Northwest Bancshares (NWBI) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 31, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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
Entity Shell Company	false
Title of 12(b) Security	Common Stock, 0.01 Par Value
Trading Symbol	NWBI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		127,801,297
Entity Central Index Key	0001471265
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 656,749	$ 60,846
Marketable securities available-for-sale (amortized cost of $1,385,835 and $815,495, respectively)	1,409,150	819,901
Marketable securities held-to-maturity (fair value of $16,168 and $18,223, respectively)	15,333	18,036
Total cash and cash equivalents and marketable securities	2,081,232	898,783
Loans held-for-sale	25,140	7,709
Loans held for investment	10,756,712	8,800,965
Allowance for credit losses	(140,209)	(57,941)
Loans receivable, net	10,641,643	8,750,733
Federal Home Loan Bank stock, at cost	23,171	14,740
Accrued interest receivable	36,916	25,755
Real estate owned, net	2,575	950
Premises and equipment, net	166,919	147,409
Bank-owned life insurance	252,621	189,091
Goodwill	386,044	346,103
Other intangible assets, net	21,601	23,076
Other assets	176,083	97,268
Total assets	13,788,805	10,493,908
Liabilities:
Noninterest-bearing demand deposits	2,641,234	1,609,653
Interest-bearing demand deposits	2,663,878	1,944,108
Money market deposit accounts	2,396,567	1,863,998
Savings deposits	2,022,918	1,604,838
Time deposits	1,732,022	1,569,410
Total deposits	11,456,619	8,592,007
Borrowed funds	398,216	246,336
Junior subordinated debentures	128,729	121,800
Advances by borrowers for taxes and insurance	29,755	44,556
Accrued interest payable	1,002	1,142
Other liabilities	227,253	134,782
Total liabilities	12,241,574	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, 127,801,297 and 106,859,088 shares issued and outstanding, respectively	1,278	1,069
Additional paid-in capital	1,023,827	805,750
Retained earnings	544,695	583,407
Accumulated other comprehensive loss	(22,569)	(36,941)
Total shareholders’ equity	1,547,231	1,353,285
Total liabilities and shareholders’ equity	$ 13,788,805	$ 10,493,908

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Marketable securities available-for-sale, amortized cost	$ 1,385,835	$ 815,495
Marketable securities held-to-maturity, fair value	$ 16,168	$ 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)	127,801,297	106,859,088
Common stock, shares outstanding (in shares)	127,801,297	106,859,088

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans receivable	$ 107,241	$ 101,091	$ 305,226	$ 296,943
Mortgage-backed securities	4,652	4,188	12,865	12,433
Taxable investment securities	427	884	1,514	2,718
Tax-free investment securities	655	224	1,404	643
Federal Home Loan Bank stock dividends	218	307	789	794
Interest-earning deposits	221	172	541	431
Total interest income	113,414	106,866	322,339	313,962
Interest expense:
Deposits	8,443	13,694	29,182	36,323
Borrowed funds	1,437	2,236	4,317	6,118
Total interest expense	9,880	15,930	33,499	42,441
Net interest income	103,534	90,936	288,840	271,521
Provision for credit losses	6,818	3,302	86,205	14,436
Net interest income after provision for credit losses	96,716	87,634	202,635	257,085
Noninterest income:
Gain/(loss) on sale of investments	(12)	0	161	23
Gain on sale of loans	0	826	1,302	826
Service charges and fees	14,354	13,558	42,539	38,940
Trust and other financial services income	5,376	4,609	15,200	13,248
Insurance commission income	2,331	1,887	7,098	6,210
Loss on real estate owned, net	(32)	(227)	(220)	(139)
Income from bank-owned life insurance	1,576	1,095	3,860	3,297
Mortgage banking income	11,055	1,921	24,271	2,325
Other operating income	2,022	2,500	5,931	6,464
Total noninterest income	36,670	26,169	100,142	71,194
Noninterest expense:
Compensation and employee benefits	47,371	40,816	130,166	121,012
Premises and occupancy costs	8,342	7,061	23,008	21,666
Office operations	4,626	3,197	11,719	10,036
Collections expense	1,264	747	2,382	1,994
Processing expenses	15,042	11,122	37,864	32,190
Marketing expenses	2,147	1,373	5,701	5,988
Federal deposit insurance premiums	1,498	(702)	3,116	685
Professional services	3,246	3,032	8,883	8,754
Amortization of intangible assets	1,781	1,702	5,192	4,909
Real estate owned expense	111	119	295	406
Acquisition/branch optimization expense	1,414	23	13,551	3,054
Other expenses	27	2,106	12,766	8,838
Total noninterest expense	86,869	70,596	254,643	219,532
Income before income taxes	46,517	43,207	48,134	108,747
Federal and state income taxes expense	8,467	9,793	8,345	23,906
Net income	$ 38,050	$ 33,414	$ 39,789	$ 84,841
Basic earnings per share (in dollars per share)	$ 0.30	$ 0.32	$ 0.34	$ 0.81
Diluted earnings per share (in dollars per share)	$ 0.30	$ 0.31	$ 0.34	$ 0.80

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 38,050	$ 33,414	$ 39,789	$ 84,841
Net unrealized holding gains on marketable securities:
Unrealized holding gains net of tax of $(107), $(525), $(5,286), and $(4,549), respectively	676	1,315	13,623	11,376
Reclassification adjustment for (gains)/losses included in net income, net of tax of $1, $0, $0, and $1 respectively	(1)	(1)	1	(3)
Net unrealized holding gains on marketable securities	675	1,314	13,624	11,373
Change in fair value of interest rate swaps
Unrealized holding losses on interest rate swaps, net of tax of $0, $0, $209, and $0, respectively	0	0	(946)	0
Reclassification adjustment for losses included in net income, net of tax of $(375), $0, $(375), and $0	946	0	946	0
Net change in fair value of interest rate swaps	946	0	0	0
Defined benefit plan:
Actuarial reclassification adjustments for prior period service costs and actuarial losses included in net income, net of tax of $(99), $(83), $(297), and $(250), respectively	250	208	748	626
Other comprehensive income	1,871	1,522	14,372	11,999
Total comprehensive income	$ 39,921	$ 34,936	$ 54,161	$ 96,840

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Unrealized holding gains (losses), tax	$ (107)	$ (525)	$ (5,286)	$ (4,549)
Reclassification adjustment for gains included in net income, tax	1	0	0	1
Unrealized holding losses on interest rate swaps, tax	0	0	209	0
Reclassification adjustment for losses included in net income, tax	(375)	0	(375)	0
Reclassification adjustments for prior period service costs and net losses included in net income, tax	$ (99)	$ (83)	$ (297)	$ (250)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	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 loss
Balance beginning of the period (in shares) at Dec. 31, 2018			103,354,030
Balance beginning of the period at Dec. 31, 2018	$ 1,257,638,000	$ (1,226,000)	$ 1,034,000	$ 745,926,000	$ 550,374,000	$ (1,226,000)	$ (39,696,000)
Comprehensive income:
Net income	84,841,000				84,841,000
Other comprehensive income, net	11,999,000						11,999,000
Total comprehensive income	96,840,000				84,841,000		11,999,000
Acquisition of Union Community Bank (UCB) (in shares)			2,462,373
Acquisition of Union Community Bank ("UCB")	43,288,000		$ 24,000	43,264,000
Exercise of stock options (in shares)			609,722
Exercise of stock options	6,783,000		$ 6,000	6,777,000
Stock-based compensation expense (in shares)			281,100
Stock-based compensation expense	5,418,000		$ 3,000	5,415,000
Stock-based compensation forfeited (in shares)			(49,158)
Stock-based compensation forfeited	0
Dividends paid	(56,971,000)				(56,971,000)
Balance end of period (in shares) at Sep. 30, 2019			106,658,067
Balance end of the period at Sep. 30, 2019	$ 1,351,770,000		$ 1,067,000	801,382,000	577,018,000		(27,697,000)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance beginning of the period (in shares) at Dec. 31, 2018			103,354,030
Balance beginning of the period at Dec. 31, 2018	$ 1,257,638,000	(1,226,000)	$ 1,034,000	745,926,000	550,374,000	(1,226,000)	(39,696,000)
Balance end of period (in shares) at Dec. 31, 2019			106,859,088
Balance end of the period at Dec. 31, 2019	1,353,285,000	(9,649,000)	$ 1,069,000	805,750,000	583,407,000	(9,649,000)	(36,941,000)
Balance beginning of the period (in shares) at Jun. 30, 2019			106,614,607
Balance beginning of the period at Jun. 30, 2019	1,333,588,000		$ 1,066,000	798,942,000	562,799,000		(29,219,000)
Comprehensive income:
Net income	33,414,000				33,414,000
Other comprehensive income, net	1,522,000						1,522,000
Total comprehensive income	34,936,000				33,414,000		1,522,000
Exercise of stock options (in shares)			61,867
Exercise of stock options	757,000		$ 1,000	756,000
Stock-based compensation expense	1,684,000			1,684,000
Stock-based compensation forfeited (in shares)			(18,407)
Stock-based compensation forfeited	0
Dividends paid	(19,195,000)				(19,195,000)
Balance end of period (in shares) at Sep. 30, 2019			106,658,067
Balance end of the period at Sep. 30, 2019	$ 1,351,770,000		$ 1,067,000	801,382,000	577,018,000		(27,697,000)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance beginning of the period (in shares) at Dec. 31, 2019			106,859,088
Balance beginning of the period at Dec. 31, 2019	$ 1,353,285,000	$ (9,649,000)	$ 1,069,000	805,750,000	583,407,000	$ (9,649,000)	(36,941,000)
Comprehensive income:
Net income	39,789,000				39,789,000
Other comprehensive income, net	14,372,000						14,372,000
Total comprehensive income	54,161,000				39,789,000		14,372,000
Acquisition of Union Community Bank (UCB) (in shares)			20,658,957
Acquisition of Union Community Bank ("UCB")	213,406,000		$ 206,000	213,200,000
Exercise of stock options (in shares)			87,305
Exercise of stock options	1,006,000		$ 1,000	1,005,000
Stock-based compensation expense (in shares)			282,691
Stock-based compensation expense	3,769,000		$ 3,000	3,766,000
Stock-based compensation forfeited (in shares)			(86,744)
Stock-based compensation forfeited	0		$ (1,000)	1,000
Other	105,000			105,000
Dividends paid	(68,852,000)				(68,852,000)
Balance end of period (in shares) at Sep. 30, 2020			127,801,297
Balance end of the period at Sep. 30, 2020	1,547,231,000		$ 1,278,000	1,023,827,000	544,695,000		(22,569,000)
Balance beginning of the period (in shares) at Jun. 30, 2020			127,838,400
Balance beginning of the period at Jun. 30, 2020	1,530,849,000		$ 1,278,000	1,023,083,000	530,928,000		(24,440,000)
Comprehensive income:
Net income	38,050,000				38,050,000
Other comprehensive income, net	1,871,000						1,871,000
Total comprehensive income	39,921,000				38,050,000		1,871,000
Stock-based compensation expense	743,000			743,000
Stock-based compensation forfeited (in shares)			(37,103)
Stock-based compensation forfeited	1,000			1,000
Dividends paid	(24,283,000)				(24,283,000)
Balance end of period (in shares) at Sep. 30, 2020			127,801,297
Balance end of the period at Sep. 30, 2020	$ 1,547,231,000		$ 1,278,000	$ 1,023,827,000	$ 544,695,000		$ (22,569,000)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax	$ (581)	$ (608)	$ (5,749)	$ (4,799)
Dividends paid, per share (in dollars per share)	$ 0.19	$ 0.18	$ 0.57	$ 0.54

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 39,789	$ 84,841
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	86,205	14,436
Net gain on sale of assets	(2,322)	(490)
Gain on sale of mortgage loans, net	(16,676)	0
Net depreciation and amortization	6,625	927
Increase in other assets	(28,825)	(64,306)
Increase in other liabilities	79,299	74,974
Net amortization on marketable securities	2,240	677
Noncash compensation expense related to stock benefit plans	3,769	5,418
Noncash write-down of real estate owned	272	548
Deferred income tax (benefit)/expense	(15,812)	1,706
Origination of loans held-for-sale	(472,121)	(31,776)
Proceeds from sale of loans held-for-sale	471,367	23,764
Net cash provided by operating activities	153,810	110,719
Investing activities:
Purchase of marketable securities available-for-sale	(730,096)	(123,655)
Proceeds from maturities and principal reductions of marketable securities held-to-maturity	2,694	3,788
Proceeds from maturities and principal reductions of marketable securities available-for-sale	284,532	178,775
Proceeds from sale of marketable securities available-for-sale	8	32,389
Proceeds from bank-owned life insurance	596	2,638
Loan originations	(3,640,293)	(2,724,061)
Proceeds from loan maturities and principal reductions	3,132,329	2,288,521
Proceeds from sale of loans held for investment	50,791	46,783
Net purchases/(proceeds) of Federal Home Loan Bank stock	4,684	(5,313)
Proceeds from sale of real estate owned	1,062	3,274
Proceeds from sale of real estate owned for investment, net	455	456
Purchase of premises and equipment	(10,808)	(9,302)
Acquisitions, net of cash received	261,712	(25,834)
Net cash used in investing activities	(642,334)	(331,541)
Financing activities:
Net increase in deposits	1,247,573	307,942
Proceeds from long-term borrowings	123,247	0
Repayments of long-term borrowings	(112,253)	0
Net increase/(decrease) in short-term borrowings	(89,504)	20,868
Increase in advances by borrowers for taxes and insurance	(16,790)	(18,987)
Cash dividends paid on common stock	(68,852)	(56,971)
Proceeds from stock options exercised	1,006	6,783
Net cash provided by financing activities	1,084,427	259,635
Net increase in cash and cash equivalents	595,903	38,813
Cash and cash equivalents at beginning of period	60,846	68,789
Cash and cash equivalents at end of period	656,749	107,602
Cash paid during the period for:
Interest on deposits and borrowings (including interest credited to deposit accounts of $27,668 and $32,893, respectively)	33,639	39,632
Income taxes	21,800	15,052
Business acquisitions:
Fair value of assets acquired	2,090,599	580,407
Northwest Bancshares, Inc. common stock issued	(213,406)	(43,288)
Net cash paid	0	(42,500)
Liabilities assumed	1,877,193	494,619
Non-cash activities:
Loan foreclosures and repossessions	4,216	4,349
Sale of real estate owned financed by the Company	$ 0	$ 44

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Interest on deposits and borrowings, interest credited to deposit accounts	$ 27,668	$ 32,893

Basis of Presentation and Infor

Basis of Presentation and Informational Disclosures	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Informational Disclosures	Basis of Presentation and Informational Disclosures Northwest Bancshares, Inc. (the “Company” or “NWBI”), a Maryland corporation headquartered in Warren, Pennsylvania, is a savings and loan holding company regulated by the Board of Governors of the Federal Reserve System. The primary activity of the Company is the ownership of all of the issued and outstanding common stock of Northwest Bank, a Pennsylvania-chartered savings bank (“Northwest”). Northwest is regulated by the Federal Deposit Insurance Corporation ("FDIC") and the Pennsylvania Department of Banking. Northwest operates 213 community-banking offices throughout Pennsylvania, Western New York, Eastern Ohio, and Indiana. The accompanying unaudited Consolidated Financial Statements include the accounts of the Company and its subsidiary, Northwest, and Northwest’s subsidiaries Northwest Capital Group, Inc., Allegheny Services, Inc., Great Northwest Corporation, The Bert Company (doing business as Northwest Insurance Services) and MutualFirst Investment Company, Inc. The unaudited Consolidated Financial Statements have been prepared in accordance with United States generally accepted accounting principles for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information or footnotes required for complete annual financial statements. In the opinion of management, all adjustments necessary for the fair presentation of the Company’s financial position and results of operations have been included. The Consolidated Financial Statements have been prepared using the accounting policies described in the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 updated, as required, for any new pronouncements or changes. Certain items previously reported have been reclassified to conform to the current year's reporting format. The results of operations for the quarter ended September 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020, or any other period. Stock-Based Compensation On May 20, 2020, the Company awarded employees 556,476 stock options and directors 57,600 stock options with an exercise price of $9.71 and grant date fair value of $0.13 per stock option, and the Company awarded employees 261,091 restricted common shares and directors 21,600 restricted common shares with a grant date fair value of $9.71. Awarded stock options and common shares vest over a seven-year period with the first vesting occurring on the grant date. Stock-based compensation expense of $743,000 and $1.7 million for the quarters ended September 30, 2020 and 2019, and $3.8 million and $5.4 million for the nine months ended September 30, 2020 and 2019, respectively, was recognized in compensation expense relating to our stock benefit plans. At September 30, 2020, there was compensation expense of $2.5 million to be recognized for awarded but unvested stock options and $12.7 million for unvested restricted common shares. Income Taxes-Uncertain Tax Positions Accounting standards prescribe a comprehensive model for how a company should recognize, measure, present and disclose in its financial statements uncertain tax positions that the company has taken or expects to take on a tax return. A tax benefit from an uncertain position may be recognized only if it is “more likely than not” that the position is sustainable, based on its technical merits. The tax benefit of a qualifying position is the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority having full knowledge of all relevant information. At September 30, 2020, we had no liability for unrecognized tax benefits. We recognize interest accrued related to: (1) unrecognized tax benefits in other expenses and (2) refund claims in other operating income. We recognize penalties (if any) in other expenses. We are subject to audit by the Internal Revenue Service and any state in which we conduct business for the tax periods ended December 31, 2019, 2018, and 2017. 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 We also adopted ASC 326 using the prospective transition approach for financial assets Purchased with Credit Deterioration (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. Adoption of this standard resulted to changes in our Investment Securities, Loans Receivable and Allowance for Credit Loss and Provision for Credit Losses accounting policies as presented below. Refer to Note 1 to the Consolidated Financial Statements in our 2019 Annual Report on Form 10-K regarding additional significant accounting policies, including policies in effect prior to the adoption of the CECL standard. Investment 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 quarter ended September 30, 2020. 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 $1.4 million and $1.5 million at September 30, 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 $1.7 million and $900,000 at September 30, 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 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 $33.5 million and $23.3 million at September 30, 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 September 30, 2020. The accrual status of these loans will be re-assessed at the end of their deferral period. 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. At September 30, 2020 and December 31, 2019, there were $25.1 million and $7.7 million of residential mortgage loans classified as held-for-sale, respectively. Acquired loans that are not considered 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. 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 loan-level wherever possible, but it is sometimes measured at the portfolio level when there is no added benefit to being measured at the loan-level. We use a twelve-month forecasting period and revert to historical average loss rates thereafter. Reversion to the mean takes place over a twelve month period. Historical average loss rates are calculated using historical data beginning in 2009 through the current period. Mortgage and Home Equity Loans The allowance for credit losses within the mortgage and home equity loan classes is calculated at the loan-level using a proprietary statistical 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 proprietary statistical 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 losses within the consumer loan portfolio is calculated at the portfolio-level using a suite of proprietary statistical 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 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 loan-level using a proprietary statistical 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 proprietary statistical model. 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 loan-level using a proprietary statistical 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 the 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 proprietary statistical model. 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. 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 10, "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	9 Months Ended
	Sep. 30, 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 (in thousands): 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 Federal Home Loan Bank stock 13,115 Premises and equipment 19,094 Core deposit intangible 3,717 Other assets 118,025 Deposits (1,617,039) Borrowings (232,200) Junior subordinated debentures (6,804) Other liabilities (21,150) Total identifiable net assets $ 173,465 Goodwill $ 39,941 (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 nine months ended September 30, 2020, which included technology and communications costs, professional services, marketing and advertising, and other noninterest expenses.

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities The following table shows the portfolio of marketable securities available-for-sale at September 30, 2020 (in thousands): Amortized Gross Gross Fair Debt issued by the U.S government and agencies: Due after ten years $ 34,000 176 — 34,176 Debt issued by government sponsored enterprises: Due in less than one year 35,731 284 — 36,015 Due in one year through five years 253 4 — 257 Due in five years through ten years 69,135 170 (178) 69,127 Municipal securities: Due in less than one year 4,241 18 — 4,259 Due in one year through five years 3,343 73 (2) 3,414 Due in five years through ten years 11,077 312 — 11,389 Due after ten years 92,530 2,930 — 95,460 Residential mortgage-backed securities: Fixed rate pass-through 356,898 6,467 (102) 363,263 Variable rate pass-through 15,798 538 (18) 16,318 Fixed rate agency CMOs 710,620 13,035 (722) 722,933 Variable rate agency CMOs 52,209 369 (39) 52,539 Total residential mortgage-backed securities 1,135,525 20,409 (881) 1,155,053 Total marketable securities available-for-sale $ 1,385,835 24,376 (1,061) 1,409,150 The following table shows the portfolio of marketable securities available-for-sale at December 31, 2019 (in thousands): Amortized Gross Gross Fair 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 The following table shows the portfolio of marketable securities held-to-maturity at September 30, 2020 (in thousands): Amortized Gross Gross Fair Residential mortgage-backed securities: Fixed rate pass-through $ 1,823 128 — 1,951 Variable rate pass-through 970 33 — 1,003 Fixed rate agency CMOs 11,936 659 — 12,595 Variable rate agency CMOs 604 15 — 619 Total residential mortgage-backed securities 15,333 835 — 16,168 Total marketable securities held-to-maturity $ 15,333 835 — 16,168 The following table shows the portfolio of marketable securities held-to-maturity at December 31, 2019 (in thousands): Amortized Gross Gross Fair 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 shows the contractual maturity of our marketable securities held-to-maturity at September 30, 2020 (in thousands): Amortized Fair Residential mortgage-backed securities: Due in one year through five years $ 1,256 1,330 Due after ten years 14,077 14,838 Total residential mortgage-backed securities 15,333 16,168 Total marketable securities held-to-maturity $ 15,333 16,168 The following table shows the fair value of and gross unrealized losses on available-for-sale marketable 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 September 30, 2020 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ 44,892 (93) 2,081 (85) 46,973 (178) Municipal securities 178 (2) — — 178 (2) Residential mortgage-backed securities - agency 236,675 (845) 6,132 (36) 242,807 (881) Total temporarily impaired securities $ 281,745 (940) 8,213 (121) 289,958 (1,061) The following table shows the fair value of and gross unrealized losses on marketable 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 (in thousands): 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 - agency 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 September 30, 2020, which were comprised of 106 individual securities, represents a credit loss impairment. All of these securities were issued by U.S. government agencies or U.S. government-sponsored agencies. There 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 debt securities are issued by U.S. government agencies or U.S. government-sponsored agencies. There 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. Additionally, all held-to-maturity debt securities were in an unrealized gain position as of September 30, 2020. Therefore, the Company did not record an allowance for credit losses for these securities as of September 30, 2020. The following table presents the credit quality of our held-to-maturity securities, based on the latest information available as of September 30, 2020. The credit ratings are sourced from nationally recognized rating agencies, which include 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 September 30, 2020. AA+ Total Held-to-maturity securities: Residential mortgage-backed securities $ 15,333 15,333 Total marketable securities held-to-maturity $ 15,333 15,333

Loans Receivable

Loans Receivable	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans Receivable	Loans Receivable The following table shows a summary of our loans receivable at amortized cost basis at September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,794,489 348,880 3,143,369 2,785,189 82,938 2,868,127 Home equity loans 1,169,709 314,656 1,484,365 1,099,514 243,404 1,342,918 Vehicle loans 960,178 172,662 1,132,840 850,804 10,388 861,192 Consumer loans 282,042 72,201 354,243 238,343 25,597 263,940 Total Personal Banking 5,206,418 908,399 6,114,817 4,973,850 362,327 5,336,177 Commercial Banking: Commercial real estate loans 2,123,387 644,501 2,767,888 1,915,949 312,160 2,228,109 Commercial real estate loans - owner occupied 365,580 186,275 551,855 433,099 93,182 526,281 Commercial loans 1,147,492 199,800 1,347,292 664,159 53,948 718,107 Total Commercial Banking 3,636,459 1,030,576 4,667,035 3,013,207 459,290 3,472,497 Total loans receivable, gross 8,842,877 1,938,975 10,781,852 7,987,057 821,617 8,808,674 Allowance for credit losses (109,580) (30,629) (140,209) (51,439) (6,502) (57,941) Total loans receivable, net (2) $ 8,733,297 1,908,346 10,641,643 7,935,618 815,115 8,750,733 (1) Includes $25.1 million and $7.7 million of loans held-for-sale at September 30, 2020 and December 31, 2019, respectively. (2) Includes $34.2 million and $40.2 million of net unearned income, unamortized premiums and discounts and deferred fees and costs at September 30, 2020 and December 31, 2019, respectively. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the quarter ended September 30, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of September 30, 2020 Current Charge-offs Recoveries Initial ACL on loans purchased with credit deterioration Balance as of June 30, 2020 Allowance for Credit Losses Personal Banking: Residential mortgage loans $ 12,036 268 (129) 189 — 11,708 Home equity loans 9,585 183 (88) 127 — 9,363 Vehicle loans 16,713 4,111 (1,763) 530 — 13,835 Consumer loans 3,147 1,871 (1,593) 363 — 2,506 Total Personal Banking 41,481 6,433 (3,573) 1,209 — 37,412 Commercial Banking: Commercial real estate loans 73,410 780 (470) 267 — 72,833 Commercial real estate loans - owner occupied 13,570 (1,205) (62) 10 — 14,827 Commercial loans 11,748 810 (4,892) 316 — 15,514 Total Commercial Banking 98,728 385 (5,424) 593 — 103,174 Total $ 140,209 6,818 (8,997) 1,802 — 140,586 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 3 3 — — — — Home equity loans 40 2 — — — 38 Total Personal Banking 43 5 — — — 38 Commercial Banking: Commercial real estate loans 2,423 (2,712) — — — 5,135 Commercial real estate loans - owner occupied 469 (157) — — — 626 Commercial loans 3,312 (1,072) — — — 4,384 Total Commercial Banking 6,204 (3,941) — — — 10,145 Total off-balance sheet exposure $ 6,247 (3,936) — — — 10,183 . The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the quarter ended September 30, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of September 30, 2019 Current Charge-offs Recoveries Balance as of June 30, 2019 Originated loans Personal Banking: Residential mortgage loans $ 2,507 (1,361) (109) 68 3,909 Home equity loans 2,791 (81) (176) 58 2,990 Consumer loans 12,175 3,779 (2,975) 605 10,766 Total Personal Banking 17,473 2,337 (3,260) 731 17,665 Commercial Banking: Commercial real estate loans 20,215 (1,206) (261) 720 20,962 Commercial loans 9,729 958 (1,118) 87 9,802 Total Commercial Banking 29,944 (248) (1,379) 807 30,764 Total originated loans 47,417 2,089 (4,639) 1,538 48,429 Acquired loans Personal Banking: Residential mortgage loans 92 41 (81) 28 104 Home equity loans 295 220 (290) 21 344 Consumer loans 554 63 (103) 83 511 Total Personal Banking 941 324 (474) 132 959 Commercial Banking: Commercial real estate loans 3,622 1,155 (128) 24 2,571 Commercial loans 879 (266) (33) 30 1,148 Total Commercial Banking 4,501 889 (161) 54 3,719 Total acquired loans 5,442 1,213 (635) 186 4,678 Total $ 52,859 3,302 (5,274) 1,724 53,107 The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of September 30, 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 $ 12,036 1,132 (510) 304 1,095 7,441 2,574 Home equity loans 9,585 536 (550) 408 216 5,786 3,189 Vehicle loans 16,713 12,419 (5,369) 1,294 235 842 7,292 Consumer loans 3,147 3,600 (4,666) 1,179 157 (2,424) 5,301 Total Personal Banking 41,481 17,687 (11,095) 3,185 1,703 11,645 18,356 Commercial Banking: Commercial real estate loans 73,410 50,018 (1,470) 1,011 5,720 2,288 15,843 Commercial real estate loans - owner occupied 13,570 5,642 (83) 25 963 1,278 5,745 Commercial loans 11,748 12,858 (16,056) 909 459 (4,419) 17,997 Total Commercial Banking 98,728 68,518 (17,609) 1,945 7,142 (853) 39,585 Total $ 140,209 86,205 (28,704) 5,130 8,845 10,792 57,941 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 3 3 — — — — — Home equity loans 40 10 — — — (293) 323 Consumer loans — — — — — (402) 402 Total Personal Banking 43 13 — — — (695) 725 Commercial Banking: Commercial real estate loans 2,423 412 — — — 1,934 77 Commercial real estate loans - owner occupied 469 378 — — — 88 3 Commercial loans 3,312 2,220 — — — 923 169 Total Commercial Banking 6,204 3,010 — — — 2,945 249 Total off-balance sheet exposure $ 6,247 3,023 — — — 2,250 974 * Includes the impact of the initial allowance on PCD loans of $517,000. During the nine months ended September 30, 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. No loans were sold during the three months ended September 30, 2020. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of September 30, 2019 Current Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 2,507 (991) (847) 291 4,054 Home equity loans 2,791 36 (536) 107 3,184 Consumer loans 12,175 7,737 (8,492) 1,850 11,080 Total Personal Banking 17,473 6,782 (9,875) 2,248 18,318 Commercial Banking: Commercial real estate loans 20,215 (2,177) (4,978) 991 26,379 Commercial loans 9,729 4,769 (2,449) 355 7,054 Total Commercial Banking 29,944 2,592 (7,427) 1,346 33,433 Total originated loans 47,417 9,374 (17,302) 3,594 51,751 Acquired loans Personal Banking: Residential mortgage loans 92 50 (97) 56 83 Home equity loans 295 249 (472) 170 348 Consumer loans 554 131 (173) 177 419 Total Personal Banking 941 430 (742) 403 850 Commercial Banking: Commercial real estate loans 3,622 1,432 (382) 576 1,996 Commercial loans 879 3,200 (3,059) 121 617 Total Commercial Banking 4,501 4,632 (3,441) 697 2,613 Total acquired loans 5,442 5,062 (4,183) 1,100 3,463 Total $ 52,859 14,436 (21,485) 4,694 55,214 The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at September 30, 2020 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 3,143,369 12,036 16,514 — 8,464 891 — Home equity loans 1,484,365 9,585 9,274 — 2,090 578 26 Vehicle loans 1,132,840 16,713 5,659 — — — — Consumer loans 354,243 3,147 938 495 1 — — Total Personal Banking 6,114,817 41,481 32,385 495 10,555 1,469 26 Commercial Banking: Commercial real estate loans 2,767,888 73,410 57,794 — 18,599 1,625 71 Commercial real estate loans - owner occupied 551,855 13,570 3,749 — 920 186 349 Commercial loans 1,347,292 11,748 12,870 — 4,730 195 236 Total Commercial Banking 4,667,035 98,728 74,413 — 24,249 2,006 656 Total $ 10,781,852 140,209 106,798 495 34,804 3,475 682 (1) Includes $17.1 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 nine months ended September 30, 2020 (in thousands): Nonaccrual loans at January 1, 2020 Nonaccrual loans at September 30, 2020 with an allowance Nonaccrual loans with no allowance Loans 90 days past due and accruing Personal Banking: Residential mortgage loans $ 14,476 16,514 — — Home equity loans 6,745 8,818 456 — Vehicle loans 3,147 5,562 97 — Consumer loans 1,079 927 11 495 Total Personal Banking 25,447 31,821 564 495 Commercial Banking: Commercial real estate loans 18,832 40,123 17,671 — Commercial real estate loans - owner occupied 16,032 3,748 1 — Commercial loans 8,559 8,790 4,080 — Total Commercial Banking 43,423 52,661 21,752 — Total $ 68,870 84,482 22,316 495 During the three and nine months ended September 30, 2020, we recognized $186,000 and $574,000 of interest income on nonaccrual loans. The following table presents the amortized cost basis of collateral-dependent loans by class of loans as of September 30, 2020 (in thousands): Real estate Equipment Other Total Personal Banking: Residential mortgage loans $ 1,338 — — 1,338 Home equity loans 100 — — 100 Total Personal Banking 1,438 — — 1,438 Commercial Banking: Commercial real estate loans 32,390 — 2,080 34,470 Commercial loans 4,280 2,003 1,575 7,858 Total Commercial Banking 36,670 2,003 3,655 42,328 Total $ 38,108 2,003 3,655 43,766 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 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 quarter ended September 30, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 167 $ 35,450 183 $ 31,269 New TDRs 7 803 3 520 Re-modified TDRs 3 6,679 8 4,773 Net paydowns — (8,127) — (5,668) Charge-offs: Residential mortgage loans — — — — Home equity loans — — — — Vehicle loans — — — — Commercial real estate loans — — — — Commercial real estate loans - owner occupied — — — — Commercial loans — — 2 (235) Paid-off loans: Residential mortgage loans — — — — Home equity loans — — 3 (68) Vehicle loans — — — — Commercial real estate loans — — 3 (289) Commercial real estate loans - owner occupied — — — — Commercial loans 1 (1) 1 (2) Ending TDR balance: 173 $ 34,804 177 $ 30,300 Accruing TDRs $ 17,684 $ 21,162 Nonaccrual TDRs 17,120 9,138 For the nine months ended September 30, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 176 $ 31,999 195 $ 33,608 New TDRs 10 889 5 826 Re-modified TDRs 5 9,720 8 4,773 Net paydowns — (7,192) — (6,454) 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) 4 (180) Home equity loans 2 (3) 7 (143) Vehicle loans — — — — Commercial real estate loans 1 (26) 9 (1,893) Commercial real estate loans - owner occupied 1 (25) — — Commercial loans 6 (218) 1 (2) Ending TDR balance: 173 $ 34,804 177 $ 30,300 Accruing TDRs $ 17,684 $ 21,162 Nonaccrual TDRs 17,120 9,138 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 quarter ended September 30, 2020 For the nine months ended September 30, 2020 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 90 89 1 1 $ 90 89 1 Home equity loans — — — — 2 86 81 14 Vehicle loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking 1 90 89 1 3 176 170 15 Commercial Banking: Commercial real estate loans 5 7,096 7,040 816 5 7,096 7,040 816 Commercial real estate loans - owner occupied — — — — 1 58 51 10 Commercial loans 4 444 353 — 5 2,944 2,354 2 Total Commercial Banking 9 7,540 7,393 816 11 10,098 9,445 828 Total 10 $ 7,630 7,482 817 14 $ 10,274 9,615 843 For the quarter ended September 30, 2019 For the nine months ended September 30, 2019 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 121 121 8 1 $ 121 121 8 Home equity loans 1 12 11 2 1 12 11 2 Vehicle loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking 2 133 132 10 2 133 132 10 Commercial Banking: Commercial real estate loans 8 6,014 5,120 549 9 6,314 5,417 581 Commercial real estate loans - owner occupied — — — — — — — — Commercial loans 1 55 41 4 2 65 50 5 Total Commercial Banking 9 6,069 5,161 553 11 6,379 5,467 586 Total 11 $ 6,202 5,293 563 13 $ 6,512 5,599 596 The following table provides information as of September 30, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended September 30, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 89 — 89 Home equity loans — — — — — — Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 1 — — 89 — 89 Commercial Banking: Commercial real estate loans 5 — — 6,755 285 7,040 Commercial real estate loans - owner occupied — — — — — — Commercial loans 4 — 114 239 — 353 Total Commercial Banking 9 — 114 6,994 285 7,393 Total 10 $ — 114 7,083 285 7,482 The following table provides information as of September 30, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended September 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 121 — 121 Home equity loans 1 — — 11 — 11 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 2 — — 132 — 132 Commercial Banking: Commercial real estate loans 8 — 222 4,898 — 5,120 Commercial real estate loans - owner occupied — — — — — — Commercial loans 1 — — 41 — 41 Total Commercial Banking 9 — 222 4,939 — 5,161 Total 11 $ — 222 5,071 — 5,293 The following table provides information as of September 30, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 89 — 89 Home equity loans 2 66 — 15 — 81 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 3 66 — 104 — 170 Commercial Banking: Commercial real estate loans 5 — — 6,755 285 7,040 Commercial real estate loans - owner occupied 1 — — 51 — 51 Commercial loans 5 — 114 239 2,001 2,354 Total Commercial Banking 11 — 114 7,045 2,286 9,445 Total 14 $ 66 114 7,149 2,286 9,615 The following table provides information as of September 30, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 121 — 121 Home equity loans 1 — — 11 — 11 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 2 — — 132 — 132 Commercial Banking: Commercial real estate loans 9 — 519 4,898 — 5,417 Commercial real estate loans - owner occupied — — — — — — Commercial loans 2 — — 50 — 50 Total Commercial Banking 11 — 519 4,948 — 5,467 Total 13 $ — 519 5,080 — 5,599 No TDRs modified within the previous 12 months of September 30, 2020 subsequently defaulted. The following table provides information related to troubled debt restructurings modified within the previous twelve months of September 30, 2019 that subsequently defaulted: For the quarter ended September 30, 2019 For the nine months ended September 30, 2019 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans — $ — — — — $ — — — Home equity loans — — — — — — — — Other consumer loans — — — — — — — — Total Personal Banking — — — — — — — — Business Banking: Commercial real estate loans — — — — 2 2,785 2,775 5 Commercial loans 1 134 126 104 2 284 276 104 Total Business Banking 1 134 126 104 4 3,069 3,051 109 Total 1 $ 134 126 104 4 $ 3,069 3,051 109 The following table provides information related to the amortized cost basis of loan payment delinquencies at September 30, 2020 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Personal Banking: Residential mortgage loans $ 736 4,788 14,750 20,274 3,123,095 3,143,369 — Home equity loans 4,984 1,860 7,845 14,689 1,469,676 1,484,365 — Vehicle loans 5,980 2,281 4,530 12,791 1,120,048 1,132,839 — Consumer loans 2,606 768 1,317 4,691 349,553 354,244 495 Total Personal Banking 14,306 9,697 28,442 52,445 6,062,372 6,114,817 495 Commercial Banking: Commercial real estate loans 3,463 4,212 33,509 41,184 2,726,704 2,767,888 — Commercial real estate loans - owner occupied 1,627 — 1,987 3,614 548,241 551,855 — Commercial loans 1,797 357 6,310 8,464 1,338,828 1,347,292 — Total Commercial Banking 6,887 4,569 41,806 53,262 4,613,773 4,667,035 — Total loans $ 21,193 14,266 70,248 105,707 10,676,145 10,781,852 495 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 1,088,136 1,100,023 — Consumer loans 8,969 3,198 3,467 15,634 1,073,103 1,088,638 — 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 September 30, 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 $ 533,214 460,757 258,525 277,416 233,974 1,353,556 — — 3,117,442 Substandard — — 714 1,060 511 23,642 — — 25,927 Total residential mortgage loans 533,214 460,757 259,239 278,476 234,485 1,377,198 — — 3,143,369 Home equity loans Pass 215,458 210,955 103,761 96,142 88,061 239,862 478,598 39,082 1,471,919 Substandard — 161 283 231 885 5,328 3,517 2,041 12,446 Total home equity loans 215,458 211,116 104,044 96,373 88,946 245,190 482,115 41,123 1,484,365 Vehicle loans Pass 339,078 392,873 246,281 81,517 37,416 28,701 — — 1,125,866 Substandard 165 2,008 2,058 1,406 702 635 — — 6,974 Total vehicle loans 339,243 394,881 248,339 82,923 38,118 29,336 — — 1,132,840 Consumer loans Pass 110,146 93,152 39,398 19,837 8,990 13,010 65,388 2,322 352,243 Substandard 108 393 119 137 49 597 565 32 2,000 Total consumer loans 110,254 93,545 39,517 19,974 9,039 13,607 65,953 2,354 354,243 Total Personal Banking 1,198,169 1,160,299 651,139 477,746 370,588 1,665,331 548,068 43,477 6,114,817 Business Banking: Commercial real estate loans Pass 280,895 473,395 336,430 281,719 208,590 751,165 37,879 12,005 2,382,078 Special Mention 637 4,429 14,314 35,233 17,234 8,964 862 856 82,529 Substandard 33,637 1,126 59,756 49,370 20,786 133,612 2,196 2,798 303,281 Total commercial real estate loans 315,169 478,950 410,500 366,322 246,610 893,741 40,937 15,659 2,767,888 Commercial real estate loans - owner occupied Pass 19,864 76,063 97,694 85,894 57,933 122,450 6,905 1,730 468,533 Special Mention — 6,217 5,280 862 3,888 7,740 3,557 — 27,544 Substandard — 18,285 899 13,094 4,063 17,735 1,284 418 55,778 Total commercial real estate loans - owner occupied 19,864 100,565 103,873 99,850 65,884 147,925 11,746 2,148 551,855 Commercial loans Pass 587,698 114,419 65,990 66,647 57,539 52,649 294,346 15,967 1,255,255 Special Mention 5,003 1,228 1,547 2,063 6,300 170 24,320 — 40,631 Substandard 1,411 2,870 3,767 1,154 1,280 7,760 25,353 7,811 51,406 Total commercial loans 594,112 118,517 71,304 69,864 65,119 60,579 344,019 23,778 1,347,292 Total Business Banking 929,145 698,032 585,677 536,036 377,613 1,102,245 396,702 41,585 4,667,035 Total loans $ 2,127,314 1,858,331 1,236,816 1,013,782 748,201 2,767,576 944,770 85,062 10,781,852 For the nine months ended September 30, 2020, $17.2 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): P

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 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 at the dates indicated (in thousands): September 30, 2020 December 31, 2019 Amortizable intangible assets: Core deposit intangibles - gross $ 71,183 71,183 Acquisitions 3,717 — Less: accumulated amortization (55,448) (50,934) Core deposit intangibles - net 19,452 20,249 Customer and Contract intangible assets - gross 12,775 12,775 Less: accumulated amortization (10,626) (9,948) Customer and Contract intangible assets - net 2,149 2,827 Total intangible assets - net $ 21,601 23,076 The following table shows the actual aggregate amortization expense for the quarters ended September 30, 2020 and 2019, as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for the current fiscal year and each of the five succeeding fiscal years (in thousands): For the quarter ended September 30, 2020 $ 1,781 For the quarter ended September 30, 2019 1,702 For the nine months ended September 30, 2020 5,192 For the nine months ended September 30, 2019 4,909 For the year ending December 31, 2020 6,856 For the year ending December 31, 2021 5,902 For the year ending December 31, 2022 4,681 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 (in thousands): Total Balance at December 31, 2018 $ 307,420 Goodwill acquired 38,683 Balance at December 31, 2019 346,103 Goodwill acquired 39,941 Balance at September 30, 2020 $ 386,044 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 September 30, 2020, 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.

Borrowed Funds

Borrowed Funds	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds (a) Borrowings September 30, 2020 Amount Average rate Term notes payable to the Federal Home Loan Bank (FHLB): Payable to FHLB of Pittsburgh $ 30,000 0.40 % Payable to the FHLB of Indianapolis acquired from MutualFirst 118,107 1.70 % Total term notes payable to the FHLB 148,107 Collateralized borrowings, due within one year 126,832 0.19 % Subordinated debentures, net of issuance costs 123,277 4.00 % Total borrowed funds $ 398,216 Borrowings from the FHLB of Pittsburgh 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. The revolving line of credit had no balance as of September 30, 2020 and $153.6 million at December 31, 2019. At September 30, 2020 and December 31, 2019, collateralized borrowings due within one year were $126.8 million and $92.7 million, respectively. These borrowings are collateralized by cash or various securities held in safekeeping by the FHLB. 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 Secured Overnight Financing Rate (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 September 30, 2020. Maturity date Interest rate Trust preferred securities Junior subordinated debentures Northwest Bancorp Capital Trust III December 30, 2035 3-month LIBOR plus 1.38% $ 50,000 $ 51,547 Northwest Bancorp Statutory Trust IV December 15, 2035 3-month LIBOR plus 1.38% 50,000 51,547 LNB Trust II June 15, 2037 3-month LIBOR plus 1.48% 7,875 8,119 Union National Capital Trust I January 23, 2034 3-month LIBOR plus 2.85% 8,000 7,919 Union National Capital Trust II November 23, 2034 3-month LIBOR plus 2.00% 3,000 2,707 MFBC Statutory Trust I September 15, 2035 3-month LIBOR plus 1.70% 5,000 3,450 Universal Preferred Trust October 7, 2035 3-month LIBOR plus 1.69% 5,000 3,440 $ 128,729 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 trusts to become subject to federal income tax or to certain other taxes or governmental charges; • the trusts to register as an investment company; or • the preferred securities to no longer 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.

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2020
Guarantees [Abstract]
Guarantees	Guarantees We issue standby letters of credit in the normal course of business. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party. We are required to perform under a standby letter of credit when drawn upon by the guaranteed third party in the case of nonperformance by our customer. The credit risk associated with standby letters of credit is essentially the same as that involved in extending loans to customers and is subject to normal loan underwriting procedures. Collateral may be obtained based on management’s credit assessment of the customer. At September 30, 2020, the maximum potential amount of future payments we could be required to make under these non-recourse standby letters of credit was $44.1 million, of which $39.7 million is fully collateralized. At September 30, 2020, we had a liability which represents deferred income of $449,000 related to the standby letters of credit.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 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 quarter ended September 30, 2020, 4,828,192 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 $9.88. All stock options outstanding during the quarter ended September 30, 2019 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 $16.69. For the nine months ended September 30, 2020, 4,828,192 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 $11.59. All stock options outstanding during the nine months ended September 30, 2019 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 $17.19. The following table sets forth the computation of basic and diluted EPS (in thousands, except share data and per share amounts): Quarter ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Net income available to common shareholders $ 38,050 33,414 39,789 84,841 Weighted average common shares outstanding 126,855,810 105,517,707 118,088,122 104,626,560 Dilutive potential shares due to effect of stock options — 752,837 — 1,055,055 Total weighted average common shares and dilutive potential shares $ 126,855,810 106,270,544 118,088,122 105,681,615 Basic earnings per share $ 0.30 0.32 0.34 0.81 Diluted earnings per share $ 0.30 0.31 0.34 0.80

Pension and Other Post-Retireme

Pension and Other Post-Retirement Benefits	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Pension and Other Post-Retirement Benefits	Pension and Other Post-Retirement Benefits The following table sets forth the net periodic costs for the defined benefit pension plans and post-retirement healthcare plans for the periods indicated (in thousands): Quarter ended September 30, Pension benefits Other post-retirement benefits 2020 2019 2020 2019 Service cost $ 2,097 1,487 — — Interest cost 1,713 1,839 7 13 Expected return on plan assets (3,090) (2,759) — — Amortization of prior service cost (580) (581) — — Amortization of the net loss 925 856 4 17 Net periodic cost $ 1,065 842 11 30 Nine months ended September 30, Pension benefits Other post-retirement benefits 2020 2019 2020 2019 Service cost $ 6,293 4,462 — — Interest cost 5,141 5,515 20 39 Expected return on plan assets (9,272) (8,278) — — Amortization of prior service cost (1,742) (1,742) — — Amortization of the net loss 2,773 2,568 13 51 Net periodic cost $ 3,193 2,525 33 90

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 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; ◦ 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. 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 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 transferability of FHLB stock, it is not practical to determine the fair value. The fair value presented, therefore, is equal to the carrying amount. 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 collateralized borrowings approximates the fair value. 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 September 30, 2020 and December 31, 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 September 30, 2020 (in thousands): Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 656,749 656,749 656,749 — — Securities available-for-sale 1,409,150 1,409,150 — 1,409,150 — Securities held-to-maturity 15,333 16,168 — 16,168 — Loans receivable, net 10,616,503 10,644,954 — — 10,644,954 Residential mortgage loans held-for-sale 25,140 25,140 — — 25,140 Accrued interest receivable 36,916 36,916 36,916 — — Interest rate lock commitments 8,208 8,208 — — 8,208 Forward commitments 1,059 1,059 — 1,059 — Interest rate swaps not designated as hedging instruments 60,941 60,941 — 60,941 — FHLB stock 23,171 23,171 — — — Total financial assets $ 12,853,170 12,882,456 693,665 1,487,318 10,678,302 Financial liabilities: Savings and checking deposits $ 9,724,597 9,724,597 9,724,597 — — Time deposits 1,732,022 1,762,167 — — 1,762,167 Borrowed funds 398,216 398,246 276,733 121,513 — Junior subordinated debentures 128,729 130,233 — — 130,233 Interest rate swaps not designated as hedging instruments 61,694 61,694 — 61,694 — Risk participation agreements 224 224 — 224 — Accrued interest payable 1,002 1,002 1,002 — — Total financial liabilities $ 12,046,484 12,078,163 10,002,332 183,431 1,892,400 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, 2019 (in thousands): Carrying Estimated 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 accounts $ 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 methods and assumptions detailed above were used in estimating the fair value of financial instruments at both September 30, 2020 and December 31, 2019. The following table represents assets and liabilities measured at fair value on a recurring basis at September 30, 2020 (in thousands): Level 1 Level 2 Level 3 Total assets Debt securities: U.S. government and agencies $ — 34,176 — 34,176 Government sponsored enterprises — 105,399 — 105,399 States and political subdivisions — 114,522 — 114,522 Total debt securities — 254,097 — 254,097 Residential mortgage-backed securities: GNMA — 25,964 — 25,964 FNMA — 212,314 — 212,314 FHLMC — 143,783 — 143,783 Non-agency — 474 — 474 Collateralized mortgage obligations: GNMA — 336,896 — 336,896 FNMA — 250,637 — 250,637 FHLMC — 201,153 — 201,153 Total mortgage-backed securities — 1,171,221 — 1,171,221 Interest rate lock commitments — — 8,208 8,208 Forward commitments — 1,059 — 1,059 Interest rate swaps not designated as hedging instruments — 60,941 — 60,941 Total assets $ — 1,487,318 8,208 1,495,526 Interest rate swaps not designated as hedging instruments $ — 61,694 — 61,694 Risk participation agreements — 224 — 224 Total liabilities $ — 61,918 — 61,918 The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets 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 following table presents the changes in Level 3 assets and liabilities measured at fair value on a recurring basis (in thousands): For the quarter ended September 30, For the nine months ended September 30, 2020 2019 2020 2019 Beginning balance $ 7,416 — 559 — Total gains or losses: Included in net income — — — — Included in other comprehensive income — — — — Interest rate lock commitments: Net activity 792 505 7,649 505 Transfers from Level 3 — — — — Transfers into Level 3 — — — — Ending balance $ 8,208 505 8,208 505 Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans individually assessed, mortgage servicing rights and real estate owned. 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 September 30, 2020 (in thousands): Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 53,277 53,277 Real estate owned, net — — 2,575 2,575 Total assets $ — — 55,852 55,852 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 (in thousands): 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 Individually Assessed Loans - A loan is considered to be individually assessed as described in Note 1 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. These 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 September 30, 2020 (in thousands): Fair value Valuation Significant Range Loans individually assessed $ 53,277 Appraisal value (1) Estimated cost to sell 10.0% Discounted cash flow Discount rate 6.00% to 19.8% (14.24%) Real estate owned, net $ 2,575 Appraisal value (1) Estimated cost to sell 10.0% (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.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 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. 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 current quarter, the Company discontinued these cash flow hedges and, as a result, reclassified a $1.3 million loss into earnings as of September 30, 2020. 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 (in thousands): Asset derivatives Liability derivatives Notional amount Fair value Notional amount Fair value At September 30, 2020 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 553,699 60,941 553,699 61,694 Interest rate lock commitments 196,335 8,208 — — Forward commitments 24,081 1,059 — — Risk participation agreements — — 77,532 224 Total Derivatives $ 774,115 70,208 631,231 61,918 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 presents income or expense recognized on derivatives for the periods indicated (in thousands): For the quarter ended September 30, For the nine months ended September 30, 2020 2019 2020 2019 Hedging derivatives: Increase/(decrease) in interest expense $ 67 — (35) — Non-hedging swap derivatives: Decrease in other income (353) (125) (875) (195) Increase in mortgage banking income 315 720 8,563 720

Legal Proceedings

Legal Proceedings	9 Months Ended
	Sep. 30, 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 September 30, 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 September 30, 2020.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income	Changes in Accumulated Other Comprehensive Income The following tables show the changes in accumulated other comprehensive income by component for the periods indicated (in thousands): For the quarter ended September 30, 2020 Unrealized Change in Change in Total Balance as of June 30, 2020 $ 16,096 (946) (39,590) (24,440) Other comprehensive income before reclassification adjustments (1) 676 — — 676 Amounts reclassified from accumulated other comprehensive income (2) (3) (4) (1) 946 250 1,195 Net other comprehensive income 675 946 250 1,871 Balance as of September 30, 2020 $ 16,771 — (39,340) (22,569) For the quarter ended September 30, 2019 Unrealized Change in Change in Total Balance as of June 30, 2019 $ 3,227 — (32,446) (29,219) Other comprehensive income before reclassification adjustments (5) 1,315 — — 1,315 Amounts reclassified from accumulated other comprehensive income (6) (7) (1) — 208 207 Net other comprehensive income 1,314 — 208 1,522 Balance as of September 30, 2019 $ 4,541 — (32,238) (27,697) (1) Consists of unrealized holding gains, net of tax of $107. (2) Consists of realized gains on securities (gain on sales of investments, net) of $2, net of tax (income tax expense) of $(1). (3) Consists of realized losses on interest rate swaps, net of tax $375. (4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net actuarial loss (compensation and employee benefits) of $(929), net of tax (income tax expense) of $99. (5) Consists of unrealized holding gains, net of tax $525. (6) Consists of realized gains on securities (gain on sales of investments, net) of $(1), net of tax (income tax expense) of $0. (7) Consists of amortization of prior service cost (compensation and employee benefits) of $581 and amortization of net actuarial loss (compensation and employee benefits) of $(871), net of tax (income tax expense) of $83. For the nine months ended September 30, 2020 Unrealized Change in Change in Total Balance as of December 31, 2019 $ 3,147 — (40,088) (36,941) Other comprehensive income before reclassification adjustments (1) (2) 13,623 (946) — 12,677 Amounts reclassified from accumulated other comprehensive income (3) (4) (5) 1 946 748 1,695 Net other comprehensive income 13,624 — 748 14,372 Balance as of September 30, 2020 $ 16,771 — (39,340) (22,569) For the nine months ended September 30, 2019 Unrealized Change in Change in Total Balance as of December 31, 2018 $ (6,832) — (32,864) (39,696) Other comprehensive income before reclassification adjustments (6) 11,376 — — 11,376 Amounts reclassified from accumulated other comprehensive income (7) (8) (3) — 626 623 Net other comprehensive income 11,373 — 626 11,999 Balance as of September 30, 2019 $ 4,541 — (32,238) (27,697) (1) Consists of unrealized holding gains, net of tax of $5,286. (2) Consists of unrealized holding losses, net of tax $(209). (3) Consists of realized gains on securities (gain on sales of investments, net) of $(1), net of tax (income tax expense) of $0. (4) Consists of realized losses on interest rate swaps, net of tax of $375. (5) Consists of amortization of prior service cost (compensation and employee benefits) of $1,741 and amortization of net actuarial loss (compensation and employee benefits) of $(2,786), net of tax (income tax expense) of $297. (6) Consists of unrealized holding gains, net of tax $4,549. (7) Consists of realized gains on securities (gain on sales of investments, net) of $4, net of tax (income tax expense) of $1.

Basis of Presentation and Inf_2

Basis of Presentation and Informational Disclosures (Policies)	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Northwest Bancshares, Inc. (the “Company” or “NWBI”), a Maryland corporation headquartered in Warren, Pennsylvania, is a savings and loan holding company regulated by the Board of Governors of the Federal Reserve System. The primary activity of the Company is the ownership of all of the issued and outstanding common stock of Northwest Bank, a Pennsylvania-chartered savings bank (“Northwest”). Northwest is regulated by the Federal Deposit Insurance Corporation ("FDIC") and the Pennsylvania Department of Banking. Northwest operates 213 community-banking offices throughout Pennsylvania, Western New York, Eastern Ohio, and Indiana. The accompanying unaudited Consolidated Financial Statements include the accounts of the Company and its subsidiary, Northwest, and Northwest’s subsidiaries Northwest Capital Group, Inc., Allegheny Services, Inc., Great Northwest Corporation, The Bert Company (doing business as Northwest Insurance Services) and MutualFirst Investment Company, Inc. The unaudited Consolidated Financial Statements have been prepared in accordance with United States generally accepted accounting principles for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information or footnotes required for complete annual financial statements. In the opinion of management, all adjustments necessary for the fair presentation of the Company’s financial position and results of operations have been included. The Consolidated Financial Statements have been prepared using the accounting policies described in the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 updated, as required, for any new pronouncements or changes.
Income Taxes - Uncertain Tax Positions	Income Taxes-Uncertain Tax Positions Accounting standards prescribe a comprehensive model for how a company should recognize, measure, present and disclose in its financial statements uncertain tax positions that the company has taken or expects to take on a tax return. A tax benefit from an uncertain position may be recognized only if it is “more likely than not” that the position is sustainable, based on its technical merits. The tax benefit of a qualifying position is the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority having full knowledge of all relevant information. At September 30, 2020, we had no liability for unrecognized tax benefits. We recognize interest accrued related to: (1) unrecognized tax benefits in other expenses and (2) refund claims in other operating income. We recognize penalties (if any) in other expenses. We are subject to audit by the Internal Revenue Service and any state in which we conduct business for the tax periods ended December 31, 2019, 2018, and 2017.
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 We also adopted ASC 326 using the prospective transition approach for financial assets Purchased with Credit Deterioration (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. Adoption of this standard resulted to changes in our Investment Securities, Loans Receivable and Allowance for Credit Loss and Provision for Credit Losses accounting policies as presented below. Refer to Note 1 to the Consolidated Financial Statements in our 2019 Annual Report on Form 10-K regarding additional significant accounting policies, including policies in effect prior to the adoption of the CECL standard. Investment 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 quarter ended September 30, 2020. 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 $1.4 million and $1.5 million at September 30, 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 $1.7 million and $900,000 at September 30, 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 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 $33.5 million and $23.3 million at September 30, 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 September 30, 2020. The accrual status of these loans will be re-assessed at the end of their deferral period. 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. At September 30, 2020 and December 31, 2019, there were $25.1 million and $7.7 million of residential mortgage loans classified as held-for-sale, respectively. Acquired loans that are not considered 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. 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 loan-level wherever possible, but it is sometimes measured at the portfolio level when there is no added benefit to being measured at the loan-level. We use a twelve-month forecasting period and revert to historical average loss rates thereafter. Reversion to the mean takes place over a twelve month period. Historical average loss rates are calculated using historical data beginning in 2009 through the current period. Mortgage and Home Equity Loans The allowance for credit losses within the mortgage and home equity loan classes is calculated at the loan-level using a proprietary statistical 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 proprietary statistical 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 losses within the consumer loan portfolio is calculated at the portfolio-level using a suite of proprietary statistical 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 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 loan-level using a proprietary statistical 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 proprietary statistical model. 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 loan-level using a proprietary statistical 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 the 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 proprietary statistical model. 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. 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 10, "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)	9 Months Ended
	Sep. 30, 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 (in thousands): 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 Federal Home Loan Bank stock 13,115 Premises and equipment 19,094 Core deposit intangible 3,717 Other assets 118,025 Deposits (1,617,039) Borrowings (232,200) Junior subordinated debentures (6,804) Other liabilities (21,150) Total identifiable net assets $ 173,465 Goodwill $ 39,941 (1) Amounts are estimates and subject to adjustment. Actual amounts are not expected to differ materially from the amounts shown.

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of the portfolio of investment securities available-for-sale	The following table shows the portfolio of marketable securities available-for-sale at September 30, 2020 (in thousands): Amortized Gross Gross Fair Debt issued by the U.S government and agencies: Due after ten years $ 34,000 176 — 34,176 Debt issued by government sponsored enterprises: Due in less than one year 35,731 284 — 36,015 Due in one year through five years 253 4 — 257 Due in five years through ten years 69,135 170 (178) 69,127 Municipal securities: Due in less than one year 4,241 18 — 4,259 Due in one year through five years 3,343 73 (2) 3,414 Due in five years through ten years 11,077 312 — 11,389 Due after ten years 92,530 2,930 — 95,460 Residential mortgage-backed securities: Fixed rate pass-through 356,898 6,467 (102) 363,263 Variable rate pass-through 15,798 538 (18) 16,318 Fixed rate agency CMOs 710,620 13,035 (722) 722,933 Variable rate agency CMOs 52,209 369 (39) 52,539 Total residential mortgage-backed securities 1,135,525 20,409 (881) 1,155,053 Total marketable securities available-for-sale $ 1,385,835 24,376 (1,061) 1,409,150 The following table shows the portfolio of marketable securities available-for-sale at December 31, 2019 (in thousands): Amortized Gross Gross Fair 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	The following table shows the portfolio of marketable securities held-to-maturity at September 30, 2020 (in thousands): Amortized Gross Gross Fair Residential mortgage-backed securities: Fixed rate pass-through $ 1,823 128 — 1,951 Variable rate pass-through 970 33 — 1,003 Fixed rate agency CMOs 11,936 659 — 12,595 Variable rate agency CMOs 604 15 — 619 Total residential mortgage-backed securities 15,333 835 — 16,168 Total marketable securities held-to-maturity $ 15,333 835 — 16,168 The following table shows the portfolio of marketable securities held-to-maturity at December 31, 2019 (in thousands): Amortized Gross Gross Fair 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 shows the contractual maturity of our marketable securities held-to-maturity at September 30, 2020 (in thousands): Amortized Fair Residential mortgage-backed securities: Due in one year through five years $ 1,256 1,330 Due after ten years 14,077 14,838 Total residential mortgage-backed securities 15,333 16,168 Total marketable securities held-to-maturity $ 15,333 16,168
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 of and gross unrealized losses on available-for-sale marketable 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 September 30, 2020 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized Fair value Unrealized Fair value Unrealized U.S. government sponsored enterprises $ 44,892 (93) 2,081 (85) 46,973 (178) Municipal securities 178 (2) — — 178 (2) Residential mortgage-backed securities - agency 236,675 (845) 6,132 (36) 242,807 (881) Total temporarily impaired securities $ 281,745 (940) 8,213 (121) 289,958 (1,061) The following table shows the fair value of and gross unrealized losses on marketable 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 (in thousands): 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 - agency 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)
Schedule of credit quality of held-to-maturity securities	The following table presents the credit quality of our held-to-maturity securities, based on the latest information available as of September 30, 2020. The credit ratings are sourced from nationally recognized rating agencies, which include 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 September 30, 2020. AA+ Total Held-to-maturity securities: Residential mortgage-backed securities $ 15,333 15,333 Total marketable securities held-to-maturity $ 15,333 15,333

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Summary of loans receivable	The following table shows a summary of our loans receivable at amortized cost basis at September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,794,489 348,880 3,143,369 2,785,189 82,938 2,868,127 Home equity loans 1,169,709 314,656 1,484,365 1,099,514 243,404 1,342,918 Vehicle loans 960,178 172,662 1,132,840 850,804 10,388 861,192 Consumer loans 282,042 72,201 354,243 238,343 25,597 263,940 Total Personal Banking 5,206,418 908,399 6,114,817 4,973,850 362,327 5,336,177 Commercial Banking: Commercial real estate loans 2,123,387 644,501 2,767,888 1,915,949 312,160 2,228,109 Commercial real estate loans - owner occupied 365,580 186,275 551,855 433,099 93,182 526,281 Commercial loans 1,147,492 199,800 1,347,292 664,159 53,948 718,107 Total Commercial Banking 3,636,459 1,030,576 4,667,035 3,013,207 459,290 3,472,497 Total loans receivable, gross 8,842,877 1,938,975 10,781,852 7,987,057 821,617 8,808,674 Allowance for credit losses (109,580) (30,629) (140,209) (51,439) (6,502) (57,941) Total loans receivable, net (2) $ 8,733,297 1,908,346 10,641,643 7,935,618 815,115 8,750,733 (1) Includes $25.1 million and $7.7 million of loans held-for-sale at September 30, 2020 and December 31, 2019, respectively. (2) Includes $34.2 million and $40.2 million of net unearned income, unamortized premiums and discounts and deferred fees and costs at September 30, 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 quarter ended September 30, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of September 30, 2020 Current Charge-offs Recoveries Initial ACL on loans purchased with credit deterioration Balance as of June 30, 2020 Allowance for Credit Losses Personal Banking: Residential mortgage loans $ 12,036 268 (129) 189 — 11,708 Home equity loans 9,585 183 (88) 127 — 9,363 Vehicle loans 16,713 4,111 (1,763) 530 — 13,835 Consumer loans 3,147 1,871 (1,593) 363 — 2,506 Total Personal Banking 41,481 6,433 (3,573) 1,209 — 37,412 Commercial Banking: Commercial real estate loans 73,410 780 (470) 267 — 72,833 Commercial real estate loans - owner occupied 13,570 (1,205) (62) 10 — 14,827 Commercial loans 11,748 810 (4,892) 316 — 15,514 Total Commercial Banking 98,728 385 (5,424) 593 — 103,174 Total $ 140,209 6,818 (8,997) 1,802 — 140,586 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 3 3 — — — — Home equity loans 40 2 — — — 38 Total Personal Banking 43 5 — — — 38 Commercial Banking: Commercial real estate loans 2,423 (2,712) — — — 5,135 Commercial real estate loans - owner occupied 469 (157) — — — 626 Commercial loans 3,312 (1,072) — — — 4,384 Total Commercial Banking 6,204 (3,941) — — — 10,145 Total off-balance sheet exposure $ 6,247 (3,936) — — — 10,183 . The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the quarter ended September 30, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of September 30, 2019 Current Charge-offs Recoveries Balance as of June 30, 2019 Originated loans Personal Banking: Residential mortgage loans $ 2,507 (1,361) (109) 68 3,909 Home equity loans 2,791 (81) (176) 58 2,990 Consumer loans 12,175 3,779 (2,975) 605 10,766 Total Personal Banking 17,473 2,337 (3,260) 731 17,665 Commercial Banking: Commercial real estate loans 20,215 (1,206) (261) 720 20,962 Commercial loans 9,729 958 (1,118) 87 9,802 Total Commercial Banking 29,944 (248) (1,379) 807 30,764 Total originated loans 47,417 2,089 (4,639) 1,538 48,429 Acquired loans Personal Banking: Residential mortgage loans 92 41 (81) 28 104 Home equity loans 295 220 (290) 21 344 Consumer loans 554 63 (103) 83 511 Total Personal Banking 941 324 (474) 132 959 Commercial Banking: Commercial real estate loans 3,622 1,155 (128) 24 2,571 Commercial loans 879 (266) (33) 30 1,148 Total Commercial Banking 4,501 889 (161) 54 3,719 Total acquired loans 5,442 1,213 (635) 186 4,678 Total $ 52,859 3,302 (5,274) 1,724 53,107 The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2020 and includes the cumulative effect of adopting ASU 2016-13 (in thousands): Balance as of September 30, 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 $ 12,036 1,132 (510) 304 1,095 7,441 2,574 Home equity loans 9,585 536 (550) 408 216 5,786 3,189 Vehicle loans 16,713 12,419 (5,369) 1,294 235 842 7,292 Consumer loans 3,147 3,600 (4,666) 1,179 157 (2,424) 5,301 Total Personal Banking 41,481 17,687 (11,095) 3,185 1,703 11,645 18,356 Commercial Banking: Commercial real estate loans 73,410 50,018 (1,470) 1,011 5,720 2,288 15,843 Commercial real estate loans - owner occupied 13,570 5,642 (83) 25 963 1,278 5,745 Commercial loans 11,748 12,858 (16,056) 909 459 (4,419) 17,997 Total Commercial Banking 98,728 68,518 (17,609) 1,945 7,142 (853) 39,585 Total $ 140,209 86,205 (28,704) 5,130 8,845 10,792 57,941 Allowance for Credit Losses - Personal Banking: Residential mortgage loans $ 3 3 — — — — — Home equity loans 40 10 — — — (293) 323 Consumer loans — — — — — (402) 402 Total Personal Banking 43 13 — — — (695) 725 Commercial Banking: Commercial real estate loans 2,423 412 — — — 1,934 77 Commercial real estate loans - owner occupied 469 378 — — — 88 3 Commercial loans 3,312 2,220 — — — 923 169 Total Commercial Banking 6,204 3,010 — — — 2,945 249 Total off-balance sheet exposure $ 6,247 3,023 — — — 2,250 974 * Includes the impact of the initial allowance on PCD loans of $517,000. During the nine months ended September 30, 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. No loans were sold during the three months ended September 30, 2020. The following table provides information related to the allowance for credit losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2019, prior to the adoption of ASU 2016-13 (in thousands): Balance as of September 30, 2019 Current Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 2,507 (991) (847) 291 4,054 Home equity loans 2,791 36 (536) 107 3,184 Consumer loans 12,175 7,737 (8,492) 1,850 11,080 Total Personal Banking 17,473 6,782 (9,875) 2,248 18,318 Commercial Banking: Commercial real estate loans 20,215 (2,177) (4,978) 991 26,379 Commercial loans 9,729 4,769 (2,449) 355 7,054 Total Commercial Banking 29,944 2,592 (7,427) 1,346 33,433 Total originated loans 47,417 9,374 (17,302) 3,594 51,751 Acquired loans Personal Banking: Residential mortgage loans 92 50 (97) 56 83 Home equity loans 295 249 (472) 170 348 Consumer loans 554 131 (173) 177 419 Total Personal Banking 941 430 (742) 403 850 Commercial Banking: Commercial real estate loans 3,622 1,432 (382) 576 1,996 Commercial loans 879 3,200 (3,059) 121 617 Total Commercial Banking 4,501 4,632 (3,441) 697 2,613 Total acquired loans 5,442 5,062 (4,183) 1,100 3,463 Total $ 52,859 14,436 (21,485) 4,694 55,214
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 September 30, 2020 (in thousands): Total loans Allowance for Nonaccrual Loans 90 days past due and accruing TDRs Allowance Additional Personal Banking: Residential mortgage loans $ 3,143,369 12,036 16,514 — 8,464 891 — Home equity loans 1,484,365 9,585 9,274 — 2,090 578 26 Vehicle loans 1,132,840 16,713 5,659 — — — — Consumer loans 354,243 3,147 938 495 1 — — Total Personal Banking 6,114,817 41,481 32,385 495 10,555 1,469 26 Commercial Banking: Commercial real estate loans 2,767,888 73,410 57,794 — 18,599 1,625 71 Commercial real estate loans - owner occupied 551,855 13,570 3,749 — 920 186 349 Commercial loans 1,347,292 11,748 12,870 — 4,730 195 236 Total Commercial Banking 4,667,035 98,728 74,413 — 24,249 2,006 656 Total $ 10,781,852 140,209 106,798 495 34,804 3,475 682 (1) Includes $17.1 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 nine months ended September 30, 2020 (in thousands): Nonaccrual loans at January 1, 2020 Nonaccrual loans at September 30, 2020 with an allowance Nonaccrual loans with no allowance Loans 90 days past due and accruing Personal Banking: Residential mortgage loans $ 14,476 16,514 — — Home equity loans 6,745 8,818 456 — Vehicle loans 3,147 5,562 97 — Consumer loans 1,079 927 11 495 Total Personal Banking 25,447 31,821 564 495 Commercial Banking: Commercial real estate loans 18,832 40,123 17,671 — Commercial real estate loans - owner occupied 16,032 3,748 1 — Commercial loans 8,559 8,790 4,080 — Total Commercial Banking 43,423 52,661 21,752 — Total $ 68,870 84,482 22,316 495 During the three and nine months ended September 30, 2020, we recognized $186,000 and $574,000 of interest income on nonaccrual loans. The following table presents the amortized cost basis of collateral-dependent loans by class of loans as of September 30, 2020 (in thousands): Real estate Equipment Other Total Personal Banking: Residential mortgage loans $ 1,338 — — 1,338 Home equity loans 100 — — 100 Total Personal Banking 1,438 — — 1,438 Commercial Banking: Commercial real estate loans 32,390 — 2,080 34,470 Commercial loans 4,280 2,003 1,575 7,858 Total Commercial Banking 36,670 2,003 3,655 42,328 Total $ 38,108 2,003 3,655 43,766 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 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
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, 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
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 quarter ended September 30, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 167 $ 35,450 183 $ 31,269 New TDRs 7 803 3 520 Re-modified TDRs 3 6,679 8 4,773 Net paydowns — (8,127) — (5,668) Charge-offs: Residential mortgage loans — — — — Home equity loans — — — — Vehicle loans — — — — Commercial real estate loans — — — — Commercial real estate loans - owner occupied — — — — Commercial loans — — 2 (235) Paid-off loans: Residential mortgage loans — — — — Home equity loans — — 3 (68) Vehicle loans — — — — Commercial real estate loans — — 3 (289) Commercial real estate loans - owner occupied — — — — Commercial loans 1 (1) 1 (2) Ending TDR balance: 173 $ 34,804 177 $ 30,300 Accruing TDRs $ 17,684 $ 21,162 Nonaccrual TDRs 17,120 9,138 For the nine months ended September 30, 2020 2019 Number of Amount Number of Amount Beginning TDR balance: 176 $ 31,999 195 $ 33,608 New TDRs 10 889 5 826 Re-modified TDRs 5 9,720 8 4,773 Net paydowns — (7,192) — (6,454) 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) 4 (180) Home equity loans 2 (3) 7 (143) Vehicle loans — — — — Commercial real estate loans 1 (26) 9 (1,893) Commercial real estate loans - owner occupied 1 (25) — — Commercial loans 6 (218) 1 (2) Ending TDR balance: 173 $ 34,804 177 $ 30,300 Accruing TDRs $ 17,684 $ 21,162 Nonaccrual TDRs 17,120 9,138 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 quarter ended September 30, 2020 For the nine months ended September 30, 2020 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 90 89 1 1 $ 90 89 1 Home equity loans — — — — 2 86 81 14 Vehicle loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking 1 90 89 1 3 176 170 15 Commercial Banking: Commercial real estate loans 5 7,096 7,040 816 5 7,096 7,040 816 Commercial real estate loans - owner occupied — — — — 1 58 51 10 Commercial loans 4 444 353 — 5 2,944 2,354 2 Total Commercial Banking 9 7,540 7,393 816 11 10,098 9,445 828 Total 10 $ 7,630 7,482 817 14 $ 10,274 9,615 843 For the quarter ended September 30, 2019 For the nine months ended September 30, 2019 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans 1 $ 121 121 8 1 $ 121 121 8 Home equity loans 1 12 11 2 1 12 11 2 Vehicle loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking 2 133 132 10 2 133 132 10 Commercial Banking: Commercial real estate loans 8 6,014 5,120 549 9 6,314 5,417 581 Commercial real estate loans - owner occupied — — — — — — — — Commercial loans 1 55 41 4 2 65 50 5 Total Commercial Banking 9 6,069 5,161 553 11 6,379 5,467 586 Total 11 $ 6,202 5,293 563 13 $ 6,512 5,599 596 The following table provides information as of September 30, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended September 30, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 89 — 89 Home equity loans — — — — — — Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 1 — — 89 — 89 Commercial Banking: Commercial real estate loans 5 — — 6,755 285 7,040 Commercial real estate loans - owner occupied — — — — — — Commercial loans 4 — 114 239 — 353 Total Commercial Banking 9 — 114 6,994 285 7,393 Total 10 $ — 114 7,083 285 7,482 The following table provides information as of September 30, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended September 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 121 — 121 Home equity loans 1 — — 11 — 11 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 2 — — 132 — 132 Commercial Banking: Commercial real estate loans 8 — 222 4,898 — 5,120 Commercial real estate loans - owner occupied — — — — — — Commercial loans 1 — — 41 — 41 Total Commercial Banking 9 — 222 4,939 — 5,161 Total 11 $ — 222 5,071 — 5,293 The following table provides information as of September 30, 2020 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2020 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 89 — 89 Home equity loans 2 66 — 15 — 81 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 3 66 — 104 — 170 Commercial Banking: Commercial real estate loans 5 — — 6,755 285 7,040 Commercial real estate loans - owner occupied 1 — — 51 — 51 Commercial loans 5 — 114 239 2,001 2,354 Total Commercial Banking 11 — 114 7,045 2,286 9,445 Total 14 $ 66 114 7,149 2,286 9,615 The following table provides information as of September 30, 2019 for TDRs (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 1 $ — — 121 — 121 Home equity loans 1 — — 11 — 11 Vehicle loans — — — — — — Consumer loans — — — — — — Total Personal Banking 2 — — 132 — 132 Commercial Banking: Commercial real estate loans 9 — 519 4,898 — 5,417 Commercial real estate loans - owner occupied — — — — — — Commercial loans 2 — — 50 — 50 Total Commercial Banking 11 — 519 4,948 — 5,467 Total 13 $ — 519 5,080 — 5,599 The following table provides information related to troubled debt restructurings modified within the previous twelve months of September 30, 2019 that subsequently defaulted: For the quarter ended September 30, 2019 For the nine months ended September 30, 2019 Number of contracts Recorded Current Current Number of Recorded Current Current Personal Banking: Residential mortgage loans — $ — — — — $ — — — Home equity loans — — — — — — — — Other consumer loans — — — — — — — — Total Personal Banking — — — — — — — — Business Banking: Commercial real estate loans — — — — 2 2,785 2,775 5 Commercial loans 1 134 126 104 2 284 276 104 Total Business Banking 1 134 126 104 4 3,069 3,051 109 Total 1 $ 134 126 104 4 $ 3,069 3,051 109
Schedule of loan delinquencies	The following table provides information related to the amortized cost basis of loan payment delinquencies at September 30, 2020 (in thousands): 30-59 days 60-89 days 90 days or Total Current Total loans 90 days or Personal Banking: Residential mortgage loans $ 736 4,788 14,750 20,274 3,123,095 3,143,369 — Home equity loans 4,984 1,860 7,845 14,689 1,469,676 1,484,365 — Vehicle loans 5,980 2,281 4,530 12,791 1,120,048 1,132,839 — Consumer loans 2,606 768 1,317 4,691 349,553 354,244 495 Total Personal Banking 14,306 9,697 28,442 52,445 6,062,372 6,114,817 495 Commercial Banking: Commercial real estate loans 3,463 4,212 33,509 41,184 2,726,704 2,767,888 — Commercial real estate loans - owner occupied 1,627 — 1,987 3,614 548,241 551,855 — Commercial loans 1,797 357 6,310 8,464 1,338,828 1,347,292 — Total Commercial Banking 6,887 4,569 41,806 53,262 4,613,773 4,667,035 — Total loans $ 21,193 14,266 70,248 105,707 10,676,145 10,781,852 495 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 1,088,136 1,100,023 — Consumer loans 8,969 3,198 3,467 15,634 1,073,103 1,088,638 — 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	as of September 30, 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 $ 533,214 460,757 258,525 277,416 233,974 1,353,556 — — 3,117,442 Substandard — — 714 1,060 511 23,642 — — 25,927 Total residential mortgage loans 533,214 460,757 259,239 278,476 234,485 1,377,198 — — 3,143,369 Home equity loans Pass 215,458 210,955 103,761 96,142 88,061 239,862 478,598 39,082 1,471,919 Substandard — 161 283 231 885 5,328 3,517 2,041 12,446 Total home equity loans 215,458 211,116 104,044 96,373 88,946 245,190 482,115 41,123 1,484,365 Vehicle loans Pass 339,078 392,873 246,281 81,517 37,416 28,701 — — 1,125,866 Substandard 165 2,008 2,058 1,406 702 635 — — 6,974 Total vehicle loans 339,243 394,881 248,339 82,923 38,118 29,336 — — 1,132,840 Consumer loans Pass 110,146 93,152 39,398 19,837 8,990 13,010 65,388 2,322 352,243 Substandard 108 393 119 137 49 597 565 32 2,000 Total consumer loans 110,254 93,545 39,517 19,974 9,039 13,607 65,953 2,354 354,243 Total Personal Banking 1,198,169 1,160,299 651,139 477,746 370,588 1,665,331 548,068 43,477 6,114,817 Business Banking: Commercial real estate loans Pass 280,895 473,395 336,430 281,719 208,590 751,165 37,879 12,005 2,382,078 Special Mention 637 4,429 14,314 35,233 17,234 8,964 862 856 82,529 Substandard 33,637 1,126 59,756 49,370 20,786 133,612 2,196 2,798 303,281 Total commercial real estate loans 315,169 478,950 410,500 366,322 246,610 893,741 40,937 15,659 2,767,888 Commercial real estate loans - owner occupied Pass 19,864 76,063 97,694 85,894 57,933 122,450 6,905 1,730 468,533 Special Mention — 6,217 5,280 862 3,888 7,740 3,557 — 27,544 Substandard — 18,285 899 13,094 4,063 17,735 1,284 418 55,778 Total commercial real estate loans - owner occupied 19,864 100,565 103,873 99,850 65,884 147,925 11,746 2,148 551,855 Commercial loans Pass 587,698 114,419 65,990 66,647 57,539 52,649 294,346 15,967 1,255,255 Special Mention 5,003 1,228 1,547 2,063 6,300 170 24,320 — 40,631 Substandard 1,411 2,870 3,767 1,154 1,280 7,760 25,353 7,811 51,406 Total commercial loans 594,112 118,517 71,304 69,864 65,119 60,579 344,019 23,778 1,347,292 Total Business Banking 929,145 698,032 585,677 536,036 377,613 1,102,245 396,702 41,585 4,667,035 Total loans $ 2,127,314 1,858,331 1,236,816 1,013,782 748,201 2,767,576 944,770 85,062 10,781,852 For the nine months ended September 30, 2020, $17.2 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 — — 8,808,674
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

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 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 at the dates indicated (in thousands): September 30, 2020 December 31, 2019 Amortizable intangible assets: Core deposit intangibles - gross $ 71,183 71,183 Acquisitions 3,717 — Less: accumulated amortization (55,448) (50,934) Core deposit intangibles - net 19,452 20,249 Customer and Contract intangible assets - gross 12,775 12,775 Less: accumulated amortization (10,626) (9,948) Customer and Contract intangible assets - net 2,149 2,827 Total intangible assets - net $ 21,601 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 table shows the actual aggregate amortization expense for the quarters ended September 30, 2020 and 2019, as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for the current fiscal year and each of the five succeeding fiscal years (in thousands): For the quarter ended September 30, 2020 $ 1,781 For the quarter ended September 30, 2019 1,702 For the nine months ended September 30, 2020 5,192 For the nine months ended September 30, 2019 4,909 For the year ending December 31, 2020 6,856 For the year ending December 31, 2021 5,902 For the year ending December 31, 2022 4,681 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 (in thousands): Total Balance at December 31, 2018 $ 307,420 Goodwill acquired 38,683 Balance at December 31, 2019 346,103 Goodwill acquired 39,941 Balance at September 30, 2020 $ 386,044

Borrowed Funds (Tables)

Borrowed Funds (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of borrowed funds	Borrowings September 30, 2020 Amount Average rate Term notes payable to the Federal Home Loan Bank (FHLB): Payable to FHLB of Pittsburgh $ 30,000 0.40 % Payable to the FHLB of Indianapolis acquired from MutualFirst 118,107 1.70 % Total term notes payable to the FHLB 148,107 Collateralized borrowings, due within one year 126,832 0.19 % Subordinated debentures, net of issuance costs 123,277 4.00 % Total borrowed funds $ 398,216
Debt securities held-to-maturity on preferred securities and junior subordinated debt held by the trust	The following table sets forth a summary of the cumulative trust preferred securities and the junior subordinated debt held by the Trust as of September 30, 2020. Maturity date Interest rate Trust preferred securities Junior subordinated debentures Northwest Bancorp Capital Trust III December 30, 2035 3-month LIBOR plus 1.38% $ 50,000 $ 51,547 Northwest Bancorp Statutory Trust IV December 15, 2035 3-month LIBOR plus 1.38% 50,000 51,547 LNB Trust II June 15, 2037 3-month LIBOR plus 1.48% 7,875 8,119 Union National Capital Trust I January 23, 2034 3-month LIBOR plus 2.85% 8,000 7,919 Union National Capital Trust II November 23, 2034 3-month LIBOR plus 2.00% 3,000 2,707 MFBC Statutory Trust I September 15, 2035 3-month LIBOR plus 1.70% 5,000 3,450 Universal Preferred Trust October 7, 2035 3-month LIBOR plus 1.69% 5,000 3,440 $ 128,729

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of earnings per share	The following table sets forth the computation of basic and diluted EPS (in thousands, except share data and per share amounts): Quarter ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Net income available to common shareholders $ 38,050 33,414 39,789 84,841 Weighted average common shares outstanding 126,855,810 105,517,707 118,088,122 104,626,560 Dilutive potential shares due to effect of stock options — 752,837 — 1,055,055 Total weighted average common shares and dilutive potential shares $ 126,855,810 106,270,544 118,088,122 105,681,615 Basic earnings per share $ 0.30 0.32 0.34 0.81 Diluted earnings per share $ 0.30 0.31 0.34 0.80

Pension and Other Post-Retire_2

Pension and Other Post-Retirement Benefits (Tables)	9 Months Ended
	Sep. 30, 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 costs for the defined benefit pension plans and post-retirement healthcare plans for the periods indicated (in thousands): Quarter ended September 30, Pension benefits Other post-retirement benefits 2020 2019 2020 2019 Service cost $ 2,097 1,487 — — Interest cost 1,713 1,839 7 13 Expected return on plan assets (3,090) (2,759) — — Amortization of prior service cost (580) (581) — — Amortization of the net loss 925 856 4 17 Net periodic cost $ 1,065 842 11 30 Nine months ended September 30, Pension benefits Other post-retirement benefits 2020 2019 2020 2019 Service cost $ 6,293 4,462 — — Interest cost 5,141 5,515 20 39 Expected return on plan assets (9,272) (8,278) — — Amortization of prior service cost (1,742) (1,742) — — Amortization of the net loss 2,773 2,568 13 51 Net periodic cost $ 3,193 2,525 33 90

Disclosures About Fair Value _2

Disclosures About Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2020 (in thousands): Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 656,749 656,749 656,749 — — Securities available-for-sale 1,409,150 1,409,150 — 1,409,150 — Securities held-to-maturity 15,333 16,168 — 16,168 — Loans receivable, net 10,616,503 10,644,954 — — 10,644,954 Residential mortgage loans held-for-sale 25,140 25,140 — — 25,140 Accrued interest receivable 36,916 36,916 36,916 — — Interest rate lock commitments 8,208 8,208 — — 8,208 Forward commitments 1,059 1,059 — 1,059 — Interest rate swaps not designated as hedging instruments 60,941 60,941 — 60,941 — FHLB stock 23,171 23,171 — — — Total financial assets $ 12,853,170 12,882,456 693,665 1,487,318 10,678,302 Financial liabilities: Savings and checking deposits $ 9,724,597 9,724,597 9,724,597 — — Time deposits 1,732,022 1,762,167 — — 1,762,167 Borrowed funds 398,216 398,246 276,733 121,513 — Junior subordinated debentures 128,729 130,233 — — 130,233 Interest rate swaps not designated as hedging instruments 61,694 61,694 — 61,694 — Risk participation agreements 224 224 — 224 — Accrued interest payable 1,002 1,002 1,002 — — Total financial liabilities $ 12,046,484 12,078,163 10,002,332 183,431 1,892,400 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, 2019 (in thousands): Carrying Estimated 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 accounts $ 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 at September 30, 2020 (in thousands): Level 1 Level 2 Level 3 Total assets Debt securities: U.S. government and agencies $ — 34,176 — 34,176 Government sponsored enterprises — 105,399 — 105,399 States and political subdivisions — 114,522 — 114,522 Total debt securities — 254,097 — 254,097 Residential mortgage-backed securities: GNMA — 25,964 — 25,964 FNMA — 212,314 — 212,314 FHLMC — 143,783 — 143,783 Non-agency — 474 — 474 Collateralized mortgage obligations: GNMA — 336,896 — 336,896 FNMA — 250,637 — 250,637 FHLMC — 201,153 — 201,153 Total mortgage-backed securities — 1,171,221 — 1,171,221 Interest rate lock commitments — — 8,208 8,208 Forward commitments — 1,059 — 1,059 Interest rate swaps not designated as hedging instruments — 60,941 — 60,941 Total assets $ — 1,487,318 8,208 1,495,526 Interest rate swaps not designated as hedging instruments $ — 61,694 — 61,694 Risk participation agreements — 224 — 224 Total liabilities $ — 61,918 — 61,918 The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets 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 changes in Level 3 assets and liabilities measured at fair value on a recurring basis	The following table presents the changes in Level 3 assets and liabilities measured at fair value on a recurring basis (in thousands): For the quarter ended September 30, For the nine months ended September 30, 2020 2019 2020 2019 Beginning balance $ 7,416 — 559 — Total gains or losses: Included in net income — — — — Included in other comprehensive income — — — — Interest rate lock commitments: Net activity 792 505 7,649 505 Transfers from Level 3 — — — — Transfers into Level 3 — — — — Ending balance $ 8,208 505 8,208 505
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 September 30, 2020 (in thousands): Level 1 Level 2 Level 3 Total assets Loans individually assessed $ — — 53,277 53,277 Real estate owned, net — — 2,575 2,575 Total assets $ — — 55,852 55,852 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 (in thousands): 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 September 30, 2020 (in thousands): Fair value Valuation Significant Range Loans individually assessed $ 53,277 Appraisal value (1) Estimated cost to sell 10.0% Discounted cash flow Discount rate 6.00% to 19.8% (14.24%) Real estate owned, net $ 2,575 Appraisal value (1) Estimated cost to sell 10.0% (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.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivatives not designated as hedging instruments	The following table presents information regarding our derivative financial instruments for the periods indicated (in thousands): Asset derivatives Liability derivatives Notional amount Fair value Notional amount Fair value At September 30, 2020 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 553,699 60,941 553,699 61,694 Interest rate lock commitments 196,335 8,208 — — Forward commitments 24,081 1,059 — — Risk participation agreements — — 77,532 224 Total Derivatives $ 774,115 70,208 631,231 61,918 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
Schedule of derivative instruments gain (loss)	The following table presents income or expense recognized on derivatives for the periods indicated (in thousands): For the quarter ended September 30, For the nine months ended September 30, 2020 2019 2020 2019 Hedging derivatives: Increase/(decrease) in interest expense $ 67 — (35) — Non-hedging swap derivatives: Decrease in other income (353) (125) (875) (195) Increase in mortgage banking income 315 720 8,563 720

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of changes in accumulated other comprehensive income by component	The following tables show the changes in accumulated other comprehensive income by component for the periods indicated (in thousands): For the quarter ended September 30, 2020 Unrealized Change in Change in Total Balance as of June 30, 2020 $ 16,096 (946) (39,590) (24,440) Other comprehensive income before reclassification adjustments (1) 676 — — 676 Amounts reclassified from accumulated other comprehensive income (2) (3) (4) (1) 946 250 1,195 Net other comprehensive income 675 946 250 1,871 Balance as of September 30, 2020 $ 16,771 — (39,340) (22,569) For the quarter ended September 30, 2019 Unrealized Change in Change in Total Balance as of June 30, 2019 $ 3,227 — (32,446) (29,219) Other comprehensive income before reclassification adjustments (5) 1,315 — — 1,315 Amounts reclassified from accumulated other comprehensive income (6) (7) (1) — 208 207 Net other comprehensive income 1,314 — 208 1,522 Balance as of September 30, 2019 $ 4,541 — (32,238) (27,697) (1) Consists of unrealized holding gains, net of tax of $107. (2) Consists of realized gains on securities (gain on sales of investments, net) of $2, net of tax (income tax expense) of $(1). (3) Consists of realized losses on interest rate swaps, net of tax $375. (4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net actuarial loss (compensation and employee benefits) of $(929), net of tax (income tax expense) of $99. (5) Consists of unrealized holding gains, net of tax $525. (6) Consists of realized gains on securities (gain on sales of investments, net) of $(1), net of tax (income tax expense) of $0. (7) Consists of amortization of prior service cost (compensation and employee benefits) of $581 and amortization of net actuarial loss (compensation and employee benefits) of $(871), net of tax (income tax expense) of $83. For the nine months ended September 30, 2020 Unrealized Change in Change in Total Balance as of December 31, 2019 $ 3,147 — (40,088) (36,941) Other comprehensive income before reclassification adjustments (1) (2) 13,623 (946) — 12,677 Amounts reclassified from accumulated other comprehensive income (3) (4) (5) 1 946 748 1,695 Net other comprehensive income 13,624 — 748 14,372 Balance as of September 30, 2020 $ 16,771 — (39,340) (22,569) For the nine months ended September 30, 2019 Unrealized Change in Change in Total Balance as of December 31, 2018 $ (6,832) — (32,864) (39,696) Other comprehensive income before reclassification adjustments (6) 11,376 — — 11,376 Amounts reclassified from accumulated other comprehensive income (7) (8) (3) — 626 623 Net other comprehensive income 11,373 — 626 11,999 Balance as of September 30, 2019 $ 4,541 — (32,238) (27,697) (1) Consists of unrealized holding gains, net of tax of $5,286. (2) Consists of unrealized holding losses, net of tax $(209). (3) Consists of realized gains on securities (gain on sales of investments, net) of $(1), net of tax (income tax expense) of $0. (4) Consists of realized losses on interest rate swaps, net of tax of $375. (5) Consists of amortization of prior service cost (compensation and employee benefits) of $1,741 and amortization of net actuarial loss (compensation and employee benefits) of $(2,786), net of tax (income tax expense) of $297. (6) Consists of unrealized holding gains, net of tax $4,549. (7) Consists of realized gains on securities (gain on sales of investments, net) of $4, net of tax (income tax expense) of $1.

Basis of Presentation and Inf_3

Basis of Presentation and Informational Disclosures (Details)	May 20, 2020$ / sharesshares	Jan. 01, 2020USD ($)	Sep. 30, 2020USD ($)bank	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)segmentbank	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Stock Related Compensation
Number of banking locations | bank			213		213
Options exercise price (in dollars per share) | $ / shares	$ 9.71
Options weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.13
Stock-based compensation expense			$ 743,000	$ 1,700,000	$ 3,800,000	$ 5,400,000
Unrecognized tax benefits liability			0		$ 0
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member			us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Allowance for loan losses			140,209,000	52,859,000	$ 140,209,000	52,859,000	$ 57,941,000	$ 55,214,000	$ 140,586,000	$ 53,107,000
Retained earnings			544,695,000		544,695,000		583,407,000
Accrued interest receivable on held-to-maturity debt securities			1,400,000		1,400,000		1,500,000
Accrued interest receivable on available-for-sale debt securities			1,700,000		1,700,000		900,000
Accrued Interest receivable on loans			33,500,000		33,500,000		23,300,000
Loans held-for-sale			25,140,000		$ 25,140,000		7,709,000
Number of loan segments | segment					7
COVID-19
Stock Related Compensation
Deferral period					6 months
Accrued Interest received			4,400,000		$ 4,400,000
Acquired
Stock Related Compensation
Allowance for loan losses			30,629,000	$ 5,442,000	30,629,000	$ 5,442,000	6,502,000	$ 3,463,000		$ 4,678,000
Cumulative Effect, Period of Adoption, Adjustment
Stock Related Compensation
Allowance for loan losses		$ 10,800,000					$ 10,792,000
Reserve for off-balance sheet exposures		2,300,000
Deferred tax assets		2,900,000
Retained earnings		$ 9,600,000
Deferral period		2 years
Phase in of impact of adoption, percent		25.00%
Cumulative Effect, Period of Adoption, Adjustment | January 1, 2022
Stock Related Compensation
Phase in of impact of adoption, percent		25.00%
Cumulative Effect, Period of Adoption, Adjustment | Each Subsequent Year Beginning January 1, 2023
Stock Related Compensation
Phase in of impact of adoption, percent		25.00%
Cumulative Effect, Period of Adoption, Adjustment | Acquired
Stock Related Compensation
Allowance for loan losses		$ 517,000
Employee Stock Option
Stock Related Compensation
Award vesting period	7 years
Compensation expense yet to be recognized			2,500,000		2,500,000
Common stock
Stock Related Compensation
Compensation expense yet to be recognized			$ 12,700,000		$ 12,700,000
Restricted Stock
Stock Related Compensation
Restricted common shares weighted average grant date fair value (in dollars per share) | $ / shares	$ 9.71
Employees
Stock Related Compensation
Options granted (in shares) | shares	556,476
Employees | Restricted Stock
Stock Related Compensation
Restricted common shares granted (in shares) | shares	261,091
Director
Stock Related Compensation
Options granted (in shares) | shares	57,600
Director | Restricted Stock
Stock Related Compensation
Restricted common shares granted (in shares) | shares	21,600

Acquisition - Narrative (Detail

Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands	Apr. 24, 2020USD ($)office$ / sharesshares	Sep. 30, 2020USD ($)
Acquisition
Fair value of loans acquired, discount	$ 14,700
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
Cash in lieu of fractional shares, share price (in dollars per share) | $ / shares	$ 10.71
Fair value of loans acquired, 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	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value
Goodwill		$ 386,044	$ 346,103	$ 307,420
Mutual first financial, Inc.
Consideration paid:
Northwest Bancshares, Inc. common stock issued	$ 213,406
Total consideration	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
Federal Home Loan Bank stock	13,115
Premises and equipment	19,094
Core deposit intangible	3,717
Other assets	118,025
Deposits	(1,617,039)
Borrowings	(232,200)
Junior subordinated debentures	(6,804)
Other liabilities	(21,150)
Total identifiable net assets	173,465
Goodwill	$ 39,941

Marketable Securities - Availab

Marketable Securities - Available For Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized cost
Residential mortgage-backed securities	$ 1,385,835	$ 815,495
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	24,376	7,351
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,061)	(2,945)
Fair value
Securities available-for-sale	1,409,150	819,901
U.S. government and agencies
Amortized cost
Due in less than one year		14,951
Due after ten years	34,000
Gross unrealized holding gains
Due in less than one year		40
Due after ten years	176
Gross unrealized holding losses
Due in less than one year		0
Due after ten years	0
Fair value
Due in less than one year		14,991
Due after ten years	34,176
Debt issued by government sponsored enterprises
Amortized cost
Due in less than one year	35,731	50,777
Due in one year through five years	253	50,229
Due in five years through ten years	69,135
Due after ten years		3,716
Gross unrealized holding gains
Due in less than one year	284	345
Due in one year through five years	4	0
Due in five years through ten years	170
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	(178)
Due after ten years		(109)
Fair value
Due in less than one year	36,015	51,122
Due in one year through five years	257	50,002
Due in five years through ten years	69,127
Due after ten years		3,660
Municipal securities
Amortized cost
Due in less than one year	4,241	809
Due in one year through five years	3,343	2,891
Due in five years through ten years	11,077	10,155
Due after ten years	92,530	11,695
Gross unrealized holding gains
Due in less than one year	18	4
Due in one year through five years	73	79
Due in five years through ten years	312	148
Due after ten years	2,930	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	0	0
Due after ten years	0	0
Fair value
Due in less than one year	4,259	813
Due in one year through five years	3,414	2,970
Due in five years through ten years	11,389	10,303
Due after ten years	95,460	11,962
Corporate debt issues
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	1,135,525	669,353
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	20,409	6,415
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(881)	(2,609)
Fair value
Securities available-for-sale	1,155,053	673,159
Fixed rate | Pass-through
Amortized cost
Residential mortgage-backed securities	356,898	142,421
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	6,467	1,941
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(102)	(881)
Fair value
Securities available-for-sale	363,263	143,481
Fixed rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	710,620	452,256
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	13,035	3,518
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(722)	(1,606)
Fair value
Securities available-for-sale	722,933	454,168
Variable rate | Pass-through
Amortized cost
Residential mortgage-backed securities	15,798	18,933
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	538	749
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(18)	(4)
Fair value
Securities available-for-sale	16,318	19,678
Variable rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	52,209	55,743
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	369	207
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(39)	(118)
Fair value
Securities available-for-sale	$ 52,539	$ 55,832

Marketable Securities - Held To

Marketable Securities - Held To Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized cost
Marketable securities held-to-maturity, amortized cost	$ 15,333	$ 18,036
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	835	187
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	16,168	18,223
Residential mortgage-backed securities
Amortized cost
Marketable securities held-to-maturity, amortized cost	15,333	18,036
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	835	187
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	16,168	18,223
Fixed rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	1,823	2,197
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	128	83
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	1,951	2,280
Fixed rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	11,936	14,016
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	659	68
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	12,595	14,084
Variable rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	970	1,210
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	33	28
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	1,003	1,238
Variable rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	604	613
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	15	8
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	$ 619	$ 621

Marketable Securities - Held _2

Marketable Securities - Held To Maturity, by Contractual Maturity (Details) $ in Thousands	Sep. 30, 2020USD ($)
Amortized cost
Total marketable securities held-to-maturity	$ 15,333
Fair value
Total marketable securities held-to-maturity	16,168
Residential mortgage-backed securities
Amortized cost
Due in one year through five years	1,256
Due after ten years	14,077
Total marketable securities held-to-maturity	15,333
Fair value
Due in one year through five years	1,330
Due after ten years	14,838
Total marketable securities held-to-maturity	$ 16,168

Marketable Securities - Fair Va

Marketable Securities - Fair Value of and Gross Unrealized Losses on Investment Securities (Details) $ in Thousands	Sep. 30, 2020USD ($)security	Dec. 31, 2019USD ($)
Marketable securities
Less than 12 months - Fair value	$ 281,745	$ 173,112
Less than 12 months - Unrealized loss	(940)	(858)
12 months or more - Fair value	8,213	161,944
12 months or more - Unrealized loss	(121)	(2,087)
Total - Fair value	289,958	335,056
Total - Unrealized loss	$ (1,061)	(2,945)
Number of available-for-sale debt securities in unrealized loss position | security	106
U.S. government and agencies
Marketable securities
Less than 12 months - Fair value	$ 44,892	0
Less than 12 months - Unrealized loss	(93)	0
12 months or more - Fair value	2,081	52,620
12 months or more - Unrealized loss	(85)	(336)
Total - Fair value	46,973	52,620
Total - Unrealized loss	(178)	(336)
Municipal securities
Marketable securities
Less than 12 months - Fair value	178
Less than 12 months - Unrealized loss	(2)
12 months or more - Fair value	0
12 months or more - Unrealized loss	0
Total - Fair value	178
Total - Unrealized loss	(2)
Residential mortgage-backed securities | Agency CMOs
Marketable securities
Less than 12 months - Fair value	236,675	173,112
Less than 12 months - Unrealized loss	(845)	(858)
12 months or more - Fair value	6,132	109,324
12 months or more - Unrealized loss	(36)	(1,751)
Total - Fair value	242,807	282,436
Total - Unrealized loss	$ (881)	$ (2,609)

Marketable Securities - Credit

Marketable Securities - Credit Quality of Held To Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities:	$ 15,333	$ 18,036
Residential mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities:	15,333
AA Plus
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities:	15,333
AA Plus | Residential mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities:	$ 15,333

Loans Receivable - Summary of O

Loans Receivable - Summary of Originated and Acquired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 10,781,852		$ 8,808,674
Allowance for credit losses	(140,209)	$ (140,586)	(57,941)	$ (52,859)	$ (53,107)	$ (55,214)
Total loans receivable, net	10,641,643		8,750,733
Loans held-for-sale	25,140		7,709
Unearned income, unamortized premiums and discounts and deferred fees and costs	34,200		40,200
Personal banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	6,114,817		5,336,177
Allowance for credit losses	(41,481)	(37,412)	(18,356)
Personal banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,143,369		2,868,127
Allowance for credit losses	(12,036)	(11,708)	(2,574)
Loans held-for-sale			7,700
Personal banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,484,365		1,342,918
Allowance for credit losses	(9,585)	(9,363)	(3,189)
Personal banking | Vehicle loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,132,840		861,192
Allowance for credit losses	(16,713)	(13,835)	(7,292)
Personal banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	354,243		263,940
Allowance for credit losses	(3,147)	(2,506)	(5,301)
Commercial banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	4,667,035		3,472,497
Allowance for credit losses	(98,728)	(103,174)	(39,585)
Commercial banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,767,888		2,228,109
Allowance for credit losses	(73,410)	(72,833)	(15,843)
Commercial banking | Commercial real estate loans - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	551,855		526,281
Allowance for credit losses	(13,570)	(14,827)	(5,745)
Commercial banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,347,292		718,107
Allowance for credit losses	(11,748)	$ (15,514)	(17,997)
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	8,842,877		7,987,057
Allowance for credit losses	(109,580)		(51,439)	(47,417)	(48,429)	(51,751)
Total loans receivable, net	8,733,297		7,935,618
Originated | Personal banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	5,206,418		4,973,850
Allowance for credit losses				(17,473)	(17,665)	(18,318)
Originated | Personal banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,794,489		2,785,189
Allowance for credit losses				(2,507)	(3,909)	(4,054)
Originated | Personal banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,169,709		1,099,514
Allowance for credit losses				(2,791)	(2,990)	(3,184)
Originated | Personal banking | Vehicle loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	960,178		850,804
Originated | Personal banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	282,042		238,343
Allowance for credit losses				(12,175)	(10,766)	(11,080)
Originated | Commercial banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,636,459		3,013,207
Allowance for credit losses				(29,944)	(30,764)	(33,433)
Originated | Commercial banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,123,387		1,915,949
Allowance for credit losses				(20,215)	(20,962)	(26,379)
Originated | Commercial banking | Commercial real estate loans - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	365,580		433,099
Originated | Commercial banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,147,492		664,159
Allowance for credit losses				(9,729)	(9,802)	(7,054)
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,938,975		821,617
Allowance for credit losses	(30,629)		(6,502)	(5,442)	(4,678)	(3,463)
Total loans receivable, net	1,908,346		815,115
Acquired | Personal banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	908,399		362,327
Allowance for credit losses				(941)	(959)	(850)
Acquired | Personal banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	348,880		82,938
Allowance for credit losses				(92)	(104)	(83)
Acquired | Personal banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	314,656		243,404
Allowance for credit losses				(295)	(344)	(348)
Acquired | Personal banking | Vehicle loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	172,662		10,388
Acquired | Personal banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	72,201		25,597
Allowance for credit losses				(554)	(511)	(419)
Acquired | Commercial banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,030,576		459,290
Allowance for credit losses				(4,501)	(3,719)	(2,613)
Acquired | Commercial banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	644,501		312,160
Allowance for credit losses				(3,622)	(2,571)	(1,996)
Acquired | Commercial banking | Commercial real estate loans - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	186,275		93,182
Acquired | Commercial banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 199,800		$ 53,948
Allowance for credit losses				$ (879)	$ (1,148)	$ (617)

Loans Receivable - Changes in t

Loans Receivable - Changes in the Allowance for Losses on Loans Receivable (Details) - USD ($)	Jan. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member			us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Changes in allowance for losses on allocated loans receivable
Beginning balance	$ 57,941,000	$ 140,586,000	$ 53,107,000	$ 57,941,000	$ 55,214,000	$ 55,214,000
Current period provision		6,818,000	3,302,000	86,205,000	14,436,000
Charge-offs		(8,997,000)	(5,274,000)	(28,704,000)	(21,485,000)
Recoveries		1,802,000	1,724,000	5,130,000	4,694,000
Initial ACL on loans purchased with credit deterioration		0		8,845,000
Ending balance		140,209,000	52,859,000	140,209,000	52,859,000	57,941,000	$ 55,214,000
Loans classified as held-for-investment sold		0		50,000,000
Gain on sale of loans		0	826,000	1,302,000	826,000
Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	10,792,000			10,792,000
Initial ACL on loans purchased with credit deterioration				517,000
Ending balance	10,800,000					10,792,000
Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	974,000	10,183,000		974,000
Current period provision		(3,936,000)		3,023,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		6,247,000		6,247,000		974,000
Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,250,000			2,250,000
Ending balance						2,250,000
Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance	51,439,000		48,429,000	51,439,000	51,751,000	51,751,000
Current period provision			2,089,000		9,374,000
Charge-offs			(4,639,000)		(17,302,000)
Recoveries			1,538,000		3,594,000
Ending balance		109,580,000	47,417,000	109,580,000	47,417,000	51,439,000	51,751,000
Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance	6,502,000		4,678,000	6,502,000	3,463,000	3,463,000
Current period provision			1,213,000		5,062,000
Charge-offs			(635,000)		(4,183,000)
Recoveries			186,000		1,100,000
Ending balance		30,629,000	5,442,000	30,629,000	5,442,000	6,502,000	3,463,000
Acquired | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Ending balance	517,000
Personal banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	18,356,000	37,412,000		18,356,000
Current period provision		6,433,000		17,687,000
Charge-offs		(3,573,000)		(11,095,000)
Recoveries		1,209,000		3,185,000
Initial ACL on loans purchased with credit deterioration		0		1,703,000
Ending balance		41,481,000		41,481,000		18,356,000
Personal banking | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	11,645,000			11,645,000
Ending balance						11,645,000
Personal banking | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	725,000	38,000		725,000
Current period provision		5,000		13,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		43,000		43,000		725,000
Personal banking | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(695,000)			(695,000)
Ending balance						(695,000)
Personal banking | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			17,665,000		18,318,000	18,318,000
Current period provision			2,337,000		6,782,000
Charge-offs			(3,260,000)		(9,875,000)
Recoveries			731,000		2,248,000
Ending balance			17,473,000		17,473,000		18,318,000
Personal banking | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			959,000		850,000	850,000
Current period provision			324,000		430,000
Charge-offs			(474,000)		(742,000)
Recoveries			132,000		403,000
Ending balance			941,000		941,000		850,000
Personal banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,574,000	11,708,000		2,574,000
Current period provision		268,000		1,132,000
Charge-offs		(129,000)		(510,000)
Recoveries		189,000		304,000
Initial ACL on loans purchased with credit deterioration		0		1,095,000
Ending balance		12,036,000		12,036,000		2,574,000
Personal banking | Residential mortgage loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	7,441,000			7,441,000
Ending balance						7,441,000
Personal banking | Residential mortgage loans | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	0	0		0
Current period provision		3,000		3,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		3,000		3,000		0
Personal banking | Residential mortgage loans | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Ending balance	0
Personal banking | Residential mortgage loans | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			3,909,000		4,054,000	4,054,000
Current period provision			(1,361,000)		(991,000)
Charge-offs			(109,000)		(847,000)
Recoveries			68,000		291,000
Ending balance			2,507,000		2,507,000		4,054,000
Personal banking | Residential mortgage loans | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			104,000		83,000	83,000
Current period provision			41,000		50,000
Charge-offs			(81,000)		(97,000)
Recoveries			28,000		56,000
Ending balance			92,000		92,000		83,000
Personal banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	3,189,000	9,363,000		3,189,000
Current period provision		183,000		536,000
Charge-offs		(88,000)		(550,000)
Recoveries		127,000		408,000
Initial ACL on loans purchased with credit deterioration		0		216,000
Ending balance		9,585,000		9,585,000		3,189,000
Personal banking | Home equity loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,786,000			5,786,000
Ending balance						5,786,000
Personal banking | Home equity loans | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	323,000	38,000		323,000
Current period provision		2,000		10,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		40,000		40,000		323,000
Personal banking | Home equity loans | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(293,000)			(293,000)
Ending balance						(293,000)
Personal banking | Home equity loans | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			2,990,000		3,184,000	3,184,000
Current period provision			(81,000)		36,000
Charge-offs			(176,000)		(536,000)
Recoveries			58,000		107,000
Ending balance			2,791,000		2,791,000		3,184,000
Personal banking | Home equity loans | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			344,000		348,000	348,000
Current period provision			220,000		249,000
Charge-offs			(290,000)		(472,000)
Recoveries			21,000		170,000
Ending balance			295,000		295,000		348,000
Personal banking | Vehicle loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	7,292,000	13,835,000		7,292,000
Current period provision		4,111,000		12,419,000
Charge-offs		(1,763,000)		(5,369,000)
Recoveries		530,000		1,294,000
Initial ACL on loans purchased with credit deterioration		0		235,000
Ending balance		16,713,000		16,713,000		7,292,000
Personal banking | Vehicle loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	842,000			842,000
Ending balance						842,000
Personal banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,301,000	2,506,000		5,301,000
Current period provision		1,871,000		3,600,000
Charge-offs		(1,593,000)		(4,666,000)
Recoveries		363,000		1,179,000
Initial ACL on loans purchased with credit deterioration		0		157,000
Ending balance		3,147,000		3,147,000		5,301,000
Personal banking | Consumer loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(2,424,000)			(2,424,000)
Ending balance						(2,424,000)
Personal banking | Consumer loans | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	402,000			402,000
Current period provision				0
Charge-offs				0
Recoveries				0
Initial ACL on loans purchased with credit deterioration				0
Ending balance		0		0		402,000
Personal banking | Consumer loans | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(402,000)			(402,000)
Ending balance						(402,000)
Personal banking | Consumer loans | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			10,766,000		11,080,000	11,080,000
Current period provision			3,779,000		7,737,000
Charge-offs			(2,975,000)		(8,492,000)
Recoveries			605,000		1,850,000
Ending balance			12,175,000		12,175,000		11,080,000
Personal banking | Consumer loans | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			511,000		419,000	419,000
Current period provision			63,000		131,000
Charge-offs			(103,000)		(173,000)
Recoveries			83,000		177,000
Ending balance			554,000		554,000		419,000
Commercial banking
Changes in allowance for losses on allocated loans receivable
Beginning balance	39,585,000	103,174,000		39,585,000
Current period provision		385,000		68,518,000
Charge-offs		(5,424,000)		(17,609,000)
Recoveries		593,000		1,945,000
Initial ACL on loans purchased with credit deterioration		0		7,142,000
Ending balance		98,728,000		98,728,000		39,585,000
Commercial banking | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(853,000)			(853,000)
Ending balance						(853,000)
Commercial banking | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	249,000	10,145,000		249,000
Current period provision		(3,941,000)		3,010,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		6,204,000		6,204,000		249,000
Commercial banking | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,945,000			2,945,000
Ending balance						2,945,000
Commercial banking | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			30,764,000		33,433,000	33,433,000
Current period provision			(248,000)		2,592,000
Charge-offs			(1,379,000)		(7,427,000)
Recoveries			807,000		1,346,000
Ending balance			29,944,000		29,944,000		33,433,000
Commercial banking | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			3,719,000		2,613,000	2,613,000
Current period provision			889,000		4,632,000
Charge-offs			(161,000)		(3,441,000)
Recoveries			54,000		697,000
Ending balance			4,501,000		4,501,000		2,613,000
Commercial banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	15,843,000	72,833,000		15,843,000
Current period provision		780,000		50,018,000
Charge-offs		(470,000)		(1,470,000)
Recoveries		267,000		1,011,000
Initial ACL on loans purchased with credit deterioration		0		5,720,000
Ending balance		73,410,000		73,410,000		15,843,000
Commercial banking | Commercial real estate loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,288,000			2,288,000
Ending balance						2,288,000
Commercial banking | Commercial real estate loans | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	77,000	5,135,000		77,000
Current period provision		(2,712,000)		412,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		2,423,000		2,423,000		77,000
Commercial banking | Commercial real estate loans | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,934,000			1,934,000
Ending balance						1,934,000
Commercial banking | Commercial real estate loans | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			20,962,000		26,379,000	26,379,000
Current period provision			(1,206,000)		(2,177,000)
Charge-offs			(261,000)		(4,978,000)
Recoveries			720,000		991,000
Ending balance			20,215,000		20,215,000		26,379,000
Commercial banking | Commercial real estate loans | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			2,571,000		1,996,000	1,996,000
Current period provision			1,155,000		1,432,000
Charge-offs			(128,000)		(382,000)
Recoveries			24,000		576,000
Ending balance			3,622,000		3,622,000		1,996,000
Commercial banking | Commercial real estate loans - owner occupied
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,745,000	14,827,000		5,745,000
Current period provision		(1,205,000)		5,642,000
Charge-offs		(62,000)		(83,000)
Recoveries		10,000		25,000
Initial ACL on loans purchased with credit deterioration		0		963,000
Ending balance		13,570,000		13,570,000		5,745,000
Commercial banking | Commercial real estate loans - owner occupied | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,278,000			1,278,000
Ending balance						1,278,000
Commercial banking | Commercial real estate loans - owner occupied | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	3,000	626,000		3,000
Current period provision		(157,000)		378,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		469,000		469,000		3,000
Commercial banking | Commercial real estate loans - owner occupied | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	88,000			88,000
Ending balance						88,000
Commercial banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	17,997,000	15,514,000		17,997,000
Current period provision		810,000		12,858,000
Charge-offs		(4,892,000)		(16,056,000)
Recoveries		316,000		909,000
Initial ACL on loans purchased with credit deterioration		0		459,000
Ending balance		11,748,000		11,748,000		17,997,000
Commercial banking | Commercial loans | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	(4,419,000)			(4,419,000)
Ending balance						(4,419,000)
Commercial banking | Commercial loans | Off-Balance sheet exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	169,000	4,384,000		169,000
Current period provision		(1,072,000)		2,220,000
Charge-offs		0		0
Recoveries		0		0
Initial ACL on loans purchased with credit deterioration		0		0
Ending balance		$ 3,312,000		3,312,000		169,000
Commercial banking | Commercial loans | Off-Balance sheet exposure | Cumulative effect of ASU 2016-13
Changes in allowance for losses on allocated loans receivable
Beginning balance	$ 923,000			$ 923,000
Ending balance						923,000
Commercial banking | Commercial loans | Originated
Changes in allowance for losses on allocated loans receivable
Beginning balance			9,802,000		7,054,000	7,054,000
Current period provision			958,000		4,769,000
Charge-offs			(1,118,000)		(2,449,000)
Recoveries			87,000		355,000
Ending balance			9,729,000		9,729,000		7,054,000
Commercial banking | Commercial loans | Acquired
Changes in allowance for losses on allocated loans receivable
Beginning balance			1,148,000		617,000	$ 617,000
Current period provision			(266,000)		3,200,000
Charge-offs			(33,000)		(3,059,000)
Recoveries			30,000		121,000
Ending balance			$ 879,000		$ 879,000		$ 617,000

Loans Receivable - Loan Portfol

Loans Receivable - Loan Portfolio by Portfolio Segment and by Class of Financing Receivable (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2020USD ($)contract	Jun. 30, 2020USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 10,781,852			$ 8,808,674
Allowance for loan losses	140,209	$ 140,586		57,941	$ 52,859	$ 53,107	$ 55,214
Nonaccrual loans	106,798
Nonaccrual loans	84,482		$ 68,870	68,870
Loans 90 days past due and accruing	495			32
TDRs	34,804			31,999
Allowance related to TDRs	3,475			3,002
Additional commitments to customers with loans classified as TDRs	$ 682			566
Number of TDR contracts with subsequent default | contract	0
Personal banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 6,114,817			5,336,177
Allowance for loan losses	41,481	37,412		18,356
Nonaccrual loans	32,385
Nonaccrual loans	31,821		25,447	25,447
Loans 90 days past due and accruing	495			32
TDRs	10,555			9,523
Allowance related to TDRs	1,469			953
Additional commitments to customers with loans classified as TDRs	26			26
Personal banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,143,369			2,868,127
Allowance for loan losses	12,036	11,708		2,574
Nonaccrual loans	16,514
Nonaccrual loans	16,514		14,476	14,476
Loans 90 days past due and accruing	0			0
TDRs	8,464			7,550
Allowance related to TDRs	891			560
Additional commitments to customers with loans classified as TDRs	0			0
Personal banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,484,365			1,342,918
Allowance for loan losses	9,585	9,363		3,189
Nonaccrual loans	9,274
Nonaccrual loans	8,818		6,745	6,745
Loans 90 days past due and accruing	0			32
TDRs	2,090			1,973
Allowance related to TDRs	578			393
Additional commitments to customers with loans classified as TDRs	26			26
Personal banking | Vehicle loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,132,840			861,192
Allowance for loan losses	16,713	13,835		7,292
Nonaccrual loans	5,659
Nonaccrual loans	5,562		3,147
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
Personal banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	354,243			263,940
Allowance for loan losses	3,147	2,506		5,301
Nonaccrual loans	938
Nonaccrual loans	927		1,079
Loans 90 days past due and accruing	495
TDRs	1
Allowance related to TDRs	0
Additional commitments to customers with loans classified as TDRs	0
Personal banking | Consumer Loan, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross				1,125,132
Allowance for loan 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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	4,667,035			3,472,497
Allowance for loan losses	98,728	103,174		39,585
Nonaccrual loans	74,413
Nonaccrual loans	52,661		43,423	43,423
Loans 90 days past due and accruing	0			0
TDRs	24,249			22,476
Allowance related to TDRs	2,006			2,049
Additional commitments to customers with loans classified as TDRs	656			540
Commercial banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,767,888			2,228,109
Allowance for loan losses	73,410	72,833		15,843
Nonaccrual loans	57,794
Nonaccrual loans	40,123		18,832
Loans 90 days past due and accruing	0
TDRs	18,599
Allowance related to TDRs	1,625
Additional commitments to customers with loans classified as TDRs	71
Commercial banking | Commercial real estate loans - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	551,855			526,281
Allowance for loan losses	13,570	14,827		5,745
Nonaccrual loans	3,749
Nonaccrual loans	3,748		16,032
Loans 90 days past due and accruing	0
TDRs	920
Allowance related to TDRs	186
Additional commitments to customers with loans classified as TDRs	349
Commercial banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,347,292			718,107
Allowance for loan losses	11,748	$ 15,514		17,997
Nonaccrual loans	12,870
Nonaccrual loans	8,790		$ 8,559	8,559
Loans 90 days past due and accruing	0			0
TDRs	4,730			3,118
Allowance related to TDRs	195			665
Additional commitments to customers with loans classified as TDRs	$ 236			64
Commercial banking | Commercial Real Estate Loan, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross				2,754,390
Allowance for loan 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

Loans Receivable - Composition

Loans Receivable - Composition of Impaired Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Jan. 01, 2020
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	$ 84,482,000	$ 84,482,000	$ 68,870,000	$ 68,870,000
Nonaccrual loans with no allowance	22,316,000	22,316,000
Loans 90 days past due and accruing	495,000	495,000	147,000
Amortized cost basis of collateral-dependent loans	43,766,000	43,766,000
Total impaired loans			105,993,000
Average recorded investment in impaired loans			88,643,000
Interest income recognized on impaired loans	186,000	574,000	3,070,000
90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			51,680,000
Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			17,190,000
Loans less than 90 days delinquent reviewed for impairment			16,849,000
TDRs less than 90 days delinquent not included elsewhere			20,274,000
Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	38,108,000	38,108,000
Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,003,000	2,003,000
Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	3,655,000	3,655,000
Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			4,975,000
Average recorded investment in impaired loans			5,332,000
Interest income recognized on impaired loans			551,000
Personal banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	31,821,000	31,821,000	25,447,000	25,447,000
Nonaccrual loans with no allowance	564,000	564,000
Loans 90 days past due and accruing	495,000	495,000
Amortized cost basis of collateral-dependent loans	1,438,000	1,438,000
Total impaired loans			33,918,000
Average recorded investment in impaired loans			32,180,000
Interest income recognized on impaired loans			1,235,000
Personal banking | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			21,927,000
Personal banking | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			3,520,000
Loans less than 90 days delinquent reviewed for impairment			0
TDRs less than 90 days delinquent not included elsewhere			8,471,000
Personal banking | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,438,000	1,438,000
Personal banking | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			1,464,000
Average recorded investment in impaired loans			1,745,000
Interest income recognized on impaired loans			273,000
Personal banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	16,514,000	16,514,000	14,476,000	14,476,000
Nonaccrual loans with no allowance	0	0
Loans 90 days past due and accruing	0	0
Amortized cost basis of collateral-dependent loans	1,338,000	1,338,000
Total impaired loans			21,293,000
Average recorded investment in impaired loans			19,767,000
Interest income recognized on impaired loans			688,000
Personal banking | Residential mortgage loans | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			12,682,000
Personal banking | Residential mortgage loans | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			1,794,000
Loans less than 90 days delinquent reviewed for impairment			0
TDRs less than 90 days delinquent not included elsewhere			6,817,000
Personal banking | Residential mortgage loans | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	1,338,000	1,338,000
Personal banking | Residential mortgage loans | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Residential mortgage loans | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Residential mortgage loans | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			742,000
Average recorded investment in impaired loans			866,000
Interest income recognized on impaired loans			147,000
Personal banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	8,818,000	8,818,000	6,745,000	6,745,000
Nonaccrual loans with no allowance	456,000	456,000
Loans 90 days past due and accruing	0	0
Amortized cost basis of collateral-dependent loans	100,000	100,000
Total impaired loans			8,399,000
Average recorded investment in impaired loans			8,571,000
Interest income recognized on impaired loans			368,000
Personal banking | Home equity loans | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			5,635,000
Personal banking | Home equity loans | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			1,110,000
Loans less than 90 days delinquent reviewed for impairment			0
TDRs less than 90 days delinquent not included elsewhere			1,654,000
Personal banking | Home equity loans | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	100,000	100,000
Personal banking | Home equity loans | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Home equity loans | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Personal banking | Home equity loans | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			715,000
Average recorded investment in impaired loans			861,000
Interest income recognized on impaired loans			114,000
Personal banking | Vehicle loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	5,562,000	5,562,000		3,147,000
Nonaccrual loans with no allowance	97,000	97,000
Loans 90 days past due and accruing	0	0
Personal banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	927,000	927,000		1,079,000
Nonaccrual loans with no allowance	11,000	11,000
Loans 90 days past due and accruing	495,000	495,000
Total impaired loans			4,226,000
Average recorded investment in impaired loans			3,842,000
Interest income recognized on impaired loans			179,000
Personal banking | Consumer loans | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			3,610,000
Personal banking | Consumer loans | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			616,000
Loans less than 90 days delinquent reviewed for impairment			0
TDRs less than 90 days delinquent not included elsewhere			0
Personal banking | Consumer loans | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			7,000
Average recorded investment in impaired loans			18,000
Interest income recognized on impaired loans			12,000
Commercial banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	52,661,000	52,661,000	43,423,000	43,423,000
Nonaccrual loans with no allowance	21,752,000	21,752,000
Loans 90 days past due and accruing	0	0
Amortized cost basis of collateral-dependent loans	42,328,000	42,328,000
Total impaired loans			72,075,000
Average recorded investment in impaired loans			56,463,000
Interest income recognized on impaired loans			1,835,000
Commercial banking | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			29,753,000
Commercial banking | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			13,670,000
Loans less than 90 days delinquent reviewed for impairment			16,849,000
TDRs less than 90 days delinquent not included elsewhere			11,803,000
Commercial banking | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	36,670,000	36,670,000
Commercial banking | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,003,000	2,003,000
Commercial banking | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	3,655,000	3,655,000
Commercial banking | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			3,511,000
Average recorded investment in impaired loans			3,587,000
Interest income recognized on impaired loans			278,000
Commercial banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	40,123,000	40,123,000		18,832,000
Nonaccrual loans with no allowance	17,671,000	17,671,000
Loans 90 days past due and accruing	0	0
Amortized cost basis of collateral-dependent loans	34,470,000	34,470,000
Total impaired loans			46,126,000
Average recorded investment in impaired loans			46,284,000
Interest income recognized on impaired loans			1,490,000
Commercial banking | Commercial real estate loans | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			25,014,000
Commercial banking | Commercial real estate loans | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			9,850,000
Loans less than 90 days delinquent reviewed for impairment			933,000
TDRs less than 90 days delinquent not included elsewhere			10,329,000
Commercial banking | Commercial real estate loans | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	32,390,000	32,390,000
Commercial banking | Commercial real estate loans | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	0	0
Commercial banking | Commercial real estate loans | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,080,000	2,080,000
Commercial banking | Commercial real estate loans | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			3,433,000
Average recorded investment in impaired loans			3,509,000
Interest income recognized on impaired loans			273,000
Commercial banking | Commercial real estate loans - owner occupied
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,748,000	3,748,000		16,032,000
Nonaccrual loans with no allowance	1,000	1,000
Loans 90 days past due and accruing	0	0
Commercial banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	8,790,000	8,790,000	8,559,000	$ 8,559,000
Nonaccrual loans with no allowance	4,080,000	4,080,000
Loans 90 days past due and accruing	0	0
Amortized cost basis of collateral-dependent loans	7,858,000	7,858,000
Total impaired loans			25,949,000
Average recorded investment in impaired loans			10,179,000
Interest income recognized on impaired loans			345,000
Commercial banking | Commercial loans | 90 days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			4,739,000
Commercial banking | Commercial loans | Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans			3,820,000
Loans less than 90 days delinquent reviewed for impairment			15,916,000
TDRs less than 90 days delinquent not included elsewhere			1,474,000
Commercial banking | Commercial loans | Real estate
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	4,280,000	4,280,000
Commercial banking | Commercial loans | Equipment
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	2,003,000	2,003,000
Commercial banking | Commercial loans | Other
Composition of impaired loans by portfolio segment and by class of financing receivable
Amortized cost basis of collateral-dependent loans	$ 1,575,000	$ 1,575,000
Commercial banking | Commercial loans | Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Total impaired loans			78,000
Average recorded investment in impaired loans			78,000
Interest income recognized on impaired loans			$ 5,000

Loans Receivable - Evaluation o

Loans Receivable - Evaluation of Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) $ in Thousands	Dec. 31, 2019USD ($)
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	$ 8,739,372
Loans individually evaluated for impairment	69,302
Loans individually evaluated for impairment for which there is a related impairment reserve	57,999
Related impairment reserve	11,762
Loans individually evaluated for impairment for which there is no related reserve	11,303
Personal banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	5,326,093
Loans individually evaluated for impairment	10,084
Loans individually evaluated for impairment for which there is a related impairment reserve	10,084
Related impairment reserve	956
Loans individually evaluated for impairment for which there is no related reserve	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
Loans individually evaluated for impairment	8,101
Loans individually evaluated for impairment for which there is a related impairment reserve	8,101
Related impairment reserve	560
Loans individually evaluated for impairment for which there is no related reserve	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
Loans individually evaluated for impairment	1,974
Loans individually evaluated for impairment for which there is a related impairment reserve	1,974
Related impairment reserve	393
Loans individually evaluated for impairment for which there is no related reserve	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
Loans individually evaluated for impairment	9
Loans individually evaluated for impairment for which there is a related impairment reserve	9
Related impairment reserve	3
Loans individually evaluated for impairment for which there is no related reserve	0
Commercial banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	3,413,279
Loans individually evaluated for impairment	59,218
Loans individually evaluated for impairment for which there is a related impairment reserve	47,915
Related impairment reserve	10,806
Loans individually evaluated for impairment for which there is no related reserve	11,303
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
Loans individually evaluated for impairment	35,535
Loans individually evaluated for impairment for which there is a related impairment reserve	29,578
Related impairment reserve	2,679
Loans individually evaluated for impairment for which there is no related reserve	5,957
Commercial banking | Commercial loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	694,424
Loans individually evaluated for impairment	23,683
Loans individually evaluated for impairment for which there is a related impairment reserve	18,337
Related impairment reserve	8,127
Loans individually evaluated for impairment for which there is no related reserve	$ 5,346

Loans Receivable - Roll Forward

Loans Receivable - Roll Forward of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Dec. 31, 2019USD ($)
Number of contracts
Beginning balance | contract	167	183	176	195
Number of contracts new TDRs | contract	7	3	10	5
Number of re-modified TDRs | contract	3	8	5	8
Number of contracts net paydowns | contract	0	0	0	0
Ending balance | contract	173	177	173	177
Amount
Beginning TDR balance	$ 35,450	$ 31,269	$ 31,999	$ 33,608
New TDRs	803	520	889	826
Re-modified TDRs	6,679	4,773	9,720	4,773
Net paydowns	(8,127)	(5,668)	(7,192)	(6,454)
Ending TDR balance	34,804	30,300	34,804	30,300
Accruing TDRs	17,684	21,162	17,684	21,162
Non-accrual TDRs	$ 17,120	$ 9,138	$ 17,120	$ 9,138	$ 9,000
Residential mortgage loans
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	0	0	2	4
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ 0	$ 0	$ (330)	$ (180)
Home equity loans
Number of contracts
Number of contracts charged off | contract	0	0	1	0
Number of contracts paid off | contract	0	3	2	7
Amount
Amount of contracts charged off	$ 0	$ 0	$ (10)	$ 0
Amount of contracts paid off	$ 0	$ (68)	$ (3)	$ (143)
Vehicle loans
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	0	0	0	0
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ 0	$ 0	$ 0	$ 0
Commercial real estate loans
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	0	3	1	9
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ 0	$ (289)	$ (26)	$ (1,893)
Commercial real estate loans - owner occupied
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	0	0	1	0
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ 0	$ 0	$ (25)	$ 0
Commercial loans
Number of contracts
Number of contracts charged off | contract	0	2	0	2
Number of contracts paid off | contract	1	1	6	1
Amount
Amount of contracts charged off	$ 0	$ (235)	$ 0	$ (235)
Amount of contracts paid off	$ (1)	$ (2)	$ (218)	$ (2)

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	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	10	11	14	13
Recorded investment at the time of modification	$ 7,630	$ 6,202	$ 10,274	$ 6,512
Current recorded investment	7,482	5,293	9,615	5,599
Current allowance	$ 817	$ 563	$ 843	$ 596
Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		1		4
Recorded investment at the time of modification		$ 134		$ 3,069
Current recorded investment		126		3,051
Current allowance		$ 104		$ 109
Personal banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	2	3	2
Recorded investment at the time of modification	$ 90	$ 133	$ 176	$ 133
Current recorded investment	89	132	170	132
Current allowance	$ 1	$ 10	$ 15	$ 10
Personal banking | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Personal banking | Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	1	1	1
Recorded investment at the time of modification	$ 90	$ 121	$ 90	$ 121
Current recorded investment	89	121	89	121
Current allowance	$ 1	$ 8	$ 1	$ 8
Personal banking | Residential mortgage loans | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Personal banking | Home equity loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	1	2	1
Recorded investment at the time of modification	$ 0	$ 12	$ 86	$ 12
Current recorded investment	0	11	81	11
Current allowance	$ 0	$ 2	$ 14	$ 2
Personal banking | Home equity loans | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Personal banking | Vehicle loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment at the time of modification	$ 0	$ 0	$ 0	$ 0
Current recorded investment	0	0	0	0
Current allowance	$ 0	$ 0	$ 0	$ 0
Personal banking | Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment at the time of modification	$ 0	$ 0	$ 0	$ 0
Current recorded investment	0	0	0	0
Current allowance	$ 0	$ 0	$ 0	$ 0
Personal banking | Consumer loans | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Commercial banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	9	9	11	11
Recorded investment at the time of modification	$ 7,540	$ 6,069	$ 10,098	$ 6,379
Current recorded investment	7,393	5,161	9,445	5,467
Current allowance	$ 816	$ 553	$ 828	$ 586
Commercial banking | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		1		4
Recorded investment at the time of modification		$ 134		$ 3,069
Current recorded investment		126		3,051
Current allowance		$ 104		$ 109
Commercial banking | Commercial real estate loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	5	8	5	9
Recorded investment at the time of modification	$ 7,096	$ 6,014	$ 7,096	$ 6,314
Current recorded investment	7,040	5,120	7,040	5,417
Current allowance	$ 816	$ 549	$ 816	$ 581
Commercial banking | Commercial real estate loans | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0		2
Recorded investment at the time of modification		$ 0		$ 2,785
Current recorded investment		0		2,775
Current allowance		$ 0		$ 5
Commercial banking | Commercial real estate loans - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	0	1	0
Recorded investment at the time of modification	$ 0	$ 0	$ 58	$ 0
Current recorded investment	0	0	51	0
Current allowance	$ 0	$ 0	$ 10	$ 0
Commercial banking | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	4	1	5	2
Recorded investment at the time of modification	$ 444	$ 55	$ 2,944	$ 65
Current recorded investment	353	41	2,354	50
Current allowance	$ 0	$ 4	$ 2	$ 5
Commercial banking | Commercial loans | Troubled Debt Restructuring Modified With The Previous 12 Months that Subsequently Defaulted
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		1		2
Recorded investment at the time of modification		$ 134		$ 284
Current recorded investment		126		276
Current allowance		$ 104		$ 104

Loans Receivable - Troubled D_2

Loans Receivable - Troubled Debt Restructurings by Type of Modification (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2020contract
Troubled debt restructurings
Number of contracts | contract	10	11	14	13
Troubled debt restructurings	$ 7,482	$ 5,293	$ 9,615	$ 5,599
Number of TDR contracts with subsequent default | contract					0
Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	66	0
Payment
Troubled debt restructurings
Troubled debt restructurings	114	222	114	519
Maturity date
Troubled debt restructurings
Troubled debt restructurings	7,083	5,071	7,149	5,080
Other
Troubled debt restructurings
Troubled debt restructurings	$ 285	$ 0	$ 2,286	$ 0
Personal banking
Troubled debt restructurings
Number of contracts | contract	1	2	3	2
Troubled debt restructurings	$ 89	$ 132	$ 170	$ 132
Personal banking | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	66	0
Personal banking | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	89	132	104	132
Personal banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Residential mortgage loans
Troubled debt restructurings
Number of contracts | contract	1	1	1	1
Troubled debt restructurings	$ 89	$ 121	$ 89	$ 121
Personal banking | Residential mortgage loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Residential mortgage loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Residential mortgage loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	89	121	89	121
Personal banking | Residential mortgage loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Home equity loans
Troubled debt restructurings
Number of contracts | contract	0	1	2	1
Troubled debt restructurings	$ 0	$ 11	$ 81	$ 11
Personal banking | Home equity loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	66	0
Personal banking | Home equity loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Home equity loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	11	15	11
Personal banking | Home equity loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Vehicle loans
Troubled debt restructurings
Number of contracts | contract	0	0	0	0
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Vehicle loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Vehicle loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Vehicle loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Vehicle loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Consumer loans
Troubled debt restructurings
Number of contracts | contract	0	0	0	0
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Personal banking | Consumer loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Consumer loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Consumer loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal banking | Consumer loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Commercial banking
Troubled debt restructurings
Number of contracts | contract	9	9	11	11
Troubled debt restructurings	$ 7,393	$ 5,161	$ 9,445	$ 5,467
Commercial banking | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial banking | Payment
Troubled debt restructurings
Troubled debt restructurings	114	222	114	519
Commercial banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	6,994	4,939	7,045	4,948
Commercial banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 285	$ 0	$ 2,286	$ 0
Commercial banking | Commercial real estate loans
Troubled debt restructurings
Number of contracts | contract	5	8	5	9
Troubled debt restructurings	$ 7,040	$ 5,120	$ 7,040	$ 5,417
Commercial banking | Commercial real estate loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial banking | Commercial real estate loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	222	0	519
Commercial banking | Commercial real estate loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	6,755	4,898	6,755	4,898
Commercial banking | Commercial real estate loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 285	$ 0	$ 285	$ 0
Commercial banking | Commercial real estate loans - owner occupied
Troubled debt restructurings
Number of contracts | contract	0	0	1	0
Troubled debt restructurings	$ 0	$ 0	$ 51	$ 0
Commercial banking | Commercial real estate loans - owner occupied | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial banking | Commercial real estate loans - owner occupied | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial banking | Commercial real estate loans - owner occupied | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	0	51	0
Commercial banking | Commercial real estate loans - owner occupied | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 0
Commercial banking | Commercial loans
Troubled debt restructurings
Number of contracts | contract	4	1	5	2
Troubled debt restructurings	$ 353	$ 41	$ 2,354	$ 50
Commercial banking | Commercial loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial banking | Commercial loans | Payment
Troubled debt restructurings
Troubled debt restructurings	114	0	114	0
Commercial banking | Commercial loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	239	41	239	50
Commercial banking | Commercial loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 2,001	$ 0

Loans Receivable - Loan Delinqu

Loans Receivable - Loan Delinquencies (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Loan payment delinquencies
Total delinquency	$ 105,707	$ 119,401
Current	10,676,145	8,689,273
Total loans receivable	10,781,852	8,808,674
90 days or greater delinquent and accruing	495	147
30-59 days delinquent
Loan payment delinquencies
Total delinquency	21,193	48,081
60-89 days delinquent
Loan payment delinquencies
Total delinquency	14,266	19,493
90 days or greater delinquent
Loan payment delinquencies
Total delinquency	70,248	51,827
Personal banking
Loan payment delinquencies
Total delinquency	52,445
Current	6,062,372
Total loans receivable	6,114,817
90 days or greater delinquent and accruing	495
Personal banking | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	14,306
Personal banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	9,697
Personal banking | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	28,442
Personal banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	20,274
Current	3,123,095
Total loans receivable	3,143,369
90 days or greater delinquent and accruing	0
Personal banking | Residential mortgage loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	736
Personal banking | Residential mortgage loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	4,788
Personal banking | Residential mortgage loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	14,750
Personal banking | Home equity loans
Loan payment delinquencies
Total delinquency	14,689
Current	1,469,676
Total loans receivable	1,484,365
90 days or greater delinquent and accruing	0
Personal banking | Home equity loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	4,984
Personal banking | Home equity loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	1,860
Personal banking | Home equity loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	7,845
Personal banking | Vehicle loans
Loan payment delinquencies
Total delinquency	12,791
Current	1,120,048
Total loans receivable	1,132,839
90 days or greater delinquent and accruing	0
Personal banking | Vehicle loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	5,980
Personal banking | Vehicle loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	2,281
Personal banking | Vehicle loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	4,530
Personal banking | Consumer loans
Loan payment delinquencies
Total delinquency	4,691
Current	349,553
Total loans receivable	354,244
90 days or greater delinquent and accruing	495
Personal banking | Consumer loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	2,606
Personal banking | Consumer loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	768
Personal banking | Consumer loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	1,317
Commercial banking
Loan payment delinquencies
Total delinquency	53,262
Current	4,613,773
Total loans receivable	4,667,035
90 days or greater delinquent and accruing	0
Commercial banking | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	6,887
Commercial banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	4,569
Commercial banking | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	41,806
Commercial banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	41,184
Current	2,726,704
Total loans receivable	2,767,888
90 days or greater delinquent and accruing	0
Commercial banking | Commercial real estate loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	3,463
Commercial banking | Commercial real estate loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	4,212
Commercial banking | Commercial real estate loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	33,509
Commercial banking | Commercial real estate loans - owner occupied
Loan payment delinquencies
Total delinquency	3,614
Current	548,241
Total loans receivable	551,855
90 days or greater delinquent and accruing	0
Commercial banking | Commercial real estate loans - owner occupied | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	1,627
Commercial banking | Commercial real estate loans - owner occupied | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	0
Commercial banking | Commercial real estate loans - owner occupied | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	1,987
Commercial banking | Commercial loans
Loan payment delinquencies
Total delinquency	8,464
Current	1,338,828
Total loans receivable	1,347,292
90 days or greater delinquent and accruing	0
Commercial banking | Commercial loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency	1,797
Commercial banking | Commercial loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency	357
Commercial banking | Commercial loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency	$ 6,310
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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		41,120
Originated | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		18,613
Originated | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		34,535
Originated | Personal banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		10,866
Originated | Personal banking | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		20,447
Originated | Personal banking | Residential mortgage loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		5,572
Originated | Personal banking | Residential mortgage loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency		11,080
Originated | Personal banking | Home equity loans
Loan payment delinquencies
Total delinquency		11,788
Current		1,088,136
Total loans receivable		1,100,023
90 days or greater delinquent and accruing		0
Originated | Personal banking | Home equity loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		5,119
Originated | Personal banking | Home equity loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		2,096
Originated | Personal banking | Home equity loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency		4,573
Originated | Personal banking | Consumer loans
Loan payment delinquencies
Total delinquency		15,634
Current		1,073,103
Total loans receivable		1,088,638
90 days or greater delinquent and accruing		0
Originated | Personal banking | Consumer loans | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		8,969
Originated | Personal banking | Consumer loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		3,198
Originated | Personal banking | Consumer loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		6,585
Originated | Commercial banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		7,747
Originated | Commercial banking | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		5,598
Originated | Commercial banking | Commercial real estate loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		1,387
Originated | Commercial banking | Commercial real estate loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		987
Originated | Commercial banking | Commercial loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		6,360
Originated | Commercial banking | Commercial loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		6,961
Acquired | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		880
Acquired | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		4,438
Acquired | Personal banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		534
Acquired | Personal banking | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		2,849
Acquired | Personal banking | Residential mortgage loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		121
Acquired | Personal banking | Residential mortgage loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		1,350
Acquired | Personal banking | Home equity loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		309
Acquired | Personal banking | Home equity loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		239
Acquired | Personal banking | Consumer loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		104
Acquired | Personal banking | Consumer loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		2,523
Acquired | Commercial banking | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		346
Acquired | Commercial banking | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		2,323
Acquired | Commercial banking | Commercial real estate loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		303
Acquired | Commercial banking | Commercial real estate loans | 90 days or greater 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 | 30-59 days delinquent
Loan payment delinquencies
Total delinquency		200
Acquired | Commercial banking | Commercial loans | 60-89 days delinquent
Loan payment delinquencies
Total delinquency		43
Acquired | Commercial banking | Commercial loans | 90 days or greater delinquent
Loan payment delinquencies
Total delinquency		$ 443

Loans Receivable - Credit Quali

Loans Receivable - Credit Quality Indicators (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Credit quality indicators
Year to date September 30, 2020	$ 2,127,314
2019	1,858,331
2018	1,236,816
2017	1,013,782
2016	748,201
Prior	2,767,576
Revolving loans	944,770
Revolving loans converted to term loans	85,062
Total loans receivable, gross	10,781,852	$ 8,808,674
Revolving loans converted to term loans during the period	17,200
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 September 30, 2020	1,198,169
2019	1,160,299
2018	651,139
2017	477,746
2016	370,588
Prior	1,665,331
Revolving loans	548,068
Revolving loans converted to term loans	43,477
Total loans receivable, gross	6,114,817	5,336,177
Personal banking | Residential mortgage loans
Credit quality indicators
Year to date September 30, 2020	533,214
2019	460,757
2018	259,239
2017	278,476
2016	234,485
Prior	1,377,198
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	3,143,369	2,868,127
Personal banking | Residential mortgage loans | Pass
Credit quality indicators
Year to date September 30, 2020	533,214
2019	460,757
2018	258,525
2017	277,416
2016	233,974
Prior	1,353,556
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	3,117,442
Personal banking | Residential mortgage loans | Substandard
Credit quality indicators
Year to date September 30, 2020	0
2019	0
2018	714
2017	1,060
2016	511
Prior	23,642
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	25,927
Personal banking | Home equity loans
Credit quality indicators
Year to date September 30, 2020	215,458
2019	211,116
2018	104,044
2017	96,373
2016	88,946
Prior	245,190
Revolving loans	482,115
Revolving loans converted to term loans	41,123
Total loans receivable, gross	1,484,365	1,342,918
Personal banking | Home equity loans | Pass
Credit quality indicators
Year to date September 30, 2020	215,458
2019	210,955
2018	103,761
2017	96,142
2016	88,061
Prior	239,862
Revolving loans	478,598
Revolving loans converted to term loans	39,082
Total loans receivable, gross	1,471,919
Personal banking | Home equity loans | Substandard
Credit quality indicators
Year to date September 30, 2020	0
2019	161
2018	283
2017	231
2016	885
Prior	5,328
Revolving loans	3,517
Revolving loans converted to term loans	2,041
Total loans receivable, gross	12,446
Personal banking | Vehicle loans
Credit quality indicators
Year to date September 30, 2020	339,243
2019	394,881
2018	248,339
2017	82,923
2016	38,118
Prior	29,336
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	1,132,840	861,192
Personal banking | Vehicle loans | Pass
Credit quality indicators
Year to date September 30, 2020	339,078
2019	392,873
2018	246,281
2017	81,517
2016	37,416
Prior	28,701
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	1,125,866
Personal banking | Vehicle loans | Substandard
Credit quality indicators
Year to date September 30, 2020	165
2019	2,008
2018	2,058
2017	1,406
2016	702
Prior	635
Revolving loans	0
Revolving loans converted to term loans	0
Total loans receivable, gross	6,974
Personal banking | Consumer loans
Credit quality indicators
Year to date September 30, 2020	110,254
2019	93,545
2018	39,517
2017	19,974
2016	9,039
Prior	13,607
Revolving loans	65,953
Revolving loans converted to term loans	2,354
Total loans receivable, gross	354,243	263,940
Personal banking | Consumer loans | Pass
Credit quality indicators
Year to date September 30, 2020	110,146
2019	93,152
2018	39,398
2017	19,837
2016	8,990
Prior	13,010
Revolving loans	65,388
Revolving loans converted to term loans	2,322
Total loans receivable, gross	352,243
Personal banking | Consumer loans | Substandard
Credit quality indicators
Year to date September 30, 2020	108
2019	393
2018	119
2017	137
2016	49
Prior	597
Revolving loans	565
Revolving loans converted to term loans	32
Total loans receivable, gross	2,000
Commercial banking
Credit quality indicators
Year to date September 30, 2020	929,145
2019	698,032
2018	585,677
2017	536,036
2016	377,613
Prior	1,102,245
Revolving loans	396,702
Revolving loans converted to term loans	41,585
Total loans receivable, gross	4,667,035	3,472,497
Commercial banking | Commercial real estate loans
Credit quality indicators
Year to date September 30, 2020	315,169
2019	478,950
2018	410,500
2017	366,322
2016	246,610
Prior	893,741
Revolving loans	40,937
Revolving loans converted to term loans	15,659
Total loans receivable, gross	2,767,888	2,228,109
Commercial banking | Commercial real estate loans | Pass
Credit quality indicators
Year to date September 30, 2020	280,895
2019	473,395
2018	336,430
2017	281,719
2016	208,590
Prior	751,165
Revolving loans	37,879
Revolving loans converted to term loans	12,005
Total loans receivable, gross	2,382,078
Commercial banking | Commercial real estate loans | Special mention
Credit quality indicators
Year to date September 30, 2020	637
2019	4,429
2018	14,314
2017	35,233
2016	17,234
Prior	8,964
Revolving loans	862
Revolving loans converted to term loans	856
Total loans receivable, gross	82,529
Commercial banking | Commercial real estate loans | Substandard
Credit quality indicators
Year to date September 30, 2020	33,637
2019	1,126
2018	59,756
2017	49,370
2016	20,786
Prior	133,612
Revolving loans	2,196
Revolving loans converted to term loans	2,798
Total loans receivable, gross	303,281
Commercial banking | Commercial real estate loans - owner occupied
Credit quality indicators
Year to date September 30, 2020	19,864
2019	100,565
2018	103,873
2017	99,850
2016	65,884
Prior	147,925
Revolving loans	11,746
Revolving loans converted to term loans	2,148
Total loans receivable, gross	551,855	526,281
Commercial banking | Commercial real estate loans - owner occupied | Pass
Credit quality indicators
Year to date September 30, 2020	19,864
2019	76,063
2018	97,694
2017	85,894
2016	57,933
Prior	122,450
Revolving loans	6,905
Revolving loans converted to term loans	1,730
Total loans receivable, gross	468,533
Commercial banking | Commercial real estate loans - owner occupied | Special mention
Credit quality indicators
Year to date September 30, 2020	0
2019	6,217
2018	5,280
2017	862
2016	3,888
Prior	7,740
Revolving loans	3,557
Revolving loans converted to term loans	0
Total loans receivable, gross	27,544
Commercial banking | Commercial real estate loans - owner occupied | Substandard
Credit quality indicators
Year to date September 30, 2020	0
2019	18,285
2018	899
2017	13,094
2016	4,063
Prior	17,735
Revolving loans	1,284
Revolving loans converted to term loans	418
Total loans receivable, gross	55,778
Commercial banking | Commercial loans
Credit quality indicators
Year to date September 30, 2020	594,112
2019	118,517
2018	71,304
2017	69,864
2016	65,119
Prior	60,579
Revolving loans	344,019
Revolving loans converted to term loans	23,778
Total loans receivable, gross	1,347,292	718,107
Commercial banking | Commercial loans | Pass
Credit quality indicators
Year to date September 30, 2020	587,698
2019	114,419
2018	65,990
2017	66,647
2016	57,539
Prior	52,649
Revolving loans	294,346
Revolving loans converted to term loans	15,967
Total loans receivable, gross	1,255,255
Commercial banking | Commercial loans | Special mention
Credit quality indicators
Year to date September 30, 2020	5,003
2019	1,228
2018	1,547
2017	2,063
2016	6,300
Prior	170
Revolving loans	24,320
Revolving loans converted to term loans	0
Total loans receivable, gross	40,631
Commercial banking | Commercial loans | Substandard
Credit quality indicators
Year to date September 30, 2020	1,411
2019	2,870
2018	3,767
2017	1,154
2016	1,280
Prior	7,760
Revolving loans	25,353
Revolving loans converted to term loans	7,811
Total loans receivable, gross	51,406
Originated
Credit quality indicators
Total loans receivable, gross	8,842,877	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	5,206,418	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	2,794,489	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	1,169,709	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	960,178	850,804
Originated | Personal banking | Consumer loans
Credit quality indicators
Total loans receivable, gross	282,042	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	3,636,459	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	2,123,387	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	365,580	433,099
Originated | Commercial banking | Commercial loans
Credit quality indicators
Total loans receivable, gross	1,147,492	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	1,938,975	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	908,399	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	348,880	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	314,656	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	172,662	10,388
Acquired | Personal banking | Consumer loans
Credit quality indicators
Total loans receivable, gross	72,201	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	1,030,576	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	644,501	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	186,275	93,182
Acquired | Commercial banking | Commercial loans
Credit quality indicators
Total loans receivable, gross	199,800	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
Minimum | Special mention and substandard
Credit quality indicators
Total loans receivable, gross	$ 1,000

Loans Receivable - Purchased Lo

Loans Receivable - Purchased Loans with Deterioration of Credit Quality (Details) $ in Thousands	9 Months Ended
	Sep. 30, 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 - Compositio_2

Loans Receivable - Composition of Acquired Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			$ 105,993
Average recorded investment in impaired loans			88,643
Interest income recognized	$ 186	$ 574	3,070
Personal banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			33,918
Average recorded investment in impaired loans			32,180
Interest income recognized			1,235
Personal banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			21,293
Average recorded investment in impaired loans			19,767
Interest income recognized			688
Personal banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			8,399
Average recorded investment in impaired loans			8,571
Interest income recognized			368
Personal banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			4,226
Average recorded investment in impaired loans			3,842
Interest income recognized			179
Commercial banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			72,075
Average recorded investment in impaired loans			56,463
Interest income recognized			1,835
Commercial banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			46,126
Average recorded investment in impaired loans			46,284
Interest income recognized			1,490
Commercial banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			25,949
Average recorded investment in impaired loans			10,179
Interest income recognized			345
Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			4,975
Outstanding principal balance			7,187
Related impairment reserve			40
Average recorded investment in impaired loans			5,332
Interest income recognized			551
Acquired loans evaluated individually for future credit losses | Personal banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			1,464
Outstanding principal balance			2,835
Related impairment reserve			33
Average recorded investment in impaired loans			1,745
Interest income recognized			273
Acquired loans evaluated individually for future credit losses | Personal banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			742
Outstanding principal balance			1,232
Related impairment reserve			7
Average recorded investment in impaired loans			866
Interest income recognized			147
Acquired loans evaluated individually for future credit losses | Personal banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			715
Outstanding principal balance			1,569
Related impairment reserve			25
Average recorded investment in impaired loans			861
Interest income recognized			114
Acquired loans evaluated individually for future credit losses | Personal banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			7
Outstanding principal balance			34
Related impairment reserve			1
Average recorded investment in impaired loans			18
Interest income recognized			12
Acquired loans evaluated individually for future credit losses | Commercial banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			3,511
Outstanding principal balance			4,352
Related impairment reserve			7
Average recorded investment in impaired loans			3,587
Interest income recognized			278
Acquired loans evaluated individually for future credit losses | Commercial banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			3,433
Outstanding principal balance			4,268
Related impairment reserve			6
Average recorded investment in impaired loans			3,509
Interest income recognized			273
Acquired loans evaluated individually for future credit losses | Commercial banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value			78
Outstanding principal balance			84
Related impairment reserve			1
Average recorded investment in impaired loans			78
Interest income recognized			$ 5

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Amortizable intangible assets:
Intangible asset - net	$ 21,601		$ 21,601		$ 23,076
Estimated amortization expense
Amortization expense	1,781	$ 1,702	5,192	$ 4,909
For the year ending December 31, 2020	6,856		6,856
For the year ending December 31, 2021	5,902		5,902
For the year ending December 31, 2022	4,681		4,681
For the year ending December 31, 2023	3,592		3,592
For the year ending December 31, 2024	2,692		2,692
For the year ending December 31, 2025	1,819		1,819
Core deposits
Amortizable intangible assets:
Intangible asset - gross	71,183		71,183		71,183
Less: accumulated amortization	(55,448)		(55,448)		(50,934)
Intangible asset - net	19,452		19,452		20,249
Core deposits | Mutual first financial, Inc.
Amortizable intangible assets:
Intangible asset - gross	3,717		3,717		0
Customer and contract
Amortizable intangible assets:
Intangible asset - gross	12,775		12,775		12,775
Less: accumulated amortization	(10,626)		(10,626)		(9,948)
Intangible asset - net	$ 2,149		$ 2,149		$ 2,827

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 346,103	$ 307,420
Goodwill acquired	39,941	38,683
Balance at the end of the period	$ 386,044	$ 346,103

Borrowed Funds - Schedule of Bo

Borrowed Funds - Schedule of Borrowed Funds (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Borrowed funds	$ 398,216	$ 246,336
Term notes payable to the Federal Home Loan Bank (FHBLB)
Debt Instrument [Line Items]
Borrowed funds	$ 148,107
Term notes payable to the Federal Home Loan Bank (FHBLB) | FHLB of Pittsburgh
Debt Instrument [Line Items]
Average rate	0.40%
Borrowed funds	$ 30,000
Term notes payable to the Federal Home Loan Bank (FHBLB) | FHLB of Indianapolis
Debt Instrument [Line Items]
Average rate	1.70%
Borrowed funds	$ 118,107
Collateralized borrowings
Debt Instrument [Line Items]
Average rate	0.19%
Borrowed funds	$ 126,832	$ 92,700
Subordinated debentures
Debt Instrument [Line Items]
Average rate	4.00%
Borrowed funds	$ 123,277

Borrowed Funds - Narrative (Det

Borrowed Funds - Narrative (Details)	Sep. 09, 2020USD ($)	Sep. 30, 2020USD ($)	Apr. 24, 2020businessTrust	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Borrowed funds		$ 398,216,000		$ 246,336,000
Number of statutory business trusts owned | businessTrust			5
Number of statutory business trusts owned after merger | businessTrust			2
Line of credit | FHLB of Pittsburgh
Debt Instrument [Line Items]
Maximum borrowing capacity		250,000,000
Revolving line of credit		0		153,600,000
Collateralized borrowings
Debt Instrument [Line Items]
Borrowed funds		126,832,000		$ 92,700,000
Subordinated debentures
Debt Instrument [Line Items]
Borrowed funds		$ 123,277,000
Debt issued	$ 125,000,000
Stated rate	4.00%
Debt issuance costs	$ 1,800,000
Debt issuance amortization period	5 years
SOFR | Subordinated debentures
Debt Instrument [Line Items]
Basis spread on variable rate	3.89%
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 - Debt Securitie

Borrowed Funds - Debt Securities Held-to-maturity on Preferred Securities and Junior Subordinated Debt Held by Trust (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Junior subordinated debentures	$ 128,729	$ 121,800
Trust Preferred Investments
Debt Instrument [Line Items]
Junior subordinated debentures	$ 128,729
Trust Preferred Investments | Northwest Bancorp Capital Trust III
Debt Instrument [Line Items]
Interest rate	1.38%
Trust preferred securities	$ 50,000
Junior subordinated debentures	$ 51,547
Trust Preferred Investments | Northwest Bancorp Statutory Trust IV
Debt Instrument [Line Items]
Interest rate	1.38%
Trust preferred securities	$ 50,000
Junior subordinated debentures	$ 51,547
Trust Preferred Investments | LNB Trust II
Debt Instrument [Line Items]
Interest rate	1.48%
Trust preferred securities	$ 7,875
Junior subordinated debentures	$ 8,119
Trust Preferred Investments | Union National Capital Trust I
Debt Instrument [Line Items]
Interest rate	2.85%
Trust preferred securities	$ 8,000
Junior subordinated debentures	$ 7,919
Trust Preferred Investments | Union National Capital Trust II
Debt Instrument [Line Items]
Interest rate	2.00%
Trust preferred securities	$ 3,000
Junior subordinated debentures	$ 2,707
Trust Preferred Investments | MFBC Statutory Trust I
Debt Instrument [Line Items]
Interest rate	1.70%
Trust preferred securities	$ 5,000
Junior subordinated debentures	$ 3,450
Trust Preferred Investments | Universal Preferred Trust
Debt Instrument [Line Items]
Interest rate	1.69%
Trust preferred securities	$ 5,000
Junior subordinated debentures	$ 3,440

Guarantees (Details)

Guarantees (Details) - Letter of credit $ in Thousands	Sep. 30, 2020USD ($)
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 44,100
Maximum exposure collateralized	39,700
Liability recognized for the obligations	$ 449

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - Stock options - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive securities excluded from the calculation of earnings per share
Antidilutive securities not included in the computation of diluted earnings per share (in shares)	4,828,192		4,828,192
Average share price during the reporting period (in dollars per share)	$ 9.88	$ 16.69	$ 11.59	$ 17.19

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 38,050	$ 33,414	$ 39,789	$ 84,841
Weighted average common shares outstanding (in shares)	126,855,810	105,517,707	118,088,122	104,626,560
Dilutive potential shares due to effect of stock options (in shares)	0	752,837	0	1,055,055
Total weighted average common shares and dilutive potential shares (in shares)	126,855,810	106,270,544	118,088,122	105,681,615
Basic earnings per share (in dollars per share)	$ 0.30	$ 0.32	$ 0.34	$ 0.81
Diluted earnings per share (in dollars per share)	$ 0.30	$ 0.31	$ 0.34	$ 0.80

Pension and Other Post-Retire_3

Pension and Other Post-Retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension benefits
Components of net periodic benefit cost
Service cost	$ 2,097	$ 1,487	$ 6,293	$ 4,462
Interest cost	1,713	1,839	5,141	5,515
Expected return on plan assets	(3,090)	(2,759)	(9,272)	(8,278)
Amortization of prior service cost	(580)	(581)	(1,742)	(1,742)
Amortization of the net loss	925	856	2,773	2,568
Net periodic cost	1,065	842	3,193	2,525
Pension benefits | Minimum
Components of net periodic benefit cost
Estimated contribution for the current year	2,000		2,000
Pension benefits | Maximum
Components of net periodic benefit cost
Estimated contribution for the current year	4,000		4,000
Other post-retirement benefits
Components of net periodic benefit cost
Service cost	0	0	0	0
Interest cost	7	13	20	39
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of the net loss	4	17	13	51
Net periodic cost	$ 11	$ 30	$ 33	$ 90

Disclosures About Fair Value _3

Disclosures About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Significant unrealized appreciation or depreciation in financial instruments	$ 0	$ 0
Financial assets:
Securities available-for-sale	1,409,150,000	819,901,000
Securities held-to-maturity	16,168,000	18,223,000
Accrued interest receivable	36,916,000	25,755,000
Derivative assets	70,208,000	21,593,000
Financial liabilities:
Junior subordinated debentures	128,729,000	121,800,000
Derivative liabilities	61,918,000	20,991,000
Level 1
Financial assets:
Cash and cash equivalents	656,749,000	60,846,000
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	36,916,000	25,755,000
FHLB stock	0	0
Total financial assets	693,665,000	86,601,000
Financial liabilities:
Savings and checking deposits	9,724,597,000	7,022,597,000
Time deposits	0	0
Borrowed funds	276,733,000	246,341,000
Junior subordinated debentures	0	0
Accrued interest payable	1,002,000	1,142,000
Total financial liabilities	10,002,332,000	7,270,080,000
Level 1 | Interest rate lock commitments
Financial assets:
Derivative assets	0	0
Level 1 | Forward commitments
Financial assets:
Derivative assets	0	0
Level 1 | Interest rate swaps
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities		0
Level 1 | Interest rate swaps | Derivatives not designated as hedging instruments
Financial liabilities:
Derivative liabilities	0
Level 1 | Risk participation agreements
Financial liabilities:
Derivative liabilities	0	0
Level 2
Financial assets:
Cash and cash equivalents	0	0
Securities available-for-sale	1,409,150,000	819,901,000
Securities held-to-maturity	16,168,000	18,223,000
Loans receivable, net	0	0
Residential mortgage loans held-for-sale	0	0
Accrued interest receivable	0	0
FHLB stock	0	0
Total financial assets	1,487,318,000	859,158,000
Financial liabilities:
Savings and checking deposits	0	0
Time deposits	0	0
Borrowed funds	121,513,000	0
Junior subordinated debentures	0	0
Accrued interest payable	0	0
Total financial liabilities	183,431,000	20,991,000
Level 2 | Interest rate lock commitments
Financial assets:
Derivative assets	0	0
Level 2 | Forward commitments
Financial assets:
Derivative assets	1,059,000	145,000
Level 2 | Interest rate swaps
Financial assets:
Derivative assets	60,941,000	20,889,000
Financial liabilities:
Derivative liabilities		20,952,000
Level 2 | Interest rate swaps | Derivatives not designated as hedging instruments
Financial liabilities:
Derivative liabilities	61,694,000
Level 2 | Risk participation agreements
Financial liabilities:
Derivative liabilities	224,000	39,000
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	10,644,954,000	8,666,149,000
Residential mortgage loans held-for-sale	25,140,000	7,709,000
Accrued interest receivable	0	0
FHLB stock	0	0
Total financial assets	10,678,302,000	8,674,417,000
Financial liabilities:
Savings and checking deposits	0	0
Time deposits	1,762,167,000	1,574,063,000
Borrowed funds	0	0
Junior subordinated debentures	130,233,000	115,518,000
Accrued interest payable	0	0
Total financial liabilities	1,892,400,000	1,689,581,000
Level 3 | Interest rate lock commitments
Financial assets:
Derivative assets	8,208,000	559,000
Level 3 | Forward commitments
Financial assets:
Derivative assets	0	0
Level 3 | Interest rate swaps
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities		0
Level 3 | Interest rate swaps | Derivatives not designated as hedging instruments
Financial liabilities:
Derivative liabilities	0
Level 3 | Risk participation agreements
Financial liabilities:
Derivative liabilities	0	0
Carrying amount
Financial assets:
Cash and cash equivalents	656,749,000	60,846,000
Securities available-for-sale	1,409,150,000	819,901,000
Securities held-to-maturity	15,333,000	18,036,000
Loans receivable, net	10,616,503,000	8,743,024,000
Residential mortgage loans held-for-sale	25,140,000	7,709,000
Accrued interest receivable	36,916,000	25,755,000
FHLB stock	23,171,000	14,740,000
Total financial assets	12,853,170,000	9,711,604,000
Financial liabilities:
Savings and checking deposits	9,724,597,000	7,022,597,000
Time deposits	1,732,022,000	1,569,410,000
Borrowed funds	398,216,000	246,336,000
Junior subordinated debentures	128,729,000	121,800,000
Accrued interest payable	1,002,000	1,142,000
Total financial liabilities	12,046,484,000	8,982,276,000
Carrying amount | Interest rate lock commitments
Financial assets:
Derivative assets	8,208,000	559,000
Carrying amount | Forward commitments
Financial assets:
Derivative assets	1,059,000	145,000
Carrying amount | Interest rate swaps
Financial assets:
Derivative assets	60,941,000	20,889,000
Financial liabilities:
Derivative liabilities		20,952,000
Carrying amount | Interest rate swaps | Derivatives not designated as hedging instruments
Financial liabilities:
Derivative liabilities	61,694,000
Carrying amount | Risk participation agreements
Financial liabilities:
Derivative liabilities	224,000	39,000
Estimated fair value
Financial assets:
Cash and cash equivalents	656,749,000	60,846,000
Securities available-for-sale	1,409,150,000	819,901,000
Securities held-to-maturity	16,168,000	18,223,000
Loans receivable, net	10,644,954,000	8,666,149,000
Residential mortgage loans held-for-sale	25,140,000	7,709,000
Accrued interest receivable	36,916,000	25,755,000
FHLB stock	23,171,000	14,740,000
Total financial assets	12,882,456,000	9,634,916,000
Financial liabilities:
Savings and checking deposits	9,724,597,000	7,022,597,000
Time deposits	1,762,167,000	1,574,063,000
Borrowed funds	398,246,000	246,341,000
Junior subordinated debentures	130,233,000	115,518,000
Accrued interest payable	1,002,000	1,142,000
Total financial liabilities	12,078,163,000	8,980,652,000
Estimated fair value | Interest rate lock commitments
Financial assets:
Derivative assets	8,208,000	559,000
Estimated fair value | Forward commitments
Financial assets:
Derivative assets	1,059,000	145,000
Estimated fair value | Interest rate swaps
Financial assets:
Derivative assets	60,941,000	20,889,000
Financial liabilities:
Derivative liabilities		20,952,000
Estimated fair value | Interest rate swaps | Derivatives not designated as hedging instruments
Financial liabilities:
Derivative liabilities	61,694,000
Estimated fair value | Risk participation agreements
Financial liabilities:
Derivative liabilities	$ 224,000	$ 39,000

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	Sep. 30, 2020	Dec. 31, 2019
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	$ 1,409,150	$ 819,901
Derivative assets	70,208	21,593
Derivative liabilities	61,918	20,991
Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total financial assets	693,665	86,601
Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	1,409,150	819,901
Total financial assets	1,487,318	859,158
Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total financial assets	10,678,302	8,674,417
Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	254,097	146,742
Total mortgage-backed securities	1,171,221	673,159
Derivative assets		20,889
Total financial assets	1,495,526	841,494
Total liabilities	61,918	20,991
Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total mortgage-backed securities	0	0
Derivative assets		0
Total financial assets	0	0
Total liabilities	0	0
Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	254,097	146,742
Total mortgage-backed securities	1,171,221	673,159
Derivative assets		20,889
Total financial assets	1,487,318	840,935
Total liabilities	61,918	20,991
Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total mortgage-backed securities	0	0
Derivative assets		0
Total financial assets	8,208	559
Total liabilities	0	0
U.S. government and agencies | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	34,176	14,991
U.S. government and agencies | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
U.S. government and agencies | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	34,176	14,991
U.S. government and agencies | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Government sponsored enterprises | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	105,399	104,784
Government sponsored enterprises | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Government sponsored enterprises | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	105,399	104,784
Government sponsored enterprises | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
States and political subdivisions | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	114,522	26,048
States and political subdivisions | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
States and political subdivisions | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	114,522	26,048
States and political subdivisions | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Corporate | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		919
Corporate | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		0
Corporate | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		919
Corporate | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale		0
GNMA | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	25,964	23,264
Collateralized mortgage-backed securities	336,896	207,016
GNMA | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
GNMA | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	25,964	23,264
Collateralized mortgage-backed securities	336,896	207,016
GNMA | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
FNMA | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	212,314	89,259
Collateralized mortgage-backed securities	250,637	184,682
FNMA | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
FNMA | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	212,314	89,259
Collateralized mortgage-backed securities	250,637	184,682
FNMA | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
FHLMC | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	143,783	50,139
Collateralized mortgage-backed securities	201,153	118,302
FHLMC | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
FHLMC | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	143,783	50,139
Collateralized mortgage-backed securities	201,153	118,302
FHLMC | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Collateralized mortgage-backed securities	0	0
Non-agency | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	474	497
Non-agency | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Non-agency | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	474	497
Non-agency | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities	0	0
Interest rate lock commitments | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate lock commitments | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate lock commitments | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	8,208	559
Interest rate lock commitments | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	8,208	559
Interest rate lock commitments | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate lock commitments | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate lock commitments | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	8,208	559
Forward commitments | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Forward commitments | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	1,059	145
Forward commitments | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Forward commitments | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	1,059	145
Forward commitments | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Forward commitments | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	1,059	145
Forward commitments | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate swaps | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Derivative liabilities		0
Interest rate swaps | Level 1 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	0
Interest rate swaps | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	60,941	20,889
Derivative liabilities		20,952
Interest rate swaps | Level 2 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	61,694
Interest rate swaps | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0	0
Derivative liabilities		0
Interest rate swaps | Level 3 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	0
Interest rate swaps | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities		20,952
Interest rate swaps | Measured on recurring basis | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	60,941
Derivative liabilities	61,694
Interest rate swaps | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities		0
Interest rate swaps | Measured on recurring basis | Level 1 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0
Derivative liabilities	0
Interest rate swaps | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities		20,952
Interest rate swaps | Measured on recurring basis | Level 2 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	60,941
Derivative liabilities	61,694
Interest rate swaps | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities		0
Interest rate swaps | Measured on recurring basis | Level 3 | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value on a recurring basis
Derivative assets	0
Derivative liabilities	0
Risk participation agreements | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	0	0
Risk participation agreements | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	224	39
Risk participation agreements | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	0	0
Risk participation agreements | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	224	39
Risk participation agreements | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	0	0
Risk participation agreements | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	224	39
Risk participation agreements | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Derivative liabilities	$ 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 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance	$ 7,416	$ 0	$ 559	$ 0
Total gains or losses:
Included in net income	0	0	0	0
Included in other comprehensive income	0	0	0	0
Interest rate lock commitments:
Net activity	792	505	7,649	505
Transfers from Level 3	0	0	0	0
Transfers into Level 3	0	0	0	0
Ending balance	$ 8,208	$ 505	$ 8,208	$ 505

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	Sep. 30, 2020	Dec. 31, 2019
Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	$ 0	$ 0
Total financial assets	693,665	86,601
Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	0	0
Total financial assets	1,487,318	859,158
Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	10,644,954	8,666,149
Total financial assets	10,678,302	8,674,417
Fair value measurements nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Real estate owned, net	2,575	950
Total financial assets	55,852	47,188
Fair value measurements nonrecurring | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Real estate owned, net	0	0
Total financial assets	0	0
Fair value measurements nonrecurring | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Real estate owned, net	0	0
Total financial assets	0	0
Fair value measurements nonrecurring | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Real estate owned, net	2,575	950
Total financial assets	55,852	47,188
Impaired loans | Fair value measurements nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	53,277	46,238
Impaired loans | Fair value measurements nonrecurring | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	0	0
Impaired loans | Fair value measurements nonrecurring | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	0	0
Impaired loans | Fair value measurements nonrecurring | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans individually assessed	$ 53,277	$ 46,238

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	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Estimated cost to sell | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.100
Estimated cost to sell | Real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell	0.100
Discount rate | Impaired loans | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.0600
Discount rate | Impaired loans | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.198
Discount rate | Impaired loans | Discounted cash flow | Weighted average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.1424
Fair value measurements nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate owned, net	$ 2,575	$ 950
Impaired loans | Fair value measurements nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans individually assessed	$ 53,277	$ 46,238

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) - Derivatives designated as hedging instruments	1 Months Ended	9 Months Ended
	Mar. 31, 2020USD ($)derivative	Sep. 30, 2020USD ($)
Derivative [Line Items]
Cash flow hedges reclassification for discontinued		$ 1,300,000
Interest rate swaps
Derivative [Line Items]
Number of derivatives | derivative	4
Derivative, Notional Amount	$ 100,000,000
Interest rate swaps | Minimum
Derivative [Line Items]
Derivative contract maturities	3 years
Interest rate swaps | Maximum
Derivative [Line Items]
Derivative contract maturities	5 years

Derivative Financial Instrume_4

Derivative Financial Instruments - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Asset derivatives, notional amount	$ 774,115	$ 421,026
Derivative assets, fair value	70,208	21,593
Liability derivatives, notional amount	631,231	432,666
Liability derivatives, fair value	61,918	20,991
Derivatives not designated as hedging instruments | Interest rate swaps
Derivative [Line Items]
Asset derivatives, notional amount	553,699	391,502
Derivative assets, fair value	60,941	20,889
Liability derivatives, notional amount	553,699	391,502
Liability derivatives, fair value	61,694	20,952
Derivatives not designated as hedging instruments | Interest rate lock commitments
Derivative [Line Items]
Asset derivatives, notional amount	196,335	24,373
Derivative assets, fair value	8,208	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	24,081	5,151
Derivative assets, fair value	1,059	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	$ 224	$ 39

Derivative Financial Instrume_5

Derivative Financial Instruments - Gain (Loss) on Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Hedging derivatives:
Increase/(decrease) in interest expense	$ 67	$ 0	$ (35)	$ 0
Decrease in other income
Non-hedging swap derivatives:
Decrease in other income	(353)	(125)	(875)	(195)
Increase in mortgage banking income
Non-hedging swap derivatives:
Decrease in other income	$ 315	$ 720	$ 8,563	$ 720

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Changes in accumulated other comprehensive income by component
Balance beginning of the period	$ 1,530,849	$ 1,333,588	$ 1,353,285	$ 1,257,638
Other comprehensive income before reclassification adjustments	676	1,315	12,677	11,376
Amounts reclassified from accumulated other comprehensive income	1,195	207	1,695	623
Other comprehensive income	1,871	1,522	14,372	11,999
Balance end of the period	1,547,231	1,351,770	1,547,231	1,351,770
Unrealized holding gains (losses), tax	107	525	5,286	4,549
Unrealized holding losses on interest rate swaps, tax	0	0	(209)	0
Realized gain on securities (gain on sales of investments, net)	2	1	1	(4)
Reclassification adjustment for gains included in net income, tax	(1)	0	0	(1)
Reclassification adjustment for losses included in net income, tax	375	0	375	0
Reclassification adjustment for prior period service costs included in net income, net of tax	580	581	1,741	1,742
Reclassification adjustment for defined benefit plan loss included in net income, net of tax	(929)	(871)	(2,786)	(2,618)
Reclassification adjustment for prior period service costs included in net income, tax	(99)	(83)	(297)	(250)
Unrealized  gains/(losses)  on securities  available-for-sale
Changes in accumulated other comprehensive income by component
Balance beginning of the period	16,096	3,227	3,147	(6,832)
Other comprehensive income before reclassification adjustments	676	1,315	13,623	11,376
Amounts reclassified from accumulated other comprehensive income	(1)	(1)	1	(3)
Other comprehensive income	675	1,314	13,624	11,373
Balance end of the period	16,771	4,541	16,771	4,541
Change in  fair value  of interest  rate swaps
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(946)	0	0	0
Other comprehensive income before reclassification adjustments	0	0	(946)	0
Amounts reclassified from accumulated other comprehensive income	946	0	946	0
Other comprehensive income	946	0	0	0
Balance end of the period	0	0	0	0
Change in  defined benefit  pension plans
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(39,590)	(32,446)	(40,088)	(32,864)
Other comprehensive income before reclassification adjustments	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	250	208	748	626
Other comprehensive income	250	208	748	626
Balance end of the period	(39,340)	(32,238)	(39,340)	(32,238)
Total
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(24,440)	(29,219)	(36,941)	(39,696)
Other comprehensive income	1,871	1,522	14,372	11,999
Balance end of the period	$ (22,569)	$ (27,697)	$ (22,569)	$ (27,697)