Northwest Bancshares (NWBI) 10-K 26 Feb 21 2020 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 22, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-34582
Entity Registrant Name	NORTHWEST BANCSHARES, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	27-0950358
Entity Address, Address Line One	100 Liberty Street,
Entity Address, City or Town	Warren,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	16365
City Area Code	814
Local Phone Number	726-2140
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	NWBI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		126,949,388
Entity Public Float			$ 1,308
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Proxy Statement for the 2021 Annual Meeting of Stockholders of the Registrant (Part III).
Entity Central Index Key	0001471265
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 736,277	$ 60,846
Marketable securities available-for-sale (amortized cost of $1,375,685 and $815,495, respectively)	1,398,941	819,901
Marketable securities held-to-maturity (fair value of $179,666 and $18,223, respectively)	178,887	18,036
Total cash and cash equivalents and marketable securities	2,314,105	898,783
Loans held-for-sale	58,786	7,709
Loans held for investment	10,522,063	8,800,965
Allowance for credit losses	(134,427)	(57,941)
Loans receivable, net	10,446,422	8,750,733
FHLB stock, at cost	21,748	14,740
Accrued interest receivable	35,554	25,755
Real estate owned, net	2,232	950
Premises and equipment, net	161,538	147,409
Bank-owned life insurance	253,951	189,091
Goodwill	382,279	346,103
Other intangible assets, net	19,936	23,076
Other assets	168,503	97,268
Total assets	13,806,268	10,493,908
Liabilities:
Deposits	11,599,233	8,592,007
Borrowed funds	283,044	246,336
Junior subordinated debentures	128,794	121,800
Advances by borrowers for taxes and insurance	45,230	44,556
Accrued interest payable	2,054	1,142
Other liabilities	209,210	134,782
Total liabilities	12,267,565	9,140,623
Shareholders’ equity:
Preferred stock, $0.01 par value: 50,000,000 authorized, no shares issued	0	0
Common stock, $0.01 par value: 500,000,000 shares authorized, 127,019,452 and 106,859,088 shares issued and outstanding, respectively	1,270	1,069
Additional paid-in capital	1,015,502	805,750
Retained earnings	555,480	583,407
Accumulated other comprehensive loss	(33,549)	(36,941)
Total shareholders’ equity	1,538,703	1,353,285
Total liabilities and shareholders’ equity	$ 13,806,268	$ 10,493,908

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Marketable securities available-for-sale, amortized cost	$ 1,375,685	$ 815,495
Investment securities held-to-maturity, fair value	$ 179,666	$ 18,223
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	127,019,452	106,859,088
Common stock, shares outstanding (in shares)	127,019,452	106,859,088

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans receivable	$ 410,907	$ 394,809	$ 356,571
Mortgage-backed securities	17,416	16,670	13,781
Taxable investment securities	1,985	3,401	3,064
Tax-free investment securities	2,060	844	1,078
FHLB stock dividends	981	1,056	452
Interest-earning deposits	719	600	835
Total interest income	434,068	417,380	375,781
Interest expense:
Deposits	35,896	49,216	30,985
Borrowed funds	6,444	7,698	6,155
Total interest expense	42,340	56,914	37,140
Net interest income	391,728	360,466	338,641
Provision for credit losses	83,975	22,659	20,332
Net interest income after provision for credit losses	307,753	337,807	318,309
Noninterest income:
Gain on sale of investments	236	50	157
Gain on sale of loans	1,302	1,734	0
Service charges and fees	55,613	53,065	50,792
Trust and other financial services income	20,922	17,765	16,581
Insurance commission income	9,132	8,068	8,791
Loss on real estate owned, net	(106)	(53)	(631)
Income from bank-owned life insurance	5,190	4,418	5,821
Mortgage banking income	31,391	3,819	596
Other operating income	8,585	10,541	9,595
Total noninterest income	132,265	99,407	91,702
Noninterest expense:
Compensation and employee benefits	178,375	163,086	152,395
Premises and occupancy costs	30,622	28,717	27,519
Office operations	15,728	14,133	14,139
Collections expense	3,275	2,560	2,209
Processing expenses	50,050	42,453	39,046
Marketing expenses	7,695	6,998	8,434
Federal deposit insurance premiums	4,767	685	2,746
Professional services	12,482	12,287	10,598
Amortization of intangible assets	6,856	6,543	5,848
Real estate owned expense	359	478	817
Acquisition/branch optimization expense	20,789	4,168	1,014
Other expenses	16,494	13,995	11,333
Total noninterest expense	347,492	296,103	276,098
Income before income taxes	92,526	141,111	133,913
Provision for income taxes:
Federal	14,896	24,069	21,948
State	2,776	6,610	6,474
Total provision for income taxes	17,672	30,679	28,422
Net income	$ 74,854	$ 110,432	$ 105,491
Basic earnings per share (in dollars per share)	$ 0.62	$ 1.05	$ 1.03
Diluted earnings per share (in dollars per share)	$ 0.62	$ 1.04	$ 1.02

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 74,854	$ 110,432	$ 105,491
Net unrealized holding gains/losses on marketable securities:
Unrealized holding gains/(losses), net of tax of $(5,607), $(3,990), and $513, respectively	13,711	9,984	(1,277)
Reclassification adjustment for gains included in net income, net of tax of $6, $2, and $60, respectively	(15)	(5)	(155)
Net unrealized holding gains/(losses) on marketable securities	13,696	9,979	(1,432)
Change in fair value of interest rate swaps
Unrealized holding losses on interest rate swaps, net of tax of $209, $0, and $0, respectively	(946)	0	0
Reclassification adjustment for losses included in net income, net of tax of $(209), $0, and $(223), respectively	946	0	840
Net change in fair value of interest rate swaps	0	0	840
Defined benefit plans:
Net loss, net of tax $4,169, $3,193, $770, respectively	(11,301)	(8,059)	(1,181)
Reclassification adjustments for prior period service costs and net losses included in net income, net of tax of $(395), $(334), and $(746), respectively	997	835	903
Net loss on defined benefit plans	(10,304)	(7,224)	(278)
Other comprehensive income/(loss)	3,392	2,755	(870)
Total comprehensive income	$ 78,246	$ 113,187	$ 104,621

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Income tax (expense) benefit related to unrealized holding gains/ losses on securities	$ (5,607)	$ (3,990)	$ 513
Income tax (expense) benefit related to (gain) loss on securities	6	2	60
Unrealized holding losses on interest rate swaps, tax	(209)	0	0
Reclassification adjustment for losses included in net income, tax	(209)	0	(223)
Net loss, tax	4,169	3,193	770
Reclassification adjustments for prior period service costs and net losses included in net income, tax	$ (395)	$ (334)	$ (746)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common  stock	Additional paid-in capital	Retained earnings	Retained earningsCumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income/(loss)	Accumulated other comprehensive income/(loss)Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of the period at Dec. 31, 2017	$ 1,207,724	$ 0	$ 1,027	$ 730,719	$ 508,058	$ 6,746	$ (32,080)	$ (6,746)
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Comprehensive income:
Net income	$ 105,491				105,491
Other comprehensive (loss) income net of tax	(870)						(870)
Total comprehensive income	104,621				112,237		(7,616)
Exercise of stock options	8,191		8	8,183
Stock-based compensation expense	7,023		4	7,019
Stock-based compensation forfeited	0		(5)	5
Dividends paid	(69,921)				(69,921)
Balance at end of the period at Dec. 31, 2018	$ 1,257,638	(1,226)	1,034	745,926	550,374	(1,226)	(39,696)
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Comprehensive income:
Net income	$ 110,432				110,432
Other comprehensive (loss) income net of tax	2,755						2,755
Total comprehensive income	113,187				110,432		2,755
Acquisition of Mutual Bank	43,288		24	43,264
Exercise of stock options	9,727		9	9,718
Stock-based compensation expense	6,845		3	6,842
Stock-based compensation forfeited	(1)		(1)
Dividends paid	(76,173)				(76,173)
Balance at end of the period at Dec. 31, 2019	1,353,285	$ (9,649)	1,069	805,750	583,407	$ (9,649)	(36,941)
Comprehensive income:
Net income	74,854				74,854
Other comprehensive (loss) income net of tax	3,392						3,392
Total comprehensive income	78,246				74,854		3,392
Acquisition of Mutual Bank	213,406		206	213,200
Exercise of stock options	1,479		1	1,478
Share repurchases	(9,276)		(7)	(9,269)
Stock-based compensation expense	4,239		3	4,236
Stock-based compensation forfeited	0		(2)	2
Other	105			105
Dividends paid	(93,132)				(93,132)
Balance at end of the period at Dec. 31, 2020	$ 1,538,703		$ 1,270	$ 1,015,502	$ 555,480		$ (33,549)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax	$ (1,287)	$ (1,129)	$ 374
Dividends paid, per share (in dollars per share)	$ 0.76	$ 0.72	$ 0.68

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income	$ 74,854	$ 110,432	$ 105,491
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	83,975	22,659	20,332
Net (gain)/loss on sale of assets	(3,249)	(2,472)	1,677
Mortgage banking activity	(25,798)	0	0
Net depreciation, amortization and accretion	4,738	3,824	8,120
Increase in other assets	(16,097)	(66,080)	(6,428)
Increase/(decrease) in other liabilities	47,018	53,998	(1,129)
Net amortization on marketable securities	3,797	922	1,871
Noncash compensation expense related to stock benefit plans	4,239	6,845	7,023
Noncash write-down of real estate owned	321	607	1,518
Deferred income tax (benefit)/expense	(8,084)	2,776	(2,770)
Origination of loans held-for-sale	(729,939)	(68,400)	(1,297)
Proceeds from sale of loans held-for-sale	704,660	62,351	4,501
Net cash provided by operating activities	140,435	127,462	138,909
Investing activities:
Purchase of marketable securities held-to-maturity	(164,629)	0	0
Purchase of marketable securities available-for-sale	(830,487)	(200,204)	(228,180)
Proceeds from maturities and principal reductions of marketable securities held-to-maturity	3,760	4,707	6,892
Proceeds from maturities and principal reductions of marketable securities available-for-sale	392,511	241,079	210,362
Proceeds from sale of marketable securities available-for-sale	1,096	32,389	5,206
Proceeds of bank-owned life insurance	596	2,638	2,730
Loan originations	(4,655,969)	(3,721,001)	(3,002,810)
Proceeds from loan maturities and principal reductions	4,383,933	3,275,400	2,726,103
Proceeds from sale of loans held for investment	50,791	97,923	0
Net proceeds/(redemptions) of FHLB stock	6,107	1,348	(3,902)
Proceeds from sale of real estate owned	1,651	4,198	6,312
Sale of real estate owned for investment, net	607	608	607
Purchases of premises and equipment	(12,254)	(10,899)	(5,233)
Acquisitions, net of cash received	261,712	(28,779)	0
Net cash provided used in investing activities	(560,575)	(300,593)	(281,913)
Financing activities:
Net increase in deposits	1,390,187	218,449	67,190
Proceeds from long-term borrowings	123,211	0	0
Repayments of long-term borrowings	(206,908)	0	0
Net increase/(decrease) in short-term borrowings	(108,675)	11,947	126,151
Increase/(decrease) in advances by borrowers for taxes and insurance	(1,315)	1,238	2,473
Cash dividends paid on common stock	(93,132)	(76,173)	(69,921)
Proceeds from stock options exercised	1,479	9,727	8,190
Repurchase of Northwest stock	(9,276)	0	0
Net cash provided by financing activities	1,095,571	165,188	134,083
Net increase/(decrease) in cash and cash equivalents	675,431	(7,943)	(8,921)
Cash and cash equivalents at beginning of period	60,846	68,789	77,710
Cash and cash equivalents at end of period	736,277	60,846	68,789
Cash paid during the period for:
Interest on deposits and borrowings (including interest credited to deposit accounts of $34,313, $44,928, and $29,330, respectively)	41,428	54,277	36,856
Income taxes	29,767	29,283	25,849
Business acquisitions:
Fair value of assets acquired	2,090,599	584,253	0
Northwest Bancshares, Inc. common stock issued	(213,406)	(43,288)	0
Net cash paid	0	(45,600)	0
Liabilities assumed	1,877,193	495,365	0
Noncash activities:
Loan foreclosures and repossessions	5,643	5,815	7,181
Sale of real estate owned financed by the Company	$ 126	$ 44	$ 296

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Interest on deposits and borrowings, interest credited to deposit accounts	$ 34,313	$ 44,928	$ 29,330

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Nature of Operations Northwest Bancshares, Inc., a Maryland corporation headquartered in Warren, Pennsylvania, is the federal savings and loan holding company for its wholly owned subsidiary, Northwest Bank. Northwest Bank, a Pennsylvania chartered savings bank, offers personal and business deposit and loan products as well as investment management and insurance services through its 170 banking locations in Pennsylvania, New York, Ohio, and Indiana. We have determined that we have one reportable business segment. (b) Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries after elimination of all intercompany accounts and transactions. (c) Cash and Cash Equivalents For purposes of the statements of financial condition and cash flows, cash and cash equivalents include cash and amounts due from banks, interest-bearing deposits in other financial institutions, federal funds sold, and other short-term investments with original maturities of three months or less. (d) Marketable Securities We classify marketable securities at the time of purchase as held-to-maturity, available-for-sale, or trading. Securities for which management has the intent and ability to hold until maturity are classified as held-to-maturity and are carried at cost, adjusted for amortization of premiums and accretion of discounts on a level yield basis (amortized cost). If it is management’s intent at the time of purchase to hold securities for an indefinite period of time and/or to use such securities as part of its asset/liability management strategy, the securities are classified as available-for-sale and are carried at fair value, with unrealized gains and losses reported as accumulated other comprehensive income/(loss), a separate component of shareholders’ equity, net of tax. Securities classified as available-for-sale include securities that may be sold in response to changes in interest rates, resultant prepayment risk, or other market factors. Securities that are bought and held principally for the purpose of selling them in the near term are classified as trading and are reported at fair value, with changes in fair value included in earnings. The cost of securities sold is determined on a specific identification basis. We held no securities classified as trading at or during the years ended December 31, 2020 and 2019. On a quarterly basis, we measure expected credit losses on held-to-maturity debt securities on a collective basis by major security type and all of our held-to-maturity debt securities are residential mortgage-backed securities. Accrued interest receivable on held-to-maturity debt securities totaled $1.8 million and $1.5 million at December 31, 2020 and December 31, 2019, respectively, and is excluded from estimated credit losses. All of our residential mortgage-backed securities are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. For available-for-sale debt securities in an unrealized loss position, on at least a quarterly basis, we review our investments for impairment. An investment security is deemed impaired if the fair value of the investment is less than its amortized cost. We consider both our intent to sell and the likelihood that we will not have to sell the investment securities before recovery of their amortized cost basis during our evaluation. If we intend to sell the investment security or if it is more likely than not that we will be required to sell the investment security, the entire impairment is recorded in earnings. For available-for-sale debt securities that do not meet this criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment we consider the issuer of the securities and their creditworthiness, any changes to the rating of the security and any adverse conditions specifically related to the security, among other factors. Also, we may evaluate the business and financial outlook of the issuer, as well as broader economic performance indicators. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security is compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the allowance when we believe the uncollectibility of an available-for-sale security is confirmed or when there is an intent or requirement to sell the security. Accrued interest receivable on available-for-sale debt securities totaled $1.9 million and $900,000 at December 31, 2020 and December 31, 2019, respectively, and is excluded from the estimate of credit losses. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days past due. The receivable for interest income that is accrued but not collected is reversed against interest income when the debt security is placed on nonaccrual status. (e) Loans Receivable Our portfolio segments are based on the class of financing receivable. Additionally, the class of financing receivables are based on several factors including the method for monitoring and assessing credit risk and the risk characteristics of the financing receivables. Based on evaluation of the nature of our financing receivables, along with the nature and extent of exposure to credit risk arising from these receivables, our portfolio segments were determined to be Personal Banking and Business Banking loans. • Personal Banking loans consist of the following classes of financing receivables: ◦ Residential mortgage loans - fixed and adjustable rate mortgage loans ◦ Home equity loans - first and second mortgage loans and home equity lines of credit ◦ Vehicle loans - direct and indirect automobile and motorcycle loans ◦ Consumer loans - unsecured lines of credit, credit card loans, and other consumer loans • Business Banking loans consist of the following classes of financing receivables: ◦ Commercial real estate - multi-family commercial real estate loans are secured by multi-family residences, such as rental properties and loans secured by nonresidential properties such as hotels, commercial offices, medical buildings, manufacturing facilities and retail establishments, excluding owner-occupied loans, and including small business commercial real estate loans ◦ Commercial real estate - owner-occupied loans - commercial real estate loans secured by residential or non-residential properties ◦ Commercial loans - other commercial loans, including small business commercial loans Loans are reported at amortized cost. Amortized cost is the principal balance outstanding, net of any deferred purchased premiums and discounts, deferred origination fees or costs and the allowance for credit losses. Accrued interest receivable totaled $31.7 million and $23.3 million at December 31, 2020 and December 31, 2019, respectively, and was reported in accrued interest receivable on the Consolidated Statements of Financial Position. Accrued interest receivable is excluded from the amortized cost basis of loans and from the estimate of allowance for credit losses, except for loans that received six-month deferrals as a result of COVID-19. Accrued interest receivable on loans that received six-month deferrals was $4.4 million at December 31, 2020 . Interest income on loans is credited to income as earned. Interest earned on loans for which no payments were received during the month is accrued at month end. Accrued interest on loans more than 90 days delinquent is reversed and such loans are placed on nonaccrual status. All loans are placed on nonaccrual status when principal or interest is 90 days or more delinquent or when there is reasonable doubt that interest or principal will not be collected in accordance with the contractual terms. Interest receipts on all nonaccrual loans are recognized as interest income when it has been determined that all principal and interest will be collected or are applied to principal when collectability of contractual principal is in doubt. Nonaccrual loans generally are restored to an accrual basis when principal and interest become current and a period of performance has been established in accordance with the contractual terms, typically six months. A loan is considered to be a troubled debt restructuring loan ("TDR") when the borrower is experiencing financial difficulties and the restructuring constitutes a concession. TDRs may include modifications of terms of loans, receipts of assets from borrowers in partial or full satisfaction of loans, or a combination thereof. A modified loan is determined to be a TDR based on the contractual terms as specified by the original loan agreement or the most recent modification. Once classified as a TDR, a loan is removed from such classification under three circumstances: (1) the loan is paid off, (2) the loan is charged off, or (3) if, at the beginning of the current fiscal year, the loan has performed in accordance with the modified terms for a minimum of six consecutive months and at the time of modification the loan’s interest rate represented a then current market interest rate for a loan of similar risk. Loan delinquency is measured based on the number of days since the payment due date. Past due status is measured using the loan’s contractual maturity date. Personal Banking loans are charged-off or charged down when they become 180 days delinquent, unless the borrower has filed for bankruptcy. Business Banking loans are charged-off or charged down when, in our opinion, they are no longer collectible or when it has been determined that the collateral value no longer supports the carrying value of the loan for loans that are collateral dependent. Loan fees and certain direct loan origination costs are deferred and the net deferred fee or cost is then recognized using the level-yield method over the contractual life of the loan as an adjustment to interest income. We identify certain residential mortgage loans which will be sold prior to maturity, as loans held-for-sale. These loans are recorded at fair value less estimated cost to sell. At December 31, 2020 and 2019, there were $58.8 million and $7.7 million of residential mortgage loans classified as held-for-sale, respectively. Acquired loans that are not considered p urchased with credit deterioration (" PCD") are initially measured at fair value with no carryover of the related allowance for credit losses. Determining the fair value of the loans involves estimating the amount and timing of principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Acquired loans may be classified as PCD loans upon acquisition if they have experienced more than insignificant credit deterioration since origination. Loans are considered to have experienced more than insignificant credit deterioration if they are greater than 30 days past due, classified special mention or worse or on nonaccrual status. An allowance for credit losses on day 1 is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The allowance is recognized on day 1 by adding it to the fair value of the loan, which is the “Day 1 amortized cost”. There is no credit loss expense recognized on PCD loans because the initial allowance is established by grossing-up the amortized cost of the PCD loan. 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 allowance for credit losses are recorded through provision expense. Upon adoption of ASC 326, we assessed our legacy loans that were previously accounted for under ASC 310-30 to determine whether they share similar risk characteristics and whether some or all of the assets should be assessed collectively with other loans that share similar risk characteristics. Upon adoption, an allowance for credit losses was determined for each loan and added to the loan's carrying amount to establish a new amortized cost basis. The difference between the unpaid principal balance of the loan and the new amortized cost is the noncredit premium or discount which will be amortized into interest income over the remaining life of the loan. Changes to the allowance for credit losses after adoption are recorded through provision expense. (f) Allowance for Credit Losses and Provision for Credit Losses The allowance for credit losses is deducted from, or added to, the loan’s amortized cost basis to present the net amount expected to be collected on our lending portfolios. We estimate the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Loans are charged off against the allowance when we believe the uncollectibility of a loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Expected credit losses are estimated over the contractual term of the loans, adjusted for prepayments. The contractual term excludes expected extensions, renewals and modifications unless we had a reasonable expectation at the reporting date that a TDR will be executed for an individual borrower or the extension or renewal option is included in the contract and is not unconditionally cancellable by the Company. Credit card receivables do not have stated maturities. In determining the estimated life of a credit card receivable, we first estimate the future cash flows expected to be received and then apply those expected future cash flows to the credit card balance. Expected credit losses for credit cards are determined by estimating the amount and timing of principal payments expected to be received as payment for the balance outstanding as of the reporting date and applying those principal payments against the balance outstanding as of the reporting period until the expected payments have been fully allocated. The allowance for credit losses is recorded for the excess of the balance outstanding as of the reporting period over the expected principal payments. The allowance for credit losses is measured on a collective ("pool") basis when similar risk characteristics exist. For the purpose of calculating portfolio-level reserves, we have grouped our loans into seven segments: residential mortgage loans, home equity loans, vehicle loans, consumer loans, commercial real estate loans, commercial real estate owner-occupied and commercial loans. The allowance for credit losses is measured at the pool level utilizing loan-level inputs wherever possible. We use a twelve-month forecasting period and revert to historical average loss rates thereafter. The reasonable and supportable forecast is based on a probability-weighted multiple economic scenario approach and obtained from a third party vendor. Reversion to the mean takes place over a twelve-month period. Our loss rate models utilize a linear reversion method. For our Probability of Default ("PD")/Loss Given Default ("LDG") models we revert the PD utilizing exponential reversion, which is an accelerated method, and the LGD utilizing a linear reversion method. Historical average loss rates are calculated using historical data beginning in 2009 through the current period. As part of the analysis as of December 31, 2020, we considered the most recent economic conditions and forecasts available which incorporated the impact of COVID-19. The ACL increased in the period largely attributable to COVID-19. Mortgage and Home Equity Loans The allowance for credit losses within the mortgage and home equity loan classes is calculated at the pool-level using a non-discounted cash flow method through a PD and LGD model developed by an external third-party. These classes are further divided into smaller pools of loans with similar risk characteristics such as: lines versus loans, fixed versus variable, senior lien position versus junior lien position, among other things. For each pool, the models project default rates, prepayment rates, and severity rates. The models accept as inputs key risk drivers such as: current balance, original credit bureau score, original loan-to-value ratio, type of collateral, location of collateral, delinquency status, loan age, among other characteristics. They also utilize macroeconomic forecasts of home price indices, unemployment rates, gross domestic product, and others. Vehicle Loans The allowance for credit losses within the vehicle loan portfolio is calculated at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. The allowance for vehicle loans utilizes a vintage analysis to project portfolio-level net charge-off rates. The class is further divided into short term versus long term loans, prime versus subprime borrowers, and origination vintage. This model uses current balance, original credit bureau score, original debt-to-income ratio, loan term, loan age, and other product characteristics as key risk drivers. The model used for vehicle loans is not natively sensitive to macroeconomic conditions. The necessary adjustments to account for current and expected macroeconomic conditions is captured via our qualitative adjustment framework. Consumer Loans The allowance for credit losses within the consumer loan portfolio is calculated at the portfolio-level using a non-discounted cash flow method through a suite of loss rate models developed internally with the assistance of an external third-party. This class of financing receivables is further divided into credit cards, unsecured lines of credit and other consumer loans. The allowance for credit losses for credit cards and unsecured lines of credit is calculated using two transition matrix models to project portfolio-level net charge-off rates. Both models use current balance and delinquency status as key risk drivers. These models are not natively sensitive to macroeconomic conditions. The necessary adjustments to account for current and expected macroeconomic conditions is captured via our qualitative adjustment framework. For other consumer loans, a regression model is used to project portfolio-level net charge-off rates. This model uses borrower information and macroeconomic forecasts as key inputs. Commercial Real Estate Loans The commercial real estate loan class is further segmented into smaller pools of loans with similar risk characteristics, commercial real estate loans and small business commercial real estate loans. The allowance for credit losses for the commercial real estate loan portfolio is calculated at the pool level using a non-discounted cash flow method through a PD/LGD model developed by an external third-party. This model projects default and severity rates. The model accepts as inputs key risk drivers such as: current balance, original loan-to-value-ratio, type of collateral, location of collateral, delinquency status, loan age, obligor financial statement information, and expected prepayment rates, among other characteristics. It also utilizes macroeconomic forecasts of commercial real estate price indices, unemployment rates, gross domestic product and others. The allowance for credit losses is calculated for commercial real estate small business loans at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. A regression model is used to project portfolio-level net charge-off rates. This model uses loan characteristics and macroeconomic forecasts as key inputs. Commercial Loans and Commercial Real Estate - Owner Occupied Loans The allowance for credit losses for the commercial loan portfolio and the commercial real estate - owner occupied loan portfolio is calculated at the pool level using a non-discounted cash flow method through a PD/LGD model developed by an external third-party. The commercial loan class is further segmented into smaller pools of loans with similar risk characteristics, commercial loans and commercial small business loans. The commercial loan portfolio and the commercial real estate owner occupied loan portfolio models project default and severity rates. The model accepts as inputs key risk drivers such as the obligor financial statement information, collateral type, the obligor’s primary industry, expected prepayment rates, among other characteristics. It also utilizes macroeconomic forecasts of unemployment rates, gross domestic product, corporate bond spreads, and others. The allowance for credit losses for commercial small business loans is calculated at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. A regression model is used to project portfolio-level net charge-off rates. This model uses loan characteristics and macroeconomic forecasts as key inputs. Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When we determine that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs. If this criteria is not met, a discounted cash flow method is used to determine the allowance for credit losses. All changes in the discounted cash flow method over time are reported in the allowance for credit losses. The allowance calculation is also supplemented with qualitative reserves that takes into consideration the current portfolio and specific risk characteristics, such as changes in underwriting standards, portfolio mix, delinquency level, or term, as well as changes in environmental conditions, among other factors, that have occurred but are not yet reflected in the quantitative model component. The allowance for credit losses on a TDR is measured using the same method as all other loans held for investment, except when the value of the concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit losses is determined by discounting the expected future cash flows at the original interest rate of the loan. For off-balance-sheet credit exposures, we estimate expected credit losses over the contractual period in which we are exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable. The liability for credit losses on off-balance-sheet credit exposures is adjusted through a provision for credit loss expense and is included within "other expenses". We estimate the liability balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. The estimate includes a consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Off-balance-sheet exposures that are not unconditionally cancellable have been identified for the home equity, commercial real estate, and commercial loan portfolios. Results for reporting periods beginning after January 1, 2020 are presented under CECL methodology while prior period amounts continue to be reported in accordance with Accounting Standards Codification (“ASC”) Topic 450, Contingencies; and specific reserves based upon ASC Topic 310, Receivables. ASC Topic 450 applies to homogeneous loan pools such as commercial loans, consumer lines of credit and residential mortgages that are not individually evaluated for impairment. ASC Topic 310 is applied to commercial and consumer loans that are individually evaluated for impairment. (g) Real Estate Owned Real estate owned is comprised of property either acquired through foreclosure or voluntarily conveyed by borrowers. These assets are recorded on the date acquired at the lower of the loan balance or fair value of the collateral, less estimated disposition costs, with the fair value being determined by an appraisal. Any initial write-down is charged to the allowance for credit losses. Subsequently, foreclosed assets are valued at the lower of the amount recorded at acquisition date or the current fair value, less estimated disposition costs. Any subsequent write-down or gains or losses realized from the disposition of such property are credited or charged to noninterest income. (h) Restricted Investment in FHLB Stock Federal law requires a member institution of the FHLB system to hold stock of its district FHLB according to a predetermined formula. FHLB stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. FHLB stock can only be purchased, redeemed and transferred at par value. Dividends are reported in interest income in the Consolidated Statements of Income. (i) Premises and Equipment Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation is accumulated on a straight-line basis over the estimated useful lives of the related assets. Estimated lives range from three (j) Goodwill Goodwill is generated from the premium paid for an acquisition and is allocated to reporting units, which are either our reportable segments or one level below. Reporting units are identified based upon analyzing each individual operating segment. A reporting unit is defined as a distinct, separately identifiable component of an operating segment for which complete, discrete financial information is available that management regularly reviews. Goodwill is not subject to amortization but is tested for impairment at least annually and possibly more frequently if certain events occur or changes in circumstances arise. In testing goodwill for impairment, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If, after assessing all events and circumstances, we determine it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test would be unnecessary. However, if we conclude otherwise, it would then be required to perform the first step of the goodwill impairment test and continue to the second step, if necessary. Step 1 requires the fair value of each reporting unit be compared to its carrying amount, including goodwill. Determining the fair value of a reporting unit requires a high degree of subjective judgment, including developing cash flow projections, selecting appropriate discount rates, identifying relevant market comparables, incorporating general economic and market conditions and selecting an appropriate control premium. Quarterly, the Company evaluates whether there are any triggering events that would require an update to our previous goodwill assessment. During the first quarter of 2020, the Company determined the COVID-19 pandemic and its negative effect on the global economy to be a triggering event. As a result, the Company, with the assistance of a third-party specialist, performed a quantitative impairment analysis in accordance with ASU 2017-04 as of March 31, 2020. This analysis indicated the aggregate fair value of Northwest Bank, the sole reporting unit of Northwest Bancshares, Inc., exceeded the carrying value and therefore goodwill was not impaired. Given the results of the quantitative goodwill analysis performed during the first quarter and the absence of any significant changes in the economic environment that would indicate a change in the conclusion of the quantitative analysis performed, the Company elected to perform a qualitative goodwill impairment test as of June 30, 2020 in accordance with ASC 350, as updated by ASU 2017-04, and concluded that goodwill was not impaired as of June 30, 2020. As of December 31, 2020, there were no events or changes in circumstances that would cause us to update that goodwill impairment test and we have concluded goodwill is not impaired as of December 31, 2020 and 2019. (k) Core Deposit and Other Identifiable Intangibles Through the assistance of an independent third party, we analyze and prepare a core deposit study for all bank acquisitions or other identifiable intangible asset study, such as customer lists, for all non-bank acquisitions. The core deposit study reflects the cumulative present value benefit of acquiring deposits versus an alternative source of funding. The other identifiable intangible asset study reflects the cumulative present value benefit of acquiring the income stream from an existing customer base versus developing new business relationships. Based upon analysis, the amount of the premium related to the core deposits or other identifiable intangibles of the business purchased is calculated along with the estimated life of the intangible. The intangible, which is recorded in other intangible assets, is then amortized to expense on an accelerated basis over an approximate life of typically between seven (l) Bank-Owned Life Insurance We own insurance on the lives of a certain group of current and former employees and director's. The policies were purchased to help offset the increase in the costs of various benefit plans, including healthcare, as well as the directors deferred compensation plan. The cash surrender value of these policies is included as an asset on the Consolidated Statements of Financial Condition and any increases in the cash surrender value are recorded as tax-free noninterest income on the Consolidated Statements of Income. In the event of the death of an insured individual covered by these policies, after distribution to the insured’s beneficiaries, if any, we receive a tax-free death benefit, which is recorded as noninterest income. (m) Deposits Interest on deposits is accrued and charged to expense monthly and is paid or credited in accordance with the terms of the accounts. (n) Revenue Recognition Revenue that is not associated with our financial assets and financial liabilities is recognized when performance obligations under the terms of a contract with our customers are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The majority of our revenue continues to be recognized at the point in time when the services are provided to our customers. (o) Pension Plans We maintain multiple noncontributory defined benefit pension plans for substantially all of our employees. The net periodic pension cost has been calculated using service cost, interest cost, expected returns on plan assets and net amortization. The other components of the net periodic benefit cost are included in other expense on the Consolidated Statement of Income and are reported separately from the service costs. (p) Income Taxes We join with our wholly owned subsidiaries in filing a consolidated federal income tax return. In accordance with an intercompany tax allocation agreement, the applicable federal income tax expense or benefit is allocated to each subsidiary based upon taxable income or loss calculated on a separate company basis. Each subsidiary is responsible for payment of its own federa

Recently Adopted Accounting Sta

Recently Adopted Accounting Standards	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards On January 1, 2020, the Company adopted Accounting Standards Update ("ASU") 2016-13, " Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments , which eliminated the probable initial recognition threshold for credit losses and instead requires that all financial assets (or group of financial assets) measured at amortized cost be presented at the net amount expected to be collected inclusive of the entity’s current estimate of all lifetime expected credit losses. This guidance also applies to certain off-balance-sheet credit exposures such as unfunded commitments and non-derivative financial guarantees. In addition, ASC 326 made changes to the accounting for available-for-sale debt securities. ASC 326 requires credit losses to be presented as an allowance, rather than a write-down, on available-for-sale debt securities management does not intend to sell or believes that it is more likely than not they will be required to sell. We adopted ASC 326 using the modified retrospective transition approach for all financial assets measured at amortized cost and off-balance-sheet credit exposures. As a result, the Company was not required to adjust its comparative period financial information for effects of the standard or make the new required ASC 326 disclosures for periods before the date of adoption (i.e., January 1, 2020). As a result of the adoption of ASU 2016-13, or CECL, we recognized an increase to the allowance for credit losses of $10.8 million, an increase to our reserve for off-balance sheet exposures of $2.3 million, an increase in deferred tax assets of $2.9 million and a cumulative-effect adjustment to retained earnings of $9.6 million, net of taxes, on the Consolidated Statements of Financial Condition as of January 1, 2020, with no impact on our Consolidated Statement of Income or Consolidated Statement of Cash Flows. Additionally, the adoption of CECL did not materially impact our held-to-maturity or our available-for-sale securities portfolio, which are primarily comprised of agency-backed mortgage securities. We also adopted ASC 326 using the prospective transition approach for financial assets PCD that were previously classified as purchased credit impaired (PCI) and accounted for under ASC 310-30. In accordance with ASC 326, we did not reassess whether PCI assets met the criteria for PCD assets as of the date of adoption. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $517,000 of allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, 2020. We have elected to phase the estimated impact of CECL into regulatory capital in accordance with the interim final rule of the Board of Governors of the Federal Reserve System (FRB) and other U.S. banking agencies that became effective on March 31, 2020. As a result, we will delay recognizing the estimated impact of CECL on regulatory capital until after a two-year deferral period, which for us extends through December 31, 2021. Beginning on January 1, 2022, we will be required to phase in 25% of the previously deferred estimated capital impact of CECL, with an additional 25% to be phased in at the beginning of each subsequent year until fully phased in by the first quarter of 2025. Under the interim final rule, the estimated impact of CECL on regulatory capital that we will defer and later phase in is calculated as the entire day-one impact at adoption plus 25% of the subsequent change in allowance during the two-year deferral period. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This guidance removes, modifies and adds disclosure requirements for fair value measurements. On January 1, 2020, the Company adopted ASU 2018-13 on a prospective basis for the new and modified disclosures, and on a retrospective basis for disclosures that have been eliminated. The adoption of this standard did not have any effect on our results of operations or financial position. Refer to Note 17, "Disclosures About Fair Value of Financial Instruments". In August 2018, the FASB issued ASU 2018-15, “ Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” This guidance aligns the requirements for capitalization of implementation costs incurred in a hosting arrangement that is a service contract with the existing guidance for internal-use software. On January 1, 2020, the Company adopted ASU 2018-15 on a prospective basis which will be applied to relevant implementation costs incurred after the date of adoption. The adoption of this standard is not expected to have a material prospective impact on our financial statements.

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Acquisition	Acquisition On April 24, 2020, the Company completed the merger with MutualFirst Financial, Inc., the holding company for MutualBank (collectively referred to as "MutualBank"), for total consideration of $213.4 million. The transaction has expanded Northwest’s franchise by 36 offices in Indiana. The result of MutualBank's operations are included in the Consolidated Statements of Income from the date of acquisition. Under the terms of the merger agreement, each share of MutualBank's common stock was converted into 2.4 shares of the Company's common stock, or a total of 20,658,957 shares of common stock of the Company, valued at $213.4 million, based on the $10.33 per share closing price of the Company's stock on April 24, 2020 with cash in lieu of fractional shares paid at a rate of $10.71 per whole share of Northwest Bancshares, Inc. common stock. The following table shows the assets acquired and the liabilities assumed that were recorded at fair value on the date of acquisition: Consideration paid: Northwest Bancshares, Inc. common stock issued $ 213,406 Total consideration paid 213,406 Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value (1) Cash and cash equivalents $ 261,712 Investment securities available-for-sale 126,854 Loans, net 1,508,141 FHLB stock 13,115 Premises and equipment 19,094 Core deposit intangible 3,717 Other assets 121,790 Deposits (1,617,039) Borrowings (232,200) Junior subordinated debentures (6,804) Other liabilities (21,150) Total identifiable net assets $ 177,230 Goodwill $ 36,176 (1) Amounts are estimates and subject to adjustment. Actual amounts are not expected to differ materially from the amounts shown. We estimated the fair value of loans acquired from MutualBank by utilizing a methodology wherein similar loans were aggregated into pools. Cash flows for each pool were determined by estimating future credit losses and the rate of prepayments. Projected monthly cash flows were then discounted to present value based on a market rate for similar loans. There was no carryover of MutualBank’s allowance for credit losses associated with the loans we acquired as the loans were initially recorded at fair value. The fair value of loans acquired was $1.508 billion, net of a $14.7 million discount. The core deposit intangible asset recognized as part of the MutualBank merger is being amortized over its estimated useful life of seven years utilizing an accelerated method. The goodwill, which is not amortized for book purposes, was assigned to our Community Banking segment and is not deductible for tax purposes. The fair values of savings and transaction deposit accounts acquired from MutualBank were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. Certificates of deposit were valued by projecting out the expected cash flows based on the contractual terms of the certificates of deposit. These cash flows were discounted based on a market rate for a certificate of deposit with a corresponding maturity. Direct costs related to the MutualBank merger were expensed as incurred and were $12.1 million during the year ended December 31, 2020, which included technology and communications costs, professional services, marketing and advertising, and other noninterest expenses.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Leases At inception, the Company determines if an arrangement contains a lease and whether that lease meets the classification of a finance or operating lease. Operating lease right of use ("ROU") assets represent our right to use an underlying asset during the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments. ROU assets are further adjusted for lease incentives and initial direct costs. The Company has operating leases for certain branch and office facilities or land with lease terms up to 35 years. These leases generally contain renewal options for periods ranging from one Some of the Company’s lease arrangements contain lease components (e.g., minimum rent payments) and non-lease components (e.g., common area maintenance, taxes, etc.). For all leases, the Company elected the option of not separating lease and non-lease components and instead we account for them as a single lease component. Certain lease agreements include rental payments that are adjusted periodically for an index or rate. The leases are initially measured using the projected adjustment for the index or rate in effect at the commencement date. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. Generally, the Company cannot practically determine the interest rate implicit in the lease. Therefore, the Company uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. Lease expense for these leases is recognized on a straight-line basis over the lease term, with variable lease payments recognized in the period those payments are incurred. The components of lease cost recognized within our Consolidated Statements of Income were as follows: For the years ended December 31, 2020 2019 Operating lease costs (office operations) $ 6,139 5,603 Variable lease costs (office operations) 680 596 Total operating lease costs $ 6,819 6,199 Amounts reported in the Consolidated Statements of Financial Condition were as follows: For the years ended December 31, 2020 2019 Operating leases: Operating lease ROU assets (other assets) $ 48,329 49,380 Operating lease liabilities (other liabilities) 52,206 52,092 Other information related to leases as were as follows: For the years ended December 31, 2020 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 6,204 5,564 ROU assets obtained in exchange for lease obligations $ 8,657 13,268 Weighted average remaining lease term 15.1 years 15.7 years Weighted average discount rate 3.4 % 3.7 % Amounts disclosed for ROU assets obtained in exchange for lease obligations include amounts added to the carrying amount of ROU assets resulting from lease modifications and reassessments. Maturities of lease liabilities by fiscal year for our operating leases are as follows: As of December 31, 2020 2021 $ 6,079 2022 5,681 2023 5,403 2024 4,731 2025 4,521 Thereafter 41,882 Total lease payments 68,297 Less amount of lease payments representing interest 16,091 Total present value of lease payments $ 52,206 As of December 31, 2019 2020 $ 5,692 2021 5,362 2022 5,042 2023 4,734 2024 4,408 Thereafter 44,758 Total lease payments 69,996 Less amount of lease payments representing interest 17,904 Total present value of lease payments $ 52,092

Marketable Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities Marketable securities available-for-sale at December 31, 2020 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due after ten years $ 40,761 211 (55) 40,917 Debt issued by government sponsored enterprises: Due in less than one year 24,976 159 — 25,135 Due in one year through five years 238 3 — 241 Due in five years through ten years 68,973 238 (80) 69,131 Municipal securities: Due in less than one year 4,008 14 — 4,022 Due in one year through five years 2,803 63 (2) 2,864 Due in five years through ten years 16,045 429 (5) 16,469 Due after ten years 89,778 3,752 (72) 93,458 Residential mortgage-backed securities: Fixed rate pass-through 339,406 7,125 (86) 346,445 Variable rate pass-through 14,778 431 (20) 15,189 Fixed rate agency CMOs 723,586 11,758 (1,093) 734,251 Variable rate agency CMOs 50,333 519 (33) 50,819 Total residential mortgage-backed securities 1,128,103 19,833 (1,232) 1,146,704 Total marketable securities available-for-sale $ 1,375,685 24,702 (1,446) 1,398,941 Marketable securities held-to-maturity at December 31, 2020 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due in five years through ten years $ 67,990 12 (123) 67,879 Residential mortgage-backed securities: Fixed rate pass-through 1,723 131 — 1,854 Variable rate pass-through 919 30 — 949 Fixed rate agency CMOs 107,651 716 (2) 108,365 Variable rate agency CMOs 604 15 — 619 Total residential mortgage-backed securities 110,897 892 (2) 111,787 Total marketable securities held-to-maturity $ 178,887 904 (125) 179,666 Marketable securities available-for-sale at December 31, 2019 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due in less than one year $ 14,951 40 — 14,991 Debt issued by government sponsored enterprises: Due in less than one year 50,777 345 — 51,122 Due in one year through five years 50,229 — (227) 50,002 Due after ten years 3,716 53 (109) 3,660 Municipal securities: Due in less than one year 809 4 — 813 Due in one year through five years 2,891 79 — 2,970 Due in five years through ten years 10,155 148 — 10,303 Due after ten years 11,695 267 — 11,962 Corporate debt issues: Due in five years through ten years 919 — — 919 Residential mortgage-backed securities: Fixed rate pass-through 142,421 1,941 (881) 143,481 Variable rate pass-through 18,933 749 (4) 19,678 Fixed rate agency CMOs 452,256 3,518 (1,606) 454,168 Variable rate agency CMOs 55,743 207 (118) 55,832 Total residential mortgage-backed securities 669,353 6,415 (2,609) 673,159 Total marketable securities available-for-sale $ 815,495 7,351 (2,945) 819,901 Marketable securities held-to-maturity at December 31, 2019 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,197 83 — 2,280 Variable rate pass-through 1,210 28 — 1,238 Fixed rate agency CMOs 14,016 68 — 14,084 Variable rate agency CMOs 613 8 — 621 Total residential mortgage-backed securities 18,036 187 — 18,223 Total marketable securities held-to-maturity $ 18,036 187 — 18,223 The following table presents information regarding the issuers and the carrying values of our mortgage-backed securities at December 31, 2020 and 2019: December 31, 2020 2019 Residential mortgage-backed securities: FNMA $ 532,532 280,832 GNMA 367,354 231,491 FHLMC 357,249 178,375 Other (including non-agency) 466 497 Total residential mortgage-backed securities $ 1,257,601 691,195 Marketable securities having a carrying value of $160.3 million at December 31, 2020 were pledged under collateral agreements. During the year ended December 31, 2020, we sold marketable securities classified as available-for-sale for $1.1 million, with gross realized gains of $64,000 and no gross realized losses. During the year ended December 31, 2019, we sold marketable securities classified as available-for-sale for $32.4 million, with gross realized gains of $29,000 and no gross realized losses. During the year ended December 31, 2018, we sold marketable securities classified as available-for-sale for $5.2 million, with gross realized gains of $189,000 and gross realized losses of $37,000. During the years ended December 31, 2020, we did not recognize allowance for credit losses and during the years ended December 31, 2019 and 2018, we did not recognize non-cash credit related other-than-temporary-impairment in our investment portfolio. The following table shows the fair value and gross unrealized losses on investment securities, for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2020: Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ 67,809 (179) 1,923 (80) 69,732 (259) Municipal securities 4,257 (79) — — 4,257 (79) Residential mortgage-backed securities 300,767 (1,202) 5,533 (31) 306,300 (1,233) Total temporarily impaired securities $ 372,833 (1,460) 7,456 (111) 380,289 (1,571) The following table shows the fair value and gross unrealized losses on investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2019: Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ — — 52,620 (336) 52,620 (336) Residential mortgage-backed securities 173,112 (858) 109,324 (1,751) 282,436 (2,609) Total temporarily impaired securities $ 173,112 (858) 161,944 (2,087) 335,056 (2,945) The Company does not believe that the available-for-sale debt securities that were in an unrealized loss position as of December 31, 2020, which were comprised of 123 individual securities, represents a credit loss impairment. All of these securities were issued by U.S. government agencies or U.S. government-sponsored agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The unrealized losses were primarily attributable to changes in the interest rate environment and not due to the credit quality of these investment securities. The Company does not have the intent to sell these investment securities and it is likely that we will not be required to sell these securities before their anticipated recovery, which may be at maturity. All of the Company's held-to-maturity securities are issued by U.S. government-sponsored agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. Therefore, the Company did not record an allowance for credit losses for these securities as of December 31, 2020. The following table presents the credit quality for our held-to-maturity securities, based on the latest information available as of December 31, 2020. The credit ratings are sourced from nationally recognized rating agencies, including Moody's and S&P, or when credit ratings cannot be sourced from the agencies, they are presented based on asset type. All of our held-to-maturity securities were current in their payment of principal and interest as of December 31, 2020. AA+ Total Held-to-maturity securities: Debt issued by the U.S. government-sponsored agencies $ 67,990 67,990 Residential mortgage-backed securities 110,897 110,897 Total marketable securities held-to-maturity $ 178,887 178,887 For the year-ended December 31, 2019, we performed an assessment to determine whether there were any events or economic circumstances that indicated a security which had an unrealized loss was impaired other-than-temporarily. The assessment considered many factors including the severity and duration of the impairment; recent events specific to the issuer or industry; and for debt securities, external credit ratings, underlying collateral position and recent downgrades. For asset backed securities, we evaluated current characteristics of each security such as delinquency and foreclosure levels, credit enhancements and projected losses and coverage. It is possible that the underlying collateral of these securities will perform worse than current expectations, which may lead to adverse changes in cash flows on these securities and potential future losses. Events that may trigger material declines in fair values for these securities in the future would be, but are not limited to: deterioration of credit metrics, significantly higher levels of default and severity of loss on the underlying collateral, deteriorating credit enhancement and loss coverage ratios, or further illiquidity. For debt securities, credit related other-than-temporary impairment is recognized in earnings, while noncredit related other-than-temporary impairment on securities not expected to be sold, or otherwise disposed of, is recognized in other comprehensive income. We assert that we do not have the intent to sell these securities and it is more likely than not that we will not have to sell these securities before a recovery of our cost basis. For these reasons, we consider the unrealized losses to be temporary impairment losses. There are approximately 119 positions that are temporarily impaired at December 31, 2019. The aggregate carrying amount of cost-method investments, including both held-to-maturity and available-for-sale, at December 31, 2019 was $837.9 million, of which all were evaluated for impairment. As of December 31, 2019, there were no investment securities for which other-than-temporary impairment charges were recorded in earnings.

Loans Receivable

Loans Receivable	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Loans Receivable	Loans Receivable The following table shows a summary of our loans receivable at amortized cost basis at December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 December 31, 2019 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,753,593 314,528 3,068,121 2,785,189 82,938 2,868,127 Home equity loans 1,175,703 292,033 1,467,736 1,099,514 243,404 1,342,918 Vehicle loans 995,040 157,633 1,152,673 850,804 10,388 861,192 Consumer loans 288,066 67,254 355,320 238,343 25,597 263,940 Total Personal Banking 5,212,402 831,448 6,043,850 4,973,850 362,327 5,336,177 Commercial Banking: Commercial real estate loans 2,223,108 624,873 2,847,981 1,915,949 312,160 2,228,109 Commercial real estate loans - owner occupied 344,016 153,892 497,908 433,099 93,182 526,281 Commercial loans 1,019,482 171,628 1,191,110 664,159 53,948 718,107 Total Commercial Banking 3,586,606 950,393 4,536,999 3,013,207 459,290 3,472,497 Total loans receivable, gross 8,799,008 1,781,841 10,580,849 7,987,057 821,617 8,808,674 Allowance for credit losses (102,874) (31,553) (134,427) (51,439) (6,502) (57,941) Total loans receivable, net (2) $ 8,696,134 1,750,288 10,446,422 7,935,618 815,115 8,750,733 (1) Includes $58.8 million and $7.7 million of loans held-for-sale at December 31, 2020 and December 31, 2019, respectively. (2) Includes $40.9 million and $40.2 million of net unearned income, unamortized premiums and discounts and deferred fees and costs at December 31, 2020 and December 31, 2019, respectively. As of December 31, 2020, 2019, and 2018, we serviced loans for others approximating $1.516 billion, $793.1 million, and $794.2 million, respectively. These loans serviced for others are not our assets and are not included in our financial statements. As of December 31, 2020 and 2019, approximately 42% and 50%, respectively, of our loan portfolio was secured by properties located in Pennsylvania. We do not believe we have significant concentrations of credit risk to any one group of borrowers given our underwriting and collateral requirements. Loans receivable as of December 31, 2020 and 2019 include $3.690 billion and $3.090 billion, respectively, of adjustable rate loans and $6.840 billion and $5.948 billion, respectively, of fixed rate loans. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of December 31, 2020 Current Charge-offs Recoveries Initial ACL Cumulative effect of ASU 2016-13* Balance as of December 31, 2019 Allowance for Credit Losses Personal Banking: Residential mortgage loans $ 7,266 (3,289) (917) 362 1,095 7,441 2,574 Home equity loans 5,992 (3,357) (608) 766 216 5,786 3,189 Vehicle loans 14,825 11,416 (6,827) 1,867 235 842 7,292 Consumer loans 2,871 4,126 (5,831) 1,542 157 (2,424) 5,301 Total Personal Banking 30,954 8,896 (14,183) 4,537 1,703 11,645 18,356 Commercial Banking: Commercial real estate loans 79,381 58,483 (4,240) 1,287 5,720 2,288 15,843 Commercial real estate loans - owner occupied 10,518 2,588 (83) 27 963 1,278 5,745 Commercial loans 13,574 14,008 (16,212) 1,741 459 (4,419) 17,997 Total Commercial Banking 103,473 75,079 (20,535) 3,055 7,142 (853) 39,585 Total $ 134,427 83,975 (34,718) 7,592 8,845 10,792 57,941 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 2 2 — — — — — Home equity loans 35 5 — — — (293) 323 Consumer loans — — — — — (402) 402 Total Personal Banking 37 7 — — — (695) 725 Commercial Banking: Commercial real estate loans 3,449 1,438 — — — 1,934 77 Commercial real estate loans - owner occupied 326 235 — — — 88 3 Commercial loans 2,551 1,459 — — — 923 169 Total Commercial Banking 6,326 3,132 — — — 2,945 249 Total off-balance-sheet exposure $ 6,363 3,139 — — — 2,250 974 * Includes the impact of the initial allowance on PCD loans of $517,000. During the year ended December 31, 2020, we sold $50.0 million of loans that were classified as held-for-investment, for a gain of $1.3 million, which is reported in gain on sale of loans on the Consolidated Statements of Income. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of December 31, 2019 Current Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 2,463 (1,089) (935) 433 4,054 Home equity loans 2,830 46 (619) 219 3,184 Consumer loans 12,055 10,025 (11,537) 2,487 11,080 Total Personal Banking 17,348 8,982 (13,091) 3,139 18,318 Commercial Banking: Commercial real estate loans 17,292 (5,241) (5,078) 1,232 26,379 Commercial loans 16,799 12,449 (3,237) 533 7,054 Total Commercial Banking 34,091 7,208 (8,315) 1,765 33,433 Total originated loans 51,439 16,190 (21,406) 4,904 51,751 Acquired loans Personal Banking: Residential mortgage loans 111 184 (231) 75 83 Home equity loans 359 322 (502) 191 348 Consumer loans 538 156 (270) 233 419 Total Personal Banking 1,008 662 (1,003) 499 850 Commercial Banking: Commercial real estate loans 4,296 2,092 (389) 597 1,996 Commercial loans 1,198 3,715 (3,414) 280 617 Total Commercial Banking 5,494 5,807 (3,803) 877 2,613 Total acquired loans 6,502 6,469 (4,806) 1,376 3,463 Total $ 57,941 22,659 (26,212) 6,280 55,214 The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2018, prior to the adoption of ASU 2016-13 (in thousands): Balance as of December 31, 2018 Current Charge-offs Recoveries Balance as of December 31, 2017 Originated loans Personal Banking: Residential mortgage loans $ 4,054 808 (1,067) 489 3,824 Home equity loans 3,184 (25) (1,183) 320 4,072 Consumer loans 11,080 10,869 (15,674) 3,442 12,443 Total Personal Banking 18,318 11,652 (17,924) 4,251 20,339 Commercial Banking: Commercial real estate loans 26,379 11,349 (6,096) 1,215 19,911 Commercial loans 7,054 (2,062) (2,675) 1,469 10,322 Total Commercial Banking 33,433 9,287 (8,771) 2,684 30,233 Total originated loans 51,751 20,939 (26,695) 6,935 50,572 Acquired loans Personal Banking: Residential mortgage loans 83 (61) (112) 125 131 Home equity loans 348 (23) (602) 211 762 Consumer loans 419 (335) (291) 155 890 Total Personal Banking 850 (419) (1,005) 491 1,783 Commercial Banking: Commercial real estate loans 1,996 (467) (1,291) 205 3,549 Commercial loans 617 279 (650) 97 891 Total Commercial Banking 2,613 (188) (1,941) 302 4,440 Total acquired loans 3,463 (607) (2,946) 793 6,223 Total $ 55,214 20,332 (29,641) 7,728 56,795 The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2020 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 3,068,121 7,266 15,924 — 8,431 560 — Home equity loans 1,467,736 5,992 9,123 — 2,058 381 26 Vehicle loans 1,152,673 14,825 5,533 1 — — — Consumer loans 355,320 2,871 1,031 584 1 — — Total Personal Banking 6,043,850 30,954 31,611 585 10,490 941 26 Commercial Banking: Commercial real estate loans 2,847,981 79,381 44,092 — 18,430 787 471 Commercial real estate loans - owner occupied 497,908 10,518 3,642 — 761 123 — Commercial loans 1,191,110 13,574 23,487 — 2,454 165 362 Total Commercial Banking 4,536,999 103,473 71,221 — 21,645 1,075 833 Total $ 10,580,849 134,427 102,832 585 32,135 2,016 859 (1) Includes $10.7 million of nonaccrual TDRs. The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 2,868,127 2,574 14,476 — 7,550 560 — Home equity loans 1,342,918 3,189 6,745 32 1,973 393 26 Consumer loans 1,125,132 12,593 4,226 — — — — Total Personal Banking 5,336,177 18,356 25,447 32 9,523 953 26 Commercial Banking: Commercial real estate loans 2,754,390 21,588 34,864 — 19,358 1,384 476 Commercial loans 718,107 17,997 8,559 — 3,118 665 64 Total Commercial Banking 3,472,497 39,585 43,423 — 22,476 2,049 540 Total $ 8,808,674 57,941 68,870 32 31,999 3,002 566 (1) Includes $9.0 million of nonaccrual TDRs. Following the adoption of CECL as of January 1, 2020, the definitions of impairment and related impaired loan disclosures were removed. Under CECL, we present the amortized cost of our loans on nonaccrual status including such loans with no allowance. The following table presents the amortized cost of our loans on nonaccrual status as of the beginning and end of the year ended December 31, 2020 (in thousands): Nonaccrual Nonaccrual loans at December 31, 2020 with an allowance Nonaccrual Loans 90 days Personal Banking: Residential mortgage loans $ 14,476 15,923 — — Home equity loans 6,745 8,872 252 — Vehicle loans 3,147 5,377 156 1 Consumer loans 1,079 1,030 1 584 Total Personal Banking 25,447 31,202 409 585 Commercial Banking: Commercial real estate loans 18,832 27,079 17,013 — Commercial real estate loans - owner occupied 16,032 3,642 — — Commercial loans 8,559 18,069 5,418 — Total Commercial Banking 43,423 48,790 22,431 — Total $ 68,870 79,992 22,840 585 During the year ended December 31, 2020, we recognized $842,000 of interest income on nonaccrual and troubled debt restructuring loans. The following table presents the amortized cost basis of collateral-dependent loans by class of loans as of December 31, 2020 (in thousands): Real estate Equipment Other Total Personal Banking: Residential mortgage loans $ 1,269 — — 1,269 Home equity loans 99 — — 99 Total Personal Banking 1,368 — — 1,368 Commercial Banking: Commercial real estate loans 79,392 1,997 1,703 83,092 Commercial loans 3,313 197 11,069 14,579 Total Commercial Banking 82,705 2,194 12,772 97,671 Total $ 84,073 2,194 12,772 99,039 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Nonaccrual Nonaccrual Loans less TDRs less Total Average Interest Personal Banking: Residential mortgage loans $ 12,682 1,794 — 6,817 21,293 19,767 688 Home equity loans 5,635 1,110 — 1,654 8,399 8,571 368 Consumer loans 3,610 616 — — 4,226 3,842 179 Total Personal Banking 21,927 3,520 — 8,471 33,918 32,180 1,235 Commercial Banking: Commercial real estate loans 25,014 9,850 933 10,329 46,126 46,284 1,490 Commercial loans 4,739 3,820 15,916 1,474 25,949 10,179 345 Total Commercial Banking 29,753 13,670 16,849 11,803 72,075 56,463 1,835 Total $ 51,680 17,190 16,849 20,274 105,993 88,643 3,070 The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2019 prior to the adoption of ASU 2016-13 (in thousands): Loans collectively evaluated for impairment Loans individually evaluated for impairment Loans individually evaluated for impairment for which there is a related impairment reserve Related Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,860,026 8,101 8,101 560 — Home equity loans 1,340,944 1,974 1,974 393 — Consumer loans 1,125,123 9 9 3 — Total Personal Banking 5,326,093 10,084 10,084 956 — Commercial Banking: Commercial real estate loans 2,718,855 35,535 29,578 2,679 5,957 Commercial loans 694,424 23,683 18,337 8,127 5,346 Total Commercial Banking 3,413,279 59,218 47,915 10,806 11,303 Total $ 8,739,372 69,302 57,999 11,762 11,303 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2018, prior to the adoption of ASU 2016-13 (in thousands): Nonaccrual Nonaccrual Loans less TDRs less Total Average Interest Personal Banking: Residential mortgage loans $ 12,965 2,883 — 6,660 22,508 20,733 910 Home equity loans 5,996 1,079 — 1,818 8,893 9,075 511 Consumer loans 3,250 1,072 — — 4,322 4,016 235 Total Personal Banking 22,211 5,034 — 8,478 35,723 33,824 1,656 Commercial Banking: Commercial real estate loans 25,509 11,426 8,549 4,435 49,919 41,328 1,599 Commercial loans 3,010 5,091 2,453 2,087 12,641 9,186 507 Total Commercial Banking 28,519 16,517 11,002 6,522 62,560 50,514 2,106 Total $ 50,730 21,551 11,002 15,000 98,283 84,338 3,762 The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2018 prior to the adoption of ASU 2016-13 (in thousands): Loans collectively evaluated for impairment Loans individually evaluated for impairment Loans individually evaluated for impairment for which there is a related impairment reserve Related Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,856,359 8,111 8,111 747 — Home equity loans 1,256,255 2,167 2,167 523 — Consumer loans 859,684 29 29 6 — Total Personal Banking 4,972,298 10,307 10,307 1,276 — Commercial Banking: Commercial real estate loans 2,436,605 35,216 31,830 6,499 3,386 Commercial loans 588,932 8,081 6,738 767 1,343 Total Commercial Banking 3,025,537 43,297 38,568 7,266 4,729 Total $ 7,997,835 53,604 48,875 8,542 4,729 Our loan portfolios include loans that have been modified in a TDR, where concessions have been granted to borrowers who have experienced financial difficulties. These concessions typically result from our loss mitigation activities and could include: extending the note’s maturity date, permitting interest only payments, reducing the interest rate to a rate lower than current market rates for new debt with similar risk, reducing the principal payment, principal forbearance or other actions. These concessions are applicable to all loan segments and classes. Certain TDRs are classified as nonperforming at the time of restructuring and may be returned to performing status after considering the borrower’s sustained repayment performance for a period of at least six months. When we modify loans in a TDR, we evaluate any possible impairment similar to other impaired loans based on the present value of expected future cash flows, discounted at the contractual interest rate of the original loan agreement, the loan’s observable market price or the current fair value of the collateral, less selling costs, for collateral dependent loans. If we determine that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premiums or discounts), impairment is recognized through an allowance estimate or a charge-off to the allowance. In periods subsequent to modification, we evaluate all TDRs, including those that have payment defaults, for possible impairment in accordance with ASC 310-10. As a result, loans modified in a TDR may have the financial effect of increasing the specific allowance associated with the loan. Loans modified in a TDR are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a TDR subsequently default, we evaluate the loan for possible further impairment. The allowance may be increased, adjustments may be made in the allocation of the allowance, partial charge-offs may be taken to further write-down the carrying value of the loan, or the loan may be charged-off completely. In March 2020 and August 2020, joint statements were issued by federal and state regulatory agencies, after consultation with the FASB, to clarify that short-term loan modifications are not TDRs if made on a good-faith basis in response to COVID-19 to borrowers who were current prior to any relief. Under this guidance, six months is provided as an example of short-term, and current is defined as less than 30 days past due at the time the modification program is implemented. The guidance also provides that these modified loans generally will not be classified as nonaccrual during the term of the modification. For borrowers who are 30 days or more past due when enrolling in a loan modification program related to the COVID-19 pandemic, we evaluate the loan modifications under our existing TDR framework, and where such a loan modification would result in a concession to a borrower experiencing financial difficulty, the loan will be accounted for as a TDR and will generally not accrue interest. The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands): For the years ended December 31, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 176 $ 31,999 195 $ 33,608 New TDRs 14 1,497 14 3,344 Re-modified TDRs 5 9,693 8 5,678 Net paydowns — (9,806) — (7,806) Charge-offs: Residential mortgage loans — — — — Home equity loans 1 (10) — — Vehicle loans — — — — Commercial real estate loans — — — — Commercial real estate loans - owner occupied — — — — Commercial loans — — 2 (235) Paid-off loans: Residential mortgage loans 2 (330) 5 (225) Home equity loans 5 (44) 9 (196) Vehicle loans — — — — Commercial real estate loans 3 (321) 12 (2,122) Commercial real estate loans - owner occupied 2 (324) — — Commercial loans 7 (219) 5 (47) Ending TDR balance: 170 $ 32,135 176 $ 31,999 Accruing TDRs $ 21,431 $ 22,956 Nonaccrual TDRs 10,704 9,043 The following tables provide information related to TDRs (including re-modified TDRs) by portfolio segment and by class of financing receivable during the periods indicated (in thousands): For the year ended December 31, 2020 Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 90 88 5 Home equity loans 2 86 79 9 Total Personal Banking 3 176 167 14 Commercial Banking: Commercial real estate loans 9 7,365 7,615 311 Commercial real estate loans - owner occupied 1 58 48 8 Commercial loans 5 2,944 408 40 Total Commercial Banking 15 10,367 8,071 359 Total 18 $ 10,543 8,238 373 For the year ended December 31, 2019 Number of Recorded Current Current Personal Banking: Residential mortgage loans 3 $ 297 297 19 Home equity loans 5 171 165 12 Total Personal Banking 8 468 462 31 Commercial Banking: Commercial real estate loans 10 8,333 7,369 613 Commercial loans 4 221 192 21 Total Commercial Banking 14 8,554 7,561 634 Total 22 $ 9,022 8,023 665 For the year ended December 31, 2018 Number of Recorded Current Current Personal Banking: Residential mortgage loans 9 $ 754 749 72 Home equity loans 17 636 610 150 Total Personal Banking 26 1,390 1,359 222 Commercial Banking: Commercial real estate loans 5 3,157 3,114 169 Commercial loans 4 339 342 69 Total Commercial Banking 9 3,496 3,456 238 Total 35 $ 4,886 4,815 460 The following table provides information as of December 31, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 88 — 88 Home equity loans 2 65 — 14 — 79 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 3 65 — 102 — 167 Commercial Banking: Commercial real estate loans 9 — — 7,335 280 7,615 Commercial real estate loans - owner occupied 1 — — 48 — 48 Commercial loans 5 — 111 217 80 408 Total Commercial Banking 15 — 111 7,600 360 8,071 Total 18 $ 65 111 7,702 360 8,238 The following table provides information as of December 31, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 3 $ — — 297 — 297 Home equity loans 5 109 — 56 — 165 Total Personal Banking 8 109 — 353 — 462 Commercial Banking: Commercial real estate loans 10 — 2,541 4,828 — 7,369 Commercial loans 4 37 — 155 — 192 Total Commercial Banking 14 37 2,541 4,983 — 7,561 Total 22 $ 146 2,541 5,336 — 8,023 The following table provides information related to re-modified trouble debt restructurings by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2020 (in thousands): Type of re-modification Number of Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 3 — — 6,652 — 6,652 Commercial real estate loans - owner occupied 1 — — 48 — 48 Commercial loans 1 — — — 80 80 Total Commercial Banking 5 — — 6,700 80 6,780 Total 5 $ — — 6,700 80 6,780 The following table provides information related to re-modified trouble debt restructurings by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2019 (in thousands): Type of modification Number of Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 7 — 219 4,448 — 4,667 Commercial loans 1 — — 38 — 38 Total Commercial Banking 8 — 219 4,486 — 4,705 Total 8 $ — 219 4,486 — 4,705 No TDRs modified within the previous twelve months of December 31, 2020 or December 31, 2019 subsequently defaulted. The following table provides information related to the amortized cost basis of loan payment delinquencies at December 31, 2020 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Personal Banking: Residential mortgage loans $ 28,797 5,083 14,489 48,369 3,019,752 3,068,121 — Home equity loans 4,763 1,656 8,441 14,860 1,452,876 1,467,736 — Vehicle loans 7,707 1,776 4,599 14,082 1,138,592 1,152,674 1 Consumer loans 2,867 966 1,459 5,292 350,027 355,319 584 Total Personal Banking 44,134 9,481 28,988 82,603 5,961,247 6,043,850 585 Commercial Banking: Commercial real estate loans 6,692 1,615 23,307 31,614 2,816,366 2,847,980 — Commercial real estate loans - owner occupied 4,231 — 1,980 6,211 491,698 497,909 — Commercial loans 6,405 864 7,325 14,594 1,176,516 1,191,110 — Total Commercial Banking 17,328 2,479 32,612 52,419 4,484,580 4,536,999 — Total loans $ 61,462 11,960 61,600 135,022 10,445,827 10,580,849 585 The following table provides information related to loan payment delinquencies at December 31, 2019 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Originated loans Personal Banking: Residential mortgage loans $ 20,447 5,572 11,080 37,099 2,748,090 2,785,189 — Home equity loans 5,119 2,096 4,573 11,788 1,087,726 1,099,514 — Consumer loans 8,969 3,198 3,467 15,634 1,073,513 1,089,147 — Total Personal Banking 34,535 10,866 19,120 64,521 4,909,329 4,973,850 — Commercial Banking: Commercial real estate loans 5,598 1,387 17,959 24,944 2,324,104 2,349,048 — Commercial loans 987 6,360 4,296 11,643 652,516 664,159 — Total Commercial Banking 6,585 7,747 22,255 36,587 2,976,620 3,013,207 — Total originated loans 41,120 18,613 41,375 101,108 7,885,949 7,987,057 — Acquired loans Personal Banking: Residential mortgage loans 2,849 121 1,695 4,665 78,273 82,938 93 Home equity loans 1,350 309 1,115 2,774 240,630 243,404 53 Consumer loans 239 104 144 487 35,498 35,985 1 Total Personal Banking 4,438 534 2,954 7,926 354,401 362,327 147 Commercial Banking: Commercial real estate loans 2,323 303 7,055 9,681 395,661 405,342 — Commercial loans 200 43 443 686 53,262 53,948 — Total Commercial Banking 2,523 346 7,498 10,367 448,923 459,290 — Total acquired loans 6,961 880 10,452 18,293 803,324 821,617 147 Total $ 48,081 19,493 51,827 119,401 8,689,273 8,808,674 147 (1) Represents acquired loans that were originally recorded at fair value upon acquisition. These loans are considered to be accruing because we can reasonably estimate future cash flows and expect to fully collect the carrying value of these loans. Therefore, we are accreting the difference between the carrying value and their expected cash flows into interest income. Credit Quality Indicators: For Commercial Banking loans we categorize loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. We analyze loans individually by classifying the loans by credit risk. Credit relationships greater than or equal to $1.0 million classified as special mention or substandard are reviewed quarterly for deterioration or improvement to determine if the loan is appropriately classified. We use the following definitions for risk ratings other than pass: Special Mention — Loans designated as special mention have specific, well-defined risk issues, which create a high level of uncertainty regarding the long-term viability of the business. Loans in this class are considered to have high-risk characteristics. A special mention loan exhibits material negative financial trends due to company-specific or systemic conditions. If these potential weaknesses are not mitigated, they threaten the borrower’s capacity to meet its debt obligations. Special mention loans still demonstrate sufficient financial flexibility to react to and positively address the root cause of the adverse financial trends without significant deviations from their current business strategy. Their potential weaknesses deserve our close attention and warrant enhanced monitoring. Substandard — Loans classified as substandard are inadequately protected by the current net worth and payment capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Doubtful — Loans classified as doubtful have all the weaknesses inherent in those classified as substandard. In addition, those weaknesses make collection or liquidation in full highly questionable and improbable. A loan classified as doubtful exhibits discernible loss potential, but a complete loss seems very unlikely. The possibility of a loss on a doubtful loan is high, but because of certain important and reasonably specific pending factors that may strengthen the loan, its classification as an estimated loss is deferred until a more exact status can be determined. Loss — Loans classified as loss are considered uncollectible and of such value that the continuance as a loan is not warranted. A loss classification does not mean that the loan has no recovery or salvage value; instead, it means that it is not practical or desirable to defer writing off all or a portion of a basically worthless loan even though partial recovery may be possible in the future. For Personal Banking loans a pass risk rating is maintained until they are greater than 90 days past due, and risk rating reclassification is based primarily on past due status of the loan. The risk rating categories can generally be described by the following groupings: Pass — Loans classified as pass are homogeneous loans that are less than 90 days past due from the required payment date at month-end. Substandard — Loans classified as substandard are homogeneous loans that are greater than 90 days past due from the required payment date at month-end, loans classified as TDRs, PCD loans, or homogenous retail loans that are greater than 180 days past due from the requirement payment date at month-end that has been written down to the value of underlying collateral, less costs to sell. Doubtful — Loans classified as doubtful are homogeneous loans that are greater than 180 days past due from the required payment date at month-end and not written down to the value of underlying collateral. These loans are generally charged-off in the month in which the 180 day period elapses. Based on the most recent analysis performed, the amortized cost basis by risk category of loans by class of loans by origination year is as follows as of December 31, 2020 (in thousands): Year to date 2019 2018 2017 2016 Prior Revolving loans Revolving loans converted to term loans Total loans Personal Banking: Residential mortgage loans Pass $ 641,963 418,057 229,477 247,426 215,893 1,289,728 — — 3,042,544 Substandard — 68 1,293 1,674 1,091 21,451 — — 25,577 Total residential mortgage loans 641,963 418,125 230,770 249,100 216,984 1,311,179 — — 3,068,121 Home equity loans Pass 273,076 193,439 94,757 87,717 81,212 219,061 465,453 40,759 1,455,474 Substandard — 210 318 281 876 5,158 3,509 1,910 12,262 Total home equity loans 273,076 193,649 95,075 87,998 82,088 224,219 468,962 42,669 1,467,736 Vehicle loans Pass 448,746 352,661 218,372 70,122 31,197 24,791 — — 1,145,889 Substandard 343 1,958 2,087 1,210 667 519 — — 6,784 Total vehicle loans 449,089 354,619 220,459 71,332 31,864 25,310 — — 1,152,673 Consumer loans Pass 128,809 83,419 35,183 17,439 7,848 11,757 66,965 1,695 353,115 Substandard 133 399 139 192 36 619 686 1 2,205 Total consumer loans 128,942 83,818 35,322 17,631 7,884 12,376 67,651 1,696 355,320 Total Personal Banking 1,493,070 1,050,211 581,626 426,061 338,820 1,573,084 536,613 44,365 6,043,850 Business Banking: Commercial real estate loans Pass 417,390 473,115 316,045 264,702 195,168 709,459 36,980 29,755 2,442,614 Special Mention 584 3,381 20,180 24,675 15,424 15,817 597 3,048 83,706 Substandard 7,426 4,007 57,694 56,991 24,056 140,147 2,240 29,100 321,661 Total commercial real estate loans 425,400 480,503 393,919 346,368 234,648 865,423 39,817 61,903 2,847,981 Commercial real estate loans - owner occupied Pass 24,895 67,162 87,497 71,626 46,760 100,081 4,422 7,648 410,091 Special Mention — 4,371 4,514 3,643 4,276 3,689 3,822 — 24,315 Substandard — 21,627 1,903 12,898 4,013 21,777 874 410 63,502 Total commercial real estate loans - owner occupied 24,895 93,160 93,914 88,167 55,049 125,547 9,118 8,058 497,908 Commercial loans Pass 479,436 99,877 50,915 51,858 58,597 49,178 286,467 16,170 1,092,498 Special Mention 5,828 2,751 5,579 4,588 162 190 16,512 5,668 41,278 Substandard 1,660 3,343 2,932 2,016 2,266 3,003 27,988 14,126 57,334 Total commercial loans 486,924 105,971 59,426 58,462 61,025 52,371 330,967 35,964 1,191,110 Total Business Banking 937,219 679,634 547,259 492,997 350,722 1,043,341 379,902 105,925 4,536,999 Total loans $ 2,430,289 1,729,845 1,128,885 919,058 689,542 2,616,425 916,515 150,290 10,580,849 For the year ended December 31, 2020, $23.1 million of revolving loans were converted to term loans. The following table sets forth information about credit quality indicators as of December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Pass Special Substandard Doubtful Loss Total loans Originated loans Personal Banking: Residential mortgage loans $ 2,776,971 — 8,218 — — 2,785,189 Home equity loans 1,093,874 — 5,640 — — 1,099,514 Consumer loans 1,084,986 — 4,161 — — 1,089,147 Total Personal Banking 4,955,831 — 18,019 — — 4,973,850 Commercial Banking: Commercial real estate loans 2,188,823 70,327 89,898 — — 2,349,048 Commercial loans 571,011 42,352 50,796 — — 664,159 Total Commercial Banking 2,759,834 112,679 140,694 — — 3,013,207 Total originated loans 7,715,665 112,679 158,713 — — 7,987,057 Acquired loans Personal Banking: Residential mortgage loans 81,611 — 1,327 — — 82,938 Home equity loans 242,237 — 1,167 — — 243,404 Consumer loans 35,746 — 239 — — 35,985 Total Personal Banking 359,594 — 2,733 — — 362,327 Commercial Banking: Commercial real estate loans 349,993 10,243 45,106 — — 405,342 Commercial loans 45,972 28 7,948 — — 53,948 Total Commercial Banking 395,965 10,271 53,054 — — 459,290 Total acquired loans 755,559 10,271 55,787 — — 821,617 Total loans $ 8,471,224 122,950 214,500 —

Accrued Interest Receivable

Accrued Interest Receivable	12 Months Ended
	Dec. 31, 2020
Interest Receivable and Other Assets [Abstract]
Accrued Interest Receivable	Accrued Interest Receivable Accrued interest receivable as of December 31, 2020 and 2019 is presented in the following table: December 31, 2020 2019 Investment securities $ 1,660 730 FHLB dividends 197 211 Mortgage-backed securities 2,031 1,508 Loans receivable 31,666 23,306 $ 35,554 25,755

FHLB Stock

FHLB Stock	12 Months Ended
	Dec. 31, 2020
Federal Home Loan Banks [Abstract]
FHLB Stock	FHLB Stock Northwest Bank is a member of the FHLB of Pittsburgh, and due to the acquisition of MutualBank during the year, we are also a member of the FHLB of Indianapolis. As a member of the FHLB of Pittsburgh, we are required to maintain an investment in the capital stock of the FHLB of Pittsburgh in accordance with their 2015 Capital Plan, at cost, in two subclasses based on the following ranges: Membership stock purchase (Subclass B-1) ranging from 0.05% to 1.0% of the member asset value as defined by the FHLB, currently at 0.10%; and Activity-based stock purchase (Subclass B-2) ranging from 2.0% to 6.0% of outstanding advances, currently at 4.0%; 0.0% to 6.0% of acquired member assets, currently at 4.0%; 0.0% to 4.0% of certain letters of credit, currently at 0.75%; and 0.0% to 6.0% of outstanding advance commitments settling more than 30 days after trade, currently at 0.0%. As a member of the FHLB of Indianapolis, we are required to maintain an investment in the capital stock of the FHLB of Indianapolis in accordance with their capital plan that became effective on September 26, 2020. This plan requires the Company to invest in two subclasses based on the following ranges: Membership stock requirements (B-1 stock) ranging from 0.01% to 0.50% of the member asset value as defined by the FHLB, currently at 0.10%; and Activity-based stock requirements (B-2 stock) ranging from 1.0% to 6.0% of advances, currently at 4.5%; 1.0% to 6.0% for lines of credit, currently at 4.5%; 0.10% to 6.0% for letters of credit, currently at 0.10%; 1.0% to 6.0% of derivative contracts, currently at 4.5%; 0.0% to 6.0% for the mandatory Mortgage Purchase Program ("MPP"), currently at 0.0%; 0.0% to 6.0% for the optional MPP, currently at 4.5%; and 1.0% to 6.0% for Community Investment Program ("CIP") advances, currently at 4.5%. Our investment in the capital stock of the FHLB of Pittsburgh at December 31, 2020 and December 31, 2019 was $8.6 million and $14.7 million, respectively. In addition, our investment of capital stock of the FHLB of Indianapolis at December 31, 2020 was $13.1 million and no holdings at December 31, 2019. We received dividends on capital stock during the years ended

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment Premises and equipment at December 31, 2020 and 2019 are summarized by major classification in the following table: December 31, 2020 2019 Land and land improvements $ 26,878 22,194 Office buildings and improvements 154,439 154,535 Furniture, fixtures and equipment 134,821 124,216 Leasehold improvements 18,845 20,770 Total, at cost 334,983 321,715 Less accumulated depreciation and amortization (173,445) (174,306) Premises and equipment, net $ 161,538 147,409 Depreciation and amortization expense for the years ended December 31, 2020, 2019 and 2018 was $11.9 million, $11.7 million and $12.1 million, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The following table provides information for intangible assets subject to amortization for the years ended December 31, 2020 and 2019: December 31, 2020 2019 Amortizable intangible assets: Core deposit intangibles - gross $ 71,182 71,183 Acquisitions 3,717 — Less: accumulated amortization (56,896) (50,934) Core deposit intangibles - net $ 18,003 20,249 Customer and Contract intangible assets - gross $ 12,775 12,775 Less: accumulated amortization (10,842) (9,948) Customer and Contract intangible assets - net 1,933 2,827 Total intangible assets - net $ 19,936 23,076 The following information shows the actual aggregate amortization expense for the years ended December 31, 2020, 2019 and 2018 as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for each of the five succeeding fiscal years: For the year ended December 31, 2018 $ 5,848 For the year ended December 31, 2019 6,543 For the year ended December 31, 2020 6,856 For the year ending December 31, 2021 5,902 For the year ending December 31, 2022 4,680 For the year ending December 31, 2023 3,592 For the year ending December 31, 2024 2,692 For the year ending December 31, 2025 1,819 The following table provides information for the changes in the carrying amount of goodwill: Total Balance at December 31, 2018 $ 307,420 Goodwill acquired 38,683 Balance at December 31, 2019 346,103 Goodwill acquired 36,176 Balance at December 31, 2020 $ 382,279 Quarterly, the Company evaluates whether there are any triggering events that would require an update to our previous goodwill assessment. During the first quarter of 2020, the Company determined the COVID-19 pandemic and its negative effect on the global economy to be a triggering event. As a result, the Company, with the assistance of a third-party specialist, performed a quantitative impairment analysis in accordance with ASU 2017-04 as of March 31, 2020. This analysis indicated the aggregate fair value of Northwest Bank, the sole reporting unit of Northwest Bancshares, Inc., exceeded the carrying value and therefore goodwill was not impaired. Given the results of the quantitative goodwill analysis performed during the first quarter and the absence of any significant changes in the economic environment that would indicate a change in the conclusion of the quantitative analysis performed, the Company elected to perform a qualitative goodwill impairment test as of June 30, 2020 in accordance with ASC 350, as updated by ASU 2017-04, and concluded that goodwill was not impaired as of June 30, 2020. As of December 31, 2020 and 2019, there were no events or changes in circumstances that would cause us to update that goodwill impairment test and we have concluded there is no impairment in goodwill.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Deposits	Deposits Deposit balances at December 31, 2020 and 2019 are shown in the table below: December 31, 2020 2019 Noninterest-bearing demand deposits $ 2,716,224 1,609,653 Interest-bearing demand deposits 2,755,950 1,944,108 Money market deposit accounts 2,437,539 1,863,998 Savings deposits 2,047,424 1,604,838 Time deposits 1,642,096 1,569,410 Total deposits $ 11,599,233 8,592,007 The aggregate amount of time deposits with a minimum denomination of $100,000 at December 31, 2020 and 2019 was $578.5 million and $521.1 million, respectively. Generally, deposits in excess of $250,000 are not federally insured. At December 31, 2020 we had $3.744 billion of deposits in accounts exceeding $250,000. The following table summarizes the contractual maturity of time deposits at December 31, 2020 and 2019: December 31, 2020 2019 Due within 12 months $ 990,769 909,509 Due between 12 and 24 months 380,466 300,656 Due between 24 and 36 months 164,583 214,301 Due between 36 and 48 months 64,700 106,065 Due between 48 and 60 months 36,098 35,358 After 60 months 5,480 3,521 Total time deposits $ 1,642,096 1,569,410 The following table summarizes the interest expense incurred on the respective deposits for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Interest-bearing demand deposits $ 3,358 6,012 3,607 Money market deposit accounts 7,021 13,010 5,740 Savings deposits 2,614 3,115 3,064 Time deposits 22,903 27,079 18,574 Total interest expense on deposits $ 35,896 49,216 30,985

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds (a) Borrowings Borrowed funds at December 31, 2020 and 2019 are presented in the following table: December 31, 2020 2019 Amount Average rate Amount Average rate Term notes payable to the FHLB: Payable to the FHLB of Indianapolis acquired from MutualBank $ 22,054 1.92 % $ — — % Payable to the FHLB of Pittsburgh — — % 153,600 2.38 % Total term notes payable to the FHLB 22,054 153,600 Collateralized borrowings, due within one year 137,661 0.19 % 92,736 0.25 % Subordinated debentures, net of issuance costs 123,329 4.00 % — — % Total borrowed funds $ 283,044 246,336 Borrowings from the FHLB of Pittsburgh and Indianapolis, if any, are secured by our residential first mortgage and other qualifying loans. Certain of these borrowings are subject to restrictions or penalties in the event of prepayment. The revolving line of credit with the FHLB of Pittsburgh carries a commitment of $250.0 million. The rate is adjusted daily by the FHLB of Pittsburgh, and any borrowings on this line may be repaid at any time without penalty. At December 31, 2020 and December 31, 2019, collateralized borrowings due within one year were $137.7 million and $92.7 million, respectively. The collateralized borrowings are collateralized by various securities held in safekeeping by the FHLB of Pittsburgh. The market value of these securities exceeds the value of the collateralized borrowings. The average amount of collateralized borrowings outstanding in the years ended December 31, 2020, 2019 and 2018 was $122.8 million, $91.1 million and $102.3 million, respectively. The maximum amount of collateralized borrowings outstanding during the years ended December 31, 2020, 2019 and 2018 was $150.6 million, $101.1 million and $110.3 million, respectively. On September 9, 2020, the Company issued $125.0 million of 4.00% fixed-to-floating rate subordinated notes with a maturity date of September 15, 2030. The subordinated notes, which qualify as Tier 2 capital, bear interest at an annual rate of 4.00%, payable semi-annually in arrears commencing on March 15, 2021, and a floating rate of interest equivalent to the 3-month SOFR plus 3.89% payable quarterly in arrears commencing on December 15, 2025. The subordinated debt issuance costs of approximately $1.8 million are being amortized over five years on a straight-line basis into interest expense. (b) Trust Preferred Securities Prior to our merger with MutualBank on April 24, 2020, the Company had five statutory business trusts: Northwest Bancorp Capital Trust III, a Delaware statutory business trust, Northwest Bancorp Statutory Trust IV, a Connecticut statutory business trust, LNB Trust II, a Delaware statutory business trust, Union National Capital Trust I ("UNCT I"), a Delaware statutory business trust, and Union National Capital Trust II ("UNCT II"), a Delaware statutory business trust (the Trusts). As a result of the merger with MutualBank, we acquired two additional statutory business trusts: MFBC Statutory Trust I and Universal Preferred Trust; both are Delaware statutory trusts. The Trusts exist solely to issue preferred securities to third parties for cash, issue common securities to the Company in exchange for capitalization of the Trusts, invest the proceeds from the sale of trust securities in an equivalent amount of debentures of the Company, and engage in other activities that are incidental to those previously listed. The Trusts have invested the proceeds of the offerings in junior subordinated deferrable interest debentures issued by the Company. The structure of these debentures mirrors the structure of the trust-preferred securities. These subordinated debentures are the sole assets of the Trusts. As the shareholders of the trust preferred securities are the primary beneficiaries of the Trusts, the Trusts are not consolidated in our financial statements. The following table sets forth a summary of the cumulative trust preferred securities and the junior subordinated debt held by the Trust as of December 31, 2020 and 2019. Maturity date Interest rate Capital debt December 31, 2020 2019 Northwest Bancorp Capital Trust III December 30, 2035 3-month LIBOR plus 1.38% $ 50,000 51,547 51,547 Northwest Bancorp Statutory Trust IV December 15, 2035 3-month LIBOR plus 1.38% 50,000 51,547 51,547 LNB Trust II June 15, 2037 3-month LIBOR plus 1.48% 7,875 8,119 8,119 Union National Capital Trust I (1) January 23, 2034 3-month LIBOR plus 2.85% 8,000 7,925 7,900 Union National Capital Trust II (1) November 23, 2034 3-month LIBOR plus 2.00% 3,000 2,714 2,687 MFBC Statutory Trust I (1) September 15, 2035 3-month LIBOR plus 1.70% 5,000 3,476 — Universal Preferred Trust (1) October 7, 2035 3-month LIBOR plus 1.69% 5,000 3,466 — Total $ 128,875 128,794 121,800 (1) Net of discounts due to the fair value adjustment made at the time of acquisition. Cash distributions on the trust securities are made on a quarterly basis to the extent interest on the debentures is received by the Trusts. We have the right to defer payment of interest on the subordinated debentures at any time, or from time-to-time, for periods not exceeding five years. If interest payments on the subordinated debentures are deferred, the distributions on the trust securities also are deferred. To date there have been no interest deferrals. Interest on the subordinated debentures and distributions on the trust securities is cumulative. Our obligation constitutes a full, irrevocable, and unconditional guarantee on a subordinated basis of the obligations of the trust under the preferred securities. The Trusts must redeem the preferred securities when the debentures are paid at maturity or upon an earlier redemption of the debentures to the extent the debentures are redeemed. All or part of the debentures may be redeemed at any time. Also, the debentures may be redeemed at any time if existing laws or regulations, or the interpretation or application of these laws or regulations, change causing: • the interest on the debentures to no longer be deductible by the Company for federal income tax purposes; • the trust to become subject to federal income tax or to certain other taxes or governmental charges; • the trust to register as an investment company; or • the preferred securities do not qualify as Tier I capital. We may, at any time, dissolve any of the Trusts and distribute the debentures to the trust security holders, subject to receipt of any required regulatory approval(s).

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Total income tax was allocated for the years ended December 31, 2020, 2019 and 2018 as follows: Years ended December 31, 2020 2019 2018 Income tax expense $ 17,672 30,679 28,422 Shareholders’ equity for unrealized gain/(loss) on securities available-for-sale 5,061 3,992 (573) Shareholders’ equity for pension adjustment (3,774) (2,859) (24) Shareholders’ equity for swap fair value adjustment — — 223 Unallocated income tax $ 18,959 31,812 28,048 Income tax expense applicable to income before taxes consists of: Years ended December 31, 2020 2019 2018 Current $ 25,756 27,903 31,192 Deferred (8,084) 2,776 (2,770) Total income tax expense $ 17,672 30,679 28,422 A reconciliation of the expected federal statutory income tax rate to the effective rate, expressed as a percentage of pretax income for the years ended December 31, 2020, 2019 and 2018, is as follows: Years ended December 31, 2020 2019 2018 Expected tax rate 21.0 % 21.0 % 21.0 % Tax-exempt interest income (1.7) % (0.8) % (0.9) % State income tax, net of federal benefit 2.2 % 3.7 % 3.8 % Bank-owned life insurance (1.1) % (0.6) % (0.9) % Stock-based compensation 0.2 % (0.6) % (0.8) % Dividends on stock plans (0.9) % (0.6) % (0.6) % Low income housing and historic tax credits (0.9) % (0.5) % (0.6) % Other 0.3 % 0.1 % 0.2 % Effective tax rate 19.1 % 21.7 % 21.2 % The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are presented below: December 31, 2020 2019 Deferred tax assets: Deferred compensation expense $ 4,272 1,974 Bad debts 30,418 12,609 Other reserves 2,358 961 Accrued post-retirement benefit cost 778 436 Stock benefit plans 820 994 Pension and post-retirement benefits 19,405 15,916 Deferred income 540 728 Lease liability 11,713 11,493 Purchase accounting 412 — Net operating loss 2,800 504 Other 1,338 626 Total deferred tax assets 74,854 46,241 Deferred tax liabilities: Pension expense 6,198 5,864 Purchase accounting — 291 Intangible assets 15,419 14,464 Mortgage servicing rights 1,831 407 Fixed assets 4,740 5,755 Net deferred loan costs 1,548 5,042 Right of use asset 10,844 10,895 Unrealized gain on fair value of securities available-for-sale 6,332 1,259 Interest rate derivatives 1,268 — Other 2,670 314 Total deferred tax liabilities 50,850 44,291 Net deferred tax asset $ 24,004 1,950 We have $5.9 million of federal net operating loss carryovers subject to the annual limitation under Internal Revenue Code Section 382 at December 31, 2020. The carryovers begins to expire in 2029 and are expected to be fully realized. We have $39.7 million of Indiana net operating loss carryovers at December 31, 2020 which begin to expire in 2025 and are expected to be fully realized. We recorded a valuation allowance against state deferred tax assets of a Northwest subsidiary since the subsidiary is not expected to utilize its deferred tax assets in the foreseeable future. This valuation allowance, which is $333K as of December 31, 2020, is netted against other deferred tax assets in the preceding table. The Company is not required to provide deferred taxes on MutualBank’s tax loan loss reserve as of December 31, 1987. As of December 31, 2020, MutualBank had unrecognized deferred income taxes of approximately $3.1 million with respect to this reserve. This reserve could be recognized as taxable income and create a current and/or deferred tax liability using the income tax rates then in effect if one of the following occur: (1) the Bank’s retained earnings represented by this reserve are used for distributions in liquidation or for any other purpose other than to absorb losses from bad debts; (2) the Bank fails to qualify as a Bank, as provided by the Internal Revenue Code; or (3) there is a change in federal tax law. Other than stated above, we have determined that no valuation allowance is necessary for the deferred tax assets because it is more likely than not that these assets will be realized through future reversals of existing temporary differences and through future taxable income. We will continue to review the criteria related to the recognition of deferred tax assets on a regular basis. We utilize a comprehensive model to recognize, measure, present and disclose in our financial statements uncertain tax positions that the company has taken or expects to take on a tax return. We recognize interest accrued and penalties (if any) related to unrecognized tax benefits in income tax expense. The accrual for interest and penalties was not material for all years present. The following table presents changes in unrecognized tax benefits for the year ended December 31, 2020: Year ended December 31, 2020 Unrecognized tax benefits: Balance, beginning of year $ — Increases related to prior year tax positions 336 Decreases related to prior year tax positions (5) Increases related to current year tax positions — Settlements — Lapse of statute — Balance, end of year $ 331 It is reasonably possible that over the next twelve months the amount of unrecognized tax benefits may change from the reevaluation of uncertain tax positions arising in examinations, in appeals, or in the courts, or from the closure of tax statutes. We do not expect any significant changes in unrecognized tax benefits during the next twelve months.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Retained earnings are partially restricted in connection with regulations related to the insurance of deposit accounts, which requires Northwest to maintain certain statutory reserves. Northwest may not pay dividends on or repurchase any of its common stock if the effect thereof would reduce retained earnings below the level of adequate capitalization as defined by federal and state regulators. In tax years prior to fiscal 1997, Northwest was permitted, under the Internal Revenue Code ("IRC"), to deduct an annual addition to a reserve for bad debts in determining taxable income, subject to certain limitations. Bad debt deductions for income tax purposes are included in taxable income of later years only if the bad debt reserve is used subsequently for purposes other than to absorb bad debt losses. Because Northwest does not intend to use the reserve for purposes other than to absorb losses, no deferred income taxes have been provided prior to fiscal 1987. Retained earnings at December 31, 2020 and 2019 include approximately $39.1 million representing such bad debt deductions for which no deferred income taxes have been provided.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per common share ("EPS") is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding for the period, without considering any dilutive items. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company. During the year ended December 31, 2020, 4,677,841 stock options were not included in the computation of diluted earnings per share because the stock options’ exercise price was more than the average market price of the common shares of $11.54. During the years ending December 31, 2019 and 2018, all stock options outstanding were included in the computation of diluted earnings per share because the stock options’exercise price was less than the average market price of the common shares of $17.07 and $17.20, respectively. The computation of basic and diluted earnings per share for the years ended December 31, 2020, 2019 and 2018 follows: Years ended December 31, 2020 2019 2018 Net income available to common shareholders $ 74,854 110,432 105,491 Weighted average common shares outstanding (1) 120,244,474 104,878,774 102,073,888 Dilutive potential shares due to effect of stock options (1) — 960,375 1,492,013 Total weighted average common shares and dilutive potential shares (1) $ 120,244,474 105,839,149 103,565,901 Basic earnings per share (1) $ 0.62 1.05 1.03 Diluted earnings per share (1) $ 0.62 1.04 1.02 (1) Not in thousands.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans (a) Pension Plans We maintain noncontributory defined benefit pension plans covering substantially all employees and members of our board of directors. Retirement benefits are based on certain compensation levels, age, and length of service. Contributions are based on an actuarially determined amount to fund not only benefits attributed to service to date but also for those expected to be earned in the future. In addition, we have an unfunded Supplemental Executive Retirement Plan (“SERP”) to compensate those executive participants eligible for the defined benefit pension plan whose benefits are limited by Section 415 of the IRC. We also sponsor a retirement savings plan in which substantially all employees participate. We provide a matching contribution of 100% of each employee’s contribution to a maximum of 4% of the employee’s compensation. Effective August 1, 2020, the Plan was amended to include a soft freeze. The soft freeze will allow those employees in an eligible position that were hired, rehired, or acquired on or before July 31, 2020, to continue to vest and accrue additional benefits for each year they are credited with 1,000 hours or more. Employees that are hired, rehired, acquired, or transfer to an eligible job classification on or after August 1, 2020 are not eligible to participate in the Pension Plan. Total expense for all retirement plans, including defined benefit pension plans, was approximately $8.2 million, $6.7 million and $5.8 million, for the years ended December 31, 2020, 2019 and 2018, respectively. Components of net periodic pension cost and other amounts recognized in other comprehensive income: The following table sets forth the net periodic pension cost for the defined benefit pension plans for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Service cost $ 8,391 5,949 6,864 Interest cost 6,855 7,353 6,712 Expected return on plan assets (12,362) (11,037) (11,968) Amortization of prior service cost (2,322) (2,322) (2,322) Amortization of the net loss 3,695 3,423 3,489 Net periodic pension cost $ 4,257 3,366 2,775 The following table sets forth other changes in the defined benefit pension plans’ plan assets and benefit obligations recognized in other comprehensive income: Years ended December 31, 2020 2019 2018 Net (gain)/loss $ 11,521 8,235 (1,716) Amortization of prior service cost 2,323 2,323 2,323 Total recognized in other comprehensive income $ 13,844 10,558 607 Total recognized in net periodic pension cost and other comprehensive income $ 18,101 13,924 3,382 The estimated net loss and prior service credit for the defined benefit pension plan that will be amortized from accumulated other comprehensive income into net periodic cost over the next year is $4.0 million and $(2.3) million, respectively. The following table sets forth information for the defined benefit pension plans’ funded status at December 31, 2020 and 2019: December 31, 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 222,497 181,121 Service cost 8,391 5,949 Interest cost 6,855 7,353 Actuarial loss 29,084 35,203 Benefits paid (8,238) (7,129) Benefit obligation at end of year $ 258,589 222,497 Change in plan assets: Fair value of plan assets at beginning of year $ 193,541 160,766 Actual return on plan assets 26,228 34,582 Employer contributions 5,341 5,322 Benefits paid (8,238) (7,129) Fair value of plan assets at end of period $ 216,872 193,541 Funded status at end of year $ (41,717) (28,956) The following table sets forth the assumptions used to develop the net periodic pension cost: Years ended December 31, 2020 2019 2018 Discount rate 3.14 % 4.15 % 3.53 % Expected long-term rate of return on assets 6.50 % 7.00 % 7.00 % Rate of increase in compensation levels 3.00 % 3.00 % 3.00 % The following table sets forth the assumptions used to determine benefit obligations at the end of each period: Years ended December 31, 2020 2019 2018 Discount rate 2.39 % 3.14 % 4.15 % Expected long-term rate of return on assets 6.50 % 6.50 % 7.00 % Rate of increase in compensation levels 3.00 % 3.00 % 3.00 % The expected long-term rate of return on assets is based on the expected return of each of the asset categories, weighted based on the median of the target allocation for each category. We use the FTSE (previously Citigroup) Pension Liability Index rates matching the duration of our benefit payments as of the measurement date to determine the discount rate. The accumulated benefit obligation for the funded defined benefit pension plan was $254.2 million, $217.3 million, and $175.1 million at December 31, 2020, 2019 and 2018, respectively. The accumulated benefit obligation for all unfunded defined benefit plans was $4.4 million, $5.2 million, and $4.8 million at December 31, 2020, 2019 and 2018, respectively. The following table sets forth certain information related to our pension plans: December 31, 2020 2019 Projected benefit obligation $ 258,589 222,497 Accumulated benefit obligation 258,589 222,497 Fair value of plan assets 216,872 193,541 We anticipate making a contribution to our defined benefit pension plan of $2.0 million to $4.0 million during the year ending December 31, 2021. The investment policy as established by the Plan Administrative Committee, to be followed by the Trustee, is to invest assets based on the target allocations shown in the table below. To meet target allocation ranges set forth by the Plan Administrative Committee, periodically, the assets are reallocated by the Trustee. The investment policy is reviewed periodically to determine if the policy should be changed. Pension assets are conservatively invested with the goal of providing market or better returns with below market risks. Assets are invested in a balanced portfolio composed primarily of equities, fixed income, and cash or cash equivalent investments. The Trustee tries to maintain an approximate asset mix position of 20% to 50% bonds and 30% to 60% equities. A maximum of 10% may be invested in any one stock, including the stock of Northwest Bancshares, Inc. The objective of holding equity securities is to provide capital appreciation consistent with the ownership of the common stocks of medium to large companies. Acceptable bond investments are direct or agency obligations of the U.S. Government or investment grade corporate bonds. The average maturity of the bond portfolio shall not exceed ten years. The following table sets forth the weighted average asset allocation of defined benefit plans: Target December 31, allocation 2020 2019 Debt securities 20 – 50% 22 % 24 % Equity securities 30 – 60% 67 % 70 % Other 5 – 50% 11 % 6 % Total 100 % 100 % All of the assets held by the defined benefit pension plan are measured and recorded at estimated fair value on our balance sheet on a recurring basis as Level 1 assets, as defined by the fair value hierarchy defined in Note 17. The following tables sets forth the pension plan assets as of December 31, 2020 and 2019: December 31, 2020 Assets at Fair Value Defined benefit pension assets: Common stock $ 52,019 52,019 Mutual funds 140,746 140,746 Money market funds 15,068 15,068 Other 8,879 8,879 Total defined benefit pension plan assets (1) $ 216,712 216,712 (1) The defined benefit pension plan statement of net assets also includes accrued interest and dividends resulting in net assets available for benefits of $216.9 million. December 31, 2019 Assets at Fair Value Defined benefit pension assets: Common stock $ 45,198 45,198 Mutual funds 127,186 127,186 Money market funds 12,024 12,024 Other 8,953 8,953 Total defined benefit pension plan assets (1) $ 193,361 193,361 (1) The defined benefit pension plan statement of net assets also includes accrued interest and dividends resulting in net assets available for benefits of $193.5 million. The benefits expected to be paid in each year from 2021 to 2025 are $8.3 million, $8.0 million, $8.1 million, $8.5 million and $8.8 million, respectively. The aggregate benefits expected to be paid in the five years from 2026 to 2030 are $48.3 million. The expected benefits to be paid are based on the same assumptions used to measure our benefit obligations at December 31, 2020 and include estimated future employee service. (b) Post-retirement Healthcare Plan In addition to pension benefits, we provide post-retirement healthcare benefits for certain employees who were employed as of October 1, 1993 and were at least 55 years of age on that date. We use the accrual method of accounting for post-retirement benefits other than pensions. Components of net periodic benefit cost and other amounts recognized in other comprehensive income: The following table sets forth the net periodic benefit cost for the post-retirement healthcare benefits plan for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Interest cost $ 26 52 54 Amortization of net loss 18 68 98 Net period benefit cost $ 44 120 152 The following table sets forth other changes in the post-retirement healthcare plan’s plan assets and benefit obligations recognized in other comprehensive income: Years ended December 31, 2020 2019 2018 Net gain $ (51) (475) (305) Total recognized in other comprehensive income $ (51) (475) (305) Total recognized in net periodic benefit cost and other comprehensive loss $ (7) (355) (153) The estimated net loss for the post-retirement healthcare benefit plan that will be amortized from accumulated other comprehensive income into net periodic benefit cost over the year ending December 31, 2021 is $14,000 . The following table sets forth the funded status of the post-retirement healthcare benefit plan at December 31, 2020 and 2019: December 31, 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 889 1,332 Interest cost 26 52 Actuarial gain (34) (405) Benefits paid (111) (90) Benefit obligation at end of year $ 770 889 Change in plan assets: Employer contributions 111 90 Benefits paid (111) (90) Funded status at year end $ (770) (889) The assumptions used to develop the preceding information for post-retirement healthcare benefits are as follows: Years ended December 31, 2020 2019 2018 Discount rate 3.14 % 4.15 % 3.53 % Monthly cost of healthcare insurance per beneficiary (1) $ 370 391 507 Annual rate of increase in healthcare costs 4.00 % 4.00 % 4.00 % (1) Not in thousands. If the assumed rate of increase in healthcare costs was increased by one percentage point to 5% from the level presented above, the interest cost component of net periodic post-retirement healthcare benefit cost would increase by $3,000 and the accumulated post-retirement benefit obligation for healthcare benefits would increase by $20,000. The following table sets forth information for plans with an accumulated benefit obligation in excess of plan assets: December 31, 2020 2019 Projected benefit obligation $ 770 889 Accumulated benefit obligation 770 889 (c) Common Stock Awards On April 18, 2018, we established the Northwest Bancshares, Inc. 2018 Equity Incentive Plan with 1,500,000 common shares authorized for award. From this plan, we awarded employees 390,030 common shares and outside directors 24,300 common shares with a grant date fair value of $16.59 per share (total market value of $6.9 million at issuance) on May 14, 2018. We also awarded employees 256,800 common shares and outside directors 24,300 common shares with a grant date fair value of $17.27 per share (total market value of $4.9 million at issuance) on May 22, 2019. In addition, on May 20, 2020, we awarded employees 261,091 restricted common shares and directors 21,600 restricted common shares with a grant date fair value of $9.71. These common shares vest over a seven-year period with the first vesting occurring on the grant date. Total common shares forfeited from the 2018 plan were 116,617, of which, 74,007 shares were forfeited during the year ended December 31, 2020. Forfeited shares may be awarded to other eligible recipients in future grants until the plan termination date in 2028. (d) Stock Option Plans The Northwest Bancshares, Inc. 2018 Equity Incentive Plan also authorized the granting of 3,500,000 stock options authorized for award. On May 14, 2018, we granted employees 831,160 stock options and outside directors 64,800 stock options with an exercise price of $16.59 per share. On May 22, 2019, we granted employees 547,410 stock options and outside directors 64,800 stock options with an exercise price of $17.27 per share. On May 20, 2020, we granted employees 556,476 stock options and directors 57,600 stock options with an exercise price of $9.71 per share. These awarded stock options vest over a seven-year period with the first vesting occurring on the grant date with a ten-year exercise period from the grant date. The following table summarizes the activity in our option plans during the years ended December 31, 2020, 2019 and 2018 (amounts in this table are not in thousands): Years ended December 31, 2020 2019 2018 Number Weighted average Number Weighted average Number Weighted average Balance at beginning of year 5,101,351 $ 14.28 5,612,812 $ 13.49 5,695,570 $ 12.75 Granted (1) 614,076 9.71 612,210 17.27 895,960 16.59 Exercised (2) (131,309) 11.81 (917,845) 11.77 (830,712) 10.38 Forfeited/expired (340,946) 14.39 (205,826) 14.28 (148,006) 12.52 Balance at end of year 5,243,172 13.72 5,101,351 14.28 5,612,812 13.49 Exercisable at end of year 3,350,356 13.53 2,803,918 13.36 3,016,175 12.61 (1) Weighted average fair value of options at grant date: $0.13, $1.14 and $1.49, respectively. (2) The total intrinsic value of options exercised was $444,000, $5.2 million and $4.8 million, respectively. The aggregate intrinsic value of all options expected to vest and fully vested options were both zero because the average exercise price was more than the closing market price per share at December 31, 2020. The following table summarizes the number of options outstanding, number of options exercisable, and weighted average remaining life of all option grants as of December 31, 2020 (amounts in this table are not in thousands): Exercise price $9.71 Exercise price $11.70 Exercise price $12.12 Exercise price $12.17 Exercise price $12.32 Exercise price $12.37 Options outstanding: Number of options 565,331 270,966 90,248 2,700 902,228 389,528 Weighted average remaining contract life (years) 6.50 1.50 0.10 0.25 0.50 4.50 Options exercisable: Number of options 96,865 252,096 90 2,700 902,228 269,944 Weighted average remaining term - vested (years) 6.50 1.50 0.10 0.25 0.50 4.50 Exercise price $12.44 Exercise price $13.15 Exercise price $14.15 Exercise price $15.57 Exercise price $16.59 Exercise price $17.27 Total $14.28 Options outstanding: Number of options 311,934 331,724 497,188 603,792 749,320 528,213 5,243,172 Weighted average remaining contract life (years) 2.50 3.50 5.50 6.50 4.50 5.50 3.92 Options exercisable: Number of options 267,230 256,922 304,568 317,526 398,156 191,873 3,350,356 Weighted average remaining term - vested (years) 2.50 3.50 5.50 6.50 4.50 5.50 3.12

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Disclosures About Fair Value of Financial Instruments	Disclosures About Fair Value of Financial Instruments We are required to disclose fair value information about financial instruments whether or not recognized in the Consolidated Statement of Financial Condition. Fair value information of certain financial instruments and all nonfinancial instruments is not required to be disclosed. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company. Financial assets and liabilities recognized or disclosed at fair value on a recurring basis and certain financial assets and liabilities on a non-recurring basis are accounted for using a three-level hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. This hierarchy gives the highest priority to quoted prices with readily available independent data in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable market inputs (Level 3). When various inputs for measurement fall within different levels of the fair value hierarchy, the lowest level input that has a significant impact on fair value measurement is used. Financial assets and liabilities are categorized based upon the following characteristics or inputs to the valuation techniques: • Level 1 - Financial assets and liabilities for which inputs are observable and are obtained from reliable quoted prices for identical assets or liabilities in actively traded markets. This is the most reliable fair value measurement and includes, for example, active exchange-traded equity securities. • Level 2 - Financial assets and liabilities for which values are based on quoted prices in markets that are not active or for which values are based on similar assets or liabilities that are actively traded. Level 2 also includes pricing models in which the inputs are corroborated by market data, for example, matrix pricing. • Level 3 - Financial assets and liabilities for which values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. Level 3 inputs include the following: • Quotes from brokers or other external sources that are not considered binding; • Quotes from brokers or other external sources where it cannot be determined that market participants would in fact transact for the asset or liability at the quoted price; and • Quotes and other information from brokers or other external sources where the inputs are not deemed observable. We are responsible for the valuation process and as part of this process may use data from outside sources in establishing fair value. We perform due diligence to understand the inputs used or how the data was calculated or derived. We also corroborate the reasonableness of external inputs in the valuation process. The carrying amounts reported in the Consolidated Statement of Financial Condition approximate fair value for the following financial instruments: cash and cash equivalents, marketable securities available-for-sale, accrued interest receivable, interest rate lock commitments, forward commitments, interest rate swaps, savings and checking deposits and accrued interest payable. Marketable Securities Where available, market values are based on quoted market prices, dealer quotes, and prices obtained from independent pricing services. Debt securities — available-for-sale - Generally, debt securities are valued using pricing for similar securities, recently executed transactions and other pricing models utilizing observable inputs. The valuation for most debt securities is classified as Level 2. Securities within Level 2 include corporate bonds, municipal bonds, mortgage-backed securities and U.S. government obligations. Certain debt securities which were AAA rated at purchase do not have an active market and as such we have used an alternative method to determine the fair value of these securities. The fair value has been determined using a discounted cash flow model using market assumptions, which generally include cash flow, collateral and other market assumptions. As such, securities which otherwise would have been classified as Level 2 securities if an active market for those assets or similar assets existed are included herein as Level 3 assets. Debt securities — held-to-maturity - The fair value of debt securities held-to-maturity is determined in the same manner as debt securities available-for-sale. Loans Receivable Loans with comparable characteristics including collateral and re-pricing structures are segregated for valuation purposes. Each loan pool is separately valued utilizing a discounted cash flow analysis. Projected monthly cash flows are discounted to present value using a market rate for comparable loans, which is not considered an exit price. Characteristics of comparable loans include remaining term, coupon interest, and estimated prepayment speeds. Delinquent loans are separately evaluated given the impact delinquency has on the projected future cash flow of the loan including the approximate discount or market rate, which is not considered an exit price. Loans Held-for-Sale The estimated fair value of loans held-for-sale is based on market bids obtained from potential buyers. Loans Held for Investment The fair value of the loans held for investment is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans adjusted for liquidity and credit risk. FHLB Stock Due to the restrictions placed on the transferability of FHLB stock, it is not practical to determine the fair value. Deposit Liabilities The estimated fair value of deposits with no stated maturity, which includes demand deposits, money market, and other savings accounts, is the amount payable on demand. Although market premiums paid for depository institutions reflect an additional value for these low-cost deposits, adjusting fair value for any value expected to be derived from retaining those deposits for a future period of time or from the benefit that results from the ability to fund interest-earning assets with these deposit liabilities is prohibited. The fair value estimates of deposit liabilities do not include the benefit that results from the low-cost funding provided by these deposits compared to the cost of borrowing funds in the market. Fair values for time deposits are estimated using a discounted cash flow calculation that applies contractual cost currently being offered in the existing portfolio to current market rates being offered locally for deposits of similar remaining maturities. The valuation adjustment for the portfolio consists of the present value of the difference of these two cash flows, discounted at the assumed market rate of the corresponding maturity. Borrowed Funds Fixed rate advances are valued by comparing their contractual cost to the prevailing market cost. The carrying amount of repurchase agreements approximates their fair value. The fair value of our subordinated debentures is calculated using the discounted cash flows at rates observable for other similarly traded liabilities. Junior Subordinated Debentures The fair value of junior subordinated debentures is calculated using the discounted cash flows at the prevailing rate of interest. Interest Rate Lock Commitments and Forward Commitments The fair value of interest rate lock commitments is based on the value of underlying loans held-for-sale which is based on quoted prices for similar loans in the secondary market. This value is then adjusted based on the probability of the loan closing (i.e., the “pull-through” amount, a significant unobservable input). The fair value of forward sale commitments is based on quoted prices from the secondary market based on the settlement date of the contracts. Cash Flow Hedges, Interest Rate and Foreign Exchange Swap Agreements The fair value of interest rate swaps is based upon the present value of the expected future cash flows using the LIBOR swap curve, the basis for the underlying interest rate. To price interest rate swaps, cash flows are first projected for each payment date using the fixed rate for the fixed side of the swap and the forward rates for the floating side of the swap. These swap cash flows are then discounted to time zero using LIBOR zero-coupon interest rates. The sum of the present value of both legs is the fair market value of the interest rate swap. These valuations have been derived from our third party vendor’s proprietary models rather than actual market quotations. The proprietary models are based upon financial principles and assumptions that we believe to be reasonable. The fair value of the foreign exchange swap is derived from proprietary models rather than actual market quotations. The proprietary models are based upon financial principles and assumptions we believe to be reasonable. Off-Balance-Sheet Financial Instruments These financial instruments generally are not sold or traded, and estimated fair values are not readily available. However, the fair value of commitments to extend credit and standby letters of credit is estimated using the fees currently charged to enter into similar agreements. Commitments to extend credit are generally short-term in nature and, if drawn upon, are issued under current market terms. At December 31, 2020 and 2019, there was no significant unrealized appreciation or depreciation on these financial instruments. The following table sets forth the carrying amount and estimated fair value of our financial instruments included in the Consolidated Statement of Financial Condition at December 31, 2020 and 2019: December 31, 2020 Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 736,277 736,277 736,277 — — Securities available-for-sale 1,398,941 1,398,941 — 1,398,941 — Securities held-to-maturity 178,887 179,666 — 179,666 — Loans receivable, net 10,387,636 10,334,521 — — 10,334,521 Residential mortgage loans held-for-sale 58,786 58,786 — — 58,786 Accrued interest receivable 35,554 35,554 35,554 — — Interest rate lock commitments 6,465 6,465 — — 6,465 Forward commitments 1,105 1,105 — 1,105 — Interest rate swaps not designated as hedging instruments 53,863 53,863 — 53,863 — FHLB stock 21,748 21,748 — — — Total financial assets $ 12,879,262 12,826,926 771,831 1,633,575 10,399,772 Financial liabilities: Savings and checking accounts $ 9,957,137 9,957,137 9,957,137 — — Time deposits 1,642,096 1,669,546 — — 1,669,546 Borrowed funds 283,044 283,074 159,745 123,329 — Junior subordinated debentures 128,794 121,106 — — 121,106 Interest rate swaps not designated as hedging instruments 54,579 54,579 — 54,579 — Risk participation agreements 86 86 — 86 — Accrued interest payable 2,054 2,054 2,054 — — Total financial liabilities $ 12,067,790 12,087,582 10,118,936 177,994 1,790,652 December 31, 2019 Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 60,846 60,846 60,846 — — Securities available-for-sale 819,901 819,901 — 819,901 — Securities held-to-maturity 18,036 18,223 — 18,223 — Loans receivable, net 8,743,024 8,666,149 — — 8,666,149 Residential mortgage loans held-for-sale 7,709 7,709 — — 7,709 Accrued interest receivable 25,755 25,755 25,755 — — Interest rate lock commitments 559 559 — — 559 Forward commitments 145 145 — 145 — Interest rate swaps 20,889 20,889 — 20,889 — FHLB stock 14,740 14,740 — — — Total financial assets $ 9,711,604 9,634,916 86,601 859,158 8,674,417 Financial liabilities: Savings and checking deposits $ 7,022,597 7,022,597 7,022,597 — — Time deposits 1,569,410 1,574,063 — — 1,574,063 Borrowed funds 246,336 246,341 246,341 — — Junior subordinated debentures 121,800 115,518 — — 115,518 Interest rate swaps 20,952 20,952 — 20,952 — Risk participation agreements 39 39 — 39 — Accrued interest payable 1,142 1,142 1,142 — — Total financial liabilities $ 8,982,276 8,980,652 7,270,080 20,991 1,689,581 Fair value estimates are made at a point-in-time, based on relevant market data and information about the instrument. The preceding methods and assumptions were used in estimating the fair value of financial instruments at December 31, 2020 and 2019. The following table represents assets and liabilities measured at fair value on a recurring basis as of December 31, 2020: Level 1 Level 2 Level 3 Total at Debt securities: U.S. government and agencies $ — 40,917 — 40,917 Government sponsored enterprises — 94,507 — 94,507 States and political subdivisions — 116,813 — 116,813 Total debt securities — 252,237 — 252,237 Residential mortgage-backed securities: GNMA — 23,026 — 23,026 FNMA — 203,571 — 203,571 FHLMC — 134,572 — 134,572 Non-agency — 465 — 465 Collateralized mortgage obligations: GNMA — 343,409 — 343,409 FNMA — 262,109 — 262,109 FHLMC — 179,552 — 179,552 Total mortgage-backed securities — 1,146,704 — 1,146,704 Interest rate lock commitments — — 6,465 6,465 Forward commitments — 1,105 — 1,105 Interest rate swaps not designated as hedging instruments — 53,863 — 53,863 Total assets $ — 1,453,909 6,465 1,460,374 Interest rate swaps not designated as hedging instruments $ — 54,579 — 54,579 Risk participation agreements — 86 — 86 Total liabilities $ — 54,665 — 54,665 The following table represents assets and liabilities measured at fair value on a recurring basis as of December 31, 2019: Level 1 Level 2 Level 3 Total at Debt securities: U.S. government and agencies $ — 14,991 — 14,991 Government sponsored enterprises — 104,784 — 104,784 States and political subdivisions — 26,048 — 26,048 Corporate — 919 — 919 Total debt securities — 146,742 — 146,742 Residential mortgage-backed securities: GNMA — 23,264 — 23,264 FNMA — 89,259 — 89,259 FHLMC — 50,139 — 50,139 Non-agency — 497 — 497 Collateralized mortgage obligations: GNMA — 207,016 — 207,016 FNMA — 184,682 — 184,682 FHLMC — 118,302 — 118,302 Total mortgage-backed securities — 673,159 — 673,159 Interest rate lock commitments — — 559 559 Forward commitments — 145 — 145 Interest rate swaps — 20,889 — 20,889 Total assets $ — 840,935 559 841,494 Interest rate swaps — 20,952 — 20,952 Risk participation agreements — 39 — 39 Total liabilities $ — 20,991 — 20,991 The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2020 and 2019: December 31, 2020 2019 Beginning balance January 1, $ 559 — Total gains or losses: Included in net income — — Net activity 5,906 559 Transfers from Level 3 — — Transfers into of Level 3 — — Ending balance December 31, $ 6,465 559 Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans held for sale, loans measured for impairment, real estate owned, and MSRs. The following table represents the fair market measurement for only those nonrecurring assets that had a fair market value below the carrying amount as of December 31, 2020: Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 95,303 95,303 Real estate owned, net — — 2,232 2,232 Total assets $ — — 97,535 97,535 The following table represents the fair market measurement for only those nonrecurring assets that had a fair market value below the carrying amount as of December 31, 2019: Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 46,238 46,238 Real estate owned, net — — 950 950 Total assets $ — — 47,188 47,188 Loans individually assessed - A loan is considered to be individually assessed as described in Note 1(f) as part of the adoption of ASU 2016-13. We classify loans individually assessed as nonrecurring Level 3. Real estate owned - Real estate owned is comprised of property acquired through foreclosure or voluntarily conveyed by borrowers. Assets are recorded on the date acquired at the lower of the related loan balance or fair value, less estimated disposition costs, with the fair value being determined by appraisal. Subsequently, foreclosed assets are valued at the lower of the amount recorded at acquisition date or fair value, less estimated disposition costs. We classify real estate owned as nonrecurring Level 3. The following table presents additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at December 31, 2020: Fair value Valuation Significant Range Loans individually assessed $ 95,303 Appraisal value (1) Estimated cost to sell 10% Discounted cash flow Discount rate 2.00% to 16.60% (8.26%) Real estate owned, net $ 2,232 Appraisal value (1) Estimated cost to sell 10% (1) Fair value is generally determined through independent appraisals of the underlying collateral, which may include Level 3 inputs that are not identifiable, or by using the discounted cash flow method if the loan is not collateral dependent.

Regulatory Capital Requirements

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Capital Requirements	Regulatory Capital Requirements We and our banking subsidiary are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by the regulators that, if undertaken, could have a direct material effect on our financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices must be met. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Applicable regulations limit an organization’s capital distributions and certain discretionary bonus payments if the organization does not hold a “capital conservation buffer” consisting of 2.5% of Total Tier 1 and Common Equity Tier 1 ("CET1") capital to risk-weighted assets in addition to the amount necessary to meet its minimum risk-based capital requirements. Quantitative measures established by regulation to ensure capital adequacy require us and our banking subsidiary to maintain minimum amounts and ratios (set forth in the table below) of Total, Tier 1, and CET1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of Tier I capital to average assets (as defined). As of December 31, 2020 and 2019, we and our banking subsidiary exceeded all capital adequacy requirements to which we were subject. As of December 15, 2020, the most recent assessment from FDIC, Northwest Bank exceeded all regulatory capital requirements and their regulatory capital ratios were above the minimum levels required to be considered “well-capitalized” for regulatory purposes . To be considered as “well capitalized,” the bank must maintain total risk-based, Tier 1 risk-based, CET 1 risk-based, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the bank’s categories. The actual, required, and well capitalized levels as of December 31, 2020 and 2019 were as follows: At December 31, 2020 Actual Minimum capital Well capitalized Amount Ratio Amount Ratio Amount Ratio Total capital (to risk weighted assets) Northwest Bancshares, Inc. $ 1,654,198 16.642 % $ 1,043,693 10.500 % $ 993,993 10.000 % Northwest Bank 1,478,310 14.887 % 1,042,655 10.500 % 993,004 10.000 % Tier 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,406,321 14.148 % 844,894 8.500 % 795,195 8.000 % Northwest Bank 1,354,028 13.636 % 844,054 8.500 % 794,403 8.000 % CET 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,281,516 12.893 % 695,795 7.000 % 646,096 6.500 % Northwest Bank 1,354,028 13.636 % 695,103 7.000 % 645,453 6.500 % Tier 1 capital (leverage) Northwest Bancshares, Inc. 1,406,321 10.145 % 554,501 4.000 % 693,126 5.000 % Northwest Bank 1,354,028 9.903 % 546,905 4.000 % 683,631 5.000 % (1) Amounts and ratios include the 2020 capital conservation buffer of 2.5% with the exception of Tier 1 capital to average assets. For further information related to the capital conservation buffer, see "Item 1. Business - Supervision and Regulation". At December 31, 2019 Actual Minimum capital Well capitalized Amount Ratio Amount Ratio Amount Ratio Total capital (to risk weighted assets) Northwest Bancshares, Inc. $ 1,300,321 15.701 % $ 869,585 10.500 % $ 828,176 10.000 % Northwest Bank 1,146,641 13.858 % 868,768 10.500 % 827,398 10.000 % Tier 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,242,380 15.001 % 703,950 8.500 % 662,541 8.000 % Northwest Bank 1,087,727 13.146 % 703,288 8.500 % 661,918 8.000 % CET 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,124,259 13.575 % 579,723 7.000 % 538,314 6.500 % Northwest Bank 1,087,727 13.146 % 579,178 7.000 % 537,809 6.500 % Tier 1 capital (leverage) Northwest Bancshares, Inc. 1,242,380 11.913 % 417,143 4.000 % 521,428 5.000 % Northwest Bank 1,087,727 10.515 % 413,772 4.000 % 517,216 5.000 % (1) Amounts and ratios include the 2019 capital conservation buffer of 2.5% with the exception of Tier 1 capital to average assets. For further information related to the capital conservation buffer, see Item 1. Business - "Supervision and Regulation".

Contingent Liabilities

Contingent Liabilities	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	Contingent Liabilities We and our subsidiaries are subject to a number of asserted and unasserted claims encountered in the normal course of business. Management believes that the aggregate liability, if any, that may result from such potential litigation will not have a material adverse effect on our financial statements. However, we cannot presently determine whether or not any claims against us will have a material adverse effect on our results of operations in any future reporting period.

Legal Proceedings

Legal Proceedings	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings	Legal Proceedings We establish accruals for legal proceedings when information related to the loss contingencies represented by those matters indicates both that a loss is probable and that the amount of loss can be reasonably estimated. As of December 31, 2020, we do not anticipate that the aggregate ultimate liability arising out of any pending or threatened legal proceedings will be material to our Consolidated Financial Statements. Any such accruals are adjusted thereafter as appropriate to reflect changes in circumstances. Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, any amounts accrued may not represent the ultimate loss to us from legal proceedings. During the year-ended December 31, 2018, Northwest and our subsidiary, Northwest Insurance Services (“NWIS”), were involved in a lawsuit against, among others, First National Bank of Pennsylvania (“FNB”) and their insurance subsidiary, First National Insurance Agency, LLC (“FNIA”). All counterclaims against Northwest were discontinued and, in December 2018, a verdict was rendered in favor of NWIS on several of its claims. Post-trial proceedings have continued throughout the current year and, due to the inherent uncertainties with respect to these proceedings, we have not accrued any awards associated with this verdict within our Consolidated Financial Statements as of December 31, 2020.

Components of Accumulated Other

Components of Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Accumulated Other Comprehensive Income	Components of Accumulated Other Comprehensive Income The following table sets forth the components of accumulated other comprehensive loss as of December 31, 2020 and 2019: December 31, 2020 2019 Unrealized gain on marketable securities available-for-sale $ 16,843 3,147 Defined benefit pension plans (50,392) (40,088) Accumulated other comprehensive loss $ (33,549) (36,941) The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2020: Unrealized gains and losses on securities Change in Change in defined Total Balance as of January 1, $ 3,147 — (40,088) (36,941) Other comprehensive income/(loss) before reclassification adjustments (1), (2), (3) 13,711 (946) (11,301) 1,464 Amounts reclassified from accumulated other comprehensive income (4), (5), (6) (15) 946 997 1,928 Net other comprehensive income/(loss) 13,696 — (10,304) 3,392 Balance as of December 31, $ 16,843 — (50,392) (33,549) (1) Consists of unrealized holding gains, net of tax of $5,607. (2) Consists of unrealized holdings losses, net of tax $(209). (3) Consists of unrealized holding losses, net of tax of $(4,169). (4) Consists of realized gains, net of tax of $(6). (5) Consists of realized losses interest rate swaps , net of tax of $209. (6) Consists of realized gains, net of tax of $395. The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2019: Unrealized gains and losses on securities available-for-sale Change in defined Total Balance as of January 1, $ (6,832) (32,864) (39,696) Other comprehensive income/(loss) before reclassification adjustments (1), (2) 9,984 (8,059) 1,925 Amounts reclassified from accumulated other comprehensive income (3), (4) (5) 835 830 Net other comprehensive income/(loss) 9,979 (7,224) 2,755 Balance as of December 31, $ 3,147 (40,088) (36,941) (1) Consists of unrealized holding gains, net of tax of $3,990. (2) Consists of unrealized holding losses, net of tax of $(3,193). (3) Consists of realized gains, net of tax of $(2). (4) Consists of realized gains, net of tax of $334. The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2018: Unrealized gains and losses on securities Change in Change in Total Balance as of January 1, $ (4,409) (691) (26,980) (32,080) Reclassification due to adoption of ASU No. 2018-02 (991) (149) (5,606) (6,746) Other comprehensive income/(loss) before reclassification adjustments (1), (2), (3) (1,277) 840 (1,181) (1,618) Amounts reclassified from accumulated other comprehensive income (4), (5) (155) — 903 748 Net other comprehensive income/(loss) (2,423) 691 (5,884) (7,616) Balance as of December 31, $ (6,832) — (32,864) (39,696) (1) Consists of unrealized holding losses, net of tax of $(513). (2) Consists of unrealized holding losses, net of tax of $223. (3) Consists of unrealized holding losses, net of tax of $(770). (4) Consists of realized gains, net of tax of $(60). (5) Consists of realized gains, net of tax of $746.

Parent Company Only Financial S

Parent Company Only Financial Statements - Condensed	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Statements - Condensed	Parent Company Only Financial Statements - Condensed Statements of Financial Condition December 31, 2020 2019 Assets Cash and cash equivalents $ 172,142 150,926 Investment in bank subsidiary 1,585,429 1,314,724 Other assets 9,352 9,817 Total assets $ 1,766,923 1,475,467 Liabilities and shareholders’ equity Liabilities: Debentures payable $ 252,123 121,801 Other liabilities 1,889 381 Total liabilities 254,012 122,182 Shareholders’ equity 1,512,911 1,353,285 Total liabilities and shareholders’ equity $ 1,766,923 1,475,467 Statements of Income Years ended December 31, 2020 2019 2018 Income: Interest income $ 196 209 198 Other income 553 628 752 Dividends from bank subsidiary* — 110,000 105,000 Undistributed earnings from equity investment in bank subsidiary 80,996 5,102 5,149 Total income 81,745 115,939 111,099 Expense: Compensation and employee benefits 1,234 1,124 1,225 Other expenses 2,241 791 660 Interest expense 4,933 4,833 4,961 Total expense 8,408 6,748 6,846 Income before income taxes 73,337 109,191 104,253 Income tax benefit (1,517) (1,241) (1,238) Net income $ 74,854 110,432 105,491 * The dividend paid by Northwest Bank to Northwest Bancshares, Inc. was subsequently paid in January 2021 in the amount of $73.0 million. Statements of Cash Flows Years ended December 31, 2020 2019 2018 Operating activities: Net income $ 74,854 110,432 105,491 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiary (80,996) (5,102) (5,149) Gain on sale of marketable securities — (29) (146) Net change in other assets and liabilities 128,287 (43,453) 91,520 Net cash provided by operating activities 122,145 61,848 191,716 Investing activities: Net purchase sale of marketable securities — — (550) Net cash used in investing activities — — (550) Financing activities: Cash dividends paid on common stock (93,132) (76,173) (69,921) Repurchase of Northwest stock (9,276) — — Proceeds from stock options exercised 1,479 9,727 8,191 Net cash used in financing activities (100,929) (66,446) (61,730) Net increase/(decrease) in cash and cash equivalents $ 21,216 (4,598) 129,436 Cash and cash equivalents at beginning of period $ 150,926 155,524 26,088 Net increase/(decrease) in cash and cash equivalents 21,216 (4,598) 129,436 Cash and cash equivalents at end of period $ 172,142 150,926 155,524

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments We are a party to derivative financial instruments in the normal course of business to manage our own exposure to fluctuations in interest rates and to meet the needs of our customers. The primary derivatives that we use are interest rate swaps and caps and foreign exchange contracts, which are entered into with counterparties that meet established credit standards. We believe that the credit risk inherent in all of our derivative contracts is minimal based on our credit standards and the netting and collateral provisions of the interest rate swap agreements. (a) Derivatives Designated as Hedging Instruments During March 2020, the Company entered into four separate pay-fixed interest rate swaps in order to synthetically convert short-term three month FHLB advances to fixed-rate term funding with an aggregate value of $100 million with maturities ranging from three Derivatives and Hedging . The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the quarter of September 30, 2020, the Company discontinued these cash flow hedges and, as a result, reclassified a $1.3 million loss into earnings. (b) Derivatives Not Designated as Hedging Instruments We act as an interest rate or foreign exchange swap counterparty for certain commercial borrowers in the normal course of servicing our customers, which are accounted for at fair value. We manage our exposure to such interest rate or foreign exchange swaps by entering into corresponding and offsetting interest rate swaps with third parties that mirror the terms of the swaps we have with the commercial borrowers. These positions (referred to as “customer swaps”) directly offset each other and our exposure is the fair value of the derivatives due to changes in credit risk of our commercial borrowers and third parties. Customer swaps are recorded within other assets or other liabilities on the Consolidated Statement of Financial Condition at their estimated fair value. Changes to the fair value of assets and liabilities arising from these derivatives are included, net, in other operating income in the Consolidated Statement of Income. We enter into interest rate lock commitments for residential mortgage loans which commit us to lend funds to a potential borrower at a specific interest rate within a specified period of time. Interest rate lock commitments that relate to the origination of mortgage loans that will be held-for-sale are considered derivative financial instruments under applicable accounting guidance. Interest rate lock commitments on loans held-for-sale are carried at fair value in other assets on the Consolidated Statement of Financial Condition. Northwest sells loans to the secondary market on a mandatory or best efforts basis. The loans sold on a mandatory basis commit us to deliver a specific principal amount of mortgage loans to an investor at a specified price, by a specified date, or the commitment must be paired off. These forward commitments entered into on a mandatory delivery basis meet the definition of a derivative financial instrument. All closed loans to be sold on a mandatory delivery basis are classified as held-for-sale on the Consolidated Statement of Financial Condition. Changes to the fair value of the interest rate lock commitments and the forward commitments are recorded in mortgage banking income in the Consolidated Statements of Income. We enter into risk participation agreements with financial institution counterparties for interest rate swaps related to loans in which we are a participant. The risk participation agreements provide credit protection to the financial institution should the borrower fail to perform on its interest rate derivative contract with the financial institution. The following table presents information regarding our derivative financial instruments for the periods indicated: Asset derivatives Liability derivatives Notional amount Fair value Notional amount Fair value At December 31, 2020 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 599,300 53,863 599,300 54,579 Interest rate lock commitments 171,357 6,465 — — Forward commitments 25,474 1,105 — — Risk participation agreements — — 77,532 86 Total derivatives $ 796,131 61,433 676,832 54,665 At December 31, 2019 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 391,502 20,889 391,502 20,952 Interest rate lock commitments 24,373 559 — — Forward commitments 5,151 145 — — Risk participation agreements — — 41,164 39 Total derivatives $ 421,026 21,593 432,666 20,991 The following table indicates the gain or loss recognized in income on derivatives for the periods indicated: For the years ended December 31, 2020 2019 2018 Non-hedging swap derivatives: Decrease in other income $ (700) (63) (288) Increase in mortgage banking income 6,867 — — Hedging interest rate derivatives: Increase/(decrease) in interest expense (35) — 949

Selected Quarterly Financial Da

Selected Quarterly Financial Data - Unaudited	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data - Unaudited	Selected Quarterly Financial Data - Unaudited Quarters ended March 31, 2020 June 30, 2020 September 30, 2020 December 31, 2020 (In thousands, except per share data) Interest income $ 100,378 108,547 113,414 111,729 Interest expense 13,150 10,469 9,880 8,841 Net interest income 87,228 98,078 103,534 102,888 Provision for credit losses 27,637 51,750 6,818 (2,230) Noninterest income 27,976 35,496 36,670 32,123 Noninterest expense 78,611 89,163 86,869 92,849 Income/(loss) before income taxes 8,956 (7,339) 46,517 44,392 Income tax expense/(benefit) 1,017 (1,139) 8,467 9,327 Net income/(loss) $ 7,939 (6,200) 38,050 35,065 Basic earnings/(loss) per share $ 0.08 (0.05) 0.30 0.28 Diluted earnings/(loss) per share $ 0.07 (0.05) 0.30 0.28 Quarters ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 (In thousands, except per share data) Interest income $ 100,289 106,807 106,866 103,418 Interest expense 12,307 14,204 15,930 14,473 Net interest income 87,982 92,603 90,936 88,945 Provision for credit losses 6,467 4,667 3,302 8,223 Noninterest income 21,662 23,363 26,169 28,213 Noninterest expense 71,424 77,512 70,596 76,571 Income before income taxes 31,753 33,787 43,207 32,364 Income tax expense 6,709 7,404 9,793 6,773 Net income $ 25,044 26,383 33,414 25,591 Basic earnings per share $ 0.24 0.25 0.32 0.24 Diluted earnings per share $ 0.24 0.25 0.31 0.24 Quarters ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 (In thousands, except per share data) Interest income $ 89,533 92,875 95,605 97,768 Interest expense 7,766 8,649 9,788 10,937 Net interest income 81,767 84,226 85,817 86,831 Provision for credit losses 4,209 5,349 6,982 3,792 Noninterest income 21,788 24,109 22,557 23,248 Noninterest expenses 67,421 69,787 66,617 72,273 Income before income taxes 31,925 33,199 34,775 34,014 Income tax expense 6,940 6,900 7,035 7,547 Net income $ 24,985 26,299 27,740 26,467 Basic earnings per share $ 0.25 0.26 0.27 0.26 Diluted earnings per share $ 0.24 0.25 0.27 0.26

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Northwest Bancshares, Inc., a Maryland corporation headquartered in Warren, Pennsylvania, is the federal savings and loan holding company for its wholly owned subsidiary, Northwest Bank. Northwest Bank, a Pennsylvania chartered savings bank, offers personal and business deposit and loan products as well as investment management and insurance services through its 170 banking locations in Pennsylvania, New York, Ohio, and Indiana. We have determined that we have one reportable business segment.
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries after elimination of all intercompany accounts and transactions.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the statements of financial condition and cash flows, cash and cash equivalents include cash and amounts due from banks, interest-bearing deposits in other financial institutions, federal funds sold, and other short-term investments with original maturities of three months or less.
Marketable Securities	Marketable Securities We classify marketable securities at the time of purchase as held-to-maturity, available-for-sale, or trading. Securities for which management has the intent and ability to hold until maturity are classified as held-to-maturity and are carried at cost, adjusted for amortization of premiums and accretion of discounts on a level yield basis (amortized cost). If it is management’s intent at the time of purchase to hold securities for an indefinite period of time and/or to use such securities as part of its asset/liability management strategy, the securities are classified as available-for-sale and are carried at fair value, with unrealized gains and losses reported as accumulated other comprehensive income/(loss), a separate component of shareholders’ equity, net of tax. Securities classified as available-for-sale include securities that may be sold in response to changes in interest rates, resultant prepayment risk, or other market factors. Securities that are bought and held principally for the purpose of selling them in the near term are classified as trading and are reported at fair value, with changes in fair value included in earnings. The cost of securities sold is determined on a specific identification basis. We held no securities classified as trading at or during the years ended December 31, 2020 and 2019. On a quarterly basis, we measure expected credit losses on held-to-maturity debt securities on a collective basis by major security type and all of our held-to-maturity debt securities are residential mortgage-backed securities. Accrued interest receivable on held-to-maturity debt securities totaled $1.8 million and $1.5 million at December 31, 2020 and December 31, 2019, respectively, and is excluded from estimated credit losses. All of our residential mortgage-backed securities are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. For available-for-sale debt securities in an unrealized loss position, on at least a quarterly basis, we review our investments for impairment. An investment security is deemed impaired if the fair value of the investment is less than its amortized cost. We consider both our intent to sell and the likelihood that we will not have to sell the investment securities before recovery of their amortized cost basis during our evaluation. If we intend to sell the investment security or if it is more likely than not that we will be required to sell the investment security, the entire impairment is recorded in earnings. For available-for-sale debt securities that do not meet this criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment we consider the issuer of the securities and their creditworthiness, any changes to the rating of the security and any adverse conditions specifically related to the security, among other factors. Also, we may evaluate the business and financial outlook of the issuer, as well as broader economic performance indicators. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security is compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the allowance when we believe the uncollectibility of an available-for-sale security is confirmed or when there is an intent or requirement to sell the security. Accrued interest receivable on available-for-sale debt securities totaled $1.9 million and $900,000 at December 31, 2020 and December 31, 2019, respectively, and is excluded from the estimate of credit losses. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days past due. The receivable for interest income that is accrued but not collected is reversed against interest income when the debt security is placed on nonaccrual status.
Loans Receivable	Loans Receivable Our portfolio segments are based on the class of financing receivable. Additionally, the class of financing receivables are based on several factors including the method for monitoring and assessing credit risk and the risk characteristics of the financing receivables. Based on evaluation of the nature of our financing receivables, along with the nature and extent of exposure to credit risk arising from these receivables, our portfolio segments were determined to be Personal Banking and Business Banking loans. • Personal Banking loans consist of the following classes of financing receivables: ◦ Residential mortgage loans - fixed and adjustable rate mortgage loans ◦ Home equity loans - first and second mortgage loans and home equity lines of credit ◦ Vehicle loans - direct and indirect automobile and motorcycle loans ◦ Consumer loans - unsecured lines of credit, credit card loans, and other consumer loans • Business Banking loans consist of the following classes of financing receivables: ◦ Commercial real estate - multi-family commercial real estate loans are secured by multi-family residences, such as rental properties and loans secured by nonresidential properties such as hotels, commercial offices, medical buildings, manufacturing facilities and retail establishments, excluding owner-occupied loans, and including small business commercial real estate loans ◦ Commercial real estate - owner-occupied loans - commercial real estate loans secured by residential or non-residential properties ◦ Commercial loans - other commercial loans, including small business commercial loans Loans are reported at amortized cost. Amortized cost is the principal balance outstanding, net of any deferred purchased premiums and discounts, deferred origination fees or costs and the allowance for credit losses. Accrued interest receivable totaled $31.7 million and $23.3 million at December 31, 2020 and December 31, 2019, respectively, and was reported in accrued interest receivable on the Consolidated Statements of Financial Position. Accrued interest receivable is excluded from the amortized cost basis of loans and from the estimate of allowance for credit losses, except for loans that received six-month deferrals as a result of COVID-19. Accrued interest receivable on loans that received six-month deferrals was $4.4 million at December 31, 2020 . Interest income on loans is credited to income as earned. Interest earned on loans for which no payments were received during the month is accrued at month end. Accrued interest on loans more than 90 days delinquent is reversed and such loans are placed on nonaccrual status. All loans are placed on nonaccrual status when principal or interest is 90 days or more delinquent or when there is reasonable doubt that interest or principal will not be collected in accordance with the contractual terms. Interest receipts on all nonaccrual loans are recognized as interest income when it has been determined that all principal and interest will be collected or are applied to principal when collectability of contractual principal is in doubt. Nonaccrual loans generally are restored to an accrual basis when principal and interest become current and a period of performance has been established in accordance with the contractual terms, typically six months. A loan is considered to be a troubled debt restructuring loan ("TDR") when the borrower is experiencing financial difficulties and the restructuring constitutes a concession. TDRs may include modifications of terms of loans, receipts of assets from borrowers in partial or full satisfaction of loans, or a combination thereof. A modified loan is determined to be a TDR based on the contractual terms as specified by the original loan agreement or the most recent modification. Once classified as a TDR, a loan is removed from such classification under three circumstances: (1) the loan is paid off, (2) the loan is charged off, or (3) if, at the beginning of the current fiscal year, the loan has performed in accordance with the modified terms for a minimum of six consecutive months and at the time of modification the loan’s interest rate represented a then current market interest rate for a loan of similar risk. Loan delinquency is measured based on the number of days since the payment due date. Past due status is measured using the loan’s contractual maturity date. Personal Banking loans are charged-off or charged down when they become 180 days delinquent, unless the borrower has filed for bankruptcy. Business Banking loans are charged-off or charged down when, in our opinion, they are no longer collectible or when it has been determined that the collateral value no longer supports the carrying value of the loan for loans that are collateral dependent. Loan fees and certain direct loan origination costs are deferred and the net deferred fee or cost is then recognized using the level-yield method over the contractual life of the loan as an adjustment to interest income. We identify certain residential mortgage loans which will be sold prior to maturity, as loans held-for-sale. These loans are recorded at fair value less estimated cost to sell. At December 31, 2020 and 2019, there were $58.8 million and $7.7 million of residential mortgage loans classified as held-for-sale, respectively. Acquired loans that are not considered p urchased with credit deterioration (" PCD") are initially measured at fair value with no carryover of the related allowance for credit losses. Determining the fair value of the loans involves estimating the amount and timing of principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Acquired loans may be classified as PCD loans upon acquisition if they have experienced more than insignificant credit deterioration since origination. Loans are considered to have experienced more than insignificant credit deterioration if they are greater than 30 days past due, classified special mention or worse or on nonaccrual status. An allowance for credit losses on day 1 is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The allowance is recognized on day 1 by adding it to the fair value of the loan, which is the “Day 1 amortized cost”. There is no credit loss expense recognized on PCD loans because the initial allowance is established by grossing-up the amortized cost of the PCD loan. 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 allowance for credit losses are recorded through provision expense.
Allowance for Loan Losses and Provision for Loan Losses	Allowance for Credit Losses and Provision for Credit Losses The allowance for credit losses is deducted from, or added to, the loan’s amortized cost basis to present the net amount expected to be collected on our lending portfolios. We estimate the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Loans are charged off against the allowance when we believe the uncollectibility of a loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Expected credit losses are estimated over the contractual term of the loans, adjusted for prepayments. The contractual term excludes expected extensions, renewals and modifications unless we had a reasonable expectation at the reporting date that a TDR will be executed for an individual borrower or the extension or renewal option is included in the contract and is not unconditionally cancellable by the Company. Credit card receivables do not have stated maturities. In determining the estimated life of a credit card receivable, we first estimate the future cash flows expected to be received and then apply those expected future cash flows to the credit card balance. Expected credit losses for credit cards are determined by estimating the amount and timing of principal payments expected to be received as payment for the balance outstanding as of the reporting date and applying those principal payments against the balance outstanding as of the reporting period until the expected payments have been fully allocated. The allowance for credit losses is recorded for the excess of the balance outstanding as of the reporting period over the expected principal payments. The allowance for credit losses is measured on a collective ("pool") basis when similar risk characteristics exist. For the purpose of calculating portfolio-level reserves, we have grouped our loans into seven segments: residential mortgage loans, home equity loans, vehicle loans, consumer loans, commercial real estate loans, commercial real estate owner-occupied and commercial loans. The allowance for credit losses is measured at the pool level utilizing loan-level inputs wherever possible. We use a twelve-month forecasting period and revert to historical average loss rates thereafter. The reasonable and supportable forecast is based on a probability-weighted multiple economic scenario approach and obtained from a third party vendor. Reversion to the mean takes place over a twelve-month period. Our loss rate models utilize a linear reversion method. For our Probability of Default ("PD")/Loss Given Default ("LDG") models we revert the PD utilizing exponential reversion, which is an accelerated method, and the LGD utilizing a linear reversion method. Historical average loss rates are calculated using historical data beginning in 2009 through the current period. As part of the analysis as of December 31, 2020, we considered the most recent economic conditions and forecasts available which incorporated the impact of COVID-19. The ACL increased in the period largely attributable to COVID-19. Mortgage and Home Equity Loans The allowance for credit losses within the mortgage and home equity loan classes is calculated at the pool-level using a non-discounted cash flow method through a PD and LGD model developed by an external third-party. These classes are further divided into smaller pools of loans with similar risk characteristics such as: lines versus loans, fixed versus variable, senior lien position versus junior lien position, among other things. For each pool, the models project default rates, prepayment rates, and severity rates. The models accept as inputs key risk drivers such as: current balance, original credit bureau score, original loan-to-value ratio, type of collateral, location of collateral, delinquency status, loan age, among other characteristics. They also utilize macroeconomic forecasts of home price indices, unemployment rates, gross domestic product, and others. Vehicle Loans The allowance for credit losses within the vehicle loan portfolio is calculated at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. The allowance for vehicle loans utilizes a vintage analysis to project portfolio-level net charge-off rates. The class is further divided into short term versus long term loans, prime versus subprime borrowers, and origination vintage. This model uses current balance, original credit bureau score, original debt-to-income ratio, loan term, loan age, and other product characteristics as key risk drivers. The model used for vehicle loans is not natively sensitive to macroeconomic conditions. The necessary adjustments to account for current and expected macroeconomic conditions is captured via our qualitative adjustment framework. Consumer Loans The allowance for credit losses within the consumer loan portfolio is calculated at the portfolio-level using a non-discounted cash flow method through a suite of loss rate models developed internally with the assistance of an external third-party. This class of financing receivables is further divided into credit cards, unsecured lines of credit and other consumer loans. The allowance for credit losses for credit cards and unsecured lines of credit is calculated using two transition matrix models to project portfolio-level net charge-off rates. Both models use current balance and delinquency status as key risk drivers. These models are not natively sensitive to macroeconomic conditions. The necessary adjustments to account for current and expected macroeconomic conditions is captured via our qualitative adjustment framework. For other consumer loans, a regression model is used to project portfolio-level net charge-off rates. This model uses borrower information and macroeconomic forecasts as key inputs. Commercial Real Estate Loans The commercial real estate loan class is further segmented into smaller pools of loans with similar risk characteristics, commercial real estate loans and small business commercial real estate loans. The allowance for credit losses for the commercial real estate loan portfolio is calculated at the pool level using a non-discounted cash flow method through a PD/LGD model developed by an external third-party. This model projects default and severity rates. The model accepts as inputs key risk drivers such as: current balance, original loan-to-value-ratio, type of collateral, location of collateral, delinquency status, loan age, obligor financial statement information, and expected prepayment rates, among other characteristics. It also utilizes macroeconomic forecasts of commercial real estate price indices, unemployment rates, gross domestic product and others. The allowance for credit losses is calculated for commercial real estate small business loans at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. A regression model is used to project portfolio-level net charge-off rates. This model uses loan characteristics and macroeconomic forecasts as key inputs. Commercial Loans and Commercial Real Estate - Owner Occupied Loans The allowance for credit losses for the commercial loan portfolio and the commercial real estate - owner occupied loan portfolio is calculated at the pool level using a non-discounted cash flow method through a PD/LGD model developed by an external third-party. The commercial loan class is further segmented into smaller pools of loans with similar risk characteristics, commercial loans and commercial small business loans. The commercial loan portfolio and the commercial real estate owner occupied loan portfolio models project default and severity rates. The model accepts as inputs key risk drivers such as the obligor financial statement information, collateral type, the obligor’s primary industry, expected prepayment rates, among other characteristics. It also utilizes macroeconomic forecasts of unemployment rates, gross domestic product, corporate bond spreads, and others. The allowance for credit losses for commercial small business loans is calculated at the portfolio-level using a non-discounted cash flow method through a loss rate model developed internally with the assistance of an external third-party. A regression model is used to project portfolio-level net charge-off rates. This model uses loan characteristics and macroeconomic forecasts as key inputs. Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When we determine that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs. If this criteria is not met, a discounted cash flow method is used to determine the allowance for credit losses. All changes in the discounted cash flow method over time are reported in the allowance for credit losses. The allowance calculation is also supplemented with qualitative reserves that takes into consideration the current portfolio and specific risk characteristics, such as changes in underwriting standards, portfolio mix, delinquency level, or term, as well as changes in environmental conditions, among other factors, that have occurred but are not yet reflected in the quantitative model component. The allowance for credit losses on a TDR is measured using the same method as all other loans held for investment, except when the value of the concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit losses is determined by discounting the expected future cash flows at the original interest rate of the loan. For off-balance-sheet credit exposures, we estimate expected credit losses over the contractual period in which we are exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable. The liability for credit losses on off-balance-sheet credit exposures is adjusted through a provision for credit loss expense and is included within "other expenses". We estimate the liability balance using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. The estimate includes a consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Off-balance-sheet exposures that are not unconditionally cancellable have been identified for the home equity, commercial real estate, and commercial loan portfolios. Results for reporting periods beginning after January 1, 2020 are presented under CECL methodology while prior period amounts continue to be reported in accordance with Accounting Standards Codification (“ASC”) Topic 450, Contingencies; and specific reserves based upon ASC Topic 310, Receivables. ASC Topic 450 applies to homogeneous loan pools such as commercial loans, consumer lines of credit and residential mortgages that are not individually evaluated for impairment. ASC Topic 310 is applied to commercial and consumer loans that are individually evaluated for impairment.
Real Estate Owned	Real Estate Owned Real estate owned is comprised of property either acquired through foreclosure or voluntarily conveyed by borrowers. These assets are recorded on the date acquired at the lower of the loan balance or fair value of the collateral, less estimated disposition costs, with the fair value being determined by an appraisal. Any initial write-down is charged to the allowance for credit losses. Subsequently, foreclosed assets are valued at the lower of the amount recorded at acquisition date or the current fair value, less estimated disposition costs. Any subsequent write-down or gains or losses realized from the disposition of such property are credited or charged to noninterest income.
Restricted Investment in Federal Home Loan Bank Stock	Restricted Investment in FHLB StockFederal law requires a member institution of the FHLB system to hold stock of its district FHLB according to a predetermined formula. FHLB stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. FHLB stock can only be purchased, redeemed and transferred at par value. Dividends are reported in interest income in the Consolidated Statements of Income.
Premises and Equipment	Premises and Equipment Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation is accumulated on a straight-line basis over the estimated useful lives of the related assets. Estimated lives range from three
Goodwill	Goodwill Goodwill is generated from the premium paid for an acquisition and is allocated to reporting units, which are either our reportable segments or one level below. Reporting units are identified based upon analyzing each individual operating segment. A reporting unit is defined as a distinct, separately identifiable component of an operating segment for which complete, discrete financial information is available that management regularly reviews. Goodwill is not subject to amortization but is tested for impairment at least annually and possibly more frequently if certain events occur or changes in circumstances arise. In testing goodwill for impairment, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If, after assessing all events and circumstances, we determine it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test would be unnecessary. However, if we conclude otherwise, it would then be required to perform the first step of the goodwill impairment test and continue to the second step, if necessary. Step 1 requires the fair value of each reporting unit be compared to its carrying amount, including goodwill. Determining the fair value of a reporting unit requires a high degree of subjective judgment, including developing cash flow projections, selecting appropriate discount rates, identifying relevant market comparables, incorporating general economic and market conditions and selecting an appropriate control premium. Quarterly, the Company evaluates whether there are any triggering events that would require an update to our previous goodwill assessment. During the first quarter of 2020, the Company determined the COVID-19 pandemic and its negative effect on the global economy to be a triggering event. As a result, the Company, with the assistance of a third-party specialist, performed a quantitative impairment analysis in accordance with ASU 2017-04 as of March 31, 2020. This analysis indicated the aggregate fair value of Northwest Bank, the sole reporting unit of Northwest Bancshares, Inc., exceeded the carrying value and therefore goodwill
Core Deposit and Other Identifiable Intangibles	Core Deposit and Other Identifiable Intangibles Through the assistance of an independent third party, we analyze and prepare a core deposit study for all bank acquisitions or other identifiable intangible asset study, such as customer lists, for all non-bank acquisitions. The core deposit study reflects the cumulative present value benefit of acquiring deposits versus an alternative source of funding. The other identifiable intangible asset study reflects the cumulative present value benefit of acquiring the income stream from an existing customer base versus developing new business relationships. Based upon analysis, the amount of the premium related to the core deposits or other identifiable intangibles of the business purchased is calculated along with the estimated life of the intangible. The intangible, which is recorded in other intangible assets, is then amortized to expense on an accelerated basis over an approximate life of typically between seven
Bank-Owned Life Insurance	Bank-Owned Life Insurance We own insurance on the lives of a certain group of current and former employees and director's. The policies were purchased to help offset the increase in the costs of various benefit plans, including healthcare, as well as the directors deferred compensation plan. The cash surrender value of these policies is included as an asset on the Consolidated Statements of Financial Condition and any increases in the cash surrender value are recorded as tax-free noninterest income on the Consolidated Statements of Income. In the event of the death of an insured individual covered by these policies, after distribution to the insured’s beneficiaries, if any, we receive a tax-free death benefit, which is recorded as noninterest income.
Deposits	Deposits Interest on deposits is accrued and charged to expense monthly and is paid or credited in accordance with the terms of the accounts.
Revenue Recognition	Revenue Recognition Revenue that is not associated with our financial assets and financial liabilities is recognized when performance obligations under the terms of a contract with our customers are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The majority of our revenue continues to be recognized at the point in time when the services are provided to our customers.
Pension Plans	Pension Plans We maintain multiple noncontributory defined benefit pension plans for substantially all of our employees. The net periodic pension cost has been calculated using service cost, interest cost, expected returns on plan assets and net amortization. The other components of the net periodic benefit cost are included in other expense on the Consolidated Statement of Income and are reported separately from the service costs.
Income Taxes	Income Taxes We join with our wholly owned subsidiaries in filing a consolidated federal income tax return. In accordance with an intercompany tax allocation agreement, the applicable federal income tax expense or benefit is allocated to each subsidiary based upon taxable income or loss calculated on a separate company basis. Each subsidiary is responsible for payment of its own federal income tax liability or receives reimbursement of federal income tax benefit. In addition, deferred taxes are calculated and maintained on a separate company basis. We account for income taxes under the asset and liability method. The objective of the asset and liability method is to establish deferred tax assets and liabilities for temporary differences between the financial reporting and tax basis of our assets and
Stock-Related Compensation	Stock-Related Compensation We determine the fair value of each option award, estimated on the grant date, using the Black-Scholes-Merton option-pricing model. The Black-Scholes-Merton option-pricing model uses variables including expected volatilities, expected term, risk-free discount rate and annual rate of quarterly dividends. Expected volatilities are based on historical volatility of the Company’s stock. The expected terms are based upon actual exercise and forfeiture experience of previous option grants. The risk-free rate is based on yields on U.S. Treasury securities of a similar maturity to the expected term of the options. For options outstanding at December 31, 2020, the following assumptions were used to determine the option's fair value: (1) annual rate of quarterly dividends ranging from 3.2% to 7.5% based on historical dividends and market prices; (2) expected volatility of 13.0% to 22.0% based on historical average monthly volatility; (3) risk-free discount rates ranging from 0.7% to 3.1%; and (4) expected lives of seven
Derivative financial instruments	Derivative Financial Instruments We recognize all derivative financial instruments as either assets or liabilities in the balance sheet and measure those instruments at fair value. The accounting for changes in the fair value of a derivative depends on the intended use of the derivative and the resulting designation. An entity that elects to use hedge accounting is required, at inception, to establish the method it will use for assessing the effectiveness of the hedging derivative and the measurement approach for determining the ineffective aspect of the hedge. Those methods must be consistent with our approach to managing risk.
Off-Balance-Sheet Instruments	Off-Balance-Sheet Instruments In the normal course of business, we extend credit in the form of loan commitments, undisbursed lines of credit, and standby letters of credit. These off-balance-sheet instruments involve, to various degrees, elements of credit and interest rate risk not reported in the Consolidated Statement of Financial Condition. We utilize the same underwriting standards for these instruments as other extensions of credit.
Use of Estimates	Use of EstimatesThe preparation of financial statements, in conformity with accounting principles generally accepted in the United States of America, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amount of revenues and expenses during the reporting period. The estimates and assumptions that we deem important to our financial statements relate to the allowance for loan losses, the accounting treatment and valuation of our investment securities portfolio, the analysis of the carrying value of goodwill, pension and income taxes. These estimates and assumptions are based on management’s best estimates and judgment and we evaluate them using historical experience and other factors, including the current economic environment. We adjust our estimates and assumptions when facts and circumstances dictate. As future events cannot be determined, actual results could differ significantly from our estimates.
Reclassification of Prior Years' Statements	Reclassification of Prior Years’ Statements Certain items previously reported have been reclassified to conform with the current year’s reporting format.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards On January 1, 2020, the Company adopted Accounting Standards Update ("ASU") 2016-13, " Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments , which eliminated the probable initial recognition threshold for credit losses and instead requires that all financial assets (or group of financial assets) measured at amortized cost be presented at the net amount expected to be collected inclusive of the entity’s current estimate of all lifetime expected credit losses. This guidance also applies to certain off-balance-sheet credit exposures such as unfunded commitments and non-derivative financial guarantees. In addition, ASC 326 made changes to the accounting for available-for-sale debt securities. ASC 326 requires credit losses to be presented as an allowance, rather than a write-down, on available-for-sale debt securities management does not intend to sell or believes that it is more likely than not they will be required to sell. We adopted ASC 326 using the modified retrospective transition approach for all financial assets measured at amortized cost and off-balance-sheet credit exposures. As a result, the Company was not required to adjust its comparative period financial information for effects of the standard or make the new required ASC 326 disclosures for periods before the date of adoption (i.e., January 1, 2020). As a result of the adoption of ASU 2016-13, or CECL, we recognized an increase to the allowance for credit losses of $10.8 million, an increase to our reserve for off-balance sheet exposures of $2.3 million, an increase in deferred tax assets of $2.9 million and a cumulative-effect adjustment to retained earnings of $9.6 million, net of taxes, on the Consolidated Statements of Financial Condition as of January 1, 2020, with no impact on our Consolidated Statement of Income or Consolidated Statement of Cash Flows. Additionally, the adoption of CECL did not materially impact our held-to-maturity or our available-for-sale securities portfolio, which are primarily comprised of agency-backed mortgage securities. We also adopted ASC 326 using the prospective transition approach for financial assets PCD that were previously classified as purchased credit impaired (PCI) and accounted for under ASC 310-30. In accordance with ASC 326, we did not reassess whether PCI assets met the criteria for PCD assets as of the date of adoption. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $517,000 of allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, 2020. We have elected to phase the estimated impact of CECL into regulatory capital in accordance with the interim final rule of the Board of Governors of the Federal Reserve System (FRB) and other U.S. banking agencies that became effective on March 31, 2020. As a result, we will delay recognizing the estimated impact of CECL on regulatory capital until after a two-year deferral period, which for us extends through December 31, 2021. Beginning on January 1, 2022, we will be required to phase in 25% of the previously deferred estimated capital impact of CECL, with an additional 25% to be phased in at the beginning of each subsequent year until fully phased in by the first quarter of 2025. Under the interim final rule, the estimated impact of CECL on regulatory capital that we will defer and later phase in is calculated as the entire day-one impact at adoption plus 25% of the subsequent change in allowance during the two-year deferral period. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This guidance removes, modifies and adds disclosure requirements for fair value measurements. On January 1, 2020, the Company adopted ASU 2018-13 on a prospective basis for the new and modified disclosures, and on a retrospective basis for disclosures that have been eliminated. The adoption of this standard did not have any effect on our results of operations or financial position. Refer to Note 17, "Disclosures About Fair Value of Financial Instruments". In August 2018, the FASB issued ASU 2018-15, “ Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” This guidance aligns the requirements for capitalization of implementation costs incurred in a hosting arrangement that is a service contract with the existing guidance for internal-use software. On January 1, 2020, the Company adopted ASU 2018-15 on a prospective basis which will be applied to relevant implementation costs incurred after the date of adoption. The adoption of this standard is not expected to have a material prospective impact on our financial statements.

Acquisition (Tables)

Acquisition (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Schedule of recognized identified assets acquired and liabilities assumed	The following table shows the assets acquired and the liabilities assumed that were recorded at fair value on the date of acquisition: Consideration paid: Northwest Bancshares, Inc. common stock issued $ 213,406 Total consideration paid 213,406 Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value (1) Cash and cash equivalents $ 261,712 Investment securities available-for-sale 126,854 Loans, net 1,508,141 FHLB stock 13,115 Premises and equipment 19,094 Core deposit intangible 3,717 Other assets 121,790 Deposits (1,617,039) Borrowings (232,200) Junior subordinated debentures (6,804) Other liabilities (21,150) Total identifiable net assets $ 177,230 Goodwill $ 36,176 (1) Amounts are estimates and subject to adjustment. Actual amounts are not expected to differ materially from the amounts shown.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease, cost	The components of lease cost recognized within our Consolidated Statements of Income were as follows: For the years ended December 31, 2020 2019 Operating lease costs (office operations) $ 6,139 5,603 Variable lease costs (office operations) 680 596 Total operating lease costs $ 6,819 6,199 Other information related to leases as were as follows: For the years ended December 31, 2020 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 6,204 5,564 ROU assets obtained in exchange for lease obligations $ 8,657 13,268 Weighted average remaining lease term 15.1 years 15.7 years Weighted average discount rate 3.4 % 3.7 %
Assets and liabilities, lessee	Amounts reported in the Consolidated Statements of Financial Condition were as follows: For the years ended December 31, 2020 2019 Operating leases: Operating lease ROU assets (other assets) $ 48,329 49,380 Operating lease liabilities (other liabilities) 52,206 52,092
Lessee, operating lease, liability, maturity	Maturities of lease liabilities by fiscal year for our operating leases are as follows: As of December 31, 2020 2021 $ 6,079 2022 5,681 2023 5,403 2024 4,731 2025 4,521 Thereafter 41,882 Total lease payments 68,297 Less amount of lease payments representing interest 16,091 Total present value of lease payments $ 52,206 As of December 31, 2019 2020 $ 5,692 2021 5,362 2022 5,042 2023 4,734 2024 4,408 Thereafter 44,758 Total lease payments 69,996 Less amount of lease payments representing interest 17,904 Total present value of lease payments $ 52,092

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of the portfolio of investment securities available-for-sale	Marketable securities available-for-sale at December 31, 2020 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due after ten years $ 40,761 211 (55) 40,917 Debt issued by government sponsored enterprises: Due in less than one year 24,976 159 — 25,135 Due in one year through five years 238 3 — 241 Due in five years through ten years 68,973 238 (80) 69,131 Municipal securities: Due in less than one year 4,008 14 — 4,022 Due in one year through five years 2,803 63 (2) 2,864 Due in five years through ten years 16,045 429 (5) 16,469 Due after ten years 89,778 3,752 (72) 93,458 Residential mortgage-backed securities: Fixed rate pass-through 339,406 7,125 (86) 346,445 Variable rate pass-through 14,778 431 (20) 15,189 Fixed rate agency CMOs 723,586 11,758 (1,093) 734,251 Variable rate agency CMOs 50,333 519 (33) 50,819 Total residential mortgage-backed securities 1,128,103 19,833 (1,232) 1,146,704 Total marketable securities available-for-sale $ 1,375,685 24,702 (1,446) 1,398,941 Marketable securities available-for-sale at December 31, 2019 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due in less than one year $ 14,951 40 — 14,991 Debt issued by government sponsored enterprises: Due in less than one year 50,777 345 — 51,122 Due in one year through five years 50,229 — (227) 50,002 Due after ten years 3,716 53 (109) 3,660 Municipal securities: Due in less than one year 809 4 — 813 Due in one year through five years 2,891 79 — 2,970 Due in five years through ten years 10,155 148 — 10,303 Due after ten years 11,695 267 — 11,962 Corporate debt issues: Due in five years through ten years 919 — — 919 Residential mortgage-backed securities: Fixed rate pass-through 142,421 1,941 (881) 143,481 Variable rate pass-through 18,933 749 (4) 19,678 Fixed rate agency CMOs 452,256 3,518 (1,606) 454,168 Variable rate agency CMOs 55,743 207 (118) 55,832 Total residential mortgage-backed securities 669,353 6,415 (2,609) 673,159 Total marketable securities available-for-sale $ 815,495 7,351 (2,945) 819,901
Schedule of the portfolio of investment securities held-to-maturity	Marketable securities held-to-maturity at December 31, 2020 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Debt issued by the U.S. government and agencies: Due in five years through ten years $ 67,990 12 (123) 67,879 Residential mortgage-backed securities: Fixed rate pass-through 1,723 131 — 1,854 Variable rate pass-through 919 30 — 949 Fixed rate agency CMOs 107,651 716 (2) 108,365 Variable rate agency CMOs 604 15 — 619 Total residential mortgage-backed securities 110,897 892 (2) 111,787 Total marketable securities held-to-maturity $ 178,887 904 (125) 179,666 Marketable securities held-to-maturity at December 31, 2019 are as follows: Amortized cost Gross unrealized Gross unrealized Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,197 83 — 2,280 Variable rate pass-through 1,210 28 — 1,238 Fixed rate agency CMOs 14,016 68 — 14,084 Variable rate agency CMOs 613 8 — 621 Total residential mortgage-backed securities 18,036 187 — 18,223 Total marketable securities held-to-maturity $ 18,036 187 — 18,223
Information regarding the issuers and the carrying values of the entity's mortgage-backed securities	The following table presents information regarding the issuers and the carrying values of our mortgage-backed securities at December 31, 2020 and 2019: December 31, 2020 2019 Residential mortgage-backed securities: FNMA $ 532,532 280,832 GNMA 367,354 231,491 FHLMC 357,249 178,375 Other (including non-agency) 466 497 Total residential mortgage-backed securities $ 1,257,601 691,195
Schedule of the fair value and gross unrealized losses on investment securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position	The following table shows the fair value and gross unrealized losses on investment securities, for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2020: Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ 67,809 (179) 1,923 (80) 69,732 (259) Municipal securities 4,257 (79) — — 4,257 (79) Residential mortgage-backed securities 300,767 (1,202) 5,533 (31) 306,300 (1,233) Total temporarily impaired securities $ 372,833 (1,460) 7,456 (111) 380,289 (1,571) The following table shows the fair value and gross unrealized losses on investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2019: Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ — — 52,620 (336) 52,620 (336) Residential mortgage-backed securities 173,112 (858) 109,324 (1,751) 282,436 (2,609) Total temporarily impaired securities $ 173,112 (858) 161,944 (2,087) 335,056 (2,945)
Debt Securities, Held-to-maturity, Credit Quality Indicator	The following table presents the credit quality for our held-to-maturity securities, based on the latest information available as of December 31, 2020. The credit ratings are sourced from nationally recognized rating agencies, including Moody's and S&P, or when credit ratings cannot be sourced from the agencies, they are presented based on asset type. All of our held-to-maturity securities were current in their payment of principal and interest as of December 31, 2020. AA+ Total Held-to-maturity securities: Debt issued by the U.S. government-sponsored agencies $ 67,990 67,990 Residential mortgage-backed securities 110,897 110,897 Total marketable securities held-to-maturity $ 178,887 178,887

Loans Receivable (Tables)

Loans Receivable (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Summary of loans receivable	The following table shows a summary of our loans receivable at amortized cost basis at December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 December 31, 2019 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,753,593 314,528 3,068,121 2,785,189 82,938 2,868,127 Home equity loans 1,175,703 292,033 1,467,736 1,099,514 243,404 1,342,918 Vehicle loans 995,040 157,633 1,152,673 850,804 10,388 861,192 Consumer loans 288,066 67,254 355,320 238,343 25,597 263,940 Total Personal Banking 5,212,402 831,448 6,043,850 4,973,850 362,327 5,336,177 Commercial Banking: Commercial real estate loans 2,223,108 624,873 2,847,981 1,915,949 312,160 2,228,109 Commercial real estate loans - owner occupied 344,016 153,892 497,908 433,099 93,182 526,281 Commercial loans 1,019,482 171,628 1,191,110 664,159 53,948 718,107 Total Commercial Banking 3,586,606 950,393 4,536,999 3,013,207 459,290 3,472,497 Total loans receivable, gross 8,799,008 1,781,841 10,580,849 7,987,057 821,617 8,808,674 Allowance for credit losses (102,874) (31,553) (134,427) (51,439) (6,502) (57,941) Total loans receivable, net (2) $ 8,696,134 1,750,288 10,446,422 7,935,618 815,115 8,750,733 (1) Includes $58.8 million and $7.7 million of loans held-for-sale at December 31, 2020 and December 31, 2019, respectively. (2) Includes $40.9 million and $40.2 million of net unearned income, unamortized premiums and discounts and deferred fees and costs at December 31, 2020 and December 31, 2019, respectively.
Schedule of the changes in the allowance for losses on loans receivable	The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of December 31, 2020 Current Charge-offs Recoveries Initial ACL Cumulative effect of ASU 2016-13* Balance as of December 31, 2019 Allowance for Credit Losses Personal Banking: Residential mortgage loans $ 7,266 (3,289) (917) 362 1,095 7,441 2,574 Home equity loans 5,992 (3,357) (608) 766 216 5,786 3,189 Vehicle loans 14,825 11,416 (6,827) 1,867 235 842 7,292 Consumer loans 2,871 4,126 (5,831) 1,542 157 (2,424) 5,301 Total Personal Banking 30,954 8,896 (14,183) 4,537 1,703 11,645 18,356 Commercial Banking: Commercial real estate loans 79,381 58,483 (4,240) 1,287 5,720 2,288 15,843 Commercial real estate loans - owner occupied 10,518 2,588 (83) 27 963 1,278 5,745 Commercial loans 13,574 14,008 (16,212) 1,741 459 (4,419) 17,997 Total Commercial Banking 103,473 75,079 (20,535) 3,055 7,142 (853) 39,585 Total $ 134,427 83,975 (34,718) 7,592 8,845 10,792 57,941 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 2 2 — — — — — Home equity loans 35 5 — — — (293) 323 Consumer loans — — — — — (402) 402 Total Personal Banking 37 7 — — — (695) 725 Commercial Banking: Commercial real estate loans 3,449 1,438 — — — 1,934 77 Commercial real estate loans - owner occupied 326 235 — — — 88 3 Commercial loans 2,551 1,459 — — — 923 169 Total Commercial Banking 6,326 3,132 — — — 2,945 249 Total off-balance-sheet exposure $ 6,363 3,139 — — — 2,250 974 * Includes the impact of the initial allowance on PCD loans of $517,000. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of December 31, 2019 Current Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 2,463 (1,089) (935) 433 4,054 Home equity loans 2,830 46 (619) 219 3,184 Consumer loans 12,055 10,025 (11,537) 2,487 11,080 Total Personal Banking 17,348 8,982 (13,091) 3,139 18,318 Commercial Banking: Commercial real estate loans 17,292 (5,241) (5,078) 1,232 26,379 Commercial loans 16,799 12,449 (3,237) 533 7,054 Total Commercial Banking 34,091 7,208 (8,315) 1,765 33,433 Total originated loans 51,439 16,190 (21,406) 4,904 51,751 Acquired loans Personal Banking: Residential mortgage loans 111 184 (231) 75 83 Home equity loans 359 322 (502) 191 348 Consumer loans 538 156 (270) 233 419 Total Personal Banking 1,008 662 (1,003) 499 850 Commercial Banking: Commercial real estate loans 4,296 2,092 (389) 597 1,996 Commercial loans 1,198 3,715 (3,414) 280 617 Total Commercial Banking 5,494 5,807 (3,803) 877 2,613 Total acquired loans 6,502 6,469 (4,806) 1,376 3,463 Total $ 57,941 22,659 (26,212) 6,280 55,214 The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the year ended December 31, 2018, prior to the adoption of ASU 2016-13 (in thousands): Balance as of December 31, 2018 Current Charge-offs Recoveries Balance as of December 31, 2017 Originated loans Personal Banking: Residential mortgage loans $ 4,054 808 (1,067) 489 3,824 Home equity loans 3,184 (25) (1,183) 320 4,072 Consumer loans 11,080 10,869 (15,674) 3,442 12,443 Total Personal Banking 18,318 11,652 (17,924) 4,251 20,339 Commercial Banking: Commercial real estate loans 26,379 11,349 (6,096) 1,215 19,911 Commercial loans 7,054 (2,062) (2,675) 1,469 10,322 Total Commercial Banking 33,433 9,287 (8,771) 2,684 30,233 Total originated loans 51,751 20,939 (26,695) 6,935 50,572 Acquired loans Personal Banking: Residential mortgage loans 83 (61) (112) 125 131 Home equity loans 348 (23) (602) 211 762 Consumer loans 419 (335) (291) 155 890 Total Personal Banking 850 (419) (1,005) 491 1,783 Commercial Banking: Commercial real estate loans 1,996 (467) (1,291) 205 3,549 Commercial loans 617 279 (650) 97 891 Total Commercial Banking 2,613 (188) (1,941) 302 4,440 Total acquired loans 3,463 (607) (2,946) 793 6,223 Total $ 55,214 20,332 (29,641) 7,728 56,795
Schedule of loan portfolio by portfolio segment and by class of financing receivable	The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2020 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 3,068,121 7,266 15,924 — 8,431 560 — Home equity loans 1,467,736 5,992 9,123 — 2,058 381 26 Vehicle loans 1,152,673 14,825 5,533 1 — — — Consumer loans 355,320 2,871 1,031 584 1 — — Total Personal Banking 6,043,850 30,954 31,611 585 10,490 941 26 Commercial Banking: Commercial real estate loans 2,847,981 79,381 44,092 — 18,430 787 471 Commercial real estate loans - owner occupied 497,908 10,518 3,642 — 761 123 — Commercial loans 1,191,110 13,574 23,487 — 2,454 165 362 Total Commercial Banking 4,536,999 103,473 71,221 — 21,645 1,075 833 Total $ 10,580,849 134,427 102,832 585 32,135 2,016 859 (1) Includes $10.7 million of nonaccrual TDRs. The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 2,868,127 2,574 14,476 — 7,550 560 — Home equity loans 1,342,918 3,189 6,745 32 1,973 393 26 Consumer loans 1,125,132 12,593 4,226 — — — — Total Personal Banking 5,336,177 18,356 25,447 32 9,523 953 26 Commercial Banking: Commercial real estate loans 2,754,390 21,588 34,864 — 19,358 1,384 476 Commercial loans 718,107 17,997 8,559 — 3,118 665 64 Total Commercial Banking 3,472,497 39,585 43,423 — 22,476 2,049 540 Total $ 8,808,674 57,941 68,870 32 31,999 3,002 566 (1) Includes $9.0 million of nonaccrual TDRs.
Schedule of the composition of impaired loans by portfolio segment and by class of financing receivable	The following table presents the amortized cost of our loans on nonaccrual status as of the beginning and end of the year ended December 31, 2020 (in thousands): Nonaccrual Nonaccrual loans at December 31, 2020 with an allowance Nonaccrual Loans 90 days Personal Banking: Residential mortgage loans $ 14,476 15,923 — — Home equity loans 6,745 8,872 252 — Vehicle loans 3,147 5,377 156 1 Consumer loans 1,079 1,030 1 584 Total Personal Banking 25,447 31,202 409 585 Commercial Banking: Commercial real estate loans 18,832 27,079 17,013 — Commercial real estate loans - owner occupied 16,032 3,642 — — Commercial loans 8,559 18,069 5,418 — Total Commercial Banking 43,423 48,790 22,431 — Total $ 68,870 79,992 22,840 585 The following table presents the amortized cost basis of collateral-dependent loans by class of loans as of December 31, 2020 (in thousands): Real estate Equipment Other Total Personal Banking: Residential mortgage loans $ 1,269 — — 1,269 Home equity loans 99 — — 99 Total Personal Banking 1,368 — — 1,368 Commercial Banking: Commercial real estate loans 79,392 1,997 1,703 83,092 Commercial loans 3,313 197 11,069 14,579 Total Commercial Banking 82,705 2,194 12,772 97,671 Total $ 84,073 2,194 12,772 99,039 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Nonaccrual Nonaccrual Loans less TDRs less Total Average Interest Personal Banking: Residential mortgage loans $ 12,682 1,794 — 6,817 21,293 19,767 688 Home equity loans 5,635 1,110 — 1,654 8,399 8,571 368 Consumer loans 3,610 616 — — 4,226 3,842 179 Total Personal Banking 21,927 3,520 — 8,471 33,918 32,180 1,235 Commercial Banking: Commercial real estate loans 25,014 9,850 933 10,329 46,126 46,284 1,490 Commercial loans 4,739 3,820 15,916 1,474 25,949 10,179 345 Total Commercial Banking 29,753 13,670 16,849 11,803 72,075 56,463 1,835 Total $ 51,680 17,190 16,849 20,274 105,993 88,643 3,070 The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2019 prior to the adoption of ASU 2016-13 (in thousands): Loans collectively evaluated for impairment Loans individually evaluated for impairment Loans individually evaluated for impairment for which there is a related impairment reserve Related Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,860,026 8,101 8,101 560 — Home equity loans 1,340,944 1,974 1,974 393 — Consumer loans 1,125,123 9 9 3 — Total Personal Banking 5,326,093 10,084 10,084 956 — Commercial Banking: Commercial real estate loans 2,718,855 35,535 29,578 2,679 5,957 Commercial loans 694,424 23,683 18,337 8,127 5,346 Total Commercial Banking 3,413,279 59,218 47,915 10,806 11,303 Total $ 8,739,372 69,302 57,999 11,762 11,303 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2018, prior to the adoption of ASU 2016-13 (in thousands): Nonaccrual Nonaccrual Loans less TDRs less Total Average Interest Personal Banking: Residential mortgage loans $ 12,965 2,883 — 6,660 22,508 20,733 910 Home equity loans 5,996 1,079 — 1,818 8,893 9,075 511 Consumer loans 3,250 1,072 — — 4,322 4,016 235 Total Personal Banking 22,211 5,034 — 8,478 35,723 33,824 1,656 Commercial Banking: Commercial real estate loans 25,509 11,426 8,549 4,435 49,919 41,328 1,599 Commercial loans 3,010 5,091 2,453 2,087 12,641 9,186 507 Total Commercial Banking 28,519 16,517 11,002 6,522 62,560 50,514 2,106 Total $ 50,730 21,551 11,002 15,000 98,283 84,338 3,762
Schedule of the evaluation of impaired loans by portfolio segment and by class of financing receivable	The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2018 prior to the adoption of ASU 2016-13 (in thousands): Loans collectively evaluated for impairment Loans individually evaluated for impairment Loans individually evaluated for impairment for which there is a related impairment reserve Related Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,856,359 8,111 8,111 747 — Home equity loans 1,256,255 2,167 2,167 523 — Consumer loans 859,684 29 29 6 — Total Personal Banking 4,972,298 10,307 10,307 1,276 — Commercial Banking: Commercial real estate loans 2,436,605 35,216 31,830 6,499 3,386 Commercial loans 588,932 8,081 6,738 767 1,343 Total Commercial Banking 3,025,537 43,297 38,568 7,266 4,729 Total $ 7,997,835 53,604 48,875 8,542 4,729
Schedule of troubled debt restructurings (including re-modified TDRs) by portfolio segment and by class of financing receivable	The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands): For the years ended December 31, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 176 $ 31,999 195 $ 33,608 New TDRs 14 1,497 14 3,344 Re-modified TDRs 5 9,693 8 5,678 Net paydowns — (9,806) — (7,806) Charge-offs: Residential mortgage loans — — — — Home equity loans 1 (10) — — Vehicle loans — — — — Commercial real estate loans — — — — Commercial real estate loans - owner occupied — — — — Commercial loans — — 2 (235) Paid-off loans: Residential mortgage loans 2 (330) 5 (225) Home equity loans 5 (44) 9 (196) Vehicle loans — — — — Commercial real estate loans 3 (321) 12 (2,122) Commercial real estate loans - owner occupied 2 (324) — — Commercial loans 7 (219) 5 (47) Ending TDR balance: 170 $ 32,135 176 $ 31,999 Accruing TDRs $ 21,431 $ 22,956 Nonaccrual TDRs 10,704 9,043 The following tables provide information related to TDRs (including re-modified TDRs) by portfolio segment and by class of financing receivable during the periods indicated (in thousands): For the year ended December 31, 2020 Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 90 88 5 Home equity loans 2 86 79 9 Total Personal Banking 3 176 167 14 Commercial Banking: Commercial real estate loans 9 7,365 7,615 311 Commercial real estate loans - owner occupied 1 58 48 8 Commercial loans 5 2,944 408 40 Total Commercial Banking 15 10,367 8,071 359 Total 18 $ 10,543 8,238 373 For the year ended December 31, 2019 Number of Recorded Current Current Personal Banking: Residential mortgage loans 3 $ 297 297 19 Home equity loans 5 171 165 12 Total Personal Banking 8 468 462 31 Commercial Banking: Commercial real estate loans 10 8,333 7,369 613 Commercial loans 4 221 192 21 Total Commercial Banking 14 8,554 7,561 634 Total 22 $ 9,022 8,023 665 For the year ended December 31, 2018 Number of Recorded Current Current Personal Banking: Residential mortgage loans 9 $ 754 749 72 Home equity loans 17 636 610 150 Total Personal Banking 26 1,390 1,359 222 Commercial Banking: Commercial real estate loans 5 3,157 3,114 169 Commercial loans 4 339 342 69 Total Commercial Banking 9 3,496 3,456 238 Total 35 $ 4,886 4,815 460 The following table provides information as of December 31, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 88 — 88 Home equity loans 2 65 — 14 — 79 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 3 65 — 102 — 167 Commercial Banking: Commercial real estate loans 9 — — 7,335 280 7,615 Commercial real estate loans - owner occupied 1 — — 48 — 48 Commercial loans 5 — 111 217 80 408 Total Commercial Banking 15 — 111 7,600 360 8,071 Total 18 $ 65 111 7,702 360 8,238 The following table provides information as of December 31, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 3 $ — — 297 — 297 Home equity loans 5 109 — 56 — 165 Total Personal Banking 8 109 — 353 — 462 Commercial Banking: Commercial real estate loans 10 — 2,541 4,828 — 7,369 Commercial loans 4 37 — 155 — 192 Total Commercial Banking 14 37 2,541 4,983 — 7,561 Total 22 $ 146 2,541 5,336 — 8,023 The following table provides information related to re-modified trouble debt restructurings by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2020 (in thousands): Type of re-modification Number of Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 3 — — 6,652 — 6,652 Commercial real estate loans - owner occupied 1 — — 48 — 48 Commercial loans 1 — — — 80 80 Total Commercial Banking 5 — — 6,700 80 6,780 Total 5 $ — — 6,700 80 6,780 The following table provides information related to re-modified trouble debt restructurings by portfolio segment and class of financing receivable for modifications during the year ended December 31, 2019 (in thousands): Type of modification Number of Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 7 — 219 4,448 — 4,667 Commercial loans 1 — — 38 — 38 Total Commercial Banking 8 — 219 4,486 — 4,705 Total 8 $ — 219 4,486 — 4,705
Schedule of loan delinquencies	The following table provides information related to the amortized cost basis of loan payment delinquencies at December 31, 2020 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Personal Banking: Residential mortgage loans $ 28,797 5,083 14,489 48,369 3,019,752 3,068,121 — Home equity loans 4,763 1,656 8,441 14,860 1,452,876 1,467,736 — Vehicle loans 7,707 1,776 4,599 14,082 1,138,592 1,152,674 1 Consumer loans 2,867 966 1,459 5,292 350,027 355,319 584 Total Personal Banking 44,134 9,481 28,988 82,603 5,961,247 6,043,850 585 Commercial Banking: Commercial real estate loans 6,692 1,615 23,307 31,614 2,816,366 2,847,980 — Commercial real estate loans - owner occupied 4,231 — 1,980 6,211 491,698 497,909 — Commercial loans 6,405 864 7,325 14,594 1,176,516 1,191,110 — Total Commercial Banking 17,328 2,479 32,612 52,419 4,484,580 4,536,999 — Total loans $ 61,462 11,960 61,600 135,022 10,445,827 10,580,849 585 The following table provides information related to loan payment delinquencies at December 31, 2019 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Originated loans Personal Banking: Residential mortgage loans $ 20,447 5,572 11,080 37,099 2,748,090 2,785,189 — Home equity loans 5,119 2,096 4,573 11,788 1,087,726 1,099,514 — Consumer loans 8,969 3,198 3,467 15,634 1,073,513 1,089,147 — Total Personal Banking 34,535 10,866 19,120 64,521 4,909,329 4,973,850 — Commercial Banking: Commercial real estate loans 5,598 1,387 17,959 24,944 2,324,104 2,349,048 — Commercial loans 987 6,360 4,296 11,643 652,516 664,159 — Total Commercial Banking 6,585 7,747 22,255 36,587 2,976,620 3,013,207 — Total originated loans 41,120 18,613 41,375 101,108 7,885,949 7,987,057 — Acquired loans Personal Banking: Residential mortgage loans 2,849 121 1,695 4,665 78,273 82,938 93 Home equity loans 1,350 309 1,115 2,774 240,630 243,404 53 Consumer loans 239 104 144 487 35,498 35,985 1 Total Personal Banking 4,438 534 2,954 7,926 354,401 362,327 147 Commercial Banking: Commercial real estate loans 2,323 303 7,055 9,681 395,661 405,342 — Commercial loans 200 43 443 686 53,262 53,948 — Total Commercial Banking 2,523 346 7,498 10,367 448,923 459,290 — Total acquired loans 6,961 880 10,452 18,293 803,324 821,617 147 Total $ 48,081 19,493 51,827 119,401 8,689,273 8,808,674 147 (1) Represents acquired loans that were originally recorded at fair value upon acquisition. These loans are considered to be accruing because we can reasonably estimate future cash flows and expect to fully collect the carrying value of these loans. Therefore, we are accreting the difference between the carrying value and their expected cash flows into interest income.
Schedule of credit quality indicators	Based on the most recent analysis performed, the amortized cost basis by risk category of loans by class of loans by origination year is as follows as of December 31, 2020 (in thousands): Year to date 2019 2018 2017 2016 Prior Revolving loans Revolving loans converted to term loans Total loans Personal Banking: Residential mortgage loans Pass $ 641,963 418,057 229,477 247,426 215,893 1,289,728 — — 3,042,544 Substandard — 68 1,293 1,674 1,091 21,451 — — 25,577 Total residential mortgage loans 641,963 418,125 230,770 249,100 216,984 1,311,179 — — 3,068,121 Home equity loans Pass 273,076 193,439 94,757 87,717 81,212 219,061 465,453 40,759 1,455,474 Substandard — 210 318 281 876 5,158 3,509 1,910 12,262 Total home equity loans 273,076 193,649 95,075 87,998 82,088 224,219 468,962 42,669 1,467,736 Vehicle loans Pass 448,746 352,661 218,372 70,122 31,197 24,791 — — 1,145,889 Substandard 343 1,958 2,087 1,210 667 519 — — 6,784 Total vehicle loans 449,089 354,619 220,459 71,332 31,864 25,310 — — 1,152,673 Consumer loans Pass 128,809 83,419 35,183 17,439 7,848 11,757 66,965 1,695 353,115 Substandard 133 399 139 192 36 619 686 1 2,205 Total consumer loans 128,942 83,818 35,322 17,631 7,884 12,376 67,651 1,696 355,320 Total Personal Banking 1,493,070 1,050,211 581,626 426,061 338,820 1,573,084 536,613 44,365 6,043,850 Business Banking: Commercial real estate loans Pass 417,390 473,115 316,045 264,702 195,168 709,459 36,980 29,755 2,442,614 Special Mention 584 3,381 20,180 24,675 15,424 15,817 597 3,048 83,706 Substandard 7,426 4,007 57,694 56,991 24,056 140,147 2,240 29,100 321,661 Total commercial real estate loans 425,400 480,503 393,919 346,368 234,648 865,423 39,817 61,903 2,847,981 Commercial real estate loans - owner occupied Pass 24,895 67,162 87,497 71,626 46,760 100,081 4,422 7,648 410,091 Special Mention — 4,371 4,514 3,643 4,276 3,689 3,822 — 24,315 Substandard — 21,627 1,903 12,898 4,013 21,777 874 410 63,502 Total commercial real estate loans - owner occupied 24,895 93,160 93,914 88,167 55,049 125,547 9,118 8,058 497,908 Commercial loans Pass 479,436 99,877 50,915 51,858 58,597 49,178 286,467 16,170 1,092,498 Special Mention 5,828 2,751 5,579 4,588 162 190 16,512 5,668 41,278 Substandard 1,660 3,343 2,932 2,016 2,266 3,003 27,988 14,126 57,334 Total commercial loans 486,924 105,971 59,426 58,462 61,025 52,371 330,967 35,964 1,191,110 Total Business Banking 937,219 679,634 547,259 492,997 350,722 1,043,341 379,902 105,925 4,536,999 Total loans $ 2,430,289 1,729,845 1,128,885 919,058 689,542 2,616,425 916,515 150,290 10,580,849 The following table sets forth information about credit quality indicators as of December 31, 2019, prior to the adoption of ASU 2016-13 (in thousands): Pass Special Substandard Doubtful Loss Total loans Originated loans Personal Banking: Residential mortgage loans $ 2,776,971 — 8,218 — — 2,785,189 Home equity loans 1,093,874 — 5,640 — — 1,099,514 Consumer loans 1,084,986 — 4,161 — — 1,089,147 Total Personal Banking 4,955,831 — 18,019 — — 4,973,850 Commercial Banking: Commercial real estate loans 2,188,823 70,327 89,898 — — 2,349,048 Commercial loans 571,011 42,352 50,796 — — 664,159 Total Commercial Banking 2,759,834 112,679 140,694 — — 3,013,207 Total originated loans 7,715,665 112,679 158,713 — — 7,987,057 Acquired loans Personal Banking: Residential mortgage loans 81,611 — 1,327 — — 82,938 Home equity loans 242,237 — 1,167 — — 243,404 Consumer loans 35,746 — 239 — — 35,985 Total Personal Banking 359,594 — 2,733 — — 362,327 Commercial Banking: Commercial real estate loans 349,993 10,243 45,106 — — 405,342 Commercial loans 45,972 28 7,948 — — 53,948 Total Commercial Banking 395,965 10,271 53,054 — — 459,290 Total acquired loans 755,559 10,271 55,787 — — 821,617 Total loans $ 8,471,224 122,950 214,500 — — 8,808,674
Schedule of financial instruments with off-balance-sheet risk	Financial instruments with off-balance-sheet risk as of December 31, 2020 and 2019 are presented in the following table: Years ended December 31, 2020 2019 Loans commitments $ 251,145 234,137 Undisbursed lines of credit 1,044,824 917,161 Standby letters of credit 45,137 40,303 Total $ 1,341,106 1,191,601
Schedule of changes in mortgage servicing rights	The following table shows changes in MSRs as of and for the years ended December 31, 2020 and 2019: Servicing rights Valuation allowance Net carrying Balance at December 31, 2018 $ 2,103 — 2,103 Additions 862 (1) 861 Amortization (1,117) — (1,117) Balance at December 31, 2019 1,848 (1) 1,847 Additions 9,549 (491) 9,058 Amortization (2,740) — (2,740) Balance at December 31, 2020 $ 8,657 (492) 8,165
Schedule of loan	The carrying amount of these loans is as follows (in thousands): Total Purchase price of loans at acquisition $ 244,546 Allowance for credit losses at acquisition (8,845) Non-credit premium at acquisition 4,154 Par value of acquired loans at acquisition $ 239,855
Schedule of information related to the outstanding principal balance and related carrying value of acquired loans	The following table provides information related to the outstanding principal balance and related carrying value of acquired loans for the dates indicated (in thousands): December 31, 2019 Acquired loans evaluated individually for future credit losses: Outstanding principal balance $ 7,187 Carrying value 4,975 Acquired loans evaluated collectively for future credit losses: Outstanding principal balance 826,412 Carrying value 816,642 Total acquired loans: Outstanding principal balance 833,599 Carrying value 821,617
Schedule of the changes in the accretable discount	The following table provides information related to the changes in the accretable discount, which includes income recognized from contractual cash flows for the dates indicated prior to the adoption of ASU 2016-13 (in thousands): Total Balance at December 31, 2018 $ 755 Accretion (551) Net reclassification from nonaccretable yield 966 Balance at December 31, 2019 1,170 The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2019 prior to the adoption of ASU 2016-13 (in thousands): Carrying Outstanding Related Average Interest Personal Banking: Residential mortgage loans $ 742 1,232 7 866 147 Home equity loans 715 1,569 25 861 114 Consumer loans 7 34 1 18 12 Total Personal Banking 1,464 2,835 33 1,745 273 Commercial Banking: Commercial real estate loans 3,433 4,268 6 3,509 273 Commercial loans 78 84 1 78 5 Total Commercial Banking 3,511 4,352 7 3,587 278 Total loans $ 4,975 7,187 40 5,332 551

Accrued Interest Receivable (Ta

Accrued Interest Receivable (Tables)	12 Months Ended
	Dec. 31, 2020
Interest Receivable and Other Assets [Abstract]
Schedule of accrued interest receivable	Accrued interest receivable as of December 31, 2020 and 2019 is presented in the following table: December 31, 2020 2019 Investment securities $ 1,660 730 FHLB dividends 197 211 Mortgage-backed securities 2,031 1,508 Loans receivable 31,666 23,306 $ 35,554 25,755

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	Premises and equipment at December 31, 2020 and 2019 are summarized by major classification in the following table: December 31, 2020 2019 Land and land improvements $ 26,878 22,194 Office buildings and improvements 154,439 154,535 Furniture, fixtures and equipment 134,821 124,216 Leasehold improvements 18,845 20,770 Total, at cost 334,983 321,715 Less accumulated depreciation and amortization (173,445) (174,306) Premises and equipment, net $ 161,538 147,409

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of intangible assets subject to amortization	The following table provides information for intangible assets subject to amortization for the years ended December 31, 2020 and 2019: December 31, 2020 2019 Amortizable intangible assets: Core deposit intangibles - gross $ 71,182 71,183 Acquisitions 3,717 — Less: accumulated amortization (56,896) (50,934) Core deposit intangibles - net $ 18,003 20,249 Customer and Contract intangible assets - gross $ 12,775 12,775 Less: accumulated amortization (10,842) (9,948) Customer and Contract intangible assets - net 1,933 2,827 Total intangible assets - net $ 19,936 23,076
Schedule of the actual aggregate amortization expense as well as estimated aggregate amortization expense, based upon current levels of intangible assets	The following information shows the actual aggregate amortization expense for the years ended December 31, 2020, 2019 and 2018 as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for each of the five succeeding fiscal years: For the year ended December 31, 2018 $ 5,848 For the year ended December 31, 2019 6,543 For the year ended December 31, 2020 6,856 For the year ending December 31, 2021 5,902 For the year ending December 31, 2022 4,680 For the year ending December 31, 2023 3,592 For the year ending December 31, 2024 2,692 For the year ending December 31, 2025 1,819
Schedule of the changes in carrying amount of goodwill	The following table provides information for the changes in the carrying amount of goodwill: Total Balance at December 31, 2018 $ 307,420 Goodwill acquired 38,683 Balance at December 31, 2019 346,103 Goodwill acquired 36,176 Balance at December 31, 2020 $ 382,279

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Schedule of deposit balances	Deposit balances at December 31, 2020 and 2019 are shown in the table below: December 31, 2020 2019 Noninterest-bearing demand deposits $ 2,716,224 1,609,653 Interest-bearing demand deposits 2,755,950 1,944,108 Money market deposit accounts 2,437,539 1,863,998 Savings deposits 2,047,424 1,604,838 Time deposits 1,642,096 1,569,410 Total deposits $ 11,599,233 8,592,007
Summarizes the contractual maturity of the certificate accounts	The following table summarizes the contractual maturity of time deposits at December 31, 2020 and 2019: December 31, 2020 2019 Due within 12 months $ 990,769 909,509 Due between 12 and 24 months 380,466 300,656 Due between 24 and 36 months 164,583 214,301 Due between 36 and 48 months 64,700 106,065 Due between 48 and 60 months 36,098 35,358 After 60 months 5,480 3,521 Total time deposits $ 1,642,096 1,569,410
Summarizes the interest expense incurred on the deposits	The following table summarizes the interest expense incurred on the respective deposits for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Interest-bearing demand deposits $ 3,358 6,012 3,607 Money market deposit accounts 7,021 13,010 5,740 Savings deposits 2,614 3,115 3,064 Time deposits 22,903 27,079 18,574 Total interest expense on deposits $ 35,896 49,216 30,985

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of borrowed funds	Borrowed funds at December 31, 2020 and 2019 are presented in the following table: December 31, 2020 2019 Amount Average rate Amount Average rate Term notes payable to the FHLB: Payable to the FHLB of Indianapolis acquired from MutualBank $ 22,054 1.92 % $ — — % Payable to the FHLB of Pittsburgh — — % 153,600 2.38 % Total term notes payable to the FHLB 22,054 153,600 Collateralized borrowings, due within one year 137,661 0.19 % 92,736 0.25 % Subordinated debentures, net of issuance costs 123,329 4.00 % — — % Total borrowed funds $ 283,044 246,336
Schedule of capital debt securities and junior subordinated deferrable interest debentures	The following table sets forth a summary of the cumulative trust preferred securities and the junior subordinated debt held by the Trust as of December 31, 2020 and 2019. Maturity date Interest rate Capital debt December 31, 2020 2019 Northwest Bancorp Capital Trust III December 30, 2035 3-month LIBOR plus 1.38% $ 50,000 51,547 51,547 Northwest Bancorp Statutory Trust IV December 15, 2035 3-month LIBOR plus 1.38% 50,000 51,547 51,547 LNB Trust II June 15, 2037 3-month LIBOR plus 1.48% 7,875 8,119 8,119 Union National Capital Trust I (1) January 23, 2034 3-month LIBOR plus 2.85% 8,000 7,925 7,900 Union National Capital Trust II (1) November 23, 2034 3-month LIBOR plus 2.00% 3,000 2,714 2,687 MFBC Statutory Trust I (1) September 15, 2035 3-month LIBOR plus 1.70% 5,000 3,476 — Universal Preferred Trust (1) October 7, 2035 3-month LIBOR plus 1.69% 5,000 3,466 — Total $ 128,875 128,794 121,800

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of allocation of income tax	Total income tax was allocated for the years ended December 31, 2020, 2019 and 2018 as follows: Years ended December 31, 2020 2019 2018 Income tax expense $ 17,672 30,679 28,422 Shareholders’ equity for unrealized gain/(loss) on securities available-for-sale 5,061 3,992 (573) Shareholders’ equity for pension adjustment (3,774) (2,859) (24) Shareholders’ equity for swap fair value adjustment — — 223 Unallocated income tax $ 18,959 31,812 28,048
Schedule of income tax expense (benefit) applicable to income before taxes	Income tax expense applicable to income before taxes consists of: Years ended December 31, 2020 2019 2018 Current $ 25,756 27,903 31,192 Deferred (8,084) 2,776 (2,770) Total income tax expense $ 17,672 30,679 28,422
Schedule of reconciliation of the expected federal statutory rate to the effective rate	A reconciliation of the expected federal statutory income tax rate to the effective rate, expressed as a percentage of pretax income for the years ended December 31, 2020, 2019 and 2018, is as follows: Years ended December 31, 2020 2019 2018 Expected tax rate 21.0 % 21.0 % 21.0 % Tax-exempt interest income (1.7) % (0.8) % (0.9) % State income tax, net of federal benefit 2.2 % 3.7 % 3.8 % Bank-owned life insurance (1.1) % (0.6) % (0.9) % Stock-based compensation 0.2 % (0.6) % (0.8) % Dividends on stock plans (0.9) % (0.6) % (0.6) % Low income housing and historic tax credits (0.9) % (0.5) % (0.6) % Other 0.3 % 0.1 % 0.2 % Effective tax rate 19.1 % 21.7 % 21.2 %
Tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are presented below: December 31, 2020 2019 Deferred tax assets: Deferred compensation expense $ 4,272 1,974 Bad debts 30,418 12,609 Other reserves 2,358 961 Accrued post-retirement benefit cost 778 436 Stock benefit plans 820 994 Pension and post-retirement benefits 19,405 15,916 Deferred income 540 728 Lease liability 11,713 11,493 Purchase accounting 412 — Net operating loss 2,800 504 Other 1,338 626 Total deferred tax assets 74,854 46,241 Deferred tax liabilities: Pension expense 6,198 5,864 Purchase accounting — 291 Intangible assets 15,419 14,464 Mortgage servicing rights 1,831 407 Fixed assets 4,740 5,755 Net deferred loan costs 1,548 5,042 Right of use asset 10,844 10,895 Unrealized gain on fair value of securities available-for-sale 6,332 1,259 Interest rate derivatives 1,268 — Other 2,670 314 Total deferred tax liabilities 50,850 44,291 Net deferred tax asset $ 24,004 1,950
Summary of unrecognized tax benefits	The following table presents changes in unrecognized tax benefits for the year ended December 31, 2020: Year ended December 31, 2020 Unrecognized tax benefits: Balance, beginning of year $ — Increases related to prior year tax positions 336 Decreases related to prior year tax positions (5) Increases related to current year tax positions — Settlements — Lapse of statute — Balance, end of year $ 331

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	The computation of basic and diluted earnings per share for the years ended December 31, 2020, 2019 and 2018 follows: Years ended December 31, 2020 2019 2018 Net income available to common shareholders $ 74,854 110,432 105,491 Weighted average common shares outstanding (1) 120,244,474 104,878,774 102,073,888 Dilutive potential shares due to effect of stock options (1) — 960,375 1,492,013 Total weighted average common shares and dilutive potential shares (1) $ 120,244,474 105,839,149 103,565,901 Basic earnings per share (1) $ 0.62 1.05 1.03 Diluted earnings per share (1) $ 0.62 1.04 1.02 (1) Not in thousands.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of net periodic costs for the defined benefit pension plans and the post retirement healthcare plans	The following table sets forth the net periodic pension cost for the defined benefit pension plans for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Service cost $ 8,391 5,949 6,864 Interest cost 6,855 7,353 6,712 Expected return on plan assets (12,362) (11,037) (11,968) Amortization of prior service cost (2,322) (2,322) (2,322) Amortization of the net loss 3,695 3,423 3,489 Net periodic pension cost $ 4,257 3,366 2,775 The following table sets forth the net periodic benefit cost for the post-retirement healthcare benefits plan for the years ended December 31, 2020, 2019 and 2018: Years ended December 31, 2020 2019 2018 Interest cost $ 26 52 54 Amortization of net loss 18 68 98 Net period benefit cost $ 44 120 152
Schedule of other changes in the defined benefit pension plans' plan assets and benefit obligations recognized in other comprehensive income	The following table sets forth other changes in the defined benefit pension plans’ plan assets and benefit obligations recognized in other comprehensive income: Years ended December 31, 2020 2019 2018 Net (gain)/loss $ 11,521 8,235 (1,716) Amortization of prior service cost 2,323 2,323 2,323 Total recognized in other comprehensive income $ 13,844 10,558 607 Total recognized in net periodic pension cost and other comprehensive income $ 18,101 13,924 3,382 The following table sets forth other changes in the post-retirement healthcare plan’s plan assets and benefit obligations recognized in other comprehensive income: Years ended December 31, 2020 2019 2018 Net gain $ (51) (475) (305) Total recognized in other comprehensive income $ (51) (475) (305) Total recognized in net periodic benefit cost and other comprehensive loss $ (7) (355) (153)
Schedule of defined benefit pension plans' funded status	The following table sets forth information for the defined benefit pension plans’ funded status at December 31, 2020 and 2019: December 31, 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 222,497 181,121 Service cost 8,391 5,949 Interest cost 6,855 7,353 Actuarial loss 29,084 35,203 Benefits paid (8,238) (7,129) Benefit obligation at end of year $ 258,589 222,497 Change in plan assets: Fair value of plan assets at beginning of year $ 193,541 160,766 Actual return on plan assets 26,228 34,582 Employer contributions 5,341 5,322 Benefits paid (8,238) (7,129) Fair value of plan assets at end of period $ 216,872 193,541 Funded status at end of year $ (41,717) (28,956) The following table sets forth the funded status of the post-retirement healthcare benefit plan at December 31, 2020 and 2019: December 31, 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 889 1,332 Interest cost 26 52 Actuarial gain (34) (405) Benefits paid (111) (90) Benefit obligation at end of year $ 770 889 Change in plan assets: Employer contributions 111 90 Benefits paid (111) (90) Funded status at year end $ (770) (889)
Schedule of assumptions used to develop the net periodic pension cost	The following table sets forth the assumptions used to develop the net periodic pension cost: Years ended December 31, 2020 2019 2018 Discount rate 3.14 % 4.15 % 3.53 % Expected long-term rate of return on assets 6.50 % 7.00 % 7.00 % Rate of increase in compensation levels 3.00 % 3.00 % 3.00 % The assumptions used to develop the preceding information for post-retirement healthcare benefits are as follows: Years ended December 31, 2020 2019 2018 Discount rate 3.14 % 4.15 % 3.53 % Monthly cost of healthcare insurance per beneficiary (1) $ 370 391 507 Annual rate of increase in healthcare costs 4.00 % 4.00 % 4.00 % (1) Not in thousands.
Schedule of assumptions used to determine benefit obligations	The following table sets forth the assumptions used to determine benefit obligations at the end of each period: Years ended December 31, 2020 2019 2018 Discount rate 2.39 % 3.14 % 4.15 % Expected long-term rate of return on assets 6.50 % 6.50 % 7.00 % Rate of increase in compensation levels 3.00 % 3.00 % 3.00 %
Schedule of certain information related to pension plans	The following table sets forth certain information related to our pension plans: December 31, 2020 2019 Projected benefit obligation $ 258,589 222,497 Accumulated benefit obligation 258,589 222,497 Fair value of plan assets 216,872 193,541
Schedule of weighted average asset allocation of defined benefit plans	The following table sets forth the weighted average asset allocation of defined benefit plans: Target December 31, allocation 2020 2019 Debt securities 20 – 50% 22 % 24 % Equity securities 30 – 60% 67 % 70 % Other 5 – 50% 11 % 6 % Total 100 % 100 %
Schedule of allocation of plan assets	The following tables sets forth the pension plan assets as of December 31, 2020 and 2019: December 31, 2020 Assets at Fair Value Defined benefit pension assets: Common stock $ 52,019 52,019 Mutual funds 140,746 140,746 Money market funds 15,068 15,068 Other 8,879 8,879 Total defined benefit pension plan assets (1) $ 216,712 216,712 (1) The defined benefit pension plan statement of net assets also includes accrued interest and dividends resulting in net assets available for benefits of $216.9 million. December 31, 2019 Assets at Fair Value Defined benefit pension assets: Common stock $ 45,198 45,198 Mutual funds 127,186 127,186 Money market funds 12,024 12,024 Other 8,953 8,953 Total defined benefit pension plan assets (1) $ 193,361 193,361 (1) The defined benefit pension plan statement of net assets also includes accrued interest and dividends resulting in net assets available for benefits of $193.5 million.
Schedule of accumulated benefit obligation in excess of plan assets	The following table sets forth information for plans with an accumulated benefit obligation in excess of plan assets: December 31, 2020 2019 Projected benefit obligation $ 770 889 Accumulated benefit obligation 770 889
Schedule of activity under option plans	The following table summarizes the activity in our option plans during the years ended December 31, 2020, 2019 and 2018 (amounts in this table are not in thousands): Years ended December 31, 2020 2019 2018 Number Weighted average Number Weighted average Number Weighted average Balance at beginning of year 5,101,351 $ 14.28 5,612,812 $ 13.49 5,695,570 $ 12.75 Granted (1) 614,076 9.71 612,210 17.27 895,960 16.59 Exercised (2) (131,309) 11.81 (917,845) 11.77 (830,712) 10.38 Forfeited/expired (340,946) 14.39 (205,826) 14.28 (148,006) 12.52 Balance at end of year 5,243,172 13.72 5,101,351 14.28 5,612,812 13.49 Exercisable at end of year 3,350,356 13.53 2,803,918 13.36 3,016,175 12.61 (1) Weighted average fair value of options at grant date: $0.13, $1.14 and $1.49, respectively. (2) The total intrinsic value of options exercised was $444,000, $5.2 million and $4.8 million, respectively.
Schedule of number of options outstanding, number of options exercisable, and weighted average remaining life of all option grants	The following table summarizes the number of options outstanding, number of options exercisable, and weighted average remaining life of all option grants as of December 31, 2020 (amounts in this table are not in thousands): Exercise price $9.71 Exercise price $11.70 Exercise price $12.12 Exercise price $12.17 Exercise price $12.32 Exercise price $12.37 Options outstanding: Number of options 565,331 270,966 90,248 2,700 902,228 389,528 Weighted average remaining contract life (years) 6.50 1.50 0.10 0.25 0.50 4.50 Options exercisable: Number of options 96,865 252,096 90 2,700 902,228 269,944 Weighted average remaining term - vested (years) 6.50 1.50 0.10 0.25 0.50 4.50 Exercise price $12.44 Exercise price $13.15 Exercise price $14.15 Exercise price $15.57 Exercise price $16.59 Exercise price $17.27 Total $14.28 Options outstanding: Number of options 311,934 331,724 497,188 603,792 749,320 528,213 5,243,172 Weighted average remaining contract life (years) 2.50 3.50 5.50 6.50 4.50 5.50 3.92 Options exercisable: Number of options 267,230 256,922 304,568 317,526 398,156 191,873 3,350,356 Weighted average remaining term - vested (years) 2.50 3.50 5.50 6.50 4.50 5.50 3.12

Disclosures About Fair Value _2

Disclosures About Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of the carrying amount and estimated fair value of the entity's financial instruments included in the consolidated statement of financial condition	The following table sets forth the carrying amount and estimated fair value of our financial instruments included in the Consolidated Statement of Financial Condition at December 31, 2020 and 2019: December 31, 2020 Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 736,277 736,277 736,277 — — Securities available-for-sale 1,398,941 1,398,941 — 1,398,941 — Securities held-to-maturity 178,887 179,666 — 179,666 — Loans receivable, net 10,387,636 10,334,521 — — 10,334,521 Residential mortgage loans held-for-sale 58,786 58,786 — — 58,786 Accrued interest receivable 35,554 35,554 35,554 — — Interest rate lock commitments 6,465 6,465 — — 6,465 Forward commitments 1,105 1,105 — 1,105 — Interest rate swaps not designated as hedging instruments 53,863 53,863 — 53,863 — FHLB stock 21,748 21,748 — — — Total financial assets $ 12,879,262 12,826,926 771,831 1,633,575 10,399,772 Financial liabilities: Savings and checking accounts $ 9,957,137 9,957,137 9,957,137 — — Time deposits 1,642,096 1,669,546 — — 1,669,546 Borrowed funds 283,044 283,074 159,745 123,329 — Junior subordinated debentures 128,794 121,106 — — 121,106 Interest rate swaps not designated as hedging instruments 54,579 54,579 — 54,579 — Risk participation agreements 86 86 — 86 — Accrued interest payable 2,054 2,054 2,054 — — Total financial liabilities $ 12,067,790 12,087,582 10,118,936 177,994 1,790,652 December 31, 2019 Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 60,846 60,846 60,846 — — Securities available-for-sale 819,901 819,901 — 819,901 — Securities held-to-maturity 18,036 18,223 — 18,223 — Loans receivable, net 8,743,024 8,666,149 — — 8,666,149 Residential mortgage loans held-for-sale 7,709 7,709 — — 7,709 Accrued interest receivable 25,755 25,755 25,755 — — Interest rate lock commitments 559 559 — — 559 Forward commitments 145 145 — 145 — Interest rate swaps 20,889 20,889 — 20,889 — FHLB stock 14,740 14,740 — — — Total financial assets $ 9,711,604 9,634,916 86,601 859,158 8,674,417 Financial liabilities: Savings and checking deposits $ 7,022,597 7,022,597 7,022,597 — — Time deposits 1,569,410 1,574,063 — — 1,574,063 Borrowed funds 246,336 246,341 246,341 — — Junior subordinated debentures 121,800 115,518 — — 115,518 Interest rate swaps 20,952 20,952 — 20,952 — Risk participation agreements 39 39 — 39 — Accrued interest payable 1,142 1,142 1,142 — — Total financial liabilities $ 8,982,276 8,980,652 7,270,080 20,991 1,689,581
Schedule of assets and liabilities measured at fair value on a recurring basis	The following table represents assets and liabilities measured at fair value on a recurring basis as of December 31, 2020: Level 1 Level 2 Level 3 Total at Debt securities: U.S. government and agencies $ — 40,917 — 40,917 Government sponsored enterprises — 94,507 — 94,507 States and political subdivisions — 116,813 — 116,813 Total debt securities — 252,237 — 252,237 Residential mortgage-backed securities: GNMA — 23,026 — 23,026 FNMA — 203,571 — 203,571 FHLMC — 134,572 — 134,572 Non-agency — 465 — 465 Collateralized mortgage obligations: GNMA — 343,409 — 343,409 FNMA — 262,109 — 262,109 FHLMC — 179,552 — 179,552 Total mortgage-backed securities — 1,146,704 — 1,146,704 Interest rate lock commitments — — 6,465 6,465 Forward commitments — 1,105 — 1,105 Interest rate swaps not designated as hedging instruments — 53,863 — 53,863 Total assets $ — 1,453,909 6,465 1,460,374 Interest rate swaps not designated as hedging instruments $ — 54,579 — 54,579 Risk participation agreements — 86 — 86 Total liabilities $ — 54,665 — 54,665 The following table represents assets and liabilities measured at fair value on a recurring basis as of December 31, 2019: Level 1 Level 2 Level 3 Total at Debt securities: U.S. government and agencies $ — 14,991 — 14,991 Government sponsored enterprises — 104,784 — 104,784 States and political subdivisions — 26,048 — 26,048 Corporate — 919 — 919 Total debt securities — 146,742 — 146,742 Residential mortgage-backed securities: GNMA — 23,264 — 23,264 FNMA — 89,259 — 89,259 FHLMC — 50,139 — 50,139 Non-agency — 497 — 497 Collateralized mortgage obligations: GNMA — 207,016 — 207,016 FNMA — 184,682 — 184,682 FHLMC — 118,302 — 118,302 Total mortgage-backed securities — 673,159 — 673,159 Interest rate lock commitments — — 559 559 Forward commitments — 145 — 145 Interest rate swaps — 20,889 — 20,889 Total assets $ — 840,935 559 841,494 Interest rate swaps — 20,952 — 20,952 Risk participation agreements — 39 — 39 Total liabilities $ — 20,991 — 20,991
Schedule of reconciliation of debt securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2020 and 2019: December 31, 2020 2019 Beginning balance January 1, $ 559 — Total gains or losses: Included in net income — — Net activity 5,906 559 Transfers from Level 3 — — Transfers into of Level 3 — — Ending balance December 31, $ 6,465 559
Schedule of fair value measurement for nonrecurring assets	The following table represents the fair market measurement for only those nonrecurring assets that had a fair market value below the carrying amount as of December 31, 2020: Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 95,303 95,303 Real estate owned, net — — 2,232 2,232 Total assets $ — — 97,535 97,535 The following table represents the fair market measurement for only those nonrecurring assets that had a fair market value below the carrying amount as of December 31, 2019: Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 46,238 46,238 Real estate owned, net — — 950 950 Total assets $ — — 47,188 47,188
Schedule of quantitative information about assets measured at fair value on a recurring and nonrecurring basis for Level 3 Fair Value Measurements	The following table presents additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at December 31, 2020: Fair value Valuation Significant Range Loans individually assessed $ 95,303 Appraisal value (1) Estimated cost to sell 10% Discounted cash flow Discount rate 2.00% to 16.60% (8.26%) Real estate owned, net $ 2,232 Appraisal value (1) Estimated cost to sell 10% (1) Fair value is generally determined through independent appraisals of the underlying collateral, which may include Level 3 inputs that are not identifiable, or by using the discounted cash flow method if the loan is not collateral dependent.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Schedule of actual, required, and well capitalized levels	The actual, required, and well capitalized levels as of December 31, 2020 and 2019 were as follows: At December 31, 2020 Actual Minimum capital Well capitalized Amount Ratio Amount Ratio Amount Ratio Total capital (to risk weighted assets) Northwest Bancshares, Inc. $ 1,654,198 16.642 % $ 1,043,693 10.500 % $ 993,993 10.000 % Northwest Bank 1,478,310 14.887 % 1,042,655 10.500 % 993,004 10.000 % Tier 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,406,321 14.148 % 844,894 8.500 % 795,195 8.000 % Northwest Bank 1,354,028 13.636 % 844,054 8.500 % 794,403 8.000 % CET 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,281,516 12.893 % 695,795 7.000 % 646,096 6.500 % Northwest Bank 1,354,028 13.636 % 695,103 7.000 % 645,453 6.500 % Tier 1 capital (leverage) Northwest Bancshares, Inc. 1,406,321 10.145 % 554,501 4.000 % 693,126 5.000 % Northwest Bank 1,354,028 9.903 % 546,905 4.000 % 683,631 5.000 % (1) Amounts and ratios include the 2020 capital conservation buffer of 2.5% with the exception of Tier 1 capital to average assets. For further information related to the capital conservation buffer, see "Item 1. Business - Supervision and Regulation". At December 31, 2019 Actual Minimum capital Well capitalized Amount Ratio Amount Ratio Amount Ratio Total capital (to risk weighted assets) Northwest Bancshares, Inc. $ 1,300,321 15.701 % $ 869,585 10.500 % $ 828,176 10.000 % Northwest Bank 1,146,641 13.858 % 868,768 10.500 % 827,398 10.000 % Tier 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,242,380 15.001 % 703,950 8.500 % 662,541 8.000 % Northwest Bank 1,087,727 13.146 % 703,288 8.500 % 661,918 8.000 % CET 1 capital (to risk weighted assets) Northwest Bancshares, Inc. 1,124,259 13.575 % 579,723 7.000 % 538,314 6.500 % Northwest Bank 1,087,727 13.146 % 579,178 7.000 % 537,809 6.500 % Tier 1 capital (leverage) Northwest Bancshares, Inc. 1,242,380 11.913 % 417,143 4.000 % 521,428 5.000 % Northwest Bank 1,087,727 10.515 % 413,772 4.000 % 517,216 5.000 % (1) Amounts and ratios include the 2019 capital conservation buffer of 2.5% with the exception of Tier 1 capital to average assets. For further information related to the capital conservation buffer, see Item 1. Business - "Supervision and Regulation".

Components of Accumulated Oth_2

Components of Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of the components of accumulated other comprehensive income	The following table sets forth the components of accumulated other comprehensive loss as of December 31, 2020 and 2019: December 31, 2020 2019 Unrealized gain on marketable securities available-for-sale $ 16,843 3,147 Defined benefit pension plans (50,392) (40,088) Accumulated other comprehensive loss $ (33,549) (36,941)
Schedule of the changes in accumulated other comprehensive income by component	The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2020: Unrealized gains and losses on securities Change in Change in defined Total Balance as of January 1, $ 3,147 — (40,088) (36,941) Other comprehensive income/(loss) before reclassification adjustments (1), (2), (3) 13,711 (946) (11,301) 1,464 Amounts reclassified from accumulated other comprehensive income (4), (5), (6) (15) 946 997 1,928 Net other comprehensive income/(loss) 13,696 — (10,304) 3,392 Balance as of December 31, $ 16,843 — (50,392) (33,549) (1) Consists of unrealized holding gains, net of tax of $5,607. (2) Consists of unrealized holdings losses, net of tax $(209). (3) Consists of unrealized holding losses, net of tax of $(4,169). (4) Consists of realized gains, net of tax of $(6). (5) Consists of realized losses interest rate swaps , net of tax of $209. (6) Consists of realized gains, net of tax of $395. The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2019: Unrealized gains and losses on securities available-for-sale Change in defined Total Balance as of January 1, $ (6,832) (32,864) (39,696) Other comprehensive income/(loss) before reclassification adjustments (1), (2) 9,984 (8,059) 1,925 Amounts reclassified from accumulated other comprehensive income (3), (4) (5) 835 830 Net other comprehensive income/(loss) 9,979 (7,224) 2,755 Balance as of December 31, $ 3,147 (40,088) (36,941) (1) Consists of unrealized holding gains, net of tax of $3,990. (2) Consists of unrealized holding losses, net of tax of $(3,193). (3) Consists of realized gains, net of tax of $(2). (4) Consists of realized gains, net of tax of $334. The following table shows the changes in accumulated other comprehensive loss by component for the year ended December 31, 2018: Unrealized gains and losses on securities Change in Change in Total Balance as of January 1, $ (4,409) (691) (26,980) (32,080) Reclassification due to adoption of ASU No. 2018-02 (991) (149) (5,606) (6,746) Other comprehensive income/(loss) before reclassification adjustments (1), (2), (3) (1,277) 840 (1,181) (1,618) Amounts reclassified from accumulated other comprehensive income (4), (5) (155) — 903 748 Net other comprehensive income/(loss) (2,423) 691 (5,884) (7,616) Balance as of December 31, $ (6,832) — (32,864) (39,696) (1) Consists of unrealized holding losses, net of tax of $(513). (2) Consists of unrealized holding losses, net of tax of $223. (3) Consists of unrealized holding losses, net of tax of $(770). (4) Consists of realized gains, net of tax of $(60). (5) Consists of realized gains, net of tax of $746.

Parent Company Only Financial_2

Parent Company Only Financial Statements - Condensed (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Schedule of statements of financial condition	Statements of Financial Condition December 31, 2020 2019 Assets Cash and cash equivalents $ 172,142 150,926 Investment in bank subsidiary 1,585,429 1,314,724 Other assets 9,352 9,817 Total assets $ 1,766,923 1,475,467 Liabilities and shareholders’ equity Liabilities: Debentures payable $ 252,123 121,801 Other liabilities 1,889 381 Total liabilities 254,012 122,182 Shareholders’ equity 1,512,911 1,353,285 Total liabilities and shareholders’ equity $ 1,766,923 1,475,467
Schedule of statements of income	Statements of Income Years ended December 31, 2020 2019 2018 Income: Interest income $ 196 209 198 Other income 553 628 752 Dividends from bank subsidiary* — 110,000 105,000 Undistributed earnings from equity investment in bank subsidiary 80,996 5,102 5,149 Total income 81,745 115,939 111,099 Expense: Compensation and employee benefits 1,234 1,124 1,225 Other expenses 2,241 791 660 Interest expense 4,933 4,833 4,961 Total expense 8,408 6,748 6,846 Income before income taxes 73,337 109,191 104,253 Income tax benefit (1,517) (1,241) (1,238) Net income $ 74,854 110,432 105,491 * The dividend paid by Northwest Bank to Northwest Bancshares, Inc. was subsequently paid in January 2021 in the amount of $73.0 million.
Schedule of statements of cash flows	Statements of Cash Flows Years ended December 31, 2020 2019 2018 Operating activities: Net income $ 74,854 110,432 105,491 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiary (80,996) (5,102) (5,149) Gain on sale of marketable securities — (29) (146) Net change in other assets and liabilities 128,287 (43,453) 91,520 Net cash provided by operating activities 122,145 61,848 191,716 Investing activities: Net purchase sale of marketable securities — — (550) Net cash used in investing activities — — (550) Financing activities: Cash dividends paid on common stock (93,132) (76,173) (69,921) Repurchase of Northwest stock (9,276) — — Proceeds from stock options exercised 1,479 9,727 8,191 Net cash used in financing activities (100,929) (66,446) (61,730) Net increase/(decrease) in cash and cash equivalents $ 21,216 (4,598) 129,436 Cash and cash equivalents at beginning of period $ 150,926 155,524 26,088 Net increase/(decrease) in cash and cash equivalents 21,216 (4,598) 129,436 Cash and cash equivalents at end of period $ 172,142 150,926 155,524

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table presents information regarding our derivative financial instruments for the periods indicated: Asset derivatives Liability derivatives Notional amount Fair value Notional amount Fair value At December 31, 2020 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 599,300 53,863 599,300 54,579 Interest rate lock commitments 171,357 6,465 — — Forward commitments 25,474 1,105 — — Risk participation agreements — — 77,532 86 Total derivatives $ 796,131 61,433 676,832 54,665 At December 31, 2019 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 391,502 20,889 391,502 20,952 Interest rate lock commitments 24,373 559 — — Forward commitments 5,151 145 — — Risk participation agreements — — 41,164 39 Total derivatives $ 421,026 21,593 432,666 20,991
Gain (Loss) on Derivative Instruments	The following table indicates the gain or loss recognized in income on derivatives for the periods indicated: For the years ended December 31, 2020 2019 2018 Non-hedging swap derivatives: Decrease in other income $ (700) (63) (288) Increase in mortgage banking income 6,867 — — Hedging interest rate derivatives: Increase/(decrease) in interest expense (35) — 949

Selected Quarterly Financial _2

Selected Quarterly Financial Data - Unaudited (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of selected quarterly financial data	Quarters ended March 31, 2020 June 30, 2020 September 30, 2020 December 31, 2020 (In thousands, except per share data) Interest income $ 100,378 108,547 113,414 111,729 Interest expense 13,150 10,469 9,880 8,841 Net interest income 87,228 98,078 103,534 102,888 Provision for credit losses 27,637 51,750 6,818 (2,230) Noninterest income 27,976 35,496 36,670 32,123 Noninterest expense 78,611 89,163 86,869 92,849 Income/(loss) before income taxes 8,956 (7,339) 46,517 44,392 Income tax expense/(benefit) 1,017 (1,139) 8,467 9,327 Net income/(loss) $ 7,939 (6,200) 38,050 35,065 Basic earnings/(loss) per share $ 0.08 (0.05) 0.30 0.28 Diluted earnings/(loss) per share $ 0.07 (0.05) 0.30 0.28 Quarters ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 (In thousands, except per share data) Interest income $ 100,289 106,807 106,866 103,418 Interest expense 12,307 14,204 15,930 14,473 Net interest income 87,982 92,603 90,936 88,945 Provision for credit losses 6,467 4,667 3,302 8,223 Noninterest income 21,662 23,363 26,169 28,213 Noninterest expense 71,424 77,512 70,596 76,571 Income before income taxes 31,753 33,787 43,207 32,364 Income tax expense 6,709 7,404 9,793 6,773 Net income $ 25,044 26,383 33,414 25,591 Basic earnings per share $ 0.24 0.25 0.32 0.24 Diluted earnings per share $ 0.24 0.25 0.31 0.24 Quarters ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 (In thousands, except per share data) Interest income $ 89,533 92,875 95,605 97,768 Interest expense 7,766 8,649 9,788 10,937 Net interest income 81,767 84,226 85,817 86,831 Provision for credit losses 4,209 5,349 6,982 3,792 Noninterest income 21,788 24,109 22,557 23,248 Noninterest expenses 67,421 69,787 66,617 72,273 Income before income taxes 31,925 33,199 34,775 34,014 Income tax expense 6,940 6,900 7,035 7,547 Net income $ 24,985 26,299 27,740 26,467 Basic earnings per share $ 0.25 0.26 0.27 0.26 Diluted earnings per share $ 0.24 0.25 0.27 0.26

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Loans Receivable and Allowance for Loan Losses and Other Narrative Information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)segmentbank_location	Dec. 31, 2019USD ($)
Nature of Operations
Number of banking locations | bank_location	170
Number of reportable business segments | segment	1
Marketable Securities
Securities classified as trading	$ 0	$ 0
Debt securities held to maturity accrued interest receivable	1,800,000	1,500,000
Available for sale accrued interest receivable	1,900,000	900,000
Loans Receivable
Accrued interest receivable	31,700,000	23,300,000
Financing Receivable Accrued Interest Received Current	$ 4,400,000
Number of days in delinquency for accrued interest on loans to be considered for reversal, minimum	90 days
Number of days delinquent for loans to be placed on non-accrual status, minimum	90 days
Period of time to return TDRs included in impaired loans to performing status through the fulfilling of contractual terms	180 days
Residential mortgage loans classified as held-for-sale	$ 58,800,000	$ 7,700,000
Number of loan segments | segment	7
C O V I D 19
Loans Receivable
Financing receivable allowance for credit Loss deferral period	6 months

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Premises and Equipment and Goodwill (Details)	12 Months Ended
	Dec. 31, 2020
Minimum
Premises and Equipment
Estimated lives	3 years
Core Deposit Intangibles
Useful life of core deposit intangibles	7 years
Maximum
Premises and Equipment
Estimated lives	39 years
Core Deposit Intangibles
Useful life of core deposit intangibles	11 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Stock Related Compensation and Segments (Details) - USD ($) $ in Millions	May 20, 2020	May 22, 2019	May 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Related Compensation
Risk-free interest rates, maximum				3.10%
Total $14.28
Stock-based aggregate disclosure
Weighted average remaining term - vested (years)				3 years 1 month 13 days
Minimum
Stock-based aggregate disclosure
Useful life of core deposit intangibles				7 years
Maximum
Stock-based aggregate disclosure
Useful life of core deposit intangibles				11 years
Employees
Stock Related Compensation
Number of shares awarded	261,091
Director
Stock Related Compensation
Number of shares awarded	21,600
Stock options
Stock Related Compensation
Expected volatility, minimum				13.00%
Expected volatility, maximum				22.00%
Risk-free interest rates, minimum				0.70%
Number of shares awarded				614,076	612,210	895,960
Vesting period				7 years	7 years
Stock-based aggregate disclosure
Compensation expense for unvested common share awards which is yet to be recognized				$ 2.4
Stock options | Minimum
Stock Related Compensation
Dividend yields				3.20%
Expected lives				7 years
Stock options | Maximum
Stock Related Compensation
Dividend yields				7.50%
Expected lives				10 years
Stock options | Employees
Stock Related Compensation
Number of shares awarded	556,476	547,410	831,160	556,476	547,410
Stock options | Director
Stock Related Compensation
Number of shares awarded	57,600	64,800	64,800	57,600	64,800
Restricted common shares
Stock Related Compensation
Vesting period				7 years	7 years
Stock-based aggregate disclosure
Stock-based employee compensation expense				$ 3.5	$ 5.7	$ 5.8
Effect of compensation expense on net income included in income before income taxes				$ 2.5	$ 4.1	$ 4.2
Restricted common shares | Employees
Stock Related Compensation
Number of shares awarded		256,800	390,030	261,091	256,800
Restricted common shares | Director
Stock Related Compensation
Number of shares awarded		24,300	24,300	21,600

Recently Adopted Accounting S_2

Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		$ 134,427	$ 57,941	$ 55,214	$ 56,795
Retained earnings		555,480	583,407
Acquired
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		$ 31,553	6,502	$ 3,463	$ 6,223
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 10,800		$ 10,792
Credit loss, liability	2,300
Deferred income tax assets	2,900
Retained earnings	$ 9,600
Financing receivable allowance for credit Loss deferral period	2 years
Credit loss phase in of impact of adoption percent	25.00%
Cumulative Effect, Period of Adoption, Adjustment | Phase In Period Period One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Credit loss phase in of impact of adoption percent	25.00%
Cumulative Effect, Period of Adoption, Adjustment | Phase In Period Period Two
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Credit loss phase in of impact of adoption percent	25.00%
Cumulative Effect, Period of Adoption, Adjustment | Acquired
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 517

Acquisition - Narrative (Detail

Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands	Apr. 24, 2020USD ($)office$ / sharesshares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Acquisition
Cash in lieu of fractional shares, share price (in dollars per share) | $ / shares	$ 10.71
Fair value of loans acquired, discount	$ 14,700
Acquisition/branch optimization expense		$ 20,789	$ 4,168	$ 1,014
Mutual First Financial Inc.
Acquisition
Total consideration	$ 213,406
Number of offices acquired | office	36
Number of shares from converting each share (in shares) | shares	2.4
Stock issued for acquisition (in shares) | shares	20,658,957
Value of stock issued for purchase	$ 213,406
Closing price of Company's stock issued for purchase (in dollars per share) | $ / shares	$ 10.33
Loans, net	$ 1,508,141
Acquisition/branch optimization expense		$ 12,100
Mutual First Financial Inc. | Core Deposits
Acquisition
Acquired finite-lived intangible assets weighted average useful life	7 years

Acquisition - Assets Acquired a

Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Apr. 24, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value
Goodwill		$ 382,279	$ 346,103	$ 307,420
Mutual First Financial Inc.
Consideration paid:
Northwest Bancshares, Inc. common stock issued	$ 213,406
Total consideration paid	213,406
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value
Cash and cash equivalents	261,712
Investment securities available-for-sale	126,854
Loans, net	1,508,141
FHLB stock	13,115
Premises and equipment	19,094
Core deposit intangible	3,717
Other assets	121,790
Deposits	(1,617,039)
Borrowings	(232,200)
Junior subordinated debentures	(6,804)
Other liabilities	(21,150)
Total identifiable net assets	177,230
Goodwill	$ 36,176

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Rental expense	$ 6,819	$ 6,199
Rental expense			$ 5,400
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term of contract (up to)	35 years
Lease renewal term	10 years

Leases - Schedule of Lease Cost

Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease costs (office operations)	$ 6,139	$ 5,603
Variable lease costs (office operations)	680	596
Total operating lease costs	$ 6,819	$ 6,199

Leases - Schedule of Lease Asse

Leases - Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease ROU assets (other assets)	$ 48,329	$ 49,380
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities
Operating lease liabilities (other liabilities)	$ 52,206	$ 52,092

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flow from operating leases	$ 6,204	$ 5,564
ROU assets obtained in exchange for lease obligations	$ 8,657	$ 13,268
Weighted average remaining lease term	15 years 1 month 6 days	15 years 8 months 12 days
Weighted average discount rate	3.40%	3.70%

Leases - Schedule of Lease Matu

Leases - Schedule of Lease Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Year one	$ 6,079	$ 5,692
Year two	5,681	5,362
Year three	5,403	5,042
Year four	4,731	4,734
Year five	4,521	4,408
Thereafter	41,882	44,758
Total lease payments	68,297	69,996
Less amount of lease payments representing interest	16,091	17,904
Total present value of lease payments	$ 52,206	$ 52,092

Marketable Securities - Availab

Marketable Securities - Available For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized cost
Residential mortgage-backed securities, amortized cost	$ 1,375,685	$ 815,495
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	24,702	7,351
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,446)	(2,945)
Fair value
Securities available-for-sale	1,398,941	819,901
U.S. government and agencies
Amortized cost
Due in less than one year	40,761	14,951
Gross unrealized holding gains
Due in less than one year	211	40
Gross unrealized holding losses
Due in less than one year	(55)	0
Fair value
Due in less than one year	40,917	14,991
Government sponsored enterprises
Amortized cost
Due in less than one year	24,976	50,777
Due in one year through five years	238	50,229
Due in five years through ten years	68,973
Due after ten years		3,716
Gross unrealized holding gains
Due in less than one year	159	345
Due in one year through five years	3	0
Due in five years through ten years	238
Due after ten years		53
Gross unrealized holding losses
Due in less than one year	0	0
Due in one year through five years	0	(227)
Due in five years through ten years	(80)
Due after ten years		(109)
Fair value
Due in less than one year	25,135	51,122
Due in one year through five years	241	50,002
Due in five years through ten years	69,131
Due after ten years		3,660
Municipal securities
Amortized cost
Due in less than one year	4,008	809
Due in one year through five years	2,803	2,891
Due in five years through ten years	16,045	10,155
Due after ten years	89,778	11,695
Gross unrealized holding gains
Due in less than one year	14	4
Due in one year through five years	63	79
Due in five years through ten years	429	148
Due after ten years	3,752	267
Gross unrealized holding losses
Due in less than one year	0	0
Due in one year through five years	(2)	0
Due in five years through ten years	(5)	0
Due after ten years	(72)	0
Fair value
Due in less than one year	4,022	813
Due in one year through five years	2,864	2,970
Due in five years through ten years	16,469	10,303
Due after ten years	93,458	11,962
Money market funds
Amortized cost
Due in five years through ten years		919
Gross unrealized holding gains
Due in five years through ten years		0
Gross unrealized holding losses
Due in five years through ten years		0
Fair value
Due in five years through ten years		919
Residential mortgage-backed securities
Amortized cost
Residential mortgage-backed securities, amortized cost	1,128,103	669,353
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	19,833	6,415
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,232)	(2,609)
Fair value
Securities available-for-sale	1,146,704	673,159
Fixed rate | Pass-through
Amortized cost
Residential mortgage-backed securities, amortized cost	339,406	142,421
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	7,125	1,941
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(86)	(881)
Fair value
Securities available-for-sale	346,445	143,481
Fixed rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities, amortized cost	723,586	452,256
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	11,758	3,518
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,093)	(1,606)
Fair value
Securities available-for-sale	734,251	454,168
Variable rate | Pass-through
Amortized cost
Residential mortgage-backed securities, amortized cost	14,778	18,933
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	431	749
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(20)	(4)
Fair value
Securities available-for-sale	15,189	19,678
Variable rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities, amortized cost	50,333	55,743
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	519	207
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(33)	(118)
Fair value
Securities available-for-sale	$ 50,819	$ 55,832

Marketable Securities - Held To

Marketable Securities - Held To Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized cost
Held-to-maturity securities, amortized cost	$ 178,887	$ 18,036
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	904	187
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	(125)	0
Fair value
Investment securities held-to-maturity, fair value	179,666	18,223
U.S. government sponsored enterprises | Pass-through
Amortized cost
Held-to-maturity securities, amortized cost	67,990
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	12
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	(123)
Fair value
Investment securities held-to-maturity, fair value	67,879
Residential mortgage-backed securities
Amortized cost
Held-to-maturity securities, amortized cost	110,897	18,036
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	892	187
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	(2)	0
Fair value
Investment securities held-to-maturity, fair value	111,787	18,223
Fixed rate | Pass-through
Amortized cost
Held-to-maturity securities, amortized cost	1,723	2,197
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	131	83
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	0	0
Fair value
Investment securities held-to-maturity, fair value	1,854	2,280
Fixed rate | Agency CMOs
Amortized cost
Held-to-maturity securities, amortized cost	107,651	14,016
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	716	68
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	(2)	0
Fair value
Investment securities held-to-maturity, fair value	108,365	14,084
Variable rate | Pass-through
Amortized cost
Held-to-maturity securities, amortized cost	919	1,210
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	30	28
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	0	0
Fair value
Investment securities held-to-maturity, fair value	949	1,238
Variable rate | Agency CMOs
Amortized cost
Held-to-maturity securities, amortized cost	604	613
Gross unrealized holding gains
Held-to-maturity securities, gross unrealized holding gains	15	8
Gross unrealized holding losses
Held-to-maturity securities, gross unrealized holding losses	0	0
Fair value
Investment securities held-to-maturity, fair value	$ 619	$ 621

Marketable Securities - Issuers

Marketable Securities - Issuers and the Carrying Values of Mortgage-Backed Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Marketable Securities
Total residential mortgage-backed securities		$ 837,900,000
Carrying value of marketable securities pledged	$ 160,300,000
Proceeds from sale of marketable securities available-for-sale	1,096,000	32,389,000	$ 5,206,000
Realized gains	64,000	29,000	189,000
Realized losses	0	0	37,000
Amounts recognized in allowance for credit losses for marketable securities	0
Other-than-temporary impairment loss		0	$ 0
Residential mortgage-backed securities
Marketable Securities
Total residential mortgage-backed securities	1,257,601,000	691,195,000
FNMA
Marketable Securities
Total residential mortgage-backed securities	532,532,000	280,832,000
GNMA
Marketable Securities
Total residential mortgage-backed securities	367,354,000	231,491,000
FHLMC
Marketable Securities
Total residential mortgage-backed securities	357,249,000	178,375,000
Other (including non-agency)
Marketable Securities
Total residential mortgage-backed securities	$ 466,000	$ 497,000

Marketable Securities - Fair Va

Marketable Securities - Fair Value and Gross Unrealized Losses on Marketable Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)position	Dec. 31, 2019USD ($)position
Marketable Securities
Less than 12 months - Fair value	$ 372,833	$ 173,112
Less than 12 months - Unrealized loss	(1,460)	(858)
12 months or more - Fair value	7,456	161,944
12 months or more - Unrealized loss	(111)	(2,087)
Total - Fair value	380,289	335,056
Total - Unrealized loss	$ (1,571)	$ (2,945)
Number of investments that are temporarily impaired | position	123	119
Total residential mortgage-backed securities		$ 837,900
Number of investment securities with other-than-temporary impairment | position		0
U.S. government sponsored enterprises
Marketable Securities
Less than 12 months - Fair value	$ 67,809	$ 0
Less than 12 months - Unrealized loss	(179)	0
12 months or more - Fair value	1,923	52,620
12 months or more - Unrealized loss	(80)	(336)
Total - Fair value	69,732	52,620
Total - Unrealized loss	(259)	(336)
Municipal securities
Marketable Securities
Less than 12 months - Fair value	4,257
Less than 12 months - Unrealized loss	(79)
12 months or more - Fair value	0
12 months or more - Unrealized loss	0
Total - Fair value	4,257
Total - Unrealized loss	(79)
Residential mortgage-backed securities | Agency CMOs
Marketable Securities
Less than 12 months - Fair value	300,767	173,112
Less than 12 months - Unrealized loss	(1,202)	(858)
12 months or more - Fair value	5,533	109,324
12 months or more - Unrealized loss	(31)	(1,751)
Total - Fair value	306,300	282,436
Total - Unrealized loss	$ (1,233)	$ (2,609)

Marketable Securities - Held-to

Marketable Securities - Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Marketable Securities, Available-for-sale [Line Items]
Held-to-maturity securities:	$ 178,887	$ 18,036
AA+
Marketable Securities, Available-for-sale [Line Items]
Held-to-maturity securities:	178,887
Residential mortgage-backed securities | AA+
Marketable Securities, Available-for-sale [Line Items]
Held-to-maturity securities:	110,897
U.S. government sponsored enterprises | AA+
Marketable Securities, Available-for-sale [Line Items]
Held-to-maturity securities:	$ 67,990

Loans Receivable - Summary of O

Loans Receivable - Summary of Originated and Acquired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses
Total loans receivable, gross	$ 10,580,849	$ 8,808,674
Allowance for credit losses	(134,427)	(57,941)	$ (55,214)	$ (56,795)
Total loans receivable, net	10,446,422	8,750,733
Loans held-for-sale	58,786	7,709
Unearned income, unamortized premiums and discounts and deferred fees and costs	40,900	40,200
Personal Banking
Allowance for loan losses
Total loans receivable, gross	6,043,850	5,336,177
Allowance for credit losses	(30,954)	(18,356)
Personal Banking | Residential mortgage loans
Allowance for loan losses
Total loans receivable, gross	3,068,121	2,868,127
Allowance for credit losses	(7,266)	(2,574)
Personal Banking | Home equity loans
Allowance for loan losses
Total loans receivable, gross	1,467,736	1,342,918
Allowance for credit losses	(5,992)	(3,189)
Personal Banking | Vehicle loans
Allowance for loan losses
Total loans receivable, gross	1,152,673	861,192
Allowance for credit losses	(14,825)	(7,292)
Personal Banking | Consumer loans
Allowance for loan losses
Total loans receivable, gross	355,320	263,940
Allowance for credit losses	(2,871)	(5,301)
Commercial Banking
Allowance for loan losses
Total loans receivable, gross	4,536,999	3,472,497
Allowance for credit losses	(103,473)	(39,585)
Commercial Banking | Commercial real estate loans
Allowance for loan losses
Total loans receivable, gross	2,847,981	2,228,109
Allowance for credit losses	(79,381)	(15,843)
Commercial Banking | Commercial real estate loans - owner occupied
Allowance for loan losses
Total loans receivable, gross	497,908	526,281
Allowance for credit losses	(10,518)	(5,745)
Commercial Banking | Commercial loans
Allowance for loan losses
Total loans receivable, gross	1,191,110	718,107
Allowance for credit losses	(13,574)	(17,997)
Originated
Allowance for loan losses
Total loans receivable, gross	8,799,008	7,987,057
Allowance for credit losses	(102,874)	(51,439)	(51,751)	(50,572)
Total loans receivable, net	8,696,134	7,935,618
Originated | Personal Banking
Allowance for loan losses
Total loans receivable, gross	5,212,402	4,973,850
Allowance for credit losses		(17,348)	(18,318)	(20,339)
Originated | Personal Banking | Residential mortgage loans
Allowance for loan losses
Total loans receivable, gross	2,753,593	2,785,189
Allowance for credit losses		(2,463)	(4,054)	(3,824)
Originated | Personal Banking | Home equity loans
Allowance for loan losses
Total loans receivable, gross	1,175,703	1,099,514
Allowance for credit losses		(2,830)	(3,184)	(4,072)
Originated | Personal Banking | Vehicle loans
Allowance for loan losses
Total loans receivable, gross	995,040	850,804
Originated | Personal Banking | Consumer loans
Allowance for loan losses
Total loans receivable, gross	288,066	238,343
Allowance for credit losses		(12,055)	(11,080)	(12,443)
Originated | Commercial Banking
Allowance for loan losses
Total loans receivable, gross	3,586,606	3,013,207
Allowance for credit losses		(34,091)	(33,433)	(30,233)
Originated | Commercial Banking | Commercial real estate loans
Allowance for loan losses
Total loans receivable, gross	2,223,108	1,915,949
Allowance for credit losses		(17,292)	(26,379)	(19,911)
Originated | Commercial Banking | Commercial real estate loans - owner occupied
Allowance for loan losses
Total loans receivable, gross	344,016	433,099
Originated | Commercial Banking | Commercial loans
Allowance for loan losses
Total loans receivable, gross	1,019,482	664,159
Allowance for credit losses		(16,799)	(7,054)	(10,322)
Acquired
Allowance for loan losses
Total loans receivable, gross	1,781,841	821,617
Allowance for credit losses	(31,553)	(6,502)	(3,463)	(6,223)
Total loans receivable, net	1,750,288	815,115
Acquired | Personal Banking
Allowance for loan losses
Total loans receivable, gross	831,448	362,327
Allowance for credit losses		(1,008)	(850)	(1,783)
Acquired | Personal Banking | Residential mortgage loans
Allowance for loan losses
Total loans receivable, gross	314,528	82,938
Allowance for credit losses		(111)	(83)	(131)
Acquired | Personal Banking | Home equity loans
Allowance for loan losses
Total loans receivable, gross	292,033	243,404
Allowance for credit losses		(359)	(348)	(762)
Acquired | Personal Banking | Vehicle loans
Allowance for loan losses
Total loans receivable, gross	157,633	10,388
Acquired | Personal Banking | Consumer loans
Allowance for loan losses
Total loans receivable, gross	67,254	25,597
Allowance for credit losses		(538)	(419)
Acquired | Personal Banking | Commercial loans
Allowance for loan losses
Allowance for credit losses			(419)	(890)
Acquired | Commercial Banking
Allowance for loan losses
Total loans receivable, gross	950,393	459,290
Allowance for credit losses		(5,494)	(2,613)	(4,440)
Acquired | Commercial Banking | Commercial real estate loans
Allowance for loan losses
Total loans receivable, gross	624,873	312,160
Allowance for credit losses		(4,296)	(1,996)	(3,549)
Acquired | Commercial Banking | Commercial real estate loans - owner occupied
Allowance for loan losses
Total loans receivable, gross	153,892	93,182
Acquired | Commercial Banking | Commercial loans
Allowance for loan losses
Total loans receivable, gross	$ 171,628	53,948
Allowance for credit losses		$ (1,198)	$ (617)	$ (891)

Loans Receivable - Narrative (D

Loans Receivable - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)
Credit quality indicators
Serviced loans for others	$ 1,516,000	$ 793,100	$ 794,200
Percentage of loan portfolio secured by properties located in Pennsylvania	42.00%	50.00%
Adjustable rate loans	$ 3,690,000	$ 3,090,000
Fixed rate loans	6,840,000	5,948,000
Allowance for loan and lease losses	50,000
Gain on sale of loans	1,302	1,734	0
Interest income recognized on impaired loans	$ 842	$ 3,070	$ 3,762
Number of contracts | contract	0	0
Total loans receivable, gross	$ 10,580,849	$ 8,808,674
Revolving loans converted to term loans during the period	23,100
Loans commitments
Credit quality indicators
Outstanding loan commitments for fixed rate loans	193,100
Outstanding loan commitments for adjustable rate loans	58,100
Standby letters of credit
Credit quality indicators
Maximum potential amount of future payments	45,100
Maximum potential amount of future payments fully collateralized	38,500
Liability recognized for the obligations	493,000	$ 444,000
Minimum | Special mention or substandard
Credit quality indicators
Total loans receivable, gross	$ 1,000

Loans Receivable - Changes in t

Loans Receivable - Changes in the Allowance for Losses on Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in allowance for losses on allocated loans receivable
Beginning balance	$ 57,941	$ 55,214	$ 56,795
Current period provision	83,975	22,659	20,332
Charge-offs	(34,718)	(26,212)	(29,641)
Recoveries	7,592	6,280	7,728
Initial ACL on loans purchased with credit deterioration	8,845
Ending balance	134,427	57,941	55,214
Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	10,792
Initial ACL on loans purchased with credit deterioration	517
Ending balance		10,792
Personal Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	18,356
Current period provision	8,896
Charge-offs	(14,183)
Recoveries	4,537
Initial ACL on loans purchased with credit deterioration	1,703
Ending balance	30,954	18,356
Personal Banking | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	11,645
Ending balance		11,645
Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,574
Current period provision	(3,289)
Charge-offs	(917)
Recoveries	362
Initial ACL on loans purchased with credit deterioration	1,095
Ending balance	7,266	2,574
Personal Banking | Residential mortgage loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	7,441
Ending balance		7,441
Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	3,189
Current period provision	(3,357)
Charge-offs	(608)
Recoveries	766
Initial ACL on loans purchased with credit deterioration	216
Ending balance	5,992	3,189
Personal Banking | Home equity loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,786
Ending balance		5,786
Personal Banking | Vehicle loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	7,292
Current period provision	11,416
Charge-offs	(6,827)
Recoveries	1,867
Initial ACL on loans purchased with credit deterioration	235
Ending balance	14,825	7,292
Personal Banking | Vehicle loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	842
Ending balance		842
Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,301
Current period provision	4,126
Charge-offs	(5,831)
Recoveries	1,542
Initial ACL on loans purchased with credit deterioration	157
Ending balance	2,871	5,301
Personal Banking | Consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(2,424)
Ending balance		(2,424)
Commercial Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	39,585
Current period provision	75,079
Charge-offs	(20,535)
Recoveries	3,055
Initial ACL on loans purchased with credit deterioration	7,142
Ending balance	103,473	39,585
Commercial Banking | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(853)
Ending balance		(853)
Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	15,843
Current period provision	58,483
Charge-offs	(4,240)
Recoveries	1,287
Initial ACL on loans purchased with credit deterioration	5,720
Ending balance	79,381	15,843
Commercial Banking | Commercial real estate loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,288
Ending balance		2,288
Commercial Banking | Commercial real estate loans - owner occupied
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,745
Current period provision	2,588
Charge-offs	(83)
Recoveries	27
Initial ACL on loans purchased with credit deterioration	963
Ending balance	10,518	5,745
Commercial Banking | Commercial real estate loans - owner occupied | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,278
Ending balance		1,278
Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	17,997
Current period provision	14,008
Charge-offs	(16,212)
Recoveries	1,741
Initial ACL on loans purchased with credit deterioration	459
Ending balance	13,574	17,997
Commercial Banking | Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(4,419)
Ending balance		(4,419)
Off-Balance Sheet Exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	974
Current period provision	3,139
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	6,363	974
Off-Balance Sheet Exposure | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,250
Ending balance		2,250
Off-Balance Sheet Exposure | Personal Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	725
Current period provision	7
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	37	725
Off-Balance Sheet Exposure | Personal Banking | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(695)
Ending balance		(695)
Off-Balance Sheet Exposure | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	0
Current period provision	2
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	2	0
Off-Balance Sheet Exposure | Personal Banking | Residential mortgage loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	0
Ending balance		0
Off-Balance Sheet Exposure | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	323
Current period provision	5
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	35	323
Off-Balance Sheet Exposure | Personal Banking | Home equity loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(293)
Ending balance		(293)
Off-Balance Sheet Exposure | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	402
Current period provision	0
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	0	402
Off-Balance Sheet Exposure | Personal Banking | Consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	(402)
Ending balance		(402)
Off-Balance Sheet Exposure | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	249
Current period provision	3,132
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	6,326	249
Off-Balance Sheet Exposure | Commercial Banking | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,945
Ending balance		2,945
Off-Balance Sheet Exposure | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	77
Current period provision	1,438
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	3,449	77
Off-Balance Sheet Exposure | Commercial Banking | Commercial real estate loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,934
Ending balance		1,934
Off-Balance Sheet Exposure | Commercial Banking | Commercial real estate loans - owner occupied
Changes in allowance for losses on allocated loans receivable
Beginning balance	3
Current period provision	235
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	326	3
Off-Balance Sheet Exposure | Commercial Banking | Commercial real estate loans - owner occupied | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	88
Ending balance		88
Off-Balance Sheet Exposure | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	169
Current period provision	1,459
Charge-offs	0
Recoveries	0
Initial ACL on loans purchased with credit deterioration	0
Ending balance	2,551	169
Off-Balance Sheet Exposure | Commercial Banking | Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance	923
Ending balance		923
Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance	51,439	51,751	50,572
Current period provision		16,190	20,939
Charge-offs		(21,406)	(26,695)
Recoveries		4,904	6,935
Ending balance	102,874	51,439	51,751
Originated | Personal Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	17,348	18,318	20,339
Current period provision		8,982	11,652
Charge-offs		(13,091)	(17,924)
Recoveries		3,139	4,251
Ending balance		17,348	18,318
Originated | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,463	4,054	3,824
Current period provision		(1,089)	808
Charge-offs		(935)	(1,067)
Recoveries		433	489
Ending balance		2,463	4,054
Originated | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,830	3,184	4,072
Current period provision		46	(25)
Charge-offs		(619)	(1,183)
Recoveries		219	320
Ending balance		2,830	3,184
Originated | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	12,055	11,080	12,443
Current period provision		10,025	10,869
Charge-offs		(11,537)	(15,674)
Recoveries		2,487	3,442
Ending balance		12,055	11,080
Originated | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	34,091	33,433	30,233
Current period provision		7,208	9,287
Charge-offs		(8,315)	(8,771)
Recoveries		1,765	2,684
Ending balance		34,091	33,433
Originated | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	17,292	26,379	19,911
Current period provision		(5,241)	11,349
Charge-offs		(5,078)	(6,096)
Recoveries		1,232	1,215
Ending balance		17,292	26,379
Originated | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	16,799	7,054	10,322
Current period provision		12,449	(2,062)
Charge-offs		(3,237)	(2,675)
Recoveries		533	1,469
Ending balance		16,799	7,054
Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance	6,502	3,463	6,223
Current period provision		6,469	(607)
Charge-offs		(4,806)	(2,946)
Recoveries		1,376	793
Ending balance	31,553	6,502	3,463
Acquired | Personal Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,008	850	1,783
Current period provision		662	(419)
Charge-offs		(1,003)	(1,005)
Recoveries		499	491
Ending balance		1,008	850
Acquired | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	111	83	131
Current period provision		184	(61)
Charge-offs		(231)	(112)
Recoveries		75	125
Ending balance		111	83
Acquired | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	359	348	762
Current period provision		322	(23)
Charge-offs		(502)	(602)
Recoveries		191	211
Ending balance		359	348
Acquired | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	538	419
Current period provision		156
Charge-offs		(270)
Recoveries		233
Ending balance		538	419
Acquired | Personal Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance		419	890
Current period provision			(335)
Charge-offs			(291)
Recoveries			155
Ending balance			419
Acquired | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,494	2,613	4,440
Current period provision		5,807	(188)
Charge-offs		(3,803)	(1,941)
Recoveries		877	302
Ending balance		5,494	2,613
Acquired | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	4,296	1,996	3,549
Current period provision		2,092	(467)
Charge-offs		(389)	(1,291)
Recoveries		597	205
Ending balance		4,296	1,996
Acquired | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	$ 1,198	617	891
Current period provision		3,715	279
Charge-offs		(3,414)	(650)
Recoveries		280	97
Ending balance		$ 1,198	$ 617

Loans Receivable - Loan Portfol

Loans Receivable - Loan Portfolio by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	$ 10,580,849		$ 8,808,674
Allowance for credit losses	134,427		57,941	$ 55,214	$ 56,795
Nonaccrual loans	102,832
Nonaccrual loans	79,992	$ 68,870	68,870
Loans 90 days past due and accruing	585		32
TDRs	32,135		31,999
Allowance related to TDRs	2,016		3,002
Additional commitments to customers with loans classified as TDRs	859		566
Nonaccrual TDRs	10,704		9,043
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	6,043,850		5,336,177
Allowance for credit losses	30,954		18,356
Nonaccrual loans	31,611
Nonaccrual loans	31,202	25,447	25,447
Loans 90 days past due and accruing	585		32
TDRs	10,490		9,523
Allowance related to TDRs	941		953
Additional commitments to customers with loans classified as TDRs	26		26
Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	3,068,121		2,868,127
Allowance for credit losses	7,266		2,574
Nonaccrual loans	15,924
Nonaccrual loans	15,923	14,476	14,476
Loans 90 days past due and accruing	0		0
TDRs	8,431		7,550
Allowance related to TDRs	560		560
Additional commitments to customers with loans classified as TDRs	0		0
Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	1,467,736		1,342,918
Allowance for credit losses	5,992		3,189
Nonaccrual loans	9,123
Nonaccrual loans	8,872	6,745	6,745
Loans 90 days past due and accruing	0		32
TDRs	2,058		1,973
Allowance related to TDRs	381		393
Additional commitments to customers with loans classified as TDRs	26		26
Personal Banking | Vehicle loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	1,152,673		861,192
Allowance for credit losses	14,825		7,292
Nonaccrual loans	5,533
Nonaccrual loans	5,377	3,147
Loans 90 days past due and accruing	1
TDRs	0
Allowance related to TDRs	0
Additional commitments to customers with loans classified as TDRs	0
Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	355,320		263,940
Allowance for credit losses	2,871		5,301
Nonaccrual loans	1,031
Nonaccrual loans	1,030	1,079
Loans 90 days past due and accruing	584
TDRs	1
Allowance related to TDRs	0
Additional commitments to customers with loans classified as TDRs	0
Personal Banking | Consumer Loan, Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross			1,125,132
Allowance for credit losses			12,593
Nonaccrual loans			4,226
Loans 90 days past due and accruing			0
TDRs			0
Allowance related to TDRs			0
Additional commitments to customers with loans classified as TDRs			0
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	4,536,999		3,472,497
Allowance for credit losses	103,473		39,585
Nonaccrual loans	71,221
Nonaccrual loans	48,790	43,423	43,423
Loans 90 days past due and accruing	0		0
TDRs	21,645		22,476
Allowance related to TDRs	1,075		2,049
Additional commitments to customers with loans classified as TDRs	833		540
Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	2,847,981		2,228,109
Allowance for credit losses	79,381		15,843
Nonaccrual loans	44,092
Nonaccrual loans	27,079	18,832
Loans 90 days past due and accruing	0
TDRs	18,430
Allowance related to TDRs	787
Additional commitments to customers with loans classified as TDRs	471
Commercial Banking | Commercial real estate loans - owner occupied
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	497,908		526,281
Allowance for credit losses	10,518		5,745
Nonaccrual loans	3,642
Nonaccrual loans	3,642	16,032
Loans 90 days past due and accruing	0
TDRs	761
Allowance related to TDRs	123
Additional commitments to customers with loans classified as TDRs	0
Commercial Banking | Commercial Real Estate, Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross			2,754,390
Allowance for credit losses			21,588
Nonaccrual loans			34,864
Loans 90 days past due and accruing			0
TDRs			19,358
Allowance related to TDRs			1,384
Additional commitments to customers with loans classified as TDRs			476
Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Total loans receivable, gross	1,191,110		718,107
Allowance for credit losses	13,574		17,997
Nonaccrual loans	23,487
Nonaccrual loans	18,069	$ 8,559	8,559
Loans 90 days past due and accruing	0		0
TDRs	2,454		3,118
Allowance related to TDRs	165		665
Additional commitments to customers with loans classified as TDRs	$ 362		$ 64

Loans Receivable - Composition

Loans Receivable - Composition of Impaired Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	$ 79,992	$ 68,870		$ 68,870
Nonaccrual loans with no allowance	22,840
Loans 90 days past due and accruing	585	147
Amortized cost basis of collateral-dependent loans	99,039
Total impaired loans		105,993	$ 98,283
Average recorded investment in impaired loans		88,643	84,338
Interest income recognized on impaired loans	842	3,070	3,762
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	31,202	25,447		25,447
Nonaccrual loans with no allowance	409
Loans 90 days past due and accruing	585
Amortized cost basis of collateral-dependent loans	1,368
Total impaired loans		33,918	35,723
Average recorded investment in impaired loans		32,180	33,824
Interest income recognized on impaired loans		1,235	1,656
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	48,790	43,423		43,423
Nonaccrual loans with no allowance	22,431
Loans 90 days past due and accruing	0
Amortized cost basis of collateral-dependent loans	97,671
Total impaired loans		72,075	62,560
Average recorded investment in impaired loans		56,463	50,514
Interest income recognized on impaired loans		1,835	2,106
Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	15,923	14,476		14,476
Nonaccrual loans with no allowance	0
Loans 90 days past due and accruing	0
Amortized cost basis of collateral-dependent loans	1,269
Total impaired loans		21,293	22,508
Average recorded investment in impaired loans		19,767	20,733
Interest income recognized on impaired loans		688	910
Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	8,872	6,745		6,745
Nonaccrual loans with no allowance	252
Loans 90 days past due and accruing	0
Amortized cost basis of collateral-dependent loans	99
Total impaired loans		8,399	8,893
Average recorded investment in impaired loans		8,571	9,075
Interest income recognized on impaired loans		368	511
Vehicle loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	5,377			3,147
Nonaccrual loans with no allowance	156
Loans 90 days past due and accruing	1
Consumer loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	1,030			1,079
Nonaccrual loans with no allowance	1
Loans 90 days past due and accruing	584
Total impaired loans		4,226	4,322
Average recorded investment in impaired loans		3,842	4,016
Interest income recognized on impaired loans		179	235
Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	27,079			18,832
Nonaccrual loans with no allowance	17,013
Loans 90 days past due and accruing	0
Amortized cost basis of collateral-dependent loans	83,092
Total impaired loans		46,126	49,919
Average recorded investment in impaired loans		46,284	41,328
Interest income recognized on impaired loans		1,490	1,599
Commercial real estate loans - owner occupied | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,642			16,032
Nonaccrual loans with no allowance	0
Loans 90 days past due and accruing	0
Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	18,069	8,559		$ 8,559
Nonaccrual loans with no allowance	5,418
Loans 90 days past due and accruing	0
Amortized cost basis of collateral-dependent loans	14,579
Total impaired loans		25,949	12,641
Average recorded investment in impaired loans		10,179	9,186
Interest income recognized on impaired loans		345	507
Nonaccrual loans 90 or more days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		51,680	50,730
Nonaccrual loans 90 or more days delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		21,927	22,211
Nonaccrual loans 90 or more days delinquent | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		29,753	28,519
Nonaccrual loans 90 or more days delinquent | Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		12,682	12,965
Nonaccrual loans 90 or more days delinquent | Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		5,635	5,996
Nonaccrual loans 90 or more days delinquent | Consumer loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		3,610	3,250
Nonaccrual loans 90 or more days delinquent | Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		25,014	25,509
Nonaccrual loans 90 or more days delinquent | Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		4,739	3,010
Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		17,190	21,551
Loans less than 90 days delinquent reviewed for impairment		16,849	11,002
TDRs less than 90 days delinquent not included elsewhere		20,274	15,000
Less than 90 days delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		3,520	5,034
Loans less than 90 days delinquent reviewed for impairment		0	0
TDRs less than 90 days delinquent not included elsewhere		8,471	8,478
Less than 90 days delinquent | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		13,670	16,517
Loans less than 90 days delinquent reviewed for impairment		16,849	11,002
TDRs less than 90 days delinquent not included elsewhere		11,803	6,522
Less than 90 days delinquent | Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		1,794	2,883
Loans less than 90 days delinquent reviewed for impairment		0	0
TDRs less than 90 days delinquent not included elsewhere		6,817	6,660
Less than 90 days delinquent | Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		1,110	1,079
Loans less than 90 days delinquent reviewed for impairment		0	0
TDRs less than 90 days delinquent not included elsewhere		1,654	1,818
Less than 90 days delinquent | Consumer loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		616	1,072
Loans less than 90 days delinquent reviewed for impairment		0	0
TDRs less than 90 days delinquent not included elsewhere		0	0
Less than 90 days delinquent | Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		9,850	11,426
Loans less than 90 days delinquent reviewed for impairment		933	8,549
TDRs less than 90 days delinquent not included elsewhere		10,329	4,435
Less than 90 days delinquent | Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans		3,820	5,091
Loans less than 90 days delinquent reviewed for impairment		15,916	2,453
TDRs less than 90 days delinquent not included elsewhere		$ 1,474	$ 2,087
Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	84,073
Real estate | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,368
Real estate | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	82,705
Real estate | Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,269
Real estate | Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	99
Real estate | Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	79,392
Real estate | Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	3,313
Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,194
Equipment | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Equipment | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,194
Equipment | Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Equipment | Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Equipment | Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,997
Equipment | Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	197
Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	12,772
Other | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Other | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	12,772
Other | Residential mortgage loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Other | Home equity loans | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0
Other | Commercial real estate loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,703
Other | Commercial loans | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	$ 11,069

Loans Receivable - Evaluation o

Loans Receivable - Evaluation of Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	$ 8,739,372	$ 7,997,835
Loans individually evaluated for impairment	69,302	53,604
Loans individually evaluated for impairment for which there is a related impairment reserve	57,999	48,875
Related impairment reserve	11,762	8,542
Loans individually evaluated for impairment for which there is no related reserve	11,303	4,729
Personal Banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	5,326,093	4,972,298
Loans individually evaluated for impairment	10,084	10,307
Loans individually evaluated for impairment for which there is a related impairment reserve	10,084	10,307
Related impairment reserve	956	1,276
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Residential mortgage loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	2,860,026	2,856,359
Loans individually evaluated for impairment	8,101	8,111
Loans individually evaluated for impairment for which there is a related impairment reserve	8,101	8,111
Related impairment reserve	560	747
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Home equity loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	1,340,944	1,256,255
Loans individually evaluated for impairment	1,974	2,167
Loans individually evaluated for impairment for which there is a related impairment reserve	1,974	2,167
Related impairment reserve	393	523
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Consumer loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	1,125,123	859,684
Loans individually evaluated for impairment	9	29
Loans individually evaluated for impairment for which there is a related impairment reserve	9	29
Related impairment reserve	3	6
Loans individually evaluated for impairment for which there is no related reserve	0	0
Commercial Banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	3,413,279	3,025,537
Loans individually evaluated for impairment	59,218	43,297
Loans individually evaluated for impairment for which there is a related impairment reserve	47,915	38,568
Related impairment reserve	10,806	7,266
Loans individually evaluated for impairment for which there is no related reserve	11,303	4,729
Commercial Banking | Commercial real estate loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	2,718,855	2,436,605
Loans individually evaluated for impairment	35,535	35,216
Loans individually evaluated for impairment for which there is a related impairment reserve	29,578	31,830
Related impairment reserve	2,679	6,499
Loans individually evaluated for impairment for which there is no related reserve	5,957	3,386
Commercial Banking | Commercial loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	694,424	588,932
Loans individually evaluated for impairment	23,683	8,081
Loans individually evaluated for impairment for which there is a related impairment reserve	18,337	6,738
Related impairment reserve	8,127	767
Loans individually evaluated for impairment for which there is no related reserve	$ 5,346	$ 1,343

Loans Receivable - Roll Forward

Loans Receivable - Roll Forward of Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract
Number of contract
Beginning balance | contract	176	195
Number of contracts new TDRs | contract	14	14
Number of re-modified TDRs | contract	5	8
Number of contracts net paydowns	0	0
Ending balance | contract	170	176
Roll forward of troubled debt restructurings
Beginning TDR balance:	$ 31,999,000	$ 33,608,000
New TDRs	1,497,000	3,344,000
Re-modified TDRs	9,693,000	5,678,000
Net paydowns	(9,806,000)	(7,806,000)
Ending TDR balance:	32,135,000	31,999,000
Accruing TDRs	21,431,000	22,956,000
Nonaccrual TDRs	$ 10,704,000	$ 9,043,000
Residential mortgage loans
Number of contract
Number of contracts charged off | contract	0	0
Number of contracts paid off | contract	2	5
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ 0	$ 0
Amount of contracts paid off	$ (330,000)	$ (225,000)
Home equity loans
Number of contract
Number of contracts charged off | contract	1	0
Number of contracts paid off | contract	5	9
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ (10,000)	$ 0
Amount of contracts paid off	$ (44,000)	$ (196,000)
Vehicle loans
Number of contract
Number of contracts charged off | contract	0	0
Number of contracts paid off | contract	0	0
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ 0	$ 0
Amount of contracts paid off	$ 0	$ 0
Commercial real estate loans
Number of contract
Number of contracts charged off | contract	0	0
Number of contracts paid off | contract	3	12
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ 0	$ 0
Amount of contracts paid off	$ (321,000)	$ (2,122,000)
Commercial real estate loans - owner occupied
Number of contract
Number of contracts charged off | contract	0	0
Number of contracts paid off | contract	2	0
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ 0	$ 0
Amount of contracts paid off	$ (324,000)	$ 0
Commercial loans
Number of contract
Number of contracts charged off | contract	0	2
Number of contracts paid off | contract	7	5
Roll forward of troubled debt restructurings
Amount of contracts charged off	$ 0	$ (235,000)
Amount of contracts paid off	$ (219,000)	$ (47,000)

Loans Receivable - Troubled Deb

Loans Receivable - Troubled Debt Restructuring (Including Re-Modified TDRs) by Portfolio Segment and by Class of Financing Receivable (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	18	22	35,000
Recorded investment at the time of modification	$ 10,543	$ 9,022	$ 4,886
Current recorded investment	8,238	8,023	4,815
Current allowance	$ 373	$ 665	$ 460
Personal Banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	3	8	26,000
Recorded investment at the time of modification	$ 176	$ 468	$ 1,390
Current recorded investment	167	462	1,359
Current allowance	$ 14	$ 31	$ 222
Personal Banking | Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	3	9,000
Recorded investment at the time of modification	$ 90	$ 297	$ 754
Current recorded investment	88	297	749
Current allowance	$ 5	$ 19	$ 72
Personal Banking | Home equity loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	2	5	17,000
Recorded investment at the time of modification	$ 86	$ 171	$ 636
Current recorded investment	79	165	610
Current allowance	$ 9	$ 12	$ 150
Personal Banking | Vehicle loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0
Personal Banking | Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0
Commercial Banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	15	14	9,000
Recorded investment at the time of modification	$ 10,367	$ 8,554	$ 3,496
Current recorded investment	8,071	7,561	3,456
Current allowance	$ 359	$ 634	$ 238
Commercial Banking | Commercial real estate loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	9	10	5,000
Recorded investment at the time of modification	$ 7,365	$ 8,333	$ 3,157
Current recorded investment	7,615	7,369	3,114
Current allowance	$ 311	$ 613	$ 169
Commercial Banking | Commercial real estate loans - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1
Recorded investment at the time of modification	$ 58
Current recorded investment	48
Current allowance	$ 8
Commercial Banking | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	5	4	4,000
Recorded investment at the time of modification	$ 2,944	$ 221	$ 339
Current recorded investment	408	192	342
Current allowance	$ 40	$ 21	$ 69

Loans Receivable - Troubled D_2

Loans Receivable - Troubled Debt Restructurings by Type of Modification (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract	Dec. 31, 2018contract
Troubled debt restructurings
Number of contracts | contract	18	22	35,000
Type of modification	$ 8,238	$ 8,023
Number of re-modified TDRs | contract	5	8
Type of re-modification	$ 6,780	$ 4,705
Rate
Troubled debt restructurings
Type of modification	65	146
Type of re-modification	0	0
Payment
Troubled debt restructurings
Type of modification	111	2,541
Type of re-modification	0	219
Maturity date
Troubled debt restructurings
Type of modification	7,702	5,336
Type of re-modification	6,700	4,486
Other
Troubled debt restructurings
Type of modification	360	0
Type of re-modification	$ 80	$ 0
Personal Banking
Troubled debt restructurings
Number of contracts | contract	3	8	26,000
Type of modification	$ 167	$ 462
Number of re-modified TDRs | contract	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Rate
Troubled debt restructurings
Type of modification	65	109
Type of re-modification	0	0
Personal Banking | Payment
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	0	0
Personal Banking | Maturity date
Troubled debt restructurings
Type of modification	102	353
Type of re-modification	0	0
Personal Banking | Other
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Residential mortgage loans
Troubled debt restructurings
Number of contracts | contract	1	3	9,000
Type of modification	$ 88	$ 297
Number of re-modified TDRs | contract	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Residential mortgage loans | Rate
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	0	0
Personal Banking | Residential mortgage loans | Payment
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	0	0
Personal Banking | Residential mortgage loans | Maturity date
Troubled debt restructurings
Type of modification	88	297
Type of re-modification	0	0
Personal Banking | Residential mortgage loans | Other
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Home equity loans
Troubled debt restructurings
Number of contracts | contract	2	5	17,000
Type of modification	$ 79	$ 165
Number of re-modified TDRs | contract	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Home equity loans | Rate
Troubled debt restructurings
Type of modification	65	109
Type of re-modification	0	0
Personal Banking | Home equity loans | Payment
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	0	0
Personal Banking | Home equity loans | Maturity date
Troubled debt restructurings
Type of modification	14	56
Type of re-modification	0	0
Personal Banking | Home equity loans | Other
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	$ 0	$ 0
Personal Banking | Vehicle loans
Troubled debt restructurings
Number of contracts | contract	0
Type of modification	$ 0
Number of re-modified TDRs | contract	0
Type of re-modification	$ 0
Personal Banking | Vehicle loans | Rate
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Vehicle loans | Payment
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Vehicle loans | Maturity date
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Vehicle loans | Other
Troubled debt restructurings
Type of modification	0
Type of re-modification	$ 0
Personal Banking | Consumer loans
Troubled debt restructurings
Number of contracts | contract	0
Type of modification	$ 0
Number of re-modified TDRs | contract	0
Type of re-modification	$ 0
Personal Banking | Consumer loans | Rate
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Consumer loans | Payment
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Consumer loans | Maturity date
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Personal Banking | Consumer loans | Other
Troubled debt restructurings
Type of modification	0
Type of re-modification	$ 0
Commercial Banking
Troubled debt restructurings
Number of contracts | contract	15	14	9,000
Type of modification	$ 8,071	$ 7,561
Number of re-modified TDRs | contract	5	8
Type of re-modification	$ 6,780	$ 4,705
Commercial Banking | Rate
Troubled debt restructurings
Type of modification	0	37
Type of re-modification	0	0
Commercial Banking | Payment
Troubled debt restructurings
Type of modification	111	2,541
Type of re-modification	0	219
Commercial Banking | Maturity date
Troubled debt restructurings
Type of modification	7,600	4,983
Type of re-modification	6,700	4,486
Commercial Banking | Other
Troubled debt restructurings
Type of modification	360	0
Type of re-modification	$ 80	$ 0
Commercial Banking | Commercial real estate loans
Troubled debt restructurings
Number of contracts | contract	9	10	5,000
Type of modification	$ 7,615	$ 7,369
Number of re-modified TDRs | contract	3	7
Type of re-modification	$ 6,652	$ 4,667
Commercial Banking | Commercial real estate loans | Rate
Troubled debt restructurings
Type of modification	0	0
Type of re-modification	0	0
Commercial Banking | Commercial real estate loans | Payment
Troubled debt restructurings
Type of modification	0	2,541
Type of re-modification	0	219
Commercial Banking | Commercial real estate loans | Maturity date
Troubled debt restructurings
Type of modification	7,335	4,828
Type of re-modification	6,652	4,448
Commercial Banking | Commercial real estate loans | Other
Troubled debt restructurings
Type of modification	280	0
Type of re-modification	$ 0	$ 0
Commercial Banking | Commercial real estate loans - owner occupied
Troubled debt restructurings
Number of contracts | contract	1
Type of modification	$ 48
Number of re-modified TDRs | contract	1
Type of re-modification	$ 48
Commercial Banking | Commercial real estate loans - owner occupied | Rate
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Commercial Banking | Commercial real estate loans - owner occupied | Payment
Troubled debt restructurings
Type of modification	0
Type of re-modification	0
Commercial Banking | Commercial real estate loans - owner occupied | Maturity date
Troubled debt restructurings
Type of modification	48
Type of re-modification	48
Commercial Banking | Commercial real estate loans - owner occupied | Other
Troubled debt restructurings
Type of modification	0
Type of re-modification	$ 0
Commercial Banking | Commercial loans
Troubled debt restructurings
Number of contracts | contract	5	4	4,000
Type of modification	$ 408	$ 192
Number of re-modified TDRs | contract	1	1
Type of re-modification	$ 80	$ 38
Commercial Banking | Commercial loans | Rate
Troubled debt restructurings
Type of modification	0	37
Type of re-modification	0	0
Commercial Banking | Commercial loans | Payment
Troubled debt restructurings
Type of modification	111	0
Type of re-modification	0	0
Commercial Banking | Commercial loans | Maturity date
Troubled debt restructurings
Type of modification	217	155
Type of re-modification	0	38
Commercial Banking | Commercial loans | Other
Troubled debt restructurings
Type of modification	80	0
Type of re-modification	$ 80	$ 0

Loans Receivable - Loan Delinqu

Loans Receivable - Loan Delinquencies (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loan payment delinquencies
Total delinquency	$ 135,022	$ 119,401
Current	10,445,827	8,689,273
Total loans receivable	10,580,849	8,808,674
90 days or greater delinquent and accruing	585	147
Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	61,462	48,081
Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	11,960	19,493
Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	61,600	51,827
Personal Banking
Loan payment delinquencies
Total delinquency	82,603
Current	5,961,247
Total loans receivable	6,043,850
90 days or greater delinquent and accruing	585
Personal Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	44,134
Personal Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	9,481
Personal Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	28,988
Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	48,369
Current	3,019,752
Total loans receivable	3,068,121
90 days or greater delinquent and accruing	0
Personal Banking | Residential mortgage loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	28,797
Personal Banking | Residential mortgage loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	5,083
Personal Banking | Residential mortgage loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	14,489
Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency	14,860
Current	1,452,876
Total loans receivable	1,467,736
90 days or greater delinquent and accruing	0
Personal Banking | Home equity loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	4,763
Personal Banking | Home equity loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	1,656
Personal Banking | Home equity loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	8,441
Personal Banking | Vehicle loans
Loan payment delinquencies
Total delinquency	14,082
Current	1,138,592
Total loans receivable	1,152,674
90 days or greater delinquent and accruing	1
Personal Banking | Vehicle loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	7,707
Personal Banking | Vehicle loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	1,776
Personal Banking | Vehicle loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	4,599
Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency	5,292
Current	350,027
Total loans receivable	355,319
90 days or greater delinquent and accruing	584
Personal Banking | Consumer loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	2,867
Personal Banking | Consumer loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	966
Personal Banking | Consumer loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	1,459
Commercial Banking
Loan payment delinquencies
Total delinquency	52,419
Current	4,484,580
Total loans receivable	4,536,999
90 days or greater delinquent and accruing	0
Commercial Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	17,328
Commercial Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	2,479
Commercial Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	32,612
Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	31,614
Current	2,816,366
Total loans receivable	2,847,980
90 days or greater delinquent and accruing	0
Commercial Banking | Commercial real estate loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	6,692
Commercial Banking | Commercial real estate loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	1,615
Commercial Banking | Commercial real estate loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	23,307
Commercial Banking | Commercial real estate loans - owner occupied
Loan payment delinquencies
Total delinquency	6,211
Current	491,698
Total loans receivable	497,909
90 days or greater delinquent and accruing	0
Commercial Banking | Commercial real estate loans - owner occupied | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	4,231
Commercial Banking | Commercial real estate loans - owner occupied | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	0
Commercial Banking | Commercial real estate loans - owner occupied | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	1,980
Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency	14,594
Current	1,176,516
Total loans receivable	1,191,110
90 days or greater delinquent and accruing	0
Commercial Banking | Commercial loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	6,405
Commercial Banking | Commercial loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency	864
Commercial Banking | Commercial loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency	$ 7,325
Originated
Loan payment delinquencies
Total delinquency		101,108
Current		7,885,949
Total loans receivable		7,987,057
90 days or greater delinquent and accruing		0
Originated | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		41,120
Originated | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		18,613
Originated | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		41,375
Originated | Personal Banking
Loan payment delinquencies
Total delinquency		64,521
Current		4,909,329
Total loans receivable		4,973,850
90 days or greater delinquent and accruing		0
Originated | Personal Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		34,535
Originated | Personal Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		10,866
Originated | Personal Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		19,120
Originated | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency		37,099
Current		2,748,090
Total loans receivable		2,785,189
90 days or greater delinquent and accruing		0
Originated | Personal Banking | Residential mortgage loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		20,447
Originated | Personal Banking | Residential mortgage loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		5,572
Originated | Personal Banking | Residential mortgage loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		11,080
Originated | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency		11,788
Current		1,087,726
Total loans receivable		1,099,514
90 days or greater delinquent and accruing		0
Originated | Personal Banking | Home equity loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		5,119
Originated | Personal Banking | Home equity loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		2,096
Originated | Personal Banking | Home equity loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		4,573
Originated | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency		15,634
Current		1,073,513
Total loans receivable		1,089,147
90 days or greater delinquent and accruing		0
Originated | Personal Banking | Consumer loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		8,969
Originated | Personal Banking | Consumer loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		3,198
Originated | Personal Banking | Consumer loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		3,467
Originated | Commercial Banking
Loan payment delinquencies
Total delinquency		36,587
Current		2,976,620
Total loans receivable		3,013,207
90 days or greater delinquent and accruing		0
Originated | Commercial Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		6,585
Originated | Commercial Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		7,747
Originated | Commercial Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		22,255
Originated | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency		24,944
Current		2,324,104
Total loans receivable		2,349,048
90 days or greater delinquent and accruing		0
Originated | Commercial Banking | Commercial real estate loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		5,598
Originated | Commercial Banking | Commercial real estate loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		1,387
Originated | Commercial Banking | Commercial real estate loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		17,959
Originated | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency		11,643
Current		652,516
Total loans receivable		664,159
90 days or greater delinquent and accruing		0
Originated | Commercial Banking | Commercial loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		987
Originated | Commercial Banking | Commercial loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		6,360
Originated | Commercial Banking | Commercial loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		4,296
Acquired
Loan payment delinquencies
Total delinquency		18,293
Current		803,324
Total loans receivable		821,617
90 days or greater delinquent and accruing		147
Acquired | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		6,961
Acquired | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		880
Acquired | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		10,452
Acquired | Personal Banking
Loan payment delinquencies
Total delinquency		7,926
Current		354,401
Total loans receivable		362,327
90 days or greater delinquent and accruing		147
Acquired | Personal Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		4,438
Acquired | Personal Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		534
Acquired | Personal Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		2,954
Acquired | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency		4,665
Current		78,273
Total loans receivable		82,938
90 days or greater delinquent and accruing		93
Acquired | Personal Banking | Residential mortgage loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		2,849
Acquired | Personal Banking | Residential mortgage loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		121
Acquired | Personal Banking | Residential mortgage loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		1,695
Acquired | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency		2,774
Current		240,630
Total loans receivable		243,404
90 days or greater delinquent and accruing		53
Acquired | Personal Banking | Home equity loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		1,350
Acquired | Personal Banking | Home equity loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		309
Acquired | Personal Banking | Home equity loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		1,115
Acquired | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency		487
Current		35,498
Total loans receivable		35,985
90 days or greater delinquent and accruing		1
Acquired | Personal Banking | Consumer loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		239
Acquired | Personal Banking | Consumer loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		104
Acquired | Personal Banking | Consumer loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		144
Acquired | Commercial Banking
Loan payment delinquencies
Total delinquency		10,367
Current		448,923
Total loans receivable		459,290
90 days or greater delinquent and accruing		0
Acquired | Commercial Banking | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		2,523
Acquired | Commercial Banking | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		346
Acquired | Commercial Banking | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		7,498
Acquired | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency		9,681
Current		395,661
Total loans receivable		405,342
90 days or greater delinquent and accruing		0
Acquired | Commercial Banking | Commercial real estate loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		2,323
Acquired | Commercial Banking | Commercial real estate loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		303
Acquired | Commercial Banking | Commercial real estate loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		7,055
Acquired | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency		686
Current		53,262
Total loans receivable		53,948
90 days or greater delinquent and accruing		0
Acquired | Commercial Banking | Commercial loans | Financial Asset, 30 to 59 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		200
Acquired | Commercial Banking | Commercial loans | Financial Asset, 60 to 89 Days Past Due [Member]
Loan payment delinquencies
Total delinquency		43
Acquired | Commercial Banking | Commercial loans | Nonaccrual loans 90 or more days delinquent
Loan payment delinquencies
Total delinquency		$ 443

Loans Receivable - Credit Quali

Loans Receivable - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Credit quality indicators
Year to date December 31, 2020	$ 2,430,289
2019	1,729,845
2018	1,128,885
2017	919,058
2016	689,542
Prior	2,616,425
Revolving loans	916,515
Revolving loans converted to term loans	150,290
Total loans receivable, gross	10,580,849	$ 8,808,674
Previously Reported
Credit quality indicators
Total loans receivable, gross		8,808,674
Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		8,471,224
Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		122,950
Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		214,500
Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Personal Banking
Credit quality indicators
Year to date December 31, 2020	1,493,070
2019	1,050,211
2018	581,626
2017	426,061
2016	338,820
Prior	1,573,084
Revolving loans	536,613
Revolving loans converted to term loans	44,365
Total loans receivable, gross	6,043,850	5,336,177
Personal Banking | Residential mortgage loans
Credit quality indicators
Year to date December 31, 2020	641,963
2019	418,125
2018	230,770
2017	249,100
2016	216,984
Prior	1,311,179
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	3,068,121	2,868,127
Personal Banking | Residential mortgage loans | Pass
Credit quality indicators
Year to date December 31, 2020	641,963
2019	418,057
2018	229,477
2017	247,426
2016	215,893
Prior	1,289,728
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	3,042,544
Personal Banking | Residential mortgage loans | Substandard
Credit quality indicators
Year to date December 31, 2020	0
2019	68
2018	1,293
2017	1,674
2016	1,091
Prior	21,451
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	25,577
Personal Banking | Home equity loans
Credit quality indicators
Year to date December 31, 2020	273,076
2019	193,649
2018	95,075
2017	87,998
2016	82,088
Prior	224,219
Revolving loans	468,962
Revolving loans converted to term loans	42,669
Total loans receivable, gross	1,467,736	1,342,918
Personal Banking | Home equity loans | Pass
Credit quality indicators
Year to date December 31, 2020	273,076
2019	193,439
2018	94,757
2017	87,717
2016	81,212
Prior	219,061
Revolving loans	465,453
Revolving loans converted to term loans	40,759
Total loans receivable, gross	1,455,474
Personal Banking | Home equity loans | Substandard
Credit quality indicators
Year to date December 31, 2020	0
2019	210
2018	318
2017	281
2016	876
Prior	5,158
Revolving loans	3,509
Revolving loans converted to term loans	1,910
Total loans receivable, gross	12,262
Personal Banking | Vehicle loans
Credit quality indicators
Year to date December 31, 2020	449,089
2019	354,619
2018	220,459
2017	71,332
2016	31,864
Prior	25,310
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	1,152,673	861,192
Personal Banking | Vehicle loans | Pass
Credit quality indicators
Year to date December 31, 2020	448,746
2019	352,661
2018	218,372
2017	70,122
2016	31,197
Prior	24,791
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	1,145,889
Personal Banking | Vehicle loans | Substandard
Credit quality indicators
Year to date December 31, 2020	343
2019	1,958
2018	2,087
2017	1,210
2016	667
Prior	519
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	6,784
Personal Banking | Consumer loans
Credit quality indicators
Year to date December 31, 2020	128,942
2019	83,818
2018	35,322
2017	17,631
2016	7,884
Prior	12,376
Revolving loans	67,651
Revolving loans converted to term loans	1,696
Total loans receivable, gross	355,320	263,940
Personal Banking | Consumer loans | Pass
Credit quality indicators
Year to date December 31, 2020	128,809
2019	83,419
2018	35,183
2017	17,439
2016	7,848
Prior	11,757
Revolving loans	66,965
Revolving loans converted to term loans	1,695
Total loans receivable, gross	353,115
Personal Banking | Consumer loans | Substandard
Credit quality indicators
Year to date December 31, 2020	133
2019	399
2018	139
2017	192
2016	36
Prior	619
Revolving loans	686
Revolving loans converted to term loans	1
Total loans receivable, gross	2,205
Commercial Banking
Credit quality indicators
Year to date December 31, 2020	937,219
2019	679,634
2018	547,259
2017	492,997
2016	350,722
Prior	1,043,341
Revolving loans	379,902
Revolving loans converted to term loans	105,925
Total loans receivable, gross	4,536,999	3,472,497
Commercial Banking | Commercial real estate loans
Credit quality indicators
Year to date December 31, 2020	425,400
2019	480,503
2018	393,919
2017	346,368
2016	234,648
Prior	865,423
Revolving loans	39,817
Revolving loans converted to term loans	61,903
Total loans receivable, gross	2,847,981	2,228,109
Commercial Banking | Commercial real estate loans | Pass
Credit quality indicators
Year to date December 31, 2020	417,390
2019	473,115
2018	316,045
2017	264,702
2016	195,168
Prior	709,459
Revolving loans	36,980
Revolving loans converted to term loans	29,755
Total loans receivable, gross	2,442,614
Commercial Banking | Commercial real estate loans | Special Mention
Credit quality indicators
Year to date December 31, 2020	584
2019	3,381
2018	20,180
2017	24,675
2016	15,424
Prior	15,817
Revolving loans	597
Revolving loans converted to term loans	3,048
Total loans receivable, gross	83,706
Commercial Banking | Commercial real estate loans | Substandard
Credit quality indicators
Year to date December 31, 2020	7,426
2019	4,007
2018	57,694
2017	56,991
2016	24,056
Prior	140,147
Revolving loans	2,240
Revolving loans converted to term loans	29,100
Total loans receivable, gross	321,661
Commercial Banking | Commercial real estate loans - owner occupied
Credit quality indicators
Year to date December 31, 2020	24,895
2019	93,160
2018	93,914
2017	88,167
2016	55,049
Prior	125,547
Revolving loans	9,118
Revolving loans converted to term loans	8,058
Total loans receivable, gross	497,908	526,281
Commercial Banking | Commercial real estate loans - owner occupied | Pass
Credit quality indicators
Year to date December 31, 2020	24,895
2019	67,162
2018	87,497
2017	71,626
2016	46,760
Prior	100,081
Revolving loans	4,422
Revolving loans converted to term loans	7,648
Total loans receivable, gross	410,091
Commercial Banking | Commercial real estate loans - owner occupied | Special Mention
Credit quality indicators
Year to date December 31, 2020	0
2019	4,371
2018	4,514
2017	3,643
2016	4,276
Prior	3,689
Revolving loans	3,822
Revolving loans converted to term loans	0
Total loans receivable, gross	24,315
Commercial Banking | Commercial real estate loans - owner occupied | Substandard
Credit quality indicators
Year to date December 31, 2020	0
2019	21,627
2018	1,903
2017	12,898
2016	4,013
Prior	21,777
Revolving loans	874
Revolving loans converted to term loans	410
Total loans receivable, gross	63,502
Commercial Banking | Commercial loans
Credit quality indicators
Year to date December 31, 2020	486,924
2019	105,971
2018	59,426
2017	58,462
2016	61,025
Prior	52,371
Revolving loans	330,967
Revolving loans converted to term loans	35,964
Total loans receivable, gross	1,191,110	718,107
Commercial Banking | Commercial loans | Pass
Credit quality indicators
Year to date December 31, 2020	479,436
2019	99,877
2018	50,915
2017	51,858
2016	58,597
Prior	49,178
Revolving loans	286,467
Revolving loans converted to term loans	16,170
Total loans receivable, gross	1,092,498
Commercial Banking | Commercial loans | Special Mention
Credit quality indicators
Year to date December 31, 2020	5,828
2019	2,751
2018	5,579
2017	4,588
2016	162
Prior	190
Revolving loans	16,512
Revolving loans converted to term loans	5,668
Total loans receivable, gross	41,278
Commercial Banking | Commercial loans | Substandard
Credit quality indicators
Year to date December 31, 2020	1,660
2019	3,343
2018	2,932
2017	2,016
2016	2,266
Prior	3,003
Revolving loans	27,988
Revolving loans converted to term loans	14,126
Total loans receivable, gross	57,334
Originated
Credit quality indicators
Total loans receivable, gross	8,799,008	7,987,057
Originated | Previously Reported
Credit quality indicators
Total loans receivable, gross		7,987,057
Originated | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		7,715,665
Originated | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		112,679
Originated | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		158,713
Originated | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking
Credit quality indicators
Total loans receivable, gross	5,212,402	4,973,850
Originated | Personal Banking | Previously Reported
Credit quality indicators
Total loans receivable, gross		4,973,850
Originated | Personal Banking | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		4,955,831
Originated | Personal Banking | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		18,019
Originated | Personal Banking | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans receivable, gross	2,753,593	2,785,189
Originated | Personal Banking | Residential mortgage loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,785,189
Originated | Personal Banking | Residential mortgage loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,776,971
Originated | Personal Banking | Residential mortgage loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Residential mortgage loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		8,218
Originated | Personal Banking | Residential mortgage loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Residential mortgage loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Home equity loans
Credit quality indicators
Total loans receivable, gross	1,175,703	1,099,514
Originated | Personal Banking | Home equity loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,099,514
Originated | Personal Banking | Home equity loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,093,874
Originated | Personal Banking | Home equity loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Home equity loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		5,640
Originated | Personal Banking | Home equity loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Home equity loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Vehicle loans
Credit quality indicators
Total loans receivable, gross	995,040	850,804
Originated | Personal Banking | Consumer loans
Credit quality indicators
Total loans receivable, gross	288,066	238,343
Originated | Personal Banking | Consumer loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,089,147
Originated | Personal Banking | Consumer loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,084,986
Originated | Personal Banking | Consumer loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Consumer loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		4,161
Originated | Personal Banking | Consumer loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Personal Banking | Consumer loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking
Credit quality indicators
Total loans receivable, gross	3,586,606	3,013,207
Originated | Commercial Banking | Previously Reported
Credit quality indicators
Total loans receivable, gross		3,013,207
Originated | Commercial Banking | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,759,834
Originated | Commercial Banking | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		112,679
Originated | Commercial Banking | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		140,694
Originated | Commercial Banking | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans receivable, gross	2,223,108	1,915,949
Originated | Commercial Banking | Commercial real estate loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,349,048
Originated | Commercial Banking | Commercial real estate loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,188,823
Originated | Commercial Banking | Commercial real estate loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		70,327
Originated | Commercial Banking | Commercial real estate loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		89,898
Originated | Commercial Banking | Commercial real estate loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking | Commercial real estate loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking | Commercial real estate loans - owner occupied
Credit quality indicators
Total loans receivable, gross	344,016	433,099
Originated | Commercial Banking | Commercial loans
Credit quality indicators
Total loans receivable, gross	1,019,482	664,159
Originated | Commercial Banking | Commercial loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		664,159
Originated | Commercial Banking | Commercial loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		571,011
Originated | Commercial Banking | Commercial loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		42,352
Originated | Commercial Banking | Commercial loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		50,796
Originated | Commercial Banking | Commercial loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Originated | Commercial Banking | Commercial loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired
Credit quality indicators
Total loans receivable, gross	1,781,841	821,617
Acquired | Previously Reported
Credit quality indicators
Total loans receivable, gross		821,617
Acquired | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		755,559
Acquired | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		10,271
Acquired | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		55,787
Acquired | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking
Credit quality indicators
Total loans receivable, gross	831,448	362,327
Acquired | Personal Banking | Previously Reported
Credit quality indicators
Total loans receivable, gross		362,327
Acquired | Personal Banking | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		359,594
Acquired | Personal Banking | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		2,733
Acquired | Personal Banking | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans receivable, gross	314,528	82,938
Acquired | Personal Banking | Residential mortgage loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		82,938
Acquired | Personal Banking | Residential mortgage loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		81,611
Acquired | Personal Banking | Residential mortgage loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Residential mortgage loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,327
Acquired | Personal Banking | Residential mortgage loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Residential mortgage loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Home equity loans
Credit quality indicators
Total loans receivable, gross	292,033	243,404
Acquired | Personal Banking | Home equity loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		243,404
Acquired | Personal Banking | Home equity loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		242,237
Acquired | Personal Banking | Home equity loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Home equity loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		1,167
Acquired | Personal Banking | Home equity loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Home equity loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Vehicle loans
Credit quality indicators
Total loans receivable, gross	157,633	10,388
Acquired | Personal Banking | Consumer loans
Credit quality indicators
Total loans receivable, gross	67,254	25,597
Acquired | Personal Banking | Consumer loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		35,985
Acquired | Personal Banking | Consumer loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		35,746
Acquired | Personal Banking | Consumer loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Consumer loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		239
Acquired | Personal Banking | Consumer loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Personal Banking | Consumer loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking
Credit quality indicators
Total loans receivable, gross	950,393	459,290
Acquired | Commercial Banking | Previously Reported
Credit quality indicators
Total loans receivable, gross		459,290
Acquired | Commercial Banking | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		395,965
Acquired | Commercial Banking | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		10,271
Acquired | Commercial Banking | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		53,054
Acquired | Commercial Banking | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans receivable, gross	624,873	312,160
Acquired | Commercial Banking | Commercial real estate loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		405,342
Acquired | Commercial Banking | Commercial real estate loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		349,993
Acquired | Commercial Banking | Commercial real estate loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		10,243
Acquired | Commercial Banking | Commercial real estate loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		45,106
Acquired | Commercial Banking | Commercial real estate loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking | Commercial real estate loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking | Commercial real estate loans - owner occupied
Credit quality indicators
Total loans receivable, gross	153,892	93,182
Acquired | Commercial Banking | Commercial loans
Credit quality indicators
Total loans receivable, gross	$ 171,628	53,948
Acquired | Commercial Banking | Commercial loans | Previously Reported
Credit quality indicators
Total loans receivable, gross		53,948
Acquired | Commercial Banking | Commercial loans | Pass | Previously Reported
Credit quality indicators
Total loans receivable, gross		45,972
Acquired | Commercial Banking | Commercial loans | Special Mention | Previously Reported
Credit quality indicators
Total loans receivable, gross		28
Acquired | Commercial Banking | Commercial loans | Substandard | Previously Reported
Credit quality indicators
Total loans receivable, gross		7,948
Acquired | Commercial Banking | Commercial loans | Doubtful | Previously Reported
Credit quality indicators
Total loans receivable, gross		0
Acquired | Commercial Banking | Commercial loans | Loss | Previously Reported
Credit quality indicators
Total loans receivable, gross		$ 0

Loans Receivable - Off-Balance

Loans Receivable - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial instruments with off-balance-sheet risk
Financial instruments with off-balance-sheet risk	$ 1,341,106	$ 1,191,601
Loans commitments
Financial instruments with off-balance-sheet risk
Financial instruments with off-balance-sheet risk	251,145	234,137
Undisbursed lines of credit
Financial instruments with off-balance-sheet risk
Financial instruments with off-balance-sheet risk	1,044,824	917,161
Standby letters of credit
Financial instruments with off-balance-sheet risk
Financial instruments with off-balance-sheet risk	$ 45,137	$ 40,303

Loans Receivable - Mortgage Ser

Loans Receivable - Mortgage Servicing Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Servicing rights
Servicing rights, beginning balance	$ 1,848	$ 2,103
Additions	9,549	862
Amortization	(2,740)	(1,117)
Servicing rights, ending balance	8,657	1,848
Valuation allowance
Valuation allowance, beginning balance	(1)	0
Additions	(491)	(1)
Valuation allowance, ending balance	(492)	(1)
Net carrying value and fair value
Net carrying and fair value, beginning balance	1,847	2,103
Additions	9,058	861
Amortization	(2,740)	(1,117)
Net carrying and fair value, ending balance	$ 8,165	$ 1,847

Loans Receivable - Purchased Lo

Loans Receivable - Purchased Loans with Deterioration of Credit Quality (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Receivables [Abstract]
Purchase price of loans at acquisition	$ 244,546
Allowance for credit losses at acquisition	(8,845)
Non-credit premium at acquisition	4,154
Par value of acquired loans at acquisition	$ 239,855

Loans Receivable - Outstanding

Loans Receivable - Outstanding Principal Balance and Related Carrying Value of Acquired Loans (Details) $ in Thousands	Dec. 31, 2019USD ($)
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 833,599
Carrying value	821,617
Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	7,187
Carrying value	4,975
Acquired loans evaluated collectively for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	826,412
Carrying value	$ 816,642

Loans Receivable - Changes in_2

Loans Receivable - Changes in the Accretable Discount (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Changes in accretable yield
Beginning balance	$ 755
Accretion	(551)
Net reclassification from nonaccretable yield	966
Ending balance	$ 1,170

Loans Receivable - Impaired Loa

Loans Receivable - Impaired Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		$ 105,993	$ 98,283
Average recorded investment in impaired loans		88,643	84,338
Interest income recognized on impaired loans	$ 842	3,070	3,762
Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		4,975
Outstanding principal balance		7,187
Related impairment reserve		40
Average recorded investment in impaired loans		5,332
Interest income recognized on impaired loans		551
Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		33,918	35,723
Average recorded investment in impaired loans		32,180	33,824
Interest income recognized on impaired loans		1,235	1,656
Personal Banking | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		1,464
Outstanding principal balance		2,835
Related impairment reserve		33
Average recorded investment in impaired loans		1,745
Interest income recognized on impaired loans		273
Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		21,293	22,508
Average recorded investment in impaired loans		19,767	20,733
Interest income recognized on impaired loans		688	910
Personal Banking | Residential mortgage loans | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		742
Outstanding principal balance		1,232
Related impairment reserve		7
Average recorded investment in impaired loans		866
Interest income recognized on impaired loans		147
Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		8,399	8,893
Average recorded investment in impaired loans		8,571	9,075
Interest income recognized on impaired loans		368	511
Personal Banking | Home equity loans | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		715
Outstanding principal balance		1,569
Related impairment reserve		25
Average recorded investment in impaired loans		861
Interest income recognized on impaired loans		114
Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		4,226	4,322
Average recorded investment in impaired loans		3,842	4,016
Interest income recognized on impaired loans		179	235
Personal Banking | Consumer loans | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		7
Outstanding principal balance		34
Related impairment reserve		1
Average recorded investment in impaired loans		18
Interest income recognized on impaired loans		12
Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		72,075	62,560
Average recorded investment in impaired loans		56,463	50,514
Interest income recognized on impaired loans		1,835	2,106
Commercial Banking | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		3,511
Outstanding principal balance		4,352
Related impairment reserve		7
Average recorded investment in impaired loans		3,587
Interest income recognized on impaired loans		278
Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		46,126	49,919
Average recorded investment in impaired loans		46,284	41,328
Interest income recognized on impaired loans		1,490	1,599
Commercial Banking | Commercial real estate loans | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		3,433
Outstanding principal balance		4,268
Related impairment reserve		6
Average recorded investment in impaired loans		3,509
Interest income recognized on impaired loans		273
Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		25,949	12,641
Average recorded investment in impaired loans		10,179	9,186
Interest income recognized on impaired loans		345	$ 507
Commercial Banking | Commercial loans | Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value		78
Outstanding principal balance		84
Related impairment reserve		1
Average recorded investment in impaired loans		78
Interest income recognized on impaired loans		$ 5

Accrued Interest Receivable (De

Accrued Interest Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Interest Receivable and Other Assets [Abstract]
Investment securities	$ 1,660	$ 730
Accrued Interest Receivable On FHLD Dividends	197	211
Mortgage-backed securities	2,031	1,508
Loans receivable	31,666	23,306
Accrued interest receivable	$ 35,554	$ 25,755

FHLB Stock (Details)

FHLB Stock (Details)	12 Months Ended
	Dec. 31, 2020USD ($)subclass	Dec. 31, 2019USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Number of subclasses of capital stock required to invest in for membership | subclass	2
Dividend received on capital stock | $	$ 981,400	$ 1,100,000
Federal Home Loan Bank of Pittsburgh
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Number of subclasses of capital stock required to invest in for membership | subclass	2
FHLB stock | $	$ 8,600,000	14,700,000
Federal Home Loan Bank of Pittsburgh | Subclass B-1
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	0.10%
Federal Home Loan Bank of Pittsburgh | Subclass B-1 | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	0.05%
Federal Home Loan Bank of Pittsburgh | Subclass B-1 | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	1.00%
Federal Home Loan Bank of Pittsburgh | Subclass B-2
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	4.00%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	4.00%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	0.75%
Investment in capital stock of FHLB, at cost, as a percent of outstanding advance commitments settling more than 30 days after trade	0.00%
Federal Home Loan Bank of Pittsburgh | Subclass B-2 | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	2.00%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	0.00%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	0.00%
Investment in capital stock of FHLB, at cost, as a percent of outstanding advance commitments settling more than 30 days after trade	0.00%
Federal Home Loan Bank of Pittsburgh | Subclass B-2 | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	6.00%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	6.00%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	4.00%
Investment in capital stock of FHLB, at cost, as a percent of outstanding advance commitments settling more than 30 days after trade	6.00%
Federal Home Loan Bank of Indianapolis
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Number of subclasses of capital stock required to invest in for membership | subclass	2
FHLB stock | $	$ 13,100,000	$ 0
Federal Home Loan Bank of Indianapolis | Subclass B-1
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	0.10%
Federal Home Loan Bank of Indianapolis | Subclass B-1 | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	0.01%
Federal Home Loan Bank of Indianapolis | Subclass B-1 | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of member asset value, as defined by FHLB	0.50%
Federal Home Loan Bank of Indianapolis | Subclass B-2
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	4.50%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	4.50%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	0.10%
Investment in capital stock of FHLB stock, at cost, as a percent of derivative contracts	4.50%
Investment in capital stock of FHLB stock, at cost, as a percent of mortgage purchase program	0.00%
Investment in capital stock of FHLB stock, at cost, as a percent of optional MPP	4.50%
Investment in capital stock of FHLB stock, at cost, as a percent of community investment program CIP advances	4.50%
Federal Home Loan Bank of Indianapolis | Subclass B-2 | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	1.00%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	1.00%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	0.10%
Investment in capital stock of FHLB stock, at cost, as a percent of derivative contracts	1.00%
Investment in capital stock of FHLB stock, at cost, as a percent of mortgage purchase program	0.00%
Investment in capital stock of FHLB stock, at cost, as a percent of optional MPP	0.00%
Investment in capital stock of FHLB stock, at cost, as a percent of community investment program CIP advances	1.00%
Federal Home Loan Bank of Indianapolis | Subclass B-2 | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Investment in capital stock of FHLB, at cost, as a percent of borrowings outstanding	6.00%
Investment in capital stock of FHLB, at cost, as a percent of acquired member assets	6.00%
Investment in capital stock of FHLB, at cost, as a percent of certain letters of credit	6.00%
Investment in capital stock of FHLB stock, at cost, as a percent of derivative contracts	6.00%
Investment in capital stock of FHLB stock, at cost, as a percent of mortgage purchase program	6.00%
Investment in capital stock of FHLB stock, at cost, as a percent of optional MPP	6.00%
Investment in capital stock of FHLB stock, at cost, as a percent of community investment program CIP advances	6.00%

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Premises and Equipment
Total, at cost	$ 334,983	$ 321,715
Less accumulated depreciation and amortization	(173,445)	(174,306)
Premises and equipment, net	161,538	147,409
Depreciation and amortization expense	11,900	11,700	$ 12,100
Land and land improvements
Premises and Equipment
Total, at cost	26,878	22,194
Office buildings and improvements
Premises and Equipment
Total, at cost	154,439	154,535
Furniture, fixtures and equipment
Premises and Equipment
Total, at cost	134,821	124,216
Leasehold improvements
Premises and Equipment
Total, at cost	$ 18,845	$ 20,770

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortizable intangible assets:
Intangible asset - net	$ 19,936	$ 23,076
Amortization expense	6,856	6,543	$ 5,848
Estimated amortization expense
For the year ending December 31, 2021	5,902
For the year ending December 31, 2022	4,680
For the year ending December 31, 2023	3,592
For the year ending December 31, 2024	2,692
For the year ending December 31, 2025	1,819
Core Deposits
Amortizable intangible assets:
Intangible asset - gross	71,182	71,183
Less: accumulated amortization	(56,896)	(50,934)
Intangible asset - net	18,003	20,249
Core Deposits | Mutual First Financial Inc.
Amortizable intangible assets:
Intangible asset - gross	3,717	0
Customer and Contract
Amortizable intangible assets:
Intangible asset - gross	12,775	12,775
Less: accumulated amortization	(10,842)	(9,948)
Intangible asset - net	$ 1,933	$ 2,827

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 346,103,000	$ 307,420,000
Goodwill acquired	36,176,000	38,683,000
Balance at the end of the period	382,279,000	346,103,000
Goodwill impairment	$ 0	$ 0

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deposits [Abstract]
Noninterest-bearing demand deposits	$ 2,716,224	$ 1,609,653
Interest-bearing demand deposits	2,755,950	1,944,108
Money market deposit accounts	2,437,539	1,863,998
Savings deposits	2,047,424	1,604,838
Time deposits	1,642,096	1,569,410
Total deposits	11,599,233	8,592,007
Aggregate amount of certificates of deposit with a minimum denomination of $100,000	578,500	521,100
Deposits in accounts exceeding $250,000	3,744,000
Contractual maturity of the certificate accounts
Due within 12 months	990,769	909,509
Due between 12 and 24 months	380,466	300,656
Due between 24 and 36 months	164,583	214,301
Due between 36 and 48 months	64,700	106,065
Due between 48 and 60 months	36,098	35,358
After 60 months	5,480	3,521
Total time deposits	1,642,096	1,569,410
Interest expense incurred on deposits
Interest-bearing demand deposits	3,358	6,012	$ 3,607
Money market deposit accounts	7,021	13,010	5,740
Savings deposits	2,614	3,115	3,064
Time deposits	22,903	27,079	18,574
Total interest expense on deposits	$ 35,896	$ 49,216	$ 30,985

Borrowed Funds - Schedule of Bo

Borrowed Funds - Schedule of Borrowed Funds (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Borrowed funds	$ 283,044	$ 246,336
Term notes payable to the FHLB:
Debt Instrument [Line Items]
Borrowed funds	22,054	153,600
Collateralized borrowings, due within one year
Debt Instrument [Line Items]
Borrowed funds	$ 137,661	$ 92,736
Effective interest rate (as a percent)	0.19%	0.25%
Subordinated Debt
Debt Instrument [Line Items]
Borrowed funds	$ 123,329	$ 0
Effective interest rate (as a percent)	4.00%	0.00%
Federal Home Loan Bank of Indianapolis | Term notes payable to the FHLB:
Debt Instrument [Line Items]
Borrowed funds	$ 22,054	$ 0
Effective interest rate (as a percent)	1.92%	0.00%
Federal Home Loan Bank of Pittsburgh | Term notes payable to the FHLB:
Debt Instrument [Line Items]
Borrowed funds	$ 0	$ 153,600
Effective interest rate (as a percent)	0.00%	2.38%

Borrowed Funds - Narrative (Det

Borrowed Funds - Narrative (Details)	Sep. 09, 2020USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Apr. 24, 2020business_trust
Debt Instrument [Line Items]
Number of statutory business trusts owned | business_trust					5
Number Of Business Trusts Acquired After Merger | business_trust					2
Subordinated Debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Spread on variable rate basis (as a percent)	3.89%
Debt Issuance Costs, Net	$ 1,800,000
Debt Issuance Costs Amortization Period	5 years
FHLB of Pittsburgh
Debt Instrument [Line Items]
Maximum commitment		$ 250,000,000
Collateralized borrowings, due within one year
Debt Instrument [Line Items]
Due within one year, amount		137,700,000	$ 92,700,000
Average amount of agreements outstanding		122,800,000	91,100,000	$ 102,300,000
Maximum amount of outstanding security repurchase agreement		$ 150,600,000	$ 101,100,000	$ 110,300,000
Trust preferred investments
Debt Instrument [Line Items]
Maximum period for which interest payment on the subordinated debentures can be deferred		5 years
Interest deferral		$ 0

Borrowed Funds - Schedule of Ca

Borrowed Funds - Schedule of Capital Debt Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Junior subordinated debentures	$ 128,794	$ 121,800
Trust preferred investments
Debt Instrument [Line Items]
Capital debt securities	128,875
Junior subordinated debentures	$ 128,794	121,800
Trust preferred investments | Northwest Bancorp Capital Trust III
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	138.00%
Capital debt securities	$ 50,000
Junior subordinated debentures	$ 51,547	51,547
Trust preferred investments | Northwest Bancorp Statutory Trust IV
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	138.00%
Capital debt securities	$ 50,000
Junior subordinated debentures	$ 51,547	51,547
Trust preferred investments | LNB Trust II
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	148.00%
Capital debt securities	$ 7,875
Junior subordinated debentures	$ 8,119	8,119
Trust preferred investments | Union National Capital Trust I
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	285.00%
Capital debt securities	$ 8,000
Junior subordinated debentures	$ 7,925	7,900
Trust preferred investments | Union National Capital Trust II
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	200.00%
Capital debt securities	$ 3,000
Junior subordinated debentures	$ 2,714	2,687
Trust preferred investments | M F B C Statutory Trust I
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	170.00%
Capital debt securities	$ 5,000
Junior subordinated debentures	$ 3,476	0
Trust preferred investments | Universal Preferred Trust
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	169.00%
Capital debt securities	$ 5,000
Junior subordinated debentures	$ 3,466	$ 0

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allocation of total income tax
Income tax expense	$ 9,327	$ 8,467	$ (1,139)	$ 1,017	$ 6,773	$ 9,793	$ 7,404	$ 6,709	$ 7,547	$ 7,035	$ 6,900	$ 6,940	$ 17,672	$ 30,679	$ 28,422
Shareholders’ equity for unrealized gain/(loss) on securities available-for-sale													5,061	3,992	(573)
Shareholders’ equity for pension adjustment													(3,774)	(2,859)	(24)
Shareholders’ equity for swap fair value adjustment													0	0	223
Unallocated income tax													18,959	31,812	28,048
Income tax expense applicable to income before taxes
Current													25,756	27,903	31,192
Deferred													(8,084)	2,776	(2,770)
Total provision for income taxes	9,327	$ 8,467	$ (1,139)	$ 1,017	6,773	$ 9,793	$ 7,404	$ 6,709	$ 7,547	$ 7,035	$ 6,900	$ 6,940	$ 17,672	$ 30,679	$ 28,422
Reconciliation of the expected federal statutory income tax rate to the effective rate
Expected tax rate													21.00%	21.00%	21.00%
Tax-exempt interest income													(1.70%)	(0.80%)	(0.90%)
State income tax, net of federal benefit													2.20%	3.70%	3.80%
Bank-owned life insurance													(1.10%)	(0.60%)	(0.90%)
Stock-based compensation													0.20%	(0.60%)	(0.80%)
Dividends on stock plans													(0.90%)	(0.60%)	(0.60%)
Low income housing and historic tax credits													(0.90%)	(0.50%)	(0.60%)
Other													0.30%	0.10%	0.20%
Effective tax rate													19.10%	21.70%	21.20%
Deferred tax assets:
Deferred compensation expense	4,272				1,974								$ 4,272	$ 1,974
Bad debts	30,418				12,609								30,418	12,609
Other reserves	2,358				961								2,358	961
Accrued post-retirement benefit cost	778				436								778	436
Stock benefit plans	820				994								820	994
Pension and post-retirement benefits	19,405				15,916								19,405	15,916
Deferred income	540				728								540	728
Lease liability	11,713				11,493								11,713	11,493
Purchase accounting	412				0								412	0
Net operating loss	2,800				504								2,800	504
Other	1,338				626								1,338	626
Total deferred tax assets	74,854				46,241								74,854	46,241
Deferred tax liabilities:
Pension expense	6,198				5,864								6,198	5,864
Purchase accounting	0				291								0	291
Intangible assets	15,419				14,464								15,419	14,464
Mortgage servicing rights	1,831				407								1,831	407
Fixed assets	4,740				5,755								4,740	5,755
Net deferred loan costs	1,548				5,042								1,548	5,042
Right of use asset	10,844				10,895								10,844	10,895
Unrealized gain on fair value of securities available-for-sale	6,332				1,259								6,332	1,259
Interest Rate Derivatives	1,268				0								1,268	0
Other	2,670				314								2,670	314
Total deferred tax liabilities	50,850				44,291								50,850	44,291
Net deferred tax asset	$ 24,004				$ 1,950								$ 24,004	$ 1,950

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details)	Dec. 31, 2020USD ($)
Operating loss carryforwards
Unrecorded deferred income tax liability	$ 3,100,000
Domestic Tax Authority
Operating loss carryforwards
Operating loss carryforwards	5,900,000
Valuation allowance for deferred tax assets	0
State and Local Jurisdiction
Operating loss carryforwards
Operating loss carryforwards	39,700,000
Valuation allowance for deferred tax assets	$ 333,000

Income Taxes - Summary of Unrec

Income Taxes - Summary of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Unrecognized tax benefits:
Balance, beginning of year	$ 331
Increases related to prior year tax positions	336
Decreases related to prior year tax positions	(5)
Increases related to current year tax positions	0
Settlements	0
Lapse of statute	0
Balance, end of year	$ 331	$ 0

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Bad debt deductions for which no deferred income taxes have been provided	$ 39.1	$ 39.1

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - Employee And Directors Stock Options - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive securities excluded from the calculation of earnings per share
Antidilutive securities excluded from computation of earnings	4,677,841
Average share price during the reporting period (in dollars per share)	$ 11.54	$ 17.07	$ 17.20

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 35,065	$ 38,050	$ (6,200)	$ 7,939	$ 25,591	$ 33,414	$ 26,383	$ 25,044	$ 26,467	$ 27,740	$ 26,299	$ 24,985	$ 74,854	$ 110,432	$ 105,491
Weighted average common shares outstanding (in shares)													120,244,474	104,878,774	102,073,888
Dilutive potential shares due to effect of stock options (in shares)													0	960,375	1,492,013
Total weighted average common shares and dilutive potential shares (in shares)													120,244,474	105,839,149	103,565,901
Basic earnings per share (in dollars per share)	$ 0.28	$ 0.30	$ (0.05)	$ 0.08	$ 0.24	$ 0.32	$ 0.25	$ 0.24	$ 0.26	$ 0.27	$ 0.26	$ 0.25	$ 0.62	$ 1.05	$ 1.03
Diluted earnings per share (in dollars per share)	$ 0.28	$ 0.30	$ (0.05)	$ 0.07	$ 0.24	$ 0.31	$ 0.25	$ 0.24	$ 0.26	$ 0.27	$ 0.25	$ 0.24	$ 0.62	$ 1.04	$ 1.02

Employee Benefit Plans - Pensio

Employee Benefit Plans - Pension Plans, Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Aug. 01, 2020hour
Employee benefit plans
Employer matching contribution	100.00%
Employee matching contribution	4.00%
Soft freeze, hours threshold | hour				1,000
Total expense for all retirement plans	$ 8.2	$ 6.7	$ 5.8
Estimated net loss that will be amortized from accumulated other comprehensive income into net periodic cost over the next year	4	(2.3)
Pension Plans
Employee benefit plans
Accumulated benefit obligation for funded defined benefit pension plan	254.2	217.3	175.1
Accumulated benefit obligation for unfunded defined benefit pension plan	$ 4.4	$ 5.2	$ 4.8
Target allocation of any one stock, maximum (as a percent)	10.00%
Maximum average maturity of bond portfolio	10 years
2021	$ 8.3
2022	8
2023	8.1
2024	8.5
2025	8.8
2026 to 2030	48.3
Pension Plans | Minimum
Employee benefit plans
Contributions to defined benefit pension plan	2
Pension Plans | Maximum
Employee benefit plans
Contributions to defined benefit pension plan	$ 4
Pension Plans | Common stock | Minimum
Employee benefit plans
Target allocation, (as a percent)	30.00%	30.00%
Pension Plans | Common stock | Maximum
Employee benefit plans
Target allocation, (as a percent)	60.00%	60.00%
Pension Plans | Mutual funds | Minimum
Employee benefit plans
Target allocation, (as a percent)	20.00%	20.00%
Pension Plans | Mutual funds | Maximum
Employee benefit plans
Target allocation, (as a percent)	50.00%	50.00%

Employee Benefit Plans - Pens_2

Employee Benefit Plans - Pension Plans - Components of Net Periodic Pension Cost and Other Amounts Recognized In OCI (Details) - Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of net periodic pension cost
Service cost	$ 8,391	$ 5,949	$ 6,864
Interest cost	6,855	7,353	6,712
Expected return on plan assets	(12,362)	(11,037)	(11,968)
Amortization of prior service cost	(2,322)	(2,322)	(2,322)
Amortization of the net loss	3,695	3,423	3,489
Net periodic pension cost	4,257	3,366	2,775
Changes in the defined benefit pension plans’ plan assets and benefit obligations recognized in other comprehensive income
Net (gain)/loss	11,521	8,235	(1,716)
Amortization of prior service cost	2,323	2,323	2,323
Total recognized in other comprehensive income	13,844	10,558	607
Total recognized in net periodic pension cost and other comprehensive income	$ 18,101	$ 13,924	$ 3,382

Employee Benefit Plans - Define

Employee Benefit Plans - Defined Benefit Pension Plans' Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in plan assets:
Fair value of plan assets at beginning of year	$ 193,361
Fair value of plan assets at end of period	216,712	$ 193,361
Pension Plans
Change in benefit obligation:
Benefit obligation at beginning of year	222,497	181,121
Service cost	8,391	5,949	$ 6,864
Interest cost	6,855	7,353	6,712
Actuarial loss	29,084	35,203
Benefits paid	(8,238)	(7,129)
Benefit obligation at end of year	258,589	222,497	181,121
Change in plan assets:
Fair value of plan assets at beginning of year	193,541	160,766
Actual return on plan assets	26,228	34,582
Employer contributions	5,341	5,322
Benefits paid	(8,238)	(7,129)
Fair value of plan assets at end of period	216,872	193,541	$ 160,766
Funded status at end of year	$ (41,717)	$ (28,956)
Assumptions used to develop the net periodic pension cost
Discount rate	3.14%	4.15%	3.53%
Expected long-term rate of return on assets	6.50%	7.00%	7.00%
Rate of increase in compensation levels	3.00%	3.00%	3.00%
Assumptions used to determine benefit obligations
Discount rate	2.39%	3.14%	4.15%
Expected long-term rate of return on assets	6.50%	6.50%	7.00%
Rate of increase in compensation levels	3.00%	3.00%	3.00%

Employee Benefit Plans - Defi_2

Employee Benefit Plans - Defined Benefit Plans Certain Information and Weighted Average Asset Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee benefit plans
Fair value of plan assets	$ 216,712	$ 193,361
Mutual funds
Employee benefit plans
Fair value of plan assets	140,746	127,186
Common stock
Employee benefit plans
Fair value of plan assets	52,019	45,198
Pension Plans
Employee benefit plans
Projected benefit obligation	258,589	222,497	$ 181,121
Accumulated benefit obligation	258,589	222,497
Fair value of plan assets	$ 216,872	$ 193,541	$ 160,766
Weighted average asset allocation of defined benefit plans
Total (as a percent)	100.00%	100.00%
Pension Plans | Mutual funds
Weighted average asset allocation of defined benefit plans
Total (as a percent)	22.00%	24.00%
Pension Plans | Common stock
Weighted average asset allocation of defined benefit plans
Total (as a percent)	67.00%	70.00%
Pension Plans | Other
Weighted average asset allocation of defined benefit plans
Total (as a percent)	11.00%	6.00%
Minimum | Pension Plans | Mutual funds
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	20.00%	20.00%
Minimum | Pension Plans | Common stock
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	30.00%	30.00%
Minimum | Pension Plans | Other
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	5.00%	5.00%
Maximum | Pension Plans | Mutual funds
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	50.00%	50.00%
Maximum | Pension Plans | Common stock
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	60.00%	60.00%
Maximum | Pension Plans | Other
Weighted average asset allocation of defined benefit plans
Target allocation, (as a percent)	50.00%	50.00%

Employee Benefit Plans - Pens_3

Employee Benefit Plans - Pension Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Employee benefit plans
Fair value of plan assets	$ 216,712	$ 193,361
Fair value of plan assets, including accrued interest and dividends	216,900	193,500
Common stock
Employee benefit plans
Fair value of plan assets	52,019	45,198
Mutual funds
Employee benefit plans
Fair value of plan assets	140,746	127,186
Money market funds
Employee benefit plans
Fair value of plan assets	15,068	12,024
Other
Employee benefit plans
Fair value of plan assets	8,879	8,953
Level 1
Employee benefit plans
Fair value of plan assets	216,712	193,361
Level 1 | Common stock
Employee benefit plans
Fair value of plan assets	52,019	45,198
Level 1 | Mutual funds
Employee benefit plans
Fair value of plan assets	140,746	127,186
Level 1 | Money market funds
Employee benefit plans
Fair value of plan assets	15,068	12,024
Level 1 | Other
Employee benefit plans
Fair value of plan assets	$ 8,879	$ 8,953

Employee Benefit Plans - Post-r

Employee Benefit Plans - Post-retirement Healthcare Plan, Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated net loss that will be amortized from accumulated other comprehensive income into net periodic cost over the next year	$ (4)	$ 2.3
Postretirement Healthcare Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Requisite service age, minimum	55 years
Estimated net loss that will be amortized from accumulated other comprehensive income into net periodic cost over the next year	$ (14)
Effect of one percentage point increase on healthcare cost (as a percent)	5.00%
Effect of 1-percent increase in assumed health care cost trend rates on interest cost in current period	$ 3
Effect of 1-percent increase in assumed health care cost trend rates on postretirement benefit obligation	$ 20

Employee Benefit Plans - Post_2

Employee Benefit Plans - Post-retirement Healthcare Plan - Components of Net Periodic Benefit Cost and Other Amounts Recognized in OCI (Details) - Postretirement Healthcare Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 26	$ 52	$ 54
Amortization of prior service cost	18	68	98
Net periodic pension cost	44	120	152
Net (gain)/loss	(51)	(475)	(305)
Total recognized in other comprehensive income	(51)	(475)	(305)
Total recognized in net periodic pension cost and other comprehensive income	$ (7)	$ (355)	$ (153)

Employee Benefit Plans - Post_3

Employee Benefit Plans - Post-retirement Healthcare Plan - Funded Status (Details) - Postretirement Healthcare Plan - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Change in benefit obligation:
Benefit obligation at beginning of year	$ 889,000	$ 1,332,000
Interest cost	26,000	52,000	$ 54,000
Actuarial loss	(34,000)	(405,000)
Benefits paid	(111,000)	(90,000)
Benefit obligation at end of year	770,000	889,000	$ 1,332,000
Change in plan assets:
Employer contributions	111,000	90,000
Benefits paid	(111,000)	(90,000)
Funded status at end of year	$ (770,000)	$ (889,000)
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate	3.14%	4.15%	3.53%
Monthly cost of healthcare insurance per beneficiary	$ 370	$ 391	$ 507
Annual rate of increase in healthcare costs	4.00%	4.00%	4.00%
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligation	$ 770,000	$ 1,332,000	$ 1,332,000	$ 770,000	$ 889,000
Accumulated benefit obligation				$ 770,000	$ 889,000

Employee Benefit Plans - Common

Employee Benefit Plans - Common Stock Awards, Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	May 20, 2020	May 22, 2019	May 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Apr. 18, 2018
Stock Related Compensation
Weighted average grant date fair value of shares issued (in dollars per share)	$ 9.71
Restricted common shares
Stock Related Compensation
Weighted average grant date fair value of shares issued (in dollars per share)		$ 17.27	$ 16.59
Market value of shares issued		$ 4.9	$ 6.9
Vesting period				7 years	7 years
2018 Equity Incentive Plan | Restricted common shares
Stock Related Compensation
Number of shares authorized							1,500,000
Number of shares forfeited				74,007		116,617
Vesting period				7 years
Employees
Stock Related Compensation
Number of shares awarded	261,091
Employees | Restricted common shares
Stock Related Compensation
Number of shares awarded		256,800	390,030	261,091	256,800
Director
Stock Related Compensation
Number of shares awarded	21,600
Director | Restricted common shares
Stock Related Compensation
Number of shares awarded		24,300	24,300	21,600

Employee Benefit Plans - Stock

Employee Benefit Plans - Stock Option Plans, Narrative (Details) - Stock options - USD ($) $ / shares in Units, $ in Millions	May 20, 2020	May 22, 2019	May 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Outstanding and exercisable options
Granted (in shares)				614,076	612,210	895,960
Granted (in dollars per share)	$ 9.71	$ 17.27	$ 16.59	$ 9.71	$ 17.27	$ 16.59
Vesting period				7 years	7 years
Weighted average fair value of options at grant date (in dollars per share)				$ 0.13	$ 1.14	$ 1.49
Intrinsic value of options exercised				$ 444	$ 5.2	$ 4.8
Exercise period				10 years
2018 Equity Incentive Plan
Outstanding and exercisable options
Number of shares authorized				3,500,000
Employees
Outstanding and exercisable options
Granted (in shares)	556,476	547,410	831,160	556,476	547,410
Director
Outstanding and exercisable options
Granted (in shares)	57,600	64,800	64,800	57,600	64,800

Employee Benefit Plans - Share-

Employee Benefit Plans - Share-Based Awards (Details) - Stock options - USD ($) $ / shares in Units, $ in Millions	May 20, 2020	May 22, 2019	May 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number
Balance at beginning of year (in shares)				5,101,351	5,612,812	5,695,570
Granted (in shares)				614,076	612,210	895,960
Exercised (in shares)				(131,309)	(917,845)	(830,712)
Forfeited/ expired (in shares)				(340,946)	(205,826)	(148,006)
Balance at end of year (in shares)				5,243,172	5,101,351	5,612,812
Exercisable at end of year (in shares)				3,350,356	2,803,918	3,016,175
Weighted average exercise price
Balance at beginning of year (in dollars per share)				$ 14.28	$ 13.49	$ 12.75
Granted (in dollars per share)	$ 9.71	$ 17.27	$ 16.59	9.71	17.27	16.59
Exercised (in dollars per share)				11.81	11.77	10.38
Forfeited (in dollars per share)				14.39	14.28	12.52
Balance at end of year (in dollars per share)				13.72	14.28	13.49
Exercisable at end of year (in dollars per share)				13.53	13.36	12.61
Weighted average fair value of options at grant date (in dollars per share)				$ 0.13	$ 1.14	$ 1.49
Intrinsic value of options exercised				$ 444	$ 5.2	$ 4.8

Employee Benefit Plans - Number

Employee Benefit Plans - Number of Options Outstanding and Exercisable and Weighted Average Remaining Life of All Option Grants (Details)	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Exercise price $9.71
Options outstanding:
Number of options (in shares)	565,331
Weighted average remaining contract life (years)	6 years 6 months
Options exercisable:
Number of options (in shares)	96,865
Weighted average remaining term - vested (years)	6 years 6 months
Exercise price $11.70
Options outstanding:
Number of options (in shares)	270,966
Weighted average remaining contract life (years)	1 year 6 months
Options exercisable:
Number of options (in shares)	252,096
Weighted average remaining term - vested (years)	1 year 6 months
Exercise price $12.12
Options outstanding:
Number of options (in shares)	90,248
Weighted average remaining contract life (years)	1 month 6 days
Options exercisable:
Number of options (in shares)	90,000
Weighted average remaining term - vested (years)	1 month 6 days
Exercise price $12.17
Options outstanding:
Number of options (in shares)	2,700
Weighted average remaining contract life (years)	3 months
Options exercisable:
Number of options (in shares)	2,700
Weighted average remaining term - vested (years)	3 months
Exercise price $12.32
Options outstanding:
Number of options (in shares)	902,228
Weighted average remaining contract life (years)	6 months
Options exercisable:
Number of options (in shares)	902,228
Weighted average remaining term - vested (years)	6 months
Exercise price $12.37
Options outstanding:
Number of options (in shares)	389,528
Weighted average remaining contract life (years)	4 years 6 months
Options exercisable:
Number of options (in shares)	269,944
Weighted average remaining term - vested (years)	4 years 6 months
Exercise price $12.44
Options outstanding:
Number of options (in shares)	311,934
Weighted average remaining contract life (years)	2 years 6 months
Options exercisable:
Number of options (in shares)	267,230
Weighted average remaining term - vested (years)	2 years 6 months
Exercise price $13.15
Options outstanding:
Number of options (in shares)	331,724
Weighted average remaining contract life (years)	3 years 6 months
Options exercisable:
Number of options (in shares)	256,922
Weighted average remaining term - vested (years)	3 years 6 months
Exercise price $14.15
Options outstanding:
Number of options (in shares)	497,188
Weighted average remaining contract life (years)	5 years 6 months
Options exercisable:
Number of options (in shares)	304,568
Weighted average remaining term - vested (years)	5 years 6 months
Exercise price $15.57
Options outstanding:
Number of options (in shares)	603,792
Weighted average remaining contract life (years)	6 years 6 months
Options exercisable:
Number of options (in shares)	317,526
Weighted average remaining term - vested (years)	6 years 6 months
Exercise price $16.59
Options outstanding:
Number of options (in shares)	749,320
Weighted average remaining contract life (years)	4 years 6 months
Options exercisable:
Number of options (in shares)	398,156
Weighted average remaining term - vested (years)	4 years 6 months
Exercise price $17.27
Options outstanding:
Number of options (in shares)	528,213
Weighted average remaining contract life (years)	5 years 6 months
Options exercisable:
Number of options (in shares)	191,873
Weighted average remaining term - vested (years)	5 years 6 months
Total $14.28
Options outstanding:
Number of options (in shares)	5,243,172
Weighted average remaining contract life (years)	3 years 11 months 1 day
Options exercisable:
Number of options (in shares)	3,350,356
Weighted average remaining term - vested (years)	3 years 1 month 13 days
Stock options | Exercise price $9.71
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	$ 9.71
Stock options | Exercise price $11.70
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	11.70
Stock options | Exercise price $12.12
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	12.12
Stock options | Exercise price $12.17
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	12.17
Stock options | Exercise price $12.32
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	12.32
Stock options | Exercise price $12.37
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	12.37
Stock options | Exercise price $12.44
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	12.44
Stock options | Exercise price $13.15
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	13.15
Stock options | Exercise price $14.15
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	14.15
Stock options | Exercise price $15.57
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	15.57
Stock options | Exercise price $16.59
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	16.59
Stock options | Exercise price $17.27
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	17.27
Stock options | Total $14.28
Outstanding and exercisable options
Exercise price (in dollars per share) | $ / shares	$ 14.28

Disclosures About Fair Value _3

Disclosures About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Securities available-for-sale	$ 1,398,941	$ 819,901
Securities held-to-maturity	179,666	18,223
Accrued interest receivable	35,554	25,755
Derivative asset	61,433	21,593
Financial liabilities:
Junior subordinated debentures	128,794	121,800
Interest rate swaps not designated as hedging instruments	54,665	20,991
Level 1
Financial assets:
Cash and cash equivalents	736,277	60,846
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans receivable, net	0	0
Residential mortgage loans held-for-sale	0	0
Accrued interest receivable	35,554	25,755
FHLB stock	0	0
Total assets	771,831	86,601
Financial liabilities:
Savings and checking accounts	9,957,137	7,022,597
Time deposits	0	0
Borrowed funds	159,745	246,341
Junior subordinated debentures	0	0
Accrued interest payable	2,054	1,142
Total financial liabilities	10,118,936	7,270,080
Level 1 | Interest rate lock commitments
Financial assets:
Derivative asset	0	0
Level 1 | Forward commitments
Financial assets:
Derivative asset	0	0
Level 1 | Interest rate swaps
Financial assets:
Derivative asset	0	0
Financial liabilities:
Interest rate swaps not designated as hedging instruments	0	0
Level 1 | Risk participation agreements
Financial liabilities:
Interest rate swaps not designated as hedging instruments	0	0
Level 2
Financial assets:
Cash and cash equivalents	0	0
Securities available-for-sale	1,398,941	819,901
Securities held-to-maturity	179,666	18,223
Loans receivable, net	0	0
Residential mortgage loans held-for-sale	0	0
Accrued interest receivable	0	0
FHLB stock	0	0
Total assets	1,633,575	859,158
Financial liabilities:
Savings and checking accounts	0	0
Time deposits	0	0
Borrowed funds	123,329	0
Junior subordinated debentures	0	0
Accrued interest payable	0	0
Total financial liabilities	177,994	20,991
Level 2 | Interest rate lock commitments
Financial assets:
Derivative asset	0	0
Level 2 | Forward commitments
Financial assets:
Derivative asset	1,105	145
Level 2 | Interest rate swaps
Financial assets:
Derivative asset	53,863	20,889
Financial liabilities:
Interest rate swaps not designated as hedging instruments	54,579	20,952
Level 2 | Risk participation agreements
Financial liabilities:
Interest rate swaps not designated as hedging instruments	86	39
Level 3
Financial assets:
Cash and cash equivalents	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans receivable, net	10,334,521	8,666,149
Residential mortgage loans held-for-sale	58,786	7,709
Accrued interest receivable	0	0
FHLB stock	0	0
Total assets	10,399,772	8,674,417
Financial liabilities:
Savings and checking accounts	0	0
Time deposits	1,669,546	1,574,063
Borrowed funds	0	0
Junior subordinated debentures	121,106	115,518
Accrued interest payable	0	0
Total financial liabilities	1,790,652	1,689,581
Level 3 | Interest rate lock commitments
Financial assets:
Derivative asset	6,465	559
Level 3 | Forward commitments
Financial assets:
Derivative asset	0	0
Level 3 | Interest rate swaps
Financial assets:
Derivative asset	0	0
Financial liabilities:
Interest rate swaps not designated as hedging instruments	0	0
Level 3 | Risk participation agreements
Financial liabilities:
Interest rate swaps not designated as hedging instruments	0	0
Carrying amount
Financial assets:
Cash and cash equivalents	736,277	60,846
Securities available-for-sale	1,398,941	819,901
Securities held-to-maturity	178,887	18,036
Loans receivable, net	10,387,636	8,743,024
Residential mortgage loans held-for-sale	58,786	7,709
Accrued interest receivable	35,554	25,755
FHLB stock	21,748	14,740
Total assets	12,879,262	9,711,604
Financial liabilities:
Savings and checking accounts	9,957,137	7,022,597
Time deposits	1,642,096	1,569,410
Borrowed funds	283,044	246,336
Junior subordinated debentures	128,794	121,800
Accrued interest payable	2,054	1,142
Total financial liabilities	12,067,790	8,982,276
Carrying amount | Interest rate lock commitments
Financial assets:
Derivative asset	6,465	559
Carrying amount | Forward commitments
Financial assets:
Derivative asset	1,105	145
Carrying amount | Interest rate swaps
Financial assets:
Derivative asset	53,863	20,889
Financial liabilities:
Interest rate swaps not designated as hedging instruments	54,579	20,952
Carrying amount | Risk participation agreements
Financial liabilities:
Interest rate swaps not designated as hedging instruments	86	39
Estimated fair value
Financial assets:
Cash and cash equivalents	736,277	60,846
Securities available-for-sale	1,398,941	819,901
Securities held-to-maturity	179,666	18,223
Loans receivable, net	10,334,521	8,666,149
Residential mortgage loans held-for-sale	58,786	7,709
Accrued interest receivable	35,554	25,755
FHLB stock	21,748	14,740
Total assets	12,826,926	9,634,916
Financial liabilities:
Savings and checking accounts	9,957,137	7,022,597
Time deposits	1,669,546	1,574,063
Borrowed funds	283,074	246,341
Junior subordinated debentures	121,106	115,518
Accrued interest payable	2,054	1,142
Total financial liabilities	12,087,582	8,980,652
Estimated fair value | Interest rate lock commitments
Financial assets:
Derivative asset	6,465	559
Estimated fair value | Forward commitments
Financial assets:
Derivative asset	1,105	145
Estimated fair value | Interest rate swaps
Financial assets:
Derivative asset	53,863	20,889
Financial liabilities:
Interest rate swaps not designated as hedging instruments	54,579	20,952
Estimated fair value | Risk participation agreements
Financial liabilities:
Interest rate swaps not designated as hedging instruments	$ 86	$ 39

Disclosures About Fair Value _4

Disclosures About Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	$ 1,398,941	$ 819,901
Derivative asset	61,433	21,593
Cash flow hedges - interest rate swaps	54,665	20,991
Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total assets	771,831	86,601
Level 1 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Level 1 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Level 1 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Cash flow hedges - interest rate swaps	0	0
Level 1 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	0	0
Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	1,398,941	819,901
Total assets	1,633,575	859,158
Level 2 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Level 2 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	1,105	145
Level 2 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	53,863	20,889
Cash flow hedges - interest rate swaps	54,579	20,952
Level 2 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	86	39
Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total assets	10,399,772	8,674,417
Level 3 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	6,465	559
Level 3 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Level 3 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Cash flow hedges - interest rate swaps	0	0
Level 3 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	0	0
Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	252,237	146,742
Mortgage-backed securities	1,146,704	673,159
Total assets	1,460,374	841,494
Total liabilities	54,665	20,991
Measured on recurring basis | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	40,917	14,991
Measured on recurring basis | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	94,507	104,784
Measured on recurring basis | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	116,813	26,048
Measured on recurring basis | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		919
Measured on recurring basis | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	23,026	23,264
Collateralized mortgage obligations	343,409	207,016
Measured on recurring basis | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	203,571	89,259
Collateralized mortgage obligations	262,109	184,682
Measured on recurring basis | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	134,572	50,139
Collateralized mortgage obligations	179,552	118,302
Measured on recurring basis | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	465	497
Measured on recurring basis | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	6,465	559
Measured on recurring basis | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	1,105	145
Measured on recurring basis | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	53,863	20,889
Cash flow hedges - interest rate swaps	54,579	20,952
Measured on recurring basis | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	86	39
Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Mortgage-backed securities	0	0
Total assets	0	0
Total liabilities	0	0
Measured on recurring basis | Level 1 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		0
Measured on recurring basis | Level 1 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 1 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 1 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 1 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Measured on recurring basis | Level 1 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Measured on recurring basis | Level 1 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Measured on recurring basis | Level 1 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Cash flow hedges - interest rate swaps	0	0
Measured on recurring basis | Level 1 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	0	0
Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	252,237	146,742
Mortgage-backed securities	1,146,704	673,159
Total assets	1,453,909	840,935
Total liabilities	54,665	20,991
Measured on recurring basis | Level 2 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	40,917	14,991
Measured on recurring basis | Level 2 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	94,507	104,784
Measured on recurring basis | Level 2 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	116,813	26,048
Measured on recurring basis | Level 2 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		919
Measured on recurring basis | Level 2 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	23,026	23,264
Collateralized mortgage obligations	343,409	207,016
Measured on recurring basis | Level 2 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	203,571	89,259
Collateralized mortgage obligations	262,109	184,682
Measured on recurring basis | Level 2 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	134,572	50,139
Collateralized mortgage obligations	179,552	118,302
Measured on recurring basis | Level 2 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	465	497
Measured on recurring basis | Level 2 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Measured on recurring basis | Level 2 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	1,105	145
Measured on recurring basis | Level 2 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	53,863	20,889
Cash flow hedges - interest rate swaps	54,579	20,952
Measured on recurring basis | Level 2 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	86	39
Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Mortgage-backed securities	0	0
Total assets	6,465	559
Total liabilities	0	0
Measured on recurring basis | Level 3 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		0
Measured on recurring basis | Level 3 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 3 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 3 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage obligations	0	0
Measured on recurring basis | Level 3 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Measured on recurring basis | Level 3 | Interest rate lock commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	6,465	559
Measured on recurring basis | Level 3 | Forward commitments
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Measured on recurring basis | Level 3 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Derivative asset	0	0
Cash flow hedges - interest rate swaps	0	0
Measured on recurring basis | Level 3 | Risk participation agreements
Assets and liabilities measured at fair value on a recurring basis
Cash flow hedges - interest rate swaps	$ 0	$ 0

Disclosures About Fair Value _5

Disclosures About Fair Value of Financial Instruments - Reconciliation of all Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - Level 3 - Debt securities - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period	$ 559	$ 0
Total gains or losses:
Included in net income	0	0
Net activity	5,906	559
Transfers from Level 3	0	0
Transfers into of Level 3	0	0
Balance at the end of the period	$ 6,465	$ 559

Disclosures About Fair Value _6

Disclosures About Fair Value of Financial Instruments - Nonrecurring Assets that had Fair Market Values Below the Carrying Amount (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	$ 771,831	$ 86,601
Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	1,633,575	859,158
Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	10,399,772	8,674,417
Loans individually assessed
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	95,303
Real estate owned, net
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	2,232
Fair Value, Measurements, Nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	97,535	47,188
Fair Value, Measurements, Nonrecurring | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	97,535	47,188
Fair Value, Measurements, Nonrecurring | Loans individually assessed
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	95,303	46,238
Fair Value, Measurements, Nonrecurring | Loans individually assessed | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Loans individually assessed | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Loans individually assessed | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	95,303	46,238
Fair Value, Measurements, Nonrecurring | Real estate owned, net
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	2,232	950
Fair Value, Measurements, Nonrecurring | Real estate owned, net | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Real estate owned, net | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	0	0
Fair Value, Measurements, Nonrecurring | Real estate owned, net | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Fair value	$ 2,232	$ 950

Disclosures About Fair Value _7

Disclosures About Fair Value of Financial Instruments - Additional Quantitative Information, Assets Measured at Fair Value, Recurring and Nonrecurring Basis, Level 3 Input (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Loans individually assessed
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value	$ 95,303
Loans individually assessed | Appraisal Value
Quantitative information for Level 3 Fair Value Measurements Assets
Estimated costs to sell	10.00%
Real estate owned, net
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value	$ 2,232
Real estate owned, net | Appraisal Value
Quantitative information for Level 3 Fair Value Measurements Assets
Estimated costs to sell	10.00%
Measurement Input, Discount Rate | Loans individually assessed | Discounted Cash Flow | Minimum
Quantitative information for Level 3 Fair Value Measurements Assets
Discount rate	0.0200
Measurement Input, Discount Rate | Loans individually assessed | Discounted Cash Flow | Maximum
Quantitative information for Level 3 Fair Value Measurements Assets
Discount rate	0.1660
Measurement Input, Discount Rate | Loans individually assessed | Discounted Cash Flow | Weighted Average
Quantitative information for Level 3 Fair Value Measurements Assets
Discount rate	0.0826

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Tier 1 capital (leverage) (to average assets)
Minimum capital requirements (as a percent)	2.50%	2.50%
Northwest Bank
Total capital (to risk weighted assets)
Actual amount	$ 1,478,310	$ 1,146,641
Actual ratio (as a percent)	0.14887	0.13858
Capital required for capital adequacy	$ 1,042,655	$ 868,768
Minimum capital requirements ratio (as a percent)	0.10500	0.10500
Well capitalized requirements amount	$ 993,004	$ 827,398
Well capitalized requirements ratio (as a percent)	0.10000	0.10000
Tier 1 capital (to risk weighted assets)
Actual amount	$ 1,354,028	$ 1,087,727
Actual ratio (as a percent)	0.13636	0.13146
Minimum capital requirements amount	$ 844,054	$ 703,288
Minimum capital requirements ratio (as a percent)	0.08500	0.08500
Well capitalized requirements amount	$ 794,403	$ 661,918
Well capitalized requirements ratio (as a percent)	0.08000	0.08000
CET 1 capital (to risk weighted assets)
Actual amount	$ 1,354,028	$ 1,087,727
Actual ratio (as a percent)	13.636%	13.146%
Minimum capital requirements amount	$ 695,103	$ 579,178
Minimum capital requirements ratio (as a percent)	7.00%	7.00%
Well capitalized requirements amount	$ 645,453	$ 537,809
Well capitalized requirements ratio (as a percent)	6.50%	6.50%
Tier 1 capital (leverage) (to average assets)
Actual ratio (as a percent)	0.09903	0.10515
Minimum capital requirements amount	$ 546,905	$ 413,772
Minimum capital requirements ratio (as a percent)	0.04000	0.04000
Well capitalized requirements amount	$ 683,631	$ 517,216
Well capitalized requirements ratio (as a percent)	0.05000	0.05000
Northwest Bancshares, Inc.
Total capital (to risk weighted assets)
Actual amount	$ 1,654,198	$ 1,300,321
Actual ratio (as a percent)	0.16642	0.15701
Capital required for capital adequacy	$ 1,043,693	$ 869,585
Minimum capital requirements ratio (as a percent)	0.10500	0.10500
Well capitalized requirements amount	$ 993,993	$ 828,176
Well capitalized requirements ratio (as a percent)	0.10000	0.10000
Tier 1 capital (to risk weighted assets)
Actual amount	$ 1,406,321	$ 1,242,380
Actual ratio (as a percent)	0.14148	0.15001
Minimum capital requirements amount	$ 844,894	$ 703,950
Minimum capital requirements ratio (as a percent)	0.08500	0.08500
Well capitalized requirements amount	$ 795,195	$ 662,541
Well capitalized requirements ratio (as a percent)	0.08000	0.08000
CET 1 capital (to risk weighted assets)
Actual amount	$ 1,281,516	$ 1,124,259
Actual ratio (as a percent)	12.893%	13.575%
Minimum capital requirements amount	$ 695,795	$ 579,723
Minimum capital requirements ratio (as a percent)	7.00%	7.00%
Well capitalized requirements amount	$ 646,096	$ 538,314
Well capitalized requirements ratio (as a percent)	6.50%	6.50%
Tier 1 capital (leverage) (to average assets)
Actual ratio (as a percent)	0.10145	0.11913
Minimum capital requirements amount	$ 554,501	$ 417,143
Minimum capital requirements ratio (as a percent)	0.04000	0.04000
Well capitalized requirements amount	$ 693,126	$ 521,428
Well capitalized requirements ratio (as a percent)	0.05000	0.05000

Components of Accumulated Oth_3

Components of Accumulated Other Comprehensive Income - Summary of Components (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated other comprehensive income (net of tax)
Shareholders’ equity	$ 1,538,703	$ 1,353,285	$ 1,257,638	$ 1,207,724
Unrealized gain on marketable securities available-for-sale
Accumulated other comprehensive income (net of tax)
Shareholders’ equity	16,843	3,147	(6,832)	(4,409)
Defined benefit pension plans
Accumulated other comprehensive income (net of tax)
Shareholders’ equity	(50,392)	(40,088)	(32,864)	(26,980)
Accumulated other comprehensive loss
Accumulated other comprehensive income (net of tax)
Shareholders’ equity	$ (33,549)	$ (36,941)	$ (39,696)	$ (32,080)

Components of Accumulated Oth_4

Components of Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	$ 1,353,285	$ 1,257,638	$ 1,207,724
Other comprehensive income/(loss) before reclassification adjustments	1,464	1,925	(1,618)
Amounts reclassified from accumulated other comprehensive income	1,928	830	748
Other comprehensive income/(loss)	3,392	2,755	(7,616)
Balance at end of the period	1,538,703	1,353,285	1,257,638
Unrealized holding gains and losses, tax	5,607	3,990	(513)
Unrealized holding losses, tax	(209)	0	0
Unrealized holding losses, tax	(4,169)	(3,193)	(770)
Realized gains, tax	(6)	(2)	(60)
Realized interest rate swaps, tax	209	0	223
Realized gains, tax	395	334	746
Cumulative Effect, Period of Adoption, Adjustment
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	(9,649)	(1,226)	0
Balance at end of the period		(9,649)	(1,226)
Unrealized gain on marketable securities available-for-sale
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	3,147	(6,832)	(4,409)
Other comprehensive income/(loss) before reclassification adjustments	13,711	9,984	(1,277)
Amounts reclassified from accumulated other comprehensive income	(15)	(5)	(155)
Other comprehensive income/(loss)	13,696	9,979	(2,423)
Balance at end of the period	16,843	3,147	(6,832)
Unrealized gain on marketable securities available-for-sale | Cumulative Effect, Period of Adoption, Adjustment
Changes in accumulated other comprehensive income by component
Balance at beginning of the period			(991)
Change in fair value of interest rate swaps
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	0	0	(691)
Other comprehensive income/(loss) before reclassification adjustments	(946)		840
Amounts reclassified from accumulated other comprehensive income	946		0
Other comprehensive income/(loss)	0		691
Balance at end of the period	0	0	0
Change in fair value of interest rate swaps | Cumulative Effect, Period of Adoption, Adjustment
Changes in accumulated other comprehensive income by component
Balance at beginning of the period			(149)
Defined benefit pension plans
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	(40,088)	(32,864)	(26,980)
Other comprehensive income/(loss) before reclassification adjustments	(11,301)	(8,059)	(1,181)
Amounts reclassified from accumulated other comprehensive income	997	835	903
Other comprehensive income/(loss)	(10,304)	(7,224)	(5,884)
Balance at end of the period	(50,392)	(40,088)	(32,864)
Defined benefit pension plans | Cumulative Effect, Period of Adoption, Adjustment
Changes in accumulated other comprehensive income by component
Balance at beginning of the period			(5,606)
Accumulated other comprehensive loss
Changes in accumulated other comprehensive income by component
Balance at beginning of the period	(36,941)	(39,696)	(32,080)
Balance at end of the period	$ (33,549)	$ (36,941)	(39,696)
Accumulated other comprehensive loss | Cumulative Effect, Period of Adoption, Adjustment
Changes in accumulated other comprehensive income by component
Balance at beginning of the period			$ (6,746)

Parent Company Only Financial_3

Parent Company Only Financial Statements - Condensed - Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 736,277	$ 60,846
Other assets	168,503	97,268
Total assets	13,806,268	10,493,908
Liabilities:
Debentures payable	128,794	121,800
Other liabilities	209,210	134,782
Total liabilities	12,267,565	9,140,623
Shareholders’ equity	1,538,703	1,353,285	$ 1,257,638	$ 1,207,724
Total liabilities and shareholders’ equity	13,806,268	10,493,908
Parent Company
Assets
Cash and cash equivalents	172,142	150,926
Investment in bank subsidiary	1,585,429	1,314,724
Other assets	9,352	9,817
Total assets	1,766,923	1,475,467
Liabilities:
Debentures payable	252,123	121,801
Other liabilities	1,889	381
Total liabilities	254,012	122,182
Shareholders’ equity	1,512,911	1,353,285
Total liabilities and shareholders’ equity	$ 1,766,923	$ 1,475,467

Parent Company Only Financial_4

Parent Company Only Financial Statements - Condensed - Statements of Income (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended												12 Months Ended
	Jan. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income:
Interest income		$ 111,729	$ 113,414	$ 108,547	$ 100,378	$ 103,418	$ 106,866	$ 106,807	$ 100,289	$ 97,768	$ 95,605	$ 92,875	$ 89,533	$ 434,068	$ 417,380	$ 375,781
Expense:
Other expenses														16,494	13,995	11,333
Interest expense		8,841	9,880	10,469	13,150	14,473	15,930	14,204	12,307	10,937	9,788	8,649	7,766	42,340	56,914	37,140
Income before income taxes		44,392	46,517	(7,339)	8,956	32,364	43,207	33,787	31,753	34,014	34,775	33,199	31,925	92,526	141,111	133,913
Income tax benefit		9,327	8,467	(1,139)	1,017	6,773	9,793	7,404	6,709	7,547	7,035	6,900	6,940	17,672	30,679	28,422
Net income		$ 35,065	$ 38,050	$ (6,200)	$ 7,939	$ 25,591	$ 33,414	$ 26,383	$ 25,044	$ 26,467	$ 27,740	$ 26,299	$ 24,985	74,854	110,432	105,491
Parent Company
Income:
Interest income														196	209	198
Other income														553	628	752
Dividends from bank subsidiary*														0	110,000	105,000
Undistributed earnings from equity investment in bank subsidiary														80,996	5,102	5,149
Total income														81,745	115,939	111,099
Expense:
Compensation and employee benefits														1,234	1,124	1,225
Other expenses														2,241	791	660
Interest expense														4,933	4,833	4,961
Total expense														8,408	6,748	6,846
Income before income taxes														73,337	109,191	104,253
Income tax benefit														(1,517)	(1,241)	(1,238)
Net income														$ 74,854	$ 110,432	$ 105,491
Parent Company | Subsequent Event
Income:
Dividends from bank subsidiary*	$ 73,000

Parent Company Only Financial_5

Parent Company Only Financial Statements - Condensed - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income	$ 35,065	$ 38,050	$ (6,200)	$ 7,939	$ 25,591	$ 33,414	$ 26,383	$ 25,044	$ 26,467	$ 27,740	$ 26,299	$ 24,985	$ 74,854	$ 110,432	$ 105,491
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of marketable securities													(236)	(50)	(157)
Net cash provided by operating activities													140,435	127,462	138,909
Investing activities:
Net purchase sale of marketable securities													1,096	32,389	5,206
Net cash provided used in investing activities													(560,575)	(300,593)	(281,913)
Financing activities:
Cash dividends paid on common stock													(93,132)	(76,173)	(69,921)
Proceeds from stock options exercised													1,479	9,727	8,190
Net cash provided by financing activities													1,095,571	165,188	134,083
Net increase/(decrease) in cash and cash equivalents													675,431	(7,943)	(8,921)
Cash and cash equivalents at beginning of period				60,846				68,789				77,710	60,846	68,789	77,710
Cash and cash equivalents at end of period	736,277				60,846				68,789				736,277	60,846	68,789
Parent Company
Operating activities:
Net income													74,854	110,432	105,491
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed earnings of subsidiary													(80,996)	(5,102)	(5,149)
Gain on sale of marketable securities													0	(29)	(146)
Net change in other assets and liabilities													128,287	(43,453)	91,520
Net cash provided by operating activities													122,145	61,848	191,716
Investing activities:
Net purchase sale of marketable securities													0	0	(550)
Net cash provided used in investing activities													0	0	(550)
Financing activities:
Cash dividends paid on common stock													(93,132)	(76,173)	(69,921)
Repurchase of Northwest stock													(9,276)	0	0
Proceeds from stock options exercised													1,479	9,727	8,191
Net cash provided by financing activities													(100,929)	(66,446)	(61,730)
Net increase/(decrease) in cash and cash equivalents													21,216	(4,598)	129,436
Cash and cash equivalents at beginning of period				$ 150,926				$ 155,524				$ 26,088	150,926	155,524	26,088
Cash and cash equivalents at end of period	$ 172,142				$ 150,926				$ 155,524				$ 172,142	$ 150,926	$ 155,524

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) - Designated as Hedging Instrument $ in Millions	3 Months Ended
	Sep. 30, 2020USD ($)	Mar. 31, 2020USD ($)derivative
Derivative [Line Items]
Reclassified loss earning	$ 1.3
Interest rate swaps
Derivative [Line Items]
Number of instruments held | derivative		4
Notional amount		$ 100
Interest rate swaps | Minimum
Derivative [Line Items]
Term of contract		5 years
Interest rate swaps | Maximum
Derivative [Line Items]
Term of contract		3 years

Derivative Financial Instrume_4

Derivative Financial Instruments - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Asset derivatives, notional amount	$ 796,131	$ 421,026
Derivative assets, fair value	61,433	21,593
Liability derivatives, notional amount	676,832	432,666
Liability derivatives, fair value	54,665	20,991
Derivatives not designated as hedging instruments: | Interest rate swap agreements
Derivative [Line Items]
Asset derivatives, notional amount	599,300	391,502
Derivative assets, fair value	53,863	20,889
Liability derivatives, notional amount	599,300	391,502
Liability derivatives, fair value	54,579	20,952
Derivatives not designated as hedging instruments: | Interest rate lock commitments
Derivative [Line Items]
Asset derivatives, notional amount	171,357	24,373
Derivative assets, fair value	6,465	559
Liability derivatives, notional amount	0	0
Liability derivatives, fair value	0	0
Derivatives not designated as hedging instruments: | Forward commitments
Derivative [Line Items]
Asset derivatives, notional amount	25,474	5,151
Derivative assets, fair value	1,105	145
Liability derivatives, notional amount	0	0
Liability derivatives, fair value	0	0
Derivatives not designated as hedging instruments: | Risk participation agreements
Derivative [Line Items]
Asset derivatives, notional amount	0	0
Derivative assets, fair value	0	0
Liability derivatives, notional amount	77,532	41,164
Liability derivatives, fair value	$ 86	$ 39

Derivative Financial Instrume_5

Derivative Financial Instruments - Gain (Loss) on Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Increase/(decrease) in interest expense	$ (35)	$ 0	$ 949
Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on non-hedging swap derivatives	(700)	(63)	(288)
Mortgage Banking Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on non-hedging swap derivatives	$ 6,867	$ 0	$ 0

Selected Quarterly Financial _3

Selected Quarterly Financial Data - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 111,729	$ 113,414	$ 108,547	$ 100,378	$ 103,418	$ 106,866	$ 106,807	$ 100,289	$ 97,768	$ 95,605	$ 92,875	$ 89,533	$ 434,068	$ 417,380	$ 375,781
Interest expense	8,841	9,880	10,469	13,150	14,473	15,930	14,204	12,307	10,937	9,788	8,649	7,766	42,340	56,914	37,140
Net interest income	102,888	103,534	98,078	87,228	88,945	90,936	92,603	87,982	86,831	85,817	84,226	81,767	391,728	360,466	338,641
Provision for credit losses	(2,230)	6,818	51,750	27,637	8,223	3,302	4,667	6,467	3,792	6,982	5,349	4,209	83,975	22,659	20,332
Noninterest income	32,123	36,670	35,496	27,976	28,213	26,169	23,363	21,662	23,248	22,557	24,109	21,788	132,265	99,407	91,702
Noninterest expense	92,849	86,869	89,163	78,611	76,571	70,596	77,512	71,424	72,273	66,617	69,787	67,421	347,492	296,103	276,098
Income before income taxes	44,392	46,517	(7,339)	8,956	32,364	43,207	33,787	31,753	34,014	34,775	33,199	31,925	92,526	141,111	133,913
Income tax expense/ (benefit)	9,327	8,467	(1,139)	1,017	6,773	9,793	7,404	6,709	7,547	7,035	6,900	6,940	17,672	30,679	28,422
Net income	$ 35,065	$ 38,050	$ (6,200)	$ 7,939	$ 25,591	$ 33,414	$ 26,383	$ 25,044	$ 26,467	$ 27,740	$ 26,299	$ 24,985	$ 74,854	$ 110,432	$ 105,491
Basic earnings/(loss) per share (in dollars per share)	$ 0.28	$ 0.30	$ (0.05)	$ 0.08	$ 0.24	$ 0.32	$ 0.25	$ 0.24	$ 0.26	$ 0.27	$ 0.26	$ 0.25	$ 0.62	$ 1.05	$ 1.03
Diluted earnings/ (loss) per share (in dollars per share)	$ 0.28	$ 0.30	$ (0.05)	$ 0.07	$ 0.24	$ 0.31	$ 0.25	$ 0.24	$ 0.26	$ 0.27	$ 0.25	$ 0.24	$ 0.62	$ 1.04	$ 1.02

Uncategorized Items - nwbi-2020

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201802Member