Northwest Bancshares (NWBI) 10-Q 8 Aug 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
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 (in shares)		106,642,928
Entity Central Index Key	0001471265
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 106,988	$ 68,789
Marketable securities available-for-sale (amortized cost of $850,248 and $811,015)	854,765	801,450
Marketable securities held-to-maturity (fair value of $20,676 and $22,446)	20,414	22,765
Total cash and cash equivalents and marketable securities	982,167	893,004
Total loans	8,736,882	8,051,439
Allowance for loan losses	(53,107)	(55,214)
Total loans, net	8,683,775	7,996,225
Federal Home Loan Bank stock, at cost	14,966	15,635
Accrued interest receivable	28,742	24,490
Real estate owned, net	2,070	2,498
Premises and equipment, net	148,973	143,390
Bank-owned life insurance	186,870	171,079
Goodwill	344,720	307,420
Other intangible assets	24,112	19,821
Other assets	89,088	34,211
Total assets	10,505,483	9,607,773
Liabilities:
Noninterest-bearing demand deposits	1,944,550	1,736,156
Interest-bearing demand deposits	1,670,983	1,455,460
Money market deposit accounts	1,784,437	1,661,623
Savings deposits	1,683,551	1,636,099
Time deposits	1,600,372	1,404,841
Total deposits	8,683,893	7,894,179
Borrowed funds	171,677	234,389
Junior subordinated debentures	121,757	111,213
Advances by borrowers for taxes and insurance	54,507	43,298
Accrued interest payable	1,207	744
Other liabilities	138,854	66,312
Total liabilities	9,171,895	8,350,135
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, 106,614,607 and 103,354,030 shares issued, respectively	1,066	1,034
Paid-in capital	798,942	745,926
Retained earnings	562,799	550,374
Accumulated other comprehensive loss	(29,219)	(39,696)
Total shareholders’ equity	1,333,588	1,257,638
Total liabilities and shareholders’ equity	10,505,483	9,607,773
Personal Banking
Assets
Total loans	5,225,535	4,982,605
Commercial Banking
Assets
Total loans	3,511,347	3,068,834
Residential mortgage loans | Personal Banking
Assets
Total loans	2,899,164	2,864,470
Home equity loans | Personal Banking
Assets
Total loans	1,314,947	1,258,422
Consumer loans | Personal Banking
Assets
Total loans	1,011,424	859,713
Commercial real estate loans | Commercial Banking
Assets
Total loans	2,808,153	2,471,821
Commercial loans | Commercial Banking
Assets
Total loans	$ 703,194	$ 597,013

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Marketable securities available-for-sale, amortized cost	$ 850,248	$ 811,015
Marketable securities held-to-maturity, fair value	$ 20,676	$ 22,446
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)	106,614,607	103,354,030

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest income
Loans receivable	$ 100,917	$ 88,106	$ 195,852	$ 173,326
Mortgage-backed securities	4,280	3,254	8,245	6,267
Taxable investment securities	898	648	1,834	1,326
Tax-free investment securities	237	313	419	703
Federal Home Loan Bank stock dividends	316	85	487	182
Interest-earning deposits	159	469	259	604
Total interest income	106,807	92,875	207,096	182,408
Interest expense
Deposits	12,484	7,309	22,629	13,767
Borrowed funds	1,720	1,340	3,882	2,648
Total interest expense	14,204	8,649	26,511	16,415
Net interest income	92,603	84,226	180,585	165,993
Provision for loan losses	4,667	5,349	11,134	9,558
Net interest income after provision for loan losses	87,936	78,877	169,451	156,435
Noninterest income:
Gain on sale of investments	29	0	23	153
Service charges and fees	13,339	12,908	25,382	24,807
Trust and other financial services income	4,444	4,050	8,639	8,081
Insurance commission income	2,145	2,090	4,323	4,839
Gain/(loss) on real estate owned, net	91	176	88	(370)
Income from bank-owned life insurance	1,197	2,333	2,202	3,323
Mortgage banking income	188	77	404	301
Other operating income	1,930	2,475	3,964	4,763
Total noninterest income	23,363	24,109	45,025	45,897
Noninterest expense
Compensation and employee benefits	42,008	39,031	80,196	75,541
Premises and occupancy costs	7,387	6,824	14,605	14,131
Office operations	3,708	3,768	6,839	7,176
Collections expense	939	434	1,247	946
Processing expenses	10,634	9,560	21,068	19,266
Marketing expenses	2,729	2,014	4,615	4,154
Federal deposit insurance premiums	681	671	1,387	1,388
Professional services	3,198	2,819	5,722	5,096
Amortization of intangible assets	1,760	1,520	3,207	3,040
Real estate owned expense	128	133	287	425
Restructuring/acquisition expense	1,105	393	3,031	393
Other expenses	3,235	2,620	6,732	5,652
Total noninterest expense	77,512	69,787	148,936	137,208
Income before income taxes	33,787	33,199	65,540	65,124
Federal and state income taxes expense	7,404	6,900	14,113	13,840
Net income	$ 26,383	$ 26,299	$ 51,427	$ 51,284
Basic earnings per share (in dollars per share)	$ 0.25	$ 0.26	$ 0.49	$ 0.50
Diluted earnings per share (in dollars per share)	$ 0.25	$ 0.25	$ 0.49	$ 0.50

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 26,383	$ 26,299	$ 51,427	$ 51,284
Net unrealized holding gains/(losses) on marketable securities:
Unrealized holding gains/(losses) net of tax of ($2,243), $494, ($4,024), and $2,081 respectively	5,608	(1,237)	10,061	(5,199)
Reclassification adjustment for gains included in net income, net of tax of $1, $30, $1 and $37, respectively	(1)	(75)	(2)	(94)
Net unrealized holding gains/(losses) on marketable securities	5,607	(1,312)	10,059	(5,293)
Change in fair value of interest rate swaps, net of tax of $0, ($58), $0 and ($153), respectively	0		0
Change in fair value of interest rate swaps, net of tax of $0, ($58), $0 and ($153), respectively		214		574
Defined benefit plan:
Reclassification adjustments for prior period service costs and net losses included in net income, net of tax of ($85), ($91), ($167) and ($181), respectively	209	226	418	452
Other comprehensive income/(loss)	5,816	(872)	10,477	(4,267)
Total comprehensive income	$ 32,199	$ 25,427	$ 61,904	$ 47,017

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Unrealized holding losses, tax	$ (2,243)	$ 494	$ (4,024)	$ 2,081
Reclassification adjustment for gains included in net income, tax	1	30	1	37
Change in fair value of interest rate swaps. tax	0		0
Change in fair value of interest rate swaps, tax		(58)		(153)
Reclassification adjustments for prior period service costs and net losses included in net income, tax	$ (85)	$ (91)	$ (167)	$ (181)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Retained earnings	Accumulated other comprehensive loss
Balance beginning of the period (in shares) at Dec. 31, 2017		102,394,828
Balance beginning of the period at Dec. 31, 2017	$ 1,207,724	$ 1,027	$ 730,719	$ 508,058	$ (32,080)
Increase (Decrease) in Stockholders' Equity
Reclassification due to adoption of ASU No. 2018-02				6,746	(6,746)
Comprehensive income:
Net income	51,284			51,284
Other comprehensive income, net	(4,267)				(4,267)
Total comprehensive income	47,017			58,030	(11,013)
Exercise of stock options (in shares)		496,429
Exercise of stock options	5,682	$ 5	5,677
Stock-based compensation expense (in shares)		414,330
Stock-based compensation expense	3,276	$ 4	3,272
Stock-based compensation forfeited (in shares)		(182,697)
Stock-based compensation forfeited	0	$ (5)	5
Dividends paid, per share amount	(34,819)			(34,819)
Balance end of period (in shares) at Jun. 30, 2018		103,122,890
Balance end of the period at Jun. 30, 2018	1,228,880	$ 1,031	739,673	531,269	(43,093)
Balance beginning of the period (in shares) at Mar. 31, 2018		102,599,662
Balance beginning of the period at Mar. 31, 2018	1,215,254	$ 1,026	734,065	522,384	(42,221)
Comprehensive income:
Net income	26,299			26,299
Other comprehensive income, net	(872)				(872)
Total comprehensive income	25,427			26,299	(872)
Exercise of stock options (in shares)		291,595
Exercise of stock options	3,315	$ 3	3,312
Stock-based compensation expense (in shares)		414,330
Stock-based compensation expense	2,298	$ 4	2,294
Stock-based compensation forfeited (in shares)		(182,697)
Stock-based compensation forfeited	0	$ (2)	2
Dividends paid, per share amount	(17,414)			(17,414)
Balance end of period (in shares) at Jun. 30, 2018		103,122,890
Balance end of the period at Jun. 30, 2018	1,228,880	$ 1,031	739,673	531,269	(43,093)
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	$ 1,034	745,926	550,374	(39,696)
Comprehensive income:
Net income	51,427			51,427
Other comprehensive income, net	10,477				10,477
Total comprehensive income	61,904			51,427	10,477
Acquisition of Union Community Bank (UCB) (in shares)		2,462,373
Acquisition of Union Community Bank (UCB)	43,288	$ 24	43,264
Exercise of stock options (in shares)		547,855
Exercise of stock options	6,025	$ 5	6,020
Stock-based compensation expense (in shares)		281,100
Stock-based compensation expense	3,735	$ 3	3,732
Stock-based compensation forfeited (in shares)		(30,751)
Stock-based compensation forfeited	0	$ 0	0
Share repurchases (in shares)		0
Share repurchases		$ 0	0
Dividends paid, per share amount	(37,776)			(37,776)
Balance end of period (in shares) at Jun. 30, 2019		106,614,607
Balance end of the period at Jun. 30, 2019	1,333,588	$ 1,066	798,942	562,799	(29,219)
Balance beginning of the period (in shares) at Mar. 31, 2019		106,220,030
Balance beginning of the period at Mar. 31, 2019	1,316,276	$ 1,062	795,044	555,205	(35,035)
Comprehensive income:
Net income	26,383			26,383
Other comprehensive income, net	5,816				5,816
Total comprehensive income	32,199			26,383	5,816
Exercise of stock options (in shares)		116,073
Exercise of stock options	1,367	$ 1	1,366
Stock-based compensation expense (in shares)		281,100
Stock-based compensation expense	2,535	$ 3	2,532
Stock-based compensation forfeited (in shares)		(2,596)
Stock-based compensation forfeited	0
Dividends paid, per share amount	(19,133)			(19,133)
Balance end of period (in shares) at Jun. 30, 2019		106,614,607
Balance end of the period at Jun. 30, 2019	$ 1,333,588	$ 1,066	$ 798,942	$ 562,799	$ (29,219)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax	$ (2,329)	$ 375	$ (4,190)	$ 1,784
Dividends paid, per share (in dollars per share)	$ 0.18	$ 0.17	$ 0.36	$ 0.34

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net income	$ 51,427	$ 51,284
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	11,134	9,558
Net loss on sale of assets	1,425	1,115
Net depreciation, amortization and accretion	1,404	6,708
Increase in other assets	(58,103)	(5,987)
Increase/(decrease) in other liabilities	68,915	(4,276)
Net amortization on marketable securities	441	898
Noncash write-down of real estate owned	337	940
Deferred income tax expense	253	22
Origination of loans held for sale	0	(1,297)
Proceeds from sale of loans held for sale	0	4,501
Noncash compensation expense related to stock benefit plans	3,735	3,276
Net cash provided by operating activities	80,968	66,742
Investing activities:
Purchase of marketable securities available-for-sale	(76,022)	(108,879)
Proceeds from maturities and principal reductions of marketable securities held-to-maturity	2,343	3,923
Proceeds from maturities and principal reductions of marketable securities available-for-sale	82,584	88,183
Proceeds from sale of marketable securities available-for-sale	32,389	5,206
Proceeds from bank-owned life insurance	2,207	0
Loan originations	(1,643,950)	(1,483,080)
Proceeds from loan maturities and principal reductions	1,359,064	1,322,618
Net proceeds of Federal Home Loan Bank stock	1,122	3,846
Proceeds from sale of real estate owned	2,480	4,415
Sale of real estate owned for investment, net	304	304
Purchase of premises and equipment	(6,518)	(1,661)
Acquisitions, net of cash received	(25,833)	0
Net cash used in investing activities	(269,830)	(165,125)
Financing activities:
Increase in deposits, net	310,335	180,389
Net decrease in short-term borrowings	(62,712)	(8,349)
Increase in advances by borrowers for taxes and insurance	11,189	10,815
Cash dividends paid	(37,776)	(34,819)
Proceeds from stock options exercised	6,025	5,682
Net cash provided by financing activities	227,061	153,718
Net increase in cash and cash equivalents	38,199	55,335
Cash and cash equivalents at beginning of period	68,789	77,710
Cash and cash equivalents at end of period	106,988	133,045
Cash paid during the period for:
Interest on deposits and borrowings (including interest credited to deposit accounts of $20,913 and $13,115, respectively)	26,048	16,307
Income taxes	10,772	9,149
Business acquisitions:
Fair value of assets acquired	580,407	0
Northwest Bancshares, Inc. common stock issued	(43,288)	0
Cash paid	(42,500)	0
Liabilities assumed	494,619	0
Non-cash activities:
Loan foreclosures and repossessions	3,338	3,599
Sale of real estate owned financed by the Company	$ 44	$ 183

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Interest on deposits and borrowings, interest credited to deposit accounts	$ 20,913	$ 13,115

Basis of Presentation and Infor

Basis of Presentation and Informational Disclosures	6 Months Ended
	Jun. 30, 2019
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 FDIC and the Pennsylvania Department of Banking. Northwest operates 182 community-banking offices throughout Pennsylvania, Western New York, and eastern Ohio. 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, and The Bert Company (doing business as Northwest Insurance Services). 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 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, 2018 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 and six months ended June 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 , or any other period. Stock-Based Compensation On May 22, 2019, the Company awarded employees 547,410 stock options and directors 64,800 stock options with an exercise price of $17.27 and grant date fair value of $1.14 per stock option, and the Company awarded employees 256,800 restricted common shares and directors 24,300 restricted common shares with a grant date fair value of $17.27 . 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 $2.5 million and $2.3 million for the quarters ended June 30, 2019 and 2018 , and $3.7 million and $3.3 million for the six months ended June 30, 2019 and 2018 , respectively, was recognized in compensation expense relating to our stock benefit plans. At June 30, 2019 , there was compensation expense of $4.1 million to be recognized for awarded but unvested stock options and $19.7 million for unvested 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 June 30, 2019 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, 2018 , 2017 , 2016 and 2015 . Recent Accounting Pronouncements (a) Recently Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842), which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Accounting Standards Codification ("ASC") Topic 842 establishes a right of use ("ROU") model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases of all classes of underlying assets that have a lease term of 12 months or less and recognizes lease expense for these leases on a straight-line basis over the term of the lease. On January 1, 2019, the Company adopted ASU 2016-02 using a modified retrospective transition approach as of the effective date, January 1, 2019. 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 lease disclosures for periods before the date of adoption (i.e. January 1, 2017). The Company has elected to adopt the package of transition practical expedients and, therefore, has not reassessed (1) whether existing or expired contracts contain a lease, (2) lease classification for existing or expired leases or (3) the accounting for initial direct costs that were previously capitalized. The Company also elected the practical expedient to use hindsight for leases existing at the adoption date. As a result of the adoption of ASU 2016-02, we recognized an operating lease ROU asset of $40.2 million , an operating lease liability of approximately $42.2 million and a cumulative-effect adjustment on retained earnings of $1.2 million on the consolidated statements of financial condition as of January 1, 2019, with no impact on our consolidated statement of income or consolidated statement of cash flows compared to the prior lease accounting model. (b) Recently Issued Accounting Standards In June 2016, the FASB issued ASU 2016-13, " Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments" , which eliminates 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. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets in order to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The income statement under this guidance will reflect the initial recognition of current expected credit losses for newly recognized assets, as well as any increases or decreases of expected credit losses that have occurred during the period. This guidance retains many currently-existing disclosures related to the credit quality of an entity’s assets and the related allowance for credit losses amended to reflect the change to an expected credit loss methodology, as well as enhanced disclosures to provide information to users at a more disaggregated level. Upon adoption, ASU 2016-13 provides for a modified retrospective transition by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is effective, except for debt securities for which other-than-temporary impairment has previously been recognized. For these debt securities, a prospective transition is provided in order to maintain the same amortized cost prior to and subsequent to the effective date of the ASU. This guidance is effective for annual reporting periods beginning after December 15, 2019, and interim periods within those annual periods with early adoption permitted for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. Management has created a formal working group to govern the implementation of these amendments, consisting of key stakeholders from finance, risk, credit and accounting. We are currently in the process of designing current expected credit loss estimation methodologies and systems, and collecting data to be able to comply with the standard. We have engaged with a third party to assist in the development of certain portfolio-level estimation methodologies and have chosen a third-party software platform provider. We are also evaluating the effect this guidance will have on our results of operations, financial position and related disclosures. The impact of the ASU will depend upon the state of the economy and the nature of our portfolios, among other items, at the date of adoption. 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. This guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those years, with early adoption permitted for any removed or modified disclosure requirements. Transition is on a prospective basis for the new and modified disclosures, and on a retrospective basis for disclosures that have been eliminated. We do not expect this guidance to have a material impact on our financial statements. In August 2018, the FASB issued ASU 2018-14, “ Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20) - Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans.” This guidance removes and adds disclosure requirements for defined benefit pension or other post-retirement plans. This guidance is effective for annual periods beginning after December 15, 2020, with early adoption permitted, and requires retrospective adoption for all periods presented. We do not expect this guidance to have a material impact on our financial statements. 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. This guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those years, with early adoption permitted. Transition can either be on a retrospective basis or a prospective basis on all implementation costs incurred after the date of adoption. We are evaluating the impact this new accounting guidance will have on our financial statements.

Acquisition

Acquisition	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisition	Acquisition On March 8, 2019, the Company completed the merger with Donegal Financial Services Corporation ("DFSC"), the holding company for Union Community Bank ("UCB"), for total consideration of $85.8 million . The transaction has expanded Northwest’s franchise by 12 offices in Lancaster County in eastern Pennsylvania. The result of UCB's operations are included in the Consolidated Statements of Income from the date of acquisition. Under the terms of the merger agreement, the two shareholders of DFSC, Donegal Mutual Insurance Company and Donegal Group Inc., received payment in the form of 50% cash and 50% stock, or a total of $42.5 million and 2,462,373 shares of common stock of the Company, valued at $43.3 million , based on the $17.58 closing price of the Company's stock on March 8, 2019. 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 $ 43,288 Cash paid to DFSC 42,500 Total consideration paid 85,788 Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value (1) Cash and cash equivalents $ 16,667 Investment securities available-for-sale 78,594 Loans 407,840 Federal Home Loan Bank stock 453 Premises and equipment 6,520 Core deposit intangible 7,498 Other assets 25,535 Deposits (479,379 ) Other liabilities (15,240 ) Total identifiable net assets $ 48,488 Goodwill $ 37,300 (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 UCB 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 UCB’s allowance for loan losses associated with the loans we acquired as the loans were initially recorded at fair value. Loans acquired with evidence of credit quality deterioration were evaluated and not considered to be significant. The core deposit intangible asset recognized as part of the UCB merger is being amortized over its estimated useful life of approximately 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 UCB 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 UCB merger were expensed as incurred and were $3.0 million during the six months ended June 30, 2019, which includes technology and communications costs, professional services, marketing and advertising, and other noninterest expenses.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases At inception, the Company determines if an arrangement contains a lease and whether that lease meets the classification of a finance or operating lease. Operating lease ROU assets represent our right to use an underlying asset during the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments. ROU assets are further adjusted for lease incentives and initial direct costs. The Company has operating leases for certain branch and office facilities or land with lease terms up to 35 years . These leases generally contain renewal options for periods ranging from one to ten years . These options are included in the lease term when it is reasonably certain that the options will be exercised. Some of the Company’s lease arrangements contain lease components (e.g., minimum rent payments) and non-lease components (e.g., common area maintenance, taxes, etc.). The Company elected the option of not separating lease and non-lease components and instead we account for them as a single lease component. Certain lease agreements include rental payments that are adjusted periodically for an index or rate. The leases are initially measured using the projected adjustment for the index or rate in effect at the commencement date. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. Generally, the Company cannot practically determine the interest rate implicit in the lease. Therefore, the Company uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. Lease expense for these leases is recognized on a straight-line basis over the lease term, with variable lease payments recognized in the period those payments are incurred. The components of lease cost recognized within our consolidated statements of income were as follows (in thousands): For the quarter ended June 30, 2019 For the six months ended June 30, 2019 Operating lease costs (office operations) $ 1,382 2,681 Variable lease costs (office operations) 56 190 Total operating lease costs $ 1,438 2,871 Amounts reported in the consolidated statements of financial condition were as follows (in thousands): Operating leases: As of June 30, 2019 Operating lease ROU assets (other assets) $ 45,944 Operating lease liabilities (other liabilities) 48,593 Other information related to leases as of June 30, 2019 was as follows (in thousands): Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 2,692 ROU assets obtained in exchange for lease obligations $ 7,630 Weighted average remaining lease term 15.7 years Weighted average discount rate 3.8 % Amounts disclosed for ROU assets obtained in exchange for lease obligations include amounts added to the carrying amount of ROU assets resulting from lease modifications and reassessments. Maturities of lease liabilities by fiscal year for our operating leases are as follows (in thousands): As of June 30, 2019 2019 $ 2,832 2020 5,173 2021 4,841 2022 4,536 2023 4,277 Thereafter 44,878 Total lease payments 66,537 Less amount of lease payments representing interest 17,944 Total present value of lease payments $ 48,593 As of December 31, 2018 2019 $ 4,677 2020 3,884 2021 3,179 2022 2,465 2023 2,040 Thereafter 7,784 Total lease payments $ 24,029 The Company has an additional operating lease with undiscounted total payments of $3.4 million which has not commenced as of June 30, 2019 , and as such, has not been recognized in the Company’s consolidated statement of financial condition. We anticipate this lease to commence during 2019

Investment securities and impai

Investment securities and impairment of investment securities	6 Months Ended
	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investment securities and impairment of investment securities	Investment securities and impairment of investment securities The following table shows the portfolio of investment securities available-for-sale at June 30, 2019 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Debt issued by the U.S. government and agencies: Due in one year or less $ 14,852 75 — 14,927 Debt issued by government sponsored enterprises: Due in one year or less 85,097 92 (165 ) 85,024 Due in one year through five years 85,941 344 (511 ) 85,774 Due in five years through ten years 4,061 44 (123 ) 3,982 Municipal securities: Due in one year or less 1,171 3 — 1,174 Due in one year through five years 3,794 84 — 3,878 Due in five years through ten years 12,597 150 (1 ) 12,746 Due after ten years 13,748 263 — 14,011 Corporate debt issues: Due in five years through ten years 917 — — 917 Residential mortgage-backed securities: Fixed rate pass-through 147,141 1,747 (1,320 ) 147,568 Variable rate pass-through 21,577 896 (4 ) 22,469 Fixed rate agency CMOs 399,260 4,512 (1,583 ) 402,189 Variable rate agency CMOs 60,092 198 (184 ) 60,106 Total residential mortgage-backed securities 628,070 7,353 (3,091 ) 632,332 Total marketable securities available-for-sale $ 850,248 8,408 (3,891 ) 854,765 The following table shows the portfolio of investment securities available-for-sale at December 31, 2018 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Debt issued by the U.S. government and agencies: Due in one year through five years $ 14,756 24 — 14,780 Debt issued by government sponsored enterprises: Due in one year or less 85,089 — (795 ) 84,294 Due in one year through five years 101,078 71 (1,512 ) 99,637 Due after ten years 3,546 — (142 ) 3,404 Municipal securities: Due in one year or less 1,333 2 (6 ) 1,329 Due in one year through five years 3,985 54 (4 ) 4,035 Due in five years through ten years 10,603 60 — 10,663 Due after ten years 5,105 31 — 5,136 Corporate debt issues: Due in five years through ten years 914 — — 914 Residential mortgage-backed securities: Fixed rate pass-through 130,172 568 (4,113 ) 126,627 Variable rate pass-through 24,761 1,003 (5 ) 25,759 Fixed rate agency CMOs 365,427 865 (5,921 ) 360,371 Variable rate agency CMOs 64,246 280 (25 ) 64,501 Total residential mortgage-backed securities 584,606 2,716 (10,064 ) 577,258 Total marketable securities available-for-sale $ 811,015 2,958 (12,523 ) 801,450 The following table shows the portfolio of investment securities held-to-maturity at June 30, 2019 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,609 98 — 2,707 Variable rate pass-through 1,469 41 — 1,510 Fixed rate agency CMOs 15,718 114 — 15,832 Variable rate agency CMOs 618 9 — 627 Total residential mortgage-backed securities 20,414 262 — 20,676 Total marketable securities held-to-maturity $ 20,414 262 — 20,676 The following table shows the portfolio of investment securities held-to-maturity at December 31, 2018 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,896 53 — 2,949 Variable rate pass-through 1,666 39 — 1,705 Fixed rate agency CMOs 17,552 — (422 ) 17,130 Variable rate agency CMOs 651 11 — 662 Total residential mortgage-backed securities 22,765 103 (422 ) 22,446 Total marketable securities held-to-maturity $ 22,765 103 (422 ) 22,446 The following table shows the fair value of and gross unrealized losses on investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at June 30, 2019 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss U.S. government sponsored enterprises $ — — 122,504 (799 ) 122,504 (799 ) Municipal securities 502 (2 ) — — 502 (2 ) Residential mortgage-backed securities - agency 41,395 (381 ) 196,183 (2,711 ) 237,578 (3,092 ) Total temporarily impaired securities $ 41,897 (383 ) 318,687 (3,510 ) 360,584 (3,893 ) The following table shows the fair value of and gross unrealized losses on investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2018 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss U.S. government sponsored enterprises $ — — 136,425 (2,449 ) 136,425 (2,449 ) Municipal securities 929 (1 ) 1,709 (10 ) 2,638 (11 ) Residential mortgage-backed securities - agency 34,031 (30 ) 346,675 (10,456 ) 380,706 (10,486 ) Total temporarily impaired securities $ 34,960 (31 ) 484,809 (12,915 ) 519,769 (12,946 ) We review our investment portfolio for indications of impairment. This review includes analyzing the length of time and the extent to which amortized costs have exceeded fair values, the financial condition and near-term prospects of the issuer, including any specific events which may influence the operations of the issuer, and the intent and ability to hold the investments for a period of time sufficient to allow for a recovery in value. We do not have the intent to sell these securities and it is more likely than not that we will not have to sell these securities before a recovery of our cost basis. For these reasons, we consider the unrealized losses to be temporary impairment losses. Credit related impairment on all debt securities is recognized in earnings while noncredit related impairment on available-for-sale debt securities, not expected to be sold, is recognized in other comprehensive income. The table below shows a cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold for the quarter ended June 30, (in thousands): 2019 2018 Beginning balance at January 1, (1) $ — 352 Credit losses on debt securities for which other-than-temporary impairment was not previously recognized — — Reduction for losses realized during the quarter — — Reduction for securities sold/called realized during the quarter — (352 ) Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized — — Ending balance at June 30, $ — — (1) The beginning balance represents credit losses included in other-than-temporary impairment charges recognized on debt securities in prior periods.

Loans receivable

Loans receivable	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans receivable	Loans receivable The following table shows a summary of our loans receivable at June 30, 2019 and December 31, 2018 (in thousands): June 30, 2019 December 31, 2018 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,799,400 92,372 2,891,772 2,766,430 93,782 2,860,212 Home equity loans 1,041,302 273,645 1,314,947 1,043,878 214,544 1,258,422 Consumer finance loans (2) 1,449 — 1,449 3,817 — 3,817 Consumer loans 938,052 45,217 983,269 775,378 58,671 834,049 Total Personal Banking 4,780,203 411,234 5,191,437 4,589,503 366,997 4,956,500 Commercial Banking: Commercial real estate loans 2,551,548 479,063 3,030,611 2,416,047 223,327 2,639,374 Commercial loans 695,672 64,454 760,126 612,962 48,816 661,778 Total Commercial Banking 3,247,220 543,517 3,790,737 3,029,009 272,143 3,301,152 Total loans receivable, gross 8,027,423 954,751 8,982,174 7,618,512 639,140 8,257,652 Deferred loan costs 44,676 609 45,285 36,820 798 37,618 Allowance for loan losses (48,429 ) (4,678 ) (53,107 ) (51,751 ) (3,463 ) (55,214 ) Undisbursed loan proceeds: Residential mortgage loans (11,187 ) — (11,187 ) (11,513 ) — (11,513 ) Commercial real estate loans (215,132 ) (7,326 ) (222,458 ) (167,029 ) (524 ) (167,553 ) Commercial loans (55,786 ) (1,146 ) (56,932 ) (63,605 ) (1,160 ) (64,765 ) Total loans receivable, net $ 7,741,565 942,210 8,683,775 7,361,434 634,791 7,996,225 (1) There were no loans held for sale at June 30, 2019 and December 31, 2018 . (2) Represents loans from our consumer finance subsidiary that was closed in 2017. Such loans are no longer being originated. Acquired loans were initially measured at fair value and subsequently accounted for under either ASC Topic 310-30 or ASC Topic 310-20. The following table provides information related to the outstanding principal balance and related carrying value of acquired loans for the dates indicated (in thousands): June 30, 2019 December 31, 2018 Acquired loans evaluated individually for future credit losses: Outstanding principal balance $ 7,844 8,189 Carrying value 5,324 5,690 Acquired loans evaluated collectively for future credit losses: Outstanding principal balance 952,597 637,170 Carrying value 941,564 632,564 Total acquired loans: Outstanding principal balance 960,441 645,359 Carrying value 946,888 638,254 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 (in thousands): Total Balance at December 31, 2017 $ 1,540 Accretion (785 ) Net reclassification from nonaccretable yield — Balance at December 31, 2018 755 Accretion (267 ) Net reclassification from nonaccretable yield — Balance at June 30, 2019 $ 488 The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the six months ended June 30, 2019 (in thousands): Carrying value Outstanding principal balance Related impairment reserve Average recorded investment in impaired loans Interest income recognized Personal Banking: Residential mortgage loans $ 950 1,559 3 970 55 Home equity loans 839 1,781 7 923 70 Consumer loans 18 53 4 24 7 Total Personal Banking 1,807 3,393 14 1,917 132 Commercial Banking: Commercial real estate loans 3,439 4,366 4 3,512 133 Commercial loans 78 85 — 78 2 Total Commercial Banking 3,517 4,451 4 3,590 135 Total $ 5,324 7,844 18 5,507 267 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, 2018 (in thousands): Carrying Outstanding Related Average Interest Personal Banking: Residential mortgage loans $ 990 1,598 6 1,294 226 Home equity loans 1,008 1,959 7 1,483 157 Consumer loans 29 76 4 53 35 Total Personal Banking 2,027 3,633 17 2,830 418 Commercial Banking: Commercial real estate loans 3,584 4,471 1 4,028 358 Commercial loans 79 85 — 82 9 Total Commercial Banking 3,663 4,556 1 4,110 367 Total $ 5,690 8,189 18 6,940 785 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the quarter ended June 30, 2019 (in thousands): Balance as of June 30, 2019 Current period provision Charge-offs Recoveries Balance as of Originated loans Personal Banking: Residential mortgage loans $ 3,909 185 (390 ) 109 4,005 Home equity loans 2,990 153 (249 ) 24 3,062 Consumer finance loans 266 (191 ) (58 ) 110 405 Consumer loans 10,500 1,328 (2,472 ) 514 11,130 Total Personal Banking 17,665 1,475 (3,169 ) 757 18,602 Commercial Banking: Commercial real estate loans 20,962 (508 ) (4,147 ) 147 25,470 Commercial loans 9,802 2,937 (874 ) 100 7,639 Total Commercial Banking 30,764 2,429 (5,021 ) 247 33,109 Total originated loans 48,429 3,904 (8,190 ) 1,004 51,711 Acquired loans Personal Banking: Residential mortgage loans 104 — (7 ) 19 92 Home equity loans 344 (16 ) (140 ) 101 399 Consumer loans 511 32 (36 ) 61 454 Total Personal Banking 959 16 (183 ) 181 945 Commercial Banking: Commercial real estate loans 2,571 23 (220 ) 301 2,467 Commercial loans 1,148 724 (213 ) 39 598 Total Commercial Banking 3,719 747 (433 ) 340 3,065 Total acquired loans 4,678 763 (616 ) 521 4,010 Total $ 53,107 4,667 (8,806 ) 1,525 55,721 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the quarter ended June 30, 2018 (in thousands): Balance as of June 30, 2018 Current period provision Charge-offs Recoveries Balance as of March 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 3,657 157 (310 ) 86 3,724 Home equity loans 3,839 272 (241 ) 91 3,717 Consumer finance loans 2,354 (370 ) (486 ) 179 3,031 Consumer loans 9,760 2,543 (2,623 ) 700 9,140 Total Personal Banking 19,610 2,602 (3,660 ) 1,056 19,612 Commercial Banking: Commercial real estate loans 21,019 991 (343 ) 153 20,218 Commercial loans 10,509 1,373 (311 ) 154 9,293 Total Commercial Banking 31,528 2,364 (654 ) 307 29,511 Total originated loans 51,138 4,966 (4,314 ) 1,363 49,123 Acquired loans Personal Banking: Residential mortgage loans 170 74 (79 ) 86 89 Home equity loans 662 56 (165 ) 43 728 Consumer loans 915 139 (59 ) 28 807 Total Personal Banking 1,747 269 (303 ) 157 1,624 Commercial Banking: Commercial real estate loans 3,422 (27 ) (96 ) 115 3,430 Commercial loans 1,025 141 (180 ) 30 1,034 Total Commercial Banking 4,447 114 (276 ) 145 4,464 Total acquired loans 6,194 383 (579 ) 302 6,088 Total $ 57,332 5,349 (4,893 ) 1,665 55,211 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the six months ended June 30, 2019 (in thousands): Balance as of June 30, 2019 Current period provision Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 3,909 372 (739 ) 222 4,054 Home equity loans 2,990 117 (360 ) 49 3,184 Consumer finance loans 266 (419 ) (237 ) 246 676 Other consumer loans 10,500 4,377 (5,280 ) 999 10,404 Total Personal Banking 17,665 4,447 (6,616 ) 1,516 18,318 Commercial Banking: Commercial real estate loans 20,962 (972 ) (4,716 ) 271 26,379 Commercial loans 9,802 3,811 (1,331 ) 268 7,054 Total Commercial Banking 30,764 2,839 (6,047 ) 539 33,433 Total originated loans 48,429 7,286 (12,663 ) 2,055 51,751 Acquired loans Personal Banking: Residential mortgage loans 104 8 (15 ) 28 83 Home equity loans 344 28 (182 ) 150 348 Other consumer loans 511 68 (70 ) 94 419 Total Personal Banking 959 104 (267 ) 272 850 Commercial Banking: Commercial real estate loans 2,571 278 (255 ) 552 1,996 Commercial loans 1,148 3,466 (3,026 ) 91 617 Total Commercial Banking 3,719 3,744 (3,281 ) 643 2,613 Total acquired loans 4,678 3,848 (3,548 ) 915 3,463 Total $ 53,107 11,134 (16,211 ) 2,970 55,214 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the six months ended June 30, 2018 (in thousands): Balance as of June 30, 2018 Current period provision Charge-offs Recoveries Balance as of December 31, 2017 Originated loans Personal Banking: Residential mortgage loans $ 3,657 187 (506 ) 152 3,824 Home equity loans 3,839 187 (542 ) 122 4,072 Consumer finance loans 2,354 (32 ) (2,039 ) 457 3,968 Other consumer loans 9,760 5,822 (5,799 ) 1,262 8,475 Total Personal Banking 19,610 6,164 (8,886 ) 1,993 20,339 Commercial Banking: Commercial real estate loans 21,019 1,694 (883 ) 297 19,911 Commercial loans 10,509 1,035 (1,140 ) 292 10,322 Total Commercial Banking 31,528 2,729 (2,023 ) 589 30,233 Total originated loans 51,138 8,893 (10,909 ) 2,582 50,572 Acquired loans Personal Banking: Residential mortgage loans 170 32 (84 ) 91 131 Home equity loans 662 258 (475 ) 117 762 Other consumer loans 915 85 (132 ) 72 890 Total Personal Banking 1,747 375 (691 ) 280 1,783 Commercial Banking: Commercial real estate loans 3,422 (157 ) (107 ) 137 3,549 Commercial loans 1,025 447 (376 ) 63 891 Total Commercial Banking 4,447 290 (483 ) 200 4,440 Total acquired loans 6,194 665 (1,174 ) 480 6,223 Total $ 57,332 9,558 (12,083 ) 3,062 56,795 The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at June 30, 2019 (in thousands): Total loans receivable Allowance for loan losses Nonaccrual loans (1) Loans past due 90 days or more and still accruing (2) TDRs Allowance related to TDRs Additional commitments to customers with loans classified as TDRs Personal Banking: Residential mortgage loans $ 2,899,164 4,013 11,972 — 7,369 776 — Home equity loans 1,314,947 3,334 7,201 55 2,018 459 32 Consumer finance loans 1,449 266 10 — — — — Consumer loans 1,009,975 11,011 3,480 — — — — Total Personal Banking 5,225,535 18,624 22,663 55 9,387 1,235 32 Commercial Banking: Commercial real estate loans 2,808,153 23,533 35,623 — 18,256 1,479 404 Commercial loans 703,194 10,950 9,411 — 3,626 486 25 Total Commercial Banking 3,511,347 34,483 45,034 — 21,882 1,965 429 Total $ 8,736,882 53,107 67,697 55 31,269 3,200 461 (1) Includes $13.4 million of nonaccrual TDRs. (2) Represents loans 90 days or more past maturity and still accruing. The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2018 (in thousands): Total loans receivable Allowance for loan losses Nonaccrual loans (1) Loans past due 90 days or more and still accruing (2) TDRs Allowance related to TDRs Additional commitments to customers with loans classified as TDRs Personal Banking: Residential mortgage loans $ 2,864,470 4,137 15,848 — 5,382 993 — Home equity loans 1,258,422 3,532 7,075 136 4,502 1,520 4 Consumer finance loans 3,817 676 22 3 — — — Consumer loans 855,896 10,823 4,300 27 — — — Total Personal Banking 4,982,605 19,168 27,245 166 9,884 2,513 4 Commercial Banking: Commercial real estate loans 2,471,821 28,375 36,935 — 19,859 313 310 Commercial loans 597,013 7,671 8,101 — 3,865 263 74 Total Commercial Banking 3,068,834 36,046 45,036 — 23,724 576 384 Total $ 8,051,439 55,214 72,281 166 33,608 3,089 388 (1) Includes $15.3 million of nonaccrual TDRs. (2) Represents loans 90 days or more past maturity and still accruing. 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 six months ended June 30, 2019 (in thousands): Nonaccrual loans 90 or more days delinquent Nonaccrual loans less than 90 days delinquent Loans less than 90 days delinquent reviewed for impairment TDRs less than 90 days delinquent not included elsewhere Total impaired loans Average recorded investment in impaired loans Interest income recognized on impaired loans Personal Banking: Residential mortgage loans $ 10,617 1,355 505 6,034 18,511 19,486 472 Home equity loans 5,591 1,610 — 1,683 8,884 8,738 286 Consumer finance loan 10 — — — 10 — — Consumer loans 2,892 588 — — 3,480 3,705 152 Total Personal Banking 19,110 3,553 505 7,717 30,885 31,929 910 Commercial Banking: Commercial real estate loans 21,123 14,500 3,361 4,189 43,173 47,684 1,004 Commercial loans 2,920 6,491 222 2,280 11,913 9,765 241 Total Commercial Banking 24,043 20,991 3,583 6,469 55,086 57,449 1,245 Total $ 43,153 24,544 4,088 14,186 85,971 89,378 2,155 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2018 (in thousands): Nonaccrual loans 90 or more days delinquent Nonaccrual loans less than 90 days delinquent Loans less than 90 days delinquent reviewed for impairment TDRs less than 90 days delinquent not included elsewhere Total impaired loans Average recorded investment in impaired loans Interest income recognized on impaired loans Personal Banking: Residential mortgage loans $ 12,965 2,883 — 6,660 22,508 20,733 910 Home equity loans 5,996 1,079 — 1,818 8,893 9,075 511 Consumer finance loans 22 — — — 22 24 — Consumer loans 3,228 1,072 — — 4,300 3,992 235 Total Personal Banking 22,211 5,034 — 8,478 35,723 33,824 1,656 Commercial Banking: Commercial real estate loans 25,509 11,426 8,549 4,435 49,919 41,328 1,599 Commercial loans 3,010 5,091 2,453 2,087 12,641 9,186 507 Total Commercial Banking 28,519 16,517 11,002 6,522 62,560 50,514 2,106 Total $ 50,730 21,551 11,002 15,000 98,283 84,338 3,762 At June 30, 2019 , we expect to fully collect the carrying value of our purchased credit impaired loans and have determined that we can reasonably estimate their future cash flows including those loans that are 90 days or more delinquent. As a result, we do not consider our purchased credit impaired loans that are 90 days or more delinquent to be nonaccrual or impaired and continue to recognize interest income on these loans, including the loans’ accretable discount. The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at June 30, 2019 (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 impairment reserve Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,891,404 7,760 7,760 777 — Home equity loans 1,312,929 2,018 2,018 459 — Consumer finance loans 1,449 — — — — Consumer loans 1,009,956 19 19 5 — Total Personal Banking 5,215,738 9,797 9,797 1,241 — Commercial Banking: Commercial real estate loans 2,778,298 29,855 26,741 2,921 3,114 Commercial loans 693,086 10,108 8,901 1,636 1,207 Total Commercial Banking 3,471,384 39,963 35,642 4,557 4,321 Total $ 8,687,122 49,760 45,439 5,798 4,321 The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2018 (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 impairment reserve Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,856,359 8,111 8,111 747 — Home equity loans 1,256,255 2,167 2,167 523 — Consumer finance loans 3,817 — — — — Consumer loans 855,867 29 29 6 — Total Personal Banking 4,972,298 10,307 10,307 1,276 — Commercial Banking: Commercial real estate loans 2,436,605 35,216 31,830 6,499 3,386 Commercial loans 588,932 8,081 6,738 767 1,343 Total Commercial Banking 3,025,537 43,297 38,568 7,266 4,729 Total $ 7,997,835 53,604 48,875 8,542 4,729 Our loan portfolios include loans that have been modified in a troubled debt restructuring ("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 nine 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. The following tables provide a roll forward of troubled debt restructurings for the periods indicated (in thousands): For the quarter ended June 30, 2019 2018 Number of contracts Amount Number of contracts Amount Beginning TDR balance: 195 $ 32,812 200 $ 30,966 New TDRs 2 306 10 861 Re-modified TDRs — — — — Net paydowns — — — (875 ) Charge-offs: Residential mortgage loans — — — — Home equity loans — — — — Commercial real estate loans — — — — Commercial loans — — — — Paid-off loans: Residential mortgage loans 4 (180 ) 1 (6 ) Home equity loans 4 (75 ) 1 (35 ) Commercial real estate loans 6 (1,594 ) 3 (249 ) Commercial loans — — — — Ending TDR balance: 183 $ 31,269 205 $ 30,662 Accruing TDRs $ 17,894 $ 19,802 Non-accrual TDRs 13,375 10,860 For the six months ended June 30, 2019 2018 Number of contracts Amount Number of contracts Amount Beginning TDR balance: 195 $ 33,608 205 $ 32,104 New TDRs 2 306 19 5,796 Re-modified TDRs — — — — Net paydowns — (786 ) — (1,822 ) Charge-offs: Residential mortgage loans — — 1 (135 ) Home equity loans — — — — Commercial real estate loans — — 1 (203 ) Commercial loans — — 1 (721 ) Paid-off loans: Residential mortgage loans 4 (180 ) 2 (255 ) Home equity loans 4 (75 ) 2 (47 ) Commercial real estate loans 6 (1,604 ) 7 (1,823 ) Commercial loans — — 5 (2,232 ) Ending TDR balance: 183 $ 31,269 205 $ 30,662 Accruing TDRs $ 17,894 $ 19,802 Non-accrual TDRs 13,375 10,860 The following tables provide information related to troubled debt restructurings (including re-modified TDRs) by portfolio segment and by class of financing receivable during the periods indicated (in thousands): For the quarter ended June 30, 2019 For the six months ended June 30, 2019 Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Personal Banking: Residential mortgage loans — $ — — — — $ — — — Home equity loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking — — — — — — — — Commercial Banking: Commercial real estate loans 1 300 297 32 1 300 297 32 Commercial loans 1 10 9 1 1 10 9 1 Total Commercial Banking 2 310 306 33 2 310 306 33 Total 2 $ 310 306 33 2 $ 310 306 33 No TDRs modified within the previous twelve months have subsequently defaulted. For the quarter ended June 30, 2018 For the six months ended June 30, 2018 Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Personal Banking: Residential mortgage loans 2 $ 60 59 6 4 $ 273 272 27 Home equity loans 5 177 137 37 8 317 275 74 Total Personal Banking 7 237 196 43 12 590 547 101 Commercial Banking: Commercial real estate loans 1 481 481 33 2 2,883 2,852 33 Commercial loans 2 143 142 10 5 2,323 1,508 10 Total Commercial Banking 3 624 623 43 7 5,206 4,360 43 Total 10 $ 861 819 86 19 $ 5,796 4,907 144 During the quarter and six months ended June 30, 2018 , no TDRs modified within the previous twelve months of June 30, 2018, subsequently defaulted. The following table provides information as of June 30, 2019 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended June 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 1 — 297 — — 297 Commercial loans 1 — — 9 — 9 Total Commercial Banking 2 — 297 9 — 306 Total 2 $ — 297 9 — 306 The following table provides information as of June 30, 2018 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended June 30, 2018 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 2 $ 7 — — 52 59 Home equity loans 5 — — 51 86 137 Total Personal Banking 7 7 — 51 138 196 Commercial Banking: Commercial real estate loans 1 — 481 — — 481 Commercial loans 2 — — 142 — 142 Total Commercial Banking 3 — 481 142 — 623 Total 10 $ 7 481 193 138 819 The following table provides information as of June 30, 2019 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the six months ended June 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 1 — 297 — — 297 Commercial loans 1 — — 9 — 9 Total Commercial Banking 2 — 297 9 — 306 Total 2 $ — 297 9 — 306 The following table provides information as of June 30, 2018 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the six months ended June 30, 2018 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 4 $ 7 — 178 87 272 Home equity loans 8 29 — 51 195 275 Consumer loans — — — — — — Total Personal Banking 12 36 — 229 282 547 Commercial Banking: Commercial real estate loans 2 — 481 — 2,371 2,852 Commercial loans 5 — — 142 1,366 1,508 Total Commercial Banking 7 — 481 142 3,737 4,360 Total 19 $ 36 481 371 4,019 4,907 No TDRs were re-modified during the quarters ended June 30, 2018 and June 30, 2019 . The following table provides information related to loan payment delinquencies at June 30, 2019 (in thousands): 30-59 Days delinquent 60-89 Days delinquent 90 Days or greater delinquent Total delinquency Current Total loans receivable 90 Days or greater delinquent and accruing (1) Originated loans Personal Banking: Residential mortgage loans $ 1,562 5,806 9,226 16,594 2,790,198 2,806,792 — Home equity loans 3,327 1,942 4,463 9,732 1,031,570 1,041,302 — Consumer finance loans 130 44 10 184 1,265 1,449 — Consumer loans 7,275 2,702 2,683 12,660 951,489 964,149 — Total Personal Banking 12,294 10,494 16,382 39,170 4,774,522 4,813,692 — Commercial Banking: Commercial real estate loans 2,286 2,551 15,256 20,093 2,316,323 2,336,416 — Commercial loans 559 1,717 2,288 4,564 635,322 639,886 — Total Commercial Banking 2,845 4,268 17,544 24,657 2,951,645 2,976,302 — Total originated loans 15,139 14,762 33,926 63,827 7,726,167 7,789,994 — Acquired loans Personal Banking: Residential mortgage loans 67 458 1,574 2,099 90,273 92,372 183 Home equity loans 1,246 377 1,128 2,751 270,894 273,645 — Consumer loans 225 151 215 591 45,235 45,826 6 Total Personal Banking 1,538 986 2,917 5,441 406,402 411,843 189 Commercial Banking: Commercial real estate loans 132 66 5,867 6,065 465,672 471,737 — Commercial loans 107 8 632 747 62,561 63,308 — Total Commercial Banking 239 74 6,499 6,812 528,233 535,045 — Total acquired loans 1,777 1,060 9,416 12,253 934,635 946,888 189 Total loans $ 16,916 15,822 43,342 76,080 8,660,802 8,736,882 189 (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 on 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. The following table provides information related to loan payment delinquencies at December 31, 2018 (in thousands): 30-59 Days delinquent 60-89 Days delinquent 90 Days or greater delinquent Total delinquency Current Total loans receivable 90 Days or Originated loans Personal Banking: Residential mortgage loans $ 27,245 5,732 11,668 44,645 2,714,474 2,759,119 — Home equity loans 6,810 1,771 4,825 13,406 1,030,472 1,043,878 — Consumer finance loans 661 172 21 854 2,963 3,817 — Consumer loans 9,000 2,867 3,037 14,904 793,092 807,996 — Total Personal Banking 43,716 10,542 19,551 73,809 4,541,001 4,614,810 — Commercial Banking: Commercial real estate loans 5,391 4,801 21,721 31,913 2,217,105 2,249,018 — Commercial loans 609 560 2,714 3,883 545,474 549,357 — Total Commercial Banking 6,000 5,361 24,435 35,796 2,762,579 2,798,375 — Total originated loan 49,716 15,903 43,986 109,605 7,303,580 7,413,185 — Acquired loans Personal Banking: Residential mortgage loans 532 693 1,317 2,542 91,240 93,782 19 Home equity loans 1,839 294 1,212 3,345 211,199 214,544 40 Consumer loans 447 175 196 818 58,651 59,469 6 Total Personal Banking 2,818 1,162 2,725 6,705 361,090 367,795 65 Commercial Banking: Commercial real estate loans 112 586 3,866 4,564 218,239 222,803 78 Commercial loans 364 — 296 660 46,996 47,656 — Total Commercial Banking 476 586 4,162 5,224 265,235 270,459 78 Total acquired loan 3,294 1,748 6,887 11,929 626,325 638,254 143 Total $ 53,010 17,651 50,873 121,534 7,929,905 8,051,439 143 (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: 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. The following table sets forth information about credit quality indicators updated during the six months ended June 30, 2019 (in thousands): Pass Special mention Substandard Doubtful Loss Total loans receivable Originated loans Personal Banking: Residential mortgage loans $ 2,799,431 — 7,361 — — 2,806,792 Home equity loans 1,035,922 — 5,380 — — 1,041,302 Consumer finance loans 1,449 — — — — 1,449 Consumer loans 960,968 — 3,181 — — 964,149 Total Personal Banking 4,797,770 — 15,922 — — 4,813,692 Commercial Banking: Commercial real estate loans 2,152,525 80,607 103,103 181 — 2,336,416 Commercial loans 567,069 35,914 35,921 982 — 639,886 Total Commercial Banking 2,719,594 116,521 139,024 1,163 — 2,976,302 Total originated loans 7,517,364 116,521 154,946 1,163 — 7,789,994 Acquired loans Personal Banking: Residential mortgage loans 91,041 — 1,331 — — 92,372 Home equity loans 271,965 — 1,680 — — 273,645 Consumer loans 45,396 — 430 — — 45,826 Total Personal Banking 408,402 — 3,441 — — 411,843 Commercial Banking: Commercial real estate loans 433,487 5,828 32,422 — — 471,737 Commercial loans 54,821 2,267 6,220 — — 63,308 Total Commercial Banking 488,308 8,095 38,642 — — 535,045 Total acquired loans 896,710 8,095 42,083 — — 946,888 Total loans $ 8,414,074 124,616 197,029 1,163 — 8,736,882 The following table sets forth information about credit quality indicators, which were updated during the year ended December 31, 2018 (in thousands): Pass Special mention Substandard Doubtful Loss Total loans receivable Originated loans Personal Banking: Residential mortgage loans $ 2,749,266 — 9,853 — — 2,759,119 Home equity loans 1,038,245 — 5,633 — — 1,043,878 Consumer finance loans 3,817 — — — — 3,817 Consumer loans 804,075 — 3,921 — — 807,996 Total Personal Banking 4,595,403 — 19,407 — — 4,614,810 Commercial Banking: Commercial real estate loans 2,062,728 91,142 95,148 — — 2,249,018 Commercial loans 503,665 15

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 December 31, 2018 Amortizable intangible assets: Core deposit intangibles - gross $ 63,685 63,685 Acquisitions 7,498 — Less: accumulated amortization (47,934 ) (45,027 ) Core deposit intangibles - net 23,249 18,658 Customer and Contract intangible assets - gross 10,474 10,474 Less: accumulated amortization (9,611 ) (9,311 ) Customer and Contract intangible assets - net 863 1,163 Total intangible assets - net $ 24,112 19,821 The following table shows the actual aggregate amortization expense for the quarters ended June 30, 2019 and 2018 , 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 June 30, 2019 $ 1,760 For the quarter ended June 30, 2018 1,520 For the six months ended June 30, 2019 3,207 For the six months ended June 30, 2018 3,040 For the year ending December 31, 2019 6,718 For the year ending December 31, 2020 5,535 For the year ending December 31, 2021 4,438 For the year ending December 31, 2022 3,438 For the year ending December 31, 2023 2,561 For the year ending December 31, 2024 1,876 The following table provides information for the changes in the carrying amount of goodwill (in thousands): Total Balance at December 31, 2017 $ 307,420 Goodwill from acquisition — Balance at December 31, 2018 307,420 Goodwill from acquisition 37,300 Balance at June 30, 2019 $ 344,720 We performed our annual goodwill impairment test as of June 30, 2019 in accordance with ASC 350, as updated by ASU 2017-04, ("Step 0") and concluded that goodwill was not impaired. As of June 30, 2019 , there were no events or changes in circumstances that would cause us to update that goodwill impairment test.

Borrowed Funds

Borrowed Funds	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds (a) Borrowings Borrowings from the Federal Home Loan Bank of Pittsburgh ("FHLB"), 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 carries a commitment of $250.0 million . The rate is adjusted daily by the FHLB, and any borrowings on this line may be repaid at any time without penalty. At June 30, 2019 and December 31, 2018 the balance of the revolving line of credit was $87.3 million and $128.6 million , respectively. At June 30, 2019 and December 31, 2018 , collateralized borrowings due within one year were $84.4 million and $105.8 million , respectively. These borrowings are collateralized by cash or various securities held in safekeeping by the FHLB. (b) Trust Preferred Securities Prior to our merger with DFSC, we owned three statutory business trusts: Northwest Bancorp Capital Trust III, a Delaware statutory business trust, Northwest Bancorp Statutory Trust IV, a Connecticut statutory business trust and LNB Trust II, a Delaware statutory business trust (the 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. Northwest Bancorp Capital Trust III issued 50,000 cumulative trust preferred securities in a private transaction to a pooled investment vehicle on December 5, 2005 (liquidation value of $1,000 per preferred security or $50,000,000 ) with a stated maturity of December 30, 2035 and a floating rate of interest, which is reset quarterly, equal to three-month LIBOR plus 1.38% . Northwest Bancorp Statutory Trust IV issued 50,000 cumulative trust preferred securities in a private transaction to a pooled investment vehicle on December 15, 2005 (liquidation value of $1,000 per preferred security or $50,000,000 ) with a stated maturity of December 15, 2035 and a floating rate of interest, which is reset quarterly, equal to three-month LIBOR plus 1.38% . LNB Trust II has 7,875 cumulative trust preferred securities outstanding (liquidation value of $1,000 per preferred security or $7,875,000 ) with a stated maturity of June 15, 2037 and a floating rate of interest, which resets quarterly, equal to three-month LIBOR plus 1.48% . 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 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. Northwest Bancorp Capital Trust III holds $51,547,000 of the Company’s junior subordinated debentures due December 30, 2035 with a floating rate of interest, reset quarterly, of three-month LIBOR plus 1.38% . The rate in effect at June 30, 2019 was 3.69% . Northwest Bancorp Statutory Trust IV holds $51,547,000 of the Company’s junior subordinated debentures due December 15, 2035 with a floating rate of interest, reset quarterly, of three-month LIBOR plus 1.38% . The rate in effect at June 30, 2019 was 3.79% . LNB Trust II holds $8,119,000 of the Company's junior subordinated debentures due June 15, 2037, with a floating rate of interest, reset quarterly, of three-month LIBOR plus 1.48% . The rate in effect at June 30, 2019 was 3.89% . As a result of the merger with DFSC, we acquired two additional statutory business trusts: Union National Capital Trust I ("UNCT I") and Union National Capital Trust II ("UNCT II"); both are Delaware statutory business trusts. At June 30, 2019 , UNCT I had 8,000 cumulative trust preferred securities outstanding (liquidation value of $1,000 per preferred security or $8,000,000 ) with a stated maturity of December 19, 2034. These securities carry a floating interest rate, which is reset quarterly, equal to three-month LIBOR plus 2.85% . At June 30, 2019 , UNCT II had 3,000 cumulative trust preferred securities outstanding (liquidation value of $1,000 per preferred security or $3,000,000 ) with a stated maturity of October 14, 2034. These securities carry a floating interest rate, which is reset quarterly, equal to three-month LIBOR plus 2.0% . The Trusts have invested the proceeds of the offerings in junior subordinated deferrable interest debentures held by the Company. The structure of these debentures mirrors the structure of the trust-preferred securities. UNCT I holds $8,248,000 of junior subordinated debentures and UNCT II holds $3,093,000 of junior subordinated debentures. These subordinated debentures are the sole assets of the Trusts. Cash distributions on the trust securities are made on a quarterly basis to the extent interest on the debentures is received by the Trusts. We have the right to defer payment of interest on the subordinated debentures at any time, or from time-to-time, for periods not exceeding five years . If interest payments on the subordinated debentures are deferred, the distributions on the trust securities also are deferred. To date there have been no interest deferrals. Interest on the subordinated debentures and distributions on the trust securities is cumulative. Our obligation constitutes a full, irrevocable, and unconditional guarantee on a subordinated basis of the obligations of the trust under the preferred securities. The Trusts must redeem the preferred securities when the debentures are paid at maturity or upon an earlier redemption of the debentures to the extent the debentures are redeemed. All or part of the debentures may be redeemed at any time. Also, the debentures may be redeemed at any time if existing laws or regulations, or the interpretation or application of these laws or regulations, change causing: • the interest on the debentures to no longer be deductible by the Company for federal income tax purposes; • the trust to become subject to federal income tax or to certain other taxes or governmental charges; • the trust to register as an investment company; or • the preferred securities do not qualify as Tier I capital. We may, at any time, dissolve any of the Trusts and distribute the debentures to the trust security holders, subject to receipt of any required regulatory approval.

Guarantees

Guarantees	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 , the maximum potential amount of future payments we could be required to make under these non-recourse standby letters of credit was $40.9 million , of which $34.0 million is fully collateralized. At June 30, 2019 , we had a liability, which represents deferred income, of $322,000

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2019
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. All stock options outstanding, during the quarter ended June 30, 2019 and 2018 , were included in the computation of diluted earnings per share because the options’ exercise price was less than the average market price of the common shares of $ 17.16 and $ 17.07 , respectively. All stock options outstanding during the six months ended June 30, 2019 and 2018, were included in the computation of diluted earnings per share because the options' exercise price was less than the average market price of the common shares of $17.45 and $16.95 , respectively. The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share data and per share amounts): Quarter ended June 30, Six months ended June 30, 2019 2018 2019 2018 Reported net income $ 26,383 26,299 51,427 51,284 Weighted average common shares outstanding 105,233,635 101,870,043 104,173,601 101,735,235 Dilutive potential shares due to effect of stock options 1,024,580 1,554,111 1,208,669 1,545,885 Total weighted average common shares and dilutive potential shares 106,258,215 103,424,154 105,382,270 103,281,120 Basic earnings per share: $ 0.25 0.26 0.49 0.50 Diluted earnings per share: $ 0.25 0.25 0.49 0.50

Pension and Other Post-retireme

Pension and Other Post-retirement Benefits	6 Months Ended
	Jun. 30, 2019
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 June 30, Pension benefits Other post-retirement benefits 2019 2018 2019 2018 Service cost $ 1,274 1,716 — — Interest cost 1,851 1,678 13 13 Expected return on plan assets (2,759 ) (2,992 ) — — Amortization of prior service cost (580 ) (580 ) — — Amortization of the net loss 873 872 17 25 Net periodic cost $ 659 694 30 38 Six months ended June 30, Pension benefits Other post-retirement benefits 2019 2018 2019 2018 Service cost $ 2,549 3,432 — — Interest cost 3,703 3,356 26 27 Expected return on plan assets (5,519 ) (5,984 ) — — Amortization of prior service cost (1,161 ) (1,161 ) — — Amortization of the net loss 1,746 1,745 34 49 Net periodic cost $ 1,318 1,388 60 76 We anticipate making a contribution to our defined benefit pension plan of $2.0 million to $4.0 million during the year ending December 31, 2019 .

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2019
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, accrued interest receivable, accrued interest payable, and marketable securities available-for-sale. 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 US 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 Held for Investment The fair value of the loans 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. 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. Cash Flow Hedges - Interest Rate and Foreign Exchange Swap Agreements The fair value of the 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 June 30, 2019 and December 31, 2018 , 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 June 30, 2019 (in thousands): Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 106,988 106,988 106,988 — — Securities available-for-sale 854,765 854,765 — 854,765 — Securities held-to-maturity 20,414 20,676 — 20,676 — Loans receivable, net 8,683,775 8,627,759 — — 8,627,759 Accrued interest receivable 28,742 28,742 28,742 — — Interest rate swaps 18,420 18,420 — 18,420 — FHLB stock 14,966 14,966 — — — Total financial assets $ 9,728,070 9,672,316 135,730 893,861 8,627,759 Financial liabilities: Savings and checking deposits $ 7,083,521 7,083,521 7,083,521 — — Time deposits 1,600,372 1,599,989 — — 1,599,989 Borrowed funds 171,677 171,677 171,677 — — Junior subordinated debentures 121,757 115,124 — — 115,124 Interest rate swaps 18,472 18,472 — 18,472 — Accrued interest payable 1,207 1,207 1,207 — — Total financial liabilities $ 8,997,006 8,989,990 7,256,405 18,472 1,715,113 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, 2018 (in thousands): Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 68,789 68,789 68,789 — — Securities available-for-sale 801,450 801,450 — 801,450 — Securities held-to-maturity 22,765 22,446 — 22,446 — Loans receivable, net 7,996,225 7,845,313 — — 7,845,313 Accrued interest receivable 24,490 24,490 24,490 — — Interest rate swaps 6,445 6,445 — 6,445 — FHLB stock 15,635 15,635 — — — Total financial assets $ 8,935,799 8,784,568 93,279 830,341 7,845,313 Financial liabilities: Savings and checking accounts $ 6,489,338 6,489,338 6,489,338 — — Time deposits 1,404,841 1,434,410 — — 1,434,410 Borrowed funds 234,389 234,389 234,389 — — Junior subordinated debentures 111,213 102,572 — — 102,572 Interest rate swaps 6,445 6,445 — 6,445 — Accrued interest payable 744 744 744 — — Total financial liabilities $ 8,246,970 8,267,898 6,724,471 6,445 1,536,982 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 June 30, 2019 and December 31, 2018 . There were no transfers of financial instruments between Level 1 and Level 2 during the quarter ended June 30, 2019 . The following table represents assets and liabilities measured at fair value on a recurring basis at June 30, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Debt securities: U.S. government and agencies $ — 14,927 — 14,927 Government sponsored enterprises — 174,780 — 174,780 States and political subdivisions — 31,809 — 31,809 Corporate — 917 — 917 Total debt securities — 222,433 — 222,433 Residential mortgage-backed securities: GNMA — 26,009 — 26,009 FNMA — 87,434 — 87,434 FHLMC — 56,583 — 56,583 Non-agency — 11 — 11 Collateralized mortgage obligations: GNMA — 104,153 — 104,153 FNMA — 214,388 — 214,388 FHLMC — 143,754 — 143,754 Total mortgage-backed securities — 632,332 — 632,332 Interest rate swaps — 18,420 — 18,420 Total assets $ — 873,185 — 873,185 Interest rate swaps $ — 18,472 — 18,472 Total liabilities $ — 18,472 — 18,472 The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2018 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Debt securities: U.S. government and agencies $ — 14,780 — 14,780 Government sponsored enterprises — 187,335 — 187,335 States and political subdivisions — 21,163 — 21,163 Corporate — 914 — 914 Total debt securities — 224,192 — 224,192 Residential mortgage-backed securities: GNMA — 27,041 — 27,041 FNMA — 73,196 — 73,196 FHLMC — 51,621 — 51,621 Non-agency — 528 — 528 Collateralized mortgage obligations: GNMA — 52,331 — 52,331 FNMA — 207,033 — 207,033 FHLMC — 165,508 — 165,508 Total mortgage-backed securities — 577,258 — 577,258 Interest rate swaps — 6,445 — 6,445 Total assets $ — 807,895 — 807,895 Interest rate swaps $ — 6,445 — 6,445 Total liabilities $ — 6,445 — 6,445 There were no assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the quarters ended June 30, 2019 and June 30, 2018 . Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans measured for impairment, real estate owned, and mortgage servicing rights. 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 June 30, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Loans measured for impairment $ — — 39,642 39,642 Real estate owned — — 2,070 2,070 Total assets $ — — 41,712 41,712 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, 2018 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Loans measured for impairment $ — — 40,333 40,333 Real estate owned — — 2,498 2,498 Total assets $ — — 42,831 42,831 Impaired loans — A loan is considered to be impaired as described in Note 1 of the Notes to consolidated financial statements in Item 8 of Part II of our 2018 Annual Report on Form 10-K. We classify loans individually evaluated for impairment that require a specific reserve 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 June 30, 2019 (in thousands): Fair value Valuation techniques Significant unobservable inputs Range (weighted average) Loans measured for impairment $ 39,642 Appraisal value (1) Estimated cost to sell 10.0% Discounted cash flow Discount rate 4.25% to 11.0% (7.50%) Real estate owned $ 2,070 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	6 Months Ended
	Jun. 30, 2019
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 With the expiration of the $50.0 million in notional of interest rate swap agreements (swaps) previously designated in hedging relationships, we are no longer a counterparty to any interest rate swap agreements designated as cash flow hedges. Previously, the swaps were intended to protect against the variability of cash flows associated with Northwest Bancorp Capital Trust III and Northwest Bancorp Capital Trust IV. In 2018, the swaps matured without replacement. 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. 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 June 30, 2019 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 281,602 18,507 281,602 18,559 Total derivatives $ 281,602 18,507 281,602 18,559 At December 31, 2018 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 221,919 6,445 221,919 6,445 Total derivatives $ 221,919 6,445 221,919 6,445 The following table presents income or expense recognized on derivatives for the periods indicated (in thousands): For the quarter ended June 30, For the six months ended June 30, 2019 2018 2019 2018 Hedging interest rate derivatives: Increase in interest expense $ — 267 — 600 Non-hedging swap derivatives: Increase in other income — (417 ) — (288 )

Legal Proceedings

Legal Proceedings	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 we have not accrued for any legal proceedings based on our analysis of currently available information which is subject to significant judgment and a variety of assumptions and uncertainties. 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, on December 21, 2018, a verdict was rendered in favor of NWIS on several of its claims. Post-trial proceedings have concluded with the verdict affirmed and attorneys’ fees awarded. An appeal has been filed with the Pennsylvania Superior Court. 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 June 30, 2019 .

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2019
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/(loss) by component for the periods indicated (in thousands): For the quarter ended June 30, 2019 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of March 31, 2019 $ (2,380 ) — (32,655 ) (35,035 ) Other comprehensive income before reclassification adjustments 5,608 — — 5,608 Amounts reclassified from accumulated other comprehensive income (1), (2) (1 ) — 209 208 Net other comprehensive income 5,607 — 209 5,816 Balance as of June 30, 2019 $ 3,227 — (32,446 ) (29,219 ) For the quarter ended June 30, 2018 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of March 31, 2018 $ (9,381 ) (480 ) (32,360 ) (42,221 ) Other comprehensive income/(loss) before reclassification adjustments (1,237 ) 214 — (1,023 ) Amounts reclassified from accumulated other comprehensive income (3), (4) (75 ) — 226 151 Net other comprehensive income/(loss) (1,312 ) 214 226 (872 ) Balance as of June 30, 2018 $ (10,693 ) (266 ) (32,134 ) (43,093 ) (1) Consists of realized gain on securities (gain on sales of investments, net) of $ 2 , net of tax (income tax expense) of $ (1) . (2) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $ (890) , net of tax (income tax expense) of $85 . (3) Consists of realized gains on securities (gain on sales of investments, net) of $105 , net of tax (income tax expense) of $(30) . (4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $(897) , net of tax (income tax expense) of $91 . For the six months ended June 30, 2019 Unrealized gains on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of December 31, 2018 $ (6,832 ) — (32,864 ) (39,696 ) Other comprehensive income before reclassification adjustments 10,061 — — 10,061 Amounts reclassified from accumulated other comprehensive income (1), (2) (2 ) — 418 416 Net other comprehensive income 10,059 — 418 10,477 Balance as of June 30, 2019 $ 3,227 — (32,446 ) (29,219 ) For the six months ended June 30, 2018 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of December 31, 2017 $ (4,409 ) (691 ) (26,980 ) (32,080 ) Reclassification due to adoption of ASU No. 2018-02 (991 ) (149 ) (5,606 ) (6,746 ) Other comprehensive income/(loss) before reclassification adjustments (5,199 ) 574 — (4,625 ) Amounts reclassified from accumulated other comprehensive income (3), (4) (94 ) — 452 358 Net other comprehensive income/(loss) (5,293 ) 574 452 (4,267 ) Balance as of June 30, 2018 $ (10,693 ) (266 ) (32,134 ) (43,093 ) (1) Consists of realized gain on securities (gain on sales of investments, net) of $3 , net of tax (income tax expense) of $(1) . (2) Consists of amortization of prior service cost (compensation and employee benefits) of $1,161 , and amortization of net loss (compensation and employee benefits) of $1,780 , net of tax (income tax expense) of $167 . (3) Consists of realized gains on securities (gain on sales of investments, net) of $131 , net of tax (income tax expense) of $( 37 ). (4) Consists of amortization of prior service cost (compensation and employee benefits) of $1,161 and amortization of net loss (compensation and employee benefits) of $(1,794) , net of tax (income tax expense) of $181 .

Basis of Presentation and Inf_2

Basis of Presentation and Informational Disclosures (Policies)	6 Months Ended
	Jun. 30, 2019
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 FDIC and the Pennsylvania Department of Banking. Northwest operates 182 community-banking offices throughout Pennsylvania, Western New York, and eastern Ohio. 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, and The Bert Company (doing business as Northwest Insurance Services). 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 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, 2018 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.
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 June 30, 2019 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, 2018 , 2017 , 2016 and 2015 .
Recently Adopted Accounting Standards and Impact of New Accounting Standards	Recent Accounting Pronouncements (a) Recently Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842), which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Accounting Standards Codification ("ASC") Topic 842 establishes a right of use ("ROU") model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases of all classes of underlying assets that have a lease term of 12 months or less and recognizes lease expense for these leases on a straight-line basis over the term of the lease. On January 1, 2019, the Company adopted ASU 2016-02 using a modified retrospective transition approach as of the effective date, January 1, 2019. 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 lease disclosures for periods before the date of adoption (i.e. January 1, 2017). The Company has elected to adopt the package of transition practical expedients and, therefore, has not reassessed (1) whether existing or expired contracts contain a lease, (2) lease classification for existing or expired leases or (3) the accounting for initial direct costs that were previously capitalized. The Company also elected the practical expedient to use hindsight for leases existing at the adoption date. As a result of the adoption of ASU 2016-02, we recognized an operating lease ROU asset of $40.2 million , an operating lease liability of approximately $42.2 million and a cumulative-effect adjustment on retained earnings of $1.2 million on the consolidated statements of financial condition as of January 1, 2019, with no impact on our consolidated statement of income or consolidated statement of cash flows compared to the prior lease accounting model. (b) Recently Issued Accounting Standards In June 2016, the FASB issued ASU 2016-13, " Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments" , which eliminates 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. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets in order to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The income statement under this guidance will reflect the initial recognition of current expected credit losses for newly recognized assets, as well as any increases or decreases of expected credit losses that have occurred during the period. This guidance retains many currently-existing disclosures related to the credit quality of an entity’s assets and the related allowance for credit losses amended to reflect the change to an expected credit loss methodology, as well as enhanced disclosures to provide information to users at a more disaggregated level. Upon adoption, ASU 2016-13 provides for a modified retrospective transition by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is effective, except for debt securities for which other-than-temporary impairment has previously been recognized. For these debt securities, a prospective transition is provided in order to maintain the same amortized cost prior to and subsequent to the effective date of the ASU. This guidance is effective for annual reporting periods beginning after December 15, 2019, and interim periods within those annual periods with early adoption permitted for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. Management has created a formal working group to govern the implementation of these amendments, consisting of key stakeholders from finance, risk, credit and accounting. We are currently in the process of designing current expected credit loss estimation methodologies and systems, and collecting data to be able to comply with the standard. We have engaged with a third party to assist in the development of certain portfolio-level estimation methodologies and have chosen a third-party software platform provider. We are also evaluating the effect this guidance will have on our results of operations, financial position and related disclosures. The impact of the ASU will depend upon the state of the economy and the nature of our portfolios, among other items, at the date of adoption. 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. This guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those years, with early adoption permitted for any removed or modified disclosure requirements. Transition is on a prospective basis for the new and modified disclosures, and on a retrospective basis for disclosures that have been eliminated. We do not expect this guidance to have a material impact on our financial statements. In August 2018, the FASB issued ASU 2018-14, “ Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20) - Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans.” This guidance removes and adds disclosure requirements for defined benefit pension or other post-retirement plans. This guidance is effective for annual periods beginning after December 15, 2020, with early adoption permitted, and requires retrospective adoption for all periods presented. We do not expect this guidance to have a material impact on our financial statements. 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. This guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those years, with early adoption permitted. Transition can either be on a retrospective basis or a prospective basis on all implementation costs incurred after the date of adoption. We are evaluating the impact this new accounting guidance will have on our financial statements.

Acquisition (Tables)

Acquisition (Tables)	6 Months Ended
	Jun. 30, 2019
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 $ 43,288 Cash paid to DFSC 42,500 Total consideration paid 85,788 Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value (1) Cash and cash equivalents $ 16,667 Investment securities available-for-sale 78,594 Loans 407,840 Federal Home Loan Bank stock 453 Premises and equipment 6,520 Core deposit intangible 7,498 Other assets 25,535 Deposits (479,379 ) Other liabilities (15,240 ) Total identifiable net assets $ 48,488 Goodwill $ 37,300 (1) Amounts are estimates and subject to adjustment. Actual amounts are not expected to differ materially from the amounts shown.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lease, Cost	Other information related to leases as of June 30, 2019 was as follows (in thousands): Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flow from operating leases $ 2,692 ROU assets obtained in exchange for lease obligations $ 7,630 Weighted average remaining lease term 15.7 years Weighted average discount rate 3.8 % For the quarter ended June 30, 2019 For the six months ended June 30, 2019 Operating lease costs (office operations) $ 1,382 2,681 Variable lease costs (office operations) 56 190 Total operating lease costs $ 1,438 2,871
Assets And Liabilities, Lessee	Amounts reported in the consolidated statements of financial condition were as follows (in thousands): Operating leases: As of June 30, 2019 Operating lease ROU assets (other assets) $ 45,944 Operating lease liabilities (other liabilities) 48,593
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities by fiscal year for our operating leases are as follows (in thousands): As of June 30, 2019 2019 $ 2,832 2020 5,173 2021 4,841 2022 4,536 2023 4,277 Thereafter 44,878 Total lease payments 66,537 Less amount of lease payments representing interest 17,944 Total present value of lease payments $ 48,593
Schedule of Future Minimum Rental Payments for Operating Leases	As of December 31, 2018 2019 $ 4,677 2020 3,884 2021 3,179 2022 2,465 2023 2,040 Thereafter 7,784 Total lease payments $ 24,029

Investment securities and imp_2

Investment securities and impairment of investment securities (Tables)	6 Months Ended
	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of the portfolio of investment securities available-for-sale	The following table shows the portfolio of investment securities available-for-sale at June 30, 2019 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Debt issued by the U.S. government and agencies: Due in one year or less $ 14,852 75 — 14,927 Debt issued by government sponsored enterprises: Due in one year or less 85,097 92 (165 ) 85,024 Due in one year through five years 85,941 344 (511 ) 85,774 Due in five years through ten years 4,061 44 (123 ) 3,982 Municipal securities: Due in one year or less 1,171 3 — 1,174 Due in one year through five years 3,794 84 — 3,878 Due in five years through ten years 12,597 150 (1 ) 12,746 Due after ten years 13,748 263 — 14,011 Corporate debt issues: Due in five years through ten years 917 — — 917 Residential mortgage-backed securities: Fixed rate pass-through 147,141 1,747 (1,320 ) 147,568 Variable rate pass-through 21,577 896 (4 ) 22,469 Fixed rate agency CMOs 399,260 4,512 (1,583 ) 402,189 Variable rate agency CMOs 60,092 198 (184 ) 60,106 Total residential mortgage-backed securities 628,070 7,353 (3,091 ) 632,332 Total marketable securities available-for-sale $ 850,248 8,408 (3,891 ) 854,765 The following table shows the portfolio of investment securities available-for-sale at December 31, 2018 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Debt issued by the U.S. government and agencies: Due in one year through five years $ 14,756 24 — 14,780 Debt issued by government sponsored enterprises: Due in one year or less 85,089 — (795 ) 84,294 Due in one year through five years 101,078 71 (1,512 ) 99,637 Due after ten years 3,546 — (142 ) 3,404 Municipal securities: Due in one year or less 1,333 2 (6 ) 1,329 Due in one year through five years 3,985 54 (4 ) 4,035 Due in five years through ten years 10,603 60 — 10,663 Due after ten years 5,105 31 — 5,136 Corporate debt issues: Due in five years through ten years 914 — — 914 Residential mortgage-backed securities: Fixed rate pass-through 130,172 568 (4,113 ) 126,627 Variable rate pass-through 24,761 1,003 (5 ) 25,759 Fixed rate agency CMOs 365,427 865 (5,921 ) 360,371 Variable rate agency CMOs 64,246 280 (25 ) 64,501 Total residential mortgage-backed securities 584,606 2,716 (10,064 ) 577,258 Total marketable securities available-for-sale $ 811,015 2,958 (12,523 ) 801,450
Schedule of the portfolio of investment securities held-to-maturity	The following table shows the portfolio of investment securities held-to-maturity at June 30, 2019 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,609 98 — 2,707 Variable rate pass-through 1,469 41 — 1,510 Fixed rate agency CMOs 15,718 114 — 15,832 Variable rate agency CMOs 618 9 — 627 Total residential mortgage-backed securities 20,414 262 — 20,676 Total marketable securities held-to-maturity $ 20,414 262 — 20,676 The following table shows the portfolio of investment securities held-to-maturity at December 31, 2018 (in thousands): Amortized cost Gross unrealized holding gains Gross unrealized holding losses Fair value Residential mortgage-backed securities: Fixed rate pass-through $ 2,896 53 — 2,949 Variable rate pass-through 1,666 39 — 1,705 Fixed rate agency CMOs 17,552 — (422 ) 17,130 Variable rate agency CMOs 651 11 — 662 Total residential mortgage-backed securities 22,765 103 (422 ) 22,446 Total marketable securities held-to-maturity $ 22,765 103 (422 ) 22,446
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 investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at June 30, 2019 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss U.S. government sponsored enterprises $ — — 122,504 (799 ) 122,504 (799 ) Municipal securities 502 (2 ) — — 502 (2 ) Residential mortgage-backed securities - agency 41,395 (381 ) 196,183 (2,711 ) 237,578 (3,092 ) Total temporarily impaired securities $ 41,897 (383 ) 318,687 (3,510 ) 360,584 (3,893 ) The following table shows the fair value of and gross unrealized losses on investment securities, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2018 (in thousands): Less than 12 months 12 months or more Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss U.S. government sponsored enterprises $ — — 136,425 (2,449 ) 136,425 (2,449 ) Municipal securities 929 (1 ) 1,709 (10 ) 2,638 (11 ) Residential mortgage-backed securities - agency 34,031 (30 ) 346,675 (10,456 ) 380,706 (10,486 ) Total temporarily impaired securities $ 34,960 (31 ) 484,809 (12,915 ) 519,769 (12,946 )
Schedule of the cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold	The table below shows a cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold for the quarter ended June 30, (in thousands): 2019 2018 Beginning balance at January 1, (1) $ — 352 Credit losses on debt securities for which other-than-temporary impairment was not previously recognized — — Reduction for losses realized during the quarter — — Reduction for securities sold/called realized during the quarter — (352 ) Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized — — Ending balance at June 30, $ — — (1) The beginning balance represents credit losses included in other-than-temporary impairment charges recognized on debt securities in prior periods.

Loans receivable (Tables)

Loans receivable (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of loans receivable	The following table shows a summary of our loans receivable at June 30, 2019 and December 31, 2018 (in thousands): June 30, 2019 December 31, 2018 Originated Acquired Total Originated Acquired Total Personal Banking: Residential mortgage loans (1) $ 2,799,400 92,372 2,891,772 2,766,430 93,782 2,860,212 Home equity loans 1,041,302 273,645 1,314,947 1,043,878 214,544 1,258,422 Consumer finance loans (2) 1,449 — 1,449 3,817 — 3,817 Consumer loans 938,052 45,217 983,269 775,378 58,671 834,049 Total Personal Banking 4,780,203 411,234 5,191,437 4,589,503 366,997 4,956,500 Commercial Banking: Commercial real estate loans 2,551,548 479,063 3,030,611 2,416,047 223,327 2,639,374 Commercial loans 695,672 64,454 760,126 612,962 48,816 661,778 Total Commercial Banking 3,247,220 543,517 3,790,737 3,029,009 272,143 3,301,152 Total loans receivable, gross 8,027,423 954,751 8,982,174 7,618,512 639,140 8,257,652 Deferred loan costs 44,676 609 45,285 36,820 798 37,618 Allowance for loan losses (48,429 ) (4,678 ) (53,107 ) (51,751 ) (3,463 ) (55,214 ) Undisbursed loan proceeds: Residential mortgage loans (11,187 ) — (11,187 ) (11,513 ) — (11,513 ) Commercial real estate loans (215,132 ) (7,326 ) (222,458 ) (167,029 ) (524 ) (167,553 ) Commercial loans (55,786 ) (1,146 ) (56,932 ) (63,605 ) (1,160 ) (64,765 ) Total loans receivable, net $ 7,741,565 942,210 8,683,775 7,361,434 634,791 7,996,225 (1) There were no loans held for sale at June 30, 2019 and December 31, 2018 . (2) Represents loans from our consumer finance subsidiary that was closed in 2017. Such loans are no longer being originated.
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): June 30, 2019 December 31, 2018 Acquired loans evaluated individually for future credit losses: Outstanding principal balance $ 7,844 8,189 Carrying value 5,324 5,690 Acquired loans evaluated collectively for future credit losses: Outstanding principal balance 952,597 637,170 Carrying value 941,564 632,564 Total acquired loans: Outstanding principal balance 960,441 645,359 Carrying value 946,888 638,254
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 (in thousands): Total Balance at December 31, 2017 $ 1,540 Accretion (785 ) Net reclassification from nonaccretable yield — Balance at December 31, 2018 755 Accretion (267 ) Net reclassification from nonaccretable yield — Balance at June 30, 2019 $ 488
Schedule of the composition of impaired loans by portfolio segment and by class of financing receivable	The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the six months ended June 30, 2019 (in thousands): Carrying value Outstanding principal balance Related impairment reserve Average recorded investment in impaired loans Interest income recognized Personal Banking: Residential mortgage loans $ 950 1,559 3 970 55 Home equity loans 839 1,781 7 923 70 Consumer loans 18 53 4 24 7 Total Personal Banking 1,807 3,393 14 1,917 132 Commercial Banking: Commercial real estate loans 3,439 4,366 4 3,512 133 Commercial loans 78 85 — 78 2 Total Commercial Banking 3,517 4,451 4 3,590 135 Total $ 5,324 7,844 18 5,507 267 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, 2018 (in thousands): Carrying Outstanding Related Average Interest Personal Banking: Residential mortgage loans $ 990 1,598 6 1,294 226 Home equity loans 1,008 1,959 7 1,483 157 Consumer loans 29 76 4 53 35 Total Personal Banking 2,027 3,633 17 2,830 418 Commercial Banking: Commercial real estate loans 3,584 4,471 1 4,028 358 Commercial loans 79 85 — 82 9 Total Commercial Banking 3,663 4,556 1 4,110 367 Total $ 5,690 8,189 18 6,940 785 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 six months ended June 30, 2019 (in thousands): Nonaccrual loans 90 or more days delinquent Nonaccrual loans less than 90 days delinquent Loans less than 90 days delinquent reviewed for impairment TDRs less than 90 days delinquent not included elsewhere Total impaired loans Average recorded investment in impaired loans Interest income recognized on impaired loans Personal Banking: Residential mortgage loans $ 10,617 1,355 505 6,034 18,511 19,486 472 Home equity loans 5,591 1,610 — 1,683 8,884 8,738 286 Consumer finance loan 10 — — — 10 — — Consumer loans 2,892 588 — — 3,480 3,705 152 Total Personal Banking 19,110 3,553 505 7,717 30,885 31,929 910 Commercial Banking: Commercial real estate loans 21,123 14,500 3,361 4,189 43,173 47,684 1,004 Commercial loans 2,920 6,491 222 2,280 11,913 9,765 241 Total Commercial Banking 24,043 20,991 3,583 6,469 55,086 57,449 1,245 Total $ 43,153 24,544 4,088 14,186 85,971 89,378 2,155 The following table provides information related to the composition of originated impaired loans by portfolio segment and by class of financing receivable at and for the year ended December 31, 2018 (in thousands): Nonaccrual loans 90 or more days delinquent Nonaccrual loans less than 90 days delinquent Loans less than 90 days delinquent reviewed for impairment TDRs less than 90 days delinquent not included elsewhere Total impaired loans Average recorded investment in impaired loans Interest income recognized on impaired loans Personal Banking: Residential mortgage loans $ 12,965 2,883 — 6,660 22,508 20,733 910 Home equity loans 5,996 1,079 — 1,818 8,893 9,075 511 Consumer finance loans 22 — — — 22 24 — Consumer loans 3,228 1,072 — — 4,300 3,992 235 Total Personal Banking 22,211 5,034 — 8,478 35,723 33,824 1,656 Commercial Banking: Commercial real estate loans 25,509 11,426 8,549 4,435 49,919 41,328 1,599 Commercial loans 3,010 5,091 2,453 2,087 12,641 9,186 507 Total Commercial Banking 28,519 16,517 11,002 6,522 62,560 50,514 2,106 Total $ 50,730 21,551 11,002 15,000 98,283 84,338 3,762
Schedule of the changes in the allowance for losses on loans receivable	The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the quarter ended June 30, 2019 (in thousands): Balance as of June 30, 2019 Current period provision Charge-offs Recoveries Balance as of Originated loans Personal Banking: Residential mortgage loans $ 3,909 185 (390 ) 109 4,005 Home equity loans 2,990 153 (249 ) 24 3,062 Consumer finance loans 266 (191 ) (58 ) 110 405 Consumer loans 10,500 1,328 (2,472 ) 514 11,130 Total Personal Banking 17,665 1,475 (3,169 ) 757 18,602 Commercial Banking: Commercial real estate loans 20,962 (508 ) (4,147 ) 147 25,470 Commercial loans 9,802 2,937 (874 ) 100 7,639 Total Commercial Banking 30,764 2,429 (5,021 ) 247 33,109 Total originated loans 48,429 3,904 (8,190 ) 1,004 51,711 Acquired loans Personal Banking: Residential mortgage loans 104 — (7 ) 19 92 Home equity loans 344 (16 ) (140 ) 101 399 Consumer loans 511 32 (36 ) 61 454 Total Personal Banking 959 16 (183 ) 181 945 Commercial Banking: Commercial real estate loans 2,571 23 (220 ) 301 2,467 Commercial loans 1,148 724 (213 ) 39 598 Total Commercial Banking 3,719 747 (433 ) 340 3,065 Total acquired loans 4,678 763 (616 ) 521 4,010 Total $ 53,107 4,667 (8,806 ) 1,525 55,721 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the quarter ended June 30, 2018 (in thousands): Balance as of June 30, 2018 Current period provision Charge-offs Recoveries Balance as of March 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 3,657 157 (310 ) 86 3,724 Home equity loans 3,839 272 (241 ) 91 3,717 Consumer finance loans 2,354 (370 ) (486 ) 179 3,031 Consumer loans 9,760 2,543 (2,623 ) 700 9,140 Total Personal Banking 19,610 2,602 (3,660 ) 1,056 19,612 Commercial Banking: Commercial real estate loans 21,019 991 (343 ) 153 20,218 Commercial loans 10,509 1,373 (311 ) 154 9,293 Total Commercial Banking 31,528 2,364 (654 ) 307 29,511 Total originated loans 51,138 4,966 (4,314 ) 1,363 49,123 Acquired loans Personal Banking: Residential mortgage loans 170 74 (79 ) 86 89 Home equity loans 662 56 (165 ) 43 728 Consumer loans 915 139 (59 ) 28 807 Total Personal Banking 1,747 269 (303 ) 157 1,624 Commercial Banking: Commercial real estate loans 3,422 (27 ) (96 ) 115 3,430 Commercial loans 1,025 141 (180 ) 30 1,034 Total Commercial Banking 4,447 114 (276 ) 145 4,464 Total acquired loans 6,194 383 (579 ) 302 6,088 Total $ 57,332 5,349 (4,893 ) 1,665 55,211 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the six months ended June 30, 2019 (in thousands): Balance as of June 30, 2019 Current period provision Charge-offs Recoveries Balance as of December 31, 2018 Originated loans Personal Banking: Residential mortgage loans $ 3,909 372 (739 ) 222 4,054 Home equity loans 2,990 117 (360 ) 49 3,184 Consumer finance loans 266 (419 ) (237 ) 246 676 Other consumer loans 10,500 4,377 (5,280 ) 999 10,404 Total Personal Banking 17,665 4,447 (6,616 ) 1,516 18,318 Commercial Banking: Commercial real estate loans 20,962 (972 ) (4,716 ) 271 26,379 Commercial loans 9,802 3,811 (1,331 ) 268 7,054 Total Commercial Banking 30,764 2,839 (6,047 ) 539 33,433 Total originated loans 48,429 7,286 (12,663 ) 2,055 51,751 Acquired loans Personal Banking: Residential mortgage loans 104 8 (15 ) 28 83 Home equity loans 344 28 (182 ) 150 348 Other consumer loans 511 68 (70 ) 94 419 Total Personal Banking 959 104 (267 ) 272 850 Commercial Banking: Commercial real estate loans 2,571 278 (255 ) 552 1,996 Commercial loans 1,148 3,466 (3,026 ) 91 617 Total Commercial Banking 3,719 3,744 (3,281 ) 643 2,613 Total acquired loans 4,678 3,848 (3,548 ) 915 3,463 Total $ 53,107 11,134 (16,211 ) 2,970 55,214 The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the six months ended June 30, 2018 (in thousands): Balance as of June 30, 2018 Current period provision Charge-offs Recoveries Balance as of December 31, 2017 Originated loans Personal Banking: Residential mortgage loans $ 3,657 187 (506 ) 152 3,824 Home equity loans 3,839 187 (542 ) 122 4,072 Consumer finance loans 2,354 (32 ) (2,039 ) 457 3,968 Other consumer loans 9,760 5,822 (5,799 ) 1,262 8,475 Total Personal Banking 19,610 6,164 (8,886 ) 1,993 20,339 Commercial Banking: Commercial real estate loans 21,019 1,694 (883 ) 297 19,911 Commercial loans 10,509 1,035 (1,140 ) 292 10,322 Total Commercial Banking 31,528 2,729 (2,023 ) 589 30,233 Total originated loans 51,138 8,893 (10,909 ) 2,582 50,572 Acquired loans Personal Banking: Residential mortgage loans 170 32 (84 ) 91 131 Home equity loans 662 258 (475 ) 117 762 Other consumer loans 915 85 (132 ) 72 890 Total Personal Banking 1,747 375 (691 ) 280 1,783 Commercial Banking: Commercial real estate loans 3,422 (157 ) (107 ) 137 3,549 Commercial loans 1,025 447 (376 ) 63 891 Total Commercial Banking 4,447 290 (483 ) 200 4,440 Total acquired loans 6,194 665 (1,174 ) 480 6,223 Total $ 57,332 9,558 (12,083 ) 3,062 56,795
Schedule of loan portfolio by portfolio segment and by class of financing receivable	The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at June 30, 2019 (in thousands): Total loans receivable Allowance for loan losses Nonaccrual loans (1) Loans past due 90 days or more and still accruing (2) TDRs Allowance related to TDRs Additional commitments to customers with loans classified as TDRs Personal Banking: Residential mortgage loans $ 2,899,164 4,013 11,972 — 7,369 776 — Home equity loans 1,314,947 3,334 7,201 55 2,018 459 32 Consumer finance loans 1,449 266 10 — — — — Consumer loans 1,009,975 11,011 3,480 — — — — Total Personal Banking 5,225,535 18,624 22,663 55 9,387 1,235 32 Commercial Banking: Commercial real estate loans 2,808,153 23,533 35,623 — 18,256 1,479 404 Commercial loans 703,194 10,950 9,411 — 3,626 486 25 Total Commercial Banking 3,511,347 34,483 45,034 — 21,882 1,965 429 Total $ 8,736,882 53,107 67,697 55 31,269 3,200 461 (1) Includes $13.4 million of nonaccrual TDRs. (2) Represents loans 90 days or more past maturity and still accruing. The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at December 31, 2018 (in thousands): Total loans receivable Allowance for loan losses Nonaccrual loans (1) Loans past due 90 days or more and still accruing (2) TDRs Allowance related to TDRs Additional commitments to customers with loans classified as TDRs Personal Banking: Residential mortgage loans $ 2,864,470 4,137 15,848 — 5,382 993 — Home equity loans 1,258,422 3,532 7,075 136 4,502 1,520 4 Consumer finance loans 3,817 676 22 3 — — — Consumer loans 855,896 10,823 4,300 27 — — — Total Personal Banking 4,982,605 19,168 27,245 166 9,884 2,513 4 Commercial Banking: Commercial real estate loans 2,471,821 28,375 36,935 — 19,859 313 310 Commercial loans 597,013 7,671 8,101 — 3,865 263 74 Total Commercial Banking 3,068,834 36,046 45,036 — 23,724 576 384 Total $ 8,051,439 55,214 72,281 166 33,608 3,089 388 (1) Includes $15.3 million of nonaccrual TDRs. (2) Represents loans 90 days or more past maturity and still accruing.
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 June 30, 2019 (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 impairment reserve Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,891,404 7,760 7,760 777 — Home equity loans 1,312,929 2,018 2,018 459 — Consumer finance loans 1,449 — — — — Consumer loans 1,009,956 19 19 5 — Total Personal Banking 5,215,738 9,797 9,797 1,241 — Commercial Banking: Commercial real estate loans 2,778,298 29,855 26,741 2,921 3,114 Commercial loans 693,086 10,108 8,901 1,636 1,207 Total Commercial Banking 3,471,384 39,963 35,642 4,557 4,321 Total $ 8,687,122 49,760 45,439 5,798 4,321 The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2018 (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 impairment reserve Loans individually evaluated for impairment for which there is no related reserve Personal Banking: Residential mortgage loans $ 2,856,359 8,111 8,111 747 — Home equity loans 1,256,255 2,167 2,167 523 — Consumer finance loans 3,817 — — — — Consumer loans 855,867 29 29 6 — Total Personal Banking 4,972,298 10,307 10,307 1,276 — Commercial Banking: Commercial real estate loans 2,436,605 35,216 31,830 6,499 3,386 Commercial loans 588,932 8,081 6,738 767 1,343 Total Commercial Banking 3,025,537 43,297 38,568 7,266 4,729 Total $ 7,997,835 53,604 48,875 8,542 4,729
Schedule of roll forward of troubled debt restructurings	The following tables provide a roll forward of troubled debt restructurings for the periods indicated (in thousands): For the quarter ended June 30, 2019 2018 Number of contracts Amount Number of contracts Amount Beginning TDR balance: 195 $ 32,812 200 $ 30,966 New TDRs 2 306 10 861 Re-modified TDRs — — — — Net paydowns — — — (875 ) Charge-offs: Residential mortgage loans — — — — Home equity loans — — — — Commercial real estate loans — — — — Commercial loans — — — — Paid-off loans: Residential mortgage loans 4 (180 ) 1 (6 ) Home equity loans 4 (75 ) 1 (35 ) Commercial real estate loans 6 (1,594 ) 3 (249 ) Commercial loans — — — — Ending TDR balance: 183 $ 31,269 205 $ 30,662 Accruing TDRs $ 17,894 $ 19,802 Non-accrual TDRs 13,375 10,860 For the six months ended June 30, 2019 2018 Number of contracts Amount Number of contracts Amount Beginning TDR balance: 195 $ 33,608 205 $ 32,104 New TDRs 2 306 19 5,796 Re-modified TDRs — — — — Net paydowns — (786 ) — (1,822 ) Charge-offs: Residential mortgage loans — — 1 (135 ) Home equity loans — — — — Commercial real estate loans — — 1 (203 ) Commercial loans — — 1 (721 ) Paid-off loans: Residential mortgage loans 4 (180 ) 2 (255 ) Home equity loans 4 (75 ) 2 (47 ) Commercial real estate loans 6 (1,604 ) 7 (1,823 ) Commercial loans — — 5 (2,232 ) Ending TDR balance: 183 $ 31,269 205 $ 30,662 Accruing TDRs $ 17,894 $ 19,802 Non-accrual TDRs 13,375 10,860
Schedule of troubled debt restructurings (including re-modified TDRs) by portfolio segment and by class of financing receivable	The following tables provide information related to troubled debt restructurings (including re-modified TDRs) by portfolio segment and by class of financing receivable during the periods indicated (in thousands): For the quarter ended June 30, 2019 For the six months ended June 30, 2019 Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Personal Banking: Residential mortgage loans — $ — — — — $ — — — Home equity loans — — — — — — — — Consumer loans — — — — — — — — Total Personal Banking — — — — — — — — Commercial Banking: Commercial real estate loans 1 300 297 32 1 300 297 32 Commercial loans 1 10 9 1 1 10 9 1 Total Commercial Banking 2 310 306 33 2 310 306 33 Total 2 $ 310 306 33 2 $ 310 306 33 No TDRs modified within the previous twelve months have subsequently defaulted. For the quarter ended June 30, 2018 For the six months ended June 30, 2018 Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Number of contracts Recorded investment at the time of modification Current recorded investment Current allowance Personal Banking: Residential mortgage loans 2 $ 60 59 6 4 $ 273 272 27 Home equity loans 5 177 137 37 8 317 275 74 Total Personal Banking 7 237 196 43 12 590 547 101 Commercial Banking: Commercial real estate loans 1 481 481 33 2 2,883 2,852 33 Commercial loans 2 143 142 10 5 2,323 1,508 10 Total Commercial Banking 3 624 623 43 7 5,206 4,360 43 Total 10 $ 861 819 86 19 $ 5,796 4,907 144
Schedule of troubled debt restructurings (including re-modified TDRs) by type of modification by portfolio segment and by class of financing receivable	The following table provides information as of June 30, 2019 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended June 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 1 — 297 — — 297 Commercial loans 1 — — 9 — 9 Total Commercial Banking 2 — 297 9 — 306 Total 2 $ — 297 9 — 306 The following table provides information as of June 30, 2018 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the quarter ended June 30, 2018 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 2 $ 7 — — 52 59 Home equity loans 5 — — 51 86 137 Total Personal Banking 7 7 — 51 138 196 Commercial Banking: Commercial real estate loans 1 — 481 — — 481 Commercial loans 2 — — 142 — 142 Total Commercial Banking 3 — 481 142 — 623 Total 10 $ 7 481 193 138 819 The following table provides information as of June 30, 2019 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the six months ended June 30, 2019 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans — $ — — — — — Home equity loans — — — — — — Consumer loans — — — — — — Total Personal Banking — — — — — — Commercial Banking: Commercial real estate loans 1 — 297 — — 297 Commercial loans 1 — — 9 — 9 Total Commercial Banking 2 — 297 9 — 306 Total 2 $ — 297 9 — 306 The following table provides information as of June 30, 2018 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the six months ended June 30, 2018 (in thousands): Type of modification Number of contracts Rate Payment Maturity date Other Total Personal Banking: Residential mortgage loans 4 $ 7 — 178 87 272 Home equity loans 8 29 — 51 195 275 Consumer loans — — — — — — Total Personal Banking 12 36 — 229 282 547 Commercial Banking: Commercial real estate loans 2 — 481 — 2,371 2,852 Commercial loans 5 — — 142 1,366 1,508 Total Commercial Banking 7 — 481 142 3,737 4,360 Total 19 $ 36 481 371 4,019 4,907
Schedule of re-modified troubled debt restructurings by portfolio segment and by class of financing receivable	The following table provides information related to loan payment delinquencies at June 30, 2019 (in thousands): 30-59 Days delinquent 60-89 Days delinquent 90 Days or greater delinquent Total delinquency Current Total loans receivable 90 Days or greater delinquent and accruing (1) Originated loans Personal Banking: Residential mortgage loans $ 1,562 5,806 9,226 16,594 2,790,198 2,806,792 — Home equity loans 3,327 1,942 4,463 9,732 1,031,570 1,041,302 — Consumer finance loans 130 44 10 184 1,265 1,449 — Consumer loans 7,275 2,702 2,683 12,660 951,489 964,149 — Total Personal Banking 12,294 10,494 16,382 39,170 4,774,522 4,813,692 — Commercial Banking: Commercial real estate loans 2,286 2,551 15,256 20,093 2,316,323 2,336,416 — Commercial loans 559 1,717 2,288 4,564 635,322 639,886 — Total Commercial Banking 2,845 4,268 17,544 24,657 2,951,645 2,976,302 — Total originated loans 15,139 14,762 33,926 63,827 7,726,167 7,789,994 — Acquired loans Personal Banking: Residential mortgage loans 67 458 1,574 2,099 90,273 92,372 183 Home equity loans 1,246 377 1,128 2,751 270,894 273,645 — Consumer loans 225 151 215 591 45,235 45,826 6 Total Personal Banking 1,538 986 2,917 5,441 406,402 411,843 189 Commercial Banking: Commercial real estate loans 132 66 5,867 6,065 465,672 471,737 — Commercial loans 107 8 632 747 62,561 63,308 — Total Commercial Banking 239 74 6,499 6,812 528,233 535,045 — Total acquired loans 1,777 1,060 9,416 12,253 934,635 946,888 189 Total loans $ 16,916 15,822 43,342 76,080 8,660,802 8,736,882 189 (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 on 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 loan delinquencies	The following table provides information related to loan payment delinquencies at June 30, 2019 (in thousands): 30-59 Days delinquent 60-89 Days delinquent 90 Days or greater delinquent Total delinquency Current Total loans receivable 90 Days or greater delinquent and accruing (1) Originated loans Personal Banking: Residential mortgage loans $ 1,562 5,806 9,226 16,594 2,790,198 2,806,792 — Home equity loans 3,327 1,942 4,463 9,732 1,031,570 1,041,302 — Consumer finance loans 130 44 10 184 1,265 1,449 — Consumer loans 7,275 2,702 2,683 12,660 951,489 964,149 — Total Personal Banking 12,294 10,494 16,382 39,170 4,774,522 4,813,692 — Commercial Banking: Commercial real estate loans 2,286 2,551 15,256 20,093 2,316,323 2,336,416 — Commercial loans 559 1,717 2,288 4,564 635,322 639,886 — Total Commercial Banking 2,845 4,268 17,544 24,657 2,951,645 2,976,302 — Total originated loans 15,139 14,762 33,926 63,827 7,726,167 7,789,994 — Acquired loans Personal Banking: Residential mortgage loans 67 458 1,574 2,099 90,273 92,372 183 Home equity loans 1,246 377 1,128 2,751 270,894 273,645 — Consumer loans 225 151 215 591 45,235 45,826 6 Total Personal Banking 1,538 986 2,917 5,441 406,402 411,843 189 Commercial Banking: Commercial real estate loans 132 66 5,867 6,065 465,672 471,737 — Commercial loans 107 8 632 747 62,561 63,308 — Total Commercial Banking 239 74 6,499 6,812 528,233 535,045 — Total acquired loans 1,777 1,060 9,416 12,253 934,635 946,888 189 Total loans $ 16,916 15,822 43,342 76,080 8,660,802 8,736,882 189 (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 on 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. The following table provides information related to loan payment delinquencies at December 31, 2018 (in thousands): 30-59 Days delinquent 60-89 Days delinquent 90 Days or greater delinquent Total delinquency Current Total loans receivable 90 Days or Originated loans Personal Banking: Residential mortgage loans $ 27,245 5,732 11,668 44,645 2,714,474 2,759,119 — Home equity loans 6,810 1,771 4,825 13,406 1,030,472 1,043,878 — Consumer finance loans 661 172 21 854 2,963 3,817 — Consumer loans 9,000 2,867 3,037 14,904 793,092 807,996 — Total Personal Banking 43,716 10,542 19,551 73,809 4,541,001 4,614,810 — Commercial Banking: Commercial real estate loans 5,391 4,801 21,721 31,913 2,217,105 2,249,018 — Commercial loans 609 560 2,714 3,883 545,474 549,357 — Total Commercial Banking 6,000 5,361 24,435 35,796 2,762,579 2,798,375 — Total originated loan 49,716 15,903 43,986 109,605 7,303,580 7,413,185 — Acquired loans Personal Banking: Residential mortgage loans 532 693 1,317 2,542 91,240 93,782 19 Home equity loans 1,839 294 1,212 3,345 211,199 214,544 40 Consumer loans 447 175 196 818 58,651 59,469 6 Total Personal Banking 2,818 1,162 2,725 6,705 361,090 367,795 65 Commercial Banking: Commercial real estate loans 112 586 3,866 4,564 218,239 222,803 78 Commercial loans 364 — 296 660 46,996 47,656 — Total Commercial Banking 476 586 4,162 5,224 265,235 270,459 78 Total acquired loan 3,294 1,748 6,887 11,929 626,325 638,254 143 Total $ 53,010 17,651 50,873 121,534 7,929,905 8,051,439 143 (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	The following table sets forth information about credit quality indicators updated during the six months ended June 30, 2019 (in thousands): Pass Special mention Substandard Doubtful Loss Total loans receivable Originated loans Personal Banking: Residential mortgage loans $ 2,799,431 — 7,361 — — 2,806,792 Home equity loans 1,035,922 — 5,380 — — 1,041,302 Consumer finance loans 1,449 — — — — 1,449 Consumer loans 960,968 — 3,181 — — 964,149 Total Personal Banking 4,797,770 — 15,922 — — 4,813,692 Commercial Banking: Commercial real estate loans 2,152,525 80,607 103,103 181 — 2,336,416 Commercial loans 567,069 35,914 35,921 982 — 639,886 Total Commercial Banking 2,719,594 116,521 139,024 1,163 — 2,976,302 Total originated loans 7,517,364 116,521 154,946 1,163 — 7,789,994 Acquired loans Personal Banking: Residential mortgage loans 91,041 — 1,331 — — 92,372 Home equity loans 271,965 — 1,680 — — 273,645 Consumer loans 45,396 — 430 — — 45,826 Total Personal Banking 408,402 — 3,441 — — 411,843 Commercial Banking: Commercial real estate loans 433,487 5,828 32,422 — — 471,737 Commercial loans 54,821 2,267 6,220 — — 63,308 Total Commercial Banking 488,308 8,095 38,642 — — 535,045 Total acquired loans 896,710 8,095 42,083 — — 946,888 Total loans $ 8,414,074 124,616 197,029 1,163 — 8,736,882 The following table sets forth information about credit quality indicators, which were updated during the year ended December 31, 2018 (in thousands): Pass Special mention Substandard Doubtful Loss Total loans receivable Originated loans Personal Banking: Residential mortgage loans $ 2,749,266 — 9,853 — — 2,759,119 Home equity loans 1,038,245 — 5,633 — — 1,043,878 Consumer finance loans 3,817 — — — — 3,817 Consumer loans 804,075 — 3,921 — — 807,996 Total Personal Banking 4,595,403 — 19,407 — — 4,614,810 Commercial Banking: Commercial real estate loans 2,062,728 91,142 95,148 — — 2,249,018 Commercial loans 503,665 15,760 29,932 — — 549,357 Total Commercial Banking 2,566,393 106,902 125,080 — — 2,798,375 Total originated loans 7,161,796 106,902 144,487 — — 7,413,185 Acquired loans Personal Banking: Residential mortgage loans 92,625 — 1,157 — — 93,782 Home equity loans 213,273 — 1,271 — — 214,544 Consumer loans 58,954 — 515 — — 59,469 Total Personal Banking 364,852 — 2,943 — — 367,795 Commercial Banking: Commercial real estate loans 191,622 3,546 27,635 — — 222,803 Commercial loans 35,397 3,521 8,738 — — 47,656 Total Commercial Banking 227,019 7,067 36,373 — — 270,459 Total acquired loans 591,871 7,067 39,316 — — 638,254 Total $ 7,753,667 113,969 183,803 — — 8,051,439

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 December 31, 2018 Amortizable intangible assets: Core deposit intangibles - gross $ 63,685 63,685 Acquisitions 7,498 — Less: accumulated amortization (47,934 ) (45,027 ) Core deposit intangibles - net 23,249 18,658 Customer and Contract intangible assets - gross 10,474 10,474 Less: accumulated amortization (9,611 ) (9,311 ) Customer and Contract intangible assets - net 863 1,163 Total intangible assets - net $ 24,112 19,821
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 June 30, 2019 and 2018 , 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 June 30, 2019 $ 1,760 For the quarter ended June 30, 2018 1,520 For the six months ended June 30, 2019 3,207 For the six months ended June 30, 2018 3,040 For the year ending December 31, 2019 6,718 For the year ending December 31, 2020 5,535 For the year ending December 31, 2021 4,438 For the year ending December 31, 2022 3,438 For the year ending December 31, 2023 2,561 For the year ending December 31, 2024 1,876
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, 2017 $ 307,420 Goodwill from acquisition — Balance at December 31, 2018 307,420 Goodwill from acquisition 37,300 Balance at June 30, 2019 $ 344,720

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	he computation of basic and diluted earnings per share (in thousands, except share data and per share amounts): Quarter ended June 30, Six months ended June 30, 2019 2018 2019 2018 Reported net income $ 26,383 26,299 51,427 51,284 Weighted average common shares outstanding 105,233,635 101,870,043 104,173,601 101,735,235 Dilutive potential shares due to effect of stock options 1,024,580 1,554,111 1,208,669 1,545,885 Total weighted average common shares and dilutive potential shares 106,258,215 103,424,154 105,382,270 103,281,120 Basic earnings per share: $ 0.25 0.26 0.49 0.50 Diluted earnings per share: $ 0.25 0.25 0.49 0.50

Pension and Other Post-retire_2

Pension and Other Post-retirement Benefits (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, Pension benefits Other post-retirement benefits 2019 2018 2019 2018 Service cost $ 1,274 1,716 — — Interest cost 1,851 1,678 13 13 Expected return on plan assets (2,759 ) (2,992 ) — — Amortization of prior service cost (580 ) (580 ) — — Amortization of the net loss 873 872 17 25 Net periodic cost $ 659 694 30 38 Six months ended June 30, Pension benefits Other post-retirement benefits 2019 2018 2019 2018 Service cost $ 2,549 3,432 — — Interest cost 3,703 3,356 26 27 Expected return on plan assets (5,519 ) (5,984 ) — — Amortization of prior service cost (1,161 ) (1,161 ) — — Amortization of the net loss 1,746 1,745 34 49 Net periodic cost $ 1,318 1,388 60 76

Disclosures About Fair Value _2

Disclosures About Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 (in thousands): Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 106,988 106,988 106,988 — — Securities available-for-sale 854,765 854,765 — 854,765 — Securities held-to-maturity 20,414 20,676 — 20,676 — Loans receivable, net 8,683,775 8,627,759 — — 8,627,759 Accrued interest receivable 28,742 28,742 28,742 — — Interest rate swaps 18,420 18,420 — 18,420 — FHLB stock 14,966 14,966 — — — Total financial assets $ 9,728,070 9,672,316 135,730 893,861 8,627,759 Financial liabilities: Savings and checking deposits $ 7,083,521 7,083,521 7,083,521 — — Time deposits 1,600,372 1,599,989 — — 1,599,989 Borrowed funds 171,677 171,677 171,677 — — Junior subordinated debentures 121,757 115,124 — — 115,124 Interest rate swaps 18,472 18,472 — 18,472 — Accrued interest payable 1,207 1,207 1,207 — — Total financial liabilities $ 8,997,006 8,989,990 7,256,405 18,472 1,715,113 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, 2018 (in thousands): Carrying amount Estimated fair value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 68,789 68,789 68,789 — — Securities available-for-sale 801,450 801,450 — 801,450 — Securities held-to-maturity 22,765 22,446 — 22,446 — Loans receivable, net 7,996,225 7,845,313 — — 7,845,313 Accrued interest receivable 24,490 24,490 24,490 — — Interest rate swaps 6,445 6,445 — 6,445 — FHLB stock 15,635 15,635 — — — Total financial assets $ 8,935,799 8,784,568 93,279 830,341 7,845,313 Financial liabilities: Savings and checking accounts $ 6,489,338 6,489,338 6,489,338 — — Time deposits 1,404,841 1,434,410 — — 1,434,410 Borrowed funds 234,389 234,389 234,389 — — Junior subordinated debentures 111,213 102,572 — — 102,572 Interest rate swaps 6,445 6,445 — 6,445 — Accrued interest payable 744 744 744 — — Total financial liabilities $ 8,246,970 8,267,898 6,724,471 6,445 1,536,982
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 June 30, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Debt securities: U.S. government and agencies $ — 14,927 — 14,927 Government sponsored enterprises — 174,780 — 174,780 States and political subdivisions — 31,809 — 31,809 Corporate — 917 — 917 Total debt securities — 222,433 — 222,433 Residential mortgage-backed securities: GNMA — 26,009 — 26,009 FNMA — 87,434 — 87,434 FHLMC — 56,583 — 56,583 Non-agency — 11 — 11 Collateralized mortgage obligations: GNMA — 104,153 — 104,153 FNMA — 214,388 — 214,388 FHLMC — 143,754 — 143,754 Total mortgage-backed securities — 632,332 — 632,332 Interest rate swaps — 18,420 — 18,420 Total assets $ — 873,185 — 873,185 Interest rate swaps $ — 18,472 — 18,472 Total liabilities $ — 18,472 — 18,472 The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2018 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Debt securities: U.S. government and agencies $ — 14,780 — 14,780 Government sponsored enterprises — 187,335 — 187,335 States and political subdivisions — 21,163 — 21,163 Corporate — 914 — 914 Total debt securities — 224,192 — 224,192 Residential mortgage-backed securities: GNMA — 27,041 — 27,041 FNMA — 73,196 — 73,196 FHLMC — 51,621 — 51,621 Non-agency — 528 — 528 Collateralized mortgage obligations: GNMA — 52,331 — 52,331 FNMA — 207,033 — 207,033 FHLMC — 165,508 — 165,508 Total mortgage-backed securities — 577,258 — 577,258 Interest rate swaps — 6,445 — 6,445 Total assets $ — 807,895 — 807,895 Interest rate swaps $ — 6,445 — 6,445 Total liabilities $ — 6,445 — 6,445
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 June 30, 2019 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Loans measured for impairment $ — — 39,642 39,642 Real estate owned — — 2,070 2,070 Total assets $ — — 41,712 41,712 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, 2018 (in thousands): Level 1 Level 2 Level 3 Total assets at fair value Loans measured for impairment $ — — 40,333 40,333 Real estate owned — — 2,498 2,498 Total assets $ — — 42,831 42,831
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 June 30, 2019 (in thousands): Fair value Valuation techniques Significant unobservable inputs Range (weighted average) Loans measured for impairment $ 39,642 Appraisal value (1) Estimated cost to sell 10.0% Discounted cash flow Discount rate 4.25% to 11.0% (7.50%) Real estate owned $ 2,070 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)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative financial 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 June 30, 2019 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 281,602 18,507 281,602 18,559 Total derivatives $ 281,602 18,507 281,602 18,559 At December 31, 2018 Derivatives not designated as hedging instruments: Interest rate swap agreements $ 221,919 6,445 221,919 6,445 Total derivatives $ 221,919 6,445 221,919 6,445
Derivative instruments gain (loss)	The following table presents income or expense recognized on derivatives for the periods indicated (in thousands): For the quarter ended June 30, For the six months ended June 30, 2019 2018 2019 2018 Hedging interest rate derivatives: Increase in interest expense $ — 267 — 600 Non-hedging swap derivatives: Increase in other income — (417 ) — (288 )

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of changes in accumulated other comprehensive income by component	The following tables show the changes in accumulated other comprehensive income/(loss) by component for the periods indicated (in thousands): For the quarter ended June 30, 2019 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of March 31, 2019 $ (2,380 ) — (32,655 ) (35,035 ) Other comprehensive income before reclassification adjustments 5,608 — — 5,608 Amounts reclassified from accumulated other comprehensive income (1), (2) (1 ) — 209 208 Net other comprehensive income 5,607 — 209 5,816 Balance as of June 30, 2019 $ 3,227 — (32,446 ) (29,219 ) For the quarter ended June 30, 2018 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of March 31, 2018 $ (9,381 ) (480 ) (32,360 ) (42,221 ) Other comprehensive income/(loss) before reclassification adjustments (1,237 ) 214 — (1,023 ) Amounts reclassified from accumulated other comprehensive income (3), (4) (75 ) — 226 151 Net other comprehensive income/(loss) (1,312 ) 214 226 (872 ) Balance as of June 30, 2018 $ (10,693 ) (266 ) (32,134 ) (43,093 ) (1) Consists of realized gain on securities (gain on sales of investments, net) of $ 2 , net of tax (income tax expense) of $ (1) . (2) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $ (890) , net of tax (income tax expense) of $85 . (3) Consists of realized gains on securities (gain on sales of investments, net) of $105 , net of tax (income tax expense) of $(30) . (4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $(897) , net of tax (income tax expense) of $91 . For the six months ended June 30, 2019 Unrealized gains on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of December 31, 2018 $ (6,832 ) — (32,864 ) (39,696 ) Other comprehensive income before reclassification adjustments 10,061 — — 10,061 Amounts reclassified from accumulated other comprehensive income (1), (2) (2 ) — 418 416 Net other comprehensive income 10,059 — 418 10,477 Balance as of June 30, 2019 $ 3,227 — (32,446 ) (29,219 ) For the six months ended June 30, 2018 Unrealized gains and (losses) on securities available- for-sale Change in fair value of interest rate swaps Change in defined benefit pension plans Total Balance as of December 31, 2017 $ (4,409 ) (691 ) (26,980 ) (32,080 ) Reclassification due to adoption of ASU No. 2018-02 (991 ) (149 ) (5,606 ) (6,746 ) Other comprehensive income/(loss) before reclassification adjustments (5,199 ) 574 — (4,625 ) Amounts reclassified from accumulated other comprehensive income (3), (4) (94 ) — 452 358 Net other comprehensive income/(loss) (5,293 ) 574 452 (4,267 ) Balance as of June 30, 2018 $ (10,693 ) (266 ) (32,134 ) (43,093 ) (1) Consists of realized gain on securities (gain on sales of investments, net) of $3 , net of tax (income tax expense) of $(1) . (2) Consists of amortization of prior service cost (compensation and employee benefits) of $1,161 , and amortization of net loss (compensation and employee benefits) of $1,780 , net of tax (income tax expense) of $167 . (3) Consists of realized gains on securities (gain on sales of investments, net) of $131 , net of tax (income tax expense) of $( 37 ). (4) Consists of amortization of prior service cost (compensation and employee benefits) of $1,161 and amortization of net loss (compensation and employee benefits) of $(1,794) , net of tax (income tax expense) of $181 .

Basis of Presentation and Inf_3

Basis of Presentation and Informational Disclosures (Details)	May 22, 2019$ / sharesshares	Jun. 30, 2019USD ($)bank	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)bank	Jun. 30, 2018USD ($)	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)
Stock Related Compensation
Number of banking locations | bank		182		182
Options exercise price (in dollars per share) | $ / shares	$ 17.27
Options weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.14
Stock-based compensation expense		$ 2,500,000	$ 2,300,000	$ 3,700,000	$ 3,300,000
Unrecognized tax benefits liability		0		0
Operating lease ROU assets (other assets)		45,944,000		45,944,000
Operating lease liability		48,593,000		48,593,000
Retained earnings		562,799,000		562,799,000			$ 550,374,000
Accounting Standards Update 2016-02
Stock Related Compensation
Operating lease ROU assets (other assets)						$ 40,200,000
Operating lease liability						42,200,000
Retained earnings						$ 1,200,000
Employee Stock Option
Stock Related Compensation
Award vesting period	7 years
Compensation expense yet to be recognized		4,100,000		4,100,000
Restricted Stock
Stock Related Compensation
Restricted common shares weighted average grant date fair value (in dollars per share) | $ / shares	$ 17.27
Common stock
Stock Related Compensation
Compensation expense yet to be recognized		$ 19,700,000		$ 19,700,000
Employees
Stock Related Compensation
Options granted (in shares) | shares	547,410
Employees | Restricted Stock
Stock Related Compensation
Restricted common shares granted (in shares) | shares	256,800
Director
Stock Related Compensation
Options granted (in shares) | shares	64,800
Director | Restricted Stock
Stock Related Compensation
Restricted common shares granted (in shares) | shares	24,300

Acquisition - Narrative (Detail

Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands	Mar. 08, 2019USD ($)shareholderoffice$ / sharesshares	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)
Acquisition
Cash paid to DFSC		$ 42,500	$ 0
Donegal Financial Services Corporation
Acquisition
Total consideration	$ 85,788
Number of offices acquired | office	12
Number of counterparty shareholders | shareholder	2
Cash as percent of total consideration	50.00%
Stock as percent of total consideration	50.00%
Cash paid to DFSC	$ 42,500
Stock issued for acquisition (in shares) | shares	2,462,373
Value of stock issued for purchase	$ 43,288
Closing price of Company's stock issued for purchase (in dollars per share) | $ / shares	$ 17.58
Additional cost expensed		$ 3,000
Core Deposits | Donegal Financial Services Corporation
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	Mar. 08, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Consideration paid:
Cash paid to DFSC		$ 42,500	$ 0
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value
Goodwill		$ 344,720		$ 307,420	$ 307,420
Donegal Financial Services Corporation
Consideration paid:
Northwest Bancshares, Inc. common stock issued	$ 43,288
Cash paid to DFSC	42,500
Total consideration paid	85,788
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value
Cash and cash equivalents	16,667
Investment securities available-for-sale	78,594
Loans	407,840
Federal Home Loan Bank stock	453
Premises and equipment	6,520
Core deposit intangible	7,498
Other assets	25,535
Deposits	(479,379)
Other liabilities	(15,240)
Total identifiable net assets	48,488
Goodwill	$ 37,300

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	Jun. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Undiscounted payments for leases not yet commenced	$ 3.4
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term of contract (up to)	35 years
Lease renewal term	10 years

Leases - Schedule of Lease Cost

Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease costs (office operations)	$ 1,382	$ 2,681
Variable lease costs (office operations)	56	190
Total operating lease costs	$ 1,438	$ 2,871

Leases - Schedule of Lease Asse

Leases - Schedule of Lease Assets and Liabilities (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating lease ROU assets (other assets)	$ 45,944
Operating lease liability	$ 48,593

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating cash flow from operating leases	$ 2,692
ROU assets obtained in exchange for lease obligations	$ 7,630
Weighted average remaining lease term	15 years 8 months 12 days
Weighted average discount rate	3.80%

Leases - Schedule of Lease Matu

Leases - Schedule of Lease Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	$ 2,832
2020	5,173
2021	4,841
2022	4,536
2023	4,277
Thereafter	44,878
Total lease payments	66,537
Less amount of lease payments representing interest	17,944
Total present value of lease payments	$ 48,593
Lease Maturities Before Topic 842
2019		$ 4,677
2020		3,884
2021		3,179
2022		2,465
2023		2,040
Thereafter		7,784
Total lease payments		$ 24,029

Investment securities and imp_3

Investment securities and impairment of investment securities - Available For Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized cost
Residential mortgage-backed securities	$ 850,248	$ 811,015
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	8,408	2,958
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(3,891)	(12,523)
Fair value
Securities available-for-sale	854,765	801,450
U.S. government and agencies
Amortized cost
Due in one year or less	14,852
Due in one year through five years		14,756
Gross unrealized holding gains
Due in one year or less	75
Due in one year through five years		24
Gross unrealized holding losses
Due in one year or less	0
Due in one year through five years		0
Fair value
Due in one year or less	14,927
Due in one year through five years		14,780
Debt issued by government sponsored enterprises:
Amortized cost
Due in one year or less	85,097	85,089
Due in one year through five years	85,941	101,078
Due in five years through ten years	4,061
Due after ten years		3,546
Gross unrealized holding gains
Due in one year or less	92	0
Due in one year through five years	344	71
Due in five years through ten years	44
Due after ten years		0
Gross unrealized holding losses
Due in one year or less	(165)	(795)
Due in one year through five years	(511)	(1,512)
Due in five years through ten years	(123)
Due after ten years		(142)
Fair value
Due in one year or less	85,024	84,294
Due in one year through five years	85,774	99,637
Due in five years through ten years	3,982
Due after ten years		3,404
Municipal securities
Amortized cost
Due in one year or less	1,171	1,333
Due in one year through five years	3,794	3,985
Due in five years through ten years	12,597	10,603
Due after ten years	13,748	5,105
Gross unrealized holding gains
Due in one year or less	3	2
Due in one year through five years	84	54
Due in five years through ten years	150	60
Due after ten years	263	31
Gross unrealized holding losses
Due in one year or less	0	(6)
Due in one year through five years	0	(4)
Due in five years through ten years	(1)	0
Due after ten years	0	0
Fair value
Due in one year or less	1,174	1,329
Due in one year through five years	3,878	4,035
Due in five years through ten years	12,746	10,663
Due after ten years	14,011	5,136
Corporate debt securities
Amortized cost
Due in five years through ten years	917	914
Gross unrealized holding gains
Due in five years through ten years	0	0
Gross unrealized holding losses
Due in five years through ten years	0	0
Fair value
Due in five years through ten years	917	914
Residential mortgage-backed securities
Amortized cost
Residential mortgage-backed securities	628,070	584,606
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	7,353	2,716
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(3,091)	(10,064)
Fair value
Securities available-for-sale	632,332	577,258
Fixed rate | Pass-through
Amortized cost
Residential mortgage-backed securities	147,141	130,172
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	1,747	568
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,320)	(4,113)
Fair value
Securities available-for-sale	147,568	126,627
Fixed rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	399,260	365,427
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	4,512	865
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(1,583)	(5,921)
Fair value
Securities available-for-sale	402,189	360,371
Variable rate | Pass-through
Amortized cost
Residential mortgage-backed securities	21,577	24,761
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	896	1,003
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(4)	(5)
Fair value
Securities available-for-sale	22,469	25,759
Variable rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	60,092	64,246
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	198	280
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(184)	(25)
Fair value
Securities available-for-sale	$ 60,106	$ 64,501

Investment securities and imp_4

Investment securities and impairment of investment securities - Held To Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized cost
Marketable securities held-to-maturity, amortized cost	$ 20,414	$ 22,765
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	262	103
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	(422)
Fair value
Marketable securities held-to-maturity, fair value	20,676	22,446
Residential mortgage-backed securities
Amortized cost
Marketable securities held-to-maturity, amortized cost	20,414	22,765
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	262	103
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	(422)
Fair value
Marketable securities held-to-maturity, fair value	20,676	22,446
Fixed rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	2,609	2,896
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	98	53
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	2,707	2,949
Fixed rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	15,718	17,552
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	114	0
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	(422)
Fair value
Marketable securities held-to-maturity, fair value	15,832	17,130
Variable rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	1,469	1,666
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	41	39
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	1,510	1,705
Variable rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	618	651
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	9	11
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	$ 627	$ 662

Investment securities and imp_5

Investment securities and impairment of investment securities - Fair Value of and Gross Unrealized Losses on Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Marketable securities
Less than 12 months - Fair value	$ 41,897	$ 34,960
Less than 12 months - Unrealized loss	(383)	(31)
12 months or more - Fair value	318,687	484,809
12 months or more - Unrealized loss	(3,510)	(12,915)
Total - Fair value	360,584	519,769
Total - Unrealized loss	(3,893)	(12,946)
U.S. government and agencies
Marketable securities
Less than 12 months - Fair value	0	0
Less than 12 months - Unrealized loss	0	0
12 months or more - Fair value	122,504	136,425
12 months or more - Unrealized loss	(799)	(2,449)
Total - Fair value	122,504	136,425
Total - Unrealized loss	(799)	(2,449)
Municipal securities
Marketable securities
Less than 12 months - Fair value	502	929
Less than 12 months - Unrealized loss	(2)	(1)
12 months or more - Fair value	0	1,709
12 months or more - Unrealized loss	0	(10)
Total - Fair value	502	2,638
Total - Unrealized loss	(2)	(11)
Residential mortgage-backed securities | Agency CMOs
Marketable securities
Less than 12 months - Fair value	41,395	34,031
Less than 12 months - Unrealized loss	(381)	(30)
12 months or more - Fair value	196,183	346,675
12 months or more - Unrealized loss	(2,711)	(10,456)
Total - Fair value	237,578	380,706
Total - Unrealized loss	$ (3,092)	$ (10,486)

Investment securities and imp_6

Investment securities and impairment of investment securities - Cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cumulative roll forward of credit related impairment losses recognized in earnings for debt securities held and not intended to be sold:
Beginning balance	$ 0	$ 352
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	0	0
Reduction for losses realized during the quarter	0	0
Reduction for securities sold/called realized during the quarter	0	(352)
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	0	0
Ending balance	$ 0	$ 0

Loans receivable - Summary of O

Loans receivable - Summary of Originated and Acquired Loans (Details) - USD ($)	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 8,982,174,000		$ 8,257,652,000
Deferred loan costs	45,285,000		37,618,000
Allowance for loan losses	(53,107,000)	$ (55,721,000)	(55,214,000)	$ (57,332,000)	$ (55,211,000)	$ (56,795,000)
Total loans receivable, net	8,683,775,000		7,996,225,000
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(11,187,000)		(11,513,000)
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(222,458,000)		(167,553,000)
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(56,932,000)		(64,765,000)
Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	5,191,437,000		4,956,500,000
Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,891,772,000		2,860,212,000
Residential mortgage loans held-for-sale	0		0
Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,314,947,000		1,258,422,000
Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,449,000		3,817,000
Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	983,269,000		834,049,000
Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,790,737,000		3,301,152,000
Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,030,611,000		2,639,374,000
Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	760,126,000		661,778,000
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	8,027,423,000		7,618,512,000
Deferred loan costs	44,676,000		36,820,000
Allowance for loan losses	(48,429,000)	(51,711,000)	(51,751,000)	(51,138,000)	(49,123,000)	(50,572,000)
Total loans receivable, net	7,741,565,000		7,361,434,000
Originated | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(11,187,000)		(11,513,000)
Originated | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(215,132,000)		(167,029,000)
Originated | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(55,786,000)		(63,605,000)
Originated | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	4,780,203,000		4,589,503,000
Allowance for loan losses	(17,665,000)	(18,602,000)	(18,318,000)	(19,610,000)	(19,612,000)	(20,339,000)
Originated | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,799,400,000		2,766,430,000
Allowance for loan losses	(3,909,000)	(4,005,000)	(4,054,000)	(3,657,000)	(3,724,000)	(3,824,000)
Originated | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,041,302,000		1,043,878,000
Allowance for loan losses	(2,990,000)	(3,062,000)	(3,184,000)	(3,839,000)	(3,717,000)	(4,072,000)
Originated | Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,449,000		3,817,000
Allowance for loan losses	(266,000)	(405,000)	(676,000)	(2,354,000)	(3,031,000)	(3,968,000)
Originated | Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	938,052,000		775,378,000
Allowance for loan losses	(10,500,000)	(11,130,000)	(10,404,000)	(9,760,000)	(9,140,000)	(8,475,000)
Originated | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,247,220,000		3,029,009,000
Allowance for loan losses	(30,764,000)	(33,109,000)	(33,433,000)	(31,528,000)	(29,511,000)	(30,233,000)
Originated | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,551,548,000		2,416,047,000
Allowance for loan losses	(20,962,000)	(25,470,000)	(26,379,000)	(21,019,000)	(20,218,000)	(19,911,000)
Originated | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	695,672,000		612,962,000
Allowance for loan losses	(9,802,000)	(7,639,000)	(7,054,000)	(10,509,000)	(9,293,000)	(10,322,000)
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	954,751,000		639,140,000
Deferred loan costs	609,000		798,000
Allowance for loan losses	(4,678,000)	(4,010,000)	(3,463,000)	(6,194,000)	(6,088,000)	(6,223,000)
Total loans receivable, net	942,210,000		634,791,000
Acquired | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	0		0
Acquired | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(7,326,000)		(524,000)
Acquired | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(1,146,000)		(1,160,000)
Acquired | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	411,234,000		366,997,000
Allowance for loan losses	(959,000)	(945,000)	(850,000)	(1,747,000)	(1,624,000)	(1,783,000)
Acquired | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	92,372,000		93,782,000
Allowance for loan losses	(104,000)	(92,000)	(83,000)	(170,000)	(89,000)	(131,000)
Acquired | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	273,645,000		214,544,000
Allowance for loan losses	(344,000)	(399,000)	(348,000)	(662,000)	(728,000)	(762,000)
Acquired | Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	0		0
Acquired | Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	45,217,000		58,671,000
Allowance for loan losses	(511,000)	(454,000)	(419,000)	(915,000)	(807,000)	(890,000)
Acquired | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	543,517,000		272,143,000
Allowance for loan losses	(3,719,000)	(3,065,000)	(2,613,000)	(4,447,000)		(4,440,000)
Acquired | Commercial Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(3,422,000)	(3,430,000)
Acquired | Commercial Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(1,025,000)	(1,034,000)
Acquired | Commercial Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(4,447,000)	$ (4,464,000)
Acquired | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	479,063,000		223,327,000
Allowance for loan losses	(2,571,000)	(2,467,000)	(1,996,000)	(3,422,000)		(3,549,000)
Acquired | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	64,454,000		48,816,000
Allowance for loan losses	$ (1,148,000)	$ (598,000)	$ (617,000)	$ (1,025,000)		$ (891,000)

Loans receivable - Outstanding

Loans receivable - Outstanding Principal Balance and Related Carrying Value of Acquired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 960,441	$ 645,359
Carrying value	946,888	638,254
Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	7,844	8,189
Carrying value	5,324	5,690
Acquired loans evaluated collectively for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	952,597	637,170
Carrying value	$ 941,564	$ 632,564

Loans receivable - Changes in t

Loans receivable - Changes in the Accretable Discount (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Changes in accretable yield
Beginning balance	$ 755	$ 1,540
Accretion	(267)	(785)
Net reclassification from nonaccretable yield	0	0
Ending balance	$ 488	$ 755

Loans receivable - Composition

Loans receivable - Composition of Acquired Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	$ 85,971	$ 98,283
Average recorded investment in impaired loans	89,378	84,338
Interest income recognized	2,155	3,762
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	30,885	35,723
Average recorded investment in impaired loans	31,929	33,824
Interest income recognized	910	1,656
Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	18,511	22,508
Average recorded investment in impaired loans	19,486	20,733
Interest income recognized	472	910
Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	8,884	8,893
Average recorded investment in impaired loans	8,738	9,075
Interest income recognized	286	511
Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	3,480	4,300
Average recorded investment in impaired loans	3,705	3,992
Interest income recognized	152	235
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	55,086	62,560
Average recorded investment in impaired loans	57,449	50,514
Interest income recognized	1,245	2,106
Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	43,173	49,919
Average recorded investment in impaired loans	47,684	41,328
Interest income recognized	1,004	1,599
Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	11,913	12,641
Average recorded investment in impaired loans	9,765	9,186
Interest income recognized	241	507
Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	5,324	5,690
Outstanding principal balance	7,844	8,189
Related impairment reserve	18	18
Average recorded investment in impaired loans	5,507	6,940
Interest income recognized	267	785
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	1,807	2,027
Outstanding principal balance	3,393	3,633
Related impairment reserve	14	17
Average recorded investment in impaired loans	1,917	2,830
Interest income recognized	132	418
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	950	990
Outstanding principal balance	1,559	1,598
Related impairment reserve	3	6
Average recorded investment in impaired loans	970	1,294
Interest income recognized	55	226
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	839	1,008
Outstanding principal balance	1,781	1,959
Related impairment reserve	7	7
Average recorded investment in impaired loans	923	1,483
Interest income recognized	70	157
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	18	29
Outstanding principal balance	53	76
Related impairment reserve	4	4
Average recorded investment in impaired loans	24	53
Interest income recognized	7	35
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	3,517	3,663
Outstanding principal balance	4,451	4,556
Related impairment reserve	4	1
Average recorded investment in impaired loans	3,590	4,110
Interest income recognized	135	367
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	3,439	3,584
Outstanding principal balance	4,366	4,471
Related impairment reserve	4	1
Average recorded investment in impaired loans	3,512	4,028
Interest income recognized	133	358
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	79
Outstanding principal balance	85	85
Related impairment reserve	0	0
Average recorded investment in impaired loans	78	82
Interest income recognized	$ 2	$ 9

Loans receivable - Changes in_2

Loans receivable - Changes in the Allowance for Losses on Loans Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	$ 55,721	$ 55,211	$ 55,214	$ 56,795
Current period provision	4,667	5,349	11,134	9,558
Charge-offs	(8,806)	(4,893)	(16,211)	(12,083)
Recoveries	1,525	1,665	2,970	3,062
Balance at the end of the period	53,107	57,332	53,107	57,332
Originated
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	51,711	49,123	51,751	50,572
Current period provision	3,904	4,966	7,286	8,893
Charge-offs	(8,190)	(4,314)	(12,663)	(10,909)
Recoveries	1,004	1,363	2,055	2,582
Balance at the end of the period	48,429	51,138	48,429	51,138
Originated | Personal Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	18,602	19,612	18,318	20,339
Current period provision	1,475	2,602	4,447	6,164
Charge-offs	(3,169)	(3,660)	(6,616)	(8,886)
Recoveries	757	1,056	1,516	1,993
Balance at the end of the period	17,665	19,610	17,665	19,610
Originated | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	4,005	3,724	4,054	3,824
Current period provision	185	157	372	187
Charge-offs	(390)	(310)	(739)	(506)
Recoveries	109	86	222	152
Balance at the end of the period	3,909	3,657	3,909	3,657
Originated | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	3,062	3,717	3,184	4,072
Current period provision	153	272	117	187
Charge-offs	(249)	(241)	(360)	(542)
Recoveries	24	91	49	122
Balance at the end of the period	2,990	3,839	2,990	3,839
Originated | Personal Banking | Consumer finance loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	405	3,031	676	3,968
Current period provision	(191)	(370)	(419)	(32)
Charge-offs	(58)	(486)	(237)	(2,039)
Recoveries	110	179	246	457
Balance at the end of the period	266	2,354	266	2,354
Originated | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	11,130	9,140	10,404	8,475
Current period provision	1,328	2,543	4,377	5,822
Charge-offs	(2,472)	(2,623)	(5,280)	(5,799)
Recoveries	514	700	999	1,262
Balance at the end of the period	10,500	9,760	10,500	9,760
Originated | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	33,109	29,511	33,433	30,233
Current period provision	2,429	2,364	2,839	2,729
Charge-offs	(5,021)	(654)	(6,047)	(2,023)
Recoveries	247	307	539	589
Balance at the end of the period	30,764	31,528	30,764	31,528
Originated | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	25,470	20,218	26,379	19,911
Current period provision	(508)	991	(972)	1,694
Charge-offs	(4,147)	(343)	(4,716)	(883)
Recoveries	147	153	271	297
Balance at the end of the period	20,962	21,019	20,962	21,019
Originated | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	7,639	9,293	7,054	10,322
Current period provision	2,937	1,373	3,811	1,035
Charge-offs	(874)	(311)	(1,331)	(1,140)
Recoveries	100	154	268	292
Balance at the end of the period	9,802	10,509	9,802	10,509
Acquired
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	4,010	6,088	3,463	6,223
Current period provision	763	383	3,848	665
Charge-offs	(616)	(579)	(3,548)	(1,174)
Recoveries	521	302	915	480
Balance at the end of the period	4,678	6,194	4,678	6,194
Acquired | Personal Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	945	1,624	850	1,783
Current period provision	16	269	104	375
Charge-offs	(183)	(303)	(267)	(691)
Recoveries	181	157	272	280
Balance at the end of the period	959	1,747	959	1,747
Acquired | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	92	89	83	131
Current period provision	0	74	8	32
Charge-offs	(7)	(79)	(15)	(84)
Recoveries	19	86	28	91
Balance at the end of the period	104	170	104	170
Acquired | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	399	728	348	762
Current period provision	(16)	56	28	258
Charge-offs	(140)	(165)	(182)	(475)
Recoveries	101	43	150	117
Balance at the end of the period	344	662	344	662
Acquired | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	454	807	419	890
Current period provision	32	139	68	85
Charge-offs	(36)	(59)	(70)	(132)
Recoveries	61	28	94	72
Balance at the end of the period	511	915	511	915
Acquired | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	3,065		2,613	4,440
Current period provision	747		3,744	290
Charge-offs	(433)		(3,281)	(483)
Recoveries	340		643	200
Balance at the end of the period	3,719	4,447	3,719	4,447
Acquired | Commercial Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		3,430
Current period provision		(27)
Charge-offs		(96)
Recoveries		115
Balance at the end of the period		3,422		3,422
Acquired | Commercial Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		1,034
Current period provision		141
Charge-offs		(180)
Recoveries		30
Balance at the end of the period		1,025		1,025
Acquired | Commercial Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		4,464
Current period provision		114
Charge-offs		(276)
Recoveries		145
Balance at the end of the period		4,447		4,447
Acquired | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	2,467		1,996	3,549
Current period provision	23		278	(157)
Charge-offs	(220)		(255)	(107)
Recoveries	301		552	137
Balance at the end of the period	2,571	3,422	2,571	3,422
Acquired | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	598		617	891
Current period provision	724		3,466	447
Charge-offs	(213)		(3,026)	(376)
Recoveries	39		91	63
Balance at the end of the period	$ 1,148	$ 1,025	$ 1,148	$ 1,025

Loans receivable - Loan Portfol

Loans receivable - Loan Portfolio by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 8,736,882		$ 8,051,439
Allowance for loan losses	53,107		55,214
Nonaccrual loans	67,697		72,281
Loans past due 90 days or more and still accruing	55		166
TDRs	31,269	$ 32,812	33,608	$ 30,662	$ 30,966	$ 32,104
Allowance related to TDRs	3,200		3,089
Additional commitments to customers with loans classified as TDRs	461		388
Nonaccrual TDRs	13,375		15,300	$ 10,860
Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	5,225,535		4,982,605
Allowance for loan losses	18,624		19,168
Nonaccrual loans	22,663		27,245
Loans past due 90 days or more and still accruing	55		166
TDRs	9,387		9,884
Allowance related to TDRs	1,235		2,513
Additional commitments to customers with loans classified as TDRs	32		4
Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	2,899,164		2,864,470
Allowance for loan losses	4,013		4,137
Nonaccrual loans	11,972		15,848
Loans past due 90 days or more and still accruing	0		0
TDRs	7,369		5,382
Allowance related to TDRs	776		993
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	1,314,947		1,258,422
Allowance for loan losses	3,334		3,532
Nonaccrual loans	7,201		7,075
Loans past due 90 days or more and still accruing	55		136
TDRs	2,018		4,502
Allowance related to TDRs	459		1,520
Additional commitments to customers with loans classified as TDRs	32		4
Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	1,449		3,817
Allowance for loan losses	266		676
Nonaccrual loans	10		22
Loans past due 90 days or more and still accruing	0		3
TDRs	0		0
Allowance related to TDRs	0		0
Additional commitments to customers with loans classified as TDRs	0		0
Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	1,009,975		855,896
Allowance for loan losses	11,011		10,823
Nonaccrual loans	3,480		4,300
Loans past due 90 days or more and still accruing	0		27
TDRs	0		0
Allowance related to TDRs	0		0
Additional commitments to customers with loans classified as TDRs	0		0
Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	3,511,347		3,068,834
Allowance for loan losses	34,483		36,046
Nonaccrual loans	45,034		45,036
Loans past due 90 days or more and still accruing	0		0
TDRs	21,882		23,724
Allowance related to TDRs	1,965		576
Additional commitments to customers with loans classified as TDRs	429		384
Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	2,808,153		2,471,821
Allowance for loan losses	23,533		28,375
Nonaccrual loans	35,623		36,935
Loans past due 90 days or more and still accruing	0		0
TDRs	18,256		19,859
Allowance related to TDRs	1,479		313
Additional commitments to customers with loans classified as TDRs	404		310
Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	703,194		597,013
Allowance for loan losses	10,950		7,671
Nonaccrual loans	9,411		8,101
Loans past due 90 days or more and still accruing	0		0
TDRs	3,626		3,865
Allowance related to TDRs	486		263
Additional commitments to customers with loans classified as TDRs	25		74
90 Days or greater delinquent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	43,153		50,730
90 Days or greater delinquent | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	19,110		22,211
90 Days or greater delinquent | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	10,617		12,965
90 Days or greater delinquent | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	5,591		5,996
90 Days or greater delinquent | Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	10		22
90 Days or greater delinquent | Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,892		3,228
90 Days or greater delinquent | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	24,043		28,519
90 Days or greater delinquent | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	21,123		25,509
90 Days or greater delinquent | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,920		3,010
Less than 90 days delinquent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	24,544		21,551
Less than 90 days delinquent | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	3,553		5,034
Less than 90 days delinquent | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	1,355		2,883
Less than 90 days delinquent | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	1,610		1,079
Less than 90 days delinquent | Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	0		0
Less than 90 days delinquent | Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	588		1,072
Less than 90 days delinquent | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	20,991		16,517
Less than 90 days delinquent | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	14,500		11,426
Less than 90 days delinquent | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 6,491		$ 5,091

Loans receivable - Compositio_2

Loans receivable - Composition of Impaired Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	$ 67,697	$ 72,281
Total impaired loans	85,971	98,283
Average recorded investment in impaired loans	89,378	84,338
Interest income recognized on impaired loans	2,155	3,762
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	22,663	27,245
Total impaired loans	30,885	35,723
Average recorded investment in impaired loans	31,929	33,824
Interest income recognized on impaired loans	910	1,656
Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	11,972	15,848
Total impaired loans	18,511	22,508
Average recorded investment in impaired loans	19,486	20,733
Interest income recognized on impaired loans	472	910
Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	7,201	7,075
Total impaired loans	8,884	8,893
Average recorded investment in impaired loans	8,738	9,075
Interest income recognized on impaired loans	286	511
Personal Banking | Consumer finance loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	10	22
Total impaired loans	10	22
Average recorded investment in impaired loans	0	24
Interest income recognized on impaired loans	0	0
Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,480	4,300
Total impaired loans	3,480	4,300
Average recorded investment in impaired loans	3,705	3,992
Interest income recognized on impaired loans	152	235
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	45,034	45,036
Total impaired loans	55,086	62,560
Average recorded investment in impaired loans	57,449	50,514
Interest income recognized on impaired loans	1,245	2,106
Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	35,623	36,935
Total impaired loans	43,173	49,919
Average recorded investment in impaired loans	47,684	41,328
Interest income recognized on impaired loans	1,004	1,599
Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	9,411	8,101
Total impaired loans	11,913	12,641
Average recorded investment in impaired loans	9,765	9,186
Interest income recognized on impaired loans	241	507
90 Days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	43,153	50,730
90 Days or greater delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	19,110	22,211
90 Days or greater delinquent | Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	10,617	12,965
90 Days or greater delinquent | Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	5,591	5,996
90 Days or greater delinquent | Personal Banking | Consumer finance loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	10	22
90 Days or greater delinquent | Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	2,892	3,228
90 Days or greater delinquent | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	24,043	28,519
90 Days or greater delinquent | Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	21,123	25,509
90 Days or greater delinquent | Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	2,920	3,010
Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	24,544	21,551
Loans less than 90 days delinquent reviewed for impairment	4,088	11,002
TDRs less than 90 days delinquent not included elsewhere	14,186	15,000
Less than 90 days delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,553	5,034
Loans less than 90 days delinquent reviewed for impairment	505	0
TDRs less than 90 days delinquent not included elsewhere	7,717	8,478
Less than 90 days delinquent | Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	1,355	2,883
Loans less than 90 days delinquent reviewed for impairment	505	0
TDRs less than 90 days delinquent not included elsewhere	6,034	6,660
Less than 90 days delinquent | Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	1,610	1,079
Loans less than 90 days delinquent reviewed for impairment	0	0
TDRs less than 90 days delinquent not included elsewhere	1,683	1,818
Less than 90 days delinquent | Personal Banking | Consumer finance loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	0	0
Loans less than 90 days delinquent reviewed for impairment	0	0
TDRs less than 90 days delinquent not included elsewhere	0	0
Less than 90 days delinquent | Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	588	1,072
Loans less than 90 days delinquent reviewed for impairment	0	0
TDRs less than 90 days delinquent not included elsewhere	0	0
Less than 90 days delinquent | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	20,991	16,517
Loans less than 90 days delinquent reviewed for impairment	3,583	11,002
TDRs less than 90 days delinquent not included elsewhere	6,469	6,522
Less than 90 days delinquent | Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	14,500	11,426
Loans less than 90 days delinquent reviewed for impairment	3,361	8,549
TDRs less than 90 days delinquent not included elsewhere	4,189	4,435
Less than 90 days delinquent | Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	6,491	5,091
Loans less than 90 days delinquent reviewed for impairment	222	2,453
TDRs less than 90 days delinquent not included elsewhere	$ 2,280	$ 2,087

Loans receivable - Evaluation o

Loans receivable - Evaluation of Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	$ 8,687,122	$ 7,997,835
Loans individually evaluated for impairment	49,760	53,604
Loans individually evaluated for impairment for which there is a related impairment reserve	45,439	48,875
Related impairment reserve	5,798	8,542
Loans individually evaluated for impairment for which there is no related reserve	4,321	4,729
Personal Banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	5,215,738	4,972,298
Loans individually evaluated for impairment	9,797	10,307
Loans individually evaluated for impairment for which there is a related impairment reserve	9,797	10,307
Related impairment reserve	1,241	1,276
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Residential mortgage loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	2,891,404	2,856,359
Loans individually evaluated for impairment	7,760	8,111
Loans individually evaluated for impairment for which there is a related impairment reserve	7,760	8,111
Related impairment reserve	777	747
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Home equity loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	1,312,929	1,256,255
Loans individually evaluated for impairment	2,018	2,167
Loans individually evaluated for impairment for which there is a related impairment reserve	2,018	2,167
Related impairment reserve	459	523
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Consumer finance loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	1,449	3,817
Loans individually evaluated for impairment	0	0
Loans individually evaluated for impairment for which there is a related impairment reserve	0	0
Related impairment reserve	0	0
Loans individually evaluated for impairment for which there is no related reserve	0	0
Personal Banking | Consumer loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	1,009,956	855,867
Loans individually evaluated for impairment	19	29
Loans individually evaluated for impairment for which there is a related impairment reserve	19	29
Related impairment reserve	5	6
Loans individually evaluated for impairment for which there is no related reserve	0	0
Commercial Banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	3,471,384	3,025,537
Loans individually evaluated for impairment	39,963	43,297
Loans individually evaluated for impairment for which there is a related impairment reserve	35,642	38,568
Related impairment reserve	4,557	7,266
Loans individually evaluated for impairment for which there is no related reserve	4,321	4,729
Commercial Banking | Commercial real estate loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	2,778,298	2,436,605
Loans individually evaluated for impairment	29,855	35,216
Loans individually evaluated for impairment for which there is a related impairment reserve	26,741	31,830
Related impairment reserve	2,921	6,499
Loans individually evaluated for impairment for which there is no related reserve	3,114	3,386
Commercial Banking | Commercial loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	693,086	588,932
Loans individually evaluated for impairment	10,108	8,081
Loans individually evaluated for impairment for which there is a related impairment reserve	8,901	6,738
Related impairment reserve	1,636	767
Loans individually evaluated for impairment for which there is no related reserve	$ 1,207	$ 1,343

Loans receivable - Roll Forward

Loans receivable - Roll Forward of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract	Dec. 31, 2018USD ($)
Number of contracts
Beginning balance | contract	195	200	195	205
Number of contracts new TDRs | contract	2	10	2	19
Number of re-modified TDRs | contract	0	0	0	0
Ending balance | contract	183	205	183	205
Amount
Beginning TDR balance	$ 32,812	$ 30,966	$ 33,608	$ 32,104
New TDRs	306	861	306	5,796
Re-modified TDRs	0	0	0	0
Net paydowns	0	(875)	(786)	(1,822)
Ending TDR balance	31,269	30,662	31,269	30,662
Accruing TDRs	17,894	19,802	17,894	19,802
Non-accrual TDRs	$ 13,375	$ 10,860	$ 13,375	$ 10,860	$ 15,300
Residential mortgage loans
Number of contracts
Number of contracts charged off | contract	0	0	0	1
Number of contracts paid off | contract	4	1	4	2
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ (135)
Amount of contracts paid off	$ (180)	$ (6)	$ (180)	$ (255)
Home equity loans
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	4	1	4	2
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ (75)	$ (35)	$ (75)	$ (47)
Commercial real estate loans
Number of contracts
Number of contracts charged off | contract	0	0	0	1
Number of contracts paid off | contract	6	3	6	7
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ (203)
Amount of contracts paid off	$ (1,594)	$ (249)	$ (1,604)	$ (1,823)
Commercial loans
Number of contracts
Number of contracts charged off | contract	0	0	0	1
Number of contracts paid off | contract	0	0	0	5
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ (721)
Amount of contracts paid off	$ 0	$ 0	$ 0	$ (2,232)

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		6 Months Ended
	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	2	10	2	19
Recorded investment at the time of modification	$ 310	$ 861	$ 310	$ 5,796
Current recorded investment	306	819	306	4,907
Current allowance	$ 33	$ 86	$ 33	$ 144
Number of TDR contracts with subsequent default | contract	0	0		0
Personal Banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	7	0	12
Recorded investment at the time of modification	$ 0	$ 237	$ 0	$ 590
Current recorded investment	0	196	0	547
Current allowance	$ 0	$ 43	$ 0	$ 101
Personal Banking | Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	2	0	4
Recorded investment at the time of modification	$ 0	$ 60	$ 0	$ 273
Current recorded investment	0	59	0	272
Current allowance	$ 0	$ 6	$ 0	$ 27
Personal Banking | Home equity loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	5	0	8
Recorded investment at the time of modification	$ 0	$ 177	$ 0	$ 317
Current recorded investment	0	137	0	275
Current allowance	$ 0	$ 37	$ 0	$ 74
Personal Banking | Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0		0	0
Recorded investment at the time of modification	$ 0		$ 0
Current recorded investment	0		0	$ 0
Current allowance	$ 0		$ 0
Commercial Banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	2	3	2	7
Recorded investment at the time of modification	$ 310	$ 624	$ 310	$ 5,206
Current recorded investment	306	623	306	4,360
Current allowance	$ 33	$ 43	$ 33	$ 43
Commercial Banking | Commercial real estate loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	1	1	2
Recorded investment at the time of modification	$ 300	$ 481	$ 300	$ 2,883
Current recorded investment	297	481	297	2,852
Current allowance	$ 32	$ 33	$ 32	$ 33
Commercial Banking | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	2	1	5
Recorded investment at the time of modification	$ 10	$ 143	$ 10	$ 2,323
Current recorded investment	9	142	9	1,508
Current allowance	$ 1	$ 10	$ 1	$ 10

Loans receivable - Troubled D_2

Loans receivable - Troubled Debt Restructurings by Type of Modification (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2019USD ($)contract	Jun. 30, 2018USD ($)contract
Troubled debt restructurings
Number of contracts | contract	2	10	2	19
Troubled debt restructurings	$ 306	$ 819	$ 306	$ 4,907
Number of re-modified TDRs | contract	0	0	0	0
Rate
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 7	$ 0	$ 36
Payment
Troubled debt restructurings
Troubled debt restructurings	297	481	297	481
Maturity date
Troubled debt restructurings
Troubled debt restructurings	9	193	9	371
Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 138	$ 0	$ 4,019
Personal Banking
Troubled debt restructurings
Number of contracts | contract	0	7	0	12
Troubled debt restructurings	$ 0	$ 196	$ 0	$ 547
Personal Banking | Rate
Troubled debt restructurings
Troubled debt restructurings	0	7	0	36
Personal Banking | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal Banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	51	0	229
Personal Banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 138	$ 0	$ 282
Personal Banking | Residential mortgage loans
Troubled debt restructurings
Number of contracts | contract	0	2	0	4
Troubled debt restructurings	$ 0	$ 59	$ 0	$ 272
Personal Banking | Residential mortgage loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	7	0	7
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	0	0	0	178
Personal Banking | Residential mortgage loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 52	$ 0	$ 87
Personal Banking | Home equity loans
Troubled debt restructurings
Number of contracts | contract	0	5	0	8
Troubled debt restructurings	$ 0	$ 137	$ 0	$ 275
Personal Banking | Home equity loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	29
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	51	0	51
Personal Banking | Home equity loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 86	$ 0	$ 195
Personal Banking | Consumer loans
Troubled debt restructurings
Number of contracts | contract	0		0	0
Troubled debt restructurings	$ 0		$ 0	$ 0
Personal Banking | Consumer loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0		0	0
Personal Banking | Consumer loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0		0	0
Personal Banking | Consumer loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0		0	0
Personal Banking | Consumer loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0		$ 0	$ 0
Commercial Banking
Troubled debt restructurings
Number of contracts | contract	2	3	2	7
Troubled debt restructurings	$ 306	$ 623	$ 306	$ 4,360
Commercial Banking | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial Banking | Payment
Troubled debt restructurings
Troubled debt restructurings	297	481	297	481
Commercial Banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	9	142	9	142
Commercial Banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 3,737
Commercial Banking | Commercial real estate loans
Troubled debt restructurings
Number of contracts | contract	1	1	1	2
Troubled debt restructurings	$ 297	$ 481	$ 297	$ 2,852
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	297	481	297	481
Commercial Banking | Commercial real estate loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial Banking | Commercial real estate loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 2,371
Commercial Banking | Commercial loans
Troubled debt restructurings
Number of contracts | contract	1	2	1	5
Troubled debt restructurings	$ 9	$ 142	$ 9	$ 1,508
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	0	0	0	0
Commercial Banking | Commercial loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	9	142	9	142
Commercial Banking | Commercial loans | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 0	$ 1,366

Loans receivable - Loan Delinqu

Loans receivable - Loan Delinquencies (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Loan payment delinquencies
Total delinquency	$ 76,080	$ 121,534
Current	8,660,802	7,929,905
Total loans	8,736,882	8,051,439
90 days or greater delinquent and accruing	189	143
30-59 Days delinquent
Loan payment delinquencies
Total delinquency	16,916	53,010
60-89 Days delinquent
Loan payment delinquencies
Total delinquency	15,822	17,651
90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	43,342	50,873
Personal Banking
Loan payment delinquencies
Total loans	5,225,535	4,982,605
Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total loans	2,899,164	2,864,470
Personal Banking | Home equity loans
Loan payment delinquencies
Total loans	1,314,947	1,258,422
Personal Banking | Consumer finance loans
Loan payment delinquencies
Total loans	1,449	3,817
Personal Banking | Consumer loans
Loan payment delinquencies
Total loans	1,009,975	855,896
Commercial Banking
Loan payment delinquencies
Total loans	3,511,347	3,068,834
Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total loans	2,808,153	2,471,821
Commercial Banking | Commercial loans
Loan payment delinquencies
Total loans	703,194	597,013
Originated
Loan payment delinquencies
Total delinquency	63,827	109,605
Current	7,726,167	7,303,580
Total loans	7,789,994	7,413,185
90 days or greater delinquent and accruing	0	0
Originated | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	15,139	49,716
Originated | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	14,762	15,903
Originated | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	33,926	43,986
Originated | Personal Banking
Loan payment delinquencies
Total delinquency	39,170	73,809
Current	4,774,522	4,541,001
Total loans	4,813,692	4,614,810
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	16,594	44,645
Current	2,790,198	2,714,474
Total loans	2,806,792	2,759,119
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency	9,732	13,406
Current	1,031,570	1,030,472
Total loans	1,041,302	1,043,878
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Consumer finance loans
Loan payment delinquencies
Total delinquency	184	854
Current	1,265	2,963
Total loans	1,449	3,817
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency	12,660	14,904
Current	951,489	793,092
Total loans	964,149	807,996
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	12,294	43,716
Originated | Personal Banking | 30-59 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	1,562	27,245
Originated | Personal Banking | 30-59 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	3,327	6,810
Originated | Personal Banking | 30-59 Days delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	130	661
Originated | Personal Banking | 30-59 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	7,275	9,000
Originated | Personal Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	10,494	10,542
Originated | Personal Banking | 60-89 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	5,806	5,732
Originated | Personal Banking | 60-89 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	1,942	1,771
Originated | Personal Banking | 60-89 Days delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	44	172
Originated | Personal Banking | 60-89 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	2,702	2,867
Originated | Personal Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	16,382	19,551
Originated | Personal Banking | 90 Days or greater delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	9,226	11,668
Originated | Personal Banking | 90 Days or greater delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	4,463	4,825
Originated | Personal Banking | 90 Days or greater delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	10	21
Originated | Personal Banking | 90 Days or greater delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	2,683	3,037
Originated | Commercial Banking
Loan payment delinquencies
Total delinquency	24,657	35,796
Current	2,951,645	2,762,579
Total loans	2,976,302	2,798,375
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	20,093	31,913
Current	2,316,323	2,217,105
Total loans	2,336,416	2,249,018
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency	4,564	3,883
Current	635,322	545,474
Total loans	639,886	549,357
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	2,845	6,000
Originated | Commercial Banking | 30-59 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	2,286	5,391
Originated | Commercial Banking | 30-59 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	559	609
Originated | Commercial Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	4,268	5,361
Originated | Commercial Banking | 60-89 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	2,551	4,801
Originated | Commercial Banking | 60-89 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	1,717	560
Originated | Commercial Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	17,544	24,435
Originated | Commercial Banking | 90 Days or greater delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	15,256	21,721
Originated | Commercial Banking | 90 Days or greater delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	2,288	2,714
Acquired
Loan payment delinquencies
Total delinquency	12,253	11,929
Current	934,635	626,325
Total loans	946,888	638,254
90 days or greater delinquent and accruing	189	143
Acquired | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	1,777	3,294
Acquired | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	1,060	1,748
Acquired | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	9,416	6,887
Acquired | Personal Banking
Loan payment delinquencies
Total delinquency	5,441	6,705
Current	406,402	361,090
Total loans	411,843	367,795
90 days or greater delinquent and accruing	189	65
Acquired | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	2,099	2,542
Current	90,273	91,240
Total loans	92,372	93,782
90 days or greater delinquent and accruing	183	19
Acquired | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency	2,751	3,345
Current	270,894	211,199
Total loans	273,645	214,544
90 days or greater delinquent and accruing	0	40
Acquired | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency	591	818
Current	45,235	58,651
Total loans	45,826	59,469
90 days or greater delinquent and accruing	6	6
Acquired | Personal Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	1,538	2,818
Acquired | Personal Banking | 30-59 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	67	532
Acquired | Personal Banking | 30-59 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	1,246	1,839
Acquired | Personal Banking | 30-59 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	225	447
Acquired | Personal Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	986	1,162
Acquired | Personal Banking | 60-89 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	458	693
Acquired | Personal Banking | 60-89 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	377	294
Acquired | Personal Banking | 60-89 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	151	175
Acquired | Personal Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	2,917	2,725
Acquired | Personal Banking | 90 Days or greater delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	1,574	1,317
Acquired | Personal Banking | 90 Days or greater delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	1,128	1,212
Acquired | Personal Banking | 90 Days or greater delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	215	196
Acquired | Commercial Banking
Loan payment delinquencies
Total delinquency	6,812	5,224
Current	528,233	265,235
Total loans	535,045	270,459
90 days or greater delinquent and accruing	0	78
Acquired | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	6,065	4,564
Current	465,672	218,239
Total loans	471,737	222,803
90 days or greater delinquent and accruing	0	78
Acquired | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency	747	660
Current	62,561	46,996
Total loans	63,308	47,656
90 days or greater delinquent and accruing	0	0
Acquired | Commercial Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	239	476
Acquired | Commercial Banking | 30-59 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	132	112
Acquired | Commercial Banking | 30-59 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	107	364
Acquired | Commercial Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	74	586
Acquired | Commercial Banking | 60-89 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	66	586
Acquired | Commercial Banking | 60-89 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	8	0
Acquired | Commercial Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	6,499	4,162
Acquired | Commercial Banking | 90 Days or greater delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	5,867	3,866
Acquired | Commercial Banking | 90 Days or greater delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	$ 632	$ 296

Loans receivable - Credit Quali

Loans receivable - Credit Quality Indicators (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Credit quality indicators
Total loans	$ 8,736,882,000	$ 8,051,439,000
Pass
Credit quality indicators
Total loans	8,414,074,000	7,753,667,000
Special mention
Credit quality indicators
Total loans	124,616,000	113,969,000
Substandard
Credit quality indicators
Total loans	197,029,000	183,803,000
Doubtful
Credit quality indicators
Total loans	1,163,000	0
Loss
Credit quality indicators
Total loans	0	0
Personal Banking
Credit quality indicators
Total loans	5,225,535,000	4,982,605,000
Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans	2,899,164,000	2,864,470,000
Personal Banking | Home equity loans
Credit quality indicators
Total loans	1,314,947,000	1,258,422,000
Personal Banking | Consumer finance loans
Credit quality indicators
Total loans	1,449,000	3,817,000
Personal Banking | Consumer loans
Credit quality indicators
Total loans	1,009,975,000	855,896,000
Commercial Banking
Credit quality indicators
Total loans	3,511,347,000	3,068,834,000
Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans	2,808,153,000	2,471,821,000
Commercial Banking | Commercial loans
Credit quality indicators
Total loans	703,194,000	597,013,000
Originated
Credit quality indicators
Total loans	7,789,994,000	7,413,185,000
Originated | Pass
Credit quality indicators
Total loans	7,517,364,000	7,161,796,000
Originated | Special mention
Credit quality indicators
Total loans	116,521,000	106,902,000
Originated | Substandard
Credit quality indicators
Total loans	154,946,000	144,487,000
Originated | Doubtful
Credit quality indicators
Total loans	1,163,000	0
Originated | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking
Credit quality indicators
Total loans	4,813,692,000	4,614,810,000
Originated | Personal Banking | Pass
Credit quality indicators
Total loans	4,797,770,000	4,595,403,000
Originated | Personal Banking | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Substandard
Credit quality indicators
Total loans	15,922,000	19,407,000
Originated | Personal Banking | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans	2,806,792,000	2,759,119,000
Originated | Personal Banking | Residential mortgage loans | Pass
Credit quality indicators
Total loans	2,799,431,000	2,749,266,000
Originated | Personal Banking | Residential mortgage loans | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Residential mortgage loans | Substandard
Credit quality indicators
Total loans	7,361,000	9,853,000
Originated | Personal Banking | Residential mortgage loans | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Residential mortgage loans | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Home equity loans
Credit quality indicators
Total loans	1,041,302,000	1,043,878,000
Originated | Personal Banking | Home equity loans | Pass
Credit quality indicators
Total loans	1,035,922,000	1,038,245,000
Originated | Personal Banking | Home equity loans | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Home equity loans | Substandard
Credit quality indicators
Total loans	5,380,000	5,633,000
Originated | Personal Banking | Home equity loans | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Home equity loans | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer finance loans
Credit quality indicators
Total loans	1,449,000	3,817,000
Originated | Personal Banking | Consumer finance loans | Pass
Credit quality indicators
Total loans	1,449,000	3,817,000
Originated | Personal Banking | Consumer finance loans | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer finance loans | Substandard
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer finance loans | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer finance loans | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer loans
Credit quality indicators
Total loans	964,149,000	807,996,000
Originated | Personal Banking | Consumer loans | Pass
Credit quality indicators
Total loans	960,968,000	804,075,000
Originated | Personal Banking | Consumer loans | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer loans | Substandard
Credit quality indicators
Total loans	3,181,000	3,921,000
Originated | Personal Banking | Consumer loans | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Consumer loans | Loss
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking
Credit quality indicators
Total loans	2,976,302,000	2,798,375,000
Originated | Commercial Banking | Pass
Credit quality indicators
Total loans	2,719,594,000	2,566,393,000
Originated | Commercial Banking | Special mention
Credit quality indicators
Total loans	116,521,000	106,902,000
Originated | Commercial Banking | Substandard
Credit quality indicators
Total loans	139,024,000	125,080,000
Originated | Commercial Banking | Doubtful
Credit quality indicators
Total loans	1,163,000	0
Originated | Commercial Banking | Loss
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans	2,336,416,000	2,249,018,000
Originated | Commercial Banking | Commercial real estate loans | Pass
Credit quality indicators
Total loans	2,152,525,000	2,062,728,000
Originated | Commercial Banking | Commercial real estate loans | Special mention
Credit quality indicators
Total loans	80,607,000	91,142,000
Originated | Commercial Banking | Commercial real estate loans | Substandard
Credit quality indicators
Total loans	103,103,000	95,148,000
Originated | Commercial Banking | Commercial real estate loans | Doubtful
Credit quality indicators
Total loans	181,000	0
Originated | Commercial Banking | Commercial real estate loans | Loss
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking | Commercial loans
Credit quality indicators
Total loans	639,886,000	549,357,000
Originated | Commercial Banking | Commercial loans | Pass
Credit quality indicators
Total loans	567,069,000	503,665,000
Originated | Commercial Banking | Commercial loans | Special mention
Credit quality indicators
Total loans	35,914,000	15,760,000
Originated | Commercial Banking | Commercial loans | Substandard
Credit quality indicators
Total loans	35,921,000	29,932,000
Originated | Commercial Banking | Commercial loans | Doubtful
Credit quality indicators
Total loans	982,000	0
Originated | Commercial Banking | Commercial loans | Loss
Credit quality indicators
Total loans	0	0
Acquired
Credit quality indicators
Total loans	946,888,000	638,254,000
Acquired | Pass
Credit quality indicators
Total loans	896,710,000	591,871,000
Acquired | Special mention
Credit quality indicators
Total loans	8,095,000	7,067,000
Acquired | Substandard
Credit quality indicators
Total loans	42,083,000	39,316,000
Acquired | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Loss
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking
Credit quality indicators
Total loans	411,843,000	367,795,000
Acquired | Personal Banking | Pass
Credit quality indicators
Total loans	408,402,000	364,852,000
Acquired | Personal Banking | Special mention
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Substandard
Credit quality indicators
Total loans	3,441,000	2,943,000
Acquired | Personal Banking | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Loss
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans	92,372,000	93,782,000
Acquired | Personal Banking | Residential mortgage loans | Pass
Credit quality indicators
Total loans	91,041,000	92,625,000
Acquired | Personal Banking | Residential mortgage loans | Special mention
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Residential mortgage loans | Substandard
Credit quality indicators
Total loans	1,331,000	1,157,000
Acquired | Personal Banking | Residential mortgage loans | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Residential mortgage loans | Loss
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Home equity loans
Credit quality indicators
Total loans	273,645,000	214,544,000
Acquired | Personal Banking | Home equity loans | Pass
Credit quality indicators
Total loans	271,965,000	213,273,000
Acquired | Personal Banking | Home equity loans | Special mention
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Home equity loans | Substandard
Credit quality indicators
Total loans	1,680,000	1,271,000
Acquired | Personal Banking | Home equity loans | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Home equity loans | Loss
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Consumer loans
Credit quality indicators
Total loans	45,826,000	59,469,000
Acquired | Personal Banking | Consumer loans | Pass
Credit quality indicators
Total loans	45,396,000	58,954,000
Acquired | Personal Banking | Consumer loans | Special mention
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Consumer loans | Substandard
Credit quality indicators
Total loans	430,000	515,000
Acquired | Personal Banking | Consumer loans | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Consumer loans | Loss
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking
Credit quality indicators
Total loans	535,045,000	270,459,000
Acquired | Commercial Banking | Pass
Credit quality indicators
Total loans	488,308,000	227,019,000
Acquired | Commercial Banking | Special mention
Credit quality indicators
Total loans	8,095,000	7,067,000
Acquired | Commercial Banking | Substandard
Credit quality indicators
Total loans	38,642,000	36,373,000
Acquired | Commercial Banking | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking | Loss
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans	471,737,000	222,803,000
Acquired | Commercial Banking | Commercial real estate loans | Pass
Credit quality indicators
Total loans	433,487,000	191,622,000
Acquired | Commercial Banking | Commercial real estate loans | Special mention
Credit quality indicators
Total loans	5,828,000	3,546,000
Acquired | Commercial Banking | Commercial real estate loans | Substandard
Credit quality indicators
Total loans	32,422,000	27,635,000
Acquired | Commercial Banking | Commercial real estate loans | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking | Commercial real estate loans | Loss
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking | Commercial loans
Credit quality indicators
Total loans	63,308,000	47,656,000
Acquired | Commercial Banking | Commercial loans | Pass
Credit quality indicators
Total loans	54,821,000	35,397,000
Acquired | Commercial Banking | Commercial loans | Special mention
Credit quality indicators
Total loans	2,267,000	3,521,000
Acquired | Commercial Banking | Commercial loans | Substandard
Credit quality indicators
Total loans	6,220,000	8,738,000
Acquired | Commercial Banking | Commercial loans | Doubtful
Credit quality indicators
Total loans	0	0
Acquired | Commercial Banking | Commercial loans | Loss
Credit quality indicators
Total loans	0	$ 0
Minimum | Special mention or substandard
Credit quality indicators
Total loans	$ 1,000,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Amortizable intangible assets:
Intangible asset - net	$ 24,112		$ 24,112		$ 19,821
Amortization expense	1,760	$ 1,520	3,207	$ 3,040
Estimated amortization expense
For the year ending December 31, 2019	6,718		6,718
For the year ending December 31, 2020	5,535		5,535
For the year ending December 31, 2021	4,438		4,438
For the year ending December 31, 2022	3,438		3,438
For the year ending December 31, 2023	2,561		2,561
For the year ending December 31, 2024	1,876		1,876
Core Deposits
Amortizable intangible assets:
Intangible asset - gross	63,685		63,685		63,685
Acquisitions			7,498		0
Less: accumulated amortization	(47,934)		(47,934)		(45,027)
Intangible asset - net	23,249		23,249		18,658
Customer and Contract
Amortizable intangible assets:
Intangible asset - gross	10,474		10,474		10,474
Less: accumulated amortization	(9,611)		(9,611)		(9,311)
Intangible asset - net	$ 863		$ 863		$ 1,163

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 307,420	$ 307,420
Goodwill from acquisition	37,300	0
Balance at the end of the period	$ 344,720	$ 307,420

Borrowed Funds (Details)

Borrowed Funds (Details)	Dec. 15, 2005USD ($)$ / sharesshares	Dec. 05, 2005USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Mar. 08, 2019trust	Mar. 07, 2019trust	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Number of statutory business trusts owned | trust					3
Junior subordinated debentures			$ 121,757,000			$ 111,213,000
Number of additional business trusts owned | trust				2
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
Trust preferred investments | Northwest Bancorp Capital Trust III
Debt Instrument [Line Items]
Cumulative trust preferred securities issued (in shares) | shares		50,000
Cumulative trust preferred securities issued, liquidation value per preferred security (in dollars per security) | $ / shares		$ 1,000
Total value of cumulative trust preferred securities issued		$ 50,000,000
Junior subordinated debentures			$ 51,547,000
Trust preferred investments | Northwest Bancorp Capital Trust III | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)		1.38%	1.38%
Effective rate (as a percent)			3.69%
Trust preferred investments | Northwest Bancorp Statutory Trust IV
Debt Instrument [Line Items]
Cumulative trust preferred securities issued (in shares) | shares	50,000
Cumulative trust preferred securities issued, liquidation value per preferred security (in dollars per security) | $ / shares	$ 1,000
Total value of cumulative trust preferred securities issued	$ 50,000,000
Junior subordinated debentures			$ 51,547,000
Trust preferred investments | Northwest Bancorp Statutory Trust IV | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.38%		1.38%
Effective rate (as a percent)			3.79%
Trust preferred investments | Union National Capital Trust I
Debt Instrument [Line Items]
Cumulative trust preferred securities issued (in shares) | shares			8,000
Cumulative trust preferred securities issued, liquidation value per preferred security (in dollars per security) | $ / shares			$ 1,000
Total value of cumulative trust preferred securities issued			$ 8,000,000
Trust preferred investments | Union National Capital Trust I | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)			2.85%
Trust preferred investments | Union National Capital Trust II
Debt Instrument [Line Items]
Cumulative trust preferred securities issued (in shares) | shares			3,000
Cumulative trust preferred securities issued, liquidation value per preferred security (in dollars per security) | $ / shares			$ 1,000
Total value of cumulative trust preferred securities issued			$ 3,000,000
Trust preferred investments | Union National Capital Trust II | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)			2.00%
Interest rate swaps | LNB Trust II
Debt Instrument [Line Items]
Cumulative trust preferred securities issued (in shares) | shares			7,875
Cumulative trust preferred securities issued, liquidation value per preferred security (in dollars per security) | $ / shares			$ 1,000
Total value of cumulative trust preferred securities issued			$ 7,875,000
Junior subordinated debentures			$ 8,119,000
Interest rate swaps | LNB Trust II | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)			1.48%
Effective rate (as a percent)			3.89%
Interest rate swaps | Union National Capital Trust I
Debt Instrument [Line Items]
Junior subordinated debentures			$ 8,248,000
Interest rate swaps | Union National Capital Trust II
Debt Instrument [Line Items]
Junior subordinated debentures			3,093,000
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			250,000,000
Revolving line of credit			87,300,000			128,600,000
Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Securities sold under agreements to repurchase			$ 84,400,000			$ 105,800,000

Guarantees (Details)

Guarantees (Details) - Letter of Credit $ in Thousands	Jun. 30, 2019USD ($)
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 40,900
Maximum exposure collateralized	34,000
Liability recognized for the obligations	$ 322

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock options
Antidilutive securities excluded from the calculation of earnings per share
Average share price during the reporting period (in dollars per share)	$ 17.16	$ 17.07	$ 17.45	$ 16.95

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Reported net income	$ 26,383	$ 26,299	$ 51,427	$ 51,284
Weighted average common shares outstanding (in shares)	105,233,635	101,870,043	104,173,601	101,735,235
Dilutive potential shares due to effect of stock options (in shares)	1,024,580	1,554,111	1,208,669	1,545,885
Total weighted average common shares and dilutive potential shares (in shares)	106,258,215	103,424,154	105,382,270	103,281,120
Basic earnings per share (in dollars per share)	$ 0.25	$ 0.26	$ 0.49	$ 0.50
Diluted earnings per share (in dollars per share)	$ 0.25	$ 0.25	$ 0.49	$ 0.50

Pension and Other Post-retire_3

Pension and Other Post-retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension benefits
Components of net periodic benefit cost
Service cost	$ 1,274	$ 1,716	$ 2,549	$ 3,432
Interest cost	1,851	1,678	3,703	3,356
Expected return on plan assets	(2,759)	(2,992)	(5,519)	(5,984)
Amortization of prior service cost	(580)	(580)	(1,161)	(1,161)
Amortization of the net loss	873	872	1,746	1,745
Net periodic cost	659	694	1,318	1,388
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	13	13	26	27
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of the net loss	17	25	34	49
Net periodic cost	$ 30	$ 38	$ 60	$ 76

Disclosures About Fair Value _3

Disclosures About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Significant unrealized appreciation or depreciation in financial instruments	$ 0	$ 0
Financial assets:
Securities available-for-sale	854,765,000	801,450,000
Securities held-to-maturity	20,676,000	22,446,000
Accrued interest receivable	28,742,000	24,490,000
Interest rate swaps	18,507,000	6,445,000
Financial liabilities:
Borrowed funds	171,677,000	234,389,000
Junior subordinated debentures	121,757,000	111,213,000
Interest rate swaps	18,559,000	6,445,000
Level 1
Financial assets:
Cash and cash equivalents	106,988,000	68,789,000
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans receivable, net	0	0
Accrued interest receivable	28,742,000	24,490,000
Interest rate swaps		0
FHLB stock	0	0
Total financial assets	135,730,000	93,279,000
Financial liabilities:
Savings and checking deposits	7,083,521,000	6,489,338,000
Time deposits	0	0
Borrowed funds	171,677,000	234,389,000
Junior subordinated debentures	0	0
Accrued interest payable	1,207,000	744,000
Total financial liabilities	7,256,405,000	6,724,471,000
Level 2
Financial assets:
Cash and cash equivalents	0	0
Securities available-for-sale	854,765,000	801,450,000
Securities held-to-maturity	20,676,000	22,446,000
Loans receivable, net	0	0
Accrued interest receivable	0	0
Interest rate swaps		6,445,000
FHLB stock	0	0
Total financial assets	893,861,000	830,341,000
Financial liabilities:
Savings and checking deposits	0	0
Time deposits	0	0
Borrowed funds	0	0
Junior subordinated debentures	0	0
Accrued interest payable	0	0
Total financial liabilities	18,472,000	6,445,000
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	8,627,759,000	7,845,313,000
Accrued interest receivable	0	0
Interest rate swaps		0
FHLB stock	0	0
Total financial assets	8,627,759,000	7,845,313,000
Financial liabilities:
Savings and checking deposits	0	0
Time deposits	1,599,989,000	1,434,410,000
Borrowed funds	0	0
Junior subordinated debentures	115,124,000	102,572,000
Accrued interest payable	0	0
Total financial liabilities	1,715,113,000	1,536,982,000
Carrying amount
Financial assets:
Cash and cash equivalents	106,988,000	68,789,000
Securities available-for-sale	854,765,000	801,450,000
Securities held-to-maturity	20,414,000	22,765,000
Loans receivable, net	8,683,775,000	7,996,225,000
Accrued interest receivable	28,742,000	24,490,000
Interest rate swaps		6,445,000
FHLB stock	14,966,000	15,635,000
Total financial assets	9,728,070,000	8,935,799,000
Financial liabilities:
Savings and checking deposits	7,083,521,000	6,489,338,000
Time deposits	1,600,372,000	1,404,841,000
Borrowed funds	171,677,000	234,389,000
Junior subordinated debentures	121,757,000	111,213,000
Accrued interest payable	1,207,000	744,000
Total financial liabilities	8,997,006,000	8,246,970,000
Estimated fair value
Financial assets:
Cash and cash equivalents	106,988,000	68,789,000
Securities available-for-sale	854,765,000	801,450,000
Securities held-to-maturity	20,676,000	22,446,000
Loans receivable, net	8,627,759,000	7,845,313,000
Accrued interest receivable	28,742,000	24,490,000
Interest rate swaps		6,445,000
FHLB stock	14,966,000	15,635,000
Total financial assets	9,672,316,000	8,784,568,000
Financial liabilities:
Savings and checking deposits	7,083,521,000	6,489,338,000
Time deposits	1,599,989,000	1,434,410,000
Borrowed funds	171,677,000	234,389,000
Junior subordinated debentures	115,124,000	102,572,000
Accrued interest payable	1,207,000	744,000
Total financial liabilities	8,989,990,000	8,267,898,000
Interest rate swaps | Level 1
Financial assets:
Interest rate swaps	0
Financial liabilities:
Interest rate swaps	0	0
Interest rate swaps | Level 2
Financial assets:
Interest rate swaps	18,420,000
Financial liabilities:
Interest rate swaps	18,472,000	6,445,000
Interest rate swaps | Level 3
Financial assets:
Interest rate swaps	0
Financial liabilities:
Interest rate swaps	0	0
Interest rate swaps | Carrying amount
Financial assets:
Interest rate swaps	18,420,000
Financial liabilities:
Interest rate swaps	18,472,000	6,445,000
Interest rate swaps | Estimated fair value
Financial assets:
Interest rate swaps	18,420,000
Financial liabilities:
Interest rate swaps	$ 18,472,000	$ 6,445,000

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	Jun. 30, 2019	Dec. 31, 2018
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	$ 854,765	$ 801,450
Interest rate swaps	18,507	6,445
Interest rate swaps	18,559	6,445
Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Interest rate swaps		0
Total financial assets	135,730	93,279
Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	854,765	801,450
Interest rate swaps		6,445
Total financial assets	893,861	830,341
Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Interest rate swaps		0
Total financial assets	8,627,759	7,845,313
Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Total financial assets	873,185	807,895
Total liabilities	18,472	6,445
Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
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
Total financial assets	873,185	807,895
Total liabilities	18,472	6,445
Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Total financial assets	0	0
Total liabilities	0	0
Debt securities | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	222,433	224,192
Debt securities | Measured on recurring basis | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	14,927	14,780
Debt securities | Measured on recurring basis | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	174,780	187,335
Debt securities | Measured on recurring basis | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	31,809	21,163
Debt securities | Measured on recurring basis | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	917	914
Debt securities | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 1 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 1 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 1 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 1 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	222,433	224,192
Debt securities | Measured on recurring basis | Level 2 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	14,927	14,780
Debt securities | Measured on recurring basis | Level 2 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	174,780	187,335
Debt securities | Measured on recurring basis | Level 2 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	31,809	21,163
Debt securities | Measured on recurring basis | Level 2 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	917	914
Debt securities | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 3 | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 3 | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 3 | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Debt securities | Measured on recurring basis | Level 3 | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Total mortgage-backed securities | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	632,332	577,258
Total mortgage-backed securities | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Total mortgage-backed securities | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	632,332	577,258
Total mortgage-backed securities | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	632,332	577,258
Residential mortgage-backed securities | Measured on recurring basis | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	26,009	27,041
Residential mortgage-backed securities | Measured on recurring basis | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	87,434	73,196
Residential mortgage-backed securities | Measured on recurring basis | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	56,583	51,621
Residential mortgage-backed securities | Measured on recurring basis | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	11	528
Residential mortgage-backed securities | Measured on recurring basis | Level 1 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 1 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 1 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 1 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 2 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	26,009	27,041
Residential mortgage-backed securities | Measured on recurring basis | Level 2 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	87,434	73,196
Residential mortgage-backed securities | Measured on recurring basis | Level 2 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	56,583	51,621
Residential mortgage-backed securities | Measured on recurring basis | Level 2 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	11	528
Residential mortgage-backed securities | Measured on recurring basis | Level 3 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 3 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 3 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Residential mortgage-backed securities | Measured on recurring basis | Level 3 | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Collateralized mortgage obligations | Measured on recurring basis | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	104,153	52,331
Collateralized mortgage obligations | Measured on recurring basis | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	214,388	207,033
Collateralized mortgage obligations | Measured on recurring basis | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	143,754	165,508
Collateralized mortgage obligations | Measured on recurring basis | Level 1 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Collateralized mortgage obligations | Measured on recurring basis | Level 1 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Collateralized mortgage obligations | Measured on recurring basis | Level 1 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0
Collateralized mortgage obligations | Measured on recurring basis | Level 2 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	104,153	52,331
Collateralized mortgage obligations | Measured on recurring basis | Level 2 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	214,388	207,033
Collateralized mortgage obligations | Measured on recurring basis | Level 2 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	143,754	165,508
Collateralized mortgage obligations | Measured on recurring basis | Level 3 | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Collateralized mortgage obligations | Measured on recurring basis | Level 3 | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Collateralized mortgage obligations | Measured on recurring basis | Level 3 | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0
Interest rate swaps | Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	18,420	6,445
Interest rate swaps	18,472	6,445
Interest rate swaps | Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	0	0
Interest rate swaps	0	0
Interest rate swaps | Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	18,420	6,445
Interest rate swaps	18,472	6,445
Interest rate swaps | Measured on recurring basis | Level 3
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	0	0
Interest rate swaps	$ 0	$ 0

Disclosures About Fair Value _5

Disclosures About Fair Value of Financial Instruments - Nonrecurring Assets that had Fair Market Values Below the Carrying Amount (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	$ 0	$ 0
Total financial assets	135,730	93,279
Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	0	0
Total financial assets	893,861	830,341
Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	8,627,759	7,845,313
Total financial assets	8,627,759	7,845,313
Fair Value, Measurements, Nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Real estate owned	2,070	2,498
Total financial assets	41,712	42,831
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	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	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	2,070	2,498
Total financial assets	41,712	42,831
Loans measured for impairment | Fair Value, Measurements, Nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	39,642	40,333
Loans measured for impairment | Fair Value, Measurements, Nonrecurring | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	0	0
Loans measured for impairment | Fair Value, Measurements, Nonrecurring | Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	0	0
Loans measured for impairment | Fair Value, Measurements, Nonrecurring | Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Loans measured for impairment	$ 39,642	$ 40,333

Disclosures About Fair Value _6

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	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Estimated cost to sell | Loans measured for impairment
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 | Loans measured for impairment | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.0425
Discount rate | Loans measured for impairment | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.110
Discount rate | Loans measured for impairment | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated cost to sell loans measured for impairment	0.0750
Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate owned	$ 2,070	$ 2,498
Loans measured for impairment | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans measured for impairment	$ 39,642	$ 40,333

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) $ in Millions	Jun. 30, 2019USD ($)
Cash Flow Hedging | Interest rate swaps
Derivative [Line Items]
Derivative notional amount	$ 50

Derivative Financial Instrume_4

Derivative Financial Instruments - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Asset Derivatives, Notional Amount	$ 281,602	$ 221,919
Asset Derivatives, Fair Value	18,507	6,445
Liability Derivatives, Notional Amount	281,602	221,919
Liability Derivatives, Fair Value	18,559	6,445
Not Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Asset Derivatives, Notional Amount	281,602	221,919
Asset Derivatives, Fair Value	18,507	6,445
Liability Derivatives, Notional Amount	281,602	221,919
Liability Derivatives, Fair Value	$ 18,559	$ 6,445

Derivative Financial Instrume_5

Derivative Financial Instruments - Gain (Loss) on Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Hedging interest rate derivatives:
Increase in interest expense	$ 0		$ 0
Increase in interest expense		$ 267		$ 600
Non-hedging swap derivatives:
Increase in other income	$ 0	$ (417)	$ 0	$ (288)

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Changes in accumulated other comprehensive income by component
Balance beginning of the period	$ 1,316,276	$ 1,215,254	$ 1,257,638	$ 1,207,724
Other comprehensive income before reclassification adjustments	5,608	(1,023)
Amounts reclassified from accumulated other comprehensive income	208	151
Other comprehensive income/(loss)	5,816	(872)	10,477	(4,267)
Balance end of the period	1,333,588	1,228,880	1,333,588	1,228,880
Reclassification adjustment for gains included in net income, net of tax	1	75	2	94
Reclassification adjustment for gains included in net income, tax	(1)	(30)	(1)	(37)
Reclassification adjustment for prior period service costs included in net income, tax	85	91	167	181
Unrealized gains and (losses) on securities available- for-sale
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(2,380)	(9,381)	(6,832)	(4,409)
Reclassification due to adoption of ASU No. 2018-02				(991)
Other comprehensive income before reclassification adjustments	5,608	(1,237)	10,061	(5,199)
Amounts reclassified from accumulated other comprehensive income	(1)	(75)	(2)	(94)
Other comprehensive income/(loss)	5,607	(1,312)	10,059	(5,293)
Balance end of the period	3,227	(10,693)	3,227	(10,693)
Reclassification adjustment for gains included in net income, net of tax	2	105	3	131
Reclassification adjustment for gains included in net income, tax	1	(30)	(1)	37
Change in fair value of interest rate swaps
Changes in accumulated other comprehensive income by component
Balance beginning of the period	0		0
Other comprehensive income before reclassification adjustments	0		0
Amounts reclassified from accumulated other comprehensive income	0		0
Other comprehensive income/(loss)	0	214	0
Balance end of the period	0		0
Change in fair value of interest rate swaps
Changes in accumulated other comprehensive income by component
Balance beginning of the period		(480)		(691)
Reclassification due to adoption of ASU No. 2018-02				(149)
Other comprehensive income before reclassification adjustments		214		574
Amounts reclassified from accumulated other comprehensive income		0		0
Other comprehensive income/(loss)				574
Balance end of the period		(266)		(266)
Change in defined benefit pension plans
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(32,655)	(32,360)	(32,864)	(26,980)
Reclassification due to adoption of ASU No. 2018-02				(5,606)
Other comprehensive income before reclassification adjustments	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	209	226	418	452
Other comprehensive income/(loss)	209	226	418	452
Balance end of the period	(32,446)	(32,134)	(32,446)	(32,134)
Reclassification adjustment for prior period service costs included in net income, net of tax	580	580	1,161	1,161
Reclassification adjustment for defined benefit plan loss included in net income, net of tax	(890)	(897)	1,780	(1,794)
Reclassification adjustment for prior period service costs included in net income, tax	85	91	167	181
Total
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(35,035)	(42,221)	(39,696)	(32,080)
Reclassification due to adoption of ASU No. 2018-02				(6,746)
Other comprehensive income before reclassification adjustments			10,061	(4,625)
Amounts reclassified from accumulated other comprehensive income			416	358
Other comprehensive income/(loss)	5,816	(872)	10,477	(4,267)
Balance end of the period	$ (29,219)	$ (43,093)	$ (29,219)	$ (43,093)

Uncategorized Items - a2019-06x

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 344,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(1,226,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	344,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (1,226,000)