Glacier Bancorp (GBCI) 10-Q 1 Nov 21 2021 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2021	Oct. 18, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	000-18911
Entity Registrant Name	GLACIER BANCORP, INC.
Entity Incorporation, State or Country Code	MT
Entity Tax Identification Number	81-0519541
Entity Address, Address Line One	49 Commons Loop
Entity Address, City or Town	Kalispell,
Entity Address, State or Province	MT
Entity Address, Postal Zip Code	59901
City Area Code	(406)
Local Phone Number	756-4200
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	GBCI
Security Exchange Name	NASDAQ
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		110,686,648
Entity Central Index Key	0000868671
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash on hand and in banks	$ 250,579	$ 227,108
Interest bearing cash deposits	98,309	406,034
Cash and cash equivalents	348,888	633,142
Debt securities, available-for-sale	7,390,580	5,337,814
Debt securities, held-to-maturity	1,128,299	189,836
Total debt securities	8,518,879	5,527,650
Loans held for sale, at fair value	94,138	166,572
Loans receivable	11,293,891	11,122,696
Allowance for credit losses	(153,609)	(158,243)
Loans receivable, net	11,140,282	10,964,453
Premises and equipment, net	316,191	325,335
Other real estate owned	106	1,744
Accrued interest receivable	79,699	75,497
Core deposit intangible, net	48,045	55,509
Goodwill	514,013	514,013
Non-marketable equity securities	10,021	10,023
Bank-owned life insurance	123,729	123,763
Other assets	120,028	106,505
Total assets	21,314,019	18,504,206
Liabilities
Non-interest bearing deposits	6,632,402	5,454,539
Interest bearing deposits	10,870,912	9,342,990
Securities sold under agreements to repurchase	1,040,939	1,004,583
Other borrowed funds	33,671	33,068
Subordinated debentures	132,580	139,959
Accrued interest payable	2,437	3,305
Deferred tax liability	1,815	23,860
Other liabilities	211,647	194,861
Total liabilities	18,926,403	16,197,165
Commitments and Contingent Liabilities	0	0
Stockholders’ Equity
Preferred shares, $0.01 par value per share, 1,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value per share, 117,187,500 shares authorized	955	954
Paid-in capital	1,497,939	1,495,053
Retained earnings - substantially restricted	811,063	667,944
Accumulated other comprehensive income	77,659	143,090
Total stockholders’ equity	2,387,616	2,307,041
Total liabilities and stockholders’ equity	$ 21,314,019	$ 18,504,206
Number of common stock shares issued and outstanding (in shares)	95,512,659	95,426,364

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred shares, authorized (in shares)	1,000,000	1,000,000
Preferred shares, issued (in shares)	0	0
Preferred shares, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	117,187,500	117,187,500

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Income
Investment securities	$ 30,352	$ 25,381	$ 86,388	$ 72,228
Residential real estate loans	9,885	11,592	29,572	35,216
Commercial loans	115,533	109,514	339,903	314,541
Consumer and other loans	10,971	11,000	32,386	33,771
Total interest income	166,741	157,487	488,249	455,756
Interest Expense
Deposits	2,609	3,952	8,427	14,120
Securities sold under agreements to repurchase	496	886	1,836	2,783
Federal Home Loan Bank advances	0	70	0	684
Other borrowed funds	178	173	529	473
Subordinated debentures	845	1,003	2,563	3,705
Total interest expense	4,128	6,084	13,355	21,765
Net Interest Income	162,613	151,403	474,894	433,991
Provision for credit losses	725	5,186	(4,880)	41,300
Net interest income after provision for credit losses	161,888	146,217	479,774	392,691
Non-Interest Income
Service charges and other fees	15,154	13,404	41,741	38,790
Miscellaneous loan fees and charges	2,592	2,084	8,293	5,051
Gain on sale of loans	13,902	35,516	51,632	73,236
Gain (Loss) on sale of debt securities	(168)	24	55	1,015
Other income	3,335	2,639	8,737	10,071
Total non-interest income	34,815	53,667	110,458	128,163
Non-Interest Expense
Compensation and employee benefits	66,364	64,866	192,941	182,507
Occupancy and equipment	9,412	9,369	28,135	27,945
Advertising and promotions	3,236	2,779	8,513	7,404
Data processing	5,135	5,597	16,002	15,921
Other real estate owned	142	186	202	373
Regulatory assessments and insurance	2,011	1,495	5,592	3,622
Core deposit intangibles amortization	2,488	2,612	7,464	7,758
Other expenses	15,320	16,469	41,926	48,094
Total non-interest expense	104,108	103,373	300,775	293,624
Income Before Income Taxes	92,595	96,511	289,457	227,230
Federal and state income tax expense	16,976	18,754	55,409	42,690
Net Income	$ 75,619	$ 77,757	$ 234,048	$ 184,540
Basic earnings per share (in dollars per share)	$ 0.79	$ 0.81	$ 2.45	$ 1.95
Diluted earnings per share (in dollars per share)	0.79	0.81	2.45	1.95
Dividends declared per share (in dollars per share)	$ 0.32	$ 0.30	$ 0.95	$ 0.88
Average outstanding shares - basic (in shares)	95,510,772	95,411,656	95,494,211	94,704,198
Average outstanding shares - diluted (in shares)	95,586,202	95,442,576	95,573,519	94,747,894

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 75,619	$ 77,757	$ 234,048	$ 184,540
Available-For-Sale and Transferred Securities:
Unrealized (losses) gains on available-for-sale securities	(15,259)	1,693	(84,929)	123,262
Reclassification adjustment for gains included in net income	(498)	(24)	(870)	(1,014)
Reclassification adjustment for securities transferred from available-for-sale to held-to-maturity	(1,379)	0	(2,237)	0
Tax effect	4,330	(424)	22,246	(30,979)
Net of tax amount	(12,806)	1,245	(65,790)	91,269
Cash Flow Hedge:
Unrealized gains (losses) on derivatives used for cash flow hedges	30	(76)	479	(532)
Tax effect	(7)	20	(120)	135
Net of tax amount	23	(56)	359	(397)
Total other comprehensive (loss) income, net of tax	(12,783)	1,189	(65,431)	90,872
Total Comprehensive Income	$ 62,836	$ 78,946	$ 168,617	$ 275,412

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative-effect of accounting changes	Common Stock	Paid-in Capital	Retained Earnings Substantially Restricted	Retained Earnings Substantially RestrictedCumulative-effect of accounting changes	Accumulated Other Compre- hensive Income (loss)
Balance, beginning (in shares) at Dec. 31, 2019			92,289,750
Balance, beginning at Dec. 31, 2019	$ 1,960,733	$ (12,347)	$ 923	$ 1,378,534	$ 541,050	$ (12,347)	$ 40,226
Increase (Decrease) in Stockholders' Equity
Net income	184,540				184,540
Other comprehensive income (loss)	90,872						90,872
Cash dividends declared	(84,134)				(84,134)
Stock issued in connection with acquisitions (in shares)			3,007,044
Stock issued in connection with acquisitions	112,133		$ 30	112,103
Stock issuances under stock incentive plans (in shares)			116,949
Stock issuances under stock incentive plans			$ 1	(1)
Stock-based compensation and related taxes	3,292			3,292
Balance, ending (in shares) at Sep. 30, 2020			95,413,743
Balance, ending at Sep. 30, 2020	$ 2,255,089		$ 954	1,493,928	629,109		131,098
Increase (Decrease) in Stockholders' Equity
Cash dividends declared per share (in dollars per share)	$ 0.88
Balance, beginning (in shares) at Jun. 30, 2020			95,409,061
Balance, beginning at Jun. 30, 2020	$ 2,203,715		$ 954	1,492,817	580,035		129,909
Increase (Decrease) in Stockholders' Equity
Net income	77,757				77,757
Other comprehensive income (loss)	1,189						1,189
Cash dividends declared	(28,683)				(28,683)
Stock issuances under stock incentive plans (in shares)			4,682
Stock-based compensation and related taxes	1,111			1,111
Balance, ending (in shares) at Sep. 30, 2020			95,413,743
Balance, ending at Sep. 30, 2020	$ 2,255,089		$ 954	1,493,928	629,109		131,098
Increase (Decrease) in Stockholders' Equity
Cash dividends declared per share (in dollars per share)	$ 0.30
Balance, beginning (in shares) at Dec. 31, 2020	95,426,364		95,426,364
Balance, beginning at Dec. 31, 2020	$ 2,307,041		$ 954	1,495,053	667,944		143,090
Increase (Decrease) in Stockholders' Equity
Net income	234,048				234,048
Other comprehensive income (loss)	(65,431)						(65,431)
Cash dividends declared	(90,929)				(90,929)
Stock issuances under stock incentive plans (in shares)			86,295
Stock issuances under stock incentive plans			$ 1	(1)
Stock-based compensation and related taxes	$ 2,887			2,887
Balance, ending (in shares) at Sep. 30, 2021	95,512,659		95,512,659
Balance, ending at Sep. 30, 2021	$ 2,387,616		$ 955	1,497,939	811,063		77,659
Increase (Decrease) in Stockholders' Equity
Cash dividends declared per share (in dollars per share)	$ 0.95
Balance, beginning (in shares) at Jun. 30, 2021			95,507,234
Balance, beginning at Jun. 30, 2021	$ 2,353,955		$ 955	1,496,488	766,070		90,442
Increase (Decrease) in Stockholders' Equity
Net income	75,619				75,619
Other comprehensive income (loss)	(12,783)						(12,783)
Cash dividends declared	(30,626)				(30,626)
Stock issuances under stock incentive plans (in shares)			5,425
Stock-based compensation and related taxes	$ 1,451			1,451
Balance, ending (in shares) at Sep. 30, 2021	95,512,659		95,512,659
Balance, ending at Sep. 30, 2021	$ 2,387,616		$ 955	$ 1,497,939	$ 811,063		$ 77,659
Increase (Decrease) in Stockholders' Equity
Cash dividends declared per share (in dollars per share)	$ 0.32

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share (in dollars per share)	$ 0.32	$ 0.30	$ 0.95	$ 0.88

Unaudited Condensed Consolida_7

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net income	$ 234,048	$ 184,540
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	(4,880)	41,300
Net amortization of debt securities	32,934	10,830
Net amortization of purchase accounting adjustments and deferred loan fees and costs	(1,003)	(23,369)
Origination of loans held for sale	(1,184,305)	(1,393,224)
Proceeds from loans held for sale	1,372,592	1,400,697
Gain on sale of loans	(51,632)	(73,236)
Gain on sale of debt securities	(55)	(1,015)
Bank-owned life insurance income, net	(2,027)	(2,059)
Stock-based compensation, net of tax benefits	3,440	2,829
Depreciation and amortization of premises and equipment	15,593	15,124
Gain on sale and write-downs of other real estate owned, net	(127)	(64)
Amortization of core deposit intangibles	7,464	7,758
Amortization of investments in variable interest entities	9,520	8,244
Net increase in accrued interest receivable	(4,201)	(33,558)
Net increase in other assets	(5,430)	(22,729)
Net decrease in accrued interest payable	(868)	(861)
Net decrease in other liabilities	(3,753)	(7,450)
Net cash provided by operating activities	417,310	113,757
Investing Activities
Maturities, prepayments and calls of available-for-sale debt securities	1,026,010	545,191
Purchases of available-for-sale debt securities	(4,035,869)	(1,839,308)
Maturities, prepayments and calls of held-to-maturity debt securities	25,480	29,530
Purchases of held-to-maturity debt securities	(125,527)	0
Principal collected on loans	4,825,177	2,978,796
Loan originations	(5,062,750)	(4,627,653)
Net additions to premises and equipment	(4,187)	(8,140)
Proceeds from sale of other real estate owned	3,246	2,140
Proceeds from redemption of non-marketable equity securities	180	76,275
Purchases of non-marketable equity securities	(2)	(71,397)
Proceeds from bank-owned life insurance	2,112	0
Investments in variable interest entities	(14,799)	(7,975)
Net cash received from acquisitions	0	43,713
Net cash used in investing activities	(3,360,929)	(2,878,828)
Financing Activities
Net increase in deposits	2,705,870	2,920,429
Net increase in securities sold under agreements to repurchase	36,356	388,595
Net decrease in short-term Federal Home Loan Bank advances	0	(30,000)
Proceeds from long-term Federal Home Loan Bank advances	0	30,000
Repayments of long-term Federal Home Loan Bank advances	0	(31,271)
Net (increase) decrease in other borrowed funds	(6,897)	463
Cash dividends paid	(74,709)	(73,999)
Tax withholding payments for stock-based compensation	(1,520)	(1,023)
Proceeds from stock option exercises	265	795
Net cash provided by financing activities	2,659,365	3,203,989
Net (decrease) increase in cash, cash equivalents and restricted cash	(284,254)	438,918
Cash, cash equivalents and restricted cash at beginning of period	633,142	330,961
Cash, cash equivalents and restricted cash at end of period	348,888	769,879
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest	14,223	22,626
Cash paid during the period for income taxes	58,645	43,944
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Transfer of debt securities from available-for-sale to held-to-maturity	844,020	0
Sale and refinancing of other real estate owned	0	215
Transfer of loans to other real estate owned	1,481	2,062
Right-of-use assets obtained in exchange for operating lease liabilities	801	7,343
Dividends declared during the period but not paid	30,761	28,799
Acquisitions
Fair value of common stock shares issued	0	112,133
Cash consideration	0	13,721
Fair value of assets acquired	0	745,420
Liabilities assumed	$ 0	$ 619,565

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Nature of Operations and Summary of Significant Accounting Policies General Glacier Bancorp, Inc. (“Company”) is a Montana corporation headquartered in Kalispell, Montana. The Company provides a full range of banking services to individuals and businesses in Montana, Idaho, Utah, Washington, Wyoming, Colorado, Arizona and Nevada through its wholly-owned bank subsidiary, Glacier Bank (“Bank”). The Company offers a wide range of banking products and services, including: 1) retail banking; 2) business banking; 3) real estate, commercial, agriculture and consumer loans; and 4) mortgage origination services. The Company serves individuals, small to medium-sized businesses, community organizations and public entities. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. These interim financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete financial statements and they should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. Operating results for the nine months ended September 30, 2021 are not necessarily indicative of the results anticipated for the year ending December 31, 2021. The condensed consolidated statement of financial condition of the Company as of December 31, 2020 has been derived from the audited consolidated statements of the Company as of that date. The Company is a defendant in legal proceedings arising in the normal course of business. In the opinion of management, the disposition of pending litigation will not have a material affect on the Company’s consolidated financial position, results of operations or liquidity. Material estimates that are particularly susceptible to significant change include: 1) the determination of the allowance for credit losses (“ACL” or “allowance”) on loans; 2) the valuation of debt securities; 3) the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans; and 4) the evaluation of goodwill impairment. For the determination of the ACL on loans and real estate valuation estimates, management obtains independent appraisals (new or updated) for significant items. Estimates relating to the investment valuations are obtained from independent third parties. Estimates relating to the evaluation of goodwill for impairment are determined based on internal calculations using independent party inputs. Principles of Consolidation The consolidated financial statements of the Company include the parent holding company and the Bank, which consists of sixteen bank divisions and a corporate division. The corporate division includes the Bank’s investment portfolio, wholesale borrowings and other centralized functions. The Bank divisions operate under separate names, management teams and advisory directors. The Company considers the Bank to be its sole operating segment as the Bank 1) engages in similar bank business activity from which it earns revenues and incurs expenses; 2) the operating results of the Bank are regularly reviewed by the Chief Executive Officer (“CEO”) (i.e., the chief operating decision maker) who makes decisions about resources to be allocated to the Bank; and 3) financial information is available for the Bank. All significant inter-company transactions have been eliminated in consolidation. The Bank has subsidiary interests in variable interest entities (“VIE”) for which the Bank has both the power to direct the VIE’s significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. These subsidiary interests are included in the Company’s consolidated financial statements. The Bank also has subsidiary interests in VIEs for which the Bank does not have a controlling financial interest and is not the primary beneficiary. These subsidiary interests are not included in the Company’s consolidated financial statements. The parent holding company owns non-bank subsidiaries that have issued trust preferred securities. The trust subsidiaries are not included in the Company’s consolidated financial statements. The Company's investments in the trust subsidiaries are included in other assets on the Company's statements of financial condition. Cash and Cash Equivalents Cash and cash equivalents include cash on hand, cash held as demand deposits at various banks and the Federal Reserve Bank (“FRB”), interest bearing deposits, federal funds sold, and liquid investments with original maturities of three months or less. The Bank is required to maintain an average reserve balance with either the FRB or in the form of cash on hand. During 2020, the Fed temporarily reduced the reserve requirement due to the coronavirus disease of 2019 (“COVID-19.”) The required reserve balance at September 30, 2021 was $0. De bt Securities On January 1, 2020, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses , which significantly changed the allowance for credit loss accounting policies for debt securities. The following debt securities and allowance for credit loss accounting policies are presented under Accounting Standards Codification™ (“ASC”) Topic 326. Debt securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity and are carried at amortized cost. Debt securities held primarily for the purpose of selling in the near term are classified as trading securities and are reported at fair value, with unrealized gains and losses included in income. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale and are reported at fair value with unrealized gains and losses, net of income taxes, as a separate component of other comprehensive income (“OCI”). Premiums and discounts on debt securities are amortized or accreted into income using a method that approximates the interest method. The objective of the interest method is to calculate periodic interest income at a constant effective yield. The Company does not have any debt securities classified as trading securities. When the Company acquires another entity, it records the debt securities at fair value. The Company reviews and analyzes the various risks that may be present within the investment portfolio on an ongoing basis, including market risk, credit risk and liquidity risk. Market risk is the risk to an entity’s financial condition resulting from adverse changes in the value of its holdings arising from movements in interest rates, foreign exchange rates, equity prices or commodity prices. The Company assesses the market risk of individual debt securities as well as the investment portfolio as a whole. Credit risk, broadly defined, is the risk that an issuer or counterparty will fail to perform on an obligation. The credit rating of a security is considered the primary credit quality indicator for debt securities. Liquidity risk refers to the risk that a security will not have an active and efficient market in which the security can be sold. A debt security is investment grade if the issuer has adequate capacity to meet its commitment over the expected life of the investment, i.e., the risk of default is low and full and timely repayment of interest and principal is expected. To determine investment grade status for debt securities, the Company conducts due diligence of the creditworthiness of the issuer or counterparty prior to acquisition and ongoing thereafter consistent with the risk characteristics of the security and the overall risk of the investment portfolio. Credit quality due diligence takes into account the extent to which a security is guaranteed by the U.S. government and other agencies of the U.S. government. The depth of the due diligence is based on the complexity of the structure, the size of the security, and takes into account material positions and specific groups of securities or stratifications for analysis and review of similar risk positions. The due diligence includes consideration of payment performance, collateral adequacy, internal analyses, third party research and analytics, external credit ratings and default statistics. The Company has acquired debt securities through acquisitions and if the securities have more than insignificant credit deterioration since origination, they are designated as purchased credit-deteriorated (“PCD”) securities. An ACL is determined using the same methodology as with other debt securities. The sum of a PCD security’s fair value and associated ACL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the debt security is a noncredit discount or premium, which is amortized into interest income over the life of the security. Subsequent changes to the ACL are recorded through provision for credit losses. For additional information relating to debt securities, see Note 2. Allowance for Credit Losses - Available-for-Sale Debt Securities For available-for-sale 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 of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through other expense. For the available-for-sale securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from cred it losses or other factors. In such assessment, the Company considers the extent to which fair value is less than amortized cost, if there are any changes to the investment grade of the security by a rating agency, and if there are any adverse conditions that impact the security. If this assessment indicates a credit loss exists, the present value of the cash flows expected to be collected from the security is compared to the amortized cost basis of the s ecurity. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a potential credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any estimated credit losses that have not been recorded through an ACL are recognized in OCI. The Company has elected to exclude accrued interest from the estimate of credit losses for available-for-sale debt securities. As part of its non-accrual policy, the Company charges-off uncollectable interest at the time it is determined to be uncollectable. Allowance for Credit Losses - Held-to-Maturity Debt Securities For estimating the allowance for held-to-maturity (“HTM”) debt securities that share similar risk characteristics with other securities, such securities are pooled based on major security type. For pools of such securities with similar risk characteristics, the historical lifetime probability of default and severity of loss in the event of default is derived or obtained from external sources and adjusted for the expected effects of reasonable and supportable forecasts over the expected lives of the securities on those historical credit losses. Expected credit losses on securities in the held-to-maturity portfolio that do not share similar risk characteristics with any of the pools of debt securities are individually measured based on net realizable value, or the difference between the discounted value of the expected future cash flows, based on the original effective interest rate, and the recorded amortized cost basis of the securities. The Company has elected to exclude accrued interest from the estimate of credit losses for held-to-maturity debt securities. As part of its non-accrual policy, the Company charges off uncollectable interest at the time it is determined to be uncollectable. Loans Held for Sale Loans held for sale generally consist of long-term, fixed rate, conforming, single-family residential real estate loans intended to be sold on the secondary market. Loans held for sale are recorded at fair value and may or may not be sold with servicing rights released. Changes in fair value are recognized in non-interest income. Fair value elections are made at the time of origination based on the Company’s fair value election policy. Loans Receivable On January 1, 2020, the Company adopted FASB ASU 2016-13, Financial Instruments - Credit Losses , which significantly changed the loan and allowance for credit loss accounting policies. The following loan and allowance for credit loss accounting policies are presented under ASC Topic 326. The Company’s loan segments or classes are based on the purpose of the loan and consist of residential real estate, commercial real estate, other commercial, home equity, and other consumer loans. Loans that are intended to be held-to-maturity are reported at the unpaid principal balance less net c harge-offs and adjusted for deferred fees and costs on originated loans and unamortized premiums or discounts on acquired loans. Interest income is accrued on the unpaid principal balance. Fees and costs on originated loans and premiums or discounts on acquired loans are deferred and subsequently amortized or accreted as a yield adjustment over the expected life of the loan utilizing the interest or straight-line methods. The interest method is utilized for loans with scheduled payment terms and the objective is to calculate periodic interest income at a constant effective yield. The straight-line method is utilized for revolving lines of credit or loans with no scheduled payment terms. When a loan is paid off prior to maturity, the remaining unamortized fees and costs on originated loans and unamortized premiums or discounts on acquired loans are immediately recognized into interest income. Loans that are thirty days or more past due based on payments received and applied to the loan are considered delinquent. Loans are designated non-accrual and the accrual of interest is discontinued when the collection of the contractual principal or interest is unlikely. A loan is typically placed on non-accrual when principal or interest is due and has remained unpaid for ninety days or more. When a loan is placed on non-accrual status, interest previously accrued but not collected is reversed against current period interest income. Subsequent payments on non-accrual loans are applied to the outstanding principal balance if doubt remains as to the ultimate collectability of the loan. Interest accruals are not resumed on partially charged-off impaired loans. For other loans on non-accrual, interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of management, the loans are estimated to be fully collectible as to both principal and interest. The Company has acquired loans through acquisitions, some of which have experienced more than insignificant credit deterioration since origination. The Company considers all acquired non-accrual loans to be PCD loans. In addition, the Company considers loans accruing ninety days or more past due or substandard loans to be PCD loans. An ACL is determined using the same methodology as other loans held for investment. The ACL determined on a collective basis is allocated to individual loans. The sum of a loan’s fair value and ACL becomes the initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the ACL are recorded through provision for credit losses. For additional information relating to loans, see Note 3. Allowance for Credit Losses - Loans Receivable The allowance for credit losses for loans receivable represents management’s estimate of credit losses over the expected contractual life of the loan portfolio. The estimate is determined based on the amortized cost of the loan portfolio including the loan balance adjusted for charge-offs, recoveries, deferred fees and costs, and loan discount and premiums. Recoveries are included only to the extent that such amounts were previously charged-off. The Company has elected to exclude accrued interest from the estimate of credit losses for loans. Determining the adequacy of the allowance is complex and requires a high degree of judgment by management about the effect of matters that are inherently uncertain. Subsequent evaluations of the then-existing loan portfolio, in light of the factors then prevailing, may result in significant changes in the allowance in those future periods. The allowance is increased for estimated credit losses which are recorded as expense. The portion of loans and overdraft balances determined by management to be uncollectable are charged-off as a reduction to the allowance and recoveries of amounts previously charged-off increase the allowance. The Company’s charge-off policy is consistent with bank regulatory standards. Consumer loans generally are charged-off when the loan becomes over 120 days delinquent. Real estate acquired as a result of foreclosure or by deed-in-lieu of foreclosure is classified as other real estate owned (“OREO”) until such time as it is sold. The expected credit loss estimate process involves procedures to consider the unique characteristics of each of the Company’s loan portfolio segments, which consist of residential real estate, commercial real estate, other commercial, home equity, and other consumer loans. When computing the allowance levels, credit loss assumptions are estimated using a model that categorizes loan pools based on loss history, credit and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. The Company has determined a four consecutive quarter forecasting period is a reasonable and supportable period. Expected credit loss for periods beyond reasonable and supportable forecast periods are determined based on a reversion method which reverts back to historical loss estimate over a four consecutive quarter period on a straight-line basis. Credit quality is assessed and monitored by evaluating various attributes and the results of those evaluations are utilized in underwriting new loans and the process for estimating the expected credit losses. The following paragraphs describe the risk characteristics relevant to each portfolio segment. Residential Real Estate. Residential real estate loans are secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan segment include a large number of borrowers, geographic dispersion of market areas and the loans are originated for relatively smaller amounts. Commercial Real Estate . Commercial real estate loans typically involve larger principal amounts, and repayment of these loans is generally dependent on the successful operation of the property securing the loan and/or the business conducted on the property securing the loan. Credit risk in these loans is impacted by the creditworthiness of a borrower, valuation of the property securing the loan and conditions within the local economies in the Company’s diverse, geographic market areas. Commercial . Commercial loans consist of loans to commercial customers for use in financing working capital needs, equipment purchases and business expansions. The loans in this category are repaid primarily from the cash flow of a borrower’s principal business operation. Credit risk in these loans is driven by creditworthiness of a borrower and the economic conditions that impact the cash flow stability from business operations across the Company’s diverse, geographic market areas. Home Equity . Home equity loans consist of junior lien mortgages and first and junior lien lines of credit (revolving open-end and amortizing closed-end) secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan segment are a large number of borrowers, geographic dispersion of market areas and the loans are originated for terms that range from 10 to 15 years. Other Consumer . The other consumer loan portfolio consists of various short-term loans such as automobile loans and loans for other personal purposes. Repayment of these loans is primarily dependent on the personal income of the borrowers. Credit risk is driven by consumer economic factors (such as unemployment and general economic conditions in the Company’s diverse, geographic market area) and the creditworthiness of a borrower. The allowance is impacted by loan volumes, delinquency status, credit ratings, historical loss experiences, estimated prepayment speeds, weighted average lives and other conditions influencing loss expectations, such as reasonable and supportable forecasts of economic conditions. The methodology for estimating the amount of expected credit losses reported in the allowance has two basic components: 1) individual loans that do not share similar risk characteristics with other loans and the measurement of expected credit losses for such individual loans; and 2) the expected credit losses for pools of loans that share similar risk characteristics. Loans that do not Share Similar Risk Characteristics with Other Loans. For a loan that does not share similar risk characteristics with other loans, expected credit loss is measured based on the net realizable value, that is, the difference between the discounted value of the expected future cash flows, based on the original effective interest rate, and the amortized cost basis of the loan. For these loans, the expected credit loss is equal to the amount by which the net realizable value of the loan is less than the amortized cost basis of the loan (which is net of previous charge-offs and deferred loan fees and costs), except when the loan is collateral-dependent, that is, when foreclosure is probable or the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. In these cases, expected credit loss is measured as the difference between the amortized cost basis of the loan and the fair value of the collateral. The fair value of the collateral is adjusted for the estimated cost to sell if repayment or satisfaction of a loan is dependent on the sale (rather than only on the operation) of the collateral. The Company has determined that non-accrual loans do not share similar risk characteristics with other loans and these loans are individually evaluated for estimated allowance for credit losses. The Company, through its credit monitoring process, may also identify other loans that do not share similar risk characteristics and individually evaluate such loans. The starting point for determining the fair value of collateral is to obtain external appraisals or evaluations (new or updated). The valuation techniques used in preparing appraisals or evaluations (new or updated) include the cost approach, income approach, sales comparison approach, or a combination of the preceding valuation techniques. The Company’s credit department reviews appraisals, giving consideration to the highest and best use of the collateral. The appraisals or evaluations (new or updated) are reviewed at least quarterly and more frequently based on current market conditions, including deterioration in a borrower’s financial condition and when property values may be subject to significant volatility. Adjustments may be made to the fair value of the collateral after review and acceptance of the collateral appraisal or evaluation (new or updated). Loans that Share Similar Risk Characteristics with other Loans. For estimating the allowance for loans that share similar risk characteristics with other loans, such loans are segregated into loan segments. Loans are designated into loan segments based on loans pooled by product types and similar risk characteristics or areas of risk concentration. In determining the ACL, the Company derives an estimated credit loss assumption from a model that categorizes loan pools based on loan type which is further segregated by the credit quality indicators. This model calculates an expected loss percentage for each loan segment by considering the non-discounted simple annual average historical loss rate of each loan segment (calculated through an “open pool” method), multiplying the loss rate by the amortized loan balance and incorporating that segment’s internally generated prepayment speed assumption and contractually scheduled remaining principal pay downs on a loan level basis. The annual historical loss rates are adjusted over a reasonable economic forecast period by a multiplier that is calculated based upon current national economic forecasts as a proportion of each segment’s historical average loss levels. The Company will then revert from the economic forecast period back to the historical average loss rate in a straight-line basis. After the reversion period, the loans will be assumed to experience their historical loss rate for the remainder of their contractual lives. The model applies the expected loss rate over the projected cash flows at the individual loan level and then aggregates the losses by loan segment in determining their quantitative allowance. The Company will also include qualitative adjustments to adjust the ACL on loan segments to the extent the current or future market conditions are believed to vary substantially from historical conditions in regards to: • lending policies and procedures; • i nternational, national, regional and local economic business conditions and developments that affect the collectability of the portfolio, including the condition of various markets; • the nature and volume of the loan portfolio including the terms of the loans; • the experience, ability, and depth of the lending management and other relevant staff; • the volume and severity of past due and adversely classified or graded loans and the volume of non-accrual loans; • the quality of our loan review system; • the value of underlying collateral for collateralized loans; • the existence and effect of any concentrations of credit, and changes in the level of concentrations; and • the effect of external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the existing portfolio. The Company regularly reviews loans in the portfolio to assess credit quality indicators and to determine the appropriate loan classification and grading in accordance with applicable bank regulations. The primary credit quality indicator for residential, home equity and other consumer loans is the days past due status, which consists of the following categories: 1) performing loans; 2) 30 to 89 days past due loans; and 3) non-accrual and ninety days or more past due loans. The primary credit quality indicator for commercial real estate and commercial loans is the Company’s internal risk rating system, which includes the following categories: 1) pass loans; 2) special mention loans; 3) substandard loans; and 4) doubtful or loss loans. Such credit quality indicators are regularly monitored and incorporated into the Company’s allowance estimate. The following paragraphs further define the internal risk ratings for commercial real estate and commercial loans. Pass Loans. These ratings represent loans that are of acceptable, good or excellent quality with very limited to no risk. Loans that do not have one of the following ratings are considered pass loans. Special Mention Loans. These ratings represent loans that are designated as special mention per the regulatory definition. Special mention loans are currently protected but are potentially weak. The credit risk may be relatively minor yet constitute an undue and unwarranted risk in light of the circumstances surrounding a specific loan. The rating may be used to identify credit with potential weaknesses that if not corrected may weaken the loan to the point of inadequately protecting the Bank’s credit position. Examples include a lack of supervision, inadequate loan agreement, condition, or control of collateral, incomplete, or improper documentation, deviations from lending policy, and adverse trends in operations or economic conditions. Substandard Loans. This rating represents loans that are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged. A loan so classified must have a well-defined weakness that jeopardizes the liquidation of the debt. These loans are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. Loss potential, while existing in the aggregated amount of substandard loans, does not have to exist in an individual loan classified substandard. Doubtful/Loss Loans. A loan classified as doubtful has the characteristics that make collection in full, on the basis of currently existing facts, conditions, and values, highly improbable. The possibility of loss is extremely high, but because of pending factors, which may work to the advantage and strengthening of the loan, its classification as loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral and refinancing plans. Loans are classified as loss when they are deemed to be not collectible and of such little value that continuance as an active asset of the Bank is not warranted. Loans classified as loss must be charged-off. Assignment of this classification does not mean that an asset has absolutely no recovery or salvage value, but that it is not practical or desirable to defer writing off a basically worthless asset, even though partial recovery may be attained in the future. Restructured Loans A restructured loan is considered a troubled debt restructuring (“TDR”) if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. The Company periodically enters into restructure agreements with borrowers whereby the loans were previously identified as TDRs. When such circumstances occur, the Company carefully evaluates the facts of the subsequent restructure to determine the appropriate accounting and under certain circumstances it may be acceptable not to account for the subsequently restructured loan as a TDR. When assessing whether a concession has been granted by the Company, any prior forgiveness on a cumulative basis is considered a continuing concession. The Company has made the following types of loan modifications, some of which were considered a TDR: • reduction of the stated interest rate for the remaining term of the debt; • extension of the maturity date(s) at a stated rate of interest lower than the current market rate for newly originated debt having similar risk characteristics; and • reduction of the face amount of the debt as stated in the debt agreements. The Company recognizes that while borrowers may experience deterioration in their financial condition, many continue to be creditworthy borrowers who have the willingness and capacity for debt repayment. In determining whether non-restructured or performing loans issued to a single or related party group of borrowers should continue to accrue inter

Debt Securities

Debt Securities	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Debt Securities	Debt Securities The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of the Company’s debt securities: September 30, 2021 (Dollars in thousands) Amortized Gross Gross Fair Available-for-sale U.S. government and federal agency $ 31,449 207 (283) 31,373 U.S. government sponsored enterprises 47,324 6 (279) 47,051 State and local governments 479,116 29,666 (91) 508,691 Corporate bonds 191,164 6,958 (3) 198,119 Residential mortgage-backed securities 5,498,676 13,982 (21,313) 5,491,345 Commercial mortgage-backed securities 1,081,008 36,640 (3,647) 1,114,001 Total available-for-sale $ 7,328,737 87,459 (25,616) 7,390,580 Held-to-maturity State and local governments $ 1,128,299 20,131 (1,977) 1,146,453 Total held-to-maturity $ 1,128,299 20,131 (1,977) 1,146,453 December 31, 2020 (Dollars in thousands) Amortized Gross Gross Fair Available-for-sale U.S. government and federal agency $ 38,568 287 (267) 38,588 U.S. government sponsored enterprises 9,747 34 — 9,781 State and local governments 1,321,763 94,974 (54) 1,416,683 Corporate bonds 336,867 12,239 (8) 349,098 Residential mortgage-backed securities 2,261,463 27,631 (4) 2,289,090 Commercial mortgage-backed securities 1,177,458 57,575 (459) 1,234,574 Total available-for-sale $ 5,145,866 192,740 (792) 5,337,814 Held-to-maturity State and local governments $ 189,836 13,380 — 203,216 Total held-to-maturity $ 189,836 13,380 — 203,216 Maturity Analysis The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at September 30, 2021. Actual maturities may differ from expected or contractual maturities since some issuers have the right to prepay obligations with or without prepayment penalties. September 30, 2021 Available-for-Sale Held-to-Maturity (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 68,088 68,877 1,529 1,544 Due after one year through five years 186,292 195,336 27,382 29,114 Due after five years through ten years 250,903 259,085 89,010 94,026 Due after ten years 243,770 261,936 1,010,378 1,021,769 749,053 785,234 1,128,299 1,146,453 Mortgage-backed securities 1 6,579,684 6,605,346 — — Total $ 7,328,737 7,390,580 1,128,299 1,146,453 ______________________________ 1 Mortgage-backed securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds. Sales and Calls of Debt Securities Proceeds from sales and calls of debt securities and the associated gains and losses that have been included in earnings are listed below: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Available-for-sale Proceeds from sales and calls of debt securities $ 74,328 69,304 151,025 184,088 Gross realized gains 1 507 102 945 1,206 Gross realized losses 1 (9) (78) (75) (192) Held-to-maturity Proceeds from calls of debt securities 19,120 9,280 25,480 29,530 Gross realized gains 1 — — — 1 Gross realized losses 1 (666) — (815) — ______________________________ 1 The gain or loss on the sale or call of each debt security is determined by the specific identification method. Allowance for Credit Losses - Available-For-Sale Debt Securities In assessing whether a credit loss existed on available-for-sale debt securities with unrealized losses, the Company compared the present value of cash flows expected to be collected from the debt securities with the amortized cost basis of the debt securities. In addition, the following factors were evaluated individually and collectively in determining the existence of expected credit losses: • credit ratings from Nationally Recognized Statistical Rating Organizations (“NRSRO” entities such as Standard and Poor’s [“S&P”] and Moody’s); • extent to which the fair value is less than cost; • adverse conditions, if any, specifically related to the impaired securities, including the industry and geographic area; • the overall deal and payment structure of the debt securities, including the investor entity’s position within the structure, underlying obligors, financial condition and near-term prospects of the issuer, including specific events which may affect the issuer’s operations or future earnings, and credit support or enhancements; and • failure of the issuer and underlying obligors, if any, to make scheduled payments of interest and principal. The following table summarizes available-for-sale debt securities that were in an unrealized loss position for which an ACL has not been recorded, based on the length of time the individual securities have been in an unrealized loss position. The number of available-for-sale debt securities in an unrealized position is also disclosed. September 30, 2021 Number Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale U.S. government and federal agency 23 $ 9,736 (78) 5,398 (205) 15,134 (283) U.S. government sponsored enterprises 3 45,279 (279) — — 45,279 (279) State and local governments 11 15,596 (30) 1,742 (61) 17,338 (91) Corporate bonds 1 5,016 (3) — — 5,016 (3) Residential mortgage-backed securities 115 3,730,195 (21,312) 26 (1) 3,730,221 (21,313) Commercial mortgage-backed securities 21 79,332 (866) 114,338 (2,781) 193,670 (3,647) Total available-for-sale 174 $ 3,885,154 (22,568) 121,504 (3,048) 4,006,658 (25,616) Held-to-maturity State and local governments 126 $ 317,479 (1,977) — — 317,479 (1,977) Total held-to-maturity 126 $ 317,479 (1,977) — — 317,479 (1,977) December 31, 2020 Number Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale U.S. government and federal agency 18 $ 13,814 (258) 726 (9) 14,540 (267) State and local governments 6 3,121 (54) — — 3,121 (54) Corporate bonds 3 5,500 (8) — — 5,500 (8) Residential mortgage-backed securities 14 2,354 (4) 27 — 2,381 (4) Commercial mortgage-backed securities 5 120,741 (459) — — 120,741 (459) Total available-for-sale 46 $ 145,530 (783) 753 (9) 146,283 (792) With respect to severity, the majority of available-for-sale debt securities with unrealized loss positions at September 30, 2021 have unrealized losses as a percentage of book value of less than five percent. A substantial portion of such securities were issued by Federal National Mortgage Association (“Fannie Mae”), Federal Home Loan Mortgage Corporation (“Freddie Mac”), Government National Mortgage Association (“Ginnie Mae”) and other agencies of the U.S. government or have credit ratings issued by one or more of the NRSRO entities in the four highest credit rating categories. All of the Company’s available-for-sale debt securities with unrealized loss positions at September 30, 2021 have been determined to be investment grade. The Company did not have any past due available-for-sale debt securities as of September 30, 2021 and December 31, 2020, respectively. Accrued interest receivable on available-for-sale debt securities totaled $17,791,000 and $20,215,000 at September 30, 2021, and December 31, 2020, respectively, and was excluded from the estimate of credit losses. Based on an analysis of its available-for-sale debt securities with unrealized losses as of September 30, 2021, the Company determined the decline in value was unrelated to credit losses and was primarily the result of changes in interest rates and market spreads subsequent to acquisition. The fair value of the debt securities is expected to recover as payments are received and the debt securities approach maturity. In addition, as of September 30, 2021, management determined it did not intend to sell available-for-sale debt securities with unrealized losses, and there was no expected requirement to sell such securities before recovery of their amortized cost. As a result, no ACL was recorded on available-for-sale debt securities at September 30, 2021. As part of this determination, the Company considered contractual obligations, regulatory constraints, liquidity, capital, asset/liability management and securities portfolio objectives and whether or not any of the Company’s investment securities were managed by third-party investment funds. Allowance for Credit Losses - Held-To-Maturity Debt Securities The Company measured expected credit losses on held-to-maturity debt securities on a collective basis by major security type and NRSRO credit ratings, which is the Company’s primary credit quality indicator for state and local government securities. The estimate of expected credit losses considered historical credit loss information that was adjusted for current conditions as well as reasonable and supportable forecasts. The following table summarizes the amortized cost of held-to-maturity debt securities aggregated by NRSRO credit rating: (Dollars in thousands) September 30, December 31, Held-to-maturity S&P: AAA / Moody’s: Aaa $ 274,791 39,022 S&P: AA+, AA, AA- / Moody’s: Aa1, Aa2, Aa3 812,759 123,664 S&P: A+, A, A- / Moody’s: A1, A2, A3 38,739 27,150 S&P: BBB+, BBB, BBB- / Moody’s: Baa1, Baa2, Baa3 — — Not rated by either entity 2,010 — Below investment grade — — Total held-to-maturity $ 1,128,299 189,836 The Company’s held-to-maturity debt securities portfolio is primarily comprised of general obligation and revenue bonds with NRSRO ratings in the four highest credit rating categories. All of the Company’s held-to-maturity debt securities at September 30, 2021 have been determined to be investment grade. As of September 30, 2021 and December 31, 2020, the Company did not have any held-to-maturity debt securities past due. Accrued interest receivable on held-to-maturity debt securities totaled $11,664,000 and $1,728,000 at September 30, 2021 and December 31, 2020, respectively, and were excluded from the estimate of credit losses. Based on the Company’s evaluation, an insignificant amount of credit losses is expected on the held-to-maturity debt securities portfolio; therefore, no ACL was recorded at September 30, 2021 or December 31, 2020.

Loans Receivable, Net

Loans Receivable, Net	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans Receivable, Net	Loans Receivable, Net On January 1, 2020, the Company adopted FASB ASU 2016-13, Financial Instruments - Credit Losses , which significantly changed the loan and allowance for credit loss accounting disclosures. The following loan and allowance for credit loss accounting disclosures are presented in accordance with ASC Topic 326. The following table presents loans receivable for each portfolio segment of loans: (Dollars in thousands) September 30, December 31, Residential real estate $ 781,538 802,508 Commercial real estate 6,912,569 6,315,895 Other commercial 2,598,616 3,054,817 Home equity 660,920 636,405 Other consumer 340,248 313,071 Loans receivable 11,293,891 11,122,696 Allowance for credit losses (153,609) (158,243) Loans receivable, net $ 11,140,282 10,964,453 Net deferred origination (fees) costs included in loans receivable $ (26,325) (26,709) Net purchase accounting (discounts) premiums included in loans receivable $ (12,458) (17,091) Accrued interest receivable on loans $ 50,229 53,538 Substantially all of the Company’s loans receivable are with borrowers in the Company’s geographic market areas. Although the Company has a diversified loan portfolio, a substantial portion of borrowers’ ability to service their obligations is dependent upon the economic performance in the Company’s market areas. The Company had no significant purchases or sales of portfolio loans or reclassification of loans held for investment to loans held for sale during the nine months ended September 30, 2021. Allowance for Credit Losses - Loans Receivable The ACL is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected on loans. The following tables summarize the activity in the ACL: Three Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 151,448 10,143 96,597 31,983 7,837 4,888 Provision for credit losses 2,313 1,703 2,931 (3,321) (124) 1,124 Charge-offs (2,620) — (162) (677) — (1,781) Recoveries 2,468 13 672 860 152 771 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Three Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 162,509 9,986 89,104 48,838 9,962 4,619 Provision for credit losses 2,869 (216) 5,208 1,199 (2,526) (796) Charge-offs (2,630) — (445) (1,598) (99) (488) Recoveries 1,804 35 530 314 93 832 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167 Nine Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 158,243 9,604 86,999 49,133 8,182 4,325 Provision for credit losses (2,921) 2,005 11,663 (18,905) (491) 2,807 Charge-offs (8,566) (38) (203) (3,790) (45) (4,490) Recoveries 6,853 288 1,579 2,407 219 2,360 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Nine Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 124,490 10,111 69,496 36,129 4,937 3,817 Impact of adopting CECL 3,720 3,584 10,533 (13,759) 3,400 (38) Acquisitions 49 — 49 — — Provision for credit losses 39,165 (3,923) 14,084 28,358 (860) 1,506 Charge-offs (7,865) (21) (625) (3,471) (293) (3,455) Recoveries 4,993 54 860 1,496 246 2,337 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167 During the nine months ended September 30, 2021, the ACL decreased primarily as a result of an improvement in the quantitative factors including the economic forecasts along with adjustments to qualitative factors. The sizeable charge-offs in the other consumer loan segment is driven by deposit overdraft charge-offs which typically experience high charge-off rates and the amounts were comparable to historical trends. The other segments experience routine charge-offs and recoveries, with occasional large credit relationships charge-offs and recoveries that cause fluctuations from prior periods. During the nine months ended September 30, 2021, there have been no significant changes to the types of collateral securing collateral-dependent loans. Aging Analysis The following tables present an aging analysis of the recorded investment in loans: September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other Accruing loans 30-59 days past due $ 9,541 — 2,662 2,071 2,438 2,370 Accruing loans 60-89 days past due 16,461 1,137 13,538 862 656 268 Accruing loans 90 days or more past due 5,172 52 2,785 2,083 98 154 Non-accrual loans with no ACL 24,989 2,173 10,144 9,753 2,406 513 Non-accrual loans with ACL 20,912 292 474 20,041 51 54 Total past due and non-accrual loans 77,075 3,654 29,603 34,810 5,649 3,359 Current loans receivable 11,216,816 777,884 6,882,966 2,563,806 655,271 336,889 Total loans receivable $ 11,293,891 781,538 6,912,569 2,598,616 660,920 340,248 December 31, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other Accruing loans 30-59 days past due $ 17,123 6,058 3,854 4,039 2,130 1,042 Accruing loans 60-89 days past due 5,598 584 2,299 809 756 1,150 Accruing loans 90 days or more past due 1,725 934 231 293 135 132 Non-accrual loans with no ACL 29,532 3,129 14,030 9,231 2,664 478 Non-accrual loans with ACL 2,432 274 1,787 278 49 44 Total past due and non-accrual loans 56,410 10,979 22,201 14,650 5,734 2,846 Current loans receivable 11,066,286 791,529 6,293,694 3,040,167 630,671 310,225 Total loans receivable $ 11,122,696 802,508 6,315,895 3,054,817 636,405 313,071 The Company had $472,000 and $628,000 of interest reversed on non-accrual loans during the nine months ended September 30, 2021 and September 30, 2020, respectively. The prior year modifications that were made under the CARES Act, along with related regulatory guidance, are included in current loan receivables. Collateral-Dependent Loans A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. The collateral on the loans is a significant portion of what secures the collateral-dependent loans and significant changes to the fair value of the collateral can impact the ACL. During 2021, there were no significant change to collateral which secures the collateral-dependent loans, whether due to general deterioration or other reasons. The following table presents the amortized cost basis of collateral-dependent loans by collateral type: September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other Business assets $ 26,992 — 60 26,932 — — Residential real estate 5,558 2,412 569 126 2,276 175 Other real estate 24,255 646 20,976 2,114 181 338 Other 12,728 — — 12,390 — 338 Total $ 69,533 3,058 21,605 41,562 2,457 851 December 31, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other Business assets $ 4,325 — 37 4,288 — — Residential real estate 7,148 3,338 1,043 198 2,513 56 Other real estate 16,127 64 14,738 1,086 200 39 Other 36,855 — — 36,469 — 386 Total $ 64,455 3,402 15,818 42,041 2,713 481 Restructured Loans A restructured loan is considered a TDR if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. There were no TDRs that occurred during the three months ended September 30 ,2021. The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented: Three Months ended September 30, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 6 — 5 1 — — Pre-modification recorded balance $ 7,482 — 6,648 834 — — Post-modification recorded balance $ 7,482 — 6,648 834 — — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 10 1 5 3 — 1 Pre-modification recorded balance $ 2,368 210 1,473 554 — 131 Post-modification recorded balance $ 2,368 210 1,473 554 — 131 TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 16 1 10 4 1 — Pre-modification recorded balance $ 14,945 210 13,392 1,304 39 — Post-modification recorded balance $ 14,945 210 13,392 1,304 39 — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — The modifications for the loans designated as TDRs during the nine months ended September 30, 2021 and 2020 included one or a combination of the following: an extension of the maturity date, a reduction of the interest rate or a reduction in the principal amount. In addition to the loans designated as TDRs during the period provided in the preceding tables, the Company had TDRs with pre-modification loan balances of $1,624,000 and $2,265,000 for the nine months ended September 30, 2021 and 2020, respectively, for which OREO was received in full or partial satisfaction of the loans. The majority of such TDRs were in consumer for the nine months ended September 30, 2021 and commercial real estate for the nine months ended September 30, 2020. At September 30, 2021 and December 31, 2020, the Company had $83,000 and $548,000, respectively, of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process. At September 30, 2021 and December 31, 2020, the Company had $88,000 and $273,000, respectively, of OREO secured by residential real estate properties. The Company also modified loans under the CARES Act, along with related regulatory guidance, that were not classified as TDRs. In addition, the state of Montana created the Montana Loan Deferment Program for only Montana-based business that utilized Cares Act funds to provide interest payments upfront on behalf of participating borrowers. The Montana Loan Deferment Program provided modifications for customers under the CARES Act that were not classified as TDRs. Credit Quality Indicators The Company categorizes commercial real estate and other commercial loans into risk categories based on relevant information about the ability of borrowers to service their obligations. The following tables present the amortized cost in commercial real estate and other commercial loans based on the Company’s internal risk rating. The date of a modification, renewal or extension of a loan is considered for the year of origination if the terms of the loan are as favorable to the Company as the terms are for a comparable loan to other borrowers with similar credit risk. September 30, 2021 (Dollars in thousands) Total Pass Special Mention Substandard Doubtful/ Commercial real estate loans Term loans by origination year 2021 (year-to-date) $ 1,665,923 1,664,908 — 1,015 — 2020 1,310,854 1,306,097 — 4,757 — 2019 883,727 872,635 — 11,092 — 2018 748,629 695,068 — 53,561 — 2017 558,997 531,073 — 27,924 — Prior 1,598,606 1,547,558 — 51,023 25 Revolving loans 145,833 142,781 — 3,051 1 Total $ 6,912,569 6,760,120 — 152,423 26 Other commercial loans 1 Term loans by origination year 2021 (year-to-date) $ 694,243 690,542 — 3,701 — 2020 477,065 461,088 — 15,976 1 2019 239,843 230,852 — 8,988 3 2018 184,542 178,564 — 5,977 1 2017 215,294 214,143 — 1,148 3 Prior 314,426 300,084 — 13,792 550 Revolving loans 473,203 443,561 — 29,626 16 Total $ 2,598,616 2,518,834 — 79,208 574 ___________________________ 1 Includes PPP loans. December 31, 2020 (Dollars in thousands) Total Pass Special Mention Substandard Doubtful/ Commercial real estate loans Term loans by origination year 2020 $ 1,496,094 1,490,947 — 5,147 — 2019 1,077,461 1,069,503 — 7,958 — 2018 914,506 874,673 — 39,833 — 2017 723,448 696,371 — 27,077 — 2016 496,275 481,392 — 14,883 — Prior 1,488,281 1,450,596 — 37,574 111 Revolving loans 119,830 116,548 — 3,282 — Total $ 6,315,895 6,180,030 — 135,754 111 Other commercial loans 1 Term loans by origination year 2020 $ 1,366,664 1,341,316 19,564 5,784 — 2019 304,430 284,981 12,582 6,864 3 2018 241,222 234,988 — 6,233 1 2017 269,857 264,651 — 5,114 92 2016 179,225 177,164 — 2,056 5 Prior 218,306 206,431 — 11,329 546 Revolving loans 475,113 467,929 54 7,112 18 Total $ 3,054,817 2,977,460 32,200 44,492 665 ______________________________ 1 Includes PPP loans. For residential real estate, home equity and other consumer loan segments, the Company evaluates credit quality primarily on the aging status of the loan. The following tables present the amortized cost in residential real estate, home equity and other consumer loans based on payment performance: September 30, 2021 (Dollars in thousands) Total Performing 30-89 Days Past Due Non-Accrual and 90 Days or More Past Due Residential real estate loans Term loans by origination year 2021 (year-to-date) $ 256,012 256,012 — — 2020 177,765 177,617 148 — 2019 78,061 78,061 — — 2018 56,371 56,088 — 283 2017 50,489 49,418 892 179 Prior 160,662 158,510 97 2,055 Revolving loans 2,178 2,178 — — Total $ 781,538 777,884 1,137 2,517 Home equity loans Term loans by origination year 2021 (year-to-date) $ 38 38 — — 2020 67 67 — — 2019 589 555 — 34 2018 887 887 — — 2017 783 783 — — Prior 10,780 10,114 161 505 Revolving loans 647,776 642,827 2,933 2,016 Total $ 660,920 655,271 3,094 2,555 Other consumer loans Term loans by origination year 2021 (year-to-date) $ 127,963 127,893 65 5 2020 87,303 87,072 189 42 2019 42,347 41,943 172 232 2018 23,468 23,180 94 194 2017 9,548 9,495 42 11 Prior 19,132 16,871 2,042 219 Revolving loans 30,487 30,435 34 18 Total $ 340,248 336,889 2,638 721 December 31, 2020 (Dollars in thousands) Total Performing 30-89 Days Past Due Non-Accrual and 90 Days or More Past Due Residential real estate loans Term loans by origination year 2020 $ 208,679 207,432 1,247 — 2019 181,924 179,915 2,009 — 2018 100,273 99,135 556 582 2017 76,394 75,527 867 — 2016 53,819 52,905 87 827 Prior 179,085 174,281 1,876 2,928 Revolving loans 2,334 2,334 — — Total $ 802,508 791,529 6,642 4,337 Home equity loans Term loans by origination year 2020 $ 89 89 — — 2019 807 771 — 36 2018 1,782 1,782 — — 2017 1,452 1,426 26 — 2016 1,016 1,016 — — Prior 14,025 13,042 463 520 Revolving loans 617,234 612,545 2,397 2,292 Total $ 636,405 630,671 2,886 2,848 Other consumer loans Term loans by origination year 2020 $ 131,302 131,098 158 46 2019 66,327 65,921 170 236 2018 42,827 42,557 212 58 2017 16,287 16,202 38 47 2016 10,519 10,409 48 62 Prior 18,692 17,334 1,155 203 Revolving loans 27,117 26,704 411 2 Total $ 313,071 310,225 2,192 654

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	Leases The Company leases certain land, premises and equipment from third parties. ROU assets for operating and finance leases are included in net premises and equipment and lease liabilities are included in other liabilities and other borrowed funds, respectively, on the Company’s statements of financial condition. The following table summarizes the Company’s leases: September 30, 2021 December 31, 2020 (Dollars in thousands) Finance Operating Finance Operating ROU assets $ 5,999 5,999 Accumulated depreciation (457) (273) Net ROU assets $ 5,542 44,480 5,726 46,820 Lease liabilities $ 5,810 47,590 5,891 49,675 Weighted-average remaining lease term 23 years 17 years 24 years 17 years Weighted-average discount rate 2.6 % 3.5 % 2.6 % 3.4 % Maturities of lease liabilities consist of the following: September 30, 2021 (Dollars in thousands) Finance Operating Maturing within one year $ 66 1,219 Maturing one year through two years 266 4,625 Maturing two years through three years 272 3,973 Maturing three years through four years 280 3,932 Maturing four years through five years 285 3,859 Thereafter 6,736 47,447 Total lease payments 7,905 65,055 Present value of lease payments Short-term 28 1,527 Long-term 5,782 46,063 Total present value of lease payments 5,810 47,590 Difference between lease payments and present value of lease payments $ 2,095 17,465 The components of lease expense consist of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Finance lease cost Amortization of ROU assets $ 61 59 184 174 Interest on lease liabilities 38 40 113 121 Operating lease cost 1,302 1,254 3,883 3,553 Short-term lease cost 93 88 261 266 Variable lease cost 264 264 759 977 Sublease income (11) (2) (32) (5) Total lease expense $ 1,747 1,703 5,168 5,086 Supplemental cash flow information related to leases is as follows: Three Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 38 813 40 706 Financing cash flows 27 N/A 23 N/A Nine Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 113 2,379 121 1,994 Financing cash flows 81 N/A 67 N/A
Leases	Leases The Company leases certain land, premises and equipment from third parties. ROU assets for operating and finance leases are included in net premises and equipment and lease liabilities are included in other liabilities and other borrowed funds, respectively, on the Company’s statements of financial condition. The following table summarizes the Company’s leases: September 30, 2021 December 31, 2020 (Dollars in thousands) Finance Operating Finance Operating ROU assets $ 5,999 5,999 Accumulated depreciation (457) (273) Net ROU assets $ 5,542 44,480 5,726 46,820 Lease liabilities $ 5,810 47,590 5,891 49,675 Weighted-average remaining lease term 23 years 17 years 24 years 17 years Weighted-average discount rate 2.6 % 3.5 % 2.6 % 3.4 % Maturities of lease liabilities consist of the following: September 30, 2021 (Dollars in thousands) Finance Operating Maturing within one year $ 66 1,219 Maturing one year through two years 266 4,625 Maturing two years through three years 272 3,973 Maturing three years through four years 280 3,932 Maturing four years through five years 285 3,859 Thereafter 6,736 47,447 Total lease payments 7,905 65,055 Present value of lease payments Short-term 28 1,527 Long-term 5,782 46,063 Total present value of lease payments 5,810 47,590 Difference between lease payments and present value of lease payments $ 2,095 17,465 The components of lease expense consist of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Finance lease cost Amortization of ROU assets $ 61 59 184 174 Interest on lease liabilities 38 40 113 121 Operating lease cost 1,302 1,254 3,883 3,553 Short-term lease cost 93 88 261 266 Variable lease cost 264 264 759 977 Sublease income (11) (2) (32) (5) Total lease expense $ 1,747 1,703 5,168 5,086 Supplemental cash flow information related to leases is as follows: Three Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 38 813 40 706 Financing cash flows 27 N/A 23 N/A Nine Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 113 2,379 121 1,994 Financing cash flows 81 N/A 67 N/A

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The following schedule discloses the changes in the carrying value of goodwill: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net carrying value at beginning of period $ 514,013 513,355 514,013 456,418 Acquisitions and adjustments — 658 — 57,595 Net carrying value at end of period $ 514,013 514,013 514,013 514,013

Loan Servicing

Loan Servicing	9 Months Ended
	Sep. 30, 2021
Mortgage Banking [Abstract]
Loan Servicing	Loan Servicing Mortgage loans that are serviced for others are not reported as assets, only the servicing rights are recorded and included in other assets. The following schedules disclose the change in the carrying value of mortgage servicing rights that is included in other assets, principal balances of loans serviced and the fair value of mortgage servicing rights: (Dollars in thousands) September 30, December 31, Carrying value at beginning of period $ 8,976 1,618 Additions 3,996 8,298 Amortization (1,327) (940) Carrying value at end of period $ 11,645 8,976 Principal balances of loans serviced for others $ 1,511,199 1,269,080 Fair value of servicing rights $ 15,477 12,087 The following table summarizes the carrying value of the Company’s securities sold under agreements to repurchase (“repurchase agreements”) by remaining contractual maturity of the agreements and category of collateral: Overnight and Continuous (Dollars in thousands) September 30, December 31, State and local governments $ 118,957 787,016 Corporate bonds 137,461 217,567 Residential mortgage-backed securities 773,204 — Commercial mortgage-backed securities 11,317 — Total $ 1,040,939 1,004,583

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entities	Variable Interest Entities A VIE is a partnership, limited liability company, trust or other legal entity that meets one of the following criteria: 1) the entity’s equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support from other parties; 2) the holders of the equity investment at risk, as a group, lack the characteristics of a controlling financial interest; and 3) the voting rights of some holders of the equity investment at risk are disproportionate to their obligation to absorb losses or receive returns, and substantially all of the activities are conducted on behalf of the holder of equity investment at risk with disproportionately few voting rights. A VIE must be consolidated by the Company if it is deemed to be the primary beneficiary, which is the party involved with the VIE that has both: 1) the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance; and 2) the obligation to absorb the losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company’s VIEs are regularly monitored to determine if any reconsideration events have occurred that could cause the primary beneficiary status to change. A previously unconsolidated VIE is consolidated when the Company becomes the primary beneficiary. A previously consolidated VIE is deconsolidated when the Company ceases to be the primary beneficiary or the entity is no longer a VIE. Consolidated Variable Interest Entities The Company has equity investments in Certified Development Entities (“CDE”) which have received allocations of New Markets Tax Credits (“NMTC”). The NMTC program provides federal tax incentives to investors to make investments in distressed communities and promotes economic improvements through the development of successful businesses in these communities. The NMTC is available to investors over seven years and is subject to recapture if certain events occur during such period. The maximum exposure to loss in the CDEs is the amount of equity invested and credit extended by the Company. However, the Company has credit protection in the form of indemnification agreements, guarantees, and collateral arrangements. The Company has evaluated the variable interests held by the Company in each CDE (NMTC) investment and determined the Company does not individually meet the characteristics of a primary beneficiary; however, the related-party group does meet the criteria as a group and substantially all of the activities of the CDEs either involve or are conducted on behalf of the Company. As a result, the Company is the primary beneficiary of the CDEs and their assets, liabilities, and results of operations are included in the Company’s consolidated financial statements. The primary activities of the CDEs are recognized in commercial loans interest income and other borrowed funds interest expense on the Company’s statements of operations and the federal income tax credit allocations from the investments are recognized in the Company’s statements of operations as a component of income tax expense. Such related cash flows are recognized in loans originated, principal collected on loans and change in other borrowed funds. The Bank is also the sole member of certain tax credit funds that make direct investments in qualified affordable housing projects (e.g., Low-Income Housing Tax Credit [“LIHTC”] partnerships). As such, the Company is the primary beneficiary of these tax credit funds and their assets, liabilities, and results of operations are included in the Company’s consolidated financial statements. The following table summarizes the carrying amounts of the consolidated VIEs’ assets and liabilities included in the Company’s statements of financial condition and are adjusted for intercompany eliminations. All assets presented can be used only to settle obligations of the consolidated VIEs and all liabilities presented consist of liabilities for which creditors and other beneficial interest holders therein have no recourse to the general credit of the Company. (Dollars in thousands) September 30, December 31, Assets Loans receivable $ 108,717 90,183 Accrued interest receivable 603 410 Other assets 41,135 40,282 Total assets $ 150,455 130,875 Liabilities Other borrowed funds $ 27,861 27,176 Accrued interest payable 174 53 Other liabilities 51 171 Total liabilities $ 28,086 27,400 Unconsolidated Variable Interest Entities The Company has equity investments in LIHTC partnerships, both directly and through tax credit funds, with carrying values of $49,074,000 and $45,953,000 as of September 30, 2021 and December 31, 2020, respectively. The LIHTCs are indirect federal subsidies to finance low-income housing and are used in connection with both newly constructed and renovated residential rental buildings. Once a project is placed in service, it is generally eligible for the tax credit for ten years. To continue generating the tax credit and to avoid tax credit recapture, a LIHTC building must satisfy specific low-income housing compliance rules for a full fifteen years. The maximum exposure to loss in the VIEs is the amount of equity invested and credit extended by the Company. However, the Company has credit protection in the form of indemnification agreements, guarantees, and collateral arrangements. The Company has evaluated the variable interests held by the Company in each LIHTC investment and determined that the Company does not have controlling financial interests in such investments, and is not the primary beneficiary. The Company reports the investments in the unconsolidated LIHTCs as other assets on the Company’s statements of financial condition. There were no impairment losses on the Company’s LIHTC investments during the nine months ended September 30, 2021 and 2020. Future unfunded contingent equity commitments related to the Company’s LIHTC investments at September 30, 2021 are as follows: (Dollars in thousands) Amount Years ending December 31, 2021 $ 7,237 2022 28,759 2023 26,446 2024 8,937 2025 300 Thereafter 1,178 Total $ 72,857 The Company has elected to use the proportional amortization method, and more specifically the practical expedient method, for the amortization of all eligible LIHTC investments and amortization expense is recognized as a component of income tax expense. The following table summarizes the amortization expense and the amount of tax credits and other tax benefits recognized for qualified affordable housing project investments during the periods presented. Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amortization expense $ 1,604 1,936 6,330 5,766 Tax credits and other tax benefits recognized 2,983 2,608 9,260 7,771

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2021
Transfers and Servicing [Abstract]
Securities Sold Under Agreements to Repurchase	Loan Servicing Mortgage loans that are serviced for others are not reported as assets, only the servicing rights are recorded and included in other assets. The following schedules disclose the change in the carrying value of mortgage servicing rights that is included in other assets, principal balances of loans serviced and the fair value of mortgage servicing rights: (Dollars in thousands) September 30, December 31, Carrying value at beginning of period $ 8,976 1,618 Additions 3,996 8,298 Amortization (1,327) (940) Carrying value at end of period $ 11,645 8,976 Principal balances of loans serviced for others $ 1,511,199 1,269,080 Fair value of servicing rights $ 15,477 12,087 The following table summarizes the carrying value of the Company’s securities sold under agreements to repurchase (“repurchase agreements”) by remaining contractual maturity of the agreements and category of collateral: Overnight and Continuous (Dollars in thousands) September 30, December 31, State and local governments $ 118,957 787,016 Corporate bonds 137,461 217,567 Residential mortgage-backed securities 773,204 — Commercial mortgage-backed securities 11,317 — Total $ 1,040,939 1,004,583

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities Cash Flow Hedges The Company is exposed to certain risk relating to its ongoing business operations. The primary risk managed by using derivative instruments is interest ra te risk. Interest rate caps have been entered into to manage interest rate risk associated with forecasted variable rate borrowings. Interest Rate Cap Deriv atives. In March 2020, the Company purchased interest rate caps designated as cash flow hedges with notional amounts totaling $130,500,000 on its variable rate subordinated debentures and were determined to be fully effective during the nine months ended September 30, 2021. The interest rate caps require receipt of variable amounts from the counterparty when interest rates rise above the strike price in the contracts. The strike prices in the five year term contracts range from 1.5 percent to 2 percent 3 month LIBOR. At September 30, 2021 and December 31, 2020, the interest rate caps had a fair value of $553,000 and $201,000, respectively, and were reported as other assets on the Company’s statements of financial condition. Changes in fair value were recorded in OCI. Amortization recorded on the interest rate caps totaled $126,000 and $84,000 for the nine months ended September 30, 2021 and September 30, 2020, respectively, and was reported as a component of interest expense on subordinated debentures. The effect of cash flow hedge accounting on OCI for the periods ending September 30, 2021 and 2020 was as follows: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amount of gain (loss) recognized in OCI $ 30 (76) 479 (532)

Other Expenses

Other Expenses	9 Months Ended
	Sep. 30, 2021
Other Expenses [Abstract]
Other Expenses	Other Expenses Other expenses consists of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Consulting and outside services $ 3,003 4,050 7,918 8,604 Loan expenses 1,649 1,743 5,028 3,732 VIE amortization and other expenses 1,668 1,510 4,342 3,396 Telephone 1,330 1,314 4,044 3,865 Debit card expenses 1,469 1,414 3,761 3,704 Business development 1,360 1,139 3,230 3,110 Postage 894 851 2,729 2,479 Printing and supplies 840 877 2,453 2,704 Employee expenses 953 560 2,137 2,247 Mergers and acquisition expenses 472 792 1,654 7,311 Legal fees 283 206 1,075 1,025 Checking and operating expenses 307 355 1,061 1,263 Accounting and audit fees 172 455 865 1,453 (Gain) loss on dispositions of fixed assets (65) — (1,463) 125 Other 985 1,203 3,092 3,076 Total other expenses $ 15,320 16,469 41,926 48,094

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table illustrates the activity within accumulated other comprehensive income (loss) by component, net of tax: (Dollars in thousands) Gains (Losses) on Available-For-Sale and Transferred Debt Securities (Losses) Gains on Derivatives Used for Cash Flow Hedges Total Balance at January 1, 2020 $ 40,226 — 40,226 Other comprehensive income (loss) before reclassifications 92,027 (397) 91,630 Reclassification adjustments for gains included in net income (loss) (758) — (758) Net current period other comprehensive income (loss) 91,269 (397) 90,872 Balance at September 30, 2020 $ 131,495 (397) 131,098 Balance at January 1, 2021 $ 143,443 (353) 143,090 Other comprehensive (loss) income before reclassifications (63,468) 359 (63,109) Reclassification adjustments for gains and transfers included in net income (650) — (650) Reclassification adjustments for amortization included in net income for transferred securities (1,672) — (1,672) Net current period other comprehensive (loss) income (65,790) 359 (65,431) Balance at September 30, 2021 $ 77,653 6 77,659

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period presented. Diluted earnings per share is computed by including the net increase in shares as if dilutive outstanding restricted stock units were vested and stock options were exercised, using the treasury stock method. Basic and diluted earnings per share has been computed based on the following: Three Months ended Nine Months ended (Dollars in thousands, except per share data) September 30, September 30, September 30, September 30, Net income available to common stockholders, basic and diluted $ 75,619 77,757 234,048 184,540 Average outstanding shares - basic 95,510,772 95,411,656 95,494,211 94,704,198 Add: dilutive restricted stock units and stock options 75,430 30,920 79,308 43,696 Average outstanding shares - diluted 95,586,202 95,442,576 95,573,519 94,747,894 Basic earnings per share $ 0.79 0.81 2.45 1.95 Diluted earnings per share $ 0.79 0.81 2.45 1.95 Restricted stock units and stock options excluded from the diluted average outstanding share calculation 1 — 93,253 — 78,605 ______________________________ 1 Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock unit or the exercise price of a stock option exceeds the market price of the Company’s stock.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There is a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value are as follows: Level 1 Quoted prices in active markets for identical assets or liabilities Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities Transfers in and out of Level 1 (quoted prices in active markets), Level 2 (significant other observable inputs) and Level 3 (significant unobservable inputs) are recognized on the actual transfer date. There were no transfers between fair value hierarchy levels during the nine month periods ended September 30, 2021 and 2020. Recurring Measurements The following is a description of the inputs and valuation methodologies used for assets and liabilities measured at fair value on a recurring basis, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. There have been no significant changes in the valuation techniques during the period ended September 30, 2021. Debt securities, available-for-sal e. The fair value for available-for-sale debt securities is estimated by obtaining quoted market prices for identical assets, where available. If such prices are not available, fair value is based on independent asset pricing services and models, the inputs of which are market-based or independently sourced market parameters, including but not limited to, yield curves, interest rates, volatilities, market spreads, prepayments, defaults, recoveries, cumulative loss projections, and cash flows. Such securities are classified in Level 2 of the valuation hierarchy. Where Level 1 or Level 2 inputs are not available, such securities are classified as Level 3 within the hierarchy. Fair value determinations of available-for-sale debt securities are the responsibility of the Company’s corporate accounting and treasury departments. The Company obtains fair value estimates from independent third party vendors on a monthly basis. The vendors’ pricing system methodologies, procedures and system controls are reviewed to ensure they are appropriately designed and operating effectively. The Company reviews the vendors’ inputs for fair value estimates and the recommended assignments of levels within the fair value hierarchy. The review includes the extent to which markets for debt securities are determined to have limited or no activity, or are judged to be active markets. The Company reviews the extent to which observable and unobservable inputs are used as well as the appropriateness of the underlying assumptions about risk that a market participant would use in active markets, with adjustments for limited or inactive markets. In considering the inputs to the fair value estimates, the Company places less reliance on quotes that are judged to not reflect orderly transactions, or are non-binding indications. In assessing credit risk, the Company reviews payment performance, collateral adequacy, third party research and analyses, credit rating histories and issuers’ financial statements. For those markets determined to be inactive or limited, the valuation techniques used are models for which management has verified that discount rates are appropriately adjusted to reflect illiquidity and credit risk. Loans held for sale, at fair value. Loans held for sale measured at fair value, for which an active secondary market and readily available market prices exist, are initially valued at the transaction price and are subsequently valued by using quoted prices for similar assets, adjusted for specific attributes of that loan or other observable market data, such as outstanding commitments from third party investors. Loans held for sale measured at fair value are classified within Level 2. Included in gain on sale of loans were net losses of $4,565,000 and net gains of $3,435,000 for the nine month periods ended September 30, 2021 and 2020, respectively, from the changes in fair value of loans held for sale measured at fair value. Electing to measure loans held for sale at fair value reduces certain timing differences and better matches changes in fair value of these assets with changes in the value of the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. Loan interest rate lock commitments. F air value estimates for loan interest rate lock commitments were based upon the estimated sales price, origination fees, direct costs, interest rate changes, etc. and were obtained from an independent third party. The components of the valuation were observable or could be corroborated by observable market data and, therefore, were classified within Level 2 of the valuation hierarchy. Forward commitments to sell TBA securities. Fo rward commitments to sell TBA securities are used to economically hedge the interest rate risk associated with certain loan commitments. The fair value estimates for the TBA commitments were based upon the estimated sale of the TBA hedge obtained from an independent third party. The components of the valuation were observable or could be corroborated by observable market data and, therefore, were classified within Level 2 of the valuation hierarchy. Interest rate cap derivative financial instrum ents. F air value estimates for interest rate cap derivative financial instruments were based upon the discounted cash flows of known payments plus the option value of each caplet which incorporates market rate forecasts and implied market volatilities. The components of the valuation were observable or could be corroborated by observable market data and, therefore, were classified within Level 2 of the valuation hierarchy. The Company also obtained and compared the reasonableness of the pricing from independent third party valuations. The following tables disclose the fair value measurement of assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements (Dollars in thousands) Fair Value September 30, 2021 Quoted Prices Significant Significant Debt securities, available-for-sale U.S. government and federal agency $ 31,373 — 31,373 — U.S. government sponsored enterprises 47,051 — 47,051 — State and local governments 508,691 — 508,691 — Corporate bonds 198,119 — 198,119 — Residential mortgage-backed securities 5,491,345 — 5,491,345 — Commercial mortgage-backed securities 1,114,001 — 1,114,001 — Loans held for sale, at fair value 94,138 — 94,138 — Interest rate caps 553 — 553 — Interest rate locks 3,884 — 3,884 — TBA hedge 759 — 759 — Total assets measured at fair value on a recurring basis $ 7,489,914 — 7,489,914 — Fair Value Measurements (Dollars in thousands) Fair Value December 31, 2020 Quoted Prices Significant Significant Debt securities, available-for-sale U.S. government and federal agency $ 38,588 — 38,588 — U.S. government sponsored enterprises 9,781 — 9,781 — State and local governments 1,416,683 — 1,416,683 — Corporate bonds 349,098 — 349,098 — Residential mortgage-backed securities 2,289,090 — 2,289,090 — Commercial mortgage-backed securities 1,234,574 — 1,234,574 — Loans held for sale, at fair value 166,572 — 166,572 — Interest rate caps 201 — 201 — Interest rate locks 8,605 — 8,605 — Total assets measured at fair value on a recurring basis $ 5,513,192 — 5,513,192 — TBA hedge $ 2,056 — 2,056 — Total liabilities measured at fair value on a recurring basis $ 2,056 — 2,056 — Non-recurring Measurements The following is a description of the inputs and valuation methodologies used for assets recorded at fair value on a non-recurring basis, as well as the general classification of such assets pursuant to the valuation hierarchy. There have been no significant changes in the valuation techniques during the period ended September 30, 2021. Other real estate owned. OREO is initially recorded at fair value less estimated cost to sell, establishing a new cost basis. OREO is subsequently accounted for at lower of cost or fair value less estimated cost to sell. Estimated fair value of OREO is based on appraisals or evaluations (new or updated). OREO is classified within Level 3 of the fair value hierarchy. Collateral-dependent loans, net of ACL. Fair value estimates of collateral-dependent loans that are individually reviewed are based on the fair value of the collateral, less estimated cost to sell. Collateral-dependent individually reviewed loans are classified within Level 3 of the fair value hierarchy. The Company’s credit department reviews appraisals for OREO and collateral-dependent loans, giving consideration to the highest and best use of the collateral. The appraisal or evaluation (new or updated) is considered the starting point for determining fair value. The valuation techniques used in preparing appraisals or evaluations (new or updated) include the cost approach, income approach, sales comparison approach, or a combination of the preceding valuation techniques. The key inputs used to determine the fair value of the collateral-dependent loans and OREO include selling costs, discounted cash flow rate or capitalization rate, and adjustment to comparables. Valuations and significant inputs obtained by independent sources are reviewed by the Company for accuracy and reasonableness. The Company also considers other factors and events in the environment that may affect the fair value. The appraisals or evaluations (new or updated) are reviewed at least quarterly and more frequently based on current market conditions, including deterioration in a borrower’s financial condition and when property values may be subject to significant volatility. After review and acceptance of the collateral appraisal or evaluation (new or updated), adjustments to the impaired loan or OREO may occur. The Company generally obtains appraisals or evaluations (new or updated) annually. The following tables disclose the fair value measurement of assets with a recorded change during the period resulting from re-measuring the assets at fair value on a non-recurring basis: Fair Value Measurements (Dollars in thousands) Fair Value September 30, 2021 Quoted Prices Significant Significant Collateral-dependent impaired loans, net of ACL 28,651 — — 28,651 Fair Value Measurements (Dollars in thousands) Fair Value December 31, 2020 Quoted Prices Significant Significant Other real estate owned $ 564 — — 564 Collateral-dependent impaired loans, net of ACL 26,749 — — 26,749 Total assets measured at fair value on a non-recurring basis $ 27,313 — — 27,313 Non-recurring Measurements Using Significant Unobservable Inputs (Level 3) The following tables present additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Fair Value September 30, 2021 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Collateral-dependent impaired loans, net of ACL $ 21,090 Cost approach Selling costs 10.0% - 10.0% (10.0%) 7,561 Sales comparison approach Selling costs 5.0% - 10.0% (5.1%) Adjustment to comparables 5.0% - 10.0% (5.5%) $ 28,651 Fair Value December 31, 2020 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 564 Sales comparison approach Selling costs 8.0% - 10.0% (9.0%) Collateral-dependent loans, net of ACL $ 144 Cost approach Selling costs 10.0% - 10.0% (10.0%) 25,309 Sales comparison approach Selling Costs 10.0% - 10.0% (0.1%) Adjustment to comparables 0.0% - 100.0% (11.1%) 1,296 Combined approach Selling costs 10.0% - 10.0% (10.0%) Discount rate 8.0% - 8.0% (8.0%) $ 26,749 ______________________________ 1 The range for selling cost inputs represents reductions to the fair value of the assets. Fair Value of Financial Instruments The following tables present the carrying amounts, estimated fair values and the level within the fair value hierarchy of the Company’s financial instruments not carried at fair value. Receivables and payables due in one year or less, equity securities without readily determinable fair values and deposits with no defined or contractual maturities are excluded. There have been no significant changes in the valuation techniques during the period ended September 30, 2021. Cash and cash equivalents : fair value is estimated at book value. Debt securities, held-to-maturity : fair value for held-to-maturity debt securities is estimated in the same manner as available-for sale debt securities, which is described above. Loans receivable, net of ACL : The loans were fair valued on an individual basis, with consideration given to the loans' underlying characteristics, including account types, remaining terms and balance, interest rates, past delinquencies, current market rates, etc. The model utilizes a discounted cash flow approach to estimate the fair value of the loans using various assumptions such as prepayment speeds, projected default probabilities, losses given defaults, etc. The discounted cash flow approach models the credit losses directly in the projected cash flows. The model applies various assumptions regarding credit, interest, and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Term Deposits : fair value of term deposits is estimated by discounting the future cash flows using rates of similar deposits with similar maturities. The market rates used were obtained from an independent third party based on current rates offered by the Company’s regional competitors. Repurchase agreements and other borrowed funds : fair value of term repurchase agreements and other term borrowings is estimated based on current repurchase rates and borrowing rates currently available to the Company for repurchases and borrowings with similar terms and maturities. The estimated fair value for overnight repurchase agreements and other borrowings is book value. Subordinated debentures : fair value of the subordinated debt is estimated by discounting the estimated future cash flows using current estimated market rates obtained from an independent third party. Off-balance sheet financial instrument s: unused lines of credit and letters of credit represent the principal categories of off-balance sheet financial instruments. The fair value of commitments is based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The fair value of unused lines of credit and letters of credit is not material; therefore, such commitments are not included in the following tables. Fair Value Measurements (Dollars in thousands) Carrying Amount September 30, 2021 Quoted Prices Significant Significant Financial assets Cash and cash equivalents $ 348,888 348,888 — — Debt securities, held-to-maturity 1,128,299 — 1,146,453 — Loans receivable, net of ACL 11,140,282 — — 11,352,711 Total financial assets $ 12,617,469 348,888 1,146,453 11,352,711 Financial liabilities Term deposits $ 919,852 — 922,810 — Repurchase agreements and other borrowed funds 1,074,610 — 1,074,610 — Subordinated debentures 132,580 — 130,081 — Total financial liabilities $ 2,127,042 — 2,127,501 — Fair Value Measurements (Dollars in thousands) Carrying Amount December 31, 2020 Quoted Prices Significant Significant Financial assets Cash and cash equivalents $ 633,142 633,142 — — Debt securities, held-to-maturity 189,836 — 203,216 — Loans receivable, net of ACL 10,964,453 — — 11,233,002 Total financial assets $ 11,787,431 633,142 203,216 11,233,002 Financial liabilities Term deposits $ 978,779 — 983,491 — Repurchase agreements and other borrowed funds 1,037,651 — 1,037,651 — Subordinated debentures 139,959 — 123,944 — Total financial liabilities $ 2,156,389 — 2,145,086 —

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn October 1, 2021, the Company acquired 100% percent of the outstanding common stock of Altabancorp and its wholly-owned subsidiary, Altabank, a community bank based in American Fork, Utah (collectively, “Alta”). Alta provides banking services to individuals and businesses in Utah with twenty-five banking offices from Preston, Idaho to St. George, Utah. The acquisition expanded the Company’s presence in Utah. As of September 30, 2021, Altabancorp had total assets of $3,647,728,000, gross loans of $1,901,181,000, and total deposits of $3,278,907,000. The preliminary value of the Alta acquisition is $839,852,000 and resulted in the Company issuing 15,173,480 shares of its common stock. The fair value of the Company shares issued was determined on the basis of the opening market price of the Company’s common stock on the October 1, 2021 acquisition date. The excess of the fair value of consideration transferred over total identifiable net assets will be recorded as goodwill. The initial accounting for the acquisition has not been completed because the information to measure the fair value of financial assets, financial liabilities and goodwill is not yet available. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable, but no later than one year from the acquisition date.

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Glacier Bancorp, Inc. (“Company”) is a Montana corporation headquartered in Kalispell, Montana. The Company provides a full range of banking services to individuals and businesses in Montana, Idaho, Utah, Washington, Wyoming, Colorado, Arizona and Nevada through its wholly-owned bank subsidiary, Glacier Bank (“Bank”). The Company offers a wide range of banking products and services, including: 1) retail banking; 2) business banking; 3) real estate, commercial, agriculture and consumer loans; and 4) mortgage origination services. The Company serves individuals, small to medium-sized businesses, community organizations and public entities. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. These interim financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete financial statements and they should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. Operating results for the nine months ended September 30, 2021 are not necessarily indicative of the results anticipated for the year ending December 31, 2021. The condensed consolidated statement of financial condition of the Company as of December 31, 2020 has been derived from the audited consolidated statements of the Company as of that date. The Company is a defendant in legal proceedings arising in the normal course of business. In the opinion of management, the disposition of pending litigation will not have a material affect on the Company’s consolidated financial position, results of operations or liquidity.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements of the Company include the parent holding company and the Bank, which consists of sixteen bank divisions and a corporate division. The corporate division includes the Bank’s investment portfolio, wholesale borrowings and other centralized functions. The Bank divisions operate under separate names, management teams and advisory directors. The Company considers the Bank to be its sole operating segment as the Bank 1) engages in similar bank business activity from which it earns revenues and incurs expenses; 2) the operating results of the Bank are regularly reviewed by the Chief Executive Officer (“CEO”) (i.e., the chief operating decision maker) who makes decisions about resources to be allocated to the Bank; and 3) financial information is available for the Bank. All significant inter-company transactions have been eliminated in consolidation. The Bank has subsidiary interests in variable interest entities (“VIE”) for which the Bank has both the power to direct the VIE’s significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. These subsidiary interests are included in the Company’s consolidated financial statements. The Bank also has subsidiary interests in VIEs for which the Bank does not have a controlling financial interest and is not the primary beneficiary. These subsidiary interests are not included in the Company’s consolidated financial statements. The parent holding company owns non-bank subsidiaries that have issued trust preferred securities. The trust subsidiaries are not included in the Company’s consolidated financial statements. The Company's investments in the trust subsidiaries are included in other assets on the Company's statements of financial condition.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash and cash equivalents include cash on hand, cash held as demand deposits at various banks and the Federal Reserve Bank (“FRB”), interest bearing deposits, federal funds sold, and liquid investments with original maturities of three months or less. The Bank is required to maintain an average reserve balance with either the FRB or in the form of cash on hand.
Debt Securities	De bt Securities On January 1, 2020, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses , which significantly changed the allowance for credit loss accounting policies for debt securities. The following debt securities and allowance for credit loss accounting policies are presented under Accounting Standards Codification™ (“ASC”) Topic 326. Debt securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity and are carried at amortized cost. Debt securities held primarily for the purpose of selling in the near term are classified as trading securities and are reported at fair value, with unrealized gains and losses included in income. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale and are reported at fair value with unrealized gains and losses, net of income taxes, as a separate component of other comprehensive income (“OCI”). Premiums and discounts on debt securities are amortized or accreted into income using a method that approximates the interest method. The objective of the interest method is to calculate periodic interest income at a constant effective yield. The Company does not have any debt securities classified as trading securities. When the Company acquires another entity, it records the debt securities at fair value. The Company reviews and analyzes the various risks that may be present within the investment portfolio on an ongoing basis, including market risk, credit risk and liquidity risk. Market risk is the risk to an entity’s financial condition resulting from adverse changes in the value of its holdings arising from movements in interest rates, foreign exchange rates, equity prices or commodity prices. The Company assesses the market risk of individual debt securities as well as the investment portfolio as a whole. Credit risk, broadly defined, is the risk that an issuer or counterparty will fail to perform on an obligation. The credit rating of a security is considered the primary credit quality indicator for debt securities. Liquidity risk refers to the risk that a security will not have an active and efficient market in which the security can be sold. A debt security is investment grade if the issuer has adequate capacity to meet its commitment over the expected life of the investment, i.e., the risk of default is low and full and timely repayment of interest and principal is expected. To determine investment grade status for debt securities, the Company conducts due diligence of the creditworthiness of the issuer or counterparty prior to acquisition and ongoing thereafter consistent with the risk characteristics of the security and the overall risk of the investment portfolio. Credit quality due diligence takes into account the extent to which a security is guaranteed by the U.S. government and other agencies of the U.S. government. The depth of the due diligence is based on the complexity of the structure, the size of the security, and takes into account material positions and specific groups of securities or stratifications for analysis and review of similar risk positions. The due diligence includes consideration of payment performance, collateral adequacy, internal analyses, third party research and analytics, external credit ratings and default statistics. The Company has acquired debt securities through acquisitions and if the securities have more than insignificant credit deterioration since origination, they are designated as purchased credit-deteriorated (“PCD”) securities. An ACL is determined using the same methodology as with other debt securities. The sum of a PCD security’s fair value and associated ACL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the debt security is a noncredit discount or premium, which is amortized into interest income over the life of the security. Subsequent changes to the ACL are recorded through provision for credit losses. For additional information relating to debt securities, see Note 2. Allowance for Credit Losses - Available-for-Sale Debt Securities For available-for-sale 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 of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through other expense. For the available-for-sale securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from cred it losses or other factors. In such assessment, the Company considers the extent to which fair value is less than amortized cost, if there are any changes to the investment grade of the security by a rating agency, and if there are any adverse conditions that impact the security. If this assessment indicates a credit loss exists, the present value of the cash flows expected to be collected from the security is compared to the amortized cost basis of the s ecurity. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a potential credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any estimated credit losses that have not been recorded through an ACL are recognized in OCI. The Company has elected to exclude accrued interest from the estimate of credit losses for available-for-sale debt securities. As part of its non-accrual policy, the Company charges-off uncollectable interest at the time it is determined to be uncollectable. Allowance for Credit Losses - Held-to-Maturity Debt Securities For estimating the allowance for held-to-maturity (“HTM”) debt securities that share similar risk characteristics with other securities, such securities are pooled based on major security type. For pools of such securities with similar risk characteristics, the historical lifetime probability of default and severity of loss in the event of default is derived or obtained from external sources and adjusted for the expected effects of reasonable and supportable forecasts over the expected lives of the securities on those historical credit losses. Expected credit losses on securities in the held-to-maturity portfolio that do not share similar risk characteristics with any of the pools of debt securities are individually measured based on net realizable value, or the difference between the discounted value of the expected future cash flows, based on the original effective interest rate, and the recorded amortized cost basis of the securities.
Loans Held for Sale	Loans Held for Sale Loans held for sale generally consist of long-term, fixed rate, conforming, single-family residential real estate loans intended to be sold on the secondary market. Loans held for sale are recorded at fair value and may or may not be sold with servicing rights released. Changes in fair value are recognized in non-interest income. Fair value elections are made at the time of origination based on the Company’s fair value election policy.
Loans Receivable	Loans Receivable On January 1, 2020, the Company adopted FASB ASU 2016-13, Financial Instruments - Credit Losses , which significantly changed the loan and allowance for credit loss accounting policies. The following loan and allowance for credit loss accounting policies are presented under ASC Topic 326. The Company’s loan segments or classes are based on the purpose of the loan and consist of residential real estate, commercial real estate, other commercial, home equity, and other consumer loans. Loans that are intended to be held-to-maturity are reported at the unpaid principal balance less net c harge-offs and adjusted for deferred fees and costs on originated loans and unamortized premiums or discounts on acquired loans. Interest income is accrued on the unpaid principal balance. Fees and costs on originated loans and premiums or discounts on acquired loans are deferred and subsequently amortized or accreted as a yield adjustment over the expected life of the loan utilizing the interest or straight-line methods. The interest method is utilized for loans with scheduled payment terms and the objective is to calculate periodic interest income at a constant effective yield. The straight-line method is utilized for revolving lines of credit or loans with no scheduled payment terms. When a loan is paid off prior to maturity, the remaining unamortized fees and costs on originated loans and unamortized premiums or discounts on acquired loans are immediately recognized into interest income. Loans that are thirty days or more past due based on payments received and applied to the loan are considered delinquent. Loans are designated non-accrual and the accrual of interest is discontinued when the collection of the contractual principal or interest is unlikely. A loan is typically placed on non-accrual when principal or interest is due and has remained unpaid for ninety days or more. When a loan is placed on non-accrual status, interest previously accrued but not collected is reversed against current period interest income. Subsequent payments on non-accrual loans are applied to the outstanding principal balance if doubt remains as to the ultimate collectability of the loan. Interest accruals are not resumed on partially charged-off impaired loans. For other loans on non-accrual, interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of management, the loans are estimated to be fully collectible as to both principal and interest. The Company has acquired loans through acquisitions, some of which have experienced more than insignificant credit deterioration since origination. The Company considers all acquired non-accrual loans to be PCD loans. In addition, the Company considers loans accruing ninety days or more past due or substandard loans to be PCD loans. An ACL is determined using the same methodology as other loans held for investment. The ACL determined on a collective basis is allocated to individual loans. The sum of a loan’s fair value and ACL becomes the initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the ACL are recorded through provision for credit losses.
Allowance for Credit Losses - Loans Receivable	Allowance for Credit Losses - Loans Receivable The allowance for credit losses for loans receivable represents management’s estimate of credit losses over the expected contractual life of the loan portfolio. The estimate is determined based on the amortized cost of the loan portfolio including the loan balance adjusted for charge-offs, recoveries, deferred fees and costs, and loan discount and premiums. Recoveries are included only to the extent that such amounts were previously charged-off. The Company has elected to exclude accrued interest from the estimate of credit losses for loans. Determining the adequacy of the allowance is complex and requires a high degree of judgment by management about the effect of matters that are inherently uncertain. Subsequent evaluations of the then-existing loan portfolio, in light of the factors then prevailing, may result in significant changes in the allowance in those future periods. The allowance is increased for estimated credit losses which are recorded as expense. The portion of loans and overdraft balances determined by management to be uncollectable are charged-off as a reduction to the allowance and recoveries of amounts previously charged-off increase the allowance. The Company’s charge-off policy is consistent with bank regulatory standards. Consumer loans generally are charged-off when the loan becomes over 120 days delinquent. Real estate acquired as a result of foreclosure or by deed-in-lieu of foreclosure is classified as other real estate owned (“OREO”) until such time as it is sold. The expected credit loss estimate process involves procedures to consider the unique characteristics of each of the Company’s loan portfolio segments, which consist of residential real estate, commercial real estate, other commercial, home equity, and other consumer loans. When computing the allowance levels, credit loss assumptions are estimated using a model that categorizes loan pools based on loss history, credit and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. The Company has determined a four consecutive quarter forecasting period is a reasonable and supportable period. Expected credit loss for periods beyond reasonable and supportable forecast periods are determined based on a reversion method which reverts back to historical loss estimate over a four consecutive quarter period on a straight-line basis. Credit quality is assessed and monitored by evaluating various attributes and the results of those evaluations are utilized in underwriting new loans and the process for estimating the expected credit losses. The following paragraphs describe the risk characteristics relevant to each portfolio segment. Residential Real Estate. Residential real estate loans are secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan segment include a large number of borrowers, geographic dispersion of market areas and the loans are originated for relatively smaller amounts. Commercial Real Estate . Commercial real estate loans typically involve larger principal amounts, and repayment of these loans is generally dependent on the successful operation of the property securing the loan and/or the business conducted on the property securing the loan. Credit risk in these loans is impacted by the creditworthiness of a borrower, valuation of the property securing the loan and conditions within the local economies in the Company’s diverse, geographic market areas. Commercial . Commercial loans consist of loans to commercial customers for use in financing working capital needs, equipment purchases and business expansions. The loans in this category are repaid primarily from the cash flow of a borrower’s principal business operation. Credit risk in these loans is driven by creditworthiness of a borrower and the economic conditions that impact the cash flow stability from business operations across the Company’s diverse, geographic market areas. Home Equity . Home equity loans consist of junior lien mortgages and first and junior lien lines of credit (revolving open-end and amortizing closed-end) secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan segment are a large number of borrowers, geographic dispersion of market areas and the loans are originated for terms that range from 10 to 15 years. Other Consumer . The other consumer loan portfolio consists of various short-term loans such as automobile loans and loans for other personal purposes. Repayment of these loans is primarily dependent on the personal income of the borrowers. Credit risk is driven by consumer economic factors (such as unemployment and general economic conditions in the Company’s diverse, geographic market area) and the creditworthiness of a borrower. The allowance is impacted by loan volumes, delinquency status, credit ratings, historical loss experiences, estimated prepayment speeds, weighted average lives and other conditions influencing loss expectations, such as reasonable and supportable forecasts of economic conditions. The methodology for estimating the amount of expected credit losses reported in the allowance has two basic components: 1) individual loans that do not share similar risk characteristics with other loans and the measurement of expected credit losses for such individual loans; and 2) the expected credit losses for pools of loans that share similar risk characteristics. Loans that do not Share Similar Risk Characteristics with Other Loans. For a loan that does not share similar risk characteristics with other loans, expected credit loss is measured based on the net realizable value, that is, the difference between the discounted value of the expected future cash flows, based on the original effective interest rate, and the amortized cost basis of the loan. For these loans, the expected credit loss is equal to the amount by which the net realizable value of the loan is less than the amortized cost basis of the loan (which is net of previous charge-offs and deferred loan fees and costs), except when the loan is collateral-dependent, that is, when foreclosure is probable or the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. In these cases, expected credit loss is measured as the difference between the amortized cost basis of the loan and the fair value of the collateral. The fair value of the collateral is adjusted for the estimated cost to sell if repayment or satisfaction of a loan is dependent on the sale (rather than only on the operation) of the collateral. The Company has determined that non-accrual loans do not share similar risk characteristics with other loans and these loans are individually evaluated for estimated allowance for credit losses. The Company, through its credit monitoring process, may also identify other loans that do not share similar risk characteristics and individually evaluate such loans. The starting point for determining the fair value of collateral is to obtain external appraisals or evaluations (new or updated). The valuation techniques used in preparing appraisals or evaluations (new or updated) include the cost approach, income approach, sales comparison approach, or a combination of the preceding valuation techniques. The Company’s credit department reviews appraisals, giving consideration to the highest and best use of the collateral. The appraisals or evaluations (new or updated) are reviewed at least quarterly and more frequently based on current market conditions, including deterioration in a borrower’s financial condition and when property values may be subject to significant volatility. Adjustments may be made to the fair value of the collateral after review and acceptance of the collateral appraisal or evaluation (new or updated). Loans that Share Similar Risk Characteristics with other Loans. For estimating the allowance for loans that share similar risk characteristics with other loans, such loans are segregated into loan segments. Loans are designated into loan segments based on loans pooled by product types and similar risk characteristics or areas of risk concentration. In determining the ACL, the Company derives an estimated credit loss assumption from a model that categorizes loan pools based on loan type which is further segregated by the credit quality indicators. This model calculates an expected loss percentage for each loan segment by considering the non-discounted simple annual average historical loss rate of each loan segment (calculated through an “open pool” method), multiplying the loss rate by the amortized loan balance and incorporating that segment’s internally generated prepayment speed assumption and contractually scheduled remaining principal pay downs on a loan level basis. The annual historical loss rates are adjusted over a reasonable economic forecast period by a multiplier that is calculated based upon current national economic forecasts as a proportion of each segment’s historical average loss levels. The Company will then revert from the economic forecast period back to the historical average loss rate in a straight-line basis. After the reversion period, the loans will be assumed to experience their historical loss rate for the remainder of their contractual lives. The model applies the expected loss rate over the projected cash flows at the individual loan level and then aggregates the losses by loan segment in determining their quantitative allowance. The Company will also include qualitative adjustments to adjust the ACL on loan segments to the extent the current or future market conditions are believed to vary substantially from historical conditions in regards to: • lending policies and procedures; • i nternational, national, regional and local economic business conditions and developments that affect the collectability of the portfolio, including the condition of various markets; • the nature and volume of the loan portfolio including the terms of the loans; • the experience, ability, and depth of the lending management and other relevant staff; • the volume and severity of past due and adversely classified or graded loans and the volume of non-accrual loans; • the quality of our loan review system; • the value of underlying collateral for collateralized loans; • the existence and effect of any concentrations of credit, and changes in the level of concentrations; and • the effect of external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the existing portfolio. The Company regularly reviews loans in the portfolio to assess credit quality indicators and to determine the appropriate loan classification and grading in accordance with applicable bank regulations. The primary credit quality indicator for residential, home equity and other consumer loans is the days past due status, which consists of the following categories: 1) performing loans; 2) 30 to 89 days past due loans; and 3) non-accrual and ninety days or more past due loans. The primary credit quality indicator for commercial real estate and commercial loans is the Company’s internal risk rating system, which includes the following categories: 1) pass loans; 2) special mention loans; 3) substandard loans; and 4) doubtful or loss loans. Such credit quality indicators are regularly monitored and incorporated into the Company’s allowance estimate. The following paragraphs further define the internal risk ratings for commercial real estate and commercial loans. Pass Loans. These ratings represent loans that are of acceptable, good or excellent quality with very limited to no risk. Loans that do not have one of the following ratings are considered pass loans. Special Mention Loans. These ratings represent loans that are designated as special mention per the regulatory definition. Special mention loans are currently protected but are potentially weak. The credit risk may be relatively minor yet constitute an undue and unwarranted risk in light of the circumstances surrounding a specific loan. The rating may be used to identify credit with potential weaknesses that if not corrected may weaken the loan to the point of inadequately protecting the Bank’s credit position. Examples include a lack of supervision, inadequate loan agreement, condition, or control of collateral, incomplete, or improper documentation, deviations from lending policy, and adverse trends in operations or economic conditions. Substandard Loans. This rating represents loans that are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged. A loan so classified must have a well-defined weakness that jeopardizes the liquidation of the debt. These loans are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. Loss potential, while existing in the aggregated amount of substandard loans, does not have to exist in an individual loan classified substandard. Doubtful/Loss Loans. A loan classified as doubtful has the characteristics that make collection in full, on the basis of currently existing facts, conditions, and values, highly improbable. The possibility of loss is extremely high, but because of pending factors, which may work to the advantage and strengthening of the loan, its classification as loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral and refinancing plans. Loans are classified as loss when they are deemed to be not collectible and of such little value that continuance as an active asset of the Bank is not warranted. Loans classified as loss must be charged-off. Assignment of this classification does not mean that an asset has absolutely no recovery or salvage value, but that it is not practical or desirable to defer writing off a basically worthless asset, even though partial recovery may be attained in the future. Restructured Loans A restructured loan is considered a troubled debt restructuring (“TDR”) if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. The Company periodically enters into restructure agreements with borrowers whereby the loans were previously identified as TDRs. When such circumstances occur, the Company carefully evaluates the facts of the subsequent restructure to determine the appropriate accounting and under certain circumstances it may be acceptable not to account for the subsequently restructured loan as a TDR. When assessing whether a concession has been granted by the Company, any prior forgiveness on a cumulative basis is considered a continuing concession. The Company has made the following types of loan modifications, some of which were considered a TDR: • reduction of the stated interest rate for the remaining term of the debt; • extension of the maturity date(s) at a stated rate of interest lower than the current market rate for newly originated debt having similar risk characteristics; and • reduction of the face amount of the debt as stated in the debt agreements. The Company recognizes that while borrowers may experience deterioration in their financial condition, many continue to be creditworthy borrowers who have the willingness and capacity for debt repayment. In determining whether non-restructured or performing loans issued to a single or related party group of borrowers should continue to accrue interest when the borrower has other loans that are non-performing or are TDRs, the Company on a quarterly or more frequent basis performs an updated and comprehensive assessment of the willingness and capacity of the borrowers to timely and ultimately repay their total debt obligations, including contingent obligations. Such analysis takes into account current financial information about the borrowers and financially responsible guarantors, if any, including for example: • analysis of global, i.e., aggregate debt service for total debt obligations; • assessment of the value and security protection of collateral pledged using current market conditions and alternative market assumptions across a variety of potential future situations; and • loan structures and related covenants. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was signed into law which includes many provisions that impact the Company and its customers. The banking regulatory agencies have encouraged banks to work with borrowers who have been impacted by the coronavirus disease of 2019 (“COVID-19”) and the CARES Act, along with related regulatory guidance, allows banks to not designate certain modifications as TDRs that otherwise may have been classified as TDRs. In general, in order to qualify for such treatment, the modifications need to be short-term and made on a good faith basis in response to the COVID-19 pandemic to borrowers who were previously deemed current as outlined in the regulatory guidance. The Company has made such modifications to assist borrowers impacted by the COVID-19 pandemic. The allowance for credit losses on a TDR is measured using the same method as all other loans held for investment. For a TDR that is individually reviewed and not collateral-dependent, the value of the concession can only be measured using the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the ACL is determined by discounting the expected future cash flows at the original interest of the loan. Allowance for Credit Losses - Off-Balance Sheet Credit Exposures The Company maintains a separate allowance for off-balance sheet credit exposures, including unfunded loan commitments, which is included in other liabilities on the Company’s statements of financial condition. The Company estimates the amount of expected losses by calculating a commitment usage factor over the contractual period for exposures and applying the loss factors used in the allowance for credit loss methodology to the results of the usage calculation to estimate the liability for credit losses related to unfunded commitments for each loan segment. No credit loss estimate is reported for off-balance sheet credit exposures that are unconditionally cancellable by the Bank or for unfunded amounts under such arrangements that may be drawn prior to the cancellation of the arrangement. Provision for Credit Losses
Premises and Equipment	Premises and EquipmentPremises and equipment are accounted for at cost less depreciation. Depreciation is computed on a straight-line method over the estimated useful lives or the term of the related lease. The estimated useful life for office buildings is 15 to 40 years and the estimated useful life for furniture, fixtures, and equipment is 3 to 10 years. Interest is capitalized for any significant building projects.
Lessee Leases	Leases The Company leases certain land, premises and equipment from third parties. A lessee lease is classified as an operating lease unless it meets certain criteria (e.g., lease contains option to purchase that Company is reasonably certain to exercise), in which case it is classified as a finance lease. Operating leases are included in net premises and equipment and other liabilities on the Company’s statements of financial condition and lease expense for lease payments is recognized on a straight-line basis over the lease term. Finance leases are included in net premises and equipment and other borrowed funds on the Company’s statements of financial condition. Right-of-use (“ROU”) assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. An ROU asset represents the right to use the underlying asset for the lease term and also includes any direct costs and payments made prior to lease commencement and excludes lease incentives. When an implicit rate is not available, an incremental borrowing rate based on the information available at commencement date is used in determining the present value of the lease payments. A lease term may include an option to extend or terminate the lease when it is reasonably certain the option will be exercised. The Company accounts for lease and nonlease components (e.g., common-area maintenance) together as a single combined lease component for all asset classes. Short-term leases of 12 months or less are excluded from accounting guidance; as a result, the lease payments are recognized on a straight-line basis over the lease term and the leases are not reflected on the Company’s statements of financial condition. Renewal and termination options are considered when determining short-term leases. Leases are accounted for on an individual lease level.
Lessor Leases	The Company also leases certain premises and equipment to third parties. A lessor lease is classified as an operating lease unless it meets certain criteria that would classify it as either a sales-type lease or a direct financing lease.
Other Real Estate Owned	Other Real Estate Owned Property acquired by foreclosure or deed-in-lieu of foreclosure is initially recorded at fair value, less estimated selling cost, at acquisition date (i.e., cost of the property). The Company is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan upon the occurrence of either the Company obtaining legal title to the property or the borrower conveying all interest in the property through a deed-in-lieu or similar agreement. Fair value is determined as the amount that could be reasonably expected in a current sale between a willing buyer and a willing seller in an orderly transaction between market participants at the measurement date. Subsequent to the initial acquisition, if the fair value of the asset, less estimated selling cost, is less than the cost of the property, a loss is recognized in other expense and the asset carrying value is reduced. Gain or loss on disposition of OREO is recorded in non-interest income or non-interest expense, respectively. In determining the fair value of the properties on the date of transfer and any subsequent estimated losses of net realizable value, the fair value of other real estate acquired by foreclosure or deed-in-lieu of foreclosure is determined primarily based upon appraisal or evaluation of the underlying property value.
Business Combination and Intangible Assets	Business Combinations and Intangible Assets Acquisition accounting requires the total purchase price to be allocated to the estimated fair values of assets acquired and liabilities assumed, including certain intangible assets. Goodwill is recorded if the purchase price exceeds the net fair value of assets acquired and a bargain purchase gain is recorded in other income if the net fair value of assets acquired exceeds the purchase price. Adjustment of the allocated purchase price may be related to fair value estimates for which all information has not been obtained of the acquired entity known or discovered during the allocation period, the period of time required to identify and measure the fair values of the assets and liabilities acquired in the business combination. The allocation period is generally limited to one year following consummation of a business combination. Core deposit intangible represents the intangible value of depositor relationships resulting from deposit liabilities assumed in acquisitions and is amortized using an accelerated method based on an estimated runoff of the related deposits. The core deposit intangible is evaluated for impairment and recoverability whenever events or changes in circumstances indicate that its carrying amount may not be recoverable, with any changes in estimated useful life accounted for prospectively over the revised remaining life. The Company tests goodwill for impairment at the reporting unit level annually during the third quarter. The Company has identified that each of the Bank divisions are reporting units (i.e., components of the Glacier Bank operating segment) given that each division has a separate management team that regularly reviews its respective division financial information; however, the reporting units are aggregated into a single reporting unit due to the reporting units having similar economic characteristics. The goodwill of a reporting unit is tested for impairment between annual tests if an event occurs or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. Examples of events and circumstances that could trigger the need for interim impairment testing include: • a significant change in legal factors or in the business climate; • an adverse action or assessment by a regulator; • unanticipated competition; • a loss of key personnel; • a more-likely-than-not expectation that a reporting unit or a significant portion of a reporting unit will be sold or otherwise disposed of; and • the testing for recoverability of a significant asset group within a reporting unit.
Loan Servicing Rights	Loan Servicing Rights For residential real estate loans that are sold with servicing retained, servicing rights are initially recorded at fair value in other assets and gain on sale of loans. Fair value is based on market prices for comparable mortgage servicing contracts. The servicing asset is subsequently measured using the amortization method which requires the servicing rights to be amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Loan servicing rights are evaluated for impairment based upon the fair value of the servicing rights compared to the carrying value. Impairment is recognized through a valuation allowance, to the extent that fair value is less than the carrying value. If the Company later determines that all or a portion of the impairment no longer exists, a reduction in the valuation allowance may be recorded. Changes in the valuation allowance are recorded in other income. The fair value of the servicing assets are subject to significant fluctuations as a result of changes in estimated actual prepayment speeds and default rates and losses.
Equity Securities	Equity Securities Non-marketable equity securities primarily consist of Federal Home Loan Bank (“FHLB”) stock. FHLB stock is restricted because such stock may only be sold to FHLB at its par value. Due to restrictive terms, and the lack of a readily determinable fair value, FHLB stock is carried at cost and evaluated for impairment. The investments in FHLB stock are required investments related to the Company’s borrowings from FHLB. FHLB obtains its funding primarily through issuance of consolidated obligations of the FHLB system. The U.S. government does not guarantee these obligations, and each of the regional FHLBs is jointly and severally liable for repayment of each other’s debt.
Other Borrowings	Other BorrowingsBorrowings of the Company’s consolidated variable interest entities and finance lease arrangements are included in other borrowings.
Bank-Owned Life Insurance	Bank-Owned Life InsuranceThe Company maintains bank-owned life insurance policies on certain current and former employees and directors, which are recorded at their cash surrender values as determined by the insurance carriers. The appreciation in the cash surrender value of the policies is recognized as a component of other non-interest income in the Company’s statements of operations.
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company is exposed to certain risks relating to its ongoing operations. The primary risk managed by using derivative instruments is interest risk. Interest rate caps and interest rate swaps have been entered into to manage interest rate risk associated with variable rate borrowings and were designated as cash flow hedges. The Company does not enter into derivative instruments for trading or speculative purposes.
Revenue Recognition	Revenue Recognition The Company recognizes revenue when services or products are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled. The Company’s principal source of revenue is interest income from debt securities and loans. Revenue from contracts with customers within the scope of ASC Topic 606 was $45,789,000 and $40,184,000 for the nine months ended September 30, 2021 and 2020, respectively, and largely consisted of revenue from service charges and other fees from deposits (e.g., overdraft fees, ATM fees, debit card fees). Due to the short-term nature of the Company’s contracts with customers, an insignificant amount of receivables related to such revenue was recorded at September 30, 2021 and December 31, 2020 and there were no impairment losses recognized. Policies specific to revenue from contracts with customers include the following: Service Charges. Revenue from service charges consists of service charges and fees on deposit accounts under depository agreements with customers to provide access to deposited funds and, when applicable, pay interest on deposits. Service charges on deposit accounts may be transactional or non-transactional in nature. Transactional service charges occur in the form of a service or penalty and are charged upon the occurrence of an event (e.g., overdraft fees, ATM fees, wire transfer fees). Transactional service charges are recognized as services are delivered to and consumed by the customer, or as penalty fees are charged. Non-transactional service charges are charges that are based on a broader service, such as account maintenance fees and dormancy fees, and are recognized on a monthly basis.
Accounting Guidance Adopted in 2020	Recently Issued Accounting GuidanceThe ASC is the FASB officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the Securities and Exchange Commission (“SEC”) under the authority of the federal securities laws are also sources of authoritative GAAP for the Company as an SEC registrant. All other accounting literature is non-authoritative. The Company has not adopted any ASU’s in the current year that may have had a material effect on the Company’s financial position or results of operations. Furthermore, there are no newly issued but not yet effective ASUs that could have a material effect on the Company’s financial position or results of operations.

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Provision for Credit Losses	The following table presents the provision for credit losses on the loan portfolio and off-balance sheet exposures: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Provision for credit loss loans $ 2,313 2,869 (2,921) 39,165 Provision for credit losses unfunded (1,588) 2,317 (1,959) 2,135 Total provision for credit losses $ 725 5,186 (4,880) 41,300 Three Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 151,448 10,143 96,597 31,983 7,837 4,888 Provision for credit losses 2,313 1,703 2,931 (3,321) (124) 1,124 Charge-offs (2,620) — (162) (677) — (1,781) Recoveries 2,468 13 672 860 152 771 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Three Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 162,509 9,986 89,104 48,838 9,962 4,619 Provision for credit losses 2,869 (216) 5,208 1,199 (2,526) (796) Charge-offs (2,630) — (445) (1,598) (99) (488) Recoveries 1,804 35 530 314 93 832 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167 Nine Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 158,243 9,604 86,999 49,133 8,182 4,325 Provision for credit losses (2,921) 2,005 11,663 (18,905) (491) 2,807 Charge-offs (8,566) (38) (203) (3,790) (45) (4,490) Recoveries 6,853 288 1,579 2,407 219 2,360 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Nine Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 124,490 10,111 69,496 36,129 4,937 3,817 Impact of adopting CECL 3,720 3,584 10,533 (13,759) 3,400 (38) Acquisitions 49 — 49 — — Provision for credit losses 39,165 (3,923) 14,084 28,358 (860) 1,506 Charge-offs (7,865) (21) (625) (3,471) (293) (3,455) Recoveries 4,993 54 860 1,496 246 2,337 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167

Debt Securities (Tables)

Debt Securities (Tables)	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized cost, gross unrealized gains and losses and fair value of debt securities	The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of the Company’s debt securities: September 30, 2021 (Dollars in thousands) Amortized Gross Gross Fair Available-for-sale U.S. government and federal agency $ 31,449 207 (283) 31,373 U.S. government sponsored enterprises 47,324 6 (279) 47,051 State and local governments 479,116 29,666 (91) 508,691 Corporate bonds 191,164 6,958 (3) 198,119 Residential mortgage-backed securities 5,498,676 13,982 (21,313) 5,491,345 Commercial mortgage-backed securities 1,081,008 36,640 (3,647) 1,114,001 Total available-for-sale $ 7,328,737 87,459 (25,616) 7,390,580 Held-to-maturity State and local governments $ 1,128,299 20,131 (1,977) 1,146,453 Total held-to-maturity $ 1,128,299 20,131 (1,977) 1,146,453 December 31, 2020 (Dollars in thousands) Amortized Gross Gross Fair Available-for-sale U.S. government and federal agency $ 38,568 287 (267) 38,588 U.S. government sponsored enterprises 9,747 34 — 9,781 State and local governments 1,321,763 94,974 (54) 1,416,683 Corporate bonds 336,867 12,239 (8) 349,098 Residential mortgage-backed securities 2,261,463 27,631 (4) 2,289,090 Commercial mortgage-backed securities 1,177,458 57,575 (459) 1,234,574 Total available-for-sale $ 5,145,866 192,740 (792) 5,337,814 Held-to-maturity State and local governments $ 189,836 13,380 — 203,216 Total held-to-maturity $ 189,836 13,380 — 203,216
Amortized cost and fair value of securities by contractual maturity	The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at September 30, 2021. Actual maturities may differ from expected or contractual maturities since some issuers have the right to prepay obligations with or without prepayment penalties. September 30, 2021 Available-for-Sale Held-to-Maturity (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 68,088 68,877 1,529 1,544 Due after one year through five years 186,292 195,336 27,382 29,114 Due after five years through ten years 250,903 259,085 89,010 94,026 Due after ten years 243,770 261,936 1,010,378 1,021,769 749,053 785,234 1,128,299 1,146,453 Mortgage-backed securities 1 6,579,684 6,605,346 — — Total $ 7,328,737 7,390,580 1,128,299 1,146,453 ______________________________ 1 Mortgage-backed securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.
Proceeds from sales and calls of debt securities and the associated gains and losses	Proceeds from sales and calls of debt securities and the associated gains and losses that have been included in earnings are listed below: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Available-for-sale Proceeds from sales and calls of debt securities $ 74,328 69,304 151,025 184,088 Gross realized gains 1 507 102 945 1,206 Gross realized losses 1 (9) (78) (75) (192) Held-to-maturity Proceeds from calls of debt securities 19,120 9,280 25,480 29,530 Gross realized gains 1 — — — 1 Gross realized losses 1 (666) — (815) — ______________________________ 1 The gain or loss on the sale or call of each debt security is determined by the specific identification method.
AFS debt securities in an unrealized loss position with no ACL recorded	The following table summarizes available-for-sale debt securities that were in an unrealized loss position for which an ACL has not been recorded, based on the length of time the individual securities have been in an unrealized loss position. The number of available-for-sale debt securities in an unrealized position is also disclosed. September 30, 2021 Number Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale U.S. government and federal agency 23 $ 9,736 (78) 5,398 (205) 15,134 (283) U.S. government sponsored enterprises 3 45,279 (279) — — 45,279 (279) State and local governments 11 15,596 (30) 1,742 (61) 17,338 (91) Corporate bonds 1 5,016 (3) — — 5,016 (3) Residential mortgage-backed securities 115 3,730,195 (21,312) 26 (1) 3,730,221 (21,313) Commercial mortgage-backed securities 21 79,332 (866) 114,338 (2,781) 193,670 (3,647) Total available-for-sale 174 $ 3,885,154 (22,568) 121,504 (3,048) 4,006,658 (25,616) Held-to-maturity State and local governments 126 $ 317,479 (1,977) — — 317,479 (1,977) Total held-to-maturity 126 $ 317,479 (1,977) — — 317,479 (1,977) December 31, 2020 Number Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale U.S. government and federal agency 18 $ 13,814 (258) 726 (9) 14,540 (267) State and local governments 6 3,121 (54) — — 3,121 (54) Corporate bonds 3 5,500 (8) — — 5,500 (8) Residential mortgage-backed securities 14 2,354 (4) 27 — 2,381 (4) Commercial mortgage-backed securities 5 120,741 (459) — — 120,741 (459) Total available-for-sale 46 $ 145,530 (783) 753 (9) 146,283 (792)
Credit quality indictors for HTM debt securities	The following table summarizes the amortized cost of held-to-maturity debt securities aggregated by NRSRO credit rating: (Dollars in thousands) September 30, December 31, Held-to-maturity S&P: AAA / Moody’s: Aaa $ 274,791 39,022 S&P: AA+, AA, AA- / Moody’s: Aa1, Aa2, Aa3 812,759 123,664 S&P: A+, A, A- / Moody’s: A1, A2, A3 38,739 27,150 S&P: BBB+, BBB, BBB- / Moody’s: Baa1, Baa2, Baa3 — — Not rated by either entity 2,010 — Below investment grade — — Total held-to-maturity $ 1,128,299 189,836

Loans Receivable, Net (Tables)

Loans Receivable, Net (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Summary of loans receivable	The following table presents loans receivable for each portfolio segment of loans: (Dollars in thousands) September 30, December 31, Residential real estate $ 781,538 802,508 Commercial real estate 6,912,569 6,315,895 Other commercial 2,598,616 3,054,817 Home equity 660,920 636,405 Other consumer 340,248 313,071 Loans receivable 11,293,891 11,122,696 Allowance for credit losses (153,609) (158,243) Loans receivable, net $ 11,140,282 10,964,453 Net deferred origination (fees) costs included in loans receivable $ (26,325) (26,709) Net purchase accounting (discounts) premiums included in loans receivable $ (12,458) (17,091) Accrued interest receivable on loans $ 50,229 53,538
Summary of the activity in the ACL	The following table presents the provision for credit losses on the loan portfolio and off-balance sheet exposures: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Provision for credit loss loans $ 2,313 2,869 (2,921) 39,165 Provision for credit losses unfunded (1,588) 2,317 (1,959) 2,135 Total provision for credit losses $ 725 5,186 (4,880) 41,300 Three Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 151,448 10,143 96,597 31,983 7,837 4,888 Provision for credit losses 2,313 1,703 2,931 (3,321) (124) 1,124 Charge-offs (2,620) — (162) (677) — (1,781) Recoveries 2,468 13 672 860 152 771 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Three Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 162,509 9,986 89,104 48,838 9,962 4,619 Provision for credit losses 2,869 (216) 5,208 1,199 (2,526) (796) Charge-offs (2,630) — (445) (1,598) (99) (488) Recoveries 1,804 35 530 314 93 832 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167 Nine Months ended September 30, 2021 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 158,243 9,604 86,999 49,133 8,182 4,325 Provision for credit losses (2,921) 2,005 11,663 (18,905) (491) 2,807 Charge-offs (8,566) (38) (203) (3,790) (45) (4,490) Recoveries 6,853 288 1,579 2,407 219 2,360 Balance at end of period $ 153,609 11,859 100,038 28,845 7,865 5,002 Nine Months ended September 30, 2020 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 124,490 10,111 69,496 36,129 4,937 3,817 Impact of adopting CECL 3,720 3,584 10,533 (13,759) 3,400 (38) Acquisitions 49 — 49 — — Provision for credit losses 39,165 (3,923) 14,084 28,358 (860) 1,506 Charge-offs (7,865) (21) (625) (3,471) (293) (3,455) Recoveries 4,993 54 860 1,496 246 2,337 Balance at end of period $ 164,552 9,805 94,397 48,753 7,430 4,167
Loan portfolio aging analysis	The following tables present an aging analysis of the recorded investment in loans: September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other Accruing loans 30-59 days past due $ 9,541 — 2,662 2,071 2,438 2,370 Accruing loans 60-89 days past due 16,461 1,137 13,538 862 656 268 Accruing loans 90 days or more past due 5,172 52 2,785 2,083 98 154 Non-accrual loans with no ACL 24,989 2,173 10,144 9,753 2,406 513 Non-accrual loans with ACL 20,912 292 474 20,041 51 54 Total past due and non-accrual loans 77,075 3,654 29,603 34,810 5,649 3,359 Current loans receivable 11,216,816 777,884 6,882,966 2,563,806 655,271 336,889 Total loans receivable $ 11,293,891 781,538 6,912,569 2,598,616 660,920 340,248 December 31, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other Accruing loans 30-59 days past due $ 17,123 6,058 3,854 4,039 2,130 1,042 Accruing loans 60-89 days past due 5,598 584 2,299 809 756 1,150 Accruing loans 90 days or more past due 1,725 934 231 293 135 132 Non-accrual loans with no ACL 29,532 3,129 14,030 9,231 2,664 478 Non-accrual loans with ACL 2,432 274 1,787 278 49 44 Total past due and non-accrual loans 56,410 10,979 22,201 14,650 5,734 2,846 Current loans receivable 11,066,286 791,529 6,293,694 3,040,167 630,671 310,225 Total loans receivable $ 11,122,696 802,508 6,315,895 3,054,817 636,405 313,071
Collateral dependent loans	The following table presents the amortized cost basis of collateral-dependent loans by collateral type: September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other Business assets $ 26,992 — 60 26,932 — — Residential real estate 5,558 2,412 569 126 2,276 175 Other real estate 24,255 646 20,976 2,114 181 338 Other 12,728 — — 12,390 — 338 Total $ 69,533 3,058 21,605 41,562 2,457 851 December 31, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other Business assets $ 4,325 — 37 4,288 — — Residential real estate 7,148 3,338 1,043 198 2,513 56 Other real estate 16,127 64 14,738 1,086 200 39 Other 36,855 — — 36,469 — 386 Total $ 64,455 3,402 15,818 42,041 2,713 481
Summary of TDRs	The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented: Three Months ended September 30, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 6 — 5 1 — — Pre-modification recorded balance $ 7,482 — 6,648 834 — — Post-modification recorded balance $ 7,482 — 6,648 834 — — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2021 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 10 1 5 3 — 1 Pre-modification recorded balance $ 2,368 210 1,473 554 — 131 Post-modification recorded balance $ 2,368 210 1,473 554 — 131 TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2020 (Dollars in thousands) Total Residential Commercial Other Home Other TDRs that occurred during the period Number of loans 16 1 10 4 1 — Pre-modification recorded balance $ 14,945 210 13,392 1,304 39 — Post-modification recorded balance $ 14,945 210 13,392 1,304 39 — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — —
Credit quality indicators for commercial loans	The following tables present the amortized cost in commercial real estate and other commercial loans based on the Company’s internal risk rating. The date of a modification, renewal or extension of a loan is considered for the year of origination if the terms of the loan are as favorable to the Company as the terms are for a comparable loan to other borrowers with similar credit risk. September 30, 2021 (Dollars in thousands) Total Pass Special Mention Substandard Doubtful/ Commercial real estate loans Term loans by origination year 2021 (year-to-date) $ 1,665,923 1,664,908 — 1,015 — 2020 1,310,854 1,306,097 — 4,757 — 2019 883,727 872,635 — 11,092 — 2018 748,629 695,068 — 53,561 — 2017 558,997 531,073 — 27,924 — Prior 1,598,606 1,547,558 — 51,023 25 Revolving loans 145,833 142,781 — 3,051 1 Total $ 6,912,569 6,760,120 — 152,423 26 Other commercial loans 1 Term loans by origination year 2021 (year-to-date) $ 694,243 690,542 — 3,701 — 2020 477,065 461,088 — 15,976 1 2019 239,843 230,852 — 8,988 3 2018 184,542 178,564 — 5,977 1 2017 215,294 214,143 — 1,148 3 Prior 314,426 300,084 — 13,792 550 Revolving loans 473,203 443,561 — 29,626 16 Total $ 2,598,616 2,518,834 — 79,208 574 ___________________________ 1 Includes PPP loans. December 31, 2020 (Dollars in thousands) Total Pass Special Mention Substandard Doubtful/ Commercial real estate loans Term loans by origination year 2020 $ 1,496,094 1,490,947 — 5,147 — 2019 1,077,461 1,069,503 — 7,958 — 2018 914,506 874,673 — 39,833 — 2017 723,448 696,371 — 27,077 — 2016 496,275 481,392 — 14,883 — Prior 1,488,281 1,450,596 — 37,574 111 Revolving loans 119,830 116,548 — 3,282 — Total $ 6,315,895 6,180,030 — 135,754 111 Other commercial loans 1 Term loans by origination year 2020 $ 1,366,664 1,341,316 19,564 5,784 — 2019 304,430 284,981 12,582 6,864 3 2018 241,222 234,988 — 6,233 1 2017 269,857 264,651 — 5,114 92 2016 179,225 177,164 — 2,056 5 Prior 218,306 206,431 — 11,329 546 Revolving loans 475,113 467,929 54 7,112 18 Total $ 3,054,817 2,977,460 32,200 44,492 665 ______________________________ 1 Includes PPP loans.
Credit quality indicators for RRE and consumer loans	The following tables present the amortized cost in residential real estate, home equity and other consumer loans based on payment performance: September 30, 2021 (Dollars in thousands) Total Performing 30-89 Days Past Due Non-Accrual and 90 Days or More Past Due Residential real estate loans Term loans by origination year 2021 (year-to-date) $ 256,012 256,012 — — 2020 177,765 177,617 148 — 2019 78,061 78,061 — — 2018 56,371 56,088 — 283 2017 50,489 49,418 892 179 Prior 160,662 158,510 97 2,055 Revolving loans 2,178 2,178 — — Total $ 781,538 777,884 1,137 2,517 Home equity loans Term loans by origination year 2021 (year-to-date) $ 38 38 — — 2020 67 67 — — 2019 589 555 — 34 2018 887 887 — — 2017 783 783 — — Prior 10,780 10,114 161 505 Revolving loans 647,776 642,827 2,933 2,016 Total $ 660,920 655,271 3,094 2,555 Other consumer loans Term loans by origination year 2021 (year-to-date) $ 127,963 127,893 65 5 2020 87,303 87,072 189 42 2019 42,347 41,943 172 232 2018 23,468 23,180 94 194 2017 9,548 9,495 42 11 Prior 19,132 16,871 2,042 219 Revolving loans 30,487 30,435 34 18 Total $ 340,248 336,889 2,638 721 December 31, 2020 (Dollars in thousands) Total Performing 30-89 Days Past Due Non-Accrual and 90 Days or More Past Due Residential real estate loans Term loans by origination year 2020 $ 208,679 207,432 1,247 — 2019 181,924 179,915 2,009 — 2018 100,273 99,135 556 582 2017 76,394 75,527 867 — 2016 53,819 52,905 87 827 Prior 179,085 174,281 1,876 2,928 Revolving loans 2,334 2,334 — — Total $ 802,508 791,529 6,642 4,337 Home equity loans Term loans by origination year 2020 $ 89 89 — — 2019 807 771 — 36 2018 1,782 1,782 — — 2017 1,452 1,426 26 — 2016 1,016 1,016 — — Prior 14,025 13,042 463 520 Revolving loans 617,234 612,545 2,397 2,292 Total $ 636,405 630,671 2,886 2,848 Other consumer loans Term loans by origination year 2020 $ 131,302 131,098 158 46 2019 66,327 65,921 170 236 2018 42,827 42,557 212 58 2017 16,287 16,202 38 47 2016 10,519 10,409 48 62 Prior 18,692 17,334 1,155 203 Revolving loans 27,117 26,704 411 2 Total $ 313,071 310,225 2,192 654

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Assets and liabilities, lessee	The following table summarizes the Company’s leases: September 30, 2021 December 31, 2020 (Dollars in thousands) Finance Operating Finance Operating ROU assets $ 5,999 5,999 Accumulated depreciation (457) (273) Net ROU assets $ 5,542 44,480 5,726 46,820 Lease liabilities $ 5,810 47,590 5,891 49,675 Weighted-average remaining lease term 23 years 17 years 24 years 17 years Weighted-average discount rate 2.6 % 3.5 % 2.6 % 3.4 %
Operating lease liability maturity	Maturities of lease liabilities consist of the following: September 30, 2021 (Dollars in thousands) Finance Operating Maturing within one year $ 66 1,219 Maturing one year through two years 266 4,625 Maturing two years through three years 272 3,973 Maturing three years through four years 280 3,932 Maturing four years through five years 285 3,859 Thereafter 6,736 47,447 Total lease payments 7,905 65,055 Present value of lease payments Short-term 28 1,527 Long-term 5,782 46,063 Total present value of lease payments 5,810 47,590 Difference between lease payments and present value of lease payments $ 2,095 17,465
Finance lease liability maturity	Maturities of lease liabilities consist of the following: September 30, 2021 (Dollars in thousands) Finance Operating Maturing within one year $ 66 1,219 Maturing one year through two years 266 4,625 Maturing two years through three years 272 3,973 Maturing three years through four years 280 3,932 Maturing four years through five years 285 3,859 Thereafter 6,736 47,447 Total lease payments 7,905 65,055 Present value of lease payments Short-term 28 1,527 Long-term 5,782 46,063 Total present value of lease payments 5,810 47,590 Difference between lease payments and present value of lease payments $ 2,095 17,465
Components of lease expense	The components of lease expense consist of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Finance lease cost Amortization of ROU assets $ 61 59 184 174 Interest on lease liabilities 38 40 113 121 Operating lease cost 1,302 1,254 3,883 3,553 Short-term lease cost 93 88 261 266 Variable lease cost 264 264 759 977 Sublease income (11) (2) (32) (5) Total lease expense $ 1,747 1,703 5,168 5,086 Supplemental cash flow information related to leases is as follows: Three Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 38 813 40 706 Financing cash flows 27 N/A 23 N/A Nine Months ended September 30, 2021 September 30, 2020 (Dollars in thousands) Finance Operating Finance Operating Cash paid for amounts included in the measurement of lease liabilities Operating cash flows $ 113 2,379 121 1,994 Financing cash flows 81 N/A 67 N/A

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The following schedule discloses the changes in the carrying value of goodwill: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net carrying value at beginning of period $ 514,013 513,355 514,013 456,418 Acquisitions and adjustments — 658 — 57,595 Net carrying value at end of period $ 514,013 514,013 514,013 514,013

Loan Servicing (Tables)

Loan Servicing (Tables)	9 Months Ended
	Sep. 30, 2021
Mortgage Banking [Abstract]
Servicing Asset at Amortized Cost	The following schedules disclose the change in the carrying value of mortgage servicing rights that is included in other assets, principal balances of loans serviced and the fair value of mortgage servicing rights: (Dollars in thousands) September 30, December 31, Carrying value at beginning of period $ 8,976 1,618 Additions 3,996 8,298 Amortization (1,327) (940) Carrying value at end of period $ 11,645 8,976 Principal balances of loans serviced for others $ 1,511,199 1,269,080 Fair value of servicing rights $ 15,477 12,087

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Carrying amounts of consolidated VIEs' assets and liabilities	The following table summarizes the carrying amounts of the consolidated VIEs’ assets and liabilities included in the Company’s statements of financial condition and are adjusted for intercompany eliminations. All assets presented can be used only to settle obligations of the consolidated VIEs and all liabilities presented consist of liabilities for which creditors and other beneficial interest holders therein have no recourse to the general credit of the Company. (Dollars in thousands) September 30, December 31, Assets Loans receivable $ 108,717 90,183 Accrued interest receivable 603 410 Other assets 41,135 40,282 Total assets $ 150,455 130,875 Liabilities Other borrowed funds $ 27,861 27,176 Accrued interest payable 174 53 Other liabilities 51 171 Total liabilities $ 28,086 27,400
Future unfunded contingent commitments	Future unfunded contingent equity commitments related to the Company’s LIHTC investments at September 30, 2021 are as follows: (Dollars in thousands) Amount Years ending December 31, 2021 $ 7,237 2022 28,759 2023 26,446 2024 8,937 2025 300 Thereafter 1,178 Total $ 72,857
Amortization expense and tax credits and other tax benefits recognized for qualified affordable housing project investments	The following table summarizes the amortization expense and the amount of tax credits and other tax benefits recognized for qualified affordable housing project investments during the periods presented. Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amortization expense $ 1,604 1,936 6,330 5,766 Tax credits and other tax benefits recognized 2,983 2,608 9,260 7,771

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2021
Transfers and Servicing [Abstract]
Carrying value of repurchase agreements	The following table summarizes the carrying value of the Company’s securities sold under agreements to repurchase (“repurchase agreements”) by remaining contractual maturity of the agreements and category of collateral: Overnight and Continuous (Dollars in thousands) September 30, December 31, State and local governments $ 118,957 787,016 Corporate bonds 137,461 217,567 Residential mortgage-backed securities 773,204 — Commercial mortgage-backed securities 11,317 — Total $ 1,040,939 1,004,583

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of pre-tax gains or losses	The effect of cash flow hedge accounting on OCI for the periods ending September 30, 2021 and 2020 was as follows: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amount of gain (loss) recognized in OCI $ 30 (76) 479 (532)

Other Expenses (Tables)

Other Expenses (Tables)	9 Months Ended
	Sep. 30, 2021
Other Expenses [Abstract]
Schedule of other expenses	Other expenses consists of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Consulting and outside services $ 3,003 4,050 7,918 8,604 Loan expenses 1,649 1,743 5,028 3,732 VIE amortization and other expenses 1,668 1,510 4,342 3,396 Telephone 1,330 1,314 4,044 3,865 Debit card expenses 1,469 1,414 3,761 3,704 Business development 1,360 1,139 3,230 3,110 Postage 894 851 2,729 2,479 Printing and supplies 840 877 2,453 2,704 Employee expenses 953 560 2,137 2,247 Mergers and acquisition expenses 472 792 1,654 7,311 Legal fees 283 206 1,075 1,025 Checking and operating expenses 307 355 1,061 1,263 Accounting and audit fees 172 455 865 1,453 (Gain) loss on dispositions of fixed assets (65) — (1,463) 125 Other 985 1,203 3,092 3,076 Total other expenses $ 15,320 16,469 41,926 48,094

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Activity within accumulated other comprehensive income, net of tax	The following table illustrates the activity within accumulated other comprehensive income (loss) by component, net of tax: (Dollars in thousands) Gains (Losses) on Available-For-Sale and Transferred Debt Securities (Losses) Gains on Derivatives Used for Cash Flow Hedges Total Balance at January 1, 2020 $ 40,226 — 40,226 Other comprehensive income (loss) before reclassifications 92,027 (397) 91,630 Reclassification adjustments for gains included in net income (loss) (758) — (758) Net current period other comprehensive income (loss) 91,269 (397) 90,872 Balance at September 30, 2020 $ 131,495 (397) 131,098 Balance at January 1, 2021 $ 143,443 (353) 143,090 Other comprehensive (loss) income before reclassifications (63,468) 359 (63,109) Reclassification adjustments for gains and transfers included in net income (650) — (650) Reclassification adjustments for amortization included in net income for transferred securities (1,672) — (1,672) Net current period other comprehensive (loss) income (65,790) 359 (65,431) Balance at September 30, 2021 $ 77,653 6 77,659

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Basic and diluted earnings per share	Basic and diluted earnings per share has been computed based on the following: Three Months ended Nine Months ended (Dollars in thousands, except per share data) September 30, September 30, September 30, September 30, Net income available to common stockholders, basic and diluted $ 75,619 77,757 234,048 184,540 Average outstanding shares - basic 95,510,772 95,411,656 95,494,211 94,704,198 Add: dilutive restricted stock units and stock options 75,430 30,920 79,308 43,696 Average outstanding shares - diluted 95,586,202 95,442,576 95,573,519 94,747,894 Basic earnings per share $ 0.79 0.81 2.45 1.95 Diluted earnings per share $ 0.79 0.81 2.45 1.95 Restricted stock units and stock options excluded from the diluted average outstanding share calculation 1 — 93,253 — 78,605 ______________________________ 1 Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock unit or the exercise price of a stock option exceeds the market price of the Company’s stock.

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair value measurement of assets measured at fair value on a recurring basis	The following tables disclose the fair value measurement of assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements (Dollars in thousands) Fair Value September 30, 2021 Quoted Prices Significant Significant Debt securities, available-for-sale U.S. government and federal agency $ 31,373 — 31,373 — U.S. government sponsored enterprises 47,051 — 47,051 — State and local governments 508,691 — 508,691 — Corporate bonds 198,119 — 198,119 — Residential mortgage-backed securities 5,491,345 — 5,491,345 — Commercial mortgage-backed securities 1,114,001 — 1,114,001 — Loans held for sale, at fair value 94,138 — 94,138 — Interest rate caps 553 — 553 — Interest rate locks 3,884 — 3,884 — TBA hedge 759 — 759 — Total assets measured at fair value on a recurring basis $ 7,489,914 — 7,489,914 — Fair Value Measurements (Dollars in thousands) Fair Value December 31, 2020 Quoted Prices Significant Significant Debt securities, available-for-sale U.S. government and federal agency $ 38,588 — 38,588 — U.S. government sponsored enterprises 9,781 — 9,781 — State and local governments 1,416,683 — 1,416,683 — Corporate bonds 349,098 — 349,098 — Residential mortgage-backed securities 2,289,090 — 2,289,090 — Commercial mortgage-backed securities 1,234,574 — 1,234,574 — Loans held for sale, at fair value 166,572 — 166,572 — Interest rate caps 201 — 201 — Interest rate locks 8,605 — 8,605 — Total assets measured at fair value on a recurring basis $ 5,513,192 — 5,513,192 — TBA hedge $ 2,056 — 2,056 — Total liabilities measured at fair value on a recurring basis $ 2,056 — 2,056 —
Fair value measurement of assets measured at fair value on a non-recurring basis	The following tables disclose the fair value measurement of assets with a recorded change during the period resulting from re-measuring the assets at fair value on a non-recurring basis: Fair Value Measurements (Dollars in thousands) Fair Value September 30, 2021 Quoted Prices Significant Significant Collateral-dependent impaired loans, net of ACL 28,651 — — 28,651 Fair Value Measurements (Dollars in thousands) Fair Value December 31, 2020 Quoted Prices Significant Significant Other real estate owned $ 564 — — 564 Collateral-dependent impaired loans, net of ACL 26,749 — — 26,749 Total assets measured at fair value on a non-recurring basis $ 27,313 — — 27,313
Quantitative information about assets measured at fair value on a non-recurring basis for which Level 3 inputs were used	The following tables present additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Fair Value September 30, 2021 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Collateral-dependent impaired loans, net of ACL $ 21,090 Cost approach Selling costs 10.0% - 10.0% (10.0%) 7,561 Sales comparison approach Selling costs 5.0% - 10.0% (5.1%) Adjustment to comparables 5.0% - 10.0% (5.5%) $ 28,651 Fair Value December 31, 2020 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 564 Sales comparison approach Selling costs 8.0% - 10.0% (9.0%) Collateral-dependent loans, net of ACL $ 144 Cost approach Selling costs 10.0% - 10.0% (10.0%) 25,309 Sales comparison approach Selling Costs 10.0% - 10.0% (0.1%) Adjustment to comparables 0.0% - 100.0% (11.1%) 1,296 Combined approach Selling costs 10.0% - 10.0% (10.0%) Discount rate 8.0% - 8.0% (8.0%) $ 26,749 ______________________________ 1 The range for selling cost inputs represents reductions to the fair value of the assets.
Carrying amounts and estimated fair values of financial instruments not carried at fair value	The following tables present the carrying amounts, estimated fair values and the level within the fair value hierarchy of the Company’s financial instruments not carried at fair value. Receivables and payables due in one year or less, equity securities without readily determinable fair values and deposits with no defined or contractual maturities are excluded. There have been no significant changes in the valuation techniques during the period ended September 30, 2021. Cash and cash equivalents : fair value is estimated at book value. Debt securities, held-to-maturity : fair value for held-to-maturity debt securities is estimated in the same manner as available-for sale debt securities, which is described above. Loans receivable, net of ACL : The loans were fair valued on an individual basis, with consideration given to the loans' underlying characteristics, including account types, remaining terms and balance, interest rates, past delinquencies, current market rates, etc. The model utilizes a discounted cash flow approach to estimate the fair value of the loans using various assumptions such as prepayment speeds, projected default probabilities, losses given defaults, etc. The discounted cash flow approach models the credit losses directly in the projected cash flows. The model applies various assumptions regarding credit, interest, and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Term Deposits : fair value of term deposits is estimated by discounting the future cash flows using rates of similar deposits with similar maturities. The market rates used were obtained from an independent third party based on current rates offered by the Company’s regional competitors. Repurchase agreements and other borrowed funds : fair value of term repurchase agreements and other term borrowings is estimated based on current repurchase rates and borrowing rates currently available to the Company for repurchases and borrowings with similar terms and maturities. The estimated fair value for overnight repurchase agreements and other borrowings is book value. Subordinated debentures : fair value of the subordinated debt is estimated by discounting the estimated future cash flows using current estimated market rates obtained from an independent third party. Off-balance sheet financial instrument s: unused lines of credit and letters of credit represent the principal categories of off-balance sheet financial instruments. The fair value of commitments is based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The fair value of unused lines of credit and letters of credit is not material; therefore, such commitments are not included in the following tables. Fair Value Measurements (Dollars in thousands) Carrying Amount September 30, 2021 Quoted Prices Significant Significant Financial assets Cash and cash equivalents $ 348,888 348,888 — — Debt securities, held-to-maturity 1,128,299 — 1,146,453 — Loans receivable, net of ACL 11,140,282 — — 11,352,711 Total financial assets $ 12,617,469 348,888 1,146,453 11,352,711 Financial liabilities Term deposits $ 919,852 — 922,810 — Repurchase agreements and other borrowed funds 1,074,610 — 1,074,610 — Subordinated debentures 132,580 — 130,081 — Total financial liabilities $ 2,127,042 — 2,127,501 — Fair Value Measurements (Dollars in thousands) Carrying Amount December 31, 2020 Quoted Prices Significant Significant Financial assets Cash and cash equivalents $ 633,142 633,142 — — Debt securities, held-to-maturity 189,836 — 203,216 — Loans receivable, net of ACL 10,964,453 — — 11,233,002 Total financial assets $ 11,787,431 633,142 203,216 11,233,002 Financial liabilities Term deposits $ 978,779 — 983,491 — Repurchase agreements and other borrowed funds 1,037,651 — 1,037,651 — Subordinated debentures 139,959 — 123,944 — Total financial liabilities $ 2,156,389 — 2,145,086 —

Nature of Operations and Summ_4

Nature of Operations and Summary of Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)bankDivision	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)componentoperatingSegmentbankDivisionquarter	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Property, Plant and Equipment
Number of bank divisions | bankDivision	16		16
Number of operating segments | operatingSegment			1
Federal reserve balance or cash on hand required	$ 0		$ 0
Forecasting period used to determine ACL | quarter			4
Number of components used in methodology in determining ACL | component			2
Provision for credit loss loans	2,313,000	$ 2,869,000	$ (2,921,000)	$ 39,165,000
Provision for credit losses unfunded	(1,588,000)	2,317,000	(1,959,000)	2,135,000
Provision for credit losses	725,000	5,186,000	(4,880,000)	41,300,000
Provision for credit losses on debt securities	0	$ 0	$ 0	0
Maximum term leases will be considered short-term			12 months
Maximum period up to which purchase price of business is allocated to assets acquired and liabilities assumed			1 year
Revenue from contracts with customers			$ 45,789,000	$ 40,184,000
Impairment losses on receivables related to contracts with customers	$ 0		$ 0		$ 0
Minimum
Property, Plant and Equipment
Period past due to consider loan as delinquent			30 days
Period past due to consider loan as non accrual			90 days
Period past due to consider loan as purchased credit-deteriorated loan			90 days
Number of days delinquent to charge off loans			120 days
Number of years for home equity loan origination term			10 years
Minimum | Building
Property, Plant and Equipment
Useful life of premises and equipment			15 years
Minimum | Furniture and Fixtures
Property, Plant and Equipment
Useful life of premises and equipment			3 years
Maximum
Property, Plant and Equipment
Period past due to consider loan as delinquent			89 days
Number of years for home equity loan origination term			15 years
Maximum | Building
Property, Plant and Equipment
Useful life of premises and equipment			40 years
Maximum | Furniture and Fixtures
Property, Plant and Equipment
Useful life of premises and equipment			10 years

Debt Securities - Amortized Cos

Debt Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale
Amortized Cost	$ 7,328,737	$ 5,145,866
Gross Unrealized Gains	87,459	192,740
Gross Unrealized Losses	(25,616)	(792)
Fair Value	7,390,580	5,337,814
Held-to-maturity
Amortized Cost	1,128,299	189,836
Gross Unrealized Gains	20,131	13,380
Gross Unrealized Losses	(1,977)	0
Fair Value	1,146,453	203,216
U.S. government and federal agency
Available-for-sale
Amortized Cost	31,449	38,568
Gross Unrealized Gains	207	287
Gross Unrealized Losses	(283)	(267)
Fair Value	31,373	38,588
U.S. government sponsored enterprises
Available-for-sale
Amortized Cost	47,324	9,747
Gross Unrealized Gains	6	34
Gross Unrealized Losses	(279)	0
Fair Value	47,051	9,781
State and local governments
Available-for-sale
Amortized Cost	479,116	1,321,763
Gross Unrealized Gains	29,666	94,974
Gross Unrealized Losses	(91)	(54)
Fair Value	508,691	1,416,683
Held-to-maturity
Amortized Cost	1,128,299	189,836
Gross Unrealized Gains	20,131	13,380
Gross Unrealized Losses	(1,977)	0
Fair Value	1,146,453	203,216
Corporate bonds
Available-for-sale
Amortized Cost	191,164	336,867
Gross Unrealized Gains	6,958	12,239
Gross Unrealized Losses	(3)	(8)
Fair Value	198,119	349,098
Residential mortgage-backed securities
Available-for-sale
Amortized Cost	5,498,676	2,261,463
Gross Unrealized Gains	13,982	27,631
Gross Unrealized Losses	(21,313)	(4)
Fair Value	5,491,345	2,289,090
Commercial mortgage-backed securities
Available-for-sale
Amortized Cost	1,081,008	1,177,458
Gross Unrealized Gains	36,640	57,575
Gross Unrealized Losses	(3,647)	(459)
Fair Value	$ 1,114,001	$ 1,234,574

Debt Securities - Maturity Sche

Debt Securities - Maturity Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available-for-Sale, Amortized Cost
Due within one year	$ 68,088
Due after one year through five years	186,292
Due after five years through ten years	250,903
Due after ten years	243,770
Total before mortgage-backed securities	749,053
Mortgage-backed securities	6,579,684
Amortized Cost	7,328,737	$ 5,145,866
Available-for-Sale, Fair Value
Due within one year	68,877
Due after one year through five years	195,336
Due after five years through ten years	259,085
Due after ten years	261,936
Total before mortgage-backed securities	785,234
Mortgage-backed securities	6,605,346
Debt securities, available-for-sale	7,390,580	5,337,814
Held-to-Maturity, Amortized Cost
Due within one year	1,529
Due after one year through five years	27,382
Due after five years through ten years	89,010
Due after ten years	1,010,378
Total before mortgage-backed securities	1,128,299
Mortgage-backed securities	0
Amortized Cost	1,128,299	189,836
Held-to-Maturity, Fair Value
Due within one year	1,544
Due after one year through five years	29,114
Due after five years through ten years	94,026
Due after ten years	1,021,769
Total before mortgage-backed securities	1,146,453
Mortgage-backed securities	0
Total	$ 1,146,453	$ 203,216

Debt Securities - Proceeds From

Debt Securities - Proceeds From Sales and Calls of Debt Securities and Associates Gains or Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Available-for-sale
Proceeds from sales and calls of debt securities	$ 74,328	$ 69,304	$ 151,025	$ 184,088
Gross realized gains	507	102	945	1,206
Gross realized losses	(9)	(78)	(75)	(192)
Held-to-maturity
Proceeds from calls of debt securities	19,120	9,280	25,480	29,530
Gross realized gains	0	0	0	1
Gross realized losses	$ (666)	$ 0	$ (815)	$ 0

Debt Securities - AFS Debt Secu

Debt Securities - AFS Debt Securities in an Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Available-for-sale
Number of available-for-sale securities | security	174	46
Less than 12 months, fair value	$ 3,885,154	$ 145,530
Less than 12 months, unrealized loss	(22,568)	(783)
12 months or more, fair value	121,504	753
12 months or more, unrealized loss	(3,048)	(9)
Total, fair value	4,006,658	146,283
Total, unrealized loss	$ (25,616)	$ (792)
Held-to-maturity
Number of held-to-maturity securities | security	126
Less than 12 Months	$ 317,479
Less than 12 Months	(1,977)
12 Months or More	0
12 Months or More	0
Total, fair value	317,479
Total, unrealized loss	$ (1,977)
U.S. government and federal agency
Available-for-sale
Number of available-for-sale securities | security	23	18
Less than 12 months, fair value	$ 9,736	$ 13,814
Less than 12 months, unrealized loss	(78)	(258)
12 months or more, fair value	5,398	726
12 months or more, unrealized loss	(205)	(9)
Total, fair value	15,134	14,540
Total, unrealized loss	$ (283)	$ (267)
U.S. government sponsored enterprises
Available-for-sale
Number of available-for-sale securities | security	3
Less than 12 months, fair value	$ 45,279
Less than 12 months, unrealized loss	(279)
12 months or more, fair value	0
12 months or more, unrealized loss	0
Total, fair value	45,279
Total, unrealized loss	$ (279)
State and local governments
Available-for-sale
Number of available-for-sale securities | security	11	6
Less than 12 months, fair value	$ 15,596	$ 3,121
Less than 12 months, unrealized loss	(30)	(54)
12 months or more, fair value	1,742	0
12 months or more, unrealized loss	(61)	0
Total, fair value	17,338	3,121
Total, unrealized loss	$ (91)	$ (54)
Held-to-maturity
Number of held-to-maturity securities | security	126
Less than 12 Months	$ 317,479
Less than 12 Months	(1,977)
12 Months or More	0
12 Months or More	0
Total, fair value	317,479
Total, unrealized loss	$ (1,977)
Corporate bonds
Available-for-sale
Number of available-for-sale securities | security	1	3
Less than 12 months, fair value	$ 5,016	$ 5,500
Less than 12 months, unrealized loss	(3)	(8)
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
Total, fair value	5,016	5,500
Total, unrealized loss	$ (3)	$ (8)
Residential mortgage-backed securities
Available-for-sale
Number of available-for-sale securities | security	115	14
Less than 12 months, fair value	$ 3,730,195	$ 2,354
Less than 12 months, unrealized loss	(21,312)	(4)
12 months or more, fair value	26	27
12 months or more, unrealized loss	(1)	0
Total, fair value	3,730,221	2,381
Total, unrealized loss	$ (21,313)	$ (4)
Commercial mortgage-backed securities
Available-for-sale
Number of available-for-sale securities | security	21	5
Less than 12 months, fair value	$ 79,332	$ 120,741
Less than 12 months, unrealized loss	(866)	(459)
12 months or more, fair value	114,338	0
12 months or more, unrealized loss	(2,781)	0
Total, fair value	193,670	120,741
Total, unrealized loss	$ (3,647)	$ (459)

Debt Securities - Narrative (De

Debt Securities - Narrative (Details)	9 Months Ended
	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Severity rate on available-for-sale debt securities in an unrealized loss position	5.00%
Number of credit rating categories, highest | security	4
Debt securities, available-for-sale	$ 7,390,580,000	$ 5,337,814,000
Interest receivable, available-for-sale debt securities	17,791,000	20,215,000
ACL on available-for-sale debt securities	0
Debt securities, held-to-maturity	1,128,299,000	189,836,000
Interest receivable, held-to-maturity debt securities	11,664,000	1,728,000
ACL on held-to-maturity debt securities	0	0
Past due
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, available-for-sale	0	0
Debt securities, held-to-maturity	$ 0	$ 0

Debt Securities - Credit Qualit

Debt Securities - Credit Quality Indictors for HTM Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 1,128,299	$ 189,836
Investment Grade | Moody's: Aaa | S&P: AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	274,791	39,022
Investment Grade | Moody's: Aa1, Aa2, Aa3 | S&P: AA+, AA, AA-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	812,759	123,664
Investment Grade | Moody's: A1, A2, A3 | S&P: A+, A, A-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	38,739	27,150
Investment Grade | Moody’s: Baa1, Baa2, Baa3 | S&P's, BBB+, BBB, BBB-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	0	0
Investment Grade | Moody's: Not Rated | S&P: Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	2,010	0
Below investment grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 0	$ 0

Loans Receivable, Net - Summary

Loans Receivable, Net - Summary of Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Summary of Loans Receivable
Loans receivable	$ 11,293,891		$ 11,122,696
Allowance for credit losses	(153,609)	$ (151,448)	(158,243)	$ (164,552)	$ (162,509)	$ (124,490)
Loans receivable, net	11,140,282		10,964,453
Net deferred origination (fees) costs included in loans receivable	(26,325)		(26,709)
Net purchase accounting (discounts) premiums included in loans receivable	(12,458)		(17,091)
Accrued interest receivable on loans	50,229		53,538
Residential real estate
Summary of Loans Receivable
Loans receivable	781,538		802,508
Allowance for credit losses	(11,859)	(10,143)	(9,604)	(9,805)	(9,986)	(10,111)
Commercial real estate
Summary of Loans Receivable
Loans receivable	6,912,569		6,315,895
Allowance for credit losses	(100,038)	(96,597)	(86,999)	(94,397)	(89,104)	(69,496)
Other commercial
Summary of Loans Receivable
Loans receivable	2,598,616		3,054,817
Allowance for credit losses	(28,845)	(31,983)	(49,133)	(48,753)	(48,838)	(36,129)
Home equity
Summary of Loans Receivable
Loans receivable	660,920		636,405
Allowance for credit losses	(7,865)	(7,837)	(8,182)	(7,430)	(9,962)	(4,937)
Other consumer
Summary of Loans Receivable
Loans receivable	340,248		313,071
Allowance for credit losses	$ (5,002)	$ (4,888)	$ (4,325)	$ (4,167)	$ (4,619)	$ (3,817)

Loans Receivable, Net - ACL Act

Loans Receivable, Net - ACL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for credit losses
Balance at beginning of period	$ 151,448	$ 162,509	$ 158,243	$ 124,490
Impact of adopting CECL				3,720
Acquisitions				49
Provision for credit losses	2,313	2,869	(2,921)	39,165
Charge-offs	(2,620)	(2,630)	(8,566)	(7,865)
Recoveries	2,468	1,804	6,853	4,993
Balance at end of period	153,609	164,552	153,609	164,552
Residential real estate
Allowance for credit losses
Balance at beginning of period	10,143	9,986	9,604	10,111
Impact of adopting CECL				3,584
Acquisitions				0
Provision for credit losses	1,703	(216)	2,005	(3,923)
Charge-offs	0	0	(38)	(21)
Recoveries	13	35	288	54
Balance at end of period	11,859	9,805	11,859	9,805
Commercial real estate
Allowance for credit losses
Balance at beginning of period	96,597	89,104	86,999	69,496
Impact of adopting CECL				10,533
Acquisitions				49
Provision for credit losses	2,931	5,208	11,663	14,084
Charge-offs	(162)	(445)	(203)	(625)
Recoveries	672	530	1,579	860
Balance at end of period	100,038	94,397	100,038	94,397
Other commercial
Allowance for credit losses
Balance at beginning of period	31,983	48,838	49,133	36,129
Impact of adopting CECL				(13,759)
Acquisitions				0
Provision for credit losses	(3,321)	1,199	(18,905)	28,358
Charge-offs	(677)	(1,598)	(3,790)	(3,471)
Recoveries	860	314	2,407	1,496
Balance at end of period	28,845	48,753	28,845	48,753
Home equity
Allowance for credit losses
Balance at beginning of period	7,837	9,962	8,182	4,937
Impact of adopting CECL				3,400
Acquisitions
Provision for credit losses	(124)	(2,526)	(491)	(860)
Charge-offs	0	(99)	(45)	(293)
Recoveries	152	93	219	246
Balance at end of period	7,865	7,430	7,865	7,430
Other consumer
Allowance for credit losses
Balance at beginning of period	4,888	4,619	4,325	3,817
Impact of adopting CECL				(38)
Acquisitions				0
Provision for credit losses	1,124	(796)	2,807	1,506
Charge-offs	(1,781)	(488)	(4,490)	(3,455)
Recoveries	771	832	2,360	2,337
Balance at end of period	$ 5,002	$ 4,167	$ 5,002	$ 4,167

Loans Receivable, Net - Aging A

Loans Receivable, Net - Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	$ 11,293,891	$ 11,122,696
Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	9,541	17,123
Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	16,461	5,598
Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	5,172	1,725
Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	77,075	56,410
Non-accrual loans with no ACL	24,989	29,532
Non-accrual loans with ACL	20,912	2,432
Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	11,216,816	11,066,286
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	781,538	802,508
Residential real estate | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	0	6,058
Residential real estate | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,137	584
Residential real estate | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	52	934
Residential real estate | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	3,654	10,979
Non-accrual loans with no ACL	2,173	3,129
Non-accrual loans with ACL	292	274
Residential real estate | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	777,884	791,529
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	6,912,569	6,315,895
Commercial real estate | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,662	3,854
Commercial real estate | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	13,538	2,299
Commercial real estate | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,785	231
Commercial real estate | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	29,603	22,201
Non-accrual loans with no ACL	10,144	14,030
Non-accrual loans with ACL	474	1,787
Commercial real estate | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	6,882,966	6,293,694
Other commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,598,616	3,054,817
Other commercial | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,071	4,039
Other commercial | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	862	809
Other commercial | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,083	293
Other commercial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	34,810	14,650
Non-accrual loans with no ACL	9,753	9,231
Non-accrual loans with ACL	20,041	278
Other commercial | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,563,806	3,040,167
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	660,920	636,405
Home equity | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,438	2,130
Home equity | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	656	756
Home equity | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	98	135
Home equity | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	5,649	5,734
Non-accrual loans with no ACL	2,406	2,664
Non-accrual loans with ACL	51	49
Home equity | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	655,271	630,671
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	340,248	313,071
Other consumer | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	2,370	1,042
Other consumer | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	268	1,150
Other consumer | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	154	132
Other consumer | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	3,359	2,846
Non-accrual loans with no ACL	513	478
Non-accrual loans with ACL	54	44
Other consumer | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	$ 336,889	$ 310,225

Loans Receivable, Net - Narrati

Loans Receivable, Net - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan	Dec. 31, 2020USD ($)
Loans and Leases Receivable Disclosure
Interest reversed on non-accrual loans			$ 472	$ 628
Number of loans | Loan	0	6	10	16
TDR with pre modification loan balance for which OREO was received	$ 1,624	$ 2,265	$ 1,624	$ 2,265
Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	83		83		$ 548
OREO secured by residential real estate	$ 88		$ 88		$ 273

Loans Receivable, Net - Collate

Loans Receivable, Net - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Collateral Dependent Loans
Collateral dependent loans	$ 69,533	$ 64,455
Business assets
Collateral Dependent Loans
Collateral dependent loans	26,992	4,325
Residential real estate
Collateral Dependent Loans
Collateral dependent loans	5,558	7,148
Other real estate
Collateral Dependent Loans
Collateral dependent loans	24,255	16,127
Other
Collateral Dependent Loans
Collateral dependent loans	12,728	36,855
Residential real estate
Collateral Dependent Loans
Collateral dependent loans	3,058	3,402
Residential real estate | Business assets
Collateral Dependent Loans
Collateral dependent loans	0	0
Residential real estate | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	2,412	3,338
Residential real estate | Other real estate
Collateral Dependent Loans
Collateral dependent loans	646	64
Residential real estate | Other
Collateral Dependent Loans
Collateral dependent loans	0	0
Commercial real estate
Collateral Dependent Loans
Collateral dependent loans	21,605	15,818
Commercial real estate | Business assets
Collateral Dependent Loans
Collateral dependent loans	60	37
Commercial real estate | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	569	1,043
Commercial real estate | Other real estate
Collateral Dependent Loans
Collateral dependent loans	20,976	14,738
Commercial real estate | Other
Collateral Dependent Loans
Collateral dependent loans	0	0
Other commercial
Collateral Dependent Loans
Collateral dependent loans	41,562	42,041
Other commercial | Business assets
Collateral Dependent Loans
Collateral dependent loans	26,932	4,288
Other commercial | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	126	198
Other commercial | Other real estate
Collateral Dependent Loans
Collateral dependent loans	2,114	1,086
Other commercial | Other
Collateral Dependent Loans
Collateral dependent loans	12,390	36,469
Home equity
Collateral Dependent Loans
Collateral dependent loans	2,457	2,713
Home equity | Business assets
Collateral Dependent Loans
Collateral dependent loans	0	0
Home equity | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	2,276	2,513
Home equity | Other real estate
Collateral Dependent Loans
Collateral dependent loans	181	200
Home equity | Other
Collateral Dependent Loans
Collateral dependent loans	0	0
Other consumer
Collateral Dependent Loans
Collateral dependent loans	851	481
Other consumer | Business assets
Collateral Dependent Loans
Collateral dependent loans	0	0
Other consumer | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	175	56
Other consumer | Other real estate
Collateral Dependent Loans
Collateral dependent loans	338	39
Other consumer | Other
Collateral Dependent Loans
Collateral dependent loans	$ 338	$ 386

Loans Receivable, Net - Trouble

Loans Receivable, Net - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021Loan	Sep. 30, 2020USD ($)Loan	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan
TDRs that occurred during the period
Number of loans | Loan	0	6	10	16
Pre-modification recorded balance		$ 7,482	$ 2,368	$ 14,945
Post-modification recorded balance		$ 7,482	$ 2,368	$ 14,945
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0
Residential real estate
TDRs that occurred during the period
Number of loans | Loan		0	1	1
Pre-modification recorded balance		$ 0	$ 210	$ 210
Post-modification recorded balance		$ 0	$ 210	$ 210
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0
Commercial real estate
TDRs that occurred during the period
Number of loans | Loan		5	5	10
Pre-modification recorded balance		$ 6,648	$ 1,473	$ 13,392
Post-modification recorded balance		$ 6,648	$ 1,473	$ 13,392
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0
Other commercial
TDRs that occurred during the period
Number of loans | Loan		1	3	4
Pre-modification recorded balance		$ 834	$ 554	$ 1,304
Post-modification recorded balance		$ 834	$ 554	$ 1,304
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0
Home equity
TDRs that occurred during the period
Number of loans | Loan		0	0	1
Pre-modification recorded balance		$ 0	$ 0	$ 39
Post-modification recorded balance		$ 0	$ 0	$ 39
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0
Other consumer
TDRs that occurred during the period
Number of loans | Loan		0	1	0
Pre-modification recorded balance		$ 0	$ 131	$ 0
Post-modification recorded balance		$ 0	$ 131	$ 0
TDRs that subsequently defaulted
Number of loans | Loan		0	0	0
Recorded balance		$ 0	$ 0	$ 0

Loans Receivable, Net - Credit

Loans Receivable, Net - Credit Quality Indicators for Commercial Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Credit Quality Indicators By Origination
Total	$ 11,293,891	$ 11,122,696
Commercial real estate
Credit Quality Indicators By Origination
Term loans originated current fiscal year	1,665,923	1,496,094
Term loans originated fiscal year before current fiscal year	1,310,854	1,077,461
Term loans originated two years before current fiscal year	883,727	914,506
Term loans originated three years before current fiscal year	748,629	723,448
Term loans originated four years before current fiscal year	558,997	496,275
Term loans originated five years before current fiscal year	1,598,606	1,488,281
Revolving loans	145,833	119,830
Total	6,912,569	6,315,895
Commercial real estate | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	1,664,908	1,490,947
Term loans originated fiscal year before current fiscal year	1,306,097	1,069,503
Term loans originated two years before current fiscal year	872,635	874,673
Term loans originated three years before current fiscal year	695,068	696,371
Term loans originated four years before current fiscal year	531,073	481,392
Term loans originated five years before current fiscal year	1,547,558	1,450,596
Revolving loans	142,781	116,548
Total	6,760,120	6,180,030
Commercial real estate | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	0	0
Revolving loans	0	0
Total	0	0
Commercial real estate | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	1,015	5,147
Term loans originated fiscal year before current fiscal year	4,757	7,958
Term loans originated two years before current fiscal year	11,092	39,833
Term loans originated three years before current fiscal year	53,561	27,077
Term loans originated four years before current fiscal year	27,924	14,883
Term loans originated five years before current fiscal year	51,023	37,574
Revolving loans	3,051	3,282
Total	152,423	135,754
Commercial real estate | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	25	111
Revolving loans	1	0
Total	26	111
Other commercial
Credit Quality Indicators By Origination
Term loans originated current fiscal year	694,243	1,366,664
Term loans originated fiscal year before current fiscal year	477,065	304,430
Term loans originated two years before current fiscal year	239,843	241,222
Term loans originated three years before current fiscal year	184,542	269,857
Term loans originated four years before current fiscal year	215,294	179,225
Term loans originated five years before current fiscal year	314,426	218,306
Revolving loans	473,203	475,113
Total	2,598,616	3,054,817
Other commercial | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	690,542	1,341,316
Term loans originated fiscal year before current fiscal year	461,088	284,981
Term loans originated two years before current fiscal year	230,852	234,988
Term loans originated three years before current fiscal year	178,564	264,651
Term loans originated four years before current fiscal year	214,143	177,164
Term loans originated five years before current fiscal year	300,084	206,431
Revolving loans	443,561	467,929
Total	2,518,834	2,977,460
Other commercial | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	19,564
Term loans originated fiscal year before current fiscal year	0	12,582
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	0	0
Revolving loans	0	54
Total	0	32,200
Other commercial | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	3,701	5,784
Term loans originated fiscal year before current fiscal year	15,976	6,864
Term loans originated two years before current fiscal year	8,988	6,233
Term loans originated three years before current fiscal year	5,977	5,114
Term loans originated four years before current fiscal year	1,148	2,056
Term loans originated five years before current fiscal year	13,792	11,329
Revolving loans	29,626	7,112
Total	79,208	44,492
Other commercial | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	1	3
Term loans originated two years before current fiscal year	3	1
Term loans originated three years before current fiscal year	1	92
Term loans originated four years before current fiscal year	3	5
Term loans originated five years before current fiscal year	550	546
Revolving loans	16	18
Total	$ 574	$ 665

Loans Receivable, Net - Credi_2

Loans Receivable, Net - Credit Quality Indicators for RRE and Consumer Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Credit Quality Indicators By Origination
Total	$ 11,293,891	$ 11,122,696
Residential real estate
Credit Quality Indicators By Origination
Term loans originated current fiscal year	256,012	208,679
Term loans originated fiscal year before current fiscal year	177,765	181,924
Term loans originated two years before current fiscal year	78,061	100,273
Term loans originated three years before current fiscal year	56,371	76,394
Term loans originated four years before current fiscal year	50,489	53,819
Term loans originated five years before current fiscal year	160,662	179,085
Revolving loans	2,178	2,334
Total	781,538	802,508
Residential real estate | Performing
Credit Quality Indicators By Origination
Term loans originated current fiscal year	256,012	207,432
Term loans originated fiscal year before current fiscal year	177,617	179,915
Term loans originated two years before current fiscal year	78,061	99,135
Term loans originated three years before current fiscal year	56,088	75,527
Term loans originated four years before current fiscal year	49,418	52,905
Term loans originated five years before current fiscal year	158,510	174,281
Revolving loans	2,178	2,334
Total	777,884	791,529
Residential real estate | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	1,247
Term loans originated fiscal year before current fiscal year	148	2,009
Term loans originated two years before current fiscal year	0	556
Term loans originated three years before current fiscal year	0	867
Term loans originated four years before current fiscal year	892	87
Term loans originated five years before current fiscal year	97	1,876
Revolving loans	0	0
Total	1,137	6,642
Residential real estate | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	582
Term loans originated three years before current fiscal year	283	0
Term loans originated four years before current fiscal year	179	827
Term loans originated five years before current fiscal year	2,055	2,928
Revolving loans	0	0
Total	2,517	4,337
Home equity
Credit Quality Indicators By Origination
Term loans originated current fiscal year	38	89
Term loans originated fiscal year before current fiscal year	67	807
Term loans originated two years before current fiscal year	589	1,782
Term loans originated three years before current fiscal year	887	1,452
Term loans originated four years before current fiscal year	783	1,016
Term loans originated five years before current fiscal year	10,780	14,025
Revolving loans	647,776	617,234
Total	660,920	636,405
Home equity | Performing
Credit Quality Indicators By Origination
Term loans originated current fiscal year	38	89
Term loans originated fiscal year before current fiscal year	67	771
Term loans originated two years before current fiscal year	555	1,782
Term loans originated three years before current fiscal year	887	1,426
Term loans originated four years before current fiscal year	783	1,016
Term loans originated five years before current fiscal year	10,114	13,042
Revolving loans	642,827	612,545
Total	655,271	630,671
Home equity | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	26
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	161	463
Revolving loans	2,933	2,397
Total	3,094	2,886
Home equity | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	36
Term loans originated two years before current fiscal year	34	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	505	520
Revolving loans	2,016	2,292
Total	2,555	2,848
Other consumer
Credit Quality Indicators By Origination
Term loans originated current fiscal year	127,963	131,302
Term loans originated fiscal year before current fiscal year	87,303	66,327
Term loans originated two years before current fiscal year	42,347	42,827
Term loans originated three years before current fiscal year	23,468	16,287
Term loans originated four years before current fiscal year	9,548	10,519
Term loans originated five years before current fiscal year	19,132	18,692
Revolving loans	30,487	27,117
Total	340,248	313,071
Other consumer | Performing
Credit Quality Indicators By Origination
Term loans originated current fiscal year	127,893	131,098
Term loans originated fiscal year before current fiscal year	87,072	65,921
Term loans originated two years before current fiscal year	41,943	42,557
Term loans originated three years before current fiscal year	23,180	16,202
Term loans originated four years before current fiscal year	9,495	10,409
Term loans originated five years before current fiscal year	16,871	17,334
Revolving loans	30,435	26,704
Total	336,889	310,225
Other consumer | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	65	158
Term loans originated fiscal year before current fiscal year	189	170
Term loans originated two years before current fiscal year	172	212
Term loans originated three years before current fiscal year	94	38
Term loans originated four years before current fiscal year	42	48
Term loans originated five years before current fiscal year	2,042	1,155
Revolving loans	34	411
Total	2,638	2,192
Other consumer | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated current fiscal year	5	46
Term loans originated fiscal year before current fiscal year	42	236
Term loans originated two years before current fiscal year	232	58
Term loans originated three years before current fiscal year	194	47
Term loans originated four years before current fiscal year	11	62
Term loans originated five years before current fiscal year	219	203
Revolving loans	18	2
Total	$ 721	$ 654

Leases - Summary (Details)

Leases - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finance Leases
ROU assets	$ 5,999	$ 5,999
Accumulated depreciation	$ (457)	$ (273)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization
Net ROU assets	$ 5,542	$ 5,726
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Lease liabilities	$ 5,810	$ 5,891
Operating Leases
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization
Net ROU assets	$ 44,480	$ 46,820
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Lease liabilities	$ 47,590	$ 49,675
Finance lease, weighted average remaining lease term	23 years	24 years
Finance lease, weighted average discount rate	2.60%	2.60%
Operating lease, weighted average remaining lease term	17 years	17 years
Operating lease, weighted average discount rate	3.50%	3.40%

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finance Leases
Maturing within one year	$ 66
Maturing one year through two years	266
Maturing two years through three years	272
Maturing three years through four years	280
Maturing four years through five years	285
Thereafter	6,736
Total lease payments	7,905
Present value of lease payments
Short-term	28
Long-term	5,782
Total present value of lease payments	5,810	$ 5,891
Finance lease, difference between lease payments and present value of lease payments	2,095
Operating Leases
Maturing within one year	1,219
Maturing one year through two years	4,625
Maturing two years through three years	3,973
Maturing three years through four years	3,932
Maturing four years through five years	3,859
Thereafter	47,447
Total lease payments	65,055
Present value of lease payments
Short-term	1,527
Long-term	46,063
Total present value of lease payments	47,590	$ 49,675
Operating lease, difference between lease payments and present value of lease payments	$ 17,465

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Finance lease cost
Amortization of ROU assets	$ 61	$ 59	$ 184	$ 174
Interest on lease liabilities	38	40	113	121
Operating lease cost	1,302	1,254	3,883	3,553
Short-term lease cost	93	88	261	266
Variable lease cost	264	264	759	977
Sublease income	(11)	(2)	(32)	(5)
Total lease expense	$ 1,747	$ 1,703	$ 5,168	$ 5,086

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Finance lease, operating cash flows	$ 38	$ 40	$ 113	$ 121
Finance lease, financing cash flows	27	23	81	67
Operating lease, operating cash flows	$ 813	$ 706	$ 2,379	$ 1,994

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill Roll Forward
Net carrying value at beginning of period	$ 514,013	$ 513,355	$ 514,013	$ 456,418
Acquisitions and adjustments	0	658	0	57,595
Net carrying value at end of period	514,013	$ 514,013	514,013	$ 514,013
Accumulated impairment charge	$ 40,159		$ 40,159		$ 40,159

Loan Servicing (Details)

Loan Servicing (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Carrying value at beginning of period	$ 8,976	$ 1,618
Additions	3,996	8,298
Amortization	(1,327)	$ (940)
Carrying value at end of period	11,645
Principal balances of loans serviced for others	1,511,199		$ 1,269,080
Fair value of servicing rights	$ 15,477		$ 12,087

Variable Interest Entities - Na

Variable Interest Entities - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Variable Interest Entities
Impairment losses	$ 0	$ 0
Other assets
Variable Interest Entities
Carrying value of equity investments in LIHTCs	$ 49,074,000		$ 45,953,000
CDE
Variable Interest Entities
Tax credit period	7 years
LIHTC
Variable Interest Entities
Tax credit period	10 years
Tax credit compliance period	15 years

Variable Interest Entities - VI

Variable Interest Entities - VIE Carrying Amounts Included in Financial Statements (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Loans receivable, net	$ 11,140,282	$ 10,964,453
Accrued interest receivable	79,699	75,497
Other assets	120,028	106,505
Total assets	21,314,019	18,504,206
Liabilities
Other borrowed funds	33,671	33,068
Accrued interest payable	2,437	3,305
Other liabilities	211,647	194,861
Total liabilities	18,926,403	16,197,165
Consolidated VIEs
Assets
Loans receivable, net	108,717	90,183
Accrued interest receivable	603	410
Other assets	41,135	40,282
Total assets	150,455	130,875
Liabilities
Other borrowed funds	27,861	27,176
Accrued interest payable	174	53
Other liabilities	51	171
Total liabilities	$ 28,086	$ 27,400

Variable Interest Entities - Fu

Variable Interest Entities - Future Unfunded Contingent Commitments (Details) - Qualified Affordable Housing Project Investments $ in Thousands	Sep. 30, 2021USD ($)
Other Commitments
Unfunded contingent commitments expected to be fulfilled in 2021	$ 7,237
Unfunded contingent commitments expected to be fulfilled in 2022	28,759
Unfunded contingent commitments expected to be fulfilled in 2023	26,446
Unfunded contingent commitments expected to be fulfilled in 2024	8,937
Unfunded contingent commitments expected to be fulfilled in 2025	300
Unfunded contingent commitments expected to be fulfilled thereafter	1,178
Unfunded contingent commitments	$ 72,857

Variable Interest Entities - Am

Variable Interest Entities - Amortization Expense and Tax Credits and Other Tax Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments in Qualified Affordable Housing Projects
Amortization expense	$ 1,604	$ 1,936	$ 6,330	$ 5,766
Tax credits and other tax benefits recognized	$ 2,983	$ 2,608	$ 9,260	$ 7,771

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Carrying Value of Repurchase Agreements (Details) - Overnight and Continuous - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Securities Sold Under Agreements to Repurchase
Repurchase agreements	$ 1,040,939	$ 1,004,583
State and local governments
Securities Sold Under Agreements to Repurchase
Repurchase agreements	118,957	787,016
Corporate bonds
Securities Sold Under Agreements to Repurchase
Repurchase agreements	137,461	217,567
Residential mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Repurchase agreements	773,204	0
Commercial mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Repurchase agreements	$ 11,317	$ 0

Securities Sold Under Agreeme_4

Securities Sold Under Agreements to Repurchase - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Securities Sold Under Agreements to Repurchase
Securities pledged for repurchase agreements	$ 1,197,475	$ 1,151,264

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative financial instruments
Amount of gain (loss) recognized in OCI		$ 30	$ (76)	$ 479	$ (532)
Interest rate locks
Derivative financial instruments
Off-balance sheet commitments		179,578		179,578		$ 229,862
Interest rate locks | Other Assets
Derivative financial instruments
Fair value of derivative		3,884		3,884		8,605
Interest rate caps
Derivative financial instruments
Forecasted notional amount	$ 130,500
Derivative, term of contracts	5 years
Interest expense recorded				126	84
Interest rate caps | Other Assets
Derivative financial instruments
Fair value of derivative		553		553		201
Interest rate caps | Minimum
Derivative financial instruments
Derivative, cap interest rate	1.50%
Interest rate caps | Maximum
Derivative financial instruments
Derivative, cap interest rate	2.00%
Interest Rate Contracts
Derivative financial instruments
Amount of gain (loss) recognized in OCI		30	$ (76)	479	$ (532)
Forward commitments to sell TBA securities
Derivative financial instruments
Forecasted notional amount		154,000		154,000		206,000
Forward commitments to sell TBA securities | Other Liabilities
Derivative financial instruments
Fair value of derivative asset, gross liability		$ 759		$ 759		$ 2,056

Other Expenses (Details)

Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Expenses
Consulting and outside services	$ 3,003	$ 4,050	$ 7,918	$ 8,604
Loan expenses	1,649	1,743	5,028	3,732
Telephone	1,330	1,314	4,044	3,865
VIE amortization and other expenses	1,668	1,510	4,342	3,396
Debit card expenses	1,469	1,414	3,761	3,704
Business development	1,360	1,139	3,230	3,110
Postage	894	851	2,729	2,479
Printing and supplies	840	877	2,453	2,704
Employee expenses	953	560	2,137	2,247
Mergers and acquisition expenses	472	792	1,654	7,311
Legal fees	283	206	1,075	1,025
Checking and operating expenses	307	355	1,061	1,263
Accounting and audit fees	172	455	865	1,453
(Gain) loss on dispositions of fixed assets	(65)	0	(1,463)	125
Other	985	1,203	3,092	3,076
Total other expenses	$ 15,320	$ 16,469	$ 41,926	$ 48,094

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax
Balance, beginning	$ 2,353,955	$ 2,203,715	$ 2,307,041	$ 1,960,733
Other comprehensive income (loss) before reclassifications			(63,109)	91,630
Reclassification adjustments for gains included in net income (loss)				(758)
Total other comprehensive (loss) income, net of tax	(12,783)	1,189	(65,431)	90,872
Balance, ending	2,387,616	2,255,089	2,387,616	2,255,089
Gains (Losses) on Available-For-Sale and Transferred Debt Securities
AOCI Attributable to Parent, Net of Tax
Balance, beginning			143,443	40,226
Other comprehensive income (loss) before reclassifications			(63,468)	92,027
Reclassification adjustments for gains included in net income (loss)				(758)
Total other comprehensive (loss) income, net of tax			(65,790)	91,269
Balance, ending	77,653	131,495	77,653	131,495
(Losses) Gains on Derivatives Used for Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax
Balance, beginning			(353)	0
Other comprehensive income (loss) before reclassifications			359	(397)
Reclassification adjustments for gains included in net income (loss)				0
Total other comprehensive (loss) income, net of tax			359	(397)
Balance, ending	6	(397)	6	(397)
Reclassification adjustments for gains and transfers included in net income
AOCI Attributable to Parent, Net of Tax
Reclassification adjustments for gains included in net income (loss)			650
Reclassification adjustments for amortization included in net income for transferred securities
AOCI Attributable to Parent, Net of Tax
Reclassification adjustments for gains included in net income (loss)			1,672
Accumulated Other Compre- hensive Income (loss)
AOCI Attributable to Parent, Net of Tax
Balance, beginning	90,442	129,909	143,090	40,226
Total other comprehensive (loss) income, net of tax	(12,783)	1,189	(65,431)	90,872
Balance, ending	$ 77,659	$ 131,098	$ 77,659	$ 131,098

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic and Diluted Earnings Per Share
Net income available to common stockholders, basic	$ 75,619	$ 77,757	$ 234,048	$ 184,540
Net income available to common stockholders, diluted	$ 75,619	$ 77,757	$ 234,048	$ 184,540
Average outstanding shares - basic (in shares)	95,510,772	95,411,656	95,494,211	94,704,198
Add: dilutive restricted stock units and stock options (in shares)	75,430	30,920	79,308	43,696
Average outstanding shares - diluted (in shares)	95,586,202	95,442,576	95,573,519	94,747,894
Basic earnings per share (in dollars per share)	$ 0.79	$ 0.81	$ 2.45	$ 1.95
Diluted earnings per share (in dollars per share)	$ 0.79	$ 0.81	$ 2.45	$ 1.95
Restricted stock units and stock options excluded from the diluted average outstanding share calculation (in shares)	0	93,253	0	78,605

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Loans Held For Sale | Gain on sale of loans
Fair Value, Option, Quantitative Disclosures
Changes in fair value, (losses) gains	$ (4,565)	$ 3,435

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial Assets
Debt securities, available-for-sale	$ 7,390,580	$ 5,337,814
Recurring Measurements
Financial Assets
Loans held for sale, at fair value	94,138	166,572
Total assets measured at fair value on a recurring basis	7,489,914	5,513,192
Total financial liabilities		2,056
Interest rate caps | Recurring Measurements
Financial Assets
Interest rate caps	553	201
Interest rate locks | Recurring Measurements
Financial Assets
Interest rate caps	3,884	8,605
TBA hedge | Recurring Measurements
Financial Assets
Interest rate caps	759
TBA hedge		2,056
U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	31,373	38,588
U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	47,051	9,781
State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	508,691	1,416,683
Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	198,119	349,098
Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	5,491,345	2,289,090
Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	1,114,001	1,234,574
Level 1 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Total financial liabilities		0
Level 1 | Interest rate caps | Recurring Measurements
Financial Assets
Interest rate caps	0	0
Level 1 | Interest rate locks | Recurring Measurements
Financial Assets
Interest rate caps	0	0
Level 1 | TBA hedge | Recurring Measurements
Financial Assets
Interest rate caps	0
TBA hedge		0
Level 1 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 2 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	94,138	166,572
Total assets measured at fair value on a recurring basis	7,489,914	5,513,192
Total financial liabilities		2,056
Level 2 | Interest rate caps | Recurring Measurements
Financial Assets
Interest rate caps	553	201
Level 2 | Interest rate locks | Recurring Measurements
Financial Assets
Interest rate caps	3,884	8,605
Level 2 | TBA hedge | Recurring Measurements
Financial Assets
Interest rate caps	759
TBA hedge		2,056
Level 2 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	31,373	38,588
Level 2 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	47,051	9,781
Level 2 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	508,691	1,416,683
Level 2 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	198,119	349,098
Level 2 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	5,491,345	2,289,090
Level 2 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	1,114,001	1,234,574
Level 3 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Total financial liabilities		0
Level 3 | Interest rate caps | Recurring Measurements
Financial Assets
Interest rate caps	0	0
Level 3 | Interest rate locks | Recurring Measurements
Financial Assets
Interest rate caps	0	0
Level 3 | TBA hedge | Recurring Measurements
Financial Assets
Interest rate caps	0
TBA hedge		0
Level 3 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	$ 0	$ 0

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Fair Value Measurements on a Non-Recurring Basis (Details) - Non-Recurring Measurements - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned		$ 564
Collateral-dependent impaired loans, net of ACL	$ 28,651	26,749
Total assets measured at fair value on a recurring basis		27,313
Level 1
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned		0
Collateral-dependent impaired loans, net of ACL	0	0
Total assets measured at fair value on a recurring basis		0
Level 2
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned		0
Collateral-dependent impaired loans, net of ACL	0	0
Total assets measured at fair value on a recurring basis		0
Level 3
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned		564
Collateral-dependent impaired loans, net of ACL	$ 28,651	26,749
Total assets measured at fair value on a recurring basis		$ 27,313

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities - Quantitative Information about Level 3 Fair Value Measurements (Details) - Non-Recurring Measurements $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		$ 564
Collateral-dependent impaired loans, net of ACL	$ 28,651	26,749
Level 3
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		564
Collateral-dependent impaired loans, net of ACL	28,651	26,749
Level 3 | Sales Comparison Approach
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		564
Level 3 | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	7,561	25,309
Level 3 | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	$ 21,090	144
Level 3 | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		$ 1,296
Level 3 | Minimum | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		0.080
Collateral-dependent impaired loans, net of ACL	0.050	0.100
Level 3 | Minimum | Sales Comparison Approach | Adjustments to comparables
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.050	0
Level 3 | Minimum | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.100	0.100
Level 3 | Minimum | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.100
Level 3 | Minimum | Combined Approach | Measurement Input, Discount Rate
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.080
Level 3 | Maximum | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		0.100
Collateral-dependent impaired loans, net of ACL	0.100	0.100
Level 3 | Maximum | Sales Comparison Approach | Adjustments to comparables
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.100	1
Level 3 | Maximum | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.100	0.100
Level 3 | Maximum | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.100
Level 3 | Maximum | Combined Approach | Measurement Input, Discount Rate
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.080
Level 3 | Weighted Average Range | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned		0.090
Collateral-dependent impaired loans, net of ACL	0.051	0.001
Level 3 | Weighted Average Range | Sales Comparison Approach | Adjustments to comparables
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.055	0.111
Level 3 | Weighted Average Range | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL	0.100	0.100
Level 3 | Weighted Average Range | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.100
Level 3 | Weighted Average Range | Combined Approach | Measurement Input, Discount Rate
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ACL		0.080

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities - Carrying Amount and Estimated Fair Value of Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Carrying Amount
Financial assets
Cash and cash equivalents	$ 348,888	$ 633,142
Debt securities, held-to-maturity	1,128,299	189,836
Loans receivable, net of ACL	11,140,282	10,964,453
Total financial assets	12,617,469	11,787,431
Financial liabilities
Term deposits	919,852	978,779
Repurchase agreements and other borrowed funds	1,074,610	1,037,651
Subordinated debentures	132,580	139,959
Total financial liabilities	2,127,042	2,156,389
Estimated Fair Value | Level 1
Financial assets
Cash and cash equivalents	348,888	633,142
Debt securities, held-to-maturity	0	0
Loans receivable, net of ACL	0	0
Total financial assets	348,888	633,142
Financial liabilities
Term deposits	0	0
Repurchase agreements and other borrowed funds	0	0
Subordinated debentures	0	0
Total financial liabilities	0	0
Estimated Fair Value | Level 2
Financial assets
Cash and cash equivalents	0	0
Debt securities, held-to-maturity	1,146,453	203,216
Loans receivable, net of ACL	0	0
Total financial assets	1,146,453	203,216
Financial liabilities
Term deposits	922,810	983,491
Repurchase agreements and other borrowed funds	1,074,610	1,037,651
Subordinated debentures	130,081	123,944
Total financial liabilities	2,127,501	2,145,086
Estimated Fair Value | Level 3
Financial assets
Cash and cash equivalents	0	0
Debt securities, held-to-maturity	0	0
Loans receivable, net of ACL	11,352,711	11,233,002
Total financial assets	11,352,711	11,233,002
Financial liabilities
Term deposits	0	0
Repurchase agreements and other borrowed funds	0	0
Subordinated debentures	0	0
Total financial liabilities	$ 0	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - Altabancorp $ in Thousands	Oct. 01, 2021USD ($)shares
Subsequent Event
Percentage of outstanding common stock acquired	100.00%
Business combination, assets acquired	$ 3,647,728
Business combination, acquired loans receivable	1,901,181
Business combination, acquired deposits	3,278,907
Value of acquisition	$ 839,852
Number of shares issued for acquisition (in shares) | shares	15,173,480