454
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		4,079,663
Commercial | Pass | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		1,306,040
Commercial | Pass | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		2,463,858
Commercial | Pass | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		188,832
Commercial | Pass | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		120,933
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		58,323
Commercial | Special Mention | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		37,722
Commercial | Special Mention | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		16,453
Commercial | Special Mention | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		4,148
Commercial | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		75,841
Commercial | Classified | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		35,390
Commercial | Classified | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		37,740
Commercial | Classified | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		1,190
Commercial | Classified | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		1,521
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	6,776,741	6,777,065
Consumer | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	417,090	489,606
Consumer | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	4,044,228	3,891,100
Consumer | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	1,605,486	1,676,073
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases	$ 709,937	720,286
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		6,765,307
Consumer | Pass | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		488,113
Consumer | Pass | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		3,886,389
Consumer | Pass | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		1,671,468
Consumer | Pass | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		719,337
Consumer | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		11,758
Consumer | Classified | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		1,493
Consumer | Classified | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		4,711
Consumer | Classified | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		4,605
Consumer | Classified | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Total Recorded Investment in Loans and Leases		$ 949

Loans and Leases and the Allo_8

Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	$ 16,294	$ 17,380
Total Past Due and Non-Accrual	39,472	82,527
Current	11,754,136	10,908,365
Total Loans and Leases	11,793,608	10,990,892
Non-Accrual Loans and Leases that are Current	10,301	11,506
30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	10,168	45,964
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,418	10,777
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	9,592	8,406
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	9,090	10,074
Total Past Due and Non-Accrual	9,357	26,626
Current	5,007,510	4,187,201
Total Loans and Leases	5,016,867	4,213,827
Non-Accrual Loans and Leases that are Current	8,905	9,665
Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	475	830
Total Past Due and Non-Accrual	742	13,512
Current	1,907,740	1,365,640
Total Loans and Leases	1,908,482	1,379,152
Non-Accrual Loans and Leases that are Current	290	421
Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	8,615	9,244
Total Past Due and Non-Accrual	8,615	12,242
Current	2,736,996	2,505,809
Total Loans and Leases	2,745,611	2,518,051
Non-Accrual Loans and Leases that are Current	8,615	9,244
Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	152
Current	250,943	194,018
Total Loans and Leases	250,943	194,170
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	720
Current	111,831	121,734
Total Loans and Leases	111,831	122,454
Non-Accrual Loans and Leases that are Current	0	0
Commercial | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	220	16,353
Commercial | 30 - 59 Days Past Due | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	220	12,534
Commercial | 30 - 59 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	2,998
Commercial | 30 - 59 Days Past Due | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	101
Commercial | 30 - 59 Days Past Due | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	720
Commercial | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	47	199
Commercial | 60 - 89 Days Past Due | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	47	148
Commercial | 60 - 89 Days Past Due | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | 60 - 89 Days Past Due | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	51
Commercial | 60 - 89 Days Past Due | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Past Due 90 Days or More | Commercial and Industrial
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	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
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	7,204	7,306
Total Past Due and Non-Accrual	30,115	55,901
Current	6,746,626	6,721,164
Total Loans and Leases	6,776,741	6,777,065
Non-Accrual Loans and Leases that are Current	1,396	1,841
Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	2,764	7,065
Current	414,326	482,541
Total Loans and Leases	417,090	489,606
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	3,543	4,125
Total Past Due and Non-Accrual	14,428	14,131
Current	4,029,800	3,876,969
Total Loans and Leases	4,044,228	3,891,100
Non-Accrual Loans and Leases that are Current	0	1,429
Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	3,661	3,181
Total Past Due and Non-Accrual	9,879	13,535
Current	1,595,607	1,662,538
Total Loans and Leases	1,605,486	1,676,073
Non-Accrual Loans and Leases that are Current	1,396	412
Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	3,044	21,170
Current	706,893	699,116
Total Loans and Leases	709,937	720,286
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	9,948	29,611
Consumer | 30 - 59 Days Past Due | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,856	3,498
Consumer | 30 - 59 Days Past Due | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,695	6,097
Consumer | 30 - 59 Days Past Due | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,628	3,949
Consumer | 30 - 59 Days Past Due | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,769	16,067
Consumer | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,371	10,578
Consumer | 60 - 89 Days Past Due | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	650	2,074
Consumer | 60 - 89 Days Past Due | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,583	2,070
Consumer | 60 - 89 Days Past Due | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,019	2,280
Consumer | 60 - 89 Days Past Due | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	119	4,154
Consumer | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	9,592	8,406
Consumer | Past Due 90 Days or More | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	258	1,493
Consumer | Past Due 90 Days or More | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,607	1,839
Consumer | Past Due 90 Days or More | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,571	4,125
Consumer | Past Due 90 Days or More | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 156	$ 949

Loans and Leases and the Allo_9

Loans and Leases and the Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	$ 10,882
Non-accrual loans without a related ACL	5,412
Total Non-accrual loans	16,294	$ 17,380
Commercial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	4,019
Non-accrual loans without a related ACL	5,071
Total Non-accrual loans	9,090	10,074
Commercial | Commercial and Industrial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	475
Non-accrual loans without a related ACL	0
Total Non-accrual loans	475	830
Commercial | Commercial Mortgage
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	3,544
Non-accrual loans without a related ACL	5,071
Total Non-accrual loans	8,615	9,244
Consumer
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	6,863
Non-accrual loans without a related ACL	341
Total Non-accrual loans	7,204	7,306
Consumer | Residential Mortgage
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	3,202
Non-accrual loans without a related ACL	341
Total Non-accrual loans	3,543	4,125
Consumer | Home Equity
Financing Receivable, Nonaccrual [Line Items]
Non-accrual loans with a related ACL	3,661
Non-accrual loans without a related ACL	0
Total Non-accrual loans	$ 3,661	$ 3,181

Loans and Leases and the All_10

Loans and Leases and the Allowance for Credit Losses - Schedule of Loans Modified in TDR (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	22	101	129	355
Recorded Investment (as of period end)	$ 546	$ 1,827	$ 3,124	$ 9,783
Increase in Allowance (as of period end)	$ 9	$ 26	$ 40	$ 95
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	1	1	4	6
Recorded Investment (as of period end)	$ 92	$ 45	$ 1,287	$ 4,010
Increase in Allowance (as of period end)	$ 1	$ 0	$ 3	$ 14
Commercial | Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	1	1	3	5
Recorded Investment (as of period end)	$ 92	$ 45	$ 188	$ 244
Increase in Allowance (as of period end)	$ 1	$ 0	$ 3	$ 14
Commercial | Commercial Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts | contract			1	1
Recorded Investment (as of period end)			$ 1,099	$ 3,766
Increase in Allowance (as of period end)			$ 0	$ 0
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	21	100	125	349
Recorded Investment (as of period end)	$ 454	$ 1,782	$ 1,837	$ 5,773
Increase in Allowance (as of period end)	$ 8	$ 26	$ 37	$ 81
Consumer | Other
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	7	14	42	75
Recorded Investment (as of period end)	$ 93	$ 117	$ 357	$ 459
Increase in Allowance (as of period end)	$ 4	$ 3	$ 15	$ 12
Consumer | Residential Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts | contract			0	1
Recorded Investment (as of period end)			$ 0	$ 57
Increase in Allowance (as of period end)			$ 0	$ 0
Consumer | Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	2	0	2	2
Recorded Investment (as of period end)	$ 134	$ 0	$ 134	$ 246
Increase in Allowance (as of period end)	$ 0	$ 0	$ 0	$ 0
Consumer | Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	12	86	81	271
Recorded Investment (as of period end)	$ 227	$ 1,665	$ 1,346	$ 5,011
Increase in Allowance (as of period end)	$ 4	$ 23	$ 22	$ 69

Loans and Leases and the All_11

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		9 Months Ended
	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	20	39	49
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 526	$ 629	$ 853
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract			0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 0	$ 55
Commercial | Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract			0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 0	$ 55
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	20	39	48
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 526	$ 629	$ 798
Consumer | Other
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	9	6	24
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 72	$ 38	$ 144
Consumer | Residential Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	1	0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 133	$ 0	$ 133
Consumer | Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	9	33	22
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 126	$ 591	$ 326
Consumer | Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	1	0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 195	$ 0	$ 195

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Transfers And Servicing Of Financial Assets [Abstract]
Residential mortgage loans serviced for third parties	$ 3,000		$ 3,000		$ 3,100
Servicing income, including late and ancillary fees	$ 1.7	$ 1.8	$ 5.4	$ 5.4

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Servicing Assets At Fair Value [Line Items]
Balance at Beginning of Period	$ 1,068	$ 1,212	$ 1,126	$ 1,290
Due to Payoffs	(50)	(38)	(108)	(116)
Total Changes in Fair Value of Mortgage Servicing Rights	(50)	(38)	(108)	(116)
Balance at End of Period	$ 1,018	$ 1,174	$ 1,018	$ 1,174

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Mortgage Servicing Rights Accounted for Under the Amortization Method (Rollforward)
Balance at Beginning of Period	$ 21,836	$ 23,021	$ 23,896	$ 23,020
Servicing Rights that Resulted From Asset Transfers	872	1,263	3,042	2,788
Amortization	(1,271)	(1,032)	(3,684)	(2,546)
Valuation Allowance Recovery (Provision)	(568)	(18)	(2,385)	(28)
Balance at End of Period	20,869	23,234	20,869	23,234
Valuation Allowance:
Balance at Beginning of Period	(1,817)	(10)
Valuation Allowance Recovery (Provision)	(568)	(18)	(2,385)	(28)
Balance at End of Period	(2,385)	(28)	(2,385)	(28)
Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method
Beginning of Period	21,836	24,905	25,714	29,218
End of Period	$ 20,870	$ 23,674	$ 20,870	$ 23,674

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Key Data and Assumptions Used in Estimating the Fair Value (Details) - Mortgage Servicing Rights	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
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)	14.07%	10.76%
Weighted-Average Life (in years)	5 years 1 month 2 days	6 years 2 months 12 days
Weighted-Average Note Rate (as a percent)	3.90%	3.99%
Weighted-Average Discount Rate (as a percent)	5.88%	7.33%

Mortgage Servicing Rights - S_3

Mortgage Servicing Rights - Schedule of Sensitivity Analysis of the Fair Value (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$ (228)	$ (296)
Decrease in fair value from 50 bps adverse change	(452)	(586)
Discount Rate
Decrease in fair value from 25 bps adverse change	(205)	(264)
Decrease in fair value from 50 bps adverse change	$ (406)	$ (522)

Affordable Housing Projects T_3

Affordable Housing Projects Tax Credit Partnerships - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Equity Method Investments And Joint Ventures [Abstract]
Net affordable housing tax credit investments and related unfunded commitments	$ 117,900,000		$ 76,300,000
Write down from impairment of LIHTC Investments	$ 0	$ 0

Affordable Housing Projects T_4

Affordable Housing Projects Tax Credit Partnerships - Payments for Unfunded Affordable Housing Commitments (Details) $ in Thousands	Sep. 30, 2020USD ($)
Affordable Housing Tax Credit Investments, Unfunded Commitment [Abstract]
2020	$ 12,820
2021	10,283
2022	6,026
2023	6,059
2024	58
Thereafter	3,772
Total Unfunded Commitments	$ 39,018

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Effective Yield Method
Tax credits and other tax benefits recognized	$ 2,938	$ 2,930	$ 8,814	$ 8,789
Amortization Expense in Provision for Income Taxes	2,347	1,891	7,042	5,674
Proportional Amortization Method
Tax credits and other tax benefits recognized	1,794	753	4,839	2,260
Amortization Expense in Provision for Income Taxes	$ 1,345	$ 645	$ 3,580	$ 1,934

Balance Sheet Offsetting - Addi

Balance Sheet Offsetting - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Interest Rate Swap Agreements
Offsetting Assets And Liabilities [Line Items]
Net liability positions, aggregate fair value	$ 19.2	$ 5.1

Balance Sheet Offsetting - Rema

Balance Sheet Offsetting - Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 602,106,000	$ 604,306,000
Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase		237,238,000
Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	590,000	2,790,000
Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	117,607,000	115,734,000
Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	483,909,000	248,544,000
Maturity Up To 90 Days
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	1,516,000	1,200,000
Maturity Up To 90 Days | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase		0
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	1,200,000
Maturity Up To 90 Days | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	1,516,000	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	100,000	2,616,000
Maturity 91 To 365 Days | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase		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	100,000	1,100,000
Maturity 91 To 365 Days | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	1,516,000
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	25,000,000	225,000,000
Maturity 1 To 3 Years | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase		199,173,000
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	22,158,000	25,827,000
Maturity 1 To 3 Years | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	2,842,000	0
Maturity After 3 Years
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	575,490,000	375,490,000
Maturity After 3 Years | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase		38,065,000
Maturity After 3 Years | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	490,000	490,000
Maturity After 3 Years | Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	93,933,000	88,391,000
Maturity After 3 Years | Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 481,067,000	$ 248,544,000

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	Sep. 30, 2020	Dec. 31, 2019
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 602,106	$ 604,306
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	602,106	604,306
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	602,106	604,306
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
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
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Government Entities
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	2,106	4,306
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	2,106	4,306
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Repurchase Agreements, Fair Value of Collateral Pledged	2,106	4,306
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Interest Rate Swap Agreements | Institutional Counterparties
Assets:
Gross Amounts of Recognized Assets	5	584
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	5	584
Netting Adjustments per Master Netting Arrangements	5	584
Gross Amounts Not Offset in the Statements of Condition - FV of collateral pledged	0	0
Derivative Assets, Net Amount	0	0
Liabilities:
Gross Amounts of Recognized Liabilities	19,161	5,361
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	19,161	5,361
Derivative Liability, Netting Adjustments per Master Netting Arrangements	5	584
Derivative, Collateral, Right to Reclaim Securities	8,962	3,818
Derivative Liabilities, Net Amount	$ 10,194	$ 959

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	Sep. 30, 2020	Dec. 31, 2019
Private Institutions
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 634.6	$ 645.3
Government Entities
Offsetting Assets And Liabilities [Line Items]
Fair value of investment securities pledged	$ 4.3	$ 5.5

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - AOCI Components Pre Post & Tax Effect (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Comprehensive Income (Loss), Before Tax:
Net Unrealized Gains (Losses) Arising During the Period	$ (6,771)			$ 7,314			$ 60,177	$ 38,077
(Gain) Loss on sale, before tax							(77)	(63)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	104			39			289	804
Net Unrealized Gains (Losses) on Investment Securities	(6,667)			7,353			60,389	38,818
Amortization of Net Actuarial Losses (Gains)	570			406			1,711	1,218
Amortization of Prior Service Credit	(61)			(72)			(184)	(216)
Defined Benefit Plans, Net	509			334			1,527	1,002
Other Comprehensive Income (Loss)	(6,158)			7,687			61,916	39,820
Other Comprehensive Income (Loss), Tax Effect:
Net Unrealized Gains (Losses) Arising During the Period	(1,795)			1,938			15,945	10,090
(Gain) Loss on Sale, Tax Effect							(21)	(17)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	28			10			76	212
Net Unrealized Gains (Losses) on Investment Securities	(1,767)			1,948			16,000	10,285
Amortization of Net Actuarial Losses (Gains)	151			108			454	323
Amortization of Prior Service Credit	(16)			(19)			(49)	(57)
Defined Benefit Plans, Net	135			89			405	266
Other Comprehensive Income (Loss)	(1,632)			2,037			16,405	10,551
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) Arising During the Period	(4,976)			5,376			44,232	27,987
(Gain) Loss on sale, Net of Tax							(56)	(46)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	76			29			213	592
Net Unrealized Gains (Losses) on Investment Securities	(4,900)			5,405			44,389	28,533
Amortization of Net Actuarial Losses (Gains)	419			298			1,257	895
Amortization of Prior Service Credit	(45)			(53)			(135)	(159)
Defined Benefit Plans, Net	374			245			1,122	736
Total Other Comprehensive Income (Loss)	$ (4,526)	$ 8,104	$ 41,933	$ 5,650	$ 16,454	$ 7,165	$ 45,511	$ 29,269

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Change in AOCI Components Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	$ 1,352,082	$ 1,327,929	$ 1,286,832	$ 1,285,948	$ 1,269,690	$ 1,268,200	$ 1,286,832	$ 1,268,200
Total Other Comprehensive Income (Loss)	(4,526)	8,104	41,933	5,650	16,454	7,165	45,511	29,269
Balance at End of Period	1,361,739	1,352,082	1,327,929	1,291,490	1,285,948	1,269,690	1,361,739	1,291,490
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	57,511		8,359	8,859		(10,447)	8,359	(10,447)
Other Comprehensive Income (Loss) Before Reclassifications	(4,976)			5,376			44,232	27,987
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax								(3,259)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0			0			(56)	(46)
Total Other Comprehensive Income (Loss)	(4,976)			5,376			44,176	24,682
Balance at End of Period	52,535	57,511		14,235	8,859		52,535	14,235
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	(578)		(715)	(764)		(4,586)	(715)	(4,586)
Other Comprehensive Income (Loss) Before Reclassifications	0			0			0	0
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax								3,259
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	76			29			213	592
Total Other Comprehensive Income (Loss)	76			29			213	3,851
Balance at End of Period	(502)	(578)		(735)	(764)		(502)	(735)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(38,008)		(38,756)	(35,519)		(36,010)	(38,756)	(36,010)
Other Comprehensive Income (Loss) Before Reclassifications	0			0			0	0
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax								0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	374			245			1,122	736
Total Other Comprehensive Income (Loss)	374			245			1,122	736
Balance at End of Period	(37,634)	(38,008)		(35,274)	(35,519)		(37,634)	(35,274)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	18,925	10,821	(31,112)	(27,424)	(43,878)	(51,043)	(31,112)	(51,043)
Other Comprehensive Income (Loss) Before Reclassifications	(4,976)			5,376			44,232	27,987
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax								0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	450			274			1,279	1,282
Total Other Comprehensive Income (Loss)	(4,526)	8,104	41,933	5,650	16,454	7,165	45,511	29,269
Balance at End of Period	$ 14,399	$ 18,925	$ 10,821	$ (21,774)	$ (27,424)	$ (43,878)	$ 14,399	$ (21,774)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) - AOCI Reclass to IS (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Tax Benefit (Expense)	$ (9,511)			$ (14,752)			$ (26,731)	$ (44,315)
Net Income	37,840	$ 38,908	$ 34,742	52,052	$ 56,919	$ 58,799	111,490	167,770
Salaries and Benefits	(51,951)			(54,345)			(157,129)	(164,442)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income	(450)			(274)			(1,279)	(1,282)
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	(103)			(39)			(289)	(804)
Tax Benefit (Expense)	27			10			76	212
Net Income	(76)			(29)			(213)	(592)
Reclassification out of Accumulated Other Comprehensive Income | Prior Service Credit
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	62			72			185	216
Reclassification out of Accumulated Other Comprehensive Income | Net Actuarial Losses
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	(571)			(406)			(1,712)	(1,218)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Defined Benefit Pension Items
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Tax Benefit (Expense)	135			89			405	266
Net Income	(374)			(245)			(1,122)	(736)
Salaries and Benefits	$ (509)			$ (334)			(1,527)	(1,002)
Reclassification out of Accumulated Other Comprehensive Income | Sale of Investment Securities Available-for-Sale
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Tax Benefit (Expense)							(21)	(17)
Net Income							56	46
Sale of Investment Securities Available-for-Sale							$ 77	$ 63

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reconciliation of Diluted Shares
Denominator for Basic Earnings Per Share (in shares)	39,745,120	40,190,508	39,710,252	40,554,036
Dilutive Effect of Equity Based Awards (in shares)	124,015	260,234	162,154	252,259
Denominator for Diluted Earnings Per Share (in shares)	39,869,135	40,450,742	39,872,406	40,806,295
Antidilutive Stock Options and Restricted Stock Outstanding (in shares)	108,207		106,140	2,399

Business Segments - Additional

Business Segments - Additional Information (Details)	9 Months Ended
	Sep. 30, 2020branchatm
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	67
Number of ATM's through which products and services are delivered to customers | atm	358

Business Segments - Selected Bu

Business Segments - Selected Business Segments Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business segment financial information
Net Interest Income	$ 124,166			$ 124,896			$ 376,823	$ 373,830
Provision for Credit Losses	28,600			4,250			102,600	11,250
Net Interest Income After Provision for Credit Losses	95,566			120,646			274,223	362,580
Noninterest Income	41,734			46,507			139,151	135,636
Noninterest Expense	(89,949)			(100,349)			(275,153)	(286,131)
Income Before Provision for Income Taxes	47,351			66,804			138,221	212,085
Provision for Income Taxes	(9,511)			(14,752)			(26,731)	(44,315)
Net Income	37,840	$ 38,908	$ 34,742	52,052	$ 56,919	$ 58,799	111,490	167,770
Total Assets	20,109,489			17,672,140			20,109,489	17,672,140	$ 18,095,496
Consumer Banking
Business segment financial information
Net Interest Income	73,868			76,289			221,003	229,704
Provision for Credit Losses	(1,372)			3,116			8,215	7,866
Net Interest Income After Provision for Credit Losses	75,240			73,173			212,788	221,838
Noninterest Income	31,776			36,627			93,309	107,072
Noninterest Expense	(69,408)			(75,198)			(210,744)	(213,168)
Income Before Provision for Income Taxes	37,608			34,602			95,353	115,742
Provision for Income Taxes	(9,627)			(8,506)			(24,235)	(28,745)
Net Income	27,981			26,096			71,118	86,997
Total Assets	7,383,822			6,993,290			7,383,822	6,993,290
Commercial Banking
Business segment financial information
Net Interest Income	47,797			46,791			144,253	139,784
Provision for Credit Losses	(85)			(130)			(819)	1,141
Net Interest Income After Provision for Credit Losses	47,882			46,921			145,072	138,643
Noninterest Income	7,672			8,739			26,483	22,738
Noninterest Expense	(15,430)			(21,330)			(47,552)	(63,545)
Income Before Provision for Income Taxes	40,124			34,330			124,003	97,836
Provision for Income Taxes	(9,784)			(8,560)			(30,278)	(22,507)
Net Income	30,340			25,770			93,725	75,329
Total Assets	5,027,836			4,145,717			5,027,836	4,145,717
Treasury and Other
Business segment financial information
Net Interest Income	2,501			1,816			11,567	4,342
Provision for Credit Losses	30,057			1,264			95,204	2,243
Net Interest Income After Provision for Credit Losses	(27,556)			552			(83,637)	2,099
Noninterest Income	2,286			1,141			19,359	5,826
Noninterest Expense	(5,111)			(3,821)			(16,857)	(9,418)
Income Before Provision for Income Taxes	(30,381)			(2,128)			(81,135)	(1,493)
Provision for Income Taxes	9,900			2,314			27,782	6,937
Net Income	(20,481)			186			(53,353)	5,444
Total Assets	$ 7,697,831			$ 6,533,133			$ 7,697,831	$ 6,533,133

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	$ 0	$ 0	$ 0	$ 0
Interest Cost	900	1,093	2,699	2,187
Expected Return on Plan Assets	(1,258)	(1,249)	(3,773)	(2,498)
Amortization of Prior Service Credit	0	0	0	0
Amortization of Net Actuarial Losses (Gains)	570	484	1,711	968
Net Periodic Benefit Cost	212	328	637	657
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	152	117	454	235
Interest Cost	230	257	694	515
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credit	(61)	(72)	(184)	(144)
Amortization of Net Actuarial Losses (Gains)	0	(78)	0	(156)
Net Periodic Benefit Cost	$ 321	$ 224	$ 964	$ 450

Pension Plans and Postretirem_4

Pension Plans and Postretirement Benefit Plan - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Employer contributions	$ 0.1	$ 0.3
Estimated future employer contributions in current fiscal year	0.4	0.4
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Employer contributions	0.3	0.8
Estimated future employer contributions in current fiscal year	$ 1	$ 1

Derivative Financial Instrume_3

Derivative Financial Instruments - Schedule of the Notional Amount and Fair Value of the Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Interest Rate Lock Commitments
Derivative [Line Items]
Notional Amount	$ 63,895	$ 48,677
Fair Value	3,316	1,280
Forward Commitments
Derivative [Line Items]
Notional Amount	62,492	82,735
Fair Value	(215)	(182)
Receive Fixed / Pay Variable Swap
Derivative [Line Items]
Notional Amount	1,275,732	802,389
Fair Value	103,662	26,070
Pay Fixed / Receive Variable Swap
Derivative [Line Items]
Notional Amount	1,275,732	802,389
Fair Value	(19,156)	(4,777)
Foreign Exchange Contracts
Derivative [Line Items]
Notional Amount	98,173	85,499
Fair Value	213	163
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Notional Amount	121,854	114,499
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	Sep. 30, 2020	Dec. 31, 2019
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	$ 107,349	$ 28,931
Liability Derivatives	19,529	6,377
Interest Rate Lock Commitments
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	3,316	1,280
Liability Derivatives	0	0
Forward Commitments
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	9	23
Liability Derivatives	224	205
Interest Rate Swap Agreements
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	103,671	27,344
Liability Derivatives	19,165	6,051
Foreign Exchange Contracts
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	353	284
Liability Derivatives	$ 140	$ 121

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	$ 7,350	$ 7,093	$ 25,348	$ 15,366
Interest Rate Lock Commitments | Mortgage Banking Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	4,903	4,381	15,556	9,667
Forward Commitments | Mortgage Banking Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	(595)	(282)	(3,652)	(2,257)
Interest Rate Swap Agreements | Other Noninterest Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	2,575	2,967	12,041	5,863
Foreign Exchange Contracts | Other Noninterest Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	$ 467	480	$ 1,403	2,546
Conversion Rate Swap Agreement | Investment Securities Gains (Losses), Net
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income		$ (453)		$ (453)

Derivative Financial Instrume_6

Derivative Financial Instruments - Additional Information (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Liability derivatives	$ 19,529,000	$ 6,377,000
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	Sep. 30, 2020	Dec. 31, 2019
Credit Commitments [Line Items]
Credit Commitments	$ 2,891,840	$ 2,811,918
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	104,695	81,000
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	12,394	16,981
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	$ 2,774,751	$ 2,713,937

Commitments, Contingencies, a_4

Commitments, Contingencies, and Guarantees - Additional Information (Details) $ in Millions	Oct. 16, 2019USD ($)	Sep. 30, 2020USD ($)Loan
Residential Mortgage
Representations and Warranties [Line Items]
Continuing involvement with transferred financial assets, principal amount outstanding		$ 2,700
Residential mortgage loans repurchased		$ 0.5
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
Representations and Warranties [Line Items]
Litigation settlement amount	$ 8
Loss contingency accrual amount		$ 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	Sep. 30, 2020	Dec. 31, 2019
Assets:
Available-for-Sale: Fair Value	$ 3,190,313	$ 2,619,003
Loans Held for Sale		39,062
Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	46,803	55,097
Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,016	22,147
Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	224,454	336,321
Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,520,502	1,172,826
Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	937,068	586,761
Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	279,025	224,720
Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	2,736,595	1,984,307
Fair Value, Measurements, Recurring
Assets:
Available-for-Sale: Fair Value	3,190,313	2,619,003
Loans Held for Sale		39,062
Mortgage Servicing Rights	1,018	1,126
Other Assets	48,184	41,464
Derivatives	107,349	28,931
Total Assets Measured at Fair Value on a Recurring Basis	3,346,864	2,729,586
Liabilities:
Derivatives	19,529	6,377
Total Liabilities Measured at Fair Value on a Recurring Basis	19,529	6,377
Fair Value, Measurements, Recurring | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	181,445	221,131
Fair Value, Measurements, Recurring | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	46,803	55,097
Fair Value, Measurements, Recurring | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,016	22,147
Fair Value, Measurements, Recurring | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	224,454	336,321
Fair Value, Measurements, Recurring | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,520,502	1,172,826
Fair Value, Measurements, Recurring | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	937,068	586,761
Fair Value, Measurements, Recurring | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	279,025	224,720
Fair Value, Measurements, Recurring | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	2,736,595	1,984,307
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)
Assets:
Available-for-Sale: Fair Value	1,111	1,155
Loans Held for Sale		0
Mortgage Servicing Rights	0	0
Other Assets	48,184	41,464
Derivatives	0	0
Total Assets Measured at Fair Value on a Recurring Basis	49,295	42,619
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	1,111	1,155
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	3,189,202	2,617,848
Loans Held for Sale		39,062
Mortgage Servicing Rights	0	0
Other Assets	0	0
Derivatives	362	308
Total Assets Measured at Fair Value on a Recurring Basis	3,189,564	2,657,218
Liabilities:
Derivatives	364	327
Total Liabilities Measured at Fair Value on a Recurring Basis	364	327
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	180,334	219,976
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	46,803	55,097
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	1,016	22,147
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	224,454	336,321
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,520,502	1,172,826
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	937,068	586,761
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	279,025	224,720
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	2,736,595	1,984,307
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3)
Assets:
Available-for-Sale: Fair Value	0	0
Loans Held for Sale		0
Mortgage Servicing Rights	1,018	1,126
Other Assets	0	0
Derivatives	106,987	28,623
Total Assets Measured at Fair Value on a Recurring Basis	108,005	29,749
Liabilities:
Derivatives	19,165	6,050
Total Liabilities Measured at Fair Value on a Recurring Basis	19,165	6,050
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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Mortgage Servicing Rights Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Mortgage Servicing Rights, Beginning Balance	$ 1,068	$ 1,212	$ 1,126	$ 1,290
Fair Value, Mortgage Servicing Rights, Realized and Unrealized Net Gains (Losses) Included in Net Income	(50)	(38)	(108)	(116)
Fair Value, Mortgage Servicing Rights, Ending Balance	1,018	1,174	1,018	1,174
Fair Value, Mortgage Service Rights, Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	0	0	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	88,995	19,956	22,573	4,416
Fair Value, Net Derivative Assets and Liabilities, Realized and Unrealized Net Gains (Losses) Included in Net Income	4,909	4,360	15,372	9,602
Fair Value, Net Derivative Assets and Liabilities, Transfers to Loans Held for Sale	(4,242)	(3,736)	(13,521)	(7,750)
Variation margin payments for swap liabilities	(1,840)	11,331	63,398	25,643
Fair Value, Net Derivative Assets and Liabilities, Ending Balance	87,822	31,911	87,822	31,911
Fair Value, Net Derivative Assets and Liabilities,Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	$ 87,822	$ 31,911	$ 87,822	$ 31,911

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	9 Months Ended
	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
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	$ 84,506	$ 21,293
Discounted Cash Flow | Weighted Average Discount Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0588	0.0733
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	0.0032	0.0020
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	$ 21,888	$ 26,840
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	0.1407	0.1076
Pricing Model Technique | 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	$ 3,316	$ 1,280
Pricing Model Technique | 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	0.9103	0.9224
Minimum | Discounted Cash Flow | Weighted Average Discount Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0586
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
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%
Minimum | Pricing Model Technique | 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
Maximum | Discounted Cash Flow | Weighted Average Discount Rate (as a percent)
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items]
Mortgage Servicing Rights, Fair Value Inputs	0.0635
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
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	14.77%
Maximum | Pricing Model Technique | 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

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) $ in Thousands	Sep. 30, 2020USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Carrying Amount	$ 20,870
Valuation Allowance	$ (2,385)

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities - Additional Information (Details)	Sep. 30, 2020USD ($)
Fair Value Disclosures [Abstract]
Loans held for sale	$ 0

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) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 0
Residential mortgage loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value		$ 39,062,000
Aggregate Unpaid Principal		38,293,000
Aggregate Fair Value Less Aggregate Unpaid Principal		$ 769,000

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	Sep. 30, 2020	Dec. 31, 2019
Financial Instruments - Assets
Held-to-Maturity: Fair Value	$ 3,288,668	$ 3,062,882
Carrying Amount
Financial Instruments - Assets
Held-to-Maturity: Fair Value	3,198,830	3,042,294
Loans	11,397,713	10,664,885
Financial Instruments - Liabilities
Time Deposits	1,721,977	1,802,431
Securities Sold Under Agreements to Repurchase	602,106	604,306
Other Debt	50,000	75,000
Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	3,288,668	3,062,882
Loans	12,009,113	10,873,208
Financial Instruments - Liabilities
Time Deposits	1,729,433	1,800,773
Securities Sold Under Agreements to Repurchase	654,283	627,780
Other Debt	51,648	75,581
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	62,714	275,663
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	3,225,954	2,787,219
Loans	0	0
Financial Instruments - Liabilities
Time Deposits	1,729,433	1,800,773
Securities Sold Under Agreements to Repurchase	654,283	627,780
Other Debt	51,648	75,581
Significant Other Unobservable Inputs (Level 3) | Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	0	0
Loans	12,009,113	10,873,208
Financial Instruments - Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	0	0
Other Debt	$ 0	$ 0

Revenue Recognition - Summary o

Revenue Recognition - Summary of Noninterest Income Segregated by Revenue Streams In-Scope and Out-of-Scope of Topic 606 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Service Charges on Deposit Accounts	$ 6,027	$ 7,592	$ 18,575	$ 22,239
Fees, Exchange, and Other Service Charges	12,296	14,900	34,913	43,360
Annuity and Insurance	881	1,278	2,692	5,662
Other	7,046	6,765	23,574	18,756
Noninterest Income	41,734	46,507	139,151	135,636
Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Noninterest Income	41,734	46,507	139,151	135,636
Accounting Standards Update 2014-09 | Noninterest Income In Scope of Topic 606
Disaggregation of Revenue [Line Items]
Trust and Asset Management	10,752	10,930	32,217	33,076
Service Charges on Deposit Accounts	3,000	3,268	8,770	9,912
Fees, Exchange, and Other Service Charges	9,130	11,705	26,489	34,859
Annuity and Insurance	855	1,251	2,605	5,567
Other	2,131	2,224	6,697	7,200
Noninterest Income	25,868	29,378	76,778	90,614
Accounting Standards Update 2014-09 | Noninterest Income Out of Scope of Topic 606
Disaggregation of Revenue [Line Items]
Noninterest Income	$ 15,866	$ 17,129	$ 62,373	$ 45,022

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Contract balances	$ 0	$ 0