10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

xQuarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended September 30, 2018

or

oTransition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                  to                  

Commission File Number 001-34582

NORTHWEST BANCSHARES, INC.

(Exact name of registrant as specified in its charter)

Maryland	27-0950358
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
100 Liberty Street, Warren, Pennsylvania	16365
(Address of principal executive offices)	(Zip Code)

(814) 726-2140

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

xLarge accelerated filer     oAccelerated filer

oNon-accelerated filer     o    Smaller reporting company

o    Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a Shell Company (as defined in Rule 12b-2 of the Exchange Act).Yes o No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

Common Stock ($0.01 par value), 103,300,768 shares outstanding as of October 31, 2018

NORTHWEST BANCSHARES, INC.

INDEX

		PAGE
PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated Statements of Financial Condition as of September 30, 2018 and December 31, 2017 (Unaudited)	1
	Consolidated Statements of Income for the quarter and nine months ended September 30, 2018 and 2017 (Unaudited)	2
	Consolidated Statements of Comprehensive Income for the quarter and nine months ended September 30, 2018 and 2017 (Unaudited)	3
	Consolidated Statements of Changes in Shareholders’ Equity for the quarter and nine months ended September 30, 2018 and 2017 (Unaudited)	4
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017 (Unaudited)	6
	Notes to Consolidated Financial Statements (Unaudited)	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	46
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	60
Item 4.	Controls and Procedures	62
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	62
Item 1A.	Risk Factors	62
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	62
Item 3.	Defaults Upon Senior Securities	63
Item 4.	Mine Safety Disclosures	63
Item 5.	Other information	63
Item 6.	Exhibits	63
	Signature	64
	Certifications

ITEM 1. FINANCIAL STATEMENTS

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited)

(in thousands, except share data)

	September 30, 2018			December 31, 2017
Assets
Cash and due from banks	$	73,946		77,710
Marketable securities available-for-sale (amortized cost of $829,345 and $800,094)	811,556			792,535
Marketable securities held-to-maturity (fair value of $23,534 and $29,667)	24,222			29,678
Total cash and cash equivalents and marketable securities	909,724			899,923
Personal Banking loans:
Residential mortgage loans held-for-sale	—			3,128
Residential mortgage loans	2,846,834			2,773,075
Home equity loans	1,272,345			1,310,355
Consumer loans	776,049			671,389
Total Personal Banking loans	4,895,228			4,757,947
Commercial Banking loans:
Commercial real estate loans	2,518,066			2,454,726
Commercial loans	582,768			580,736
Total Commercial Banking loans	3,100,834			3,035,462
Total loans	7,996,062			7,793,409
Allowance for loan losses	(55,975		)	(56,795	)
Total loans, net	7,940,087			7,736,614
Federal Home Loan Bank stock, at cost	15,452			11,733
Accrued interest receivable	25,798			23,352
Real estate owned, net	2,486			5,666
Premises and equipment, net	144,612			151,944
Bank owned life insurance	170,042			171,547
Goodwill	307,420			307,420
Other intangible assets	21,167			25,669
Other assets	38,543			30,066
Total assets	$	9,575,331		9,363,934
Liabilities and Shareholders’ Equity
Liabilities:
Noninterest-bearing checking deposits	$	1,724,202		1,610,409
Interest-bearing checking deposits	1,499,344			1,442,928
Money market deposit accounts	1,676,845			1,707,450
Savings deposits	1,650,357			1,653,579
Time deposits	1,403,205			1,412,623
Total deposits	7,953,953			7,826,989
Borrowed funds	179,117			108,238
Junior subordinated debentures	111,213			111,213
Advances by borrowers for taxes and insurance	23,297			40,825
Accrued interest payable	627			460
Other liabilities	66,448			68,485
Total liabilities	8,334,655			8,156,210
Shareholders’ equity:
Preferred stock, $0.01 par value: 50,000,000 authorized, no shares issued	—			—
Common stock, $0.01 par value: 500,000,000 shares authorized, 103,293,480 shares and 102,394,828 shares issued, respectively	1,033			1,027
Paid-in capital	742,863			730,719
Retained earnings	541,469			508,058
Accumulated other comprehensive loss	(44,689		)	(32,080	)
Total shareholders’ equity	1,240,676			1,207,724
Total liabilities and shareholders’ equity	$	9,575,331		9,363,934

See accompanying notes to unaudited consolidated financial statements

1

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF INCOME (Unaudited)

(in thousands, except per share data)

	Quarter ended September 30,					Nine months ended September 30,
	2018			2017		2018		2017
Interest income:
Loans receivable	$	90,733		85,373		264,059		252,838
Mortgage-backed securities	3,572			3,118		9,839		8,327
Taxable investment securities	814			957		2,140		2,944
Tax-free investment securities	205			476		908		1,574
FHLB dividends	119			63		301		172
Interest-earning deposits	162			244		766		1,440
Total interest income	95,605			90,231		278,013		267,295
Interest expense:
Deposits	8,233			5,795		22,000		17,086
Borrowed funds	1,555			1,199		4,203		3,664
Total interest expense	9,788			6,994		26,203		20,750
Net interest income	85,817			83,237		251,810		246,545
Provision for loan losses	6,982			3,027		16,540		13,226
Net interest income after provision for loan losses	78,835			80,210		235,270		233,319
Noninterest income:
Gain on sale of investments	—			1,497		153		1,517
Service charges and fees	13,158			12,724		37,965		37,190
Trust and other financial services income	4,254			4,793		12,335		13,697
Insurance commission income	2,046			1,992		6,885		7,139
Loss on real estate owned, net	(247		)	(193	)	(617	)	(490	)
Income from bank owned life insurance	1,460			1,078		4,783		3,798
Mortgage banking income	82			519		383		1,193
Gain on sale of offices	—			—		—		17,186
Other operating income	1,804			2,184		6,567		6,345
Total noninterest income	22,557			24,594		68,454		87,575
Noninterest expense:
Compensation and employee benefits	37,535			36,556		113,076		113,003
Premises and occupancy costs	6,821			6,951		20,952		21,570
Office operations	3,508			3,939		10,684		12,331
Collections expense	483			568		1,429		1,670
Processing expenses	9,620			9,650		28,886		29,198
Marketing expenses	1,949			2,488		6,103		7,482
Federal deposit insurance premiums	721			771		2,109		2,794
Professional services	2,368			2,321		7,464		7,348
Amortization of intangible assets	1,462			1,691		4,502		5,189
Real estate owned expense	205			310		630		809
Restructuring/ acquisition expense	186			1,398		579		4,255
Other expenses	1,759			2,156		7,411		8,058
Total noninterest expense	66,617			68,799		203,825		213,707
Income before income taxes	34,775			36,005		99,899		107,187
Federal and state income taxes expense	7,035			12,414		20,875		34,868
Net income	$	27,740		23,591		79,024		72,319
Basic earnings per share	$	0.27		0.23		0.78		0.72
Diluted earnings per share	$	0.27		0.23		0.76		0.71

See accompanying notes to unaudited consolidated financial statements

2

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

(in thousands)

	Quarter ended September 30,					Nine months ended September 30,
	2018			2017		2018		2017
Net income	$	27,740		23,591		79,024		72,319
Other comprehensive income net of tax:
Net unrealized holding gains/ (losses) on marketable securities:
Unrealized holding gains/ (losses) net of tax of $788, $164, $2,869, and $(995), respectively	(1,970		)	(264	)	(7,169	)	1,684
Reclassification adjustment for gains included in net income, net of tax of $17, $369, $54 and $416, respectively	(44		)	(674	)	(138	)	(741	)
Net unrealized holding gains/ (losses) on marketable securities	(2,014		)	(938	)	(7,307	)	943
Change in fair value of interest rate swaps, net of tax of $(51), $(138), $(204), and $(419), respectively	192			258		766		779
Defined benefit plan:
Reclassification adjustments for prior period service costs and net losses included in net income, net of tax of $(90), $(153), $(271) and $(460), respectively	226			221		678		662
Other comprehensive income/ (loss)	(1,596		)	(459	)	(5,863	)	2,384
Total comprehensive income	$	26,144		23,132		73,161		74,703

See accompanying notes to unaudited consolidated financial statements

3

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (Unaudited)

(dollars in thousands, expect share data)

Quarter ended September 30, 2017

							Accumulated Other		Total
	Common Stock			Paid-in	Retained		Comprehensive		Shareholders’
	Shares	Amount		Capital	Earnings		Loss		Equity
Balance at June 30, 2017	102,478,146	$	1,025	726,036	495,017		(25,148	)	1,196,930
Comprehensive income:
Net income	—	—		—	23,591		—		23,591
Other comprehensive income, net of tax of $242	—	—		—	—		(459	)	(459	)
Total comprehensive income	—	—		—	23,591		(459	)	23,132
Exercise of stock options	87,521	1		1,033	—		—		1,034
Stock-based compensation expense	—	—		1,094	—		—		1,094
Dividends paid ($0.16 per share)	—	—		—	(16,343	)	—		(16,343	)
Balance at September 30, 2017	102,565,667	$	1,026	728,163	502,265		(25,607	)	1,205,847

Quarter ended September 30, 2018

								Accumulated Other		Total
	Common Stock				Paid-in	Retained		Comprehensive		Shareholders’
	Shares		Amount		Capital	Earnings		Loss		Equity
Balance at June 30, 2018	103,122,890		$	1,031	739,673	531,269		(43,093	)	1,228,880
Comprehensive income:
Net income	—		—		—	27,740		—		27,740
Other comprehensive loss, net of tax of $664	—		—		—	—		(1,596	)	(1,596	)
Total comprehensive income/ (loss)	—		—		—	27,740		(1,596	)	26,144
Exercise of stock options	178,109		2		1,918	—		—		1,920
Stock-based compensation expense	—		—		1,272	—		—		1,272
Stock-based compensation forfeited	(7,519	)	—		—	—		—		—
Dividends paid ($0.17 per share)	—		—		—	(17,540	)	—		(17,540	)
Balance at September 30, 2018	103,293,480		$	1,033	742,863	541,469		(44,689	)	1,240,676

See accompanying notes to unaudited consolidated financial statements

4

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (Unaudited)

(dollars in thousands, expect share data)

Nine months endedSeptember 30, 2017

							Accumulated Other		Total
	Common Stock			Paid-in	Retained		Comprehensive		Shareholders’
	Shares	Amount		Capital	Earnings		Loss		Equity
Beginning balance at December 31, 2016	101,699,406	$	1,017	718,834	478,803		(27,991	)	1,170,663
Comprehensive income:
Net income	—	—		—	72,319		—		72,319
Other comprehensive income, net of tax of $(1,458)	—	—		—	—		2,384		2,384
Total comprehensive income	—	—		—	72,319		2,384		74,703
Exercise of stock options	488,211	5		5,611	—		—		5,616
Stock-based compensation expense	378,050	4		3,718	—		—		3,722
Dividends paid ($0.48 per share)	—	—		—	(48,857	)	—		(48,857	)
Ending balance at September 30, 2017	102,565,667	$	1,026	728,163	502,265		(25,607	)	1,205,847

Nine months endedSeptember 30, 2018

									Accumulated Other		Total
	Common Stock					Paid-in	Retained		Comprehensive		Shareholders’
	Shares		Amount			Capital	Earnings		Loss		Equity
Beginning balance at December 31, 2017	102,394,828		$	1,027		730,719	508,058		(32,080	)	1,207,724
Reclassification due to adoption of ASU No. 2018-02	—		—			—	6,746		(6,746	)	—
Comprehensive income:
Net income	—		—			—	79,024		—		79,024
Other comprehensive loss, net of tax of $2,448	—		—			—	—		(5,863	)	(5,863	)
Total comprehensive income/ (loss)	—		—			—	85,770		(12,609	)	73,161
Exercise of stock options	674,538		7			7,595	—		—		7,602
Stock-based compensation expense	414,330		4			4,544	—		—		4,548
Stock-based compensation forfeited	(190,216	)	(5		)	5	—		—		—
Dividends paid ($0.51 per share)	—		—			—	(52,359	)	—		(52,359	)
Ending balance at September 30, 2018	103,293,480		$	1,033		742,863	541,469		(44,689	)	1,240,676

See accompanying notes to unaudited consolidated financial statements

5

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(in thousands)

	Nine months ended September 30,
	2018			2017
OPERATING ACTIVITIES:
Net Income	$	79,024		72,319
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	16,540			13,226
Net (gain)/ loss on sale of assets	1,758			(1,443	)
Net gain on sale of offices	—			(17,186	)
Net depreciation, amortization and accretion	7,598			10,951
(Increase)/ decrease in other assets	(8,952		)	20,968
Decrease in other liabilities	48			1,761
Net amortization on marketable securities	1,317			1,535
Noncash write-down of real estate owned	1,281			980
Deferred income tax expense	22			—
Origination of loans held for sale	(1,297		)	(59,401	)
Proceeds from sale of loans held for sale	4,501			68,041
Noncash compensation expense related to stock benefit plans	4,548			3,722
Net cash provided by operating activities	106,388			115,473
INVESTING ACTIVITIES:
Purchase of marketable securities held-to-maturity	—			(23,621	)
Purchase of marketable securities available-for-sale	(215,242		)	(210,111	)
Proceeds from maturities and principal reductions of marketable securities held-to-maturity	5,439			11,625
Proceeds from maturities and principal reductions of marketable securities available-for-sale	179,640			144,846
Proceeds from sale of marketable securities available-for-sale	5,206			23,501
Proceeds from bank-owed life insurance	357			1,550
Loan originations	(2,256,146		)	(2,050,885	)
Proceeds from loan maturities and principal reductions	2,036,656			2,002,816
Net purchase of Federal Home Loan Bank stock	(3,719		)	(594	)
Proceeds from sale of real estate owned	5,082			3,687
Sale of real estate owned for investment, net	455			456
Purchase of premises and equipment	(3,438		)	(1,242	)
Net cash used in investing activities	(245,710		)	(97,972	)

6

NORTHWEST BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (continued)

(in thousands)

	Nine months ended September 30,
	2018			2017
FINANCING ACTIVITIES:
Increase/ (decrease) in deposits, net	$	126,964		(155,925	)
Net increase/ (decrease) in short-term borrowings	70,879			(27,511	)
Decrease in advances by borrowers for taxes and insurance	(17,528		)	(15,015	)
Cash dividends paid	(52,359		)	(48,857	)
Proceeds from stock options exercised	7,602			5,616
Net cash provided by/ (used in) financing activities	135,558			(241,692	)
Net decrease in cash and cash equivalents	$	(3,764	)	(224,191	)
Cash and cash equivalents at beginning of period	$	77,710		389,867
Net decrease in cash and cash equivalents	(3,764		)	(224,191	)
Cash and cash equivalents at end of period	$	73,946		165,676
Cash paid during the period for:
Interest on deposits and borrowings (including interest credited to deposit accounts of $20,927 and $16,644, respectively)	$	26,036		20,875
Income taxes	$	19,299		20,705
Non-cash activities:
Loan foreclosures and repossessions	$	5,034		6,392
Sale of real estate owned financed by the Company	$	183		168

See accompanying notes to unaudited consolidated financial statements

7

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Unaudited

(1) 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 172 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. 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, 2017 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 nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other period.

Stock-Based Compensation

On May 14, 2018, the Company awarded employees 831,160 stock options and directors 64,800 stock options with an exercise price of $16.59 and grant date fair value of $1.49 per stock option, and the Company awarded employees 390,030 restricted common shares and directors 24,300 restricted common shares with a grant date fair value of $16.59. 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 $1.3 million and $1.1 million for the quarters ended September 30, 2018 and 2017, and $4.5 million and $3.7 million for the nine months ended September 30, 2018 and 2017, respectively, was recognized in compensation expense relating to our stock benefit plans. At September 30, 2018 there was compensation expense of $4.3 million to be recognized for awarded but unvested stock options and $18.6 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 September 30, 2018 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, 2017, 2016 and 2015. 

8

Recently Adopted Accounting Standards

In May 2014 the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606)”. Effective January 1, 2018, we adopted the ASU and all related amendments to all contracts using the modified retrospective approach, with the cumulative effect recorded as an adjustment to opening retained earnings. Due to immateriality, we had no cumulative effect to record. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis.     

Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The services that fall within the scope of ASC 606 include service charges and fees, trust and other financial services income, insurance commission income, sale of OREO and other operating income.

Revenue is recognized when performance obligations under the terms of a contract with our customers are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The majority of our revenue continues to be recognized at the point in time when the services are provided to our customers.

Service charges and fees represents income earned on both loan and deposit accounts as well as interchange income. Service charges on deposit accounts primarily consist of overdraft, non-sufficient funds, ATM transaction fees and account management fees. Revenue is recognized at the point in time the transaction occurs or the service is provided to the customer. We earn interchange income from debit and credit cardholder transactions processed through payment networks. Interchange fees represent a percentage of the underlying transaction value and are generally set by the credit card associations. Interchange fees are recognized as transactions occur.

We provide trust management services and investment management services to our customers and recognize revenue as these management services are provided. Trust and investment management services are billed and paid on a monthly or quarterly basis. Additionally, we earn commissions on investment products that are sold to our customers. These commissions are recognized at the time of the sale of the third party’s product or services to our customers.

Our insurance subsidiary is an employee benefits and property and casualty insurance agency specializing in commercial and personal insurance as well as retirement benefit plans. Insurance commission income is earned at the time of sale of the third party’s product or service to our customers.

Loss on real estate owned represents gains and losses on real estate acquired by Northwest through the foreclosure process. Proceeds from the sale of these properties are recognized when control of the property transfers to the buyer. In certain instances the Bank may finance a portion of the purchase price paid by the buyer and an additional evaluation of whether all of the contract criteria are met is required. If it is not probable that we will collect substantially all of the consideration expected, the transaction would not be accounted for as a sale until the concerns about collectability are resolved.

Other operating income consists primarily of revenues earned for providing transaction services to our deposit customers. The revenue is earned at the point in time the transaction occurs.

We have evaluated the nature of our contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary.    

In January 2016 the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10)”. This guidance requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted this guidance as of January 1, 2018 which did not have a material impact on our results of operations and financial position. Additionally, this guidance requires entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. Accordingly, we refined the calculation used to determine the disclosed fair value of our loans held for investment portfolio as part of adopting this standard. The refined calculation did not have a significant impact on our fair value disclosures. Refer to note 9, "Disclosures About Fair Value of Financial Instruments".

9

In August 2016, the FASB issued ASU No. 2016-15, “Classification of Certain Cash Receipts and Cash Payments”. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This guidance is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We adopted this guidance as of January 1, 2018 and applied it on a retrospective basis. No material reclassifications were made for the nine months ended September 30, 2017 and we do not expect the reclassifications to be material for the full year.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". This guidance eliminates the requirement to determine the fair value of individual assets and liabilities of a reporting unit to measure goodwill impairment. Under this guidance goodwill impairment testing will be performed by comparing the fair value of the reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. This guidance is effective for annual and interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017.We have elected to early adopt this standard as of January 1, 2018 and the amendments were applied on a prospective basis. The adoption did not have a material impact on the consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, “Compensation Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Costs and Net Periodic Postretirement Benefit Costs". This guidance provides financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. This guidance is effective for annual and interim periods beginning after December 15, 2017 and should be applied retrospectively. We adopted this standard as of January 1, 2018. The other components of the net periodic benefit cost for the quarter and nine months ended September 30, 2017 totaled $517,000 and $1.6 million, respectively, and were reclassified from compensation and employee benefits to other expense.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This guidance permits a reclassification from accumulated other comprehensive income to retained earnings of the stranded tax effects resulting from the Tax Cuts and Jobs Act. This guidance is effective for annual or interim reporting periods beginning after December 15, 2018 but permits early adoption in a period for which financial statements have not been issued. We have elected to early adopt the ASU as of January 1, 2018. The reclassification from accumulated other comprehensive income to retained earnings was $6.7 million for the release of stranded income tax benefits relating to the unrealized net gains and losses on available for sale securities and the change in fair value of our interest rate swaps and our pension plan. Our policy for releasing income tax effects from accumulated other comprehensive income is to release them when investments are sold or matured and liabilities are extinguished.

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU 2016-2, “Leases”. This guidance requires a lessee to recognize in the statement of financial condition a liability to make lease payments and a right-of-use asset representing the right to use the underlying asset for the term of the lease. Optional periods should only be recognized if the lessee is reasonably certain to exercise the option. For leases with a term of twelve months or less, the lessee is permitted not to recognize lease assets and lease liabilities and should recognize lease expense for such leases generally on a straight-line basis over the term of the lease. This guidance is effective for annual periods beginning after December 15, 2018, including interim periods within those years and early adoption is permitted. We lease certain branch and office facilities or land under operating leases. While we are currently evaluating the impact this guidance will have on our results of operations and financial position, we expect the primary impact on the consolidated statement of financial position will be the recognition of right-of-use assets and lease obligations under the ASU as a result of our minimum commitments under non-cancellable operating leases. Our current minimum commitments under non-cancellable operating leases are disclosed in Note 7, “Premises and Equipment” in our Annual Report on Form 10-K for the year ended December 31, 2017. We expect to apply the package of practical expedients included therein, as well as utilize the transition method included in ASU 2018-11. By applying ASU 2016-02 at the adoption date, as opposed to at the beginning of the earliest period presented, our reporting for periods prior to January 1, 2019 will continue to be in accordance with Leases (Topic 840).

10

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 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 partnered 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.

11

(2)    Investment securities and impairment of investment securities

The following table shows the portfolio of investment securities available-for-sale at September 30, 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 after one year through five years	$	14,707	—	(12	)	14,695
Debt issued by government sponsored enterprises:
Due in one year or less	70,096		—	(895	)	69,201
Due after one year through five years	116,097		—	(2,560	)	113,537
Due after ten years	3,822		—	(115	)	3,707
Municipal securities:
Due in one year or less	2,351		3	(7	)	2,347
Due after one year through five years	3,553		43	(11	)	3,585
Due after five years through ten years	11,714		46	(23	)	11,737
Due after ten years	7,073		31	(29	)	7,075
Corporate debt issues:
Due after five years through ten years	912		—	—		912
Residential mortgage-backed securities:
Fixed rate pass-through	131,255		514	(5,689	)	126,080
Variable rate pass-through	26,374		1,064	(5	)	27,433
Fixed rate non-agency CMOs	—		—	—		—
Fixed rate agency CMOs	374,900		5	(10,595	)	364,310
Variable rate agency CMOs	66,491		467	(21	)	66,937
Total residential mortgage-backed securities	599,020		2,050	(16,310	)	584,760
Total marketable securities available-for-sale	$	829,345	2,173	(19,962	)	811,556

12

The following table shows the portfolio of investment securities available-for-sale at December 31, 2017 (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	$	1	—	—		1
Debt issued by government sponsored enterprises:
Due in one year or less	66,566		14	(289	)	66,291
Due after one year through five years	140,624		—	(2,402	)	138,222
Due after ten years	4,833		—	(77	)	4,756
Equity securities	551		29	(6	)	574
Municipal securities:
Due in one year or less	2,492		7	(1	)	2,498
Due after one year through five years	7,072		82	(6	)	7,148
Due after five years through ten years	14,576		171	—		14,747
Due after ten years	26,371		292	—		26,663
Corporate debt issues:
Due after ten years	909		—	—		909
Residential mortgage-backed securities:
Fixed rate pass-through	144,411		1,108	(2,817	)	142,702
Variable rate pass-through	33,079		1,464	(6	)	34,537
Fixed rate non-agency CMOs	15		—	—		15
Fixed rate agency CMOs	284,320		37	(5,271	)	279,086
Variable rate agency CMOs	74,274		249	(137	)	74,386
Total residential mortgage-backed securities	536,099		2,858	(8,231	)	530,726
Total marketable securities available-for-sale	$	800,094	3,453	(11,012	)	792,535

The following table shows the portfolio of investment securities held-to-maturity at September 30, 2018 (in thousands):

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,027	44	—		3,071
Variable rate pass-through	1,778		39	—		1,817
Fixed rate agency CMOs	18,753		—	(782	)	17,971
Variable rate agency CMOs	664		11	—		675
Total residential mortgage-backed securities	24,222		94	(782	)	23,534
Total marketable securities held-to-maturity	$	24,222	94	(782	)	23,534

13

The following table shows the portfolio of investment securities held-to-maturity at December 31, 2017 (in thousands): 

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,760	140	—		3,900
Variable rate pass-through	2,283		64	—		2,347
Fixed rate agency CMOs	22,906		20	(248	)	22,678
Variable rate agency CMOs	729		13	—		742
Total residential mortgage-backed securities	29,678		237	(248	)	29,667
Total marketable securities held-to-maturity	$	29,678	237	(248	)	29,667

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 September 30, 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	$	55,650	(210	)	130,795	(3,360	)	186,445	(3,570	)
Municipal securities	9,025		(70	)	—	—		9,025	(70	)
Residential mortgage-backed securities - agency	176,316		(2,095	)	329,287	(14,997	)	505,603	(17,092	)
U.S. government and agencies	14,695		(12	)	—	—		14,695	(12	)
Total temporarily impaired securities	$	255,686	(2,387	)	460,082	(18,357	)	715,768	(20,744	)

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, 2017 (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	$	5,006	(7	)	197,695	(2,761	)	202,701	(2,768	)
Equity Securities	—		—		544	(6	)	544	(6	)
Municipal Securities	4,563		(7	)	—	—		4,563	(7	)
Residential mortgage-backed securities - agency	239,703		(2,522	)	202,344	(5,957	)	442,047	(8,479	)
Total temporarily impaired securities	$	249,272	(2,536	)	400,583	(8,724	)	649,855	(11,260	)

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.

14

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 and nine months ended September 30,:

	2018		2017
Beginning balance at July 1, (1)	$	—	7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—		—
Reduction for securities sold/ called realized during the quarter	—		—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—		—
Ending balance at September 30,	$	—	7,942

	2018			2017
Beginning balance at January 1, (1)	$	352		7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—			—
Reduction for losses realized during the quarter	(352		)	—
Reduction for securities sold/ called realized during the nine months	—			—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—			—
Ending balance at September 30,	$	—		7,942

(1) The beginning balance represents credit losses included in other-than-temporary impairment charges recognized on debt

securities in prior periods.

15

(3)    Loans receivable

 The following table shows a summary of our loans receivable at September 30, 2018 and December 31, 2017 (in thousands): 

	September 30, 2018							December 31, 2017
	Originated			Acquired		Total		Originated		Acquired		Total
Personal Banking:
Residential mortgage loans (1)	$	2,745,190		97,822		2,843,012		2,658,726		113,823		2,772,549
Home equity loans	1,048,373			223,972		1,272,345		1,051,558		258,797		1,310,355
Consumer finance loans (2)	5,888			—		5,888		18,619		—		18,619
Consumer loans	685,252			66,284		751,536		540,832		97,877		638,709
Total Personal Banking	4,484,703			388,078		4,872,781		4,269,735		470,497		4,740,232
Commercial Banking:
Commercial real estate loans	2,477,581			241,307		2,718,888		2,303,179		296,161		2,599,340
Commercial loans	594,939			51,164		646,103		572,341		60,822		633,163
Total Commercial Banking	3,072,520			292,471		3,364,991		2,875,520		356,983		3,232,503
Total loans receivable, gross	7,557,223			680,549		8,237,772		7,145,255		827,480		7,972,735
Deferred loan costs	32,846			936		33,782		26,255		1,527		27,782
Allowance for loan losses	(51,473		)	(4,502	)	(55,975	)	(50,572	)	(6,223	)	(56,795	)
Undisbursed loan proceeds:
Residential mortgage loans	(11,335		)	—		(11,335	)	(10,067	)	—		(10,067	)
Commercial real estate loans	(200,152		)	(670	)	(200,822	)	(141,967	)	(2,647	)	(144,614	)
Commercial loans	(62,175		)	(1,160	)	(63,335	)	(51,143	)	(1,284	)	(52,427	)
Total loans receivable, net	$	7,264,934		675,153		7,940,087		6,917,761		818,853		7,736,614

(1) Includes $0 and $3.1 million of loans held for sale at September 30, 2018 and December 31, 2017, respectively.

(2) Represents loans from our consumer finance subsidiary that was closed in 2017, which are no longer being originated.

Acquired loans were initially measured at fair value and subsequently accounted for under either Accounting Standards Codification (“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): 

	September 30, 2018		December 31, 2017
Acquired loans evaluated individually for future credit losses:
Outstanding principal balance	$	8,446	9,735
Carrying value	5,871		6,875
Acquired loans evaluated collectively for future credit losses:
Outstanding principal balance	678,540		824,205
Carrying value	673,784		818,201
Total acquired loans:
Outstanding principal balance	686,986		833,940
Carrying value	679,655		825,076

16

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, 2016	$	2,187
Accretion	(1,318		)
Net reclassification from nonaccretable yield	671
Balance at December 31, 2017	1,540
Accretion	(588		)
Net reclassification from nonaccretable yield	—
Balance at September 30, 2018	$	952

The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the nine months endedSeptember 30, 2018 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,099	1,741	13	1,140	135
Home equity loans	1,019		1,977	7	1,081	127
Consumer loans	32		95	4	46	31
Total Personal Banking	2,150		3,813	24	2,267	293
Commercial Banking:
Commercial real estate loans	3,643		4,548	1	4,015	287
Commercial loans	78		85	—	91	8
Total Commercial Banking	3,721		4,633	1	4,106	295
Total	$	5,871	8,446	25	6,373	588

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, 2017 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,182	1,880	24	1,251	181
Home equity loans	1,143		2,219	21	1,253	157
Consumer loans	59		160	4	97	51
Total Personal Banking	2,384		4,259	49	2,601	389
Commercial Banking:
Commercial real estate loans	4,388		5,363	39	6,992	914
Commercial loans	103		113	—	177	15
Total Commercial Banking	4,491		5,476	39	7,169	929
Total	$	6,875	9,735	88	9,770	1,318

17

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 September 30, 2018 (in thousands):               

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance June 30, 2018
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	491		(204	)	200	3,657
Home equity loans	3,234		(351	)	(323	)	69	3,839
Consumer finance loans	1,650		(437	)	(445	)	178	2,354
Consumer loans	11,021		4,023		(3,392	)	630	9,760
Total Personal Banking	20,049		3,726		(4,364	)	1,077	19,610
Commercial Banking:
Commercial real estate loans	25,694		8,723		(4,820	)	772	21,019
Commercial loans	5,730		(3,945	)	(914	)	80	10,509
Total Commercial Banking	31,424		4,778		(5,734	)	852	31,528
Total originated loans	51,473		8,504		(10,098	)	1,929	51,138
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(70	)	(10	)	12	170
Home equity loans	408		(173	)	(103	)	22	662
Consumer loans	444		(448	)	(78	)	55	915
Total Personal Banking	954		(691	)	(191	)	89	1,747
Commercial Banking:
Commercial real estate loans	2,876		(532	)	(39	)	25	3,422
Commercial loans	672		(299	)	(71	)	17	1,025
Total Commercial Banking	3,548		(831	)	(110	)	42	4,447
Total acquired loans	4,502		(1,522	)	(301	)	131	6,194
Total	$	55,975	6,982		(10,399	)	2,060	57,332

18

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 September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance June 30, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(462	)	(211	)	24	4,635
Home equity loans	3,295		615		(285	)	8	2,957
Consumer finance loans	4,876		4,220		(3,891	)	80	4,467
Consumer loans	7,383		4,594		(2,844	)	353	5,280
Total Personal Banking	19,540		8,967		(7,231	)	465	17,339
Commercial Banking:
Commercial real estate loans	20,174		(2,529	)	(163	)	282	22,584
Commercial loans	11,131		(5,445	)	(204	)	76	16,704
Total Commercial Banking	31,305		(7,974	)	(367	)	358	39,288
Total originated loans	50,845		993		(7,598	)	823	56,627
Acquired loans:
Personal Banking:
Residential mortgage loans	77		(11	)	(4	)	7	85
Home equity loans	748		324		(243	)	44	623
Consumer loans	594		106		(158	)	18	628
Total Personal Banking	1,419		419		(405	)	69	1,336
Commercial Banking:
Commercial real estate loans	3,301		2,433		(1,738	)	160	2,446
Commercial loans	1,362		(818	)	(305	)	9	2,476
Total Commercial Banking	4,663		1,615		(2,043	)	169	4,922
Total acquired loans	6,082		2,034		(2,448	)	238	6,258
Total	$	56,927	3,027		(10,046	)	1,061	62,885

19

The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2018 (in thousands):

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance December 31, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	678		(710	)	352	3,824
Home equity loans	3,234		(164	)	(866	)	192	4,072
Consumer finance loans	1,650		(469	)	(2,484	)	635	3,968
Other consumer loans	11,021		9,845		(9,192	)	1,893	8,475
Total Personal Banking	20,049		9,890		(13,252	)	3,072	20,339
Commercial Banking:
Commercial real estate loans	25,694		10,417		(5,702	)	1,068	19,911
Commercial loans	5,730		(2,912	)	(2,053	)	373	10,322
Total Commercial Banking	31,424		7,505		(7,755	)	1,441	30,233
Total originated loans	51,473		17,395		(21,007	)	4,513	50,572
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(38	)	(94	)	103	131
Home equity loans	408		85		(578	)	139	762
Other consumer loans	444		(363	)	(209	)	126	890
Total Personal Banking	954		(316	)	(881	)	368	1,783
Commercial Banking:
Commercial real estate loans	2,876		(688	)	(147	)	162	3,549
Commercial loans	672		149		(448	)	80	891
Total Commercial Banking	3,548		(539	)	(595	)	242	4,440
Total acquired loans	4,502		(855	)	(1,476	)	610	6,223
Total	$	55,975	16,540		(22,483	)	5,123	56,795

20

The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance December 31, 2016
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(278	)	(678	)	286	4,656
Home equity loans	3,295		503		(803	)	109	3,486
Consumer finance loans	4,876		6,610		(5,469	)	290	3,445
Other consumer loans	7,383		9,741		(7,912	)	1,025	4,529
Total Personal Banking	19,540		16,576		(14,862	)	1,710	16,116
Commercial Banking:
Commercial real estate loans	20,174		(3,988	)	(498	)	993	23,667
Commercial loans	11,131		(3,517	)	(1,858	)	996	15,510
Total Commercial Banking	31,305		(7,505	)	(2,356	)	1,989	39,177
Total originated loans	50,845		9,071		(17,218	)	3,699	55,293
Acquired loans:
Personal Banking:
Residential mortgage loans	77		130		(199	)	75	71
Home equity loans	748		512		(1,063	)	252	1,047
Other consumer loans	594		405		(689	)	225	653
Total Personal Banking	1,419		1,047		(1,951	)	552	1,771
Commercial Banking:
Commercial real estate loans	3,301		1,832		(2,206	)	667	3,008
Commercial loans	1,362		1,276		(847	)	66	867
Total Commercial Banking	4,663		3,108		(3,053	)	733	3,875
Total acquired loans	6,082		4,155		(5,004	)	1,285	5,646
Total	$	56,927	13,226		(22,222	)	4,984	60,939

21

The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at September 30, 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	$	2,846,834	4,246	14,585	—	7,668	778	—
Home equity loans	1,272,345		3,642	7,085	72	2,061	497	4
Consumer finance loans	5,888		1,650	39	—	—	—	—
Consumer loans	770,161		11,465	4,307	123	—	—	—
Total Personal Banking	4,895,228		21,003	26,016	195	9,729	1,275	4
Commercial Banking:
Commercial real estate loans	2,518,066		28,570	43,023	—	15,667	1,516	208
Commercial loans	582,768		6,402	5,188	—	3,751	276	209
Total Commercial Banking	3,100,834		34,972	48,211	—	19,418	1,792	417
Total	$	7,996,062	55,975	74,227	195	29,147	3,067	421

(1) Includes $9.8 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, 2017 (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	$	2,776,203	3,955	14,791	—	8,000	815	—
Home equity loans	1,310,355		4,834	8,907	120	1,716	462	4
Consumer finance loans	18,619		3,968	199	3	—	—	—
Consumer loans	652,770		9,365	4,673	379	—	—	—
Total Personal Banking	4,757,947		22,122	28,570	502	9,716	1,277	4
Commercial Banking:
Commercial real estate loans	2,454,726		23,460	28,473	—	15,691	1,125	235
Commercial loans	580,736		11,213	7,412	—	6,697	742	8
Total Commercial Banking	3,035,462		34,673	35,885	—	22,388	1,867	243
Total	$	7,793,409	56,795	64,455	502	32,104	3,144	247

(1) Includes $12.3 million of nonaccrual TDRs.

(2) Represents loans 90 days or more past maturity and still accruing.

22

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 nine months endedSeptember 30, 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	$	13,154	1,431	505	6,349	21,439	20,499	659
Home equity loans	5,838		1,247	—	1,812	8,897	9,250	375
Consumer finance loan	39		—	—	—	39	25	4
Consumer loans	3,535		772	—	—	4,307	3,835	166
Total Personal Banking	22,566		3,450	505	8,161	34,682	33,609	1,204
Commercial Banking:
Commercial real estate loans	27,122		15,901	22,583	5,114	70,720	39,985	1,195
Commercial loans	2,714		2,474	223	2,305	7,716	8,910	392
Total Commercial Banking	29,836		18,375	22,806	7,419	78,436	48,895	1,587
Total	$	52,402	21,825	23,311	15,580	113,118	82,504	2,791

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, 2017 (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	$	13,509	1,282	—	6,814	21,605	21,531	892
Home equity loans	7,251		1,656	—	1,449	10,356	9,150	452
Consumer finance loans	199		—	—	—	199	379	20
Consumer loans	3,617		1,056	—	—	4,673	4,042	188
Total Personal Banking	24,576		3,994	—	8,263	36,833	35,102	1,552
Commercial Banking:
Commercial real estate loans	15,361		13,112	4,431	4,123	37,027	49,981	1,758
Commercial loans	3,140		4,272	906	2,447	10,765	12,110	672
Total Commercial Banking	18,501		17,384	5,337	6,570	47,792	62,091	2,430
Total	$	43,077	21,378	5,337	14,833	84,625	97,193	3,982

At September 30, 2018, 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.

23

The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at September 30, 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	$	2,838,600	8,234	8,234	795	—
Home equity loans	1,270,284		2,061	2,061	497	—
Consumer finance loans	5,888		—	—	—	—
Consumer loans	770,125		36	36	7	—
Total Personal Banking	4,884,897		10,331	10,331	1,299	—
Commercial Banking:
Commercial real estate loans	2,462,663		55,403	27,924	2,877	27,479
Commercial loans	577,023		5,745	4,328	475	1,417
Total Commercial Banking	3,039,686		61,148	32,252	3,352	28,896
Total	$	7,924,583	71,479	42,583	4,651	28,896

The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2017 (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	$	2,767,635	8,568	8,568	816	—
Home equity loans	1,308,639		1,716	1,716	461	—
Consumer finance loans	18,619		—	—	—	—
Consumer loans	652,685		85	85	25	—
Total Personal Banking	4,747,578		10,369	10,369	1,302	—
Commercial Banking:
Commercial real estate loans	2,433,755		20,971	18,470	1,859	2,501
Commercial loans	571,412		9,324	8,572	829	752
Total Commercial Banking	3,005,167		30,295	27,042	2,688	3,253
Total	$	7,752,745	40,664	37,411	3,990	3,253

24

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 premium or discount), 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 table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the quarter ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	30,662		203	$	41,860
New TDRs	7	647			6	546
Re-modified TDRs	3	306			2	265
Net paydowns		(1,215		)		(987		)
Charge-offs:
Residential mortgage loans	—	—			—	—
Home equity loans	—	—			—	—
Commercial real estate loans	1	(91		)	2	(2,498		)
Commercial loans	5	(619		)	—	—
Paid-off loans:
Residential mortgage loans	2	(2		)	—	—
Home equity loans	2	(12		)	3	(30		)
Commercial real estate loans	2	(360		)	1	(564		)
Commercial loans	3	(169		)	2	(123		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

25

The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the nine months ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	32,104		225	$	42,926
New TDRs	26	6,443			13	4,685
Re-modified TDRs	3	306			3	710
Net paydowns		(3,037		)		(3,668		)
Charge-offs:
Residential mortgage loans	1	(135		)	—	—
Home equity loans	—	—			—	—
Commercial real estate loans	2	(294		)	2	(2,498		)
Commercial loans	6	(1,340		)	6	(259		)
Paid-off loans:
Residential mortgage loans	4	(257		)	—	—
Home equity loans	4	(59		)	8	(62		)
Commercial real estate loans	9	(2,183		)	11	(1,109		)
Commercial loans	8	(2,401		)	10	(2,256		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

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 (dollars in thousands):

	For the quarter ended September 30, 2018					For the nine months ended September 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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	342	342	35	6	$	616	612	62
Home equity loans	4	194		193	47	12	511		462	113
Total Personal Banking	6	536		535	82	18	1,127		1,074	175
Commercial Banking:
Commercial real estate loans	3	372		361	42	5	3,255		3,198	97
Commercial loans	1	45		45	5	6	2,367		1,484	21
Total Commercial Banking	4	417		406	47	11	5,622		4,682	118
Total	10	$	953	941	129	29	$	6,749	5,756	293

During the quarter and nine months ended September 30, 2018, no TDRs modified within the previous twelve months have subsequently defaulted.

26

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 (dollars in thousands):

	For the quarter ended September 30, 2017					For the nine months ended September 30, 2017
	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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	403	402	40	5	$	1,297	1,276	128
Home equity loans	2	122		119	30	2	122		119	30
Total Personal Banking	4	525		521	70	7	1,419		1,395	158
Commercial Banking:
Commercial real estate loans	2	114		116	13	6	3,600		3,282	285
Commercial loans	2	172		170	71	3	376		352	84
Total Commercial Banking	4	286		286	84	9	3,976		3,634	369
Total	8	$	811	807	154	16	$	5,395	5,029	527
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Personal Banking:
Residential mortgage loans	—	$	—	—	—	—	$	—	—	—
Home equity loans	—	—		—	—	—	—		—	—
Total Personal Banking	—	—		—	—	—	—		—	—
Commercial Banking:
Commercial real estate loans	1	90		90	11	1	90		90	11
Commercial loans	1	150		150	70	1	150		150	70
Total Commercial Banking	2	240		240	81	2	240		240	81
Total	2	$	240	240	81	2	$	240	240	81

The following table provides information as of September 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 September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	—	—	342		342
Home equity loans	4	193		—	—		193
Total Personal Banking	6	193		—	342	—	535
Commercial Banking:
Commercial real estate loans	3	—		—	361		361
Commercial loans	1	—		—	45		45
Total Commercial Banking	4	—		—	406	—	406
Total	10	$	193	—	748	—	941

27

The following table provides information as of September 30, 2017 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 September 30, 2017 (dollars in thousands): 

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	250	—	—	152	402
Home equity loans	2	119		—	—	—	119
Total Personal Banking	4	369		—	—	152	521
Commercial Banking:
Commercial real estate loans	2	—		—	116	—	116
Commercial loans	2	—		—	170	—	170
Total Commercial Banking	4	—		—	286	—	286
Total	8	$	369	—	286	152	807

The following table provides information as of September 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 nine months ended September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	6	$	7	—	519	86	612
Home equity loans	12	222		—	47	193	462
Total Personal Banking	18	229		—	566	279	1,074
Commercial Banking:
Commercial real estate loans	5	—		482	361	2,355	3,198
Commercial loans	6	—		—	183	1,301	1,484
Total Commercial Banking	11	—		482	544	3,656	4,682
Total	29	$	229	482	1,110	3,935	5,756

The following table provides information as of September 30, 2017 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2017 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	5	$	360	—	—	916	1,276
Home equity loans	2	119		—	—	—	119
Total Personal Banking	7	479		—	—	916	1,395
Commercial Banking:
Commercial real estate loans	6	—		2,710	572	—	3,282
Commercial loans	3	—		—	352	—	352
Total Commercial Banking	9	—		2,710	924	—	3,634
Total	16	$	479	2,710	924	916	5,029

28

During the nine months ended September 30, 2018, three commercial banking TDRs were re-modified. During the nine months ended September 30, 2017, three personal banking TDRs were re-modified.

The following table provides information related to loan payment delinquencies at September 30, 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 greater delinquent and accruing (1)
Originated loans:
Personal Banking:
Residential mortgage loans	$	1,404	4,392	11,695	17,491	2,731,521	2,749,012	—
Home equity loans	4,622		2,118	5,013	11,753	1,036,620	1,048,373	—
Consumer finance loans	632		234	39	905	4,983	5,888	—
Consumer loans	7,893		3,032	3,166	14,091	688,850	702,941	—
Total Personal Banking	14,551		9,776	19,913	44,240	4,461,974	4,506,214	—
Commercial Banking:
Commercial real estate loans	2,329		5,370	21,771	29,470	2,247,959	2,277,429	—
Commercial loans	340		807	2,112	3,259	529,505	532,764	—
Total Commercial Banking	2,669		6,177	23,883	32,729	2,777,464	2,810,193	—
Total originated loans	17,220		15,953	43,796	76,969	7,239,438	7,316,407	—
Acquired loans:
Personal Banking:
Residential mortgage loans	96		312	1,788	2,196	95,626	97,822	329
Home equity loans	1,051		418	825	2,294	221,678	223,972	—
Consumer loans	515		219	375	1,109	66,111	67,220	6
Total Personal Banking	1,662		949	2,988	5,599	383,415	389,014	335
Commercial Banking:
Commercial real estate loans	3,057		1,308	5,457	9,822	230,815	240,637	106
Commercial loans	282		297	602	1,181	48,823	50,004	—
Total Commercial Banking	3,339		1,605	6,059	11,003	279,638	290,641	106
Total acquired loans	5,001		2,554	9,047	16,602	663,053	679,655	441
Total loans	$	22,221	18,507	52,843	93,571	7,902,491	7,996,062	441

(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.

29

The following table provides information related to loan payment delinquencies at December 31, 2017 (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	$	23,786	6,030	12,613	42,429	2,619,951	2,662,380	—
Home equity loans	6,094		2,333	6,043	14,470	1,037,088	1,051,558	—
Consumer finance loans	2,128		1,113	199	3,440	15,179	18,619	—
Consumer loans	9,762		2,834	3,274	15,870	537,496	553,366	—
Total Personal Banking	41,770		12,310	22,129	76,209	4,209,714	4,285,923	—
Commercial Banking:
Commercial real estate loans	5,520		2,133	10,629	18,282	2,142,930	2,161,212	—
Commercial loans	1,469		204	2,806	4,479	516,719	521,198	—
Total Commercial Banking	6,989		2,337	13,435	22,761	2,659,649	2,682,410	—
Total originated loan	48,759		14,647	35,564	98,970	6,869,363	6,968,333	—
Acquired loans:
Personal Banking:
Residential mortgage loans	1,998		205	1,277	3,480	110,343	113,823	381
Home equity loans	1,367		538	1,306	3,211	255,586	258,797	98
Consumer loans	1,150		517	353	2,020	97,384	99,404	10
Total Personal Banking	4,515		1,260	2,936	8,711	463,313	472,024	489
Commercial Banking:
Commercial real estate loans	2,795		406	5,655	8,856	284,658	293,514	923
Commercial loans	396		237	334	967	58,571	59,538	—
Total Commercial Banking	3,191		643	5,989	9,823	343,229	353,052	923
Total acquired loan	7,706		1,903	8,925	18,534	806,542	825,076	1,412
Total	$	56,465	16,550	44,489	117,504	7,675,905	7,793,409	1,412

(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.

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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 quarter ended September 30, 2018 (in thousands): 

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,739,243	—	9,769	—	—	2,749,012
Home equity loans	1,042,627		—	5,746	—	—	1,048,373
Consumer finance loans	5,849		—	39	—	—	5,888
Consumer loans	699,033		—	3,908	—	—	702,941
Total Personal Banking	4,486,752		—	19,462	—	—	4,506,214
Commercial Banking:
Commercial real estate loans	2,083,302		47,983	146,144	—	—	2,277,429
Commercial loans	487,143		21,120	24,501	—	—	532,764
Total Commercial Banking	2,570,445		69,103	170,645	—	—	2,810,193
Total originated loans	7,057,197		69,103	190,107	—	—	7,316,407
Acquired loans:
Personal Banking:
Residential mortgage loans	96,563		—	1,259	—	—	97,822
Home equity loans	222,610		—	1,362	—	—	223,972
Consumer loans	66,673		—	547	—	—	67,220
Total Personal Banking	385,846		—	3,168	—	—	389,014
Commercial Banking:
Commercial real estate loans	199,850		5,546	35,241	—	—	240,637
Commercial loans	39,441		3,640	6,923	—	—	50,004
Total Commercial Banking	239,291		9,186	42,164	—	—	290,641
Total acquired loans	625,137		9,186	45,332	—	—	679,655
Total loans	$	7,682,334	78,289	235,439	—	—	7,996,062

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The following table sets forth information about credit quality indicators, which were updated during the year ended December 31, 2017 (in thousands):

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,645,475	—	16,905	—	—	2,662,380
Home equity loans	1,042,965		—	8,593	—	—	1,051,558
Consumer finance loans	18,420		—	199	—	—	18,619
Consumer loans	549,550		—	3,816	—	—	553,366
Total Personal Banking	4,256,410		—	29,513	—	—	4,285,923
Commercial Banking:
Commercial real estate loans	1,964,565		78,699	117,948	—	—	2,161,212
Commercial loans	461,962		15,510	43,726	—	—	521,198
Total Commercial Banking	2,426,527		94,209	161,674	—	—	2,682,410
Total originated loans	6,682,937		94,209	191,187	—	—	6,968,333
Acquired loans:
Personal Banking:
Residential mortgage loans	112,990		—	833	—	—	113,823
Home equity loans	257,312		—	1,485	—	—	258,797
Consumer loans	98,659		—	745	—	—	99,404
Total Personal Banking	468,961		—	3,063	—	—	472,024
Commercial Banking:
Commercial real estate loans	251,761		4,838	36,915	—	—	293,514
Commercial loans	49,073		3,787	6,678	—	—	59,538
Total Commercial Banking	300,834		8,625	43,593	—	—	353,052
Total acquired loans	769,795		8,625	46,656	—	—	825,076
Total	$	7,452,732	102,834	237,843	—	—	7,793,409

(4) Goodwill and Other Intangible Assets

The following table provides information for intangible assets subject to amortization at the dates indicated (in thousands):

	September 30, 2018			December 31, 2017
Amortizable intangible assets:
Core deposit intangibles — gross	$	63,685		63,685
Less: accumulated amortization	(43,886		)	(40,029	)
Core deposit intangibles — net	19,799			23,656
Customer and Contract intangible assets — gross	10,474			10,474
Less: accumulated amortization	(9,106		)	(8,461	)
Customer and Contract intangible assets — net	$	1,368		2,013

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The following table shows the actual aggregate amortization expense for the quarters ended September 30, 2018 and 2017, as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for the current fiscal year and each of the five succeeding fiscal years (in thousands): 

For the quarter ended September 30, 2018	$	1,462
For the quarter ended September 30, 2017	1,691
For the nine months ended September 30, 2018	4,502
For the nine months ended September 30, 2017	5,189
For the year ending December 31, 2018	5,848
For the year ending December 31, 2019	4,933
For the year ending December 31, 2020	4,017
For the year ending December 31, 2021	3,188
For the year ending December 31, 2022	2,456
For the year ending December 31, 2023	1,847

The following table provides information for the changes in the carrying amount of goodwill (in thousands):

	Total
Balance at December 31, 2016	$	307,420
Goodwill from acquisition	—
Balance at December 31, 2017	307,420
Goodwill from acquisition	—
Balance at September 30, 2018	$	307,420

We performed our annual goodwill impairment test as of June 30, 2018 using Accounting Standard Codification 350, ("Step 0"), as updated by ASU 2017-04 and concluded that goodwill was not impaired. As of September 30, 2018, there were no changes in our operations that would cause us to update that goodwill impairment test.

(5)Borrowed Funds

Borrowings

Borrowings from the Federal Home Loan Bank of Pittsburgh ("FHLB"), if any, are secured by our residential first mortgage and other qualifying loans. Certain of these borrowings are subject to restrictions or penalties in the event of prepayment.

The revolving line of credit with the FHLB carries a commitment of $150.0 million. The rate is adjusted daily by the FHLB, and any borrowings on this line may be repaid at any time without penalty. At September 30, 2018 and December 31, 2017 the balance of the revolving line of credit was $85.2 million and $0, respectively.

At September 30, 2018 and December 31, 2017 collateralized borrowings, due within one year, were $91.8 million, and $108.2 million, respectively. These borrowings are collateralized by cash or various securities held in safekeeping by the FHLB.

Trust Preferred Securities

We have 3 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

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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 September 30, 2018 was 3.78%. 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 September 30, 2018 was 3.71%. 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 September 30, 2018 was 3.81%.

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 5 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.

(6) Guarantees

We issue standby letters of credit in the normal course of business.  Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party.  Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party.  We are required to perform under a standby letter of credit when drawn upon by the guaranteed third party in the case of nonperformance by our customer.  The credit risk associated with standby letters of credit is essentially the same as that involved in extending loans to customers and is subject to normal loan underwriting procedures. Collateral may be obtained based on management’s credit assessment of the customer.  At September 30, 2018, the maximum potential amount of future payments we could be required to make under these non-recourse standby letters of credit was $33.8 million, of which $27.3 million is fully collateralized.  At September 30, 2018, we had a liability, which represents deferred income, of $133,000 related to the standby letters of credit. 

(7) 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 September 30, 2018 and 2017, 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 $18.01 and $16.26, respectively. All stock options outstanding during the nine months ended September 30, 2018 and 2017, 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 $17.30 and $16.58, respectively.

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The computation of basic and diluted earnings per share follows (in thousands, except share data and per share amounts): 

	Quarter ended September 30,			Nine months ended September 30,
	2018		2017	2018	2017
Reported net income	$	27,740	23,591	79,024	72,319
Weighted average common shares outstanding	102,334,954		101,163,534	101,937,338	100,921,322
Dilutive potential shares due to effect of stock options	1,607,741		1,400,942	1,566,731	1,617,020
Total weighted average common shares and dilutive potential shares	103,942,695		102,564,476	103,504,069	102,538,342
Basic earnings per share:	$	0.27	0.23	0.78	0.72
Diluted earnings per share:	$	0.27	0.23	0.76	0.71

(8) Pension and Other Post-retirement Benefits

The following table sets forth the net periodic costs for the defined benefit pension plans and post retirement healthcare plans for the periods indicated (in thousands):

	Quarter ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	1,716		1,537		—	—
Interest cost	1,678			1,719		14	17
Expected return on plan assets	(2,992		)	(2,628	)	—	—
Amortization of prior service cost	(581		)	(580	)	—	—
Amortization of the net loss	872			928		24	27
Net periodic cost	$	693		976		38	44

	Nine months ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	5,148		4,612		—	—
Interest cost	5,034			5,159		41	51
Expected return on plan assets	(8,976		)	(7,884	)	—	—
Amortization of prior service cost	(1,742		)	(1,742	)	—	—
Amortization of the net loss	2,617			2,783		73	81
Net periodic cost	$	2,081		2,928		114	132

We anticipate making a contribution to our defined benefit pension plan of $4.0 million to $6.0 million during the year ending December 31, 2018.

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(9) 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 on hand, interest-earning deposits in other institutions, federal funds sold and other short term investments, 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.

Equity securities - available for sale - Publicly traded securities valued using quoted market prices are classified as Level 1.  We consider the financial condition of the issuer to determine if the securities have indicators of impairment.

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.

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Loans Held for Sale

The estimated fair value of loans held for sale is based on market bids obtained from potential buyers.

Loans Held for Investment

With the adoption of ASU 2016-01 on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the guidance, which was applied on a prospective basis resulting in prior-periods no longer being comparable.

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.

Federal Home Loan Bank (“FHLB”) Stock

Due to the restrictions placed on transferability, FHLB stock is classified as Level 3.

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 ("swaps")

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 September 30, 2018 and December 31, 2017, there was no significant unrealized appreciation or depreciation on these financial instruments.

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The following table sets forth the carrying amount and estimated fair value of our financial instruments included in the consolidated statement of financial condition at September 30, 2018 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	73,946	73,946	73,946	—	—
Securities available-for-sale	811,556		811,556	—	811,556	—
Securities held-to-maturity	24,222		23,534	—	23,534	—
Loans receivable, net	7,940,087		7,721,559	—	—	7,721,559
Accrued interest receivable	25,798		25,798	25,798	—	—
Interest rate swaps	4,386		4,386	—	4,386	—
FHLB Stock	15,452		15,452	—	—	15,452
Total financial assets	$	8,895,447	8,676,231	99,744	839,476	7,737,011
Financial liabilities:
Savings and checking deposits	$	6,550,748	6,550,748	6,550,748	—	—
Time deposits	1,403,205		1,431,500	—	—	1,431,500
Borrowed funds	179,117		179,111	179,111	—	—
Junior subordinated debentures	111,213		104,609	—	—	104,609
Interest rate swaps	4,479		4,479	—	4,479	—
Accrued interest payable	627		627	627	—	—
Total financial liabilities	$	8,249,389	8,271,074	6,730,486	4,479	1,536,109

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, 2017 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	77,710	77,710	77,710	—	—
Securities available-for-sale	792,535		792,535	574	791,961	—
Securities held-to-maturity	29,678		29,667	—	29,667	—
Loans receivable, net	7,736,614		7,762,562	3,128	—	7,759,434
Accrued Interest Receivable	23,352		23,352	23,352	—	—
Interest rate swaps	214		214	—	214	—
FHLB Stock	11,733		11,733	—	—	11,733
Total financial assets	$	8,671,836	8,697,773	104,764	821,842	7,771,167
Financial liabilities:
Savings and checking accounts	$	6,414,366	6,414,366	6,414,366	—	—
Time deposits	1,412,623		1,433,380	—	—	1,433,380
Borrowed funds	108,238		108,238	108,238	—	—
Junior subordinated debentures	111,213		110,954	—	—	110,954
Interest rate swaps	1,278		1,278	—	1,278	—
Foreign exchange swaps	61		61	—	61	—
Accrued interest payable	460		460	460	—	—
Total financial liabilities	$	8,048,239	8,068,737	6,523,064	1,339	1,544,334

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Fair value estimates are made at a point-in-time, based on relevant market data and information about the instrument. The methods and assumptions detailed above were used in estimating the fair value of financial instruments at both September 30, 2018 and December 31, 2017.  There were no transfers of financial instruments between Level 1 and Level 2 during the quarter ended September 30, 2018.

The following table represents assets and liabilities measured at fair value on a recurring basis at September 30, 2018 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Debt securities:
U.S. government and agencies	$	—	14,695	—	14,695
Government sponsored enterprises	—		186,445	—	186,445
States and political subdivisions	—		24,744	—	24,744
Corporate	—		912	—	912
Total debt securities	—		226,796	—	226,796
Residential mortgage-backed securities:
GNMA	—		27,820	—	27,820
FNMA	—		71,251	—	71,251
FHLMC	—		53,907	—	53,907
Non-agency	—		535	—	535
Collateralized mortgage obligations:
GNMA	—		53,969	—	53,969
FNMA	—		205,066	—	205,066
FHLMC	—		172,212	—	172,212
Non-agency	—		—	—	—
Total mortgage-backed securities	—		584,760	—	584,760
Interest rate swaps	—		4,386	—	4,386
Total Assets	$	—	815,942	—	815,942
Interest rate swaps	$	—	4,479	—	4,479
Total Liabilities	$	—	4,479	—	4,479

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The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2017 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Equity securities	$	574	—	—	574
Debt securities:
U.S. government and agencies	—		1	—	1
Government sponsored enterprises	—		209,269	—	209,269
States and political subdivisions	—		51,056	—	51,056
Corporate	—		909	—	909
Total debt securities	—		261,235	—	261,235
Residential mortgage-backed securities:
GNMA	—		29,695	—	29,695
FNMA	—		82,969	—	82,969
FHLMC	—		64,021	—	64,021
Non-agency	—		555	—	555
Collateralized mortgage obligations:
GNMA	—		4,769	—	4,769
FNMA	—		191,512	—	191,512
FHLMC	—		157,190	—	157,190
Non-agency	—		15	—	15
Total mortgage-backed securities	—		530,726	—	530,726
Interest rate swaps	—		214	—	214
Total Assets	$	574	792,175	—	792,749
Interest rate swaps	$	—	1,278	—	1,278
Foreign exchange swaps	—		61	—	61
Total Liabilities	$	—	1,339	—	1,339

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The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the periods indicated (in thousands): 

	Quarter ended			Nine months ended
	September 30, 2018		September 30, 2017	September 30, 2018	September 30, 2017
Beginning balance January 1,	$	—	10,638	—	9,366
Total net realized investment gains/ (losses) and net change in unrealized appreciation/ (depreciation):
Included in net income as OTTI	—		—	—	—
Included in other comprehensive income	—		21	—	1,293
Purchases	—		—	—	—
Sales	—		—	—	—
Transfers in to Level 3	—		—	—	—
Transfers out of Level 3	—		—	—	—
Ending balance September 30,	$	—	10,659	—	10,659

Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans held

for sale, loans measured for impairment, real estate owned, and 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 September 30, 2018 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	37,932	37,932
Real estate owned	—		—	2,486	2,486
Total assets	$	—	—	40,418	40,418

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, 2017 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	33,421	33,421
Real estate owned	—		—	5,666	5,666
Total assets	$	—	—	39,087	39,087

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 2017 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.

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The table presents additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at September 30, 2018 (dollar amounts in thousands): 

	Fair value	Valuation techniques	Significant unobservable inputs	Range (weighted average)
Loans measured for impairment	37,932	Appraisal value (1)	Estimated cost to sell	10.0%
		Discounted cash flow	Discount rate	4.25% to 10.0% (7.50%)
Real estate owned	2,486	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.

(10) 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

We are currently a counterparty to one interest rate swap agreement ("swap") which is designated as a cash flow hedge.  The swap is intended to protect against the variability of cash flows associated with Northwest Bancorp Capital Trust IV and modifies its re-pricing characteristics, wherein for 10 years expiring in December 2018, the Company receives interest of three-month LIBOR from a counterparty and pays a fixed rate of 4.09% to the same counterparty calculated on a notional amount of $25.0 million. The swap agreement was entered into with a counterparty that met our credit standards and the agreement contains collateral provisions protecting the at-risk party.  We believe that the credit risk inherent in the contract is not significant. At September 30, 2018, $255,000 of cash was pledged as collateral to the counterparty.

This cash flow hedge is recorded within other liabilities on the consolidated statement of financial condition at their estimated fair value. At September 30, 2018, the fair value of the swap agreements was $(93,000). There was no material hedge ineffectiveness for the swap discussed above.

Derivatives Not Designated as Hedging Instruments

In addition to our derivatives designated in hedge relationships, 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.

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The following table presents information regarding our derivative financial instruments for the periods indicated:

	Asset Derivatives			Liability Derivatives
	Notional Amount		Fair Value	Notional Amount	Fair Value
At September 30, 2018
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	25,000	93
Derivatives not designed as hedging instruments:
Interest rate swap agreements	209,353		4,386	209,353	4,386
Total derivatives	$	209,353	4,386	234,353	4,479
At December 31, 2017
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	50,000	1,064
Derivatives not designed as hedging instruments:
Interest rate swap agreements	92,631		214	92,631	214
Foreign exchange swap agreements	—		—	12,344	61
Total derivatives	$	92,631	214	154,975	1,339

The following table presents income or expense recognized on derivatives for the periods indicated:

	For the quarter ended September 30,		For the nine months ended September 30,
	2018	2017	2018		2017
Hedging interest rate derivatives:
Increase in interest expense	257	393	857		1,216
Non-hedging swap derivatives:
Increase/ (decrease) in other income	—	99	(288	)	333

(11) Legal Proceedings

We establish accruals for legal proceedings when information related to the loss contingencies represented by those matters indicates both that a loss is probable and that the amount of loss can be reasonably estimated. As of September 30, 2018 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.

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(12)    Changes in Accumulated Other Comprehensive Income/ (Loss)

The following table shows the changes in accumulated other comprehensive income by component for the periods indicated (in thousands): 

	For the quarter ended September 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 June 30, 2018	$	(10,693	)	(266	)	(32,134	)	(43,093	)
Other comprehensive income/ (loss) before reclassification adjustments	(1,970		)	192		—		(1,778	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(44		)	—		226		182
Net other comprehensive income/ (loss)	(2,014		)	192		226		(1,596	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the quarter ended September 30, 2017
	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 June 30, 2017	$	2,276		(1,257	)	(26,167	)	(25,148	)
Other comprehensive income before reclassification adjustments	(264		)	258		—		(6	)
Amounts reclassified from accumulated other comprehensive income (3), (4)	(674		)	—		221		(453	)
Net other comprehensive income	(938		)	258		221		(459	)
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gain on securities (gain on sales of investments, net) of $61, net of tax (income tax expense) of $(17).

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $581 and amortization of net loss (compensation and employee benefits) of $(897), net of tax (income tax expense) of $90.

(3) Consists of realized gain on securities (gain on sales of investments, net) of $1,043, net of tax (income tax expense) of $(369).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $(954), net of tax (income tax expense) of $153. 

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	For the nine months ended September 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	(7,169		)	766		—		(6,403	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(138		)	—		678		540
Net other comprehensive income/ (loss)	(7,307		)	766		678		(5,863	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the nine months ended September 30, 2017
	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, 2016	$	395		(1,778	)	(26,608	)	(27,991	)
Other comprehensive income before reclassification adjustments	1,684			779		—		2,463
Amounts reclassified from accumulated other comprehensive income (3), (4)	(741		)	—		662		(79	)
Net other comprehensive income	943			779		662		2,384
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gains on securities (loss on sales of investments, net) of $192, net of tax (income tax expense) of $54.

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742and amortization of net loss (compensation and employee benefits) of $(2,691), net of tax (income tax expense) of $271.

(3) Consists of realized gains on securities (gain on sales of investments, net) of $1,157, net of tax (income tax expense) of $(416).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742 and amortization of net loss (compensation and employee benefits) of $(2,864), net of tax (income tax expense) of $460.

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ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements:

In addition to historical information, this document may contain certain forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements contained herein are subject to certain risks and uncertainties that could cause actual results to differ materially from those expressed or implied in the forward-looking statements.  Readers are cautioned not to place undue reliance on these forward-looking statements, as they reflect management’s analysis only as of the date of this report. We have no obligation to revise or update these forward-looking statements to reflect events or circumstances that arise after the date of this report.

Important factors that might cause such a difference include, but are not limited to:

•     changes in laws or government regulations or policies affecting financial institutions, including changes in regulatory

fees and capital requirements;

•     general economic conditions, either nationally or in our market areas, that are different than expected;

•     inflation and changes in the interest rate environment that reduce our margins or reduce the fair value of financial

instruments;

•     adverse changes in the securities and credit markets;

•     cyber-security concerns, including an interruption or breach in the security of our website or other information

systems;

•     technological changes that may be more difficult or expensive than expected;

•     the ability of third-party providers to perform their obligations to us;

•     competition among depository and other financial institutions;

•    our ability to enter new markets successfully and capitalize on growth opportunities;

•     managing our internal growth and our ability to successfully integrate acquired entities, businesses or branch offices;

•     changes in consumer spending, borrowing and savings habits;

•     our ability to continue to increase and manage our commercial and personal loans;

•     possible impairments of securities held by us, including those issued by government entities and government

sponsored enterprises;

•     the impact of the economy on our loan portfolio (including cash flow and collateral values), investment

portfolio, customers and capital market activities;

•    our ability to receive regulatory approvals for proposed transactions or new lines of business;

•     changes in the financial performance and/ or condition of our borrowers; and

•     the effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as

the Securities and Exchange Commission, the Public Company Accounting Oversight Board, the Financial

Accounting Standards Board and other accounting standard setters.

Overview of Critical Accounting Policies Involving Estimates

Please refer to Note 1 of the Notes to Consolidated Financial Statements in Item 8 of Part II of our 2017 Annual Report on Form 10-K.

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Comparison of Financial Condition

Total assets at September 30, 2018 were $9.575 billion, an increase of $211.4 million, or 2.3%, from $9.364 billion at December 31, 2017.  This increase in assets was due primarily to a $203.5 million, or 2.6%, increase in net loans receivable and a $9.8 million, or 1.1%, increase in cash and investments. This increase was funded by a $127.0 million, or 1.6%, increase in deposits and a $70.9 million, or 65.5%, increase in borrowed funds.

Total loans receivable increased by $202.7 million, or 2.6%, to $7.996 billion at September 30, 2018, from $7.793 billion at December 31, 2017 due primarily to an increase in our personal banking loan portfolio of $137.3 million, or 2.9%, to $4.895 billion at September 30, 2018 from $4.758 billion at December 31, 2017. This increase was due primarily to lower sales of residential mortgage loans into the secondary market and our continued emphasis on indirect retail lending through dealer channels. Additionally, our commercial banking loan portfolio increased by $65.4 million, or 2.2%, to $3.101 billion at September 30, 2018 from $3.035 billion at December 31, 2017, as we continue to emphasize the expansion of commercial relationships.

     Total deposits increased by $127.0 million, or 1.6%, to $7.954 billion at September 30, 2018 from $7.827 billion at December 31, 2017. Noninterest-bearing demand deposits increased by $113.8 million, or 7.1%, to $1.724 billion at September 30, 2018 from $1.610 billion at December 31, 2017. In addition, interest-bearing demand deposits increased by $56.4 million, or 3.9%, to $1.499 billion at September 30, 2018 from $1.443 billion at December 31, 2017. These increases are due primarily to our continued efforts to attract low cost accounts to whom we can also cross-sell other products and services. Partially offsetting these increases was a decrease in money market demand accounts of $30.6 million, or 1.8%, to $1.677 billion at September 30, 2018 from $1.707 billion at December 31, 2017. Savings deposits decreased by $3.2 million, or 0.2%, to $1.650 billion at September 30, 2018 from $1.654 billion at December 31, 2017. Additionally, time deposits decreased by $9.4 million, or 0.7%, to $1.403 billion at September 30, 2018 from $1.413 billion at December 31, 2017. As a result of recent increases in market interest rates competition has intensified for interest rate sensitive customers.

Total shareholders’ equity at September 30, 2018 was $1.241 billion, or $12.01 per share, an increase of $33.0 million, or 2.7%, from $1.208 billion, or $11.79 per share, at December 31, 2017.  This increase in equity was primarily the result of net income of $79.0 million for the nine months ended September 30, 2018. Partially offsetting this increase was the payment of cash dividends of $52.4 million during the nine months ended September 30, 2018.

Regulatory Capital

Financial institutions and their holding companies are subject to various regulatory capital requirements. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by the regulators that, if undertaken, could have a direct material effect on a company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, financial institutions must meet specific capital guidelines that involve quantitative measures of its assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting guidelines. Capital amounts and classifications are also subject to qualitative judgments made by the regulators about components, risk-weighting and other factors.

In July 2013, the FDIC and the other federal regulatory agencies issued a final rule that revised their leverage and risk-based capital requirements and the method for calculating risk-weighted assets to make them consistent with agreements that were reached by the Basel Committee on Banking Supervision and certain provisions of the Dodd-Frank Act. The rule limits an organization’s capital distributions and certain discretionary bonus payments if the organization does not hold a “capital conservation buffer” consisting of 2.5% of Total, Tier 1 and Common Equity Tier 1 ("CET1") capital to risk-weighted assets in addition to the amount necessary to meet its minimum risk-based capital requirements.

The capital conservation buffer requirement is being phased in beginning on January 1, 2016 and ending on January 1,

2019, when the full capital conservation buffer requirement will be effective.

Quantitative measures, established by regulation to ensure capital adequacy, require financial institutions to maintain minimum amounts and ratios (set forth in the table below) of Total, CET1 and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital to average assets (as defined). Capital ratios are presented in the tables below. Dollar amounts in the accompanying tables are in thousands.

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As a result of the recently enacted Economic Growth, Regulatory Relief, and Consumer Protection Act, the federal banking agencies are required to develop a “Community Bank Leverage Ratio” (the ratio of a bank’s tangible equity capital to average total consolidated assets) for financial institutions with assets of less than $10 billion.  A “qualifying community bank” that exceeds this ratio will be deemed to be in compliance with all other capital and leverage requirements, including the capital requirements to be considered “well capitalized” under Prompt Corrective Action statutes.  The federal banking agencies may consider a financial institution’s risk profile when evaluating whether it qualifies as a community bank for purposes of the capital ratio requirement. The federal banking agencies must set the minimum capital for the new Community Bank Leverage Ratio at not less than 8% and not more than 10%.  A financial institution can elect to be subject to this new definition.

	At September 30, 2018
					Minimum capital				Well capitalized
	Actual				requirements (1)				requirements
	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total capital (to risk weighted assets)
Northwest Bancshares, Inc.	$	1,180,181	15.961	%	$	730,192	9.875	%	$	739,435	10.000	%
Northwest Bank	1,109,432		15.015	%	729,648		9.875	%	738,884		10.000	%
Tier 1 capital (to risk weighted assets)
Northwest Bancshares, Inc.	1,124,206		15.204	%	582,305		7.875	%	591,548		8.000	%
Northwest Bank	1,053,457		14.257	%	581,871		7.875	%	591,108		8.000	%
CET1 capital (to risk weighted assets)
Northwest Bancshares, Inc.	1,016,331		13.745	%	471,389		6.375	%	480,632		6.500	%
Northwest Bank	1,053,457		14.257	%	471,039		6.375	%	480,275		6.500	%
Tier 1 capital (leverage) (to average assets)
Northwest Bancshares, Inc.	1,124,206		11.971	%	375,659		4.000	%	469,574		5.000	%
Northwest Bank	1,053,457		11.220	%	375,560		4.000	%	469,450		5.000	%

(1) Amounts and ratios include the 2018 capital conservation buffer of 1.875%, with the exception of Tier 1 capital to average assets (leverage ratio).

	At December 31, 2017
					Minimum capital				Well capitalized
	Actual				requirements (1)				requirements
	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total capital (to risk weighted assets)
Northwest Bancshares, Inc.	$	1,136,076	15.831	%	$	663,823	9.250	%	$	717,647	10.000	%
Northwest Bank	1,017,251		14.189	%	663,179		9.250	%	716,951		10.000	%
Tier I capital (to risk weighted assets)
Northwest Bancshares, Inc.	1,079,270		15.039	%	520,294		7.250	%	574,117		8.000	%
Northwest Bank	960,443		13.396	%	519,789		7.250	%	573,560		8.000	%
CET1 capital (to risk weighted assets)
Northwest Bancshares, Inc.	971,395		13.536	%	412,647		5.750	%	466,470		6.500	%
Northwest Bank	960,443		13.396	%	412,247		5.750	%	430,170		6.000	%
Tier I capital (leverage) (to average assets)
Northwest Bancshares, Inc.	1,079,270		11.676	%	369,735		4.000	%	462,169		5.000	%
Northwest Bank	960,443		10.400	%	369,482		4.000	%	461,853		5.000	%

(1) Amounts and ratios include the 2017 capital conservation buffer of 1.250%, with the exception of Tier 1 capital to average assets (leverage ratio).

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Liquidity

We are required to maintain a sufficient level of liquid assets, as determined by management and reviewed for adequacy by the FDIC and the Pennsylvania Department of Banking and Securities during their regular examinations. Northwest monitors its liquidity position primarily using the ratio of unencumbered available-for-sale liquid assets as a percentage of deposits and borrowings (“liquidity ratio”).  Northwest’s liquidity ratio at September 30, 2018 was 9.6%. We adjust liquidity levels in order to meet funding needs for deposit outflows, payment of real estate taxes and insurance on mortgage loan escrow accounts, repayment of borrowings and loan commitments. At September 30, 2018 Northwest had $3.072 billion of additional borrowing capacity available with the FHLB, including $150.0 million on an overnight line of credit, which had $64.8 million of availability, as well as $53.8 million of borrowing capacity available with the Federal Reserve Bank and $80.0 million with two correspondent banks.

Dividends

We paid $17.5 million and $16.3 million in cash dividends during the quarters ended September 30, 2018 and 2017, respectively.  The common stock dividend payout ratio (dividends declared per share divided by net income per diluted share) was 63.0% and 69.6% for the quarters ended September 30, 2018 and 2017, respectively, on dividends of $0.17 per share for the quarter ended September 30, 2018 and on dividends of $0.16 per share for the quarter ended September 30, 2017.We paid $52.4 million and $48.9 million in cash dividends during the nine months ended September 30, 2018 and 2017, respectively.  The common stock dividend payout ratio (dividends declared per share divided by net income per diluted share) was 67.1% and 67.6% for the nine months ended September 30, 2018 and 2017, respectively, on dividends of $0.51 per share for the nine months ended September 30, 2018 and on dividends of $0.48 per share for the nine months ended September 30, 2017.On October 16, 2018, theBoard of Directors declared a cash dividend of $0.17 per share payable on November 15, 2018 to shareholders of record as of November 1, 2018. This represents the 96th consecutive quarter we have paid a cash dividend.

Nonperforming Assets

The following table sets forth information with respect to nonperforming assets.  Nonaccrual loans are those loans on which the accrual of interest has ceased.  Generally, when a loan is 90 days past due, we fully reverse all accrued interest thereon and cease to accrue interest thereafter.  Exceptions are made for loans that have contractually matured, are in the process of being modified to extend the maturity date and are otherwise current as to principal and interest, and well secured loans that are in process of collection. Loans may also be placed on nonaccrual before they reach 90 days past due if conditions exist that call into question our ability to collect all contractual interest.  Other nonperforming assets represent property acquired through foreclosure or repossession. Foreclosed property is carried at the lower of its fair value less estimated costs to sell, or the principal balance of the related loan.

	September 30 2018			December 31, 2017
	(Dollars in thousands)
Loans 90 days or more past due
Residential mortgage loans	$	13,483		13,890
Home equity loans	5,910			7,469
Consumer legacy finance loans	39			202
Consumer loans	3,664			4,006
Commercial real estate loans	27,228			16,284
Commercial loans	2,714			3,140
Total loans 90 days or more past due	$	53,038		44,991
Total real estate owned (REO)	2,486			5,666
Total loans 90 days or more past due and REO	55,524			50,657
Total loans 90 days or more past due to net loans receivable	0.67		%	0.58	%
Total loans 90 days or more past due and REO to total assets	0.58		%	0.54	%
Nonperforming loans:
Nonaccrual loans - loans 90 days or more delinquent	52,402			43,077
Nonaccrual loans - loans less than 90 days delinquent	21,825			21,378
Loans 90 days or more past maturity and still accruing	195			502
Total nonperforming loans	74,422			64,957
Total nonperforming assets	$	76,908		70,623
Nonaccrual troubled debt restructured loans (1)	$	19,370		12,285
Accruing troubled debt restructured loans	9,777			19,819
Total troubled debt restructured loans	$	29,147		32,104

(1) Included in nonaccurual loans above.

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At September 30, 2018, 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 these loans that are 90 days or more delinquent, which total $441,000, to be nonaccrual or impaired and continue to recognize interest income on these loans, including the loans’ accretable discount.

A loan is considered to be impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement including both contractual principal and interest payments.  The amount of impairment is required to be measured using one of three methods: (1) the present value of expected future cash flows discounted at the loan’s effective interest rate; (2) the loan’s observable market price; or (3) the fair value of collateral if the loan is collateral dependent.  If the measure of the impaired loan is less than the recorded investment in the loan, a specific allowance is allocated for the impairment. Impaired loans at September 30, 2018 and December 31, 2017 were $113.1 million and $84.6 million, respectively.

Allowance for Loan Losses

Our Board of Directors has adopted an “Allowance for Loan and Lease Losses” (“ALL”) policy designed to provide management with a systematic methodology for determining and documenting the ALL each reporting period.  This methodology was developed to provide a consistent process and review procedure to ensure that the ALL is in conformity with GAAP, our policies and procedures and other supervisory and regulatory guidelines.

On an ongoing basis, the Credit Administration department, as well as loan officers, branch managers and department heads, review and monitor the loan portfolio for problem loans. This portfolio monitoring includes a review of the monthly delinquency reports as well as historical comparisons and trend analysis. Consumer and small business commercial loans are classified primarily by delinquency status. In addition, a meeting is held every quarter with each region to monitor the performance and status of loans on an internal watch list.  On an on-going basis the loan officer in conjunction with a portfolio manager grades or classifies problem loans or potential problem loans based upon their knowledge of the lending relationship and other information previously accumulated.  This rating is also reviewed independently by our Loan Review department on a periodic basis.  Our loan grading system for problem loans is consistent with industry regulatory guidelines which classifies loans as “substandard”, “doubtful” or “loss.”  Loans that do not expose us to risk sufficient to warrant classification in one of the previous categories, but which possess some weaknesses, are designated as “special mention”.  A “substandard” loan is any loan that is 90 days or more contractually delinquent or is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any.  Loans classified as “doubtful” have all the weaknesses inherent in those classified as “substandard” with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions or values, highly questionable and improbable.  Loans classified as “loss” are considered uncollectible so that their continuance as assets without the establishment of a specific loss allowance is not warranted.

Credit relationships that have been classified as substandard or doubtful and are greater than or equal to $1.0 million are reviewed by the Credit Administration department for possible impairment.  A loan is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement, including both contractual principal and interest payments.

If such an individual loan is deemed to be impaired, the Credit Administration department determines the proper measure of impairment for each loan based on one of three methods: (1) the present value of expected future cash flows discounted at the loan’s effective interest rate; (2) the loan’s observable market price; or (3) the fair value of the collateral if the loan is collateral dependent, less costs of sale or disposal.  If the measurement of the impaired loan is more or less than the recorded investment in the loan, the specific allowance associated with that individual loan is adjusted accordingly.

If a substandard or doubtful loan is not considered individually for impairment, it is grouped with other loans that possess common characteristics for impairment evaluation and analysis.  This segmentation is accomplished by grouping loans of similar product types, risk characteristics and industry concentration into homogeneous pools.  Historical loss ratios are analyzed and adjusted based on delinquency trends as well as the current economic, political, regulatory, and interest rate environment and used to estimate the current measure of impairment.

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The individual impairment measures along with the estimated loss for each homogeneous pool are consolidated into one summary document.   This summary schedule along with the support documentation used to establish this schedule is presented to management’s Allowance Committee on a quarterly basis.  The Allowance Committee reviews the processes and documentation presented, reviews the concentration of credit by industry and customer, lending products and activity, competition and collateral values, as well as economic conditions in general and in each of our market areas.  Based on this review and discussion, the appropriate amount of ALL is estimated and any adjustments to reconcile the actual ALL with this estimate are determined.  In addition, the Allowance Committee considers if any changes to the methodology are needed. The Allowance Committee also reviews and discusses delinquency trends, nonperforming asset amounts and ALL levels and ratios compared to our peer group as well as state and national statistics.  Similarly, following the Allowance Committee’s review and approval, a review is performed by the Risk Management Committee of the Board of Directors on a quarterly basis.

In addition to the reviews by management’s Allowance Committee and the Board of Directors’ Risk Management Committee, regulators from either the FDIC or the Pennsylvania Department of Banking and Securities perform an extensive review on an annual basis for the adequacy of the ALL and its conformity with regulatory guidelines and pronouncements.  Any recommendations or enhancements from these independent parties are considered by management and the Allowance Committee and implemented accordingly.

We acknowledge that this is a dynamic process and consists of factors, many of which are external and out of our control that can change often, rapidly and substantially.  The adequacy of the ALL is based upon estimates using all the information previously discussed as well as current and known circumstances and events.  There is no assurance that actual portfolio losses will not be substantially different than those that were estimated.

We utilize a structured methodology each period when analyzing the adequacy of the allowance for loan losses and the related provision for loan losses, which the Allowance Committee assesses regularly for appropriateness.  As part of the analysis as of September 30, 2018, we considered the economic conditions in our markets, such as unemployment and bankruptcy levels as well as changes in estimates of real estate collateral values. In addition, we considered the overall trends in asset quality, specific reserves needed and/or already established for criticized loans, historical loss rates, loss emergence periods and collateral valuations. The allowance for loan losses decreased by $820,000, or 1.4%, to $56.0 million, or 0.70% of total loans at September 30, 2018 from $56.8 million, or 0.73% of total loans, at December 31, 2017. This decrease is due primarily to the payoff of two commercial banking loans that had combined reserves of $3.5 million. Additionally, loans classified as substandard decreased to $235.4 million, or 2.9% of total loans, at September 30, 2018, from $237.8 million, or 3.1% of total loans, at December 31, 2017.

We also consider how the levels of non-accrual loans and historical charge-offs have influenced the required amount of allowance for loan losses.  Nonaccrual loans of $74.2 million or 0.93% of total loans receivable at September 30, 2018 increased by $9.7 million, or 15.2%, from $64.5 million, or 0.83% of total loans receivable, at December 31, 2017. This increase is due primarily to the downgrading of one commercial loan relationship totaling $8.4 million. As a percentage of average loans, annualized net charge-offs decreased to 0.29% for the nine months ended September 30, 2018 compared to 0.31% for the year ended December 31, 2017.

Comparison of Operating Results for the Quarters Ended September 30, 2018 and 2017

Net income for the quarter ended September 30, 2018 was $27.7 million, or $0.27 per diluted share, an increase of $4.1 million, or 17.6%, from net income of $23.6 million, or $0.23 per diluted share, for the quarter ended September 30, 2017.  The increase in net income resulted from an increase in interest income of $5.4 million, or 6.0%, and decreases in income tax expense of $5.4 million, or 43.3%, and noninterest expense of $2.2 million, or 3.2%. Partially offsetting these improvements was a decrease in noninterest income of $2.0 million, or 8.3%, and increases in the provision for loan losses of $4.0 million, or 130.7%, and interest expense of $2.8 million, or 39.9%. Net income for the quarter ended September 30, 2018 represents annualized returns on average equity and average assets of 8.93% and 1.15%, respectively, compared to 7.81% and 0.99% for the same quarter last year.  A further discussion of significant changes follows.

Interest Income

Total interest income increased by $5.4 million, or 6.0%, to $95.6 million for the quarter ended September 30, 2018 from $90.2 million for the quarter ended September 30, 2017. This increase is attributed to increases in both the average balance and average yield on interest earning assets. The average yield earned on interest earning assets increased to 4.31% for the quarter ended September 30, 2018 from 4.11% for the quarter ended September 30, 2017, due to recent increases in market interest rates. Additionally, the average balance of interest earning assets increased by $100.3 million, or 1.2%, to $8.806 billion for the quarter ended September 30, 2018 from $8.706 billion for the quarter ended September 30, 2017, due primarily to continued loan growth.

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Interest income on loans receivable increased by $5.3 million, or 6.3%, to $90.7 million for the quarter ended September 30, 2018 from $85.4 million for the quarter ended September 30, 2017.  This increase is attributed to increases in both the average balance and average yield on loans receivable. The average balance increased by $261.0 million, or 3.4%, to $7.927 billion for the quarter ended September 30, 2018 from $7.666 billion for the quarter ended September 30, 2017. This increase is due to organic loan growth of $269.9 million during the last twelve months. Additionally, the average yield on loans receivable increased to 4.54% for the quarter ended September 30, 2018 from 4.42% for the quarter ended September 30, 2017 primarily as a result of the recent increases in market interest rates. 

Interest income on mortgage-backed securities increased by $454,000, or 14.6%, to $3.6 million for the quarter ended September 30, 2018 from $3.1 million for the quarter ended September 30, 2017. This increase is attributed to an increase in average yield on mortgage-backed securities which increased to 2.39% for the quarter ended September 30, 2018 from 2.05% for the quarter ended September 30, 2017 due to both an increase in short-term market interest rates that positively impacted our adjustable rate mortgage-backed securities and the purchase of fixed rate mortgage-backed securities with yields higher than the existing portfolio. Partially offsetting this increase was a decrease in the average balance of mortgage-backed securities of $8.9 million, or 1.5%, to $598.6 million for the quarter ended September 30, 2018 from $607.5 million for the quarter ended September 30, 2017.

Interest income on investment securities decreased by $414,000, or 28.9%, to $1.0 million for the quarter ended September 30, 2018 from $1.4 million for the quarter ended September 30, 2017. This decrease is primarily attributable to a decrease in the average balance of investment securities of $108.5 million, or 30.7%, to $244.3 million for the quarter ended September 30, 2018 from $352.8 million for the quarter ended September 30, 2017.  This decrease is due primarily to the maturity or call of municipal and government agency securities. Partially offsetting this decrease was an increase in the average yield on investment securities to 1.67% for the quarter ended September 30, 2018 from 1.62% for the quarter ended September 30, 2017. 

Dividends on FHLB stock increased by $56,000, or 88.9%, to $119,000 for the quarter ended September 30, 2018 from $63,000 for the quarter ended September 30, 2017. This increase is attributable to increases in both the average balance and average yield on FHLB stock. The average yield increased to 4.81% for the quarter ended September 30, 2018 from 3.23% for the quarter ended September 30, 2017, as the yield generally tracks changes in market interest rates. Additionally, the average balance increased by $2.1 million, or 26.7% to $9.8 million for the quarter ended September 30, 2018 from $7.7 million for the quarter ended September 30, 2017. Required FHLB stock holdings fluctuate with, among other things, the utilization of our borrowing capacity as well as capital requirements established by the FHLB.

Interest income on interest-earning deposits decreased by $82,000, or 33.6%, to $162,000 for the quarter ended September 30, 2018 from $244,000 for the quarter ended September 30, 2017.  This decrease is attributable to a decrease in the average balance of interest-earning deposits which decreased by $45.4 million, or 63.5%, to $26.1 million for the quarter ended September 30, 2018 from $71.5 million for the quarter ended September 30, 2017, due to the utilization of excess cash to fund loan growth. Partially offsetting this decrease was an increase in the average yield on interest-earning deposits to 2.43% for the quarter ended September 30, 2018 from 1.33% for the quarter ended September 30, 2017, as a result of recent increases in the targeted Federal Funds rate by the Federal Reserve.

Interest Expense

Interest expense increased by $2.8 million, or 39.9%, to $9.8 million for the quarter ended September 30, 2018 from $7.0 million for the quarter ended September 30, 2017. This increase in interest expense was due to an increase in the average cost of interest-bearing liabilities, which increased to 0.60% for the quarter ended September 30, 2018 from 0.42% for the quarter ended September 30, 2017. This increase resulted from increases in the interest rate paid on deposits and borrowed funds in response to increases in market interest rates. Partially offsetting this increase in cost was a decrease in the average balance of interest-bearing liabilities of $109.7 million, or 1.7%, to $6.464 billion for the quarter ended September 30, 2018 from $6.573 billion for the quarter ended September 30, 2017. This decrease is due primarily to intensified competition for rate sensitive customers as well as the successful growth in noninterest-bearing checking deposits as the average balance increased by $151.3 million, or 9.6%, compared to last year.

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Net Interest Income

Net interest income increased by $2.6 million, or 3.1%, to $85.8 million for the quarter ended September 30, 2018 from $83.2 million for the quarter ended September 30, 2017.  This increase is attributable to the factors discussed above. Primarily as a result of the change in the mix of our interest-earning assets and interest-bearing liabilities, both our interest rate spread and net interest margin increased. Our interest rate spread increased to 3.71% for the quarter ended September 30, 2018 from 3.69% for the quarter ended September 30, 2017 and our net interest margin increased to 3.90% for the quarter ended September 30, 2018 from 3.82% for the quarter ended September 30, 2017.

Provision for Loan Losses

The provision for loan losses increased by $4.0 million, or 130.7%, to $7.0 million for the quarter ended September 30, 2018 from $3.0 million for the quarter ended September 30, 2017. This increase is due primarily to a $4.6 million write-down on one commercial real estate loan as well as an update of the quantitative and qualitative factors used to determine the allowance for loan losses. Despite the remaining $8.4 million balance of the previously mentioned charged-down loan becoming more than 90 days delinquent, overall credit quality remained largely unchanged. Total nonaccrual loans increased by $893,000, or 1.2%, however, nonaccrual loans decreased to 0.93% of total loans at September 30, 2018 from 0.95% of total loans at September 30, 2017, and annualized net charge-offs to average loans decreased to 0.42% for the quarter ended September 30, 2018 from 0.47% for the quarter ended September 30, 2017. Additionally, total loan delinquency decreased to $93.6 million, or 1.17%, of total loans at September 30, 2018 from $101.8 million, or 1.32% of total loans at September 30, 2017.

In determining the amount of the current period provision, we considered current economic conditions, including but not limited to unemployment levels, bankruptcy filings, and changes in real estate values and the impact of these factors on the quality of our loan portfolio and historical loss experience.  We analyze the allowance for loan losses as described in the section entitled “Allowance for Loan Losses.”  The provision that is recorded is sufficient, in our judgment, to bring this reserve to a level that reflects the losses inherent in our loan portfolio relative to loan mix, economic conditions and historical loss experience.

Noninterest Income

Noninterest income decreased by $2.0 million, or 8.3%, to $22.6 million for the quarter ended September 30, 2018 from $24.6 million for the quarter ended September 30, 2017. This decrease is due primarily to a $1.5 million gain on the sale of investments realized during the third quarter of 2017. Trust and other financial services income decreased by $539,000, or 11.2%, to $4.3 million for the quarter ended September 30, 2018 from $4.8 million for the quarter ended September 30, 2017. This decrease is due primarily to the sale of our retirement services subsidiary in December 2017. Additionally, mortgage banking income decreased by $437,000, or 84.2%, to $82,000 as result of decreased sales of residential mortgage loans into the secondary market. Partially offsetting these factors was a $434,000, or 3.4%, increase in service charges and fees due primarily to increased debit card usage. Additionally, income on bank owned life insurance increased by $382,000, or 35.4%, due to a death benefit received during the current year's quarter.

Noninterest Expense

Noninterest expense decreased by $2.2 million, or 3.2%, to $66.6 million for the quarter ended September 30, 2018 from $68.8 million for the quarter ended September 30, 2017.  All noninterest expenses categories, with the exception of compensation and employee benefits and professional services, decreased compared to last year's quarter. Most of these decreases are due primarily to the restructuring that occurred during 2017, including a reduction of $1.2 million, or 86.7%, in acquisition/ restructuring expenses related to the closure of our consumer finance subsidiary and the sale of our three Maryland offices and retirement services business. Marketing expenses also decreased by $539,000, or 21.7%, to $1.9 million for the quarter ended September 30, 2018 from $2.5 million for the quarter ended September 30, 2017, due primarily to the timing of checking account acquisition campaigns. Partially offsetting these decreases was an increase in compensation and employee benefits of $979,000, or 2.7%, to $37.5 million for the quarter ended September 30, 2018 from $36.6 million for the quarter ended September 30, 2017, due primarily to normal annual salary increases as well as increases in the cost of other employee benefits.

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Income Taxes

The provision for income taxes decreased by $5.4 million, or 43.3%, to $7.0 million for the quarter ended September 30, 2018 from $12.4 million for the quarter ended September 30, 2017. This decrease is primarily a result of the enactment of the Tax Cuts and Jobs Act in December 2017. Our effective tax rate, which includes both federal and state income taxes, decreased to 20.2% for the quarter ended September 30, 2018 from 34.5% for the quarter ended September 30, 2017. In addition, income before taxes decreased by $1.2 million, or 3.4%, to $34.8 million for the quarter ended September 30, 2018 from $36.0 million for the quarter ended September 30, 2017. We anticipate our effective tax rate to be between 21.0% and 23.0% for the year ending December 31, 2018.

Comparison of Operating Results for theNine Months Ended September 30, 2018and2017

Net income for the nine months endedSeptember 30, 2018 was $79.0 million, or $0.76 per diluted share, an increase of $6.7 million, or 9.3%, from $72.3 million, or $0.71 per diluted share, for the nine months endedSeptember 30, 2017.  The increase in net income resulted from an increase in interest income of $10.7 million, or 4.0%, and decreases in income tax expense of $14.0 million, or 40.1% and noninterest expense of $9.9 million, or 4.6%. Partially offsetting these improvements was a decrease in noninterest income of $19.1 million, or 21.8%, and increases in the provision for loan losses of $3.3 million, or 25.1%, and interest expense of $5.4 million, or 26.3%. Net income for the nine months endedSeptember 30, 2018 represents annualized returns on average equity and average assets of 8.67% and 1.11%, respectively, compared to 8.16% and 1.01% for the nine months endedSeptember 30, 2017.  A discussion of significant changes follows.

Interest Income

Total interest income increased by $10.7 million, or 4.0%, to $278.0 million for the nine months endedSeptember 30, 2018 from $267.3 million for the nine months endedSeptember 30, 2017. This increase is the result of an increase in the average yield earned on interest earning assets to 4.26% for the nine months endedSeptember 30, 2018 from 4.06% for the nine months endedSeptember 30, 2017. This increase in average yield is related to both the change in interest-earning asset mix as well as the increase in market interest rates. Partially offsetting this increase was a decrease in the average balance of interest earning assets of $62.8 million, or 0.7%, to $8.735 billion for the nine months endedSeptember 30, 2018 from $8.798 billion for the nine months ended September 30, 2017.

Interest income on loans receivable increased by $11.3 million, or 4.4%, to $264.1 million for the nine months endedSeptember 30, 2018 from $252.8 million for the nine months endedSeptember 30, 2017.  This increase is attributed to increases in both the average balance and average yield on loans receivable. The average balance increased by $188.5 million, or 2.5%, to $7.851 billion for the nine months endedSeptember 30, 2018 from $7.663 billion for the nine months endedSeptember 30, 2017. This increase is due to organic loan growth of $269.9 million during the last twelve months. Additionally, the average yield on loans receivable increased to 4.50% for the nine months endedSeptember 30, 2018 from 4.41% for the nine months endedSeptember 30, 2017, primarily as a result of the recent increases in market interest rates. 

Interest income on mortgage-backed securities increased by $1.5 million, or 18.2%, to $9.8 million for the nine months endedSeptember 30, 2018 from $8.3 million for the nine months endedSeptember 30, 2017. This increase is attributed to increases in both the average balance and average yield on mortgage-backed securities.The average balance of mortgage-backed securities increased by $17.9 million, or 3.2%, to $575.7 million for the nine months endedSeptember 30, 2018 from $557.8 million for the nine months endedSeptember 30, 2017. This increase is due primarily to the purchase of higher yielding mortgage-backed securities with the cash flow from our investment securities portfolio. Additionally, the average yield on mortgage-backed securities increased to 2.28% for the nine months endedSeptember 30, 2018 from 1.99% for the nine months endedSeptember 30, 2017, due to both an increase in short-term market interest rates that positively impacted our adjustable rate mortgage-backed securities and the purchase of fixed-rate mortgage-backed securities with yields higher than the existing portfolio.

Interest income on investment securities decreased by $1.5 million, or 32.5%, to $3.0 million for the nine months endedSeptember 30, 2018 from $4.5 million for the nine months endedSeptember 30, 2017. This decrease is primarily attributable to a decrease in the average balance of investment securities of $122.2 million, or 33.2%, to $245.4 million for the nine months endedSeptember 30, 2018 from $367.6 million for the nine months endedSeptember 30, 2017.  This decrease is due primarily to the maturity or call of municipal and government agency securities. Partially offsetting this decrease was an increase in the average yield on investment securities to 1.66% for the nine months endedSeptember 30, 2018 from 1.64% for the nine months endedSeptember 30, 2017. 

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Dividends on FHLB stock increased by $129,000, or 75.0%, to $301,000 for the nine months ended September 30, 2018 from $172,000 for the nine months ended September 30, 2017. This increase is attributable to increases in both the average balance and average yield on FHLB stock. The average yield increased to 4.47% for the nine months ended September 30, 2018 from 3.04% for the nine months ended September 30, 2017, as the yield generally tracks changes in market interest rates. Additionally, the average balance increased by $1.4 million, or 19.1% to $9.0 million for the nine months ended September 30, 2018 from $7.6 million for the nine months ended September 30, 2017. Required FHLB stock holdings fluctuate with, among other things, the utilization of our borrowing capacity as well as capital requirements established by the FHLB.

Interest income on interest-earning deposits decreased by $674,000, or 46.8%, to $766,000 for the nine months ended September 30, 2018 from $1.4 million for the nine months ended September 30, 2017.  This decrease is attributable to a decrease in the average balance of interest-earning deposits which decreased by $148.3 million, or 73.6%, to $53.3 million for the nine months ended September 30, 2018 from $201.6 million for the nine months ended September 30, 2017, due to the utilization of excess cash to fund loan growth. Partially offsetting this decrease was an increase in the average yield on interest-earning deposits to 1.90% for the nine months ended September 30, 2018 from 0.94% for the nine months ended September 30, 2017, as a result of recent increases in the targeted Federal Funds rate by the Federal Reserve.

Interest Expense

Interest expense increased by $5.4 million, or 26.3%, to $26.2 million for the nine months ended September 30, 2018 from $20.8 million for the nine months ended September 30, 2017. This increase in interest expense was due to an increase in the average cost of interest-bearing liabilities to 0.54% for the nine months ended September 30, 2018 from 0.41% for the nine months ended September 30, 2017. This increase resulted from increases in the interest rate paid on deposits and borrowed funds in response to increases in market interest rates. Partially offsetting this increase in cost was a decrease in the average balance of interest-bearing liabilities of $241.1 million, or 3.6%, to $6.478 billion for the nine months ended September 30, 2018 from $6.719 billion for the nine months ended September 30, 2017. This decrease is due primarily to the sale of our three Maryland offices in May 2017 with deposits of $211.7 million as well as increased competition for rate sensitive customers. In addition, our efforts to grow noninterest-bearing checking accounts have been successful, increasing the average balance by $127.6 million, or 8.3%, to $1.669 billion at September 30, 2018 from $1.542 billion at September 30, 2017,

Net Interest Income

Net interest income increased by $5.3 million, or 2.1%, to $251.8 million for the nine months ended September 30, 2018 from $246.5 million for the nine months ended September 30, 2017.  This increase is attributable to the factors discussed above. As a result of loan growth and the continued change in our deposit mix toward lower cost accounts, both our interest rate spread and net interest margin increased. Our interest rate spread increased to 3.71% for the nine months ended September 30, 2018 from 3.65% for the nine months ended September 30, 2017 and our net interest margin increased to 3.84% for the nine months ended September 30, 2018 from 3.74% for the nine months ended September 30, 2017.

Provision for Loan Losses

The provision for loan losses increased by $3.3 million, or 25.1%, to $16.5 million for the nine months ended September 30, 2018 from $13.2 million for the nine months ended September 30, 2017. This increase is due primarily to the $4.6 million write-down on a commercial real estate loan along with the other factors discussed in the "Comparison of Operating Results for the Quarters Ended September 30, 2018 and 2017" section.

In determining the amount of the current period provision, we considered current economic conditions, including but not limited to unemployment levels, bankruptcy filings, and changes in real estate values and the impact of these factors on the quality of our loan portfolio and historical loss experience.  We analyze the allowance for loan losses as described in the section entitled “Allowance for Loan Losses.”  The provision that is recorded is sufficient, in our judgment, to bring this reserve to a level that reflects the losses inherent in our loan portfolio relative to loan mix, economic conditions and historical loss experience.

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Noninterest Income

Noninterest income decreased by $19.1 million, or 21.8%, to $68.5 million for the nine months ended September 30, 2018 from $87.6 million for the nine months ended September 30, 2017. This decrease is due primarily to the $17.2 million gain recognized on the sale of our Maryland offices during the second quarter of 2017. Additionally, trust and other financial services income decreased by $1.4 million, or 9.9%, due primarily to the sale of our retirement services subsidiary in December 2017. Positively impacting noninterest income during the nine months ended September 30, 2018 was $1.7 million in death benefits received on bank owned life insurance, an increase in service charges and fees of $775,000, or 2.1% as a result of increased debit card usage and a $222,000, or 3.5%, increase in other operating income due to the growth in fee income associated with commercial lending activity.

Noninterest Expense

Noninterest expense decreased by $9.9 million, or 4.6%, to $203.8 million for the nine months endedSeptember 30, 2018 from $213.7 million for the nine months endedSeptember 30, 2017.  All noninterest expenses categories, with the exception of compensation and employee benefits and professional services, decreased compared to last year. Most of these decreases are a result of the restructuring that occurred during 2017, including a reduction of $3.7 million, or 86.4%, in acquisition/ restructuring expenses related to the closure of our consumer finance subsidiary and the sale of our three Maryland offices and retirement services business. Additionally, marketing expenses decreased by $1.4 million, or 18.4%, to $6.1 million for the nine months ended September 30, 2018 from $7.5 million for the nine months ended September 30, 2017, due primarily to the timing of checking account acquisition campaigns. Partially offsetting these decreases was an increase in professional services of $116,000, or 1.6%, primarily as a result of consulting engagements related to the implementation of ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments.

Income Taxes

The provision for income taxes decreased by $14.0 million, or 40.1%, to $20.9 million for the nine months ended September 30, 2018 from $34.9 million for the nine months ended September 30, 2017. This decrease is due primarily to a decrease in income before tax of $7.3 million, or 6.8%, to $99.9 million for the nine months ended September 30, 2018 from $107.2 million for the nine months ended September 30, 2017. In addition, primarily as a result of the enactment of the Tax Cuts and Jobs Act in December 2017, our effective tax rate, which includes both federal and state income taxes, decreased to 20.9% for the nine months ended September 30, 2018 from 32.5% for the nine months ended September 30, 2017. We anticipate our effective tax rate to be between 21.0% and 23.0% for the year ending December 31, 2018.

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Average Balance Sheet

(Dollars in thousands)

The following table sets forth certain information relating to the Company’s average balance sheet and reflects the average yield on interest-earning assets and average cost of interest-bearing liabilities for the periods indicated.  Such yields and costs are derived by dividing income or expense by the average balance of assets or liabilities, respectively, for the periods presented.  Average balances are calculated using daily averages. 

	Quarter ended September 30,
	2018						2017
	Average balance			Interest	Avg. yield/ cost (g)		Average balance			Interest	Avg. yield/ cost (g)
Assets:
Interest-earning assets:
Residential mortgage loans	$	2,804,027		28,974	4.13	%	$	2,732,546		28,279	4.14	%
Home equity loans	1,272,847			15,248	4.75	%	1,299,473			14,694	4.49	%
Consumer loans	704,203			8,337	4.70	%	617,754			7,627	4.90	%
Legacy consumer finance loans	7,176			343	19.12	%	33,469			1,433	17.13	%
Commercial real estate loans	2,540,270			29,974	4.62	%	2,389,969			27,234	4.46	%
Commercial loans	598,842			8,203	5.36	%	593,143			6,659	4.39	%
Loans receivable (a) (b) (includes FTE adjustments of $346 and $553, respectively)	7,927,365			91,079	4.56	%	7,666,354			85,926	4.45	%
Mortgage-backed securities (c)	598,596			3,572	2.39	%	607,454			3,118	2.05	%
Investment securities (c) (includes FTE adjustments of $55 and $257, respectively)	244,346			1,074	1.76	%	352,813			1,690	1.92	%
FHLB stock	9,819			119	4.81	%	7,748			63	3.23	%
Other interest-earning deposits	26,057			162	2.43	%	71,482			243	1.33	%
Total interest-earning assets (includes FTE adjustments of $401 and $809, respectively)	8,806,183			96,006	4.33	%	8,705,851			91,040	4.15	%
Noninterest earning assets (d)	746,077						755,026
Total assets	$	9,552,260					$	9,460,877
Liabilities and shareholders’ equity:
Interest-bearing liabilities:
Savings deposits	$	1,672,990		785	0.19	%	$	1,681,777		776	0.18	%
Interest-bearing checking deposits	1,460,556			1,064	0.29	%	1,435,143			297	0.08	%
Money market deposit accounts	1,685,368			1,565	0.37	%	1,789,082			1,048	0.23	%
Time deposits	1,403,967			4,819	1.36	%	1,449,830			3,674	1.01	%
Borrowed funds (e)	129,523			239	0.73	%	106,282			49	0.18	%
Junior subordinated debentures	111,213			1,316	4.63	%	111,213			1,150	4.05	%
Total interest-bearing liabilities	6,463,617			9,788	0.60	%	6,573,327			6,994	0.42	%
Noninterest-bearing checking deposits (f)	1,724,427						1,573,112
Noninterest-bearing liabilities	132,062						116,021
Total liabilities	8,320,106						8,262,460
Shareholders’ equity	1,232,154						1,198,417
Total liabilities and shareholders’ equity	$	9,552,260					$	9,460,877
Net interest income/ Interest rate spread				86,218	3.73	%				84,046	3.73	%
Net interest-earning assets/ Net interest margin	$	2,342,566			3.92	%	$	2,132,524			3.86	%
Ratio of interest-earning assets to interest-bearing liabilities	1.36		X				1.32		X

(a) Average gross loans includes loans held as available-for-sale and loans placed on nonaccrual status.

(b) Interest income includes accretion/ amortization of deferred loan fees/ expenses, which were not material.

(c) Average balances do not include the effect of unrealized gains or losses on securities held as available-for-sale.

(d) Average balances include the effect of unrealized gains or losses on securities held as available-for-sale.

(e) Average balances include FHLB borrowings and collateralized borrowings.

(f) Average cost of deposits including noninterest-bearing checking were 0.41% and 0.29%, respectively.

(g) Annualized. Shown on a fully tax-equivalent basis (“FTE”). The FTE basis adjusts for the tax benefit of income on certain tax exempt loans and investments using the federal statutory rate applicable to each period presented. We believe this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts. GAAP basis yields were: loans — 4.54 % and 4.42%, respectively; investment securities — 1.67% and 1.62%, respectively; interest-earning assets — 4.31% and 4.11%, respectively. GAAP basis net interest rate spreads were 3.71% and 3.69%, respectively; and GAAP basis net interest margins were 3.90% and 3.82%, respectively.

57

Rate/ Volume Analysis

(Dollars in Thousands)

The following table represents the extent to which changes in interest rates and changes in the volume of interest-earning assets and interest-bearing liabilities have affected interest income and interest expense during the periods indicated.  Information is provided in each category with respect to (i) changes attributable to changes in volume (changes in volume multiplied by prior rate), (ii) changes attributable to changes in rate (changes in rate multiplied by prior volume), and (iii) net change.  Changes that cannot be attributed to either rate or volume have been allocated to both rate and volume.

Quarters ended September 30, 2018 and 2017

	Rate			Volume		Net Change
Interest earning assets:
Loans receivable	$	2,228		2,925		5,153
Mortgage-backed securities	499			(45	)	454
Investment securities	(139		)	(477	)	(616	)
FHLB stock	31			25		56
Other interest-earning deposits	201			(282	)	(81	)
Total interest-earning assets	2,820			2,146		4,966
Interest-bearing liabilities:
Savings deposits	13			(4	)	9
Interest-bearing checking deposits	748			19		767
Money market deposit accounts	613			(96	)	517
Time deposits	1,302			(157	)	1,145
Borrowed funds	147			43		190
Junior subordinated debentures	166			—		166
Total interest-bearing liabilities	2,989			(195	)	2,794
Net change in net interest income	$	(169	)	2,341		2,172

58

Average Balance Sheet

(Dollars in thousands)

The following table sets forth certain information relating to the Company’s average balance sheet and reflects the average yield on interest-earning assets and average cost of interest-bearing liabilities for the periods indicated.  Such yields and costs are derived by dividing income or expense by the average balance of assets or liabilities, respectively, for the periods presented.  Average balances are calculated using daily averages.

	Nine months ended September 30,
	2018						2017
	Average balance			Interest	Avg. yield/ cost (g)		Average balance			Interest	Avg. yield/ cost (g)
Assets:
Interest-earning assets:
Residential mortgage loans	$	2,774,074		84,585	4.07	%	$	2,724,348		83,833	4.10	%
Home equity loans	1,284,114			45,617	4.75	%	1,314,344			43,239	4.40	%
Consumer loans	666,055			23,788	4.78	%	598,056			22,251	4.97	%
Legacy consumer finance loans	10,923			1,627	19.86	%	40,241			6,025	19.96	%
Commercial real estate loans	2,510,206			86,188	4.53	%	2,425,302			80,867	4.40	%
Commercial loans	606,076			23,273	5.06	%	560,677			18,260	4.29	%
Loans receivable (a) (b) (includes FTE adjustments of $1,019 and $1,637, respectively)	7,851,448			265,078	4.51	%	7,662,968			254,475	4.44	%
Mortgage-backed securities (c)	575,663			9,839	2.28	%	557,846			8,327	1.99	%
Investment securities (c) (includes FTE adjustments of $241 and $848, respectively)	245,429			3,289	1.79	%	367,585			5,366	1.95	%
FHLB stock	8,999			301	4.47	%	7,553			172	3.04	%
Other interest-earning deposits	53,254			766	1.90	%	201,643			1,440	0.94	%
Total interest-earning assets (includes FTE adjustments of $1,260 and $2,485, respectively)	8,734,793			279,273	4.27	%	8,797,595			269,780	4.10	%
Noninterest earning assets (d)	753,403						742,837
Total assets	$	9,488,196					$	9,540,432
Liabilities and shareholders’ equity:
Interest-bearing liabilities:
Savings deposits	$	1,680,892		2,307	0.18	%	$	1,699,455		2,300	0.18	%
Interest-bearing checking deposits	1,449,573			2,541	0.23	%	1,436,442			696	0.06	%
Money market deposit accounts	1,694,519			3,830	0.30	%	1,835,638			3,186	0.23	%
Time deposits	1,419,849			13,322	1.25	%	1,513,565			10,904	0.96	%
Borrowed funds (e)	122,376			412	0.45	%	123,168			161	0.17	%
Junior subordinated debentures	111,213			3,791	4.50	%	111,213			3,503	4.15	%
Total interest-bearing liabilities	6,478,422			26,203	0.54	%	6,719,481			20,750	0.41	%
Noninterest-bearing checking deposits	1,669,423						1,541,845
Noninterest-bearing liabilities	122,199						94,546
Total liabilities	8,270,044						8,355,872
Shareholders’ equity	1,218,152						1,184,560
Total liabilities and shareholders’ equity	$	9,488,196					$	9,540,432
Net interest income/ Interest rate spread				253,070	3.73	%				249,030	3.69	%
Net interest-earning assets/ Net interest margin	$	2,256,371			3.86	%	$	2,078,114			3.77	%
Ratio of interest-earning assets to interest-bearing liabilities	1.35		X				1.31		X

(a) Average gross loans includes loans held as available-for-sale and loans placed on nonaccrual status.

(b) Interest income includes accretion/ amortization of deferred loan fees/ expenses, which were not material.

(c) Average balances do not include the effect of unrealized gains or losses on securities held as available-for-sale.

(d) Average balances include the effect of unrealized gains or losses on securities held as available-for-sale.

(e) Average balances include FHLB borrowings and collateralized borrowings.

(f) Average cost of deposits were 0.37% and 0.28%, respectively.

(g)  Annualized. Shown on a fully tax-equivalent basis (“FTE”). The FTE basis adjusts for the tax benefit of income on certain tax exempt loans and investments using the federal statutory rate applicable to each period presented. We believe this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts. GAAP basis yields were: loans  – 4.50% and 4.41%, respectively; investment securities  –1.66% and 1.64%, respectively; interest-earning assets  – 4.26% and 4.06%, respectively. GAAP basis net interest rate spreads were 3.71% and 3.65%, respectively; and GAAP basis net interest margins were 3.84% and 3.74%, respectively.

59

Rate/ Volume Analysis

(Dollars in Thousands)

The following table represents the extent to which changes in interest rates and changes in the volume of interest-earning assets and interest-bearing liabilities have affected interest income and interest expense during the periods indicated.  Information is provided in each category with respect to (i) changes attributable to changes in volume (changes in volume multiplied by prior rate), (ii) changes attributable to changes in rate (changes in rate multiplied by prior volume), and (iii) net change.  Changes that cannot be attributed to either rate or volume have been allocated to both rate and volume. 

Nine months ended September 30,2018 and 2017

	Rate			Volume		Net Change
Interest earning assets:
Loans receivable	$	4,344		6,259		10,603
Mortgage-backed securities	1,207			305		1,512
Investment securities	(440		)	(1,637	)	(2,077	)
FHLB stock	81			48		129
Other interest-earning deposits	886			(1,560	)	(674	)
Total interest-earning assets	6,078			3,415		9,493
Interest-bearing liabilities:
Savings deposits	32			(25	)	7
Interest-bearing checking deposits	1,822			23		1,845
Money market deposit accounts	889			(245	)	644
Time deposits	3,093			(675	)	2,418
Borrowed funds	254			(3	)	251
Junior subordinated debentures	288			—		288
Total interest-bearing liabilities	6,378			(925	)	5,453
Net change in net interest income	$	(300	)	4,340		4,040

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As the holding company for a savings bank, one of our primary market risks is interest rate risk.  Interest rate risk is the sensitivity of net interest income to variations in interest rates over a specified time period.  The sensitivity results from differences in the time periods in which interest rate sensitive assets and liabilities mature or re-price.  We attempt to control interest rate risk by matching, within acceptable limits, the re-pricing periods of assets and liabilities.  We have attempted to limit our exposure to interest sensitivity by increasing core deposits, enticing customers to extend certificates of deposit maturities, borrowing funds with fixed-rates and longer maturities and by shortening the maturities of our assets by emphasizing the origination of more short-term fixed rate loans and adjustable rate loans. We also continue to sell a portion of the long-term, fixed-rate mortgage loans that we originate.  In addition, we purchase shorter term or adjustable-rate investment securities and mortgage-backed securities.

We have an Asset/Liability Committee consisting of members of management which meets monthly to review market interest rates, economic conditions, the pricing of interest-earning assets and interest-bearing liabilities and the balance sheet structure.  On a quarterly basis, this Committee also reviews the interest rate risk position and cash flow projections.

The Board of Directors has a Risk Management Committee which meets quarterly and reviews interest rate risk and trends, our interest sensitivity position, the liquidity position and the market risk inherent in the investment portfolio.

In an effort to assess interest rate risk and market risk, we utilize a simulation model to determine the effect of immediate incremental increases and decreases in interest rates on net income and the market value of equity.  Certain assumptions are made regarding loan prepayments and decay rates of savings and interest-bearing demand accounts.  Because it is difficult to accurately

60

project the market reaction of depositors and borrowers, the effect of actual changes in interest rates on these assumptions may differ from simulated results.  We have established the following guidelines for assessing interest rate risk:

Net interest income simulation.  Given a parallel shift of 100 basis points (“bps”), 200 bps and 300 bps in interest rates, the estimated net income may not decrease by more than 5%, 10% and 15%, respectively, within a one-year period.

Net income simulation.  Given a parallel shift of 100 bps, 200 bps and 300 bps in interest rates, the estimated net income may not decrease by more than 10%, 20% and 30%, respectively, within a one-year period.

Market value of equity simulation.  The market value of equity is the present value of assets and liabilities.  Given a parallel shift of 100 bps, 200 bps and 300 bps in interest rates, the market value of equity may not decrease by more than 15%, 30% and 35%, respectively, from the computed economic value at current interest rate levels.

The following table illustrates the simulated impact of a 100 bps, 200 bps or 300 bps upward or a 100 bps downward movement in interest rates on net income, return on average equity, earnings per share and market value of equity.  This analysis was prepared assuming that interest-earning asset and interest-bearing liability levels at September 30, 2018 remain constant. The impact of the rate movements was computed by simulating the effect of an immediate and sustained shift in interest rates over a twelve-month period from September 30, 2018 levels.

	Increase									Decrease
Parallel shift in interest rates over the next 12 months	100 bps			200 bps			300 bps			100 bps
Projected percentage increase/ (decrease) in net interest income	(0.5		)%	(0.7		)%	(1.2		)%	(3.5		)%
Projected percentage increase/ (decrease) in net income	(1.1		)%	(1.4		)%	(2.4		)%	(8.2		)%
Projected increase/ (decrease) in return on average equity	(1.0		)%	(1.2		)%	(2.3		)%	(7.8		)%
Projected increase/ (decrease) in earnings per share	$	(0.01	)	$	(0.02	)	$	(0.03	)	$	(0.09	)
Projected percentage increase/ (decrease) in market value of equity	(3.8		)%	(7.0		)%	(10.5		)%	0.1		%

The figures included in the table above represent projections that were computed based upon certain assumptions including prepayment rates and decay rates. These assumptions are inherently uncertain and, as a result, cannot precisely predict the impact of changes in interest rates. Actual results may differ significantly due to timing, magnitude and frequency of interest rate changes and changes in market conditions, and actions that may be taken by management in response to interest rate changes.

61

ITEM 4.CONTROLS AND PROCEDURES

Under the supervision of and with the participation of management, including the Principal Executive Officer and Principal Financial Officer, we evaluated the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) as of the end of the period covered by this quarterly report (the “Evaluation Date”).  Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that, as of the Evaluation Date, these disclosure controls and procedures were effective.

There were no changes in the internal controls over financial reporting during the period covered by this report or in other factors that have materially affected, or are reasonably likely to materially affect the internal control over financial reporting.

PART II.OTHER INFORMATION

Item 1. Legal Proceedings

We are subject to a number of asserted and unasserted claims encountered in the normal course of business.  We believe that any additional liability, other than that which has already been accrued, that may result from such potential litigation will not have a material adverse effect on the financial statements.  However, we cannot presently determine whether or not any claims against us will have a material adverse effect on our results of operations in any future reporting period. Refer to note 11.

Item 1A.  Risk Factors

Except as previously disclosed, there have been no material updates or additions to the risk factors previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017 as filed with the Securities and Exchange Commission. Additional risks not presently known to us, or that we currently deem immaterial, may also adversely affect our business, financial condition or results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

a.) Not applicable.

b.) Not applicable.

c.)            The following table discloses information regarding the repurchase of shares of common stock during the quarter ending September 30, 2018: 

Month	Number of shares purchased	Average price paid per share		Total number of shares purchased as part of a publicly announced repurchase plan (1)	Maximum number of shares yet to be purchased under the plan (1)
July	—	$	—	—	4,834,089
August	—	—		—	4,834,089
September	—	—		—	4,834,089
	—	$	—

(1) Reflects the program for 5,000,000 shares announced December 13, 2012. This program does not have an expiration date.

62

Item 3. Defaults Upon Senior Securities

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Not applicable.

Item 6. Exhibits

31.1	Certification of the Chief Executive Officer pursuant to Rule 13a-15 or 15d-15 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of the Chief Financial Officer pursuant to Rule 13a-15 or 15d-15 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

63

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed by the undersigned thereunto duly authorized.

NORTHWEST BANCSHARES, INC.
(Registrant)
Date:	November 8, 2018	By:	/s/ Ronald J. Seiffert
			Ronald J. Seiffert
			President and Chief Executive Officer
			(Duly Authorized Officer)
Date:	November 8, 2018	By:	/s/ William W. Harvey, Jr.
			William W. Harvey, Jr.
			Senior Executive Vice President, Finance and
			Chief Financial Officer
			(Principal Accounting Officer)

64

EX-31.1

Exhibit 31.1

Certification

I, Ronald J. Seiffert, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Northwest Bancshares, Inc.;

2. Based on my knowledge, this report does not contain any untrue statements of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

November 8, 2018	/s/ Ronald J. Seiffert
Date	Ronald J. Seiffert
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification

I, William W. Harvey, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Northwest Bancshares, Inc.;

2. Based on my knowledge, this report does not contain any untrue statements of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

November 8, 2018	/s/ William W. Harvey, Jr.
Date	William W. Harvey, Jr.
	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification by the Chief Executive Officer and Chief Financial Officer

The undersigned officers of Northwest Bancshares, Inc. (the “Company”) hereby certify that, to the best of their knowledge:

1. The Company’s quarterly report on Form 10-Q for the period ended September 30, 2018 (the “Report”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 8, 2018	/s/ Ronald J. Seiffert
Date	Ronald J. Seiffert
	President and Chief Executive Officer
November 8, 2018	/s/ William W. Harvey, Jr.
Date	William W. Harvey, Jr.
	Chief Financial Officer

The purpose of this statement is solely to comply with Title 18, Chapter 63, Section 1350 of the United States Code, as amended by Section 906 of the Sarbanes-Oxley Act of 2002.

A signed original of this written statement required by Section 906 has been provided to Northwest Bancshares, Inc. and will be retained by Northwest Bancshares, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document and Entity Information
Entity Registrant Name	Northwest Bancshares, Inc.
Entity Central Index Key	0001471265
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		103,300,768
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3

XML

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 73,946	$ 77,710
Marketable securities available-for-sale (amortized cost of $829,345 and $800,094)	811,556	792,535
Marketable securities held-to-maturity (fair value of $23,534 and $29,667)	24,222	29,678
Total cash and cash equivalents and marketable securities	909,724	899,923
Personal Banking loans:
Residential mortgage loans held-for-sale	0	3,128
Residential mortgage loans	2,846,834	2,773,075
Home equity loans	1,272,345	1,310,355
Consumer loans	776,049	671,389
Total Personal Banking loans	4,895,228	4,757,947
Commercial Banking loans:
Commercial real estate loans	2,518,066	2,454,726
Commercial loans	582,768	580,736
Total Commercial Banking loans	3,100,834	3,035,462
Total loans	7,996,062	7,793,409
Allowance for loan losses	(55,975)	(56,795)
Total loans, net	7,940,087	7,736,614
Federal Home Loan Bank stock, at cost	15,452	11,733
Accrued interest receivable	25,798	23,352
Real estate owned, net	2,486	5,666
Premises and equipment, net	144,612	151,944
Bank owned life insurance	170,042	171,547
Goodwill	307,420	307,420
Other intangible assets	21,167	25,669
Other assets	38,543	30,066
Total assets	9,575,331	9,363,934
Liabilities:
Noninterest-bearing checking deposits	1,724,202	1,610,409
Interest-bearing checking deposits	1,499,344	1,442,928
Money market deposit accounts	1,676,845	1,707,450
Savings deposits	1,650,357	1,653,579
Time deposits	1,403,205	1,412,623
Total deposits	7,953,953	7,826,989
Borrowed funds	179,117	108,238
Junior subordinated debentures	111,213	111,213
Advances by borrowers for taxes and insurance	23,297	40,825
Accrued interest payable	627	460
Other liabilities	66,448	68,485
Total liabilities	8,334,655	8,156,210
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, 103,293,480 shares and 102,394,828 shares issued, respectively	1,033	1,027
Paid-in capital	742,863	730,719
Retained earnings	541,469	508,058
Accumulated other comprehensive loss	(44,689)	(32,080)
Total shareholders’ equity	1,240,676	1,207,724
Total liabilities and shareholders’ equity	$ 9,575,331	$ 9,363,934

XML

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Marketable securities available-for-sale, amortized cost	$ 829,345	$ 800,094
Marketable securities held-to-maturity, fair value	$ 23,534	$ 29,667
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)	103,293,480	102,394,828

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CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Loans receivable	$ 90,733	$ 85,373	$ 264,059	$ 252,838
Mortgage-backed securities	3,572	3,118	9,839	8,327
Taxable investment securities	814	957	2,140	2,944
Tax-free investment securities	205	476	908	1,574
FHLB dividends	119	63	301	172
Interest-earning deposits	162	244	766	1,440
Total interest income	95,605	90,231	278,013	267,295
Interest expense:
Deposits	8,233	5,795	22,000	17,086
Borrowed funds	1,555	1,199	4,203	3,664
Total interest expense	9,788	6,994	26,203	20,750
Net interest income	85,817	83,237	251,810	246,545
Provision for loan losses	6,982	3,027	16,540	13,226
Net interest income after provision for loan losses	78,835	80,210	235,270	233,319
Noninterest income:
Gain on sale of investments	0	1,497	153	1,517
Service charges and fees	13,158	12,724	37,965	37,190
Trust and other financial services income	4,254	4,793	12,335	13,697
Insurance commission income	2,046	1,992	6,885	7,139
Loss on real estate owned, net	(247)	(193)	(617)	(490)
Income from bank owned life insurance	1,460	1,078	4,783	3,798
Mortgage banking income	82	519	383	1,193
Gain on sale of offices	0	0	0	17,186
Other operating income	1,804	2,184	6,567	6,345
Total noninterest income	22,557	24,594	68,454	87,575
Noninterest expense:
Compensation and employee benefits	37,535	36,556	113,076	113,003
Premises and occupancy costs	6,821	6,951	20,952	21,570
Office operations	3,508	3,939	10,684	12,331
Collections expense	483	568	1,429	1,670
Processing expenses	9,620	9,650	28,886	29,198
Marketing expenses	1,949	2,488	6,103	7,482
Federal deposit insurance premiums	721	771	2,109	2,794
Professional services	2,368	2,321	7,464	7,348
Amortization of intangible assets	1,462	1,691	4,502	5,189
Real estate owned expense	205	310	630	809
Restructuring/ acquisition expense	186	1,398	579	4,255
Other expenses	1,759	2,156	7,411	8,058
Total noninterest expense	66,617	68,799	203,825	213,707
Income before income taxes	34,775	36,005	99,899	107,187
Federal and state income taxes expense	7,035	12,414	20,875	34,868
Net income	$ 27,740	$ 23,591	$ 79,024	$ 72,319
Basic earnings per share (in dollars per share)	$ 0.27	$ 0.23	$ 0.78	$ 0.72
Diluted earnings per share (in dollars per share)	$ 0.27	$ 0.23	$ 0.76	$ 0.71

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 27,740	$ 23,591	$ 79,024	$ 72,319
Net unrealized holding gains/ (losses) on marketable securities:
Unrealized holding gains/ (losses) net of tax of $788, $164, $2,869, and $(995), respectively	(1,970)	(264)	(7,169)	1,684
Reclassification adjustment for gains included in net income, net of tax of $17, $369, $54 and $416, respectively	(44)	(674)	(138)	(741)
Net unrealized holding gains/ (losses) on marketable securities	(2,014)	(938)	(7,307)	943
Change in fair value of interest rate swaps, net of tax of $(51), $(138), $(204), and $(419), respectively	192	258	766	779
Defined benefit plan:
Reclassification adjustments for prior period service costs and net losses included in net income, net of tax of $(90), $(153), $(271) and $(460), respectively	226	221	678	662
Other comprehensive income/ (loss)	(1,596)	(459)	(5,863)	2,384
Total comprehensive income	$ 26,144	$ 23,132	$ 73,161	$ 74,703

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Unrealized holding losses, tax	$ 788	$ 164	$ 2,869	$ (995)
Reclassification adjustment for gains included in net income, tax	17	369	54	416
Change in fair value of interest rate swaps, tax	(51)	(138)	(204)	(419)
Reclassification adjustments for prior period service costs and net losses included in net income, tax	$ (90)	$ (153)	$ (271)	$ (460)

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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, 2016		101,699,406
Balance beginning of the period at Dec. 31, 2016	$ 1,170,663	$ 1,017	$ 718,834	$ 478,803	$ (27,991)
Comprehensive income:
Net income	72,319			72,319
Other comprehensive income, net	2,384				2,384
Total comprehensive income	74,703			72,319	2,384
Exercise of stock options (in shares)		488,211
Exercise of stock options	5,616	$ 5	5,611
Stock-based compensation expense (in shares)		378,050
Stock-based compensation expense, including tax benefit	3,722	$ 4	3,718
Dividends paid, per share amount	(48,857)			(48,857)
Balance end of period (in shares) at Sep. 30, 2017		102,565,667
Balance end of the period at Sep. 30, 2017	1,205,847	$ 1,026	728,163	502,265	(25,607)
Balance beginning of the period (in shares) at Jun. 30, 2017		102,478,146
Balance beginning of the period at Jun. 30, 2017	1,196,930	$ 1,025	726,036	495,017	(25,148)
Comprehensive income:
Net income	23,591			23,591
Other comprehensive income, net	(459)				(459)
Total comprehensive income	23,132			23,591	(459)
Exercise of stock options (in shares)		87,521
Exercise of stock options	1,034	$ 1	1,033
Stock-based compensation expense (in shares)		0
Stock-based compensation expense, including tax benefit	1,094	$ 0	1,094
Dividends paid, per share amount	(16,343)			(16,343)
Balance end of period (in shares) at Sep. 30, 2017		102,565,667
Balance end of the period at Sep. 30, 2017	1,205,847	$ 1,026	728,163	502,265	(25,607)
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	79,024			79,024
Other comprehensive income, net	(5,863)				(5,863)
Total comprehensive income	73,161			85,770	(12,609)
Exercise of stock options (in shares)		674,538
Exercise of stock options	7,602	$ 7	7,595
Stock-based compensation expense (in shares)		414,330
Stock-based compensation expense, including tax benefit	4,548	$ 4	4,544
Stock-based compensation forfeited (in shares)		(190,216)
Stock-based compensation forfeited	0	$ (5)	5
Dividends paid, per share amount	(52,359)			(52,359)
Balance end of period (in shares) at Sep. 30, 2018		103,293,480
Balance end of the period at Sep. 30, 2018	1,240,676	$ 1,033	742,863	541,469	(44,689)
Balance beginning of the period (in shares) at Jun. 30, 2018		103,122,890
Balance beginning of the period at Jun. 30, 2018	1,228,880	$ 1,031	739,673	531,269	(43,093)
Increase (Decrease) in Stockholders' Equity
Reclassification due to adoption of ASU No. 2018-02	(6,700)
Comprehensive income:
Net income	27,740			27,740
Other comprehensive income, net	(1,596)				(1,596)
Total comprehensive income	26,144			27,740	(1,596)
Exercise of stock options (in shares)		178,109
Exercise of stock options	1,920	$ 2	1,918
Stock-based compensation expense (in shares)		0
Stock-based compensation expense, including tax benefit	$ 1,272	$ 0	1,272
Stock-based compensation forfeited (in shares)	(7,519)
Stock-based compensation forfeited	$ 0	$ 0	0
Dividends paid, per share amount	(17,540)			(17,540)
Balance end of period (in shares) at Sep. 30, 2018		103,293,480
Balance end of the period at Sep. 30, 2018	$ 1,240,676	$ 1,033	$ 742,863	$ 541,469	$ (44,689)

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax	$ 664	$ 242	$ 2,448	$ (1,458)
Dividends paid, per share (in dollars per share)	$ 0.17	$ 0.16	$ 0.51	$ 0.48

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES:
Net income	$ 79,024	$ 72,319
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	16,540	13,226
Net (gain)/ loss on sale of assets	1,758	(1,443)
Net gain on sale of offices	0	(17,186)
Net depreciation, amortization and accretion	7,598	10,951
(Increase)/ decrease in other assets	(8,952)	20,968
Decrease in other liabilities	48	1,761
Net amortization on marketable securities	1,317	1,535
Noncash write-down of real estate owned	1,281	980
Deferred income tax expense	22	0
Origination of loans held for sale	(1,297)	(59,401)
Proceeds from sale of loans held for sale	4,501	68,041
Noncash compensation expense related to stock benefit plans	4,548	3,722
Net cash provided by operating activities	106,388	115,473
INVESTING ACTIVITIES:
Purchase of marketable securities held-to-maturity	0	(23,621)
Purchase of marketable securities available-for-sale	(215,242)	(210,111)
Proceeds from maturities and principal reductions of marketable securities held-to-maturity	5,439	11,625
Proceeds from maturities and principal reductions of marketable securities available-for-sale	179,640	144,846
Proceeds from sale of marketable securities available-for-sale	5,206	23,501
Proceeds from bank-owed life insurance	357	1,550
Loan originations	(2,256,146)	(2,050,885)
Proceeds from loan maturities and principal reductions	2,036,656	2,002,816
Net purchase of Federal Home Loan Bank stock	(3,719)	(594)
Proceeds from sale of real estate owned	5,082	3,687
Sale of real estate owned for investment, net	455	456
Purchase of premises and equipment	(3,438)	(1,242)
Net cash used in investing activities	(245,710)	(97,972)
FINANCING ACTIVITIES:
Increase/ (decrease) in deposits, net	126,964	(155,925)
Net increase/ (decrease) in short-term borrowings	70,879	(27,511)
Decrease in advances by borrowers for taxes and insurance	(17,528)	(15,015)
Cash dividends paid	(52,359)	(48,857)
Proceeds from stock options exercised	7,602	5,616
Net cash provided by/ (used in) financing activities	135,558	(241,692)
Net decrease in cash and cash equivalents	(3,764)	(224,191)
Cash and cash equivalents at beginning of period	77,710	389,867
Net decrease in cash and cash equivalents	(3,764)	(224,191)
Cash and cash equivalents at end of period	73,946	165,676
Cash paid during the period for:
Interest on deposits and borrowings (including interest credited to deposit accounts of $20,927 and $16,644, respectively)	26,036	20,875
Income taxes	19,299	20,705
Non-cash activities:
Loan foreclosures and repossessions	5,034	6,392
Sale of real estate owned financed by the Company	$ 183	$ 168

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Cash Flows [Abstract]
Interest on deposits and borrowings, interest credited to deposit accounts	$ 20,927	$ 16,644

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Basis of Presentation and Informational Disclosures

9 Months Ended

Sep. 30, 2018

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 172 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. 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, 2017 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 nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other period.

Stock-Based Compensation

On May 14, 2018, the Company awarded employees 831,160 stock options and directors 64,800 stock options with an exercise price of $16.59 and grant date fair value of $1.49 per stock option, and the Company awarded employees 390,030 restricted common shares and directors 24,300 restricted common shares with a grant date fair value of $16.59. 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 $1.3 million and $1.1 million for the quarters ended September 30, 2018 and 2017, and $4.5 million and $3.7 million for the nine months ended September 30, 2018 and 2017, respectively, was recognized in compensation expense relating to our stock benefit plans. At September 30, 2018 there was compensation expense of $4.3 million to be recognized for awarded but unvested stock options and $18.6 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 September 30, 2018 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, 2017, 2016 and 2015. 

Recently Adopted Accounting Standards

In May 2014 the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606)”. Effective January 1, 2018, we adopted the ASU and all related amendments to all contracts using the modified retrospective approach, with the cumulative effect recorded as an adjustment to opening retained earnings. Due to immateriality, we had no cumulative effect to record. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis.     

Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The services that fall within the scope of ASC 606 include service charges and fees, trust and other financial services income, insurance commission income, sale of OREO and other operating income.

Revenue is recognized when performance obligations under the terms of a contract with our customers are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The majority of our revenue continues to be recognized at the point in time when the services are provided to our customers.

Service charges and fees represents income earned on both loan and deposit accounts as well as interchange income. Service charges on deposit accounts primarily consist of overdraft, non-sufficient funds, ATM transaction fees and account management fees. Revenue is recognized at the point in time the transaction occurs or the service is provided to the customer. We earn interchange income from debit and credit cardholder transactions processed through payment networks. Interchange fees represent a percentage of the underlying transaction value and are generally set by the credit card associations. Interchange fees are recognized as transactions occur.

We provide trust management services and investment management services to our customers and recognize revenue as these management services are provided. Trust and investment management services are billed and paid on a monthly or quarterly basis. Additionally, we earn commissions on investment products that are sold to our customers. These commissions are recognized at the time of the sale of the third party’s product or services to our customers.

Our insurance subsidiary is an employee benefits and property and casualty insurance agency specializing in commercial and personal insurance as well as retirement benefit plans. Insurance commission income is earned at the time of sale of the third party’s product or service to our customers.

Loss on real estate owned represents gains and losses on real estate acquired by Northwest through the foreclosure process. Proceeds from the sale of these properties are recognized when control of the property transfers to the buyer. In certain instances the Bank may finance a portion of the purchase price paid by the buyer and an additional evaluation of whether all of the contract criteria are met is required. If it is not probable that we will collect substantially all of the consideration expected, the transaction would not be accounted for as a sale until the concerns about collectability are resolved.

Other operating income consists primarily of revenues earned for providing transaction services to our deposit customers. The revenue is earned at the point in time the transaction occurs.

We have evaluated the nature of our contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary.    

In January 2016 the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10)”. This guidance requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted this guidance as of January 1, 2018 which did not have a material impact on our results of operations and financial position. Additionally, this guidance requires entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. Accordingly, we refined the calculation used to determine the disclosed fair value of our loans held for investment portfolio as part of adopting this standard. The refined calculation did not have a significant impact on our fair value disclosures. Refer to note 9, "Disclosures About Fair Value of Financial Instruments".

In August 2016, the FASB issued ASU No. 2016-15, “Classification of Certain Cash Receipts and Cash Payments”. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This guidance is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We adopted this guidance as of January 1, 2018 and applied it on a retrospective basis. No material reclassifications were made for the nine months ended September 30, 2017 and we do not expect the reclassifications to be material for the full year.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". This guidance eliminates the requirement to determine the fair value of individual assets and liabilities of a reporting unit to measure goodwill impairment. Under this guidance goodwill impairment testing will be performed by comparing the fair value of the reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. This guidance is effective for annual and interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017.We have elected to early adopt this standard as of January 1, 2018 and the amendments were applied on a prospective basis. The adoption did not have a material impact on the consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, “Compensation Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Costs and Net Periodic Postretirement Benefit Costs". This guidance provides financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. This guidance is effective for annual and interim periods beginning after December 15, 2017 and should be applied retrospectively. We adopted this standard as of January 1, 2018. The other components of the net periodic benefit cost for the quarter and nine months ended September 30, 2017 totaled $517,000 and $1.6 million, respectively, and were reclassified from compensation and employee benefits to other expense.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This guidance permits a reclassification from accumulated other comprehensive income to retained earnings of the stranded tax effects resulting from the Tax Cuts and Jobs Act. This guidance is effective for annual or interim reporting periods beginning after December 15, 2018 but permits early adoption in a period for which financial statements have not been issued. We have elected to early adopt the ASU as of January 1, 2018. The reclassification from accumulated other comprehensive income to retained earnings was $6.7 million for the release of stranded income tax benefits relating to the unrealized net gains and losses on available for sale securities and the change in fair value of our interest rate swaps and our pension plan. Our policy for releasing income tax effects from accumulated other comprehensive income is to release them when investments are sold or matured and liabilities are extinguished.

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU 2016-2, “Leases”. This guidance requires a lessee to recognize in the statement of financial condition a liability to make lease payments and a right-of-use asset representing the right to use the underlying asset for the term of the lease. Optional periods should only be recognized if the lessee is reasonably certain to exercise the option. For leases with a term of twelve months or less, the lessee is permitted not to recognize lease assets and lease liabilities and should recognize lease expense for such leases generally on a straight-line basis over the term of the lease. This guidance is effective for annual periods beginning after December 15, 2018, including interim periods within those years and early adoption is permitted. We lease certain branch and office facilities or land under operating leases. While we are currently evaluating the impact this guidance will have on our results of operations and financial position, we expect the primary impact on the consolidated statement of financial position will be the recognition of right-of-use assets and lease obligations under the ASU as a result of our minimum commitments under non-cancellable operating leases. Our current minimum commitments under non-cancellable operating leases are disclosed in Note 7, “Premises and Equipment” in our Annual Report on Form 10-K for the year ended December 31, 2017. We expect to apply the package of practical expedients included therein, as well as utilize the transition method included in ASU 2018-11. By applying ASU 2016-02 at the adoption date, as opposed to at the beginning of the earliest period presented, our reporting for periods prior to January 1, 2019 will continue to be in accordance with Leases (Topic 840).

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 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 partnered 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.

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Investment securities and impairment of investment securities

9 Months Ended

Sep. 30, 2018

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 September 30, 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 after one year through five years	$	14,707	—	(12	)	14,695
Debt issued by government sponsored enterprises:
Due in one year or less	70,096		—	(895	)	69,201
Due after one year through five years	116,097		—	(2,560	)	113,537
Due after ten years	3,822		—	(115	)	3,707
Municipal securities:
Due in one year or less	2,351		3	(7	)	2,347
Due after one year through five years	3,553		43	(11	)	3,585
Due after five years through ten years	11,714		46	(23	)	11,737
Due after ten years	7,073		31	(29	)	7,075
Corporate debt issues:
Due after five years through ten years	912		—	—		912
Residential mortgage-backed securities:
Fixed rate pass-through	131,255		514	(5,689	)	126,080
Variable rate pass-through	26,374		1,064	(5	)	27,433
Fixed rate non-agency CMOs	—		—	—		—
Fixed rate agency CMOs	374,900		5	(10,595	)	364,310
Variable rate agency CMOs	66,491		467	(21	)	66,937
Total residential mortgage-backed securities	599,020		2,050	(16,310	)	584,760
Total marketable securities available-for-sale	$	829,345	2,173	(19,962	)	811,556

The following table shows the portfolio of investment securities available-for-sale at December 31, 2017 (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	$	1	—	—		1
Debt issued by government sponsored enterprises:
Due in one year or less	66,566		14	(289	)	66,291
Due after one year through five years	140,624		—	(2,402	)	138,222
Due after ten years	4,833		—	(77	)	4,756
Equity securities	551		29	(6	)	574
Municipal securities:
Due in one year or less	2,492		7	(1	)	2,498
Due after one year through five years	7,072		82	(6	)	7,148
Due after five years through ten years	14,576		171	—		14,747
Due after ten years	26,371		292	—		26,663
Corporate debt issues:
Due after ten years	909		—	—		909
Residential mortgage-backed securities:
Fixed rate pass-through	144,411		1,108	(2,817	)	142,702
Variable rate pass-through	33,079		1,464	(6	)	34,537
Fixed rate non-agency CMOs	15		—	—		15
Fixed rate agency CMOs	284,320		37	(5,271	)	279,086
Variable rate agency CMOs	74,274		249	(137	)	74,386
Total residential mortgage-backed securities	536,099		2,858	(8,231	)	530,726
Total marketable securities available-for-sale	$	800,094	3,453	(11,012	)	792,535

The following table shows the portfolio of investment securities held-to-maturity at September 30, 2018 (in thousands):

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,027	44	—		3,071
Variable rate pass-through	1,778		39	—		1,817
Fixed rate agency CMOs	18,753		—	(782	)	17,971
Variable rate agency CMOs	664		11	—		675
Total residential mortgage-backed securities	24,222		94	(782	)	23,534
Total marketable securities held-to-maturity	$	24,222	94	(782	)	23,534

The following table shows the portfolio of investment securities held-to-maturity at December 31, 2017 (in thousands): 

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,760	140	—		3,900
Variable rate pass-through	2,283		64	—		2,347
Fixed rate agency CMOs	22,906		20	(248	)	22,678
Variable rate agency CMOs	729		13	—		742
Total residential mortgage-backed securities	29,678		237	(248	)	29,667
Total marketable securities held-to-maturity	$	29,678	237	(248	)	29,667

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 September 30, 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	$	55,650	(210	)	130,795	(3,360	)	186,445	(3,570	)
Municipal securities	9,025		(70	)	—	—		9,025	(70	)
Residential mortgage-backed securities - agency	176,316		(2,095	)	329,287	(14,997	)	505,603	(17,092	)
U.S. government and agencies	14,695		(12	)	—	—		14,695	(12	)
Total temporarily impaired securities	$	255,686	(2,387	)	460,082	(18,357	)	715,768	(20,744	)

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, 2017 (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	$	5,006	(7	)	197,695	(2,761	)	202,701	(2,768	)
Equity Securities	—		—		544	(6	)	544	(6	)
Municipal Securities	4,563		(7	)	—	—		4,563	(7	)
Residential mortgage-backed securities - agency	239,703		(2,522	)	202,344	(5,957	)	442,047	(8,479	)
Total temporarily impaired securities	$	249,272	(2,536	)	400,583	(8,724	)	649,855	(11,260	)

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 and nine months ended September 30,:

	2018		2017
Beginning balance at July 1, (1)	$	—	7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—		—
Reduction for securities sold/ called realized during the quarter	—		—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—		—
Ending balance at September 30,	$	—	7,942

	2018			2017
Beginning balance at January 1, (1)	$	352		7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—			—
Reduction for losses realized during the quarter	(352		)	—
Reduction for securities sold/ called realized during the nine months	—			—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—			—
Ending balance at September 30,	$	—		7,942

(1) The beginning balance represents credit losses included in other-than-temporary impairment charges recognized on debt

securities in prior periods.

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Loans receivable

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans receivable

Loans receivable

 The following table shows a summary of our loans receivable at September 30, 2018 and December 31, 2017 (in thousands): 

	September 30, 2018							December 31, 2017
	Originated			Acquired		Total		Originated		Acquired		Total
Personal Banking:
Residential mortgage loans (1)	$	2,745,190		97,822		2,843,012		2,658,726		113,823		2,772,549
Home equity loans	1,048,373			223,972		1,272,345		1,051,558		258,797		1,310,355
Consumer finance loans (2)	5,888			—		5,888		18,619		—		18,619
Consumer loans	685,252			66,284		751,536		540,832		97,877		638,709
Total Personal Banking	4,484,703			388,078		4,872,781		4,269,735		470,497		4,740,232
Commercial Banking:
Commercial real estate loans	2,477,581			241,307		2,718,888		2,303,179		296,161		2,599,340
Commercial loans	594,939			51,164		646,103		572,341		60,822		633,163
Total Commercial Banking	3,072,520			292,471		3,364,991		2,875,520		356,983		3,232,503
Total loans receivable, gross	7,557,223			680,549		8,237,772		7,145,255		827,480		7,972,735
Deferred loan costs	32,846			936		33,782		26,255		1,527		27,782
Allowance for loan losses	(51,473		)	(4,502	)	(55,975	)	(50,572	)	(6,223	)	(56,795	)
Undisbursed loan proceeds:
Residential mortgage loans	(11,335		)	—		(11,335	)	(10,067	)	—		(10,067	)
Commercial real estate loans	(200,152		)	(670	)	(200,822	)	(141,967	)	(2,647	)	(144,614	)
Commercial loans	(62,175		)	(1,160	)	(63,335	)	(51,143	)	(1,284	)	(52,427	)
Total loans receivable, net	$	7,264,934		675,153		7,940,087		6,917,761		818,853		7,736,614

(1) Includes $0 and $3.1 million of loans held for sale at September 30, 2018 and December 31, 2017, respectively.

(2) Represents loans from our consumer finance subsidiary that was closed in 2017, which are no longer being originated.

Acquired loans were initially measured at fair value and subsequently accounted for under either Accounting Standards Codification (“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): 

	September 30, 2018		December 31, 2017
Acquired loans evaluated individually for future credit losses:
Outstanding principal balance	$	8,446	9,735
Carrying value	5,871		6,875
Acquired loans evaluated collectively for future credit losses:
Outstanding principal balance	678,540		824,205
Carrying value	673,784		818,201
Total acquired loans:
Outstanding principal balance	686,986		833,940
Carrying value	679,655		825,076

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, 2016	$	2,187
Accretion	(1,318		)
Net reclassification from nonaccretable yield	671
Balance at December 31, 2017	1,540
Accretion	(588		)
Net reclassification from nonaccretable yield	—
Balance at September 30, 2018	$	952

The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the nine months endedSeptember 30, 2018 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,099	1,741	13	1,140	135
Home equity loans	1,019		1,977	7	1,081	127
Consumer loans	32		95	4	46	31
Total Personal Banking	2,150		3,813	24	2,267	293
Commercial Banking:
Commercial real estate loans	3,643		4,548	1	4,015	287
Commercial loans	78		85	—	91	8
Total Commercial Banking	3,721		4,633	1	4,106	295
Total	$	5,871	8,446	25	6,373	588

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, 2017 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,182	1,880	24	1,251	181
Home equity loans	1,143		2,219	21	1,253	157
Consumer loans	59		160	4	97	51
Total Personal Banking	2,384		4,259	49	2,601	389
Commercial Banking:
Commercial real estate loans	4,388		5,363	39	6,992	914
Commercial loans	103		113	—	177	15
Total Commercial Banking	4,491		5,476	39	7,169	929
Total	$	6,875	9,735	88	9,770	1,318

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 September 30, 2018 (in thousands):               

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance June 30, 2018
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	491		(204	)	200	3,657
Home equity loans	3,234		(351	)	(323	)	69	3,839
Consumer finance loans	1,650		(437	)	(445	)	178	2,354
Consumer loans	11,021		4,023		(3,392	)	630	9,760
Total Personal Banking	20,049		3,726		(4,364	)	1,077	19,610
Commercial Banking:
Commercial real estate loans	25,694		8,723		(4,820	)	772	21,019
Commercial loans	5,730		(3,945	)	(914	)	80	10,509
Total Commercial Banking	31,424		4,778		(5,734	)	852	31,528
Total originated loans	51,473		8,504		(10,098	)	1,929	51,138
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(70	)	(10	)	12	170
Home equity loans	408		(173	)	(103	)	22	662
Consumer loans	444		(448	)	(78	)	55	915
Total Personal Banking	954		(691	)	(191	)	89	1,747
Commercial Banking:
Commercial real estate loans	2,876		(532	)	(39	)	25	3,422
Commercial loans	672		(299	)	(71	)	17	1,025
Total Commercial Banking	3,548		(831	)	(110	)	42	4,447
Total acquired loans	4,502		(1,522	)	(301	)	131	6,194
Total	$	55,975	6,982		(10,399	)	2,060	57,332

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 September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance June 30, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(462	)	(211	)	24	4,635
Home equity loans	3,295		615		(285	)	8	2,957
Consumer finance loans	4,876		4,220		(3,891	)	80	4,467
Consumer loans	7,383		4,594		(2,844	)	353	5,280
Total Personal Banking	19,540		8,967		(7,231	)	465	17,339
Commercial Banking:
Commercial real estate loans	20,174		(2,529	)	(163	)	282	22,584
Commercial loans	11,131		(5,445	)	(204	)	76	16,704
Total Commercial Banking	31,305		(7,974	)	(367	)	358	39,288
Total originated loans	50,845		993		(7,598	)	823	56,627
Acquired loans:
Personal Banking:
Residential mortgage loans	77		(11	)	(4	)	7	85
Home equity loans	748		324		(243	)	44	623
Consumer loans	594		106		(158	)	18	628
Total Personal Banking	1,419		419		(405	)	69	1,336
Commercial Banking:
Commercial real estate loans	3,301		2,433		(1,738	)	160	2,446
Commercial loans	1,362		(818	)	(305	)	9	2,476
Total Commercial Banking	4,663		1,615		(2,043	)	169	4,922
Total acquired loans	6,082		2,034		(2,448	)	238	6,258
Total	$	56,927	3,027		(10,046	)	1,061	62,885

The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2018 (in thousands):

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance December 31, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	678		(710	)	352	3,824
Home equity loans	3,234		(164	)	(866	)	192	4,072
Consumer finance loans	1,650		(469	)	(2,484	)	635	3,968
Other consumer loans	11,021		9,845		(9,192	)	1,893	8,475
Total Personal Banking	20,049		9,890		(13,252	)	3,072	20,339
Commercial Banking:
Commercial real estate loans	25,694		10,417		(5,702	)	1,068	19,911
Commercial loans	5,730		(2,912	)	(2,053	)	373	10,322
Total Commercial Banking	31,424		7,505		(7,755	)	1,441	30,233
Total originated loans	51,473		17,395		(21,007	)	4,513	50,572
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(38	)	(94	)	103	131
Home equity loans	408		85		(578	)	139	762
Other consumer loans	444		(363	)	(209	)	126	890
Total Personal Banking	954		(316	)	(881	)	368	1,783
Commercial Banking:
Commercial real estate loans	2,876		(688	)	(147	)	162	3,549
Commercial loans	672		149		(448	)	80	891
Total Commercial Banking	3,548		(539	)	(595	)	242	4,440
Total acquired loans	4,502		(855	)	(1,476	)	610	6,223
Total	$	55,975	16,540		(22,483	)	5,123	56,795

The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance December 31, 2016
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(278	)	(678	)	286	4,656
Home equity loans	3,295		503		(803	)	109	3,486
Consumer finance loans	4,876		6,610		(5,469	)	290	3,445
Other consumer loans	7,383		9,741		(7,912	)	1,025	4,529
Total Personal Banking	19,540		16,576		(14,862	)	1,710	16,116
Commercial Banking:
Commercial real estate loans	20,174		(3,988	)	(498	)	993	23,667
Commercial loans	11,131		(3,517	)	(1,858	)	996	15,510
Total Commercial Banking	31,305		(7,505	)	(2,356	)	1,989	39,177
Total originated loans	50,845		9,071		(17,218	)	3,699	55,293
Acquired loans:
Personal Banking:
Residential mortgage loans	77		130		(199	)	75	71
Home equity loans	748		512		(1,063	)	252	1,047
Other consumer loans	594		405		(689	)	225	653
Total Personal Banking	1,419		1,047		(1,951	)	552	1,771
Commercial Banking:
Commercial real estate loans	3,301		1,832		(2,206	)	667	3,008
Commercial loans	1,362		1,276		(847	)	66	867
Total Commercial Banking	4,663		3,108		(3,053	)	733	3,875
Total acquired loans	6,082		4,155		(5,004	)	1,285	5,646
Total	$	56,927	13,226		(22,222	)	4,984	60,939

The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at September 30, 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	$	2,846,834	4,246	14,585	—	7,668	778	—
Home equity loans	1,272,345		3,642	7,085	72	2,061	497	4
Consumer finance loans	5,888		1,650	39	—	—	—	—
Consumer loans	770,161		11,465	4,307	123	—	—	—
Total Personal Banking	4,895,228		21,003	26,016	195	9,729	1,275	4
Commercial Banking:
Commercial real estate loans	2,518,066		28,570	43,023	—	15,667	1,516	208
Commercial loans	582,768		6,402	5,188	—	3,751	276	209
Total Commercial Banking	3,100,834		34,972	48,211	—	19,418	1,792	417
Total	$	7,996,062	55,975	74,227	195	29,147	3,067	421

(1) Includes $9.8 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, 2017 (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	$	2,776,203	3,955	14,791	—	8,000	815	—
Home equity loans	1,310,355		4,834	8,907	120	1,716	462	4
Consumer finance loans	18,619		3,968	199	3	—	—	—
Consumer loans	652,770		9,365	4,673	379	—	—	—
Total Personal Banking	4,757,947		22,122	28,570	502	9,716	1,277	4
Commercial Banking:
Commercial real estate loans	2,454,726		23,460	28,473	—	15,691	1,125	235
Commercial loans	580,736		11,213	7,412	—	6,697	742	8
Total Commercial Banking	3,035,462		34,673	35,885	—	22,388	1,867	243
Total	$	7,793,409	56,795	64,455	502	32,104	3,144	247

(1) Includes $12.3 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 nine months endedSeptember 30, 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	$	13,154	1,431	505	6,349	21,439	20,499	659
Home equity loans	5,838		1,247	—	1,812	8,897	9,250	375
Consumer finance loan	39		—	—	—	39	25	4
Consumer loans	3,535		772	—	—	4,307	3,835	166
Total Personal Banking	22,566		3,450	505	8,161	34,682	33,609	1,204
Commercial Banking:
Commercial real estate loans	27,122		15,901	22,583	5,114	70,720	39,985	1,195
Commercial loans	2,714		2,474	223	2,305	7,716	8,910	392
Total Commercial Banking	29,836		18,375	22,806	7,419	78,436	48,895	1,587
Total	$	52,402	21,825	23,311	15,580	113,118	82,504	2,791

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, 2017 (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	$	13,509	1,282	—	6,814	21,605	21,531	892
Home equity loans	7,251		1,656	—	1,449	10,356	9,150	452
Consumer finance loans	199		—	—	—	199	379	20
Consumer loans	3,617		1,056	—	—	4,673	4,042	188
Total Personal Banking	24,576		3,994	—	8,263	36,833	35,102	1,552
Commercial Banking:
Commercial real estate loans	15,361		13,112	4,431	4,123	37,027	49,981	1,758
Commercial loans	3,140		4,272	906	2,447	10,765	12,110	672
Total Commercial Banking	18,501		17,384	5,337	6,570	47,792	62,091	2,430
Total	$	43,077	21,378	5,337	14,833	84,625	97,193	3,982

At September 30, 2018, 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 September 30, 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	$	2,838,600	8,234	8,234	795	—
Home equity loans	1,270,284		2,061	2,061	497	—
Consumer finance loans	5,888		—	—	—	—
Consumer loans	770,125		36	36	7	—
Total Personal Banking	4,884,897		10,331	10,331	1,299	—
Commercial Banking:
Commercial real estate loans	2,462,663		55,403	27,924	2,877	27,479
Commercial loans	577,023		5,745	4,328	475	1,417
Total Commercial Banking	3,039,686		61,148	32,252	3,352	28,896
Total	$	7,924,583	71,479	42,583	4,651	28,896

The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2017 (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	$	2,767,635	8,568	8,568	816	—
Home equity loans	1,308,639		1,716	1,716	461	—
Consumer finance loans	18,619		—	—	—	—
Consumer loans	652,685		85	85	25	—
Total Personal Banking	4,747,578		10,369	10,369	1,302	—
Commercial Banking:
Commercial real estate loans	2,433,755		20,971	18,470	1,859	2,501
Commercial loans	571,412		9,324	8,572	829	752
Total Commercial Banking	3,005,167		30,295	27,042	2,688	3,253
Total	$	7,752,745	40,664	37,411	3,990	3,253

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 premium or discount), 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 table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the quarter ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	30,662		203	$	41,860
New TDRs	7	647			6	546
Re-modified TDRs	3	306			2	265
Net paydowns		(1,215		)		(987		)
Charge-offs:
Residential mortgage loans	—	—			—	—
Home equity loans	—	—			—	—
Commercial real estate loans	1	(91		)	2	(2,498		)
Commercial loans	5	(619		)	—	—
Paid-off loans:
Residential mortgage loans	2	(2		)	—	—
Home equity loans	2	(12		)	3	(30		)
Commercial real estate loans	2	(360		)	1	(564		)
Commercial loans	3	(169		)	2	(123		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the nine months ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	32,104		225	$	42,926
New TDRs	26	6,443			13	4,685
Re-modified TDRs	3	306			3	710
Net paydowns		(3,037		)		(3,668		)
Charge-offs:
Residential mortgage loans	1	(135		)	—	—
Home equity loans	—	—			—	—
Commercial real estate loans	2	(294		)	2	(2,498		)
Commercial loans	6	(1,340		)	6	(259		)
Paid-off loans:
Residential mortgage loans	4	(257		)	—	—
Home equity loans	4	(59		)	8	(62		)
Commercial real estate loans	9	(2,183		)	11	(1,109		)
Commercial loans	8	(2,401		)	10	(2,256		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

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 (dollars in thousands):

	For the quarter ended September 30, 2018					For the nine months ended September 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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	342	342	35	6	$	616	612	62
Home equity loans	4	194		193	47	12	511		462	113
Total Personal Banking	6	536		535	82	18	1,127		1,074	175
Commercial Banking:
Commercial real estate loans	3	372		361	42	5	3,255		3,198	97
Commercial loans	1	45		45	5	6	2,367		1,484	21
Total Commercial Banking	4	417		406	47	11	5,622		4,682	118
Total	10	$	953	941	129	29	$	6,749	5,756	293

During the quarter and nine months ended September 30, 2018, no TDRs modified within the previous twelve months have subsequently defaulted.

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 (dollars in thousands):

	For the quarter ended September 30, 2017					For the nine months ended September 30, 2017
	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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	403	402	40	5	$	1,297	1,276	128
Home equity loans	2	122		119	30	2	122		119	30
Total Personal Banking	4	525		521	70	7	1,419		1,395	158
Commercial Banking:
Commercial real estate loans	2	114		116	13	6	3,600		3,282	285
Commercial loans	2	172		170	71	3	376		352	84
Total Commercial Banking	4	286		286	84	9	3,976		3,634	369
Total	8	$	811	807	154	16	$	5,395	5,029	527
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Personal Banking:
Residential mortgage loans	—	$	—	—	—	—	$	—	—	—
Home equity loans	—	—		—	—	—	—		—	—
Total Personal Banking	—	—		—	—	—	—		—	—
Commercial Banking:
Commercial real estate loans	1	90		90	11	1	90		90	11
Commercial loans	1	150		150	70	1	150		150	70
Total Commercial Banking	2	240		240	81	2	240		240	81
Total	2	$	240	240	81	2	$	240	240	81

The following table provides information as of September 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 September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	—	—	342		342
Home equity loans	4	193		—	—		193
Total Personal Banking	6	193		—	342	—	535
Commercial Banking:
Commercial real estate loans	3	—		—	361		361
Commercial loans	1	—		—	45		45
Total Commercial Banking	4	—		—	406	—	406
Total	10	$	193	—	748	—	941

The following table provides information as of September 30, 2017 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 September 30, 2017 (dollars in thousands): 

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	250	—	—	152	402
Home equity loans	2	119		—	—	—	119
Total Personal Banking	4	369		—	—	152	521
Commercial Banking:
Commercial real estate loans	2	—		—	116	—	116
Commercial loans	2	—		—	170	—	170
Total Commercial Banking	4	—		—	286	—	286
Total	8	$	369	—	286	152	807

The following table provides information as of September 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 nine months ended September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	6	$	7	—	519	86	612
Home equity loans	12	222		—	47	193	462
Total Personal Banking	18	229		—	566	279	1,074
Commercial Banking:
Commercial real estate loans	5	—		482	361	2,355	3,198
Commercial loans	6	—		—	183	1,301	1,484
Total Commercial Banking	11	—		482	544	3,656	4,682
Total	29	$	229	482	1,110	3,935	5,756

The following table provides information as of September 30, 2017 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2017 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	5	$	360	—	—	916	1,276
Home equity loans	2	119		—	—	—	119
Total Personal Banking	7	479		—	—	916	1,395
Commercial Banking:
Commercial real estate loans	6	—		2,710	572	—	3,282
Commercial loans	3	—		—	352	—	352
Total Commercial Banking	9	—		2,710	924	—	3,634
Total	16	$	479	2,710	924	916	5,029

During the nine months ended September 30, 2018, three commercial banking TDRs were re-modified. During the nine months ended September 30, 2017, three personal banking TDRs were re-modified.

The following table provides information related to loan payment delinquencies at September 30, 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 greater delinquent and accruing (1)
Originated loans:
Personal Banking:
Residential mortgage loans	$	1,404	4,392	11,695	17,491	2,731,521	2,749,012	—
Home equity loans	4,622		2,118	5,013	11,753	1,036,620	1,048,373	—
Consumer finance loans	632		234	39	905	4,983	5,888	—
Consumer loans	7,893		3,032	3,166	14,091	688,850	702,941	—
Total Personal Banking	14,551		9,776	19,913	44,240	4,461,974	4,506,214	—
Commercial Banking:
Commercial real estate loans	2,329		5,370	21,771	29,470	2,247,959	2,277,429	—
Commercial loans	340		807	2,112	3,259	529,505	532,764	—
Total Commercial Banking	2,669		6,177	23,883	32,729	2,777,464	2,810,193	—
Total originated loans	17,220		15,953	43,796	76,969	7,239,438	7,316,407	—
Acquired loans:
Personal Banking:
Residential mortgage loans	96		312	1,788	2,196	95,626	97,822	329
Home equity loans	1,051		418	825	2,294	221,678	223,972	—
Consumer loans	515		219	375	1,109	66,111	67,220	6
Total Personal Banking	1,662		949	2,988	5,599	383,415	389,014	335
Commercial Banking:
Commercial real estate loans	3,057		1,308	5,457	9,822	230,815	240,637	106
Commercial loans	282		297	602	1,181	48,823	50,004	—
Total Commercial Banking	3,339		1,605	6,059	11,003	279,638	290,641	106
Total acquired loans	5,001		2,554	9,047	16,602	663,053	679,655	441
Total loans	$	22,221	18,507	52,843	93,571	7,902,491	7,996,062	441

(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, 2017 (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	$	23,786	6,030	12,613	42,429	2,619,951	2,662,380	—
Home equity loans	6,094		2,333	6,043	14,470	1,037,088	1,051,558	—
Consumer finance loans	2,128		1,113	199	3,440	15,179	18,619	—
Consumer loans	9,762		2,834	3,274	15,870	537,496	553,366	—
Total Personal Banking	41,770		12,310	22,129	76,209	4,209,714	4,285,923	—
Commercial Banking:
Commercial real estate loans	5,520		2,133	10,629	18,282	2,142,930	2,161,212	—
Commercial loans	1,469		204	2,806	4,479	516,719	521,198	—
Total Commercial Banking	6,989		2,337	13,435	22,761	2,659,649	2,682,410	—
Total originated loan	48,759		14,647	35,564	98,970	6,869,363	6,968,333	—
Acquired loans:
Personal Banking:
Residential mortgage loans	1,998		205	1,277	3,480	110,343	113,823	381
Home equity loans	1,367		538	1,306	3,211	255,586	258,797	98
Consumer loans	1,150		517	353	2,020	97,384	99,404	10
Total Personal Banking	4,515		1,260	2,936	8,711	463,313	472,024	489
Commercial Banking:
Commercial real estate loans	2,795		406	5,655	8,856	284,658	293,514	923
Commercial loans	396		237	334	967	58,571	59,538	—
Total Commercial Banking	3,191		643	5,989	9,823	343,229	353,052	923
Total acquired loan	7,706		1,903	8,925	18,534	806,542	825,076	1,412
Total	$	56,465	16,550	44,489	117,504	7,675,905	7,793,409	1,412

(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 quarter ended September 30, 2018 (in thousands): 

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,739,243	—	9,769	—	—	2,749,012
Home equity loans	1,042,627		—	5,746	—	—	1,048,373
Consumer finance loans	5,849		—	39	—	—	5,888
Consumer loans	699,033		—	3,908	—	—	702,941
Total Personal Banking	4,486,752		—	19,462	—	—	4,506,214
Commercial Banking:
Commercial real estate loans	2,083,302		47,983	146,144	—	—	2,277,429
Commercial loans	487,143		21,120	24,501	—	—	532,764
Total Commercial Banking	2,570,445		69,103	170,645	—	—	2,810,193
Total originated loans	7,057,197		69,103	190,107	—	—	7,316,407
Acquired loans:
Personal Banking:
Residential mortgage loans	96,563		—	1,259	—	—	97,822
Home equity loans	222,610		—	1,362	—	—	223,972
Consumer loans	66,673		—	547	—	—	67,220
Total Personal Banking	385,846		—	3,168	—	—	389,014
Commercial Banking:
Commercial real estate loans	199,850		5,546	35,241	—	—	240,637
Commercial loans	39,441		3,640	6,923	—	—	50,004
Total Commercial Banking	239,291		9,186	42,164	—	—	290,641
Total acquired loans	625,137		9,186	45,332	—	—	679,655
Total loans	$	7,682,334	78,289	235,439	—	—	7,996,062

The following table sets forth information about credit quality indicators, which were updated during the year ended December 31, 2017 (in thousands):

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,645,475	—	16,905	—	—	2,662,380
Home equity loans	1,042,965		—	8,593	—	—	1,051,558
Consumer finance loans	18,420		—	199	—	—	18,619
Consumer loans	549,550		—	3,816	—	—	553,366
Total Personal Banking	4,256,410		—	29,513	—	—	4,285,923
Commercial Banking:
Commercial real estate loans	1,964,565		78,699	117,948	—	—	2,161,212
Commercial loans	461,962		15,510	43,726	—	—	521,198
Total Commercial Banking	2,426,527		94,209	161,674	—	—	2,682,410
Total originated loans	6,682,937		94,209	191,187	—	—	6,968,333
Acquired loans:
Personal Banking:
Residential mortgage loans	112,990		—	833	—	—	113,823
Home equity loans	257,312		—	1,485	—	—	258,797
Consumer loans	98,659		—	745	—	—	99,404
Total Personal Banking	468,961		—	3,063	—	—	472,024
Commercial Banking:
Commercial real estate loans	251,761		4,838	36,915	—	—	293,514
Commercial loans	49,073		3,787	6,678	—	—	59,538
Total Commercial Banking	300,834		8,625	43,593	—	—	353,052
Total acquired loans	769,795		8,625	46,656	—	—	825,076
Total	$	7,452,732	102,834	237,843	—	—	7,793,409

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Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The following table provides information for intangible assets subject to amortization at the dates indicated (in thousands):

	September 30, 2018			December 31, 2017
Amortizable intangible assets:
Core deposit intangibles — gross	$	63,685		63,685
Less: accumulated amortization	(43,886		)	(40,029	)
Core deposit intangibles — net	19,799			23,656
Customer and Contract intangible assets — gross	10,474			10,474
Less: accumulated amortization	(9,106		)	(8,461	)
Customer and Contract intangible assets — net	$	1,368		2,013

The following table shows the actual aggregate amortization expense for the quarters ended September 30, 2018 and 2017, as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for the current fiscal year and each of the five succeeding fiscal years (in thousands): 

For the quarter ended September 30, 2018	$	1,462
For the quarter ended September 30, 2017	1,691
For the nine months ended September 30, 2018	4,502
For the nine months ended September 30, 2017	5,189
For the year ending December 31, 2018	5,848
For the year ending December 31, 2019	4,933
For the year ending December 31, 2020	4,017
For the year ending December 31, 2021	3,188
For the year ending December 31, 2022	2,456
For the year ending December 31, 2023	1,847

The following table provides information for the changes in the carrying amount of goodwill (in thousands):

	Total
Balance at December 31, 2016	$	307,420
Goodwill from acquisition	—
Balance at December 31, 2017	307,420
Goodwill from acquisition	—
Balance at September 30, 2018	$	307,420

We performed our annual goodwill impairment test as of June 30, 2018 using Accounting Standard Codification 350, ("Step 0"), as updated by ASU 2017-04 and concluded that goodwill was not impaired. As of September 30, 2018, there were no changes in our operations that would cause us to update that goodwill impairment test.

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Borrowed Funds

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Borrowed Funds

Borrowed Funds

Borrowings

Borrowings from the Federal Home Loan Bank of Pittsburgh ("FHLB"), if any, are secured by our residential first mortgage and other qualifying loans. Certain of these borrowings are subject to restrictions or penalties in the event of prepayment.

The revolving line of credit with the FHLB carries a commitment of $150.0 million. The rate is adjusted daily by the FHLB, and any borrowings on this line may be repaid at any time without penalty. At September 30, 2018 and December 31, 2017 the balance of the revolving line of credit was $85.2 million and $0, respectively.

At September 30, 2018 and December 31, 2017 collateralized borrowings, due within one year, were $91.8 million, and $108.2 million, respectively. These borrowings are collateralized by cash or various securities held in safekeeping by the FHLB.

Trust Preferred Securities

We have 3 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 September 30, 2018 was 3.78%. 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 September 30, 2018 was 3.71%. 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 September 30, 2018 was 3.81%.

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 5 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.

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Guarantees

9 Months Ended

Sep. 30, 2018

Guarantees [Abstract]

Guarantees

Guarantees

We issue standby letters of credit in the normal course of business.  Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party.  Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party.  We are required to perform under a standby letter of credit when drawn upon by the guaranteed third party in the case of nonperformance by our customer.  The credit risk associated with standby letters of credit is essentially the same as that involved in extending loans to customers and is subject to normal loan underwriting procedures. Collateral may be obtained based on management’s credit assessment of the customer.  At September 30, 2018, the maximum potential amount of future payments we could be required to make under these non-recourse standby letters of credit was $33.8 million, of which $27.3 million is fully collateralized.  At September 30, 2018, we had a liability, which represents deferred income, of $133,000 related to the standby letters of credit.

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Earnings Per Share

9 Months Ended

Sep. 30, 2018

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 September 30, 2018 and 2017, 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 $18.01 and $16.26, respectively. All stock options outstanding during the nine months ended September 30, 2018 and 2017, 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 $17.30 and $16.58, respectively.

The computation of basic and diluted earnings per share follows (in thousands, except share data and per share amounts): 

	Quarter ended September 30,			Nine months ended September 30,
	2018		2017	2018	2017
Reported net income	$	27,740	23,591	79,024	72,319
Weighted average common shares outstanding	102,334,954		101,163,534	101,937,338	100,921,322
Dilutive potential shares due to effect of stock options	1,607,741		1,400,942	1,566,731	1,617,020
Total weighted average common shares and dilutive potential shares	103,942,695		102,564,476	103,504,069	102,538,342
Basic earnings per share:	$	0.27	0.23	0.78	0.72
Diluted earnings per share:	$	0.27	0.23	0.76	0.71

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Pension and Other Post-retirement Benefits

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Pension and Other Post-retirement Benefits

Pension and Other Post-retirement Benefits

The following table sets forth the net periodic costs for the defined benefit pension plans and post retirement healthcare plans for the periods indicated (in thousands):

	Quarter ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	1,716		1,537		—	—
Interest cost	1,678			1,719		14	17
Expected return on plan assets	(2,992		)	(2,628	)	—	—
Amortization of prior service cost	(581		)	(580	)	—	—
Amortization of the net loss	872			928		24	27
Net periodic cost	$	693		976		38	44

	Nine months ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	5,148		4,612		—	—
Interest cost	5,034			5,159		41	51
Expected return on plan assets	(8,976		)	(7,884	)	—	—
Amortization of prior service cost	(1,742		)	(1,742	)	—	—
Amortization of the net loss	2,617			2,783		73	81
Net periodic cost	$	2,081		2,928		114	132

We anticipate making a contribution to our defined benefit pension plan of $4.0 million to $6.0 million during the year ending December 31, 2018.

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Disclosures About Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2018

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 on hand, interest-earning deposits in other institutions, federal funds sold and other short term investments, 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.

Equity securities - available for sale - Publicly traded securities valued using quoted market prices are classified as Level 1.  We consider the financial condition of the issuer to determine if the securities have indicators of impairment.

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 Sale

The estimated fair value of loans held for sale is based on market bids obtained from potential buyers.

Loans Held for Investment

With the adoption of ASU 2016-01 on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the guidance, which was applied on a prospective basis resulting in prior-periods no longer being comparable.

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.

Federal Home Loan Bank (“FHLB”) Stock

Due to the restrictions placed on transferability, FHLB stock is classified as Level 3.

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 ("swaps")

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 September 30, 2018 and December 31, 2017, there was no significant unrealized appreciation or depreciation on these financial instruments.

The following table sets forth the carrying amount and estimated fair value of our financial instruments included in the consolidated statement of financial condition at September 30, 2018 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	73,946	73,946	73,946	—	—
Securities available-for-sale	811,556		811,556	—	811,556	—
Securities held-to-maturity	24,222		23,534	—	23,534	—
Loans receivable, net	7,940,087		7,721,559	—	—	7,721,559
Accrued interest receivable	25,798		25,798	25,798	—	—
Interest rate swaps	4,386		4,386	—	4,386	—
FHLB Stock	15,452		15,452	—	—	15,452
Total financial assets	$	8,895,447	8,676,231	99,744	839,476	7,737,011
Financial liabilities:
Savings and checking deposits	$	6,550,748	6,550,748	6,550,748	—	—
Time deposits	1,403,205		1,431,500	—	—	1,431,500
Borrowed funds	179,117		179,111	179,111	—	—
Junior subordinated debentures	111,213		104,609	—	—	104,609
Interest rate swaps	4,479		4,479	—	4,479	—
Accrued interest payable	627		627	627	—	—
Total financial liabilities	$	8,249,389	8,271,074	6,730,486	4,479	1,536,109

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, 2017 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	77,710	77,710	77,710	—	—
Securities available-for-sale	792,535		792,535	574	791,961	—
Securities held-to-maturity	29,678		29,667	—	29,667	—
Loans receivable, net	7,736,614		7,762,562	3,128	—	7,759,434
Accrued Interest Receivable	23,352		23,352	23,352	—	—
Interest rate swaps	214		214	—	214	—
FHLB Stock	11,733		11,733	—	—	11,733
Total financial assets	$	8,671,836	8,697,773	104,764	821,842	7,771,167
Financial liabilities:
Savings and checking accounts	$	6,414,366	6,414,366	6,414,366	—	—
Time deposits	1,412,623		1,433,380	—	—	1,433,380
Borrowed funds	108,238		108,238	108,238	—	—
Junior subordinated debentures	111,213		110,954	—	—	110,954
Interest rate swaps	1,278		1,278	—	1,278	—
Foreign exchange swaps	61		61	—	61	—
Accrued interest payable	460		460	460	—	—
Total financial liabilities	$	8,048,239	8,068,737	6,523,064	1,339	1,544,334

Fair value estimates are made at a point-in-time, based on relevant market data and information about the instrument. The methods and assumptions detailed above were used in estimating the fair value of financial instruments at both September 30, 2018 and December 31, 2017.  There were no transfers of financial instruments between Level 1 and Level 2 during the quarter ended September 30, 2018.

The following table represents assets and liabilities measured at fair value on a recurring basis at September 30, 2018 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Debt securities:
U.S. government and agencies	$	—	14,695	—	14,695
Government sponsored enterprises	—		186,445	—	186,445
States and political subdivisions	—		24,744	—	24,744
Corporate	—		912	—	912
Total debt securities	—		226,796	—	226,796
Residential mortgage-backed securities:
GNMA	—		27,820	—	27,820
FNMA	—		71,251	—	71,251
FHLMC	—		53,907	—	53,907
Non-agency	—		535	—	535
Collateralized mortgage obligations:
GNMA	—		53,969	—	53,969
FNMA	—		205,066	—	205,066
FHLMC	—		172,212	—	172,212
Non-agency	—		—	—	—
Total mortgage-backed securities	—		584,760	—	584,760
Interest rate swaps	—		4,386	—	4,386
Total Assets	$	—	815,942	—	815,942
Interest rate swaps	$	—	4,479	—	4,479
Total Liabilities	$	—	4,479	—	4,479

The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2017 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Equity securities	$	574	—	—	574
Debt securities:
U.S. government and agencies	—		1	—	1
Government sponsored enterprises	—		209,269	—	209,269
States and political subdivisions	—		51,056	—	51,056
Corporate	—		909	—	909
Total debt securities	—		261,235	—	261,235
Residential mortgage-backed securities:
GNMA	—		29,695	—	29,695
FNMA	—		82,969	—	82,969
FHLMC	—		64,021	—	64,021
Non-agency	—		555	—	555
Collateralized mortgage obligations:
GNMA	—		4,769	—	4,769
FNMA	—		191,512	—	191,512
FHLMC	—		157,190	—	157,190
Non-agency	—		15	—	15
Total mortgage-backed securities	—		530,726	—	530,726
Interest rate swaps	—		214	—	214
Total Assets	$	574	792,175	—	792,749
Interest rate swaps	$	—	1,278	—	1,278
Foreign exchange swaps	—		61	—	61
Total Liabilities	$	—	1,339	—	1,339

The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the periods indicated (in thousands): 

	Quarter ended			Nine months ended
	September 30, 2018		September 30, 2017	September 30, 2018	September 30, 2017
Beginning balance January 1,	$	—	10,638	—	9,366
Total net realized investment gains/ (losses) and net change in unrealized appreciation/ (depreciation):
Included in net income as OTTI	—		—	—	—
Included in other comprehensive income	—		21	—	1,293
Purchases	—		—	—	—
Sales	—		—	—	—
Transfers in to Level 3	—		—	—	—
Transfers out of Level 3	—		—	—	—
Ending balance September 30,	$	—	10,659	—	10,659

Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans held

for sale, loans measured for impairment, real estate owned, and 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 September 30, 2018 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	37,932	37,932
Real estate owned	—		—	2,486	2,486
Total assets	$	—	—	40,418	40,418

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, 2017 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	33,421	33,421
Real estate owned	—		—	5,666	5,666
Total assets	$	—	—	39,087	39,087

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 2017 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 table presents additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at September 30, 2018 (dollar amounts in thousands): 

	Fair value	Valuation techniques	Significant unobservable inputs	Range (weighted average)
Loans measured for impairment	37,932	Appraisal value (1)	Estimated cost to sell	10.0%
		Discounted cash flow	Discount rate	4.25% to 10.0% (7.50%)
Real estate owned	2,486	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.

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2018

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

We are currently a counterparty to one interest rate swap agreement ("swap") which is designated as a cash flow hedge.  The swap is intended to protect against the variability of cash flows associated with Northwest Bancorp Capital Trust IV and modifies its re-pricing characteristics, wherein for 10 years expiring in December 2018, the Company receives interest of three-month LIBOR from a counterparty and pays a fixed rate of 4.09% to the same counterparty calculated on a notional amount of $25.0 million. The swap agreement was entered into with a counterparty that met our credit standards and the agreement contains collateral provisions protecting the at-risk party.  We believe that the credit risk inherent in the contract is not significant. At September 30, 2018, $255,000 of cash was pledged as collateral to the counterparty.

This cash flow hedge is recorded within other liabilities on the consolidated statement of financial condition at their estimated fair value. At September 30, 2018, the fair value of the swap agreements was $(93,000). There was no material hedge ineffectiveness for the swap discussed above.

Derivatives Not Designated as Hedging Instruments

In addition to our derivatives designated in hedge relationships, 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:

	Asset Derivatives			Liability Derivatives
	Notional Amount		Fair Value	Notional Amount	Fair Value
At September 30, 2018
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	25,000	93
Derivatives not designed as hedging instruments:
Interest rate swap agreements	209,353		4,386	209,353	4,386
Total derivatives	$	209,353	4,386	234,353	4,479
At December 31, 2017
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	50,000	1,064
Derivatives not designed as hedging instruments:
Interest rate swap agreements	92,631		214	92,631	214
Foreign exchange swap agreements	—		—	12,344	61
Total derivatives	$	92,631	214	154,975	1,339

The following table presents income or expense recognized on derivatives for the periods indicated:

	For the quarter ended September 30,		For the nine months ended September 30,
	2018	2017	2018		2017
Hedging interest rate derivatives:
Increase in interest expense	257	393	857		1,216
Non-hedging swap derivatives:
Increase/ (decrease) in other income	—	99	(288	)	333

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Legal Proceedings

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Legal Proceedings

Legal Proceedings

We establish accruals for legal proceedings when information related to the loss contingencies represented by those matters indicates both that a loss is probable and that the amount of loss can be reasonably estimated. As of September 30, 2018 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.

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Changes in Accumulated Other Comprehensive Income/ (Loss)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Changes in Accumulated Other Comprehensive Income/ (Loss)

Changes in Accumulated Other Comprehensive Income/ (Loss)

The following table shows the changes in accumulated other comprehensive income by component for the periods indicated (in thousands): 

	For the quarter ended September 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 June 30, 2018	$	(10,693	)	(266	)	(32,134	)	(43,093	)
Other comprehensive income/ (loss) before reclassification adjustments	(1,970		)	192		—		(1,778	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(44		)	—		226		182
Net other comprehensive income/ (loss)	(2,014		)	192		226		(1,596	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the quarter ended September 30, 2017
	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 June 30, 2017	$	2,276		(1,257	)	(26,167	)	(25,148	)
Other comprehensive income before reclassification adjustments	(264		)	258		—		(6	)
Amounts reclassified from accumulated other comprehensive income (3), (4)	(674		)	—		221		(453	)
Net other comprehensive income	(938		)	258		221		(459	)
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gain on securities (gain on sales of investments, net) of $61, net of tax (income tax expense) of $(17).

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $581 and amortization of net loss (compensation and employee benefits) of $(897), net of tax (income tax expense) of $90.

(3) Consists of realized gain on securities (gain on sales of investments, net) of $1,043, net of tax (income tax expense) of $(369).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $(954), net of tax (income tax expense) of $153. 

	For the nine months ended September 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	(7,169		)	766		—		(6,403	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(138		)	—		678		540
Net other comprehensive income/ (loss)	(7,307		)	766		678		(5,863	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the nine months ended September 30, 2017
	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, 2016	$	395		(1,778	)	(26,608	)	(27,991	)
Other comprehensive income before reclassification adjustments	1,684			779		—		2,463
Amounts reclassified from accumulated other comprehensive income (3), (4)	(741		)	—		662		(79	)
Net other comprehensive income	943			779		662		2,384
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gains on securities (loss on sales of investments, net) of $192, net of tax (income tax expense) of $54.

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742and amortization of net loss (compensation and employee benefits) of $(2,691), net of tax (income tax expense) of $271.

(3) Consists of realized gains on securities (gain on sales of investments, net) of $1,157, net of tax (income tax expense) of $(416).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742 and amortization of net loss (compensation and employee benefits) of $(2,864), net of tax (income tax expense) of $460.

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Basis of Presentation and Informational Disclosures (Policies)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Income Taxes - Uncertain Tax Positions

Income Taxes- Uncertain Tax Positions

Accounting standards prescribe a comprehensive model for how a company should recognize, measure, present and disclose in its financial statements uncertain tax positions that the company has taken or expects to take on a tax return.  A tax benefit from an uncertain position may be recognized only if it is “more likely than not” that the position is sustainable, based on its technical merits.  The tax benefit of a qualifying position is the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority having full knowledge of all relevant information.  At September 30, 2018 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, 2017, 2016 and 2015. 

Recently Adopted Accounting Standards and Impact of New Accounting Standards

Recently Adopted Accounting Standards

In May 2014 the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606)”. Effective January 1, 2018, we adopted the ASU and all related amendments to all contracts using the modified retrospective approach, with the cumulative effect recorded as an adjustment to opening retained earnings. Due to immateriality, we had no cumulative effect to record. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis.     

Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The services that fall within the scope of ASC 606 include service charges and fees, trust and other financial services income, insurance commission income, sale of OREO and other operating income.

Revenue is recognized when performance obligations under the terms of a contract with our customers are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. The majority of our revenue continues to be recognized at the point in time when the services are provided to our customers.

Service charges and fees represents income earned on both loan and deposit accounts as well as interchange income. Service charges on deposit accounts primarily consist of overdraft, non-sufficient funds, ATM transaction fees and account management fees. Revenue is recognized at the point in time the transaction occurs or the service is provided to the customer. We earn interchange income from debit and credit cardholder transactions processed through payment networks. Interchange fees represent a percentage of the underlying transaction value and are generally set by the credit card associations. Interchange fees are recognized as transactions occur.

We provide trust management services and investment management services to our customers and recognize revenue as these management services are provided. Trust and investment management services are billed and paid on a monthly or quarterly basis. Additionally, we earn commissions on investment products that are sold to our customers. These commissions are recognized at the time of the sale of the third party’s product or services to our customers.

Our insurance subsidiary is an employee benefits and property and casualty insurance agency specializing in commercial and personal insurance as well as retirement benefit plans. Insurance commission income is earned at the time of sale of the third party’s product or service to our customers.

Loss on real estate owned represents gains and losses on real estate acquired by Northwest through the foreclosure process. Proceeds from the sale of these properties are recognized when control of the property transfers to the buyer. In certain instances the Bank may finance a portion of the purchase price paid by the buyer and an additional evaluation of whether all of the contract criteria are met is required. If it is not probable that we will collect substantially all of the consideration expected, the transaction would not be accounted for as a sale until the concerns about collectability are resolved.

Other operating income consists primarily of revenues earned for providing transaction services to our deposit customers. The revenue is earned at the point in time the transaction occurs.

We have evaluated the nature of our contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary.    

In January 2016 the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10)”. This guidance requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted this guidance as of January 1, 2018 which did not have a material impact on our results of operations and financial position. Additionally, this guidance requires entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. Accordingly, we refined the calculation used to determine the disclosed fair value of our loans held for investment portfolio as part of adopting this standard. The refined calculation did not have a significant impact on our fair value disclosures. Refer to note 9, "Disclosures About Fair Value of Financial Instruments".

In August 2016, the FASB issued ASU No. 2016-15, “Classification of Certain Cash Receipts and Cash Payments”. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This guidance is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We adopted this guidance as of January 1, 2018 and applied it on a retrospective basis. No material reclassifications were made for the nine months ended September 30, 2017 and we do not expect the reclassifications to be material for the full year.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". This guidance eliminates the requirement to determine the fair value of individual assets and liabilities of a reporting unit to measure goodwill impairment. Under this guidance goodwill impairment testing will be performed by comparing the fair value of the reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. This guidance is effective for annual and interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017.We have elected to early adopt this standard as of January 1, 2018 and the amendments were applied on a prospective basis. The adoption did not have a material impact on the consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, “Compensation Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Costs and Net Periodic Postretirement Benefit Costs". This guidance provides financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. This guidance is effective for annual and interim periods beginning after December 15, 2017 and should be applied retrospectively. We adopted this standard as of January 1, 2018. The other components of the net periodic benefit cost for the quarter and nine months ended September 30, 2017 totaled $517,000 and $1.6 million, respectively, and were reclassified from compensation and employee benefits to other expense.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This guidance permits a reclassification from accumulated other comprehensive income to retained earnings of the stranded tax effects resulting from the Tax Cuts and Jobs Act. This guidance is effective for annual or interim reporting periods beginning after December 15, 2018 but permits early adoption in a period for which financial statements have not been issued. We have elected to early adopt the ASU as of January 1, 2018. The reclassification from accumulated other comprehensive income to retained earnings was $6.7 million for the release of stranded income tax benefits relating to the unrealized net gains and losses on available for sale securities and the change in fair value of our interest rate swaps and our pension plan. Our policy for releasing income tax effects from accumulated other comprehensive income is to release them when investments are sold or matured and liabilities are extinguished.

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU 2016-2, “Leases”. This guidance requires a lessee to recognize in the statement of financial condition a liability to make lease payments and a right-of-use asset representing the right to use the underlying asset for the term of the lease. Optional periods should only be recognized if the lessee is reasonably certain to exercise the option. For leases with a term of twelve months or less, the lessee is permitted not to recognize lease assets and lease liabilities and should recognize lease expense for such leases generally on a straight-line basis over the term of the lease. This guidance is effective for annual periods beginning after December 15, 2018, including interim periods within those years and early adoption is permitted. We lease certain branch and office facilities or land under operating leases. While we are currently evaluating the impact this guidance will have on our results of operations and financial position, we expect the primary impact on the consolidated statement of financial position will be the recognition of right-of-use assets and lease obligations under the ASU as a result of our minimum commitments under non-cancellable operating leases. Our current minimum commitments under non-cancellable operating leases are disclosed in Note 7, “Premises and Equipment” in our Annual Report on Form 10-K for the year ended December 31, 2017. We expect to apply the package of practical expedients included therein, as well as utilize the transition method included in ASU 2018-11. By applying ASU 2016-02 at the adoption date, as opposed to at the beginning of the earliest period presented, our reporting for periods prior to January 1, 2019 will continue to be in accordance with Leases (Topic 840).

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 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 partnered 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.

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Investment securities and impairment of investment securities (Tables)

9 Months Ended

Sep. 30, 2018

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 September 30, 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 after one year through five years	$	14,707	—	(12	)	14,695
Debt issued by government sponsored enterprises:
Due in one year or less	70,096		—	(895	)	69,201
Due after one year through five years	116,097		—	(2,560	)	113,537
Due after ten years	3,822		—	(115	)	3,707
Municipal securities:
Due in one year or less	2,351		3	(7	)	2,347
Due after one year through five years	3,553		43	(11	)	3,585
Due after five years through ten years	11,714		46	(23	)	11,737
Due after ten years	7,073		31	(29	)	7,075
Corporate debt issues:
Due after five years through ten years	912		—	—		912
Residential mortgage-backed securities:
Fixed rate pass-through	131,255		514	(5,689	)	126,080
Variable rate pass-through	26,374		1,064	(5	)	27,433
Fixed rate non-agency CMOs	—		—	—		—
Fixed rate agency CMOs	374,900		5	(10,595	)	364,310
Variable rate agency CMOs	66,491		467	(21	)	66,937
Total residential mortgage-backed securities	599,020		2,050	(16,310	)	584,760
Total marketable securities available-for-sale	$	829,345	2,173	(19,962	)	811,556

The following table shows the portfolio of investment securities available-for-sale at December 31, 2017 (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	$	1	—	—		1
Debt issued by government sponsored enterprises:
Due in one year or less	66,566		14	(289	)	66,291
Due after one year through five years	140,624		—	(2,402	)	138,222
Due after ten years	4,833		—	(77	)	4,756
Equity securities	551		29	(6	)	574
Municipal securities:
Due in one year or less	2,492		7	(1	)	2,498
Due after one year through five years	7,072		82	(6	)	7,148
Due after five years through ten years	14,576		171	—		14,747
Due after ten years	26,371		292	—		26,663
Corporate debt issues:
Due after ten years	909		—	—		909
Residential mortgage-backed securities:
Fixed rate pass-through	144,411		1,108	(2,817	)	142,702
Variable rate pass-through	33,079		1,464	(6	)	34,537
Fixed rate non-agency CMOs	15		—	—		15
Fixed rate agency CMOs	284,320		37	(5,271	)	279,086
Variable rate agency CMOs	74,274		249	(137	)	74,386
Total residential mortgage-backed securities	536,099		2,858	(8,231	)	530,726
Total marketable securities available-for-sale	$	800,094	3,453	(11,012	)	792,535

Schedule of the portfolio of investment securities held-to-maturity

The following table shows the portfolio of investment securities held-to-maturity at September 30, 2018 (in thousands):

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,027	44	—		3,071
Variable rate pass-through	1,778		39	—		1,817
Fixed rate agency CMOs	18,753		—	(782	)	17,971
Variable rate agency CMOs	664		11	—		675
Total residential mortgage-backed securities	24,222		94	(782	)	23,534
Total marketable securities held-to-maturity	$	24,222	94	(782	)	23,534

The following table shows the portfolio of investment securities held-to-maturity at December 31, 2017 (in thousands): 

	Amortized cost		Gross unrealized holding gains	Gross unrealized holding losses		Fair value
Residential mortgage-backed securities:
Fixed rate pass-through	$	3,760	140	—		3,900
Variable rate pass-through	2,283		64	—		2,347
Fixed rate agency CMOs	22,906		20	(248	)	22,678
Variable rate agency CMOs	729		13	—		742
Total residential mortgage-backed securities	29,678		237	(248	)	29,667
Total marketable securities held-to-maturity	$	29,678	237	(248	)	29,667

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 September 30, 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	$	55,650	(210	)	130,795	(3,360	)	186,445	(3,570	)
Municipal securities	9,025		(70	)	—	—		9,025	(70	)
Residential mortgage-backed securities - agency	176,316		(2,095	)	329,287	(14,997	)	505,603	(17,092	)
U.S. government and agencies	14,695		(12	)	—	—		14,695	(12	)
Total temporarily impaired securities	$	255,686	(2,387	)	460,082	(18,357	)	715,768	(20,744	)

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, 2017 (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	$	5,006	(7	)	197,695	(2,761	)	202,701	(2,768	)
Equity Securities	—		—		544	(6	)	544	(6	)
Municipal Securities	4,563		(7	)	—	—		4,563	(7	)
Residential mortgage-backed securities - agency	239,703		(2,522	)	202,344	(5,957	)	442,047	(8,479	)
Total temporarily impaired securities	$	249,272	(2,536	)	400,583	(8,724	)	649,855	(11,260	)

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 and nine months ended September 30,:

	2018		2017
Beginning balance at July 1, (1)	$	—	7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—		—
Reduction for securities sold/ called realized during the quarter	—		—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—		—
Ending balance at September 30,	$	—	7,942

	2018			2017
Beginning balance at January 1, (1)	$	352		7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—			—
Reduction for losses realized during the quarter	(352		)	—
Reduction for securities sold/ called realized during the nine months	—			—
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	—			—
Ending balance at September 30,	$	—		7,942

(1) The beginning balance represents credit losses included in other-than-temporary impairment charges recognized on debt

securities in prior periods.

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Loans receivable (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Summary of loans receivable

The following table shows a summary of our loans receivable at September 30, 2018 and December 31, 2017 (in thousands): 

	September 30, 2018							December 31, 2017
	Originated			Acquired		Total		Originated		Acquired		Total
Personal Banking:
Residential mortgage loans (1)	$	2,745,190		97,822		2,843,012		2,658,726		113,823		2,772,549
Home equity loans	1,048,373			223,972		1,272,345		1,051,558		258,797		1,310,355
Consumer finance loans (2)	5,888			—		5,888		18,619		—		18,619
Consumer loans	685,252			66,284		751,536		540,832		97,877		638,709
Total Personal Banking	4,484,703			388,078		4,872,781		4,269,735		470,497		4,740,232
Commercial Banking:
Commercial real estate loans	2,477,581			241,307		2,718,888		2,303,179		296,161		2,599,340
Commercial loans	594,939			51,164		646,103		572,341		60,822		633,163
Total Commercial Banking	3,072,520			292,471		3,364,991		2,875,520		356,983		3,232,503
Total loans receivable, gross	7,557,223			680,549		8,237,772		7,145,255		827,480		7,972,735
Deferred loan costs	32,846			936		33,782		26,255		1,527		27,782
Allowance for loan losses	(51,473		)	(4,502	)	(55,975	)	(50,572	)	(6,223	)	(56,795	)
Undisbursed loan proceeds:
Residential mortgage loans	(11,335		)	—		(11,335	)	(10,067	)	—		(10,067	)
Commercial real estate loans	(200,152		)	(670	)	(200,822	)	(141,967	)	(2,647	)	(144,614	)
Commercial loans	(62,175		)	(1,160	)	(63,335	)	(51,143	)	(1,284	)	(52,427	)
Total loans receivable, net	$	7,264,934		675,153		7,940,087		6,917,761		818,853		7,736,614

(1) Includes $0 and $3.1 million of loans held for sale at September 30, 2018 and December 31, 2017, respectively.

(2) Represents loans from our consumer finance subsidiary that was closed in 2017, which 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): 

	September 30, 2018		December 31, 2017
Acquired loans evaluated individually for future credit losses:
Outstanding principal balance	$	8,446	9,735
Carrying value	5,871		6,875
Acquired loans evaluated collectively for future credit losses:
Outstanding principal balance	678,540		824,205
Carrying value	673,784		818,201
Total acquired loans:
Outstanding principal balance	686,986		833,940
Carrying value	679,655		825,076

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, 2016	$	2,187
Accretion	(1,318		)
Net reclassification from nonaccretable yield	671
Balance at December 31, 2017	1,540
Accretion	(588		)
Net reclassification from nonaccretable yield	—
Balance at September 30, 2018	$	952

Schedule of the composition of impaired loans by portfolio segment and by class of financing receivable

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 nine months endedSeptember 30, 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	$	13,154	1,431	505	6,349	21,439	20,499	659
Home equity loans	5,838		1,247	—	1,812	8,897	9,250	375
Consumer finance loan	39		—	—	—	39	25	4
Consumer loans	3,535		772	—	—	4,307	3,835	166
Total Personal Banking	22,566		3,450	505	8,161	34,682	33,609	1,204
Commercial Banking:
Commercial real estate loans	27,122		15,901	22,583	5,114	70,720	39,985	1,195
Commercial loans	2,714		2,474	223	2,305	7,716	8,910	392
Total Commercial Banking	29,836		18,375	22,806	7,419	78,436	48,895	1,587
Total	$	52,402	21,825	23,311	15,580	113,118	82,504	2,791

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, 2017 (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	$	13,509	1,282	—	6,814	21,605	21,531	892
Home equity loans	7,251		1,656	—	1,449	10,356	9,150	452
Consumer finance loans	199		—	—	—	199	379	20
Consumer loans	3,617		1,056	—	—	4,673	4,042	188
Total Personal Banking	24,576		3,994	—	8,263	36,833	35,102	1,552
Commercial Banking:
Commercial real estate loans	15,361		13,112	4,431	4,123	37,027	49,981	1,758
Commercial loans	3,140		4,272	906	2,447	10,765	12,110	672
Total Commercial Banking	18,501		17,384	5,337	6,570	47,792	62,091	2,430
Total	$	43,077	21,378	5,337	14,833	84,625	97,193	3,982

The following table provides information related to acquired impaired loans by portfolio segment and by class of financing receivable at and for the nine months endedSeptember 30, 2018 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,099	1,741	13	1,140	135
Home equity loans	1,019		1,977	7	1,081	127
Consumer loans	32		95	4	46	31
Total Personal Banking	2,150		3,813	24	2,267	293
Commercial Banking:
Commercial real estate loans	3,643		4,548	1	4,015	287
Commercial loans	78		85	—	91	8
Total Commercial Banking	3,721		4,633	1	4,106	295
Total	$	5,871	8,446	25	6,373	588

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, 2017 (in thousands):

	Carrying value		Outstanding principal balance	Related impairment reserve	Average recorded investment in impaired loans	Interest income recognized
Personal Banking:
Residential mortgage loans	$	1,182	1,880	24	1,251	181
Home equity loans	1,143		2,219	21	1,253	157
Consumer loans	59		160	4	97	51
Total Personal Banking	2,384		4,259	49	2,601	389
Commercial Banking:
Commercial real estate loans	4,388		5,363	39	6,992	914
Commercial loans	103		113	—	177	15
Total Commercial Banking	4,491		5,476	39	7,169	929
Total	$	6,875	9,735	88	9,770	1,318

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 nine months ended September 30, 2018 (in thousands):

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance December 31, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	678		(710	)	352	3,824
Home equity loans	3,234		(164	)	(866	)	192	4,072
Consumer finance loans	1,650		(469	)	(2,484	)	635	3,968
Other consumer loans	11,021		9,845		(9,192	)	1,893	8,475
Total Personal Banking	20,049		9,890		(13,252	)	3,072	20,339
Commercial Banking:
Commercial real estate loans	25,694		10,417		(5,702	)	1,068	19,911
Commercial loans	5,730		(2,912	)	(2,053	)	373	10,322
Total Commercial Banking	31,424		7,505		(7,755	)	1,441	30,233
Total originated loans	51,473		17,395		(21,007	)	4,513	50,572
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(38	)	(94	)	103	131
Home equity loans	408		85		(578	)	139	762
Other consumer loans	444		(363	)	(209	)	126	890
Total Personal Banking	954		(316	)	(881	)	368	1,783
Commercial Banking:
Commercial real estate loans	2,876		(688	)	(147	)	162	3,549
Commercial loans	672		149		(448	)	80	891
Total Commercial Banking	3,548		(539	)	(595	)	242	4,440
Total acquired loans	4,502		(855	)	(1,476	)	610	6,223
Total	$	55,975	16,540		(22,483	)	5,123	56,795

The following table provides information related to the allowance for loan losses by portfolio segment and by class of financing receivable for the nine months ended September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance December 31, 2016
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(278	)	(678	)	286	4,656
Home equity loans	3,295		503		(803	)	109	3,486
Consumer finance loans	4,876		6,610		(5,469	)	290	3,445
Other consumer loans	7,383		9,741		(7,912	)	1,025	4,529
Total Personal Banking	19,540		16,576		(14,862	)	1,710	16,116
Commercial Banking:
Commercial real estate loans	20,174		(3,988	)	(498	)	993	23,667
Commercial loans	11,131		(3,517	)	(1,858	)	996	15,510
Total Commercial Banking	31,305		(7,505	)	(2,356	)	1,989	39,177
Total originated loans	50,845		9,071		(17,218	)	3,699	55,293
Acquired loans:
Personal Banking:
Residential mortgage loans	77		130		(199	)	75	71
Home equity loans	748		512		(1,063	)	252	1,047
Other consumer loans	594		405		(689	)	225	653
Total Personal Banking	1,419		1,047		(1,951	)	552	1,771
Commercial Banking:
Commercial real estate loans	3,301		1,832		(2,206	)	667	3,008
Commercial loans	1,362		1,276		(847	)	66	867
Total Commercial Banking	4,663		3,108		(3,053	)	733	3,875
Total acquired loans	6,082		4,155		(5,004	)	1,285	5,646
Total	$	56,927	13,226		(22,222	)	4,984	60,939

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 September 30, 2018 (in thousands):               

	Balance September 30, 2018		Current period provision		Charge-offs		Recoveries	Balance June 30, 2018
Originated loans:
Personal Banking:
Residential mortgage loans	$	4,144	491		(204	)	200	3,657
Home equity loans	3,234		(351	)	(323	)	69	3,839
Consumer finance loans	1,650		(437	)	(445	)	178	2,354
Consumer loans	11,021		4,023		(3,392	)	630	9,760
Total Personal Banking	20,049		3,726		(4,364	)	1,077	19,610
Commercial Banking:
Commercial real estate loans	25,694		8,723		(4,820	)	772	21,019
Commercial loans	5,730		(3,945	)	(914	)	80	10,509
Total Commercial Banking	31,424		4,778		(5,734	)	852	31,528
Total originated loans	51,473		8,504		(10,098	)	1,929	51,138
Acquired loans:
Personal Banking:
Residential mortgage loans	102		(70	)	(10	)	12	170
Home equity loans	408		(173	)	(103	)	22	662
Consumer loans	444		(448	)	(78	)	55	915
Total Personal Banking	954		(691	)	(191	)	89	1,747
Commercial Banking:
Commercial real estate loans	2,876		(532	)	(39	)	25	3,422
Commercial loans	672		(299	)	(71	)	17	1,025
Total Commercial Banking	3,548		(831	)	(110	)	42	4,447
Total acquired loans	4,502		(1,522	)	(301	)	131	6,194
Total	$	55,975	6,982		(10,399	)	2,060	57,332

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 September 30, 2017 (in thousands):

	Balance September 30, 2017		Current period provision		Charge-offs		Recoveries	Balance June 30, 2017
Originated loans:
Personal Banking:
Residential mortgage loans	$	3,986	(462	)	(211	)	24	4,635
Home equity loans	3,295		615		(285	)	8	2,957
Consumer finance loans	4,876		4,220		(3,891	)	80	4,467
Consumer loans	7,383		4,594		(2,844	)	353	5,280
Total Personal Banking	19,540		8,967		(7,231	)	465	17,339
Commercial Banking:
Commercial real estate loans	20,174		(2,529	)	(163	)	282	22,584
Commercial loans	11,131		(5,445	)	(204	)	76	16,704
Total Commercial Banking	31,305		(7,974	)	(367	)	358	39,288
Total originated loans	50,845		993		(7,598	)	823	56,627
Acquired loans:
Personal Banking:
Residential mortgage loans	77		(11	)	(4	)	7	85
Home equity loans	748		324		(243	)	44	623
Consumer loans	594		106		(158	)	18	628
Total Personal Banking	1,419		419		(405	)	69	1,336
Commercial Banking:
Commercial real estate loans	3,301		2,433		(1,738	)	160	2,446
Commercial loans	1,362		(818	)	(305	)	9	2,476
Total Commercial Banking	4,663		1,615		(2,043	)	169	4,922
Total acquired loans	6,082		2,034		(2,448	)	238	6,258
Total	$	56,927	3,027		(10,046	)	1,061	62,885

Schedule of loan portfolio by portfolio segment and by class of financing receivable

The following table provides information related to the loan portfolio by portfolio segment and by class of financing receivable at September 30, 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	$	2,846,834	4,246	14,585	—	7,668	778	—
Home equity loans	1,272,345		3,642	7,085	72	2,061	497	4
Consumer finance loans	5,888		1,650	39	—	—	—	—
Consumer loans	770,161		11,465	4,307	123	—	—	—
Total Personal Banking	4,895,228		21,003	26,016	195	9,729	1,275	4
Commercial Banking:
Commercial real estate loans	2,518,066		28,570	43,023	—	15,667	1,516	208
Commercial loans	582,768		6,402	5,188	—	3,751	276	209
Total Commercial Banking	3,100,834		34,972	48,211	—	19,418	1,792	417
Total	$	7,996,062	55,975	74,227	195	29,147	3,067	421

(1) Includes $9.8 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, 2017 (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	$	2,776,203	3,955	14,791	—	8,000	815	—
Home equity loans	1,310,355		4,834	8,907	120	1,716	462	4
Consumer finance loans	18,619		3,968	199	3	—	—	—
Consumer loans	652,770		9,365	4,673	379	—	—	—
Total Personal Banking	4,757,947		22,122	28,570	502	9,716	1,277	4
Commercial Banking:
Commercial real estate loans	2,454,726		23,460	28,473	—	15,691	1,125	235
Commercial loans	580,736		11,213	7,412	—	6,697	742	8
Total Commercial Banking	3,035,462		34,673	35,885	—	22,388	1,867	243
Total	$	7,793,409	56,795	64,455	502	32,104	3,144	247

(1) Includes $12.3 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 September 30, 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	$	2,838,600	8,234	8,234	795	—
Home equity loans	1,270,284		2,061	2,061	497	—
Consumer finance loans	5,888		—	—	—	—
Consumer loans	770,125		36	36	7	—
Total Personal Banking	4,884,897		10,331	10,331	1,299	—
Commercial Banking:
Commercial real estate loans	2,462,663		55,403	27,924	2,877	27,479
Commercial loans	577,023		5,745	4,328	475	1,417
Total Commercial Banking	3,039,686		61,148	32,252	3,352	28,896
Total	$	7,924,583	71,479	42,583	4,651	28,896

The following table provides information related to the evaluation of impaired loans by portfolio segment and by class of financing receivable at December 31, 2017 (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	$	2,767,635	8,568	8,568	816	—
Home equity loans	1,308,639		1,716	1,716	461	—
Consumer finance loans	18,619		—	—	—	—
Consumer loans	652,685		85	85	25	—
Total Personal Banking	4,747,578		10,369	10,369	1,302	—
Commercial Banking:
Commercial real estate loans	2,433,755		20,971	18,470	1,859	2,501
Commercial loans	571,412		9,324	8,572	829	752
Total Commercial Banking	3,005,167		30,295	27,042	2,688	3,253
Total	$	7,752,745	40,664	37,411	3,990	3,253

Schedule of roll forward of troubled debt restructurings

The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the quarter ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	30,662		203	$	41,860
New TDRs	7	647			6	546
Re-modified TDRs	3	306			2	265
Net paydowns		(1,215		)		(987		)
Charge-offs:
Residential mortgage loans	—	—			—	—
Home equity loans	—	—			—	—
Commercial real estate loans	1	(91		)	2	(2,498		)
Commercial loans	5	(619		)	—	—
Paid-off loans:
Residential mortgage loans	2	(2		)	—	—
Home equity loans	2	(12		)	3	(30		)
Commercial real estate loans	2	(360		)	1	(564		)
Commercial loans	3	(169		)	2	(123		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

The following table provides a roll forward of troubled debt restructurings for the periods indicated (dollars in thousands):

	For the nine months ended September 30,
	2018				2017
	Number of contracts	Amount			Number of contracts	Amount
Beginning TDR balance:	205	$	32,104		225	$	42,926
New TDRs	26	6,443			13	4,685
Re-modified TDRs	3	306			3	710
Net paydowns		(3,037		)		(3,668		)
Charge-offs:
Residential mortgage loans	1	(135		)	—	—
Home equity loans	—	—			—	—
Commercial real estate loans	2	(294		)	2	(2,498		)
Commercial loans	6	(1,340		)	6	(259		)
Paid-off loans:
Residential mortgage loans	4	(257		)	—	—
Home equity loans	4	(59		)	8	(62		)
Commercial real estate loans	9	(2,183		)	11	(1,109		)
Commercial loans	8	(2,401		)	10	(2,256		)
Ending TDR balance:	197	$	29,147		201	$	38,469
Accruing TDRs		$	19,370			$	20,660
Non-accrual TDRs		9,777				17,809

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 (dollars in thousands):

	For the quarter ended September 30, 2018					For the nine months ended September 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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	342	342	35	6	$	616	612	62
Home equity loans	4	194		193	47	12	511		462	113
Total Personal Banking	6	536		535	82	18	1,127		1,074	175
Commercial Banking:
Commercial real estate loans	3	372		361	42	5	3,255		3,198	97
Commercial loans	1	45		45	5	6	2,367		1,484	21
Total Commercial Banking	4	417		406	47	11	5,622		4,682	118
Total	10	$	953	941	129	29	$	6,749	5,756	293

During the quarter and nine months ended September 30, 2018, no TDRs modified within the previous twelve months have subsequently defaulted.

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 (dollars in thousands):

	For the quarter ended September 30, 2017					For the nine months ended September 30, 2017
	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
Troubled debt restructurings:
Personal Banking:
Residential mortgage loans	2	$	403	402	40	5	$	1,297	1,276	128
Home equity loans	2	122		119	30	2	122		119	30
Total Personal Banking	4	525		521	70	7	1,419		1,395	158
Commercial Banking:
Commercial real estate loans	2	114		116	13	6	3,600		3,282	285
Commercial loans	2	172		170	71	3	376		352	84
Total Commercial Banking	4	286		286	84	9	3,976		3,634	369
Total	8	$	811	807	154	16	$	5,395	5,029	527
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Personal Banking:
Residential mortgage loans	—	$	—	—	—	—	$	—	—	—
Home equity loans	—	—		—	—	—	—		—	—
Total Personal Banking	—	—		—	—	—	—		—	—
Commercial Banking:
Commercial real estate loans	1	90		90	11	1	90		90	11
Commercial loans	1	150		150	70	1	150		150	70
Total Commercial Banking	2	240		240	81	2	240		240	81
Total	2	$	240	240	81	2	$	240	240	81

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 September 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 September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	—	—	342		342
Home equity loans	4	193		—	—		193
Total Personal Banking	6	193		—	342	—	535
Commercial Banking:
Commercial real estate loans	3	—		—	361		361
Commercial loans	1	—		—	45		45
Total Commercial Banking	4	—		—	406	—	406
Total	10	$	193	—	748	—	941

The following table provides information as of September 30, 2017 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 September 30, 2017 (dollars in thousands): 

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	2	$	250	—	—	152	402
Home equity loans	2	119		—	—	—	119
Total Personal Banking	4	369		—	—	152	521
Commercial Banking:
Commercial real estate loans	2	—		—	116	—	116
Commercial loans	2	—		—	170	—	170
Total Commercial Banking	4	—		—	286	—	286
Total	8	$	369	—	286	152	807

The following table provides information as of September 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 nine months ended September 30, 2018 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	6	$	7	—	519	86	612
Home equity loans	12	222		—	47	193	462
Total Personal Banking	18	229		—	566	279	1,074
Commercial Banking:
Commercial real estate loans	5	—		482	361	2,355	3,198
Commercial loans	6	—		—	183	1,301	1,484
Total Commercial Banking	11	—		482	544	3,656	4,682
Total	29	$	229	482	1,110	3,935	5,756

The following table provides information as of September 30, 2017 for troubled debt restructurings (including re-modified TDRs) by type of modification, by portfolio segment and class of financing receivable for modifications during the nine months ended September 30, 2017 (dollars in thousands):

		Type of modification
	Number of contracts	Rate		Payment	Maturity date	Other	Total
Personal Banking:
Residential mortgage loans	5	$	360	—	—	916	1,276
Home equity loans	2	119		—	—	—	119
Total Personal Banking	7	479		—	—	916	1,395
Commercial Banking:
Commercial real estate loans	6	—		2,710	572	—	3,282
Commercial loans	3	—		—	352	—	352
Total Commercial Banking	9	—		2,710	924	—	3,634
Total	16	$	479	2,710	924	916	5,029

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 September 30, 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 greater delinquent and accruing (1)
Originated loans:
Personal Banking:
Residential mortgage loans	$	1,404	4,392	11,695	17,491	2,731,521	2,749,012	—
Home equity loans	4,622		2,118	5,013	11,753	1,036,620	1,048,373	—
Consumer finance loans	632		234	39	905	4,983	5,888	—
Consumer loans	7,893		3,032	3,166	14,091	688,850	702,941	—
Total Personal Banking	14,551		9,776	19,913	44,240	4,461,974	4,506,214	—
Commercial Banking:
Commercial real estate loans	2,329		5,370	21,771	29,470	2,247,959	2,277,429	—
Commercial loans	340		807	2,112	3,259	529,505	532,764	—
Total Commercial Banking	2,669		6,177	23,883	32,729	2,777,464	2,810,193	—
Total originated loans	17,220		15,953	43,796	76,969	7,239,438	7,316,407	—
Acquired loans:
Personal Banking:
Residential mortgage loans	96		312	1,788	2,196	95,626	97,822	329
Home equity loans	1,051		418	825	2,294	221,678	223,972	—
Consumer loans	515		219	375	1,109	66,111	67,220	6
Total Personal Banking	1,662		949	2,988	5,599	383,415	389,014	335
Commercial Banking:
Commercial real estate loans	3,057		1,308	5,457	9,822	230,815	240,637	106
Commercial loans	282		297	602	1,181	48,823	50,004	—
Total Commercial Banking	3,339		1,605	6,059	11,003	279,638	290,641	106
Total acquired loans	5,001		2,554	9,047	16,602	663,053	679,655	441
Total loans	$	22,221	18,507	52,843	93,571	7,902,491	7,996,062	441

(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 September 30, 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 greater delinquent and accruing (1)
Originated loans:
Personal Banking:
Residential mortgage loans	$	1,404	4,392	11,695	17,491	2,731,521	2,749,012	—
Home equity loans	4,622		2,118	5,013	11,753	1,036,620	1,048,373	—
Consumer finance loans	632		234	39	905	4,983	5,888	—
Consumer loans	7,893		3,032	3,166	14,091	688,850	702,941	—
Total Personal Banking	14,551		9,776	19,913	44,240	4,461,974	4,506,214	—
Commercial Banking:
Commercial real estate loans	2,329		5,370	21,771	29,470	2,247,959	2,277,429	—
Commercial loans	340		807	2,112	3,259	529,505	532,764	—
Total Commercial Banking	2,669		6,177	23,883	32,729	2,777,464	2,810,193	—
Total originated loans	17,220		15,953	43,796	76,969	7,239,438	7,316,407	—
Acquired loans:
Personal Banking:
Residential mortgage loans	96		312	1,788	2,196	95,626	97,822	329
Home equity loans	1,051		418	825	2,294	221,678	223,972	—
Consumer loans	515		219	375	1,109	66,111	67,220	6
Total Personal Banking	1,662		949	2,988	5,599	383,415	389,014	335
Commercial Banking:
Commercial real estate loans	3,057		1,308	5,457	9,822	230,815	240,637	106
Commercial loans	282		297	602	1,181	48,823	50,004	—
Total Commercial Banking	3,339		1,605	6,059	11,003	279,638	290,641	106
Total acquired loans	5,001		2,554	9,047	16,602	663,053	679,655	441
Total loans	$	22,221	18,507	52,843	93,571	7,902,491	7,996,062	441

(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, 2017 (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	$	23,786	6,030	12,613	42,429	2,619,951	2,662,380	—
Home equity loans	6,094		2,333	6,043	14,470	1,037,088	1,051,558	—
Consumer finance loans	2,128		1,113	199	3,440	15,179	18,619	—
Consumer loans	9,762		2,834	3,274	15,870	537,496	553,366	—
Total Personal Banking	41,770		12,310	22,129	76,209	4,209,714	4,285,923	—
Commercial Banking:
Commercial real estate loans	5,520		2,133	10,629	18,282	2,142,930	2,161,212	—
Commercial loans	1,469		204	2,806	4,479	516,719	521,198	—
Total Commercial Banking	6,989		2,337	13,435	22,761	2,659,649	2,682,410	—
Total originated loan	48,759		14,647	35,564	98,970	6,869,363	6,968,333	—
Acquired loans:
Personal Banking:
Residential mortgage loans	1,998		205	1,277	3,480	110,343	113,823	381
Home equity loans	1,367		538	1,306	3,211	255,586	258,797	98
Consumer loans	1,150		517	353	2,020	97,384	99,404	10
Total Personal Banking	4,515		1,260	2,936	8,711	463,313	472,024	489
Commercial Banking:
Commercial real estate loans	2,795		406	5,655	8,856	284,658	293,514	923
Commercial loans	396		237	334	967	58,571	59,538	—
Total Commercial Banking	3,191		643	5,989	9,823	343,229	353,052	923
Total acquired loan	7,706		1,903	8,925	18,534	806,542	825,076	1,412
Total	$	56,465	16,550	44,489	117,504	7,675,905	7,793,409	1,412

(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 quarter ended September 30, 2018 (in thousands): 

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,739,243	—	9,769	—	—	2,749,012
Home equity loans	1,042,627		—	5,746	—	—	1,048,373
Consumer finance loans	5,849		—	39	—	—	5,888
Consumer loans	699,033		—	3,908	—	—	702,941
Total Personal Banking	4,486,752		—	19,462	—	—	4,506,214
Commercial Banking:
Commercial real estate loans	2,083,302		47,983	146,144	—	—	2,277,429
Commercial loans	487,143		21,120	24,501	—	—	532,764
Total Commercial Banking	2,570,445		69,103	170,645	—	—	2,810,193
Total originated loans	7,057,197		69,103	190,107	—	—	7,316,407
Acquired loans:
Personal Banking:
Residential mortgage loans	96,563		—	1,259	—	—	97,822
Home equity loans	222,610		—	1,362	—	—	223,972
Consumer loans	66,673		—	547	—	—	67,220
Total Personal Banking	385,846		—	3,168	—	—	389,014
Commercial Banking:
Commercial real estate loans	199,850		5,546	35,241	—	—	240,637
Commercial loans	39,441		3,640	6,923	—	—	50,004
Total Commercial Banking	239,291		9,186	42,164	—	—	290,641
Total acquired loans	625,137		9,186	45,332	—	—	679,655
Total loans	$	7,682,334	78,289	235,439	—	—	7,996,062

The following table sets forth information about credit quality indicators, which were updated during the year ended December 31, 2017 (in thousands):

	Pass		Special mention	Substandard	Doubtful	Loss	Total loans receivable
Originated loans:
Personal Banking:
Residential mortgage loans	$	2,645,475	—	16,905	—	—	2,662,380
Home equity loans	1,042,965		—	8,593	—	—	1,051,558
Consumer finance loans	18,420		—	199	—	—	18,619
Consumer loans	549,550		—	3,816	—	—	553,366
Total Personal Banking	4,256,410		—	29,513	—	—	4,285,923
Commercial Banking:
Commercial real estate loans	1,964,565		78,699	117,948	—	—	2,161,212
Commercial loans	461,962		15,510	43,726	—	—	521,198
Total Commercial Banking	2,426,527		94,209	161,674	—	—	2,682,410
Total originated loans	6,682,937		94,209	191,187	—	—	6,968,333
Acquired loans:
Personal Banking:
Residential mortgage loans	112,990		—	833	—	—	113,823
Home equity loans	257,312		—	1,485	—	—	258,797
Consumer loans	98,659		—	745	—	—	99,404
Total Personal Banking	468,961		—	3,063	—	—	472,024
Commercial Banking:
Commercial real estate loans	251,761		4,838	36,915	—	—	293,514
Commercial loans	49,073		3,787	6,678	—	—	59,538
Total Commercial Banking	300,834		8,625	43,593	—	—	353,052
Total acquired loans	769,795		8,625	46,656	—	—	825,076
Total	$	7,452,732	102,834	237,843	—	—	7,793,409

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets subject to amortization

The following table provides information for intangible assets subject to amortization at the dates indicated (in thousands):

	September 30, 2018			December 31, 2017
Amortizable intangible assets:
Core deposit intangibles — gross	$	63,685		63,685
Less: accumulated amortization	(43,886		)	(40,029	)
Core deposit intangibles — net	19,799			23,656
Customer and Contract intangible assets — gross	10,474			10,474
Less: accumulated amortization	(9,106		)	(8,461	)
Customer and Contract intangible assets — net	$	1,368		2,013

Schedule of the actual aggregate amortization expense as well as estimated aggregate amortization expense, based upon current levels of intangible assets

The following table shows the actual aggregate amortization expense for the quarters ended September 30, 2018 and 2017, as well as the estimated aggregate amortization expense, based upon current levels of intangible assets, for the current fiscal year and each of the five succeeding fiscal years (in thousands): 

For the quarter ended September 30, 2018	$	1,462
For the quarter ended September 30, 2017	1,691
For the nine months ended September 30, 2018	4,502
For the nine months ended September 30, 2017	5,189
For the year ending December 31, 2018	5,848
For the year ending December 31, 2019	4,933
For the year ending December 31, 2020	4,017
For the year ending December 31, 2021	3,188
For the year ending December 31, 2022	2,456
For the year ending December 31, 2023	1,847

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, 2016	$	307,420
Goodwill from acquisition	—
Balance at December 31, 2017	307,420
Goodwill from acquisition	—
Balance at September 30, 2018	$	307,420

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

The computation of basic and diluted earnings per share follows (in thousands, except share data and per share amounts): 

	Quarter ended September 30,			Nine months ended September 30,
	2018		2017	2018	2017
Reported net income	$	27,740	23,591	79,024	72,319
Weighted average common shares outstanding	102,334,954		101,163,534	101,937,338	100,921,322
Dilutive potential shares due to effect of stock options	1,607,741		1,400,942	1,566,731	1,617,020
Total weighted average common shares and dilutive potential shares	103,942,695		102,564,476	103,504,069	102,538,342
Basic earnings per share:	$	0.27	0.23	0.78	0.72
Diluted earnings per share:	$	0.27	0.23	0.76	0.71

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Pension and Other Post-retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Schedule of net periodic costs for the defined benefit pension plans and the post retirement healthcare plans

The following table sets forth the net periodic costs for the defined benefit pension plans and post retirement healthcare plans for the periods indicated (in thousands):

	Quarter ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	1,716		1,537		—	—
Interest cost	1,678			1,719		14	17
Expected return on plan assets	(2,992		)	(2,628	)	—	—
Amortization of prior service cost	(581		)	(580	)	—	—
Amortization of the net loss	872			928		24	27
Net periodic cost	$	693		976		38	44

	Nine months ended September 30,
	Pension benefits					Other post-retirement benefits
	2018			2017		2018	2017
Service cost	$	5,148		4,612		—	—
Interest cost	5,034			5,159		41	51
Expected return on plan assets	(8,976		)	(7,884	)	—	—
Amortization of prior service cost	(1,742		)	(1,742	)	—	—
Amortization of the net loss	2,617			2,783		73	81
Net periodic cost	$	2,081		2,928		114	132

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Disclosures About Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of the carrying amount and estimated fair value of the entity's financial instruments included in the consolidated statement of financial condition

The following table sets forth the carrying amount and estimated fair value of our financial instruments included in the consolidated statement of financial condition at September 30, 2018 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	73,946	73,946	73,946	—	—
Securities available-for-sale	811,556		811,556	—	811,556	—
Securities held-to-maturity	24,222		23,534	—	23,534	—
Loans receivable, net	7,940,087		7,721,559	—	—	7,721,559
Accrued interest receivable	25,798		25,798	25,798	—	—
Interest rate swaps	4,386		4,386	—	4,386	—
FHLB Stock	15,452		15,452	—	—	15,452
Total financial assets	$	8,895,447	8,676,231	99,744	839,476	7,737,011
Financial liabilities:
Savings and checking deposits	$	6,550,748	6,550,748	6,550,748	—	—
Time deposits	1,403,205		1,431,500	—	—	1,431,500
Borrowed funds	179,117		179,111	179,111	—	—
Junior subordinated debentures	111,213		104,609	—	—	104,609
Interest rate swaps	4,479		4,479	—	4,479	—
Accrued interest payable	627		627	627	—	—
Total financial liabilities	$	8,249,389	8,271,074	6,730,486	4,479	1,536,109

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, 2017 (in thousands): 

	Carrying amount		Estimated fair value	Level 1	Level 2	Level 3
Financial assets:
Cash and cash equivalents	$	77,710	77,710	77,710	—	—
Securities available-for-sale	792,535		792,535	574	791,961	—
Securities held-to-maturity	29,678		29,667	—	29,667	—
Loans receivable, net	7,736,614		7,762,562	3,128	—	7,759,434
Accrued Interest Receivable	23,352		23,352	23,352	—	—
Interest rate swaps	214		214	—	214	—
FHLB Stock	11,733		11,733	—	—	11,733
Total financial assets	$	8,671,836	8,697,773	104,764	821,842	7,771,167
Financial liabilities:
Savings and checking accounts	$	6,414,366	6,414,366	6,414,366	—	—
Time deposits	1,412,623		1,433,380	—	—	1,433,380
Borrowed funds	108,238		108,238	108,238	—	—
Junior subordinated debentures	111,213		110,954	—	—	110,954
Interest rate swaps	1,278		1,278	—	1,278	—
Foreign exchange swaps	61		61	—	61	—
Accrued interest payable	460		460	460	—	—
Total financial liabilities	$	8,048,239	8,068,737	6,523,064	1,339	1,544,334

Schedule of assets and liabilities measured at fair value on a recurring basis

The following table represents assets and liabilities measured at fair value on a recurring basis at September 30, 2018 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Debt securities:
U.S. government and agencies	$	—	14,695	—	14,695
Government sponsored enterprises	—		186,445	—	186,445
States and political subdivisions	—		24,744	—	24,744
Corporate	—		912	—	912
Total debt securities	—		226,796	—	226,796
Residential mortgage-backed securities:
GNMA	—		27,820	—	27,820
FNMA	—		71,251	—	71,251
FHLMC	—		53,907	—	53,907
Non-agency	—		535	—	535
Collateralized mortgage obligations:
GNMA	—		53,969	—	53,969
FNMA	—		205,066	—	205,066
FHLMC	—		172,212	—	172,212
Non-agency	—		—	—	—
Total mortgage-backed securities	—		584,760	—	584,760
Interest rate swaps	—		4,386	—	4,386
Total Assets	$	—	815,942	—	815,942
Interest rate swaps	$	—	4,479	—	4,479
Total Liabilities	$	—	4,479	—	4,479

The following table represents assets and liabilities measured at fair value on a recurring basis at December 31, 2017 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Equity securities	$	574	—	—	574
Debt securities:
U.S. government and agencies	—		1	—	1
Government sponsored enterprises	—		209,269	—	209,269
States and political subdivisions	—		51,056	—	51,056
Corporate	—		909	—	909
Total debt securities	—		261,235	—	261,235
Residential mortgage-backed securities:
GNMA	—		29,695	—	29,695
FNMA	—		82,969	—	82,969
FHLMC	—		64,021	—	64,021
Non-agency	—		555	—	555
Collateralized mortgage obligations:
GNMA	—		4,769	—	4,769
FNMA	—		191,512	—	191,512
FHLMC	—		157,190	—	157,190
Non-agency	—		15	—	15
Total mortgage-backed securities	—		530,726	—	530,726
Interest rate swaps	—		214	—	214
Total Assets	$	574	792,175	—	792,749
Interest rate swaps	$	—	1,278	—	1,278
Foreign exchange swaps	—		61	—	61
Total Liabilities	$	—	1,339	—	1,339

Schedule of reconciliation of debt securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the periods indicated (in thousands): 

	Quarter ended			Nine months ended
	September 30, 2018		September 30, 2017	September 30, 2018	September 30, 2017
Beginning balance January 1,	$	—	10,638	—	9,366
Total net realized investment gains/ (losses) and net change in unrealized appreciation/ (depreciation):
Included in net income as OTTI	—		—	—	—
Included in other comprehensive income	—		21	—	1,293
Purchases	—		—	—	—
Sales	—		—	—	—
Transfers in to Level 3	—		—	—	—
Transfers out of Level 3	—		—	—	—
Ending balance September 30,	$	—	10,659	—	10,659

Schedule of fair value measurement for nonrecurring assets

The following table represents the fair market measurement for only those nonrecurring assets that had a fair market value below the carrying amount as of September 30, 2018 (in thousands):

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	37,932	37,932
Real estate owned	—		—	2,486	2,486
Total assets	$	—	—	40,418	40,418

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, 2017 (in thousands): 

	Level 1		Level 2	Level 3	Total assets at fair value
Loans measured for impairment	$	—	—	33,421	33,421
Real estate owned	—		—	5,666	5,666
Total assets	$	—	—	39,087	39,087

Schedule of quantitative information about assets measured at fair value on a recurring and nonrecurring basis for Level 3 fair value measurements

The table presents additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at September 30, 2018 (dollar amounts in thousands): 

	Fair value	Valuation techniques	Significant unobservable inputs	Range (weighted average)
Loans measured for impairment	37,932	Appraisal value (1)	Estimated cost to sell	10.0%
		Discounted cash flow	Discount rate	4.25% to 10.0% (7.50%)
Real estate owned	2,486	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.

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Derivative Financial Instruments - (Tables)

9 Months Ended

Sep. 30, 2018

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:

	Asset Derivatives			Liability Derivatives
	Notional Amount		Fair Value	Notional Amount	Fair Value
At September 30, 2018
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	25,000	93
Derivatives not designed as hedging instruments:
Interest rate swap agreements	209,353		4,386	209,353	4,386
Total derivatives	$	209,353	4,386	234,353	4,479
At December 31, 2017
Derivatives designed as hedging instruments:
Interest rate swap agreements	$	—	—	50,000	1,064
Derivatives not designed as hedging instruments:
Interest rate swap agreements	92,631		214	92,631	214
Foreign exchange swap agreements	—		—	12,344	61
Total derivatives	$	92,631	214	154,975	1,339

Derivative instruments gain (loss)

The following table presents income or expense recognized on derivatives for the periods indicated:

	For the quarter ended September 30,		For the nine months ended September 30,
	2018	2017	2018		2017
Hedging interest rate derivatives:
Increase in interest expense	257	393	857		1,216
Non-hedging swap derivatives:
Increase/ (decrease) in other income	—	99	(288	)	333

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Changes in Accumulated Other Comprehensive Income/ (Loss) (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Schedule of changes in accumulated other comprehensive income by component

The following table shows the changes in accumulated other comprehensive income by component for the periods indicated (in thousands): 

	For the quarter ended September 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 June 30, 2018	$	(10,693	)	(266	)	(32,134	)	(43,093	)
Other comprehensive income/ (loss) before reclassification adjustments	(1,970		)	192		—		(1,778	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(44		)	—		226		182
Net other comprehensive income/ (loss)	(2,014		)	192		226		(1,596	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the quarter ended September 30, 2017
	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 June 30, 2017	$	2,276		(1,257	)	(26,167	)	(25,148	)
Other comprehensive income before reclassification adjustments	(264		)	258		—		(6	)
Amounts reclassified from accumulated other comprehensive income (3), (4)	(674		)	—		221		(453	)
Net other comprehensive income	(938		)	258		221		(459	)
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gain on securities (gain on sales of investments, net) of $61, net of tax (income tax expense) of $(17).

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $581 and amortization of net loss (compensation and employee benefits) of $(897), net of tax (income tax expense) of $90.

(3) Consists of realized gain on securities (gain on sales of investments, net) of $1,043, net of tax (income tax expense) of $(369).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $580 and amortization of net loss (compensation and employee benefits) of $(954), net of tax (income tax expense) of $153. 

	For the nine months ended September 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	(7,169		)	766		—		(6,403	)
Amounts reclassified from accumulated other comprehensive income (1), (2)	(138		)	—		678		540
Net other comprehensive income/ (loss)	(7,307		)	766		678		(5,863	)
Balance as of September 30, 2018	$	(12,707	)	(74	)	(31,908	)	(44,689	)

	For the nine months ended September 30, 2017
	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, 2016	$	395		(1,778	)	(26,608	)	(27,991	)
Other comprehensive income before reclassification adjustments	1,684			779		—		2,463
Amounts reclassified from accumulated other comprehensive income (3), (4)	(741		)	—		662		(79	)
Net other comprehensive income	943			779		662		2,384
Balance as of September 30, 2017	$	1,338		(999	)	(25,946	)	(25,607	)

(1) Consists of realized gains on securities (loss on sales of investments, net) of $192, net of tax (income tax expense) of $54.

(2) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742and amortization of net loss (compensation and employee benefits) of $(2,691), net of tax (income tax expense) of $271.

(3) Consists of realized gains on securities (gain on sales of investments, net) of $1,157, net of tax (income tax expense) of $(416).

(4) Consists of amortization of prior service cost (compensation and employee benefits) of $1,742 and amortization of net loss (compensation and employee benefits) of $(2,864), net of tax (income tax expense) of $460.

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Basis of Presentation and Informational Disclosures (Details)		3 Months Ended		9 Months Ended
	May 14, 2018 $ / shares shares	Sep. 30, 2018 USD ($) bank	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) bank	Sep. 30, 2017 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of banking locations | bank		172		172
Stock Related Compensation
Stock-based compensation expense		$ 1,300,000	$ 1,100,000	$ 4,500,000	$ 3,700,000
Unrecognized tax benefits liability		0		0
Reclassification due to adoption of ASU No. 2018-02		6,700,000
Employee Stock Ownership Plan
Stock Related Compensation
Compensation expense yet to be recognized		4,300,000		4,300,000
Restricted common shares
Stock Related Compensation
Compensation expense yet to be recognized		18,600,000		18,600,000
Accounting Standards Update 2017-07
Stock Related Compensation
Reversal of net periodic benefit expense		$ 517,000		$ 1,600,000
Employee | Employee Stock Ownership Plan
Stock Related Compensation
Options, grants in period (in shares) | shares	831,160
Options, grants in period (in dollars per share) | $ / shares	$ 16.59
Options, grants in period weighted average grant date value (in dollars per share) | $ / shares	$ 1.49
Employee | Restricted common shares
Stock Related Compensation
Equity instruments other than options grants in period (in shares) | shares	390,030
Director | Employee Stock Ownership Plan
Stock Related Compensation
Options, grants in period (in shares) | shares	64,800
Award vesting period	7 years
Director | Restricted common shares
Stock Related Compensation
Equity instruments other than options grants in period (in shares) | shares	24,300
Equity instruments other than options, grants in period grant date fair value (in dollars per share) | $ / shares	$ 16.59

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Investment securities and impairment of investment securities - Available For Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized cost
Residential mortgage-backed securities	$ 829,345	$ 800,094
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	2,173	3,453
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(19,962)	(11,012)
Fair value
Securities available-for-sale	811,556	792,535
U.S. government and agencies
Amortized cost
Due after one year through five years	14,707
Due in one year or less		1
Gross unrealized holding gains
Due after one year through five years	0
Due in one year or less		0
Gross unrealized holding losses
Due after one year through five years	(12)
Due in one year or less		0
Fair value
Due after one year through five years	14,695
Due in one year or less		1
Debt issued by government sponsored enterprises:
Amortized cost
Due after one year through five years	116,097	140,624
Due in one year or less	70,096	66,566
Due after ten years	3,822	4,833
Gross unrealized holding gains
Due after one year through five years	0	0
Due in one year or less	0	14
Due after ten years	0	0
Gross unrealized holding losses
Due after one year through five years	(2,560)	(2,402)
Due in one year or less	(895)	(289)
Due after ten years	(115)	(77)
Fair value
Due after one year through five years	113,537	138,222
Due in one year or less	69,201	66,291
Due after ten years	3,707	4,756
Equity securities
Amortized cost
Equity securities amortized cost		551
Gross unrealized holding gains
Equity securities, gross unrealized holding gains		29
Gross unrealized holding losses
Equity securities, gross unrealized holding losses		(6)
Fair value
Equity securities		574
Municipal securities
Amortized cost
Due after one year through five years	3,553	7,072
Due in one year or less	2,351	2,492
Due after five years through ten years	11,714	14,576
Due after ten years	7,073	26,371
Gross unrealized holding gains
Due after one year through five years	43	82
Due in one year or less	3	7
Due after five years through ten years	46	171
Due after ten years	31	292
Gross unrealized holding losses
Due after one year through five years	(11)	(6)
Due in one year or less	(7)	(1)
Due after five years through ten years	(23)	0
Due after ten years	(29)	0
Fair value
Due after one year through five years	3,585	7,148
Due in one year or less	2,347	2,498
Due after five years through ten years	11,737	14,747
Due after ten years	7,075	26,663
Corporate debt securities
Amortized cost
Due after five years through ten years	912
Due after ten years		909
Gross unrealized holding gains
Due after five years through ten years	0
Due after ten years		0
Gross unrealized holding losses
Due after five years through ten years	0
Due after ten years		0
Fair value
Due after five years through ten years	912
Due after ten years		909
Residential mortgage-backed securities
Amortized cost
Residential mortgage-backed securities	599,020	536,099
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	2,050	2,858
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(16,310)	(8,231)
Fair value
Securities available-for-sale	584,760	530,726
Fixed rate | Pass-through
Amortized cost
Residential mortgage-backed securities	131,255	144,411
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	514	1,108
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(5,689)	(2,817)
Fair value
Securities available-for-sale	126,080	142,702
Fixed rate | Non-agency CMOs
Amortized cost
Residential mortgage-backed securities	0	15
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	0	0
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	0	0
Fair value
Securities available-for-sale	0	15
Fixed rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	374,900	284,320
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	5	37
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(10,595)	(5,271)
Fair value
Securities available-for-sale	364,310	279,086
Variable rate | Pass-through
Amortized cost
Residential mortgage-backed securities	26,374	33,079
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	1,064	1,464
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(5)	(6)
Fair value
Securities available-for-sale	27,433	34,537
Variable rate | Agency CMOs
Amortized cost
Residential mortgage-backed securities	66,491	74,274
Gross unrealized holding gains
Residential mortgage-backed securities, gross unrealized holding gains	467	249
Gross unrealized holding losses
Residential mortgage-backed securities, gross unrealized holding losses	(21)	(137)
Fair value
Securities available-for-sale	$ 66,937	$ 74,386

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Investment securities and impairment of investment securities - Held To Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized cost
Marketable securities held-to-maturity, amortized cost	$ 24,222	$ 29,678
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	94	237
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	(782)	(248)
Fair value
Marketable securities held-to-maturity, fair value	23,534	29,667
Residential mortgage-backed securities
Amortized cost
Marketable securities held-to-maturity, amortized cost	24,222	29,678
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	94	237
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	(782)	(248)
Fair value
Marketable securities held-to-maturity, fair value	23,534	29,667
Fixed rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	3,027	3,760
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	44	140
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	3,071	3,900
Fixed rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	18,753	22,906
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	0	20
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	(782)	(248)
Fair value
Marketable securities held-to-maturity, fair value	17,971	22,678
Variable rate | Pass-through
Amortized cost
Marketable securities held-to-maturity, amortized cost	1,778	2,283
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	39	64
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	1,817	2,347
Variable rate | Agency CMOs
Amortized cost
Marketable securities held-to-maturity, amortized cost	664	729
Gross unrealized holding gains
Marketable securities held-to-maturity, gross unrealized holding gains	11	13
Gross unrealized holding losses
Marketable securities held-to-maturity, gross unrealized holding losses	0	0
Fair value
Marketable securities held-to-maturity, fair value	$ 675	$ 742

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Investment securities and impairment of investment securities - Fair Value of and Gross Unrealized Losses on Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Marketable securities
Less than 12 months - Fair value	$ 255,686	$ 249,272
Less than 12 months - Unrealized loss	(2,387)	(2,536)
12 months or more - Fair value	460,082	400,583
12 months or more - Unrealized loss	(18,357)	(8,724)
Total - Fair value	715,768	649,855
Total - Unrealized loss	(20,744)	(11,260)
U.S. government and agencies
Marketable securities
Less than 12 months - Fair value	55,650	5,006
Less than 12 months - Unrealized loss	(210)	(7)
12 months or more - Fair value	130,795	197,695
12 months or more - Unrealized loss	(3,360)	(2,761)
Total - Fair value	186,445	202,701
Total - Unrealized loss	(3,570)	(2,768)
Municipal securities
Marketable securities
Less than 12 months - Fair value	9,025	4,563
Less than 12 months - Unrealized loss	(70)	(7)
12 months or more - Fair value	0	0
12 months or more - Unrealized loss	0	0
Total - Fair value	9,025	4,563
Total - Unrealized loss	(70)	(7)
Equity securities
Marketable securities
Less than 12 months - Fair value		0
Less than 12 months - Unrealized loss		0
12 months or more - Fair value		544
12 months or more - Unrealized loss		(6)
Total - Fair value		544
Total - Unrealized loss		(6)
Residential mortgage-backed securities | Agency CMOs
Marketable securities
Less than 12 months - Fair value	176,316	239,703
Less than 12 months - Unrealized loss	(2,095)	(2,522)
12 months or more - Fair value	329,287	202,344
12 months or more - Unrealized loss	(14,997)	(5,957)
Total - Fair value	505,603	442,047
Total - Unrealized loss	(17,092)	$ (8,479)
U.S. government and agencies
Marketable securities
Less than 12 months - Fair value	14,695
Less than 12 months - Unrealized loss	(12)
12 months or more - Fair value	0
12 months or more - Unrealized loss	0
Total - Fair value	14,695
Total - Unrealized loss	$ (12)

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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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Cumulative roll forward of credit related impairment losses recognized in earnings for debt securities held and not intended to be sold:
Beginning balance	$ 0	$ 7,942	$ 352	$ 7,942
Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	0	0	0	0
Reduction for losses realized during the quarter			(352)	0
Reduction for securities sold/ called realized during the nine months	0	0	0	0
Additional credit losses on debt securities for which other-than-temporary impairment was previously recognized	0	0	0	0
Ending balance	$ 0	$ 7,942	$ 0	$ 7,942

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Loans receivable - Summary of Originated and Acquired Loans (Details) - USD ($)	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	$ 8,237,772,000		$ 7,972,735,000
Deferred loan costs	33,782,000		27,782,000
Allowance for loan losses	(55,975,000)	$ (57,332,000)	(56,795,000)	$ (56,927,000)	$ (62,885,000)	$ (60,939,000)
Total loans receivable, net	7,940,087,000		7,736,614,000
Residential mortgage loans held-for-sale	0		3,128,000
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(11,335,000)		(10,067,000)
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(200,822,000)		(144,614,000)
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(63,335,000)		(52,427,000)
Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	4,872,781,000		4,740,232,000
Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,843,012,000		2,772,549,000
Residential mortgage loans held-for-sale	0		3,100,000
Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,272,345,000		1,310,355,000
Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	5,888,000		18,619,000
Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	751,536,000		638,709,000
Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,364,991,000		3,232,503,000
Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,718,888,000		2,599,340,000
Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	646,103,000		633,163,000
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	7,557,223,000		7,145,255,000
Deferred loan costs	32,846,000		26,255,000
Allowance for loan losses	(51,473,000)	(51,138,000)	(50,572,000)	(50,845,000)	(56,627,000)	(55,293,000)
Total loans receivable, net	7,264,934,000		6,917,761,000
Originated | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(11,335,000)		(10,067,000)
Originated | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(200,152,000)		(141,967,000)
Originated | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(62,175,000)		(51,143,000)
Originated | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	4,484,703,000		4,269,735,000
Allowance for loan losses	(20,049,000)	(19,610,000)	(20,339,000)	(19,540,000)	(17,339,000)	(16,116,000)
Originated | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,745,190,000		2,658,726,000
Allowance for loan losses	(4,144,000)	(3,657,000)	(3,824,000)	(3,986,000)	(4,635,000)	(4,656,000)
Originated | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	1,048,373,000		1,051,558,000
Allowance for loan losses	(3,234,000)	(3,839,000)	(4,072,000)	(3,295,000)	(2,957,000)	(3,486,000)
Originated | Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	5,888,000		18,619,000
Allowance for loan losses	(1,650,000)	(2,354,000)	(3,968,000)	(4,876,000)	(4,467,000)	(3,445,000)
Originated | Personal Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	685,252,000		540,832,000
Allowance for loan losses	(11,021,000)	(9,760,000)	(8,475,000)	(7,383,000)	(5,280,000)	(4,529,000)
Originated | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	3,072,520,000		2,875,520,000
Allowance for loan losses	(31,424,000)	(31,528,000)	(30,233,000)	(31,305,000)	(39,288,000)	(39,177,000)
Originated | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	2,477,581,000		2,303,179,000
Allowance for loan losses	(25,694,000)	(21,019,000)	(19,911,000)	(20,174,000)	(22,584,000)	(23,667,000)
Originated | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	594,939,000		572,341,000
Allowance for loan losses	(5,730,000)	(10,509,000)	(10,322,000)	(11,131,000)	(16,704,000)	(15,510,000)
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	680,549,000		827,480,000
Deferred loan costs	936,000		1,527,000
Allowance for loan losses	(4,502,000)	(6,194,000)	(6,223,000)	(6,082,000)	(6,258,000)	(5,646,000)
Total loans receivable, net	675,153,000		818,853,000
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	(670,000)		(2,647,000)
Acquired | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Undisbursed loan proceeds	(1,160,000)		(1,284,000)
Acquired | Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	388,078,000		470,497,000
Allowance for loan losses	(954,000)	(1,747,000)	(1,783,000)	(1,419,000)	(1,336,000)	(1,771,000)
Acquired | Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	97,822,000		113,823,000
Allowance for loan losses	(102,000)	(170,000)	(131,000)	(77,000)	(85,000)	(71,000)
Acquired | Personal Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	223,972,000		258,797,000
Allowance for loan losses	(408,000)	(662,000)	(762,000)	(748,000)	(623,000)	(1,047,000)
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	66,284,000		97,877,000
Allowance for loan losses	(444,000)	(915,000)	(890,000)	(594,000)	(628,000)	(653,000)
Acquired | Commercial Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	292,471,000		356,983,000
Allowance for loan losses	(3,548,000)	(4,447,000)	(4,440,000)	(4,663,000)		(3,875,000)
Acquired | Commercial Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(3,301,000)	(2,446,000)
Acquired | Commercial Banking | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(1,362,000)	(2,476,000)
Acquired | Commercial Banking | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses				(4,663,000)	$ (4,922,000)
Acquired | Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	241,307,000		296,161,000
Allowance for loan losses	(2,876,000)	(3,422,000)	(3,549,000)	(3,301,000)		(3,008,000)
Acquired | Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, gross	51,164,000		60,822,000
Allowance for loan losses	$ (672,000)	$ (1,025,000)	$ (891,000)	$ (1,362,000)		$ (867,000)

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Loans receivable - Outstanding Principal Balance and Related Carrying Value of Acquired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 686,986	$ 833,940
Carrying value	679,655	825,076
Acquired loans evaluated individually for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	8,446	9,735
Carrying value	5,871	6,875
Acquired loans evaluated collectively for future credit losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	678,540	824,205
Carrying value	$ 673,784	$ 818,201

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Loans receivable - Changes in the Accretable Discount (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Changes in accretable yield
Beginning balance	$ 1,540	$ 2,187
Accretion	(588)	(1,318)
Net reclassification from nonaccretable yield	0	671
Ending balance	$ 952	$ 1,540

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Loans receivable - Composition of Acquired Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	$ 113,118	$ 84,625
Average recorded investment in impaired loans	82,504	97,193
Interest income recognized	2,791	3,982
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	34,682	36,833
Average recorded investment in impaired loans	33,609	35,102
Interest income recognized	1,204	1,552
Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	21,439	21,605
Average recorded investment in impaired loans	20,499	21,531
Interest income recognized	659	892
Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	8,897	10,356
Average recorded investment in impaired loans	9,250	9,150
Interest income recognized	375	452
Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	4,307	4,673
Average recorded investment in impaired loans	3,835	4,042
Interest income recognized	166	188
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	78,436	47,792
Average recorded investment in impaired loans	48,895	62,091
Interest income recognized	1,587	2,430
Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	70,720	37,027
Average recorded investment in impaired loans	39,985	49,981
Interest income recognized	1,195	1,758
Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	7,716	10,765
Average recorded investment in impaired loans	8,910	12,110
Interest income recognized	392	672
Acquired loans evaluated individually for future credit losses
Composition of impaired loans by portfolio segment and by class of financing receivable
Carrying value	5,871	6,875
Outstanding principal balance	8,446	9,735
Related impairment reserve	25	88
Average recorded investment in impaired loans	6,373	9,770
Interest income recognized	588	1,318
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	2,150	2,384
Outstanding principal balance	3,813	4,259
Related impairment reserve	24	49
Average recorded investment in impaired loans	2,267	2,601
Interest income recognized	293	389
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	1,099	1,182
Outstanding principal balance	1,741	1,880
Related impairment reserve	13	24
Average recorded investment in impaired loans	1,140	1,251
Interest income recognized	135	181
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	1,019	1,143
Outstanding principal balance	1,977	2,219
Related impairment reserve	7	21
Average recorded investment in impaired loans	1,081	1,253
Interest income recognized	127	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	32	59
Outstanding principal balance	95	160
Related impairment reserve	4	4
Average recorded investment in impaired loans	46	97
Interest income recognized	31	51
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	3,721	4,491
Outstanding principal balance	4,633	5,476
Related impairment reserve	1	39
Average recorded investment in impaired loans	4,106	7,169
Interest income recognized	295	929
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	3,643	4,388
Outstanding principal balance	4,548	5,363
Related impairment reserve	1	39
Average recorded investment in impaired loans	4,015	6,992
Interest income recognized	287	914
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	103
Outstanding principal balance	85	113
Related impairment reserve	0	0
Average recorded investment in impaired loans	91	177
Interest income recognized	$ 8	$ 15

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Loans receivable - Changes in the Allowance for Losses on Loans Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	$ 57,332	$ 62,885	$ 56,795	$ 60,939
Current period provision	6,982	3,027	16,540	13,226
Charge-offs	(10,399)	(10,046)	(22,483)	(22,222)
Recoveries	2,060	1,061	5,123	4,984
Balance at the end of the period	55,975	56,927	55,975	56,927
Originated
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	51,138	56,627	50,572	55,293
Current period provision	8,504	993	17,395	9,071
Charge-offs	(10,098)	(7,598)	(21,007)	(17,218)
Recoveries	1,929	823	4,513	3,699
Balance at the end of the period	51,473	50,845	51,473	50,845
Originated | Personal Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	19,610	17,339	20,339	16,116
Current period provision	3,726	8,967	9,890	16,576
Charge-offs	(4,364)	(7,231)	(13,252)	(14,862)
Recoveries	1,077	465	3,072	1,710
Balance at the end of the period	20,049	19,540	20,049	19,540
Originated | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	3,657	4,635	3,824	4,656
Current period provision	491	(462)	678	(278)
Charge-offs	(204)	(211)	(710)	(678)
Recoveries	200	24	352	286
Balance at the end of the period	4,144	3,986	4,144	3,986
Originated | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	3,839	2,957	4,072	3,486
Current period provision	(351)	615	(164)	503
Charge-offs	(323)	(285)	(866)	(803)
Recoveries	69	8	192	109
Balance at the end of the period	3,234	3,295	3,234	3,295
Originated | Personal Banking | Consumer finance loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	2,354	4,467	3,968	3,445
Current period provision	(437)	4,220	(469)	6,610
Charge-offs	(445)	(3,891)	(2,484)	(5,469)
Recoveries	178	80	635	290
Balance at the end of the period	1,650	4,876	1,650	4,876
Originated | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	9,760	5,280	8,475	4,529
Current period provision	4,023	4,594	9,845	9,741
Charge-offs	(3,392)	(2,844)	(9,192)	(7,912)
Recoveries	630	353	1,893	1,025
Balance at the end of the period	11,021	7,383	11,021	7,383
Originated | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	31,528	39,288	30,233	39,177
Current period provision	4,778	(7,974)	7,505	(7,505)
Charge-offs	(5,734)	(367)	(7,755)	(2,356)
Recoveries	852	358	1,441	1,989
Balance at the end of the period	31,424	31,305	31,424	31,305
Originated | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	21,019	22,584	19,911	23,667
Current period provision	8,723	(2,529)	10,417	(3,988)
Charge-offs	(4,820)	(163)	(5,702)	(498)
Recoveries	772	282	1,068	993
Balance at the end of the period	25,694	20,174	25,694	20,174
Originated | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	10,509	16,704	10,322	15,510
Current period provision	(3,945)	(5,445)	(2,912)	(3,517)
Charge-offs	(914)	(204)	(2,053)	(1,858)
Recoveries	80	76	373	996
Balance at the end of the period	5,730	11,131	5,730	11,131
Acquired
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	6,194	6,258	6,223	5,646
Current period provision	(1,522)	2,034	(855)	4,155
Charge-offs	(301)	(2,448)	(1,476)	(5,004)
Recoveries	131	238	610	1,285
Balance at the end of the period	4,502	6,082	4,502	6,082
Acquired | Personal Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	1,747	1,336	1,783	1,771
Current period provision	(691)	419	(316)	1,047
Charge-offs	(191)	(405)	(881)	(1,951)
Recoveries	89	69	368	552
Balance at the end of the period	954	1,419	954	1,419
Acquired | Personal Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	170	85	131	71
Current period provision	(70)	(11)	(38)	130
Charge-offs	(10)	(4)	(94)	(199)
Recoveries	12	7	103	75
Balance at the end of the period	102	77	102	77
Acquired | Personal Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	662	623	762	1,047
Current period provision	(173)	324	85	512
Charge-offs	(103)	(243)	(578)	(1,063)
Recoveries	22	44	139	252
Balance at the end of the period	408	748	408	748
Acquired | Personal Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	915	628	890	653
Current period provision	(448)	106	(363)	405
Charge-offs	(78)	(158)	(209)	(689)
Recoveries	55	18	126	225
Balance at the end of the period	444	594	444	594
Acquired | Commercial Banking
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	4,447		4,440	3,875
Current period provision	(831)		(539)	3,108
Charge-offs	(110)		(595)	(3,053)
Recoveries	42		242	733
Balance at the end of the period	3,548	4,663	3,548	4,663
Acquired | Commercial Banking | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		2,446
Current period provision		2,433
Charge-offs		(1,738)
Recoveries		160
Balance at the end of the period		3,301		3,301
Acquired | Commercial Banking | Home equity loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		2,476
Current period provision		(818)
Charge-offs		(305)
Recoveries		9
Balance at the end of the period		1,362		1,362
Acquired | Commercial Banking | Consumer loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period		4,922
Current period provision		1,615
Charge-offs		(2,043)
Recoveries		169
Balance at the end of the period		4,663		4,663
Acquired | Commercial Banking | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	3,422		3,549	3,008
Current period provision	(532)		(688)	1,832
Charge-offs	(39)		(147)	(2,206)
Recoveries	25		162	667
Balance at the end of the period	2,876	3,301	2,876	3,301
Acquired | Commercial Banking | Commercial loans
Changes in allowance for losses on allocated loans receivable
Balance at the beginning of the period	1,025		891	867
Current period provision	(299)		149	1,276
Charge-offs	(71)		(448)	(847)
Recoveries	17		80	66
Balance at the end of the period	$ 672	$ 1,362	$ 672	$ 1,362

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Loans receivable - Loan Portfolio by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 7,996,062		$ 7,793,409
Allowance for loan losses	55,975		56,795
Nonaccrual loans	74,227		64,455
Loans past due 90 days or more and still accruing	195		502
TDRs	29,147	$ 30,662	32,104	$ 38,469	$ 41,860	$ 42,926
Allowance related to TDRs	3,067		3,144
Additional commitments to customers with loans classified as TDRs	421		247
Nonaccrual TDRs	9,777		12,300	$ 17,809
Personal Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	4,895,228		4,757,947
Allowance for loan losses	21,003		22,122
Nonaccrual loans	26,016		28,570
Loans past due 90 days or more and still accruing	195		502
TDRs	9,729		9,716
Allowance related to TDRs	1,275		1,277
Additional commitments to customers with loans classified as TDRs	4		4
Personal Banking | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	2,846,834		2,776,203
Allowance for loan losses	4,246		3,955
Nonaccrual loans	14,585		14,791
Loans past due 90 days or more and still accruing	0		0
TDRs	7,668		8,000
Allowance related to TDRs	778		815
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	1,272,345		1,310,355
Allowance for loan losses	3,642		4,834
Nonaccrual loans	7,085		8,907
Loans past due 90 days or more and still accruing	72		120
TDRs	2,061		1,716
Allowance related to TDRs	497		462
Additional commitments to customers with loans classified as TDRs	4		4
Personal Banking | Consumer finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	5,888		18,619
Allowance for loan losses	1,650		3,968
Nonaccrual loans	39		199
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	770,161		652,770
Allowance for loan losses	11,465		9,365
Nonaccrual loans	4,307		4,673
Loans past due 90 days or more and still accruing	123		379
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	3,100,834		3,035,462
Allowance for loan losses	34,972		34,673
Nonaccrual loans	48,211		35,885
Loans past due 90 days or more and still accruing	0		0
TDRs	19,418		22,388
Allowance related to TDRs	1,792		1,867
Additional commitments to customers with loans classified as TDRs	417		243
Commercial Banking | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	2,518,066		2,454,726
Allowance for loan losses	28,570		23,460
Nonaccrual loans	43,023		28,473
Loans past due 90 days or more and still accruing	0		0
TDRs	15,667		15,691
Allowance related to TDRs	1,516		1,125
Additional commitments to customers with loans classified as TDRs	208		235
Commercial Banking | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	582,768		580,736
Allowance for loan losses	6,402		11,213
Nonaccrual loans	5,188		7,412
Loans past due 90 days or more and still accruing	0		0
TDRs	3,751		6,697
Allowance related to TDRs	276		742
Additional commitments to customers with loans classified as TDRs	$ 209		$ 8

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Loans receivable - Composition of Impaired Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	$ 74,227	$ 64,455
Total impaired loans	113,118	84,625
Average recorded investment in impaired loans	82,504	97,193
Interest income recognized on impaired loans	2,791	3,982
Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	26,016	28,570
Total impaired loans	34,682	36,833
Average recorded investment in impaired loans	33,609	35,102
Interest income recognized on impaired loans	1,204	1,552
Personal Banking | Residential mortgage loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	14,585	14,791
Total impaired loans	21,439	21,605
Average recorded investment in impaired loans	20,499	21,531
Interest income recognized on impaired loans	659	892
Personal Banking | Home equity loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	7,085	8,907
Total impaired loans	8,897	10,356
Average recorded investment in impaired loans	9,250	9,150
Interest income recognized on impaired loans	375	452
Personal Banking | Consumer finance loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	39	199
Total impaired loans	39	199
Average recorded investment in impaired loans	25	379
Interest income recognized on impaired loans	4	20
Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	4,307	4,673
Total impaired loans	4,307	4,673
Average recorded investment in impaired loans	3,835	4,042
Interest income recognized on impaired loans	166	188
Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	48,211	35,885
Total impaired loans	78,436	47,792
Average recorded investment in impaired loans	48,895	62,091
Interest income recognized on impaired loans	1,587	2,430
Commercial Banking | Commercial real estate loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	43,023	28,473
Total impaired loans	70,720	37,027
Average recorded investment in impaired loans	39,985	49,981
Interest income recognized on impaired loans	1,195	1,758
Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	5,188	7,412
Total impaired loans	7,716	10,765
Average recorded investment in impaired loans	8,910	12,110
Interest income recognized on impaired loans	392	672
90 Days or greater delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	52,402	43,077
90 Days or greater delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	22,566	24,576
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	13,154	13,509
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	5,838	7,251
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	39	199
90 Days or greater delinquent | Personal Banking | Consumer loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,535	3,617
90 Days or greater delinquent | Commercial Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	29,836	18,501
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	27,122	15,361
90 Days or greater delinquent | Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	2,714	3,140
Less than 90 days delinquent
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	21,825	21,378
Loans less than 90 days delinquent reviewed for impairment	23,311	5,337
TDRs less than 90 days delinquent not included elsewhere	15,580	14,833
Less than 90 days delinquent | Personal Banking
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	3,450	3,994
Loans less than 90 days delinquent reviewed for impairment	505	0
TDRs less than 90 days delinquent not included elsewhere	8,161	8,263
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	1,431	1,282
Loans less than 90 days delinquent reviewed for impairment	505	0
TDRs less than 90 days delinquent not included elsewhere	6,349	6,814
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	1,247	1,656
Loans less than 90 days delinquent reviewed for impairment	0	0
TDRs less than 90 days delinquent not included elsewhere	1,812	1,449
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	772	1,056
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	18,375	17,384
Loans less than 90 days delinquent reviewed for impairment	22,806	5,337
TDRs less than 90 days delinquent not included elsewhere	7,419	6,570
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	15,901	13,112
Loans less than 90 days delinquent reviewed for impairment	22,583	4,431
TDRs less than 90 days delinquent not included elsewhere	5,114	4,123
Less than 90 days delinquent | Commercial Banking | Commercial loans
Composition of impaired loans by portfolio segment and by class of financing receivable
Nonaccrual loans	2,474	4,272
Loans less than 90 days delinquent reviewed for impairment	223	906
TDRs less than 90 days delinquent not included elsewhere	$ 2,305	$ 2,447

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Loans receivable - Evaluation of Impaired Loans by Portfolio Segment and by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	$ 7,924,583	$ 7,752,745
Loans individually evaluated for impairment	71,479	40,664
Loans individually evaluated for impairment for which there is a related impairment reserve	42,583	37,411
Related impairment reserve	4,651	3,990
Loans individually evaluated for impairment for which there is no related reserve	28,896	3,253
Personal Banking
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	4,884,897	4,747,578
Loans individually evaluated for impairment	10,331	10,369
Loans individually evaluated for impairment for which there is a related impairment reserve	10,331	10,369
Related impairment reserve	1,299	1,302
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	2,838,600	2,767,635
Loans individually evaluated for impairment	8,234	8,568
Loans individually evaluated for impairment for which there is a related impairment reserve	8,234	8,568
Related impairment reserve	795	816
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	1,270,284	1,308,639
Loans individually evaluated for impairment	2,061	1,716
Loans individually evaluated for impairment for which there is a related impairment reserve	2,061	1,716
Related impairment reserve	497	461
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	5,888	18,619
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	770,125	652,685
Loans individually evaluated for impairment	36	85
Loans individually evaluated for impairment for which there is a related impairment reserve	36	85
Related impairment reserve	7	25
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	3,039,686	3,005,167
Loans individually evaluated for impairment	61,148	30,295
Loans individually evaluated for impairment for which there is a related impairment reserve	32,252	27,042
Related impairment reserve	3,352	2,688
Loans individually evaluated for impairment for which there is no related reserve	28,896	3,253
Commercial Banking | Commercial real estate loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	2,462,663	2,433,755
Loans individually evaluated for impairment	55,403	20,971
Loans individually evaluated for impairment for which there is a related impairment reserve	27,924	18,470
Related impairment reserve	2,877	1,859
Loans individually evaluated for impairment for which there is no related reserve	27,479	2,501
Commercial Banking | Commercial loans
Evaluation of impaired loans by portfolio segment and by class of financing receivable
Loans collectively evaluated for impairment	577,023	571,412
Loans individually evaluated for impairment	5,745	9,324
Loans individually evaluated for impairment for which there is a related impairment reserve	4,328	8,572
Related impairment reserve	475	829
Loans individually evaluated for impairment for which there is no related reserve	$ 1,417	$ 752

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Loans receivable - Roll Forward of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract	Dec. 31, 2017 USD ($)
Number of contracts
Beginning balance | contract	205	203	205	225
Number of contracts new TDRs | contract	7	6	26	13
Number of re-modified TDRs | contract	3	2	3	3
Ending balance | contract	197	201	197	201
Amount
Beginning TDR balance	$ 30,662	$ 41,860	$ 32,104	$ 42,926
New TDRs	647	546	6,443	4,685
Re-modified TDRs	306	265	306	710
Net paydowns	(1,215)	(987)	(3,037)	(3,668)
Ending TDR balance	29,147	38,469	29,147	38,469
Accruing TDRs	19,370	20,660	19,370	20,660
Non-accrual TDRs	$ 9,777	$ 17,809	$ 9,777	$ 17,809	$ 12,300
Residential mortgage loans
Number of contracts
Number of contracts charged off | contract	0	0	1	0
Number of contracts paid off | contract	2	0	4	0
Amount
Amount of contracts charged off	$ 0	$ 0	$ (135)	$ 0
Amount of contracts paid off	$ (2)	$ 0	$ (257)	$ 0
Home equity loans
Number of contracts
Number of contracts charged off | contract	0	0	0	0
Number of contracts paid off | contract	2	3	4	8
Amount
Amount of contracts charged off	$ 0	$ 0	$ 0	$ 0
Amount of contracts paid off	$ (12)	$ (30)	$ (59)	$ (62)
Commercial real estate loans
Number of contracts
Number of contracts charged off | contract	1	2	2	2
Number of contracts paid off | contract	2	1	9	11
Amount
Amount of contracts charged off	$ (91)	$ (2,498)	$ (294)	$ (2,498)
Amount of contracts paid off	$ (360)	$ (564)	$ (2,183)	$ (1,109)
Commercial loans
Number of contracts
Number of contracts charged off | contract	5	0	6	6
Number of contracts paid off | contract	3	2	8	10
Amount
Amount of contracts charged off	$ (619)	$ 0	$ (1,340)	$ (259)
Amount of contracts paid off	$ (169)	$ (123)	$ (2,401)	$ (2,256)

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Loans receivable - Troubled Debt Restructuring (Including Re-Modified TDRs) by Portfolio Segment and by Class of Financing Receivable (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	10	8	29	16
Recorded investment at the time of modification	$ 953	$ 811	$ 6,749	$ 5,395
Current recorded investment	941	807	5,756	5,029
Current allowance	$ 129	$ 154	$ 293	$ 527
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract	0	2	0	2
Recorded investment at the time of modification		$ 240		$ 240
Current recorded investment		240		240
Current allowance		$ 81		$ 81
Personal Banking
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	6	4	18	7
Recorded investment at the time of modification	$ 536	$ 525	$ 1,127	$ 1,419
Current recorded investment	535	521	1,074	1,395
Current allowance	$ 82	$ 70	$ 175	$ 158
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Personal Banking | Residential mortgage loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	2	2	6	5
Recorded investment at the time of modification	$ 342	$ 403	$ 616	$ 1,297
Current recorded investment	342	402	612	1,276
Current allowance	$ 35	$ 40	$ 62	$ 128
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Personal Banking | Home equity loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	4	2	12	2
Recorded investment at the time of modification	$ 194	$ 122	$ 511	$ 122
Current recorded investment	193	119	462	119
Current allowance	$ 47	$ 30	$ 113	$ 30
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		0		0
Recorded investment at the time of modification		$ 0		$ 0
Current recorded investment		0		0
Current allowance		$ 0		$ 0
Commercial Banking
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	4	4	11	9
Recorded investment at the time of modification	$ 417	$ 286	$ 5,622	$ 3,976
Current recorded investment	406	286	4,682	3,634
Current allowance	$ 47	$ 84	$ 118	$ 369
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		2		2
Recorded investment at the time of modification		$ 240		$ 240
Current recorded investment		240		240
Current allowance		$ 81		$ 81
Commercial Banking | Commercial real estate loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	3	2	5	6
Recorded investment at the time of modification	$ 372	$ 114	$ 3,255	$ 3,600
Current recorded investment	361	116	3,198	3,282
Current allowance	$ 42	$ 13	$ 97	$ 285
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		1		1
Recorded investment at the time of modification		$ 90		$ 90
Current recorded investment		90		90
Current allowance		$ 11		$ 11
Commercial Banking | Commercial loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	2	6	3
Recorded investment at the time of modification	$ 45	$ 172	$ 2,367	$ 376
Current recorded investment	45	170	1,484	352
Current allowance	$ 5	$ 71	$ 21	$ 84
Troubled debt restructurings modified within the previous twelve months that have subsequently defaulted:
Number of contracts | contract		1		1
Recorded investment at the time of modification		$ 150		$ 150
Current recorded investment		150		150
Current allowance		$ 70		$ 70

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Loans receivable - Troubled Debt Restructurings by Type of Modification (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($) contract
Troubled debt restructurings
Number of contracts | contract	10	8	29	16
Troubled debt restructurings	$ 941	$ 807	$ 5,756	$ 5,029
Number of re-modified TDRs | contract	3	2	3	3
Rate
Troubled debt restructurings
Troubled debt restructurings	$ 193	$ 369	$ 229	$ 479
Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	482	2,710
Maturity date
Troubled debt restructurings
Troubled debt restructurings	748	286	1,110	924
Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 152	$ 3,935	$ 916
Personal Banking
Troubled debt restructurings
Number of contracts | contract	6	4	18	7
Troubled debt restructurings	$ 535	$ 521	$ 1,074	$ 1,395
Personal Banking | Rate
Troubled debt restructurings
Troubled debt restructurings	193	369	229	479
Personal Banking | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Personal Banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	342	0	566	0
Personal Banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 152	$ 279	$ 916
Personal Banking | Residential mortgage loans
Troubled debt restructurings
Number of contracts | contract	2	2	6	5
Troubled debt restructurings	$ 342	$ 402	$ 612	$ 1,276
Personal Banking | Residential mortgage loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	250	7	360
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	342	0	519	0
Personal Banking | Residential mortgage loans | Other
Troubled debt restructurings
Troubled debt restructurings		$ 152	$ 86	$ 916
Personal Banking | Home equity loans
Troubled debt restructurings
Number of contracts | contract	4	2	12	2
Troubled debt restructurings	$ 193	$ 119	$ 462	$ 119
Personal Banking | Home equity loans | Rate
Troubled debt restructurings
Troubled debt restructurings	193	119	222	119
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	0	47	0
Personal Banking | Home equity loans | Other
Troubled debt restructurings
Troubled debt restructurings		$ 0	$ 193	$ 0
Commercial Banking
Troubled debt restructurings
Number of contracts | contract	4	4	11	9
Troubled debt restructurings	$ 406	$ 286	$ 4,682	$ 3,634
Commercial Banking | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial Banking | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	482	2,710
Commercial Banking | Maturity date
Troubled debt restructurings
Troubled debt restructurings	406	286	544	924
Commercial Banking | Other
Troubled debt restructurings
Troubled debt restructurings	$ 0	$ 0	$ 3,656	$ 0
Commercial Banking | Commercial real estate loans
Troubled debt restructurings
Number of contracts | contract	3	2	5	6
Troubled debt restructurings	$ 361	$ 116	$ 3,198	$ 3,282
Commercial Banking | Commercial real estate loans | Rate
Troubled debt restructurings
Troubled debt restructurings	0	0	0	0
Commercial Banking | Commercial real estate loans | Payment
Troubled debt restructurings
Troubled debt restructurings	0	0	482	2,710
Commercial Banking | Commercial real estate loans | Maturity date
Troubled debt restructurings
Troubled debt restructurings	361	116	361	572
Commercial Banking | Commercial real estate loans | Other
Troubled debt restructurings
Troubled debt restructurings		$ 0	$ 2,355	$ 0
Commercial Banking | Commercial loans
Troubled debt restructurings
Number of contracts | contract	1	2	6	3
Troubled debt restructurings	$ 45	$ 170	$ 1,484	$ 352
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	45	170	183	352
Commercial Banking | Commercial loans | Other
Troubled debt restructurings
Troubled debt restructurings		$ 0	$ 1,301	$ 0

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Loans receivable - Loan Delinquencies (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loan payment delinquencies
Total delinquency	$ 93,571	$ 117,504
Current	7,902,491	7,675,905
Total loans	7,996,062	7,793,409
90 days or greater delinquent and accruing	441	1,412
30-59 Days delinquent
Loan payment delinquencies
Total delinquency	22,221	56,465
60-89 Days delinquent
Loan payment delinquencies
Total delinquency	18,507	16,550
90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	52,843	44,489
Personal Banking
Loan payment delinquencies
Total loans	4,895,228	4,757,947
Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total loans	2,846,834	2,776,203
Personal Banking | Home equity loans
Loan payment delinquencies
Total loans	1,272,345	1,310,355
Personal Banking | Consumer finance loans
Loan payment delinquencies
Total loans	5,888	18,619
Personal Banking | Consumer loans
Loan payment delinquencies
Total loans	770,161	652,770
Commercial Banking
Loan payment delinquencies
Total loans	3,100,834	3,035,462
Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total loans	2,518,066	2,454,726
Commercial Banking | Commercial loans
Loan payment delinquencies
Total loans	582,768	580,736
Originated
Loan payment delinquencies
Total delinquency	76,969	98,970
Current	7,239,438	6,869,363
Total loans	7,316,407	6,968,333
90 days or greater delinquent and accruing	0	0
Originated | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	17,220	48,759
Originated | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	15,953	14,647
Originated | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	43,796	35,564
Originated | Personal Banking
Loan payment delinquencies
Total delinquency	44,240	76,209
Current	4,461,974	4,209,714
Total loans	4,506,214	4,285,923
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	17,491	42,429
Current	2,731,521	2,619,951
Total loans	2,749,012	2,662,380
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency	11,753	14,470
Current	1,036,620	1,037,088
Total loans	1,048,373	1,051,558
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Consumer finance loans
Loan payment delinquencies
Total delinquency	905	3,440
Current	4,983	15,179
Total loans	5,888	18,619
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency	14,091	15,870
Current	688,850	537,496
Total loans	702,941	553,366
90 days or greater delinquent and accruing	0	0
Originated | Personal Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	14,551	41,770
Originated | Personal Banking | 30-59 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	1,404	23,786
Originated | Personal Banking | 30-59 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	4,622	6,094
Originated | Personal Banking | 30-59 Days delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	632	2,128
Originated | Personal Banking | 30-59 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	7,893	9,762
Originated | Personal Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	9,776	12,310
Originated | Personal Banking | 60-89 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	4,392	6,030
Originated | Personal Banking | 60-89 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	2,118	2,333
Originated | Personal Banking | 60-89 Days delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	234	1,113
Originated | Personal Banking | 60-89 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	3,032	2,834
Originated | Personal Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	19,913	22,129
Originated | Personal Banking | 90 Days or greater delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	11,695	12,613
Originated | Personal Banking | 90 Days or greater delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	5,013	6,043
Originated | Personal Banking | 90 Days or greater delinquent | Consumer finance loans
Loan payment delinquencies
Total delinquency	39	199
Originated | Personal Banking | 90 Days or greater delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	3,166	3,274
Originated | Commercial Banking
Loan payment delinquencies
Total delinquency	32,729	22,761
Current	2,777,464	2,659,649
Total loans	2,810,193	2,682,410
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	29,470	18,282
Current	2,247,959	2,142,930
Total loans	2,277,429	2,161,212
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency	3,259	4,479
Current	529,505	516,719
Total loans	532,764	521,198
90 days or greater delinquent and accruing	0	0
Originated | Commercial Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	2,669	6,989
Originated | Commercial Banking | 30-59 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	2,329	5,520
Originated | Commercial Banking | 30-59 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	340	1,469
Originated | Commercial Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	6,177	2,337
Originated | Commercial Banking | 60-89 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	5,370	2,133
Originated | Commercial Banking | 60-89 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	807	204
Originated | Commercial Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	23,883	13,435
Originated | Commercial Banking | 90 Days or greater delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	21,771	10,629
Originated | Commercial Banking | 90 Days or greater delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	2,112	2,806
Acquired
Loan payment delinquencies
Total delinquency	16,602	18,534
Current	663,053	806,542
Total loans	679,655	825,076
90 days or greater delinquent and accruing	441	1,412
Acquired | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	5,001	7,706
Acquired | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	2,554	1,903
Acquired | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	9,047	8,925
Acquired | Personal Banking
Loan payment delinquencies
Total delinquency	5,599	8,711
Current	383,415	463,313
Total loans	389,014	472,024
90 days or greater delinquent and accruing	335	489
Acquired | Personal Banking | Residential mortgage loans
Loan payment delinquencies
Total delinquency	2,196	3,480
Current	95,626	110,343
Total loans	97,822	113,823
90 days or greater delinquent and accruing	329	381
Acquired | Personal Banking | Home equity loans
Loan payment delinquencies
Total delinquency	2,294	3,211
Current	221,678	255,586
Total loans	223,972	258,797
90 days or greater delinquent and accruing	0	98
Acquired | Personal Banking | Consumer loans
Loan payment delinquencies
Total delinquency	1,109	2,020
Current	66,111	97,384
Total loans	67,220	99,404
90 days or greater delinquent and accruing	6	10
Acquired | Personal Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	1,662	4,515
Acquired | Personal Banking | 30-59 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	96	1,998
Acquired | Personal Banking | 30-59 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	1,051	1,367
Acquired | Personal Banking | 30-59 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	515	1,150
Acquired | Personal Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	949	1,260
Acquired | Personal Banking | 60-89 Days delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	312	205
Acquired | Personal Banking | 60-89 Days delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	418	538
Acquired | Personal Banking | 60-89 Days delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	219	517
Acquired | Personal Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	2,988	2,936
Acquired | Personal Banking | 90 Days or greater delinquent | Residential mortgage loans
Loan payment delinquencies
Total delinquency	1,788	1,277
Acquired | Personal Banking | 90 Days or greater delinquent | Home equity loans
Loan payment delinquencies
Total delinquency	825	1,306
Acquired | Personal Banking | 90 Days or greater delinquent | Consumer loans
Loan payment delinquencies
Total delinquency	375	353
Acquired | Commercial Banking
Loan payment delinquencies
Total delinquency	11,003	9,823
Current	279,638	343,229
Total loans	290,641	353,052
90 days or greater delinquent and accruing	106	923
Acquired | Commercial Banking | Commercial real estate loans
Loan payment delinquencies
Total delinquency	9,822	8,856
Current	230,815	284,658
Total loans	240,637	293,514
90 days or greater delinquent and accruing	106	923
Acquired | Commercial Banking | Commercial loans
Loan payment delinquencies
Total delinquency	1,181	967
Current	48,823	58,571
Total loans	50,004	59,538
90 days or greater delinquent and accruing	0	0
Acquired | Commercial Banking | 30-59 Days delinquent
Loan payment delinquencies
Total delinquency	3,339	3,191
Acquired | Commercial Banking | 30-59 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	3,057	2,795
Acquired | Commercial Banking | 30-59 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	282	396
Acquired | Commercial Banking | 60-89 Days delinquent
Loan payment delinquencies
Total delinquency	1,605	643
Acquired | Commercial Banking | 60-89 Days delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	1,308	406
Acquired | Commercial Banking | 60-89 Days delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	297	237
Acquired | Commercial Banking | 90 Days or greater delinquent
Loan payment delinquencies
Total delinquency	6,059	5,989
Acquired | Commercial Banking | 90 Days or greater delinquent | Commercial real estate loans
Loan payment delinquencies
Total delinquency	5,457	5,655
Acquired | Commercial Banking | 90 Days or greater delinquent | Commercial loans
Loan payment delinquencies
Total delinquency	$ 602	$ 334

XML

Loans receivable - Credit Quality Indicators (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Credit quality indicators
Total loans	$ 7,996,062,000	$ 7,793,409,000
Pass
Credit quality indicators
Total loans	7,682,334,000	7,452,732,000
Special mention
Credit quality indicators
Total loans	78,289,000	102,834,000
Substandard
Credit quality indicators
Total loans	235,439,000	237,843,000
Doubtful
Credit quality indicators
Total loans	0	0
Loss
Credit quality indicators
Total loans	0	0
Personal Banking
Credit quality indicators
Total loans	4,895,228,000	4,757,947,000
Personal Banking | Residential mortgage loans
Credit quality indicators
Total loans	2,846,834,000	2,776,203,000
Personal Banking | Home equity loans
Credit quality indicators
Total loans	1,272,345,000	1,310,355,000
Personal Banking | Consumer finance loans
Credit quality indicators
Total loans	5,888,000	18,619,000
Personal Banking | Consumer loans
Credit quality indicators
Total loans	770,161,000	652,770,000
Commercial Banking
Credit quality indicators
Total loans	3,100,834,000	3,035,462,000
Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans	2,518,066,000	2,454,726,000
Commercial Banking | Commercial loans
Credit quality indicators
Total loans	582,768,000	580,736,000
Originated
Credit quality indicators
Total loans	7,316,407,000	6,968,333,000
Originated | Pass
Credit quality indicators
Total loans	7,057,197,000	6,682,937,000
Originated | Special mention
Credit quality indicators
Total loans	69,103,000	94,209,000
Originated | Substandard
Credit quality indicators
Total loans	190,107,000	191,187,000
Originated | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Loss
Credit quality indicators
Total loans	0	0
Originated | Personal Banking
Credit quality indicators
Total loans	4,506,214,000	4,285,923,000
Originated | Personal Banking | Pass
Credit quality indicators
Total loans	4,486,752,000	4,256,410,000
Originated | Personal Banking | Special mention
Credit quality indicators
Total loans	0	0
Originated | Personal Banking | Substandard
Credit quality indicators
Total loans	19,462,000	29,513,000
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	2,749,012,000	2,662,380,000
Originated | Personal Banking | Residential mortgage loans | Pass
Credit quality indicators
Total loans	2,739,243,000	2,645,475,000
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	9,769,000	16,905,000
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	1,048,373,000	1,051,558,000
Originated | Personal Banking | Home equity loans | Pass
Credit quality indicators
Total loans	1,042,627,000	1,042,965,000
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	5,746,000	8,593,000
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	5,888,000	18,619,000
Originated | Personal Banking | Consumer finance loans | Pass
Credit quality indicators
Total loans	5,849,000	18,420,000
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	39,000	199,000
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	702,941,000	553,366,000
Originated | Personal Banking | Consumer loans | Pass
Credit quality indicators
Total loans	699,033,000	549,550,000
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	3,908,000	3,816,000
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	2,810,193,000	2,682,410,000
Originated | Commercial Banking | Pass
Credit quality indicators
Total loans	2,570,445,000	2,426,527,000
Originated | Commercial Banking | Special mention
Credit quality indicators
Total loans	69,103,000	94,209,000
Originated | Commercial Banking | Substandard
Credit quality indicators
Total loans	170,645,000	161,674,000
Originated | Commercial Banking | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking | Loss
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking | Commercial real estate loans
Credit quality indicators
Total loans	2,277,429,000	2,161,212,000
Originated | Commercial Banking | Commercial real estate loans | Pass
Credit quality indicators
Total loans	2,083,302,000	1,964,565,000
Originated | Commercial Banking | Commercial real estate loans | Special mention
Credit quality indicators
Total loans	47,983,000	78,699,000
Originated | Commercial Banking | Commercial real estate loans | Substandard
Credit quality indicators
Total loans	146,144,000	117,948,000
Originated | Commercial Banking | Commercial real estate loans | Doubtful
Credit quality indicators
Total loans	0	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	532,764,000	521,198,000
Originated | Commercial Banking | Commercial loans | Pass
Credit quality indicators
Total loans	487,143,000	461,962,000
Originated | Commercial Banking | Commercial loans | Special mention
Credit quality indicators
Total loans	21,120,000	15,510,000
Originated | Commercial Banking | Commercial loans | Substandard
Credit quality indicators
Total loans	24,501,000	43,726,000
Originated | Commercial Banking | Commercial loans | Doubtful
Credit quality indicators
Total loans	0	0
Originated | Commercial Banking | Commercial loans | Loss
Credit quality indicators
Total loans	0	0
Acquired
Credit quality indicators
Total loans	679,655,000	825,076,000
Acquired | Pass
Credit quality indicators
Total loans	625,137,000	769,795,000
Acquired | Special mention
Credit quality indicators
Total loans	9,186,000	8,625,000
Acquired | Substandard
Credit quality indicators
Total loans	45,332,000	46,656,000
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	389,014,000	472,024,000
Acquired | Personal Banking | Pass
Credit quality indicators
Total loans	385,846,000	468,961,000
Acquired | Personal Banking | Special mention
Credit quality indicators
Total loans	0	0
Acquired | Personal Banking | Substandard
Credit quality indicators
Total loans	3,168,000	3,063,000
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	97,822,000	113,823,000
Acquired | Personal Banking | Residential mortgage loans | Pass
Credit quality indicators
Total loans	96,563,000	112,990,000
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	1,259,000	833,000
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	223,972,000	258,797,000
Acquired | Personal Banking | Home equity loans | Pass
Credit quality indicators
Total loans	222,610,000	257,312,000
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	1,362,000	1,485,000
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	67,220,000	99,404,000
Acquired | Personal Banking | Consumer loans | Pass
Credit quality indicators
Total loans	66,673,000	98,659,000
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	547,000	745,000
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	290,641,000	353,052,000
Acquired | Commercial Banking | Pass
Credit quality indicators
Total loans	239,291,000	300,834,000
Acquired | Commercial Banking | Special mention
Credit quality indicators
Total loans	9,186,000	8,625,000
Acquired | Commercial Banking | Substandard
Credit quality indicators
Total loans	42,164,000	43,593,000
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	240,637,000	293,514,000
Acquired | Commercial Banking | Commercial real estate loans | Pass
Credit quality indicators
Total loans	199,850,000	251,761,000
Acquired | Commercial Banking | Commercial real estate loans | Special mention
Credit quality indicators
Total loans	5,546,000	4,838,000
Acquired | Commercial Banking | Commercial real estate loans | Substandard
Credit quality indicators
Total loans	35,241,000	36,915,000
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	50,004,000	59,538,000
Acquired | Commercial Banking | Commercial loans | Pass
Credit quality indicators
Total loans	39,441,000	49,073,000
Acquired | Commercial Banking | Commercial loans | Special mention
Credit quality indicators
Total loans	3,640,000	3,787,000
Acquired | Commercial Banking | Commercial loans | Substandard
Credit quality indicators
Total loans	6,923,000	6,678,000
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

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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Amortizable intangible assets:
Amortization expense	$ 1,462	$ 1,691	$ 4,502	$ 5,189
Estimated amortization expense
For the year ending December 31, 2018	5,848		5,848
For the year ending December 31, 2019	4,933		4,933
For the year ending December 31, 2020	4,017		4,017
For the year ending December 31, 2021	3,188		3,188
For the year ending December 31, 2022	2,456		2,456
For the year ending December 31, 2023	1,847		1,847
Core Deposits
Amortizable intangible assets:
Intangible asset - gross	63,685		63,685		$ 63,685
Less: accumulated amortization	(43,886)		(43,886)		(40,029)
Intangible asset - net	19,799		19,799		23,656
Customer and Contract
Amortizable intangible assets:
Intangible asset - gross	10,474		10,474		10,474
Less: accumulated amortization	(9,106)		(9,106)		(8,461)
Intangible asset - net	$ 1,368		$ 1,368		$ 2,013

XML

Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 307,420	$ 307,420
Goodwill from acquisition	0	0
Balance at the end of the period	$ 307,420	$ 307,420

XML

Borrowed Funds (Details)			9 Months Ended
	Dec. 15, 2005 USD ($) $ / shares shares	Dec. 05, 2005 USD ($) $ / shares shares	Sep. 30, 2018 USD ($) trust $ / shares shares	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Number of statutory business trusts owned | trust			3
Junior subordinated debentures			$ 111,213,000	$ 111,213,000
Trust preferred investments
Debt Instrument [Line Items]
Maximum period for which interest payment on the subordinated debentures can be deferred			5 years
Interest deferral			$ 0
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)			3.78%
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)			3.71%
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)			3.81%
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 150,000,000.0
Revolving line of credit			85,200,000	0
Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Securities sold under agreements to repurchase			$ 91,800,000	$ 108,200,000

XML

Guarantees (Details) - Letter of Credit $ in Thousands	Sep. 30, 2018 USD ($)
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 33,800
Maximum exposure collateralized	27,300
Liability recognized for the obligations	$ 133

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Earnings Per Share - Narrative (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock options
Antidilutive securities excluded from the calculation of earnings per share
Average share price during the reporting period (in dollars per share)	$ 18.01	$ 16.26	$ 17.30	$ 16.58

XML

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Reported net income	$ 27,740	$ 23,591	$ 79,024	$ 72,319
Weighted average common shares outstanding (in shares)	102,334,954	101,163,534	101,937,338	100,921,322
Dilutive potential shares due to effect of stock options (in shares)	1,607,741	1,400,942	1,566,731	1,617,020
Total weighted average common shares and dilutive potential shares (in shares)	103,942,695	102,564,476	103,504,069	102,538,342
Basic earnings per share (in dollars per share)	$ 0.27	$ 0.23	$ 0.78	$ 0.72
Diluted earnings per share (in dollars per share)	$ 0.27	$ 0.23	$ 0.76	$ 0.71

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Pension and Other Post-retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension benefits
Components of net periodic benefit cost
Service cost	$ 1,716	$ 1,537	$ 5,148	$ 4,612
Interest cost	1,678	1,719	5,034	5,159
Expected return on plan assets	(2,992)	(2,628)	(8,976)	(7,884)
Amortization of prior service cost	(581)	(580)	(1,742)	(1,742)
Amortization of the net loss	872	928	2,617	2,783
Net periodic cost	693	976	2,081	2,928
Pension benefits | Minimum
Components of net periodic benefit cost
Estimated contribution for the current year	4,000		4,000
Pension benefits | Maximum
Components of net periodic benefit cost
Estimated contribution for the current year	6,000		6,000
Other post-retirement benefits
Components of net periodic benefit cost
Service cost	0	0	0	0
Interest cost	14	17	41	51
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of the net loss	24	27	73	81
Net periodic cost	$ 38	$ 44	$ 114	$ 132

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Disclosures About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Significant unrealized appreciation or depreciation in financial instruments	$ 0	$ 0
Financial assets:
Securities available-for-sale	811,556,000	792,535,000
Securities held-to-maturity	23,534,000	29,667,000
Accrued interest receivable	25,798,000	23,352,000
Interest rate swaps	4,386,000	214,000
Financial liabilities:
Borrowed funds	179,117,000	108,238,000
Junior subordinated debentures	111,213,000	111,213,000
Interest rate swaps	4,479,000	1,339,000
Level 1
Financial assets:
Cash and cash equivalents	73,946,000	77,710,000
Securities available-for-sale	0	574,000
Securities held-to-maturity	0	0
Loans receivable, net	0	3,128,000
Accrued interest receivable	25,798,000	23,352,000
Interest rate swaps		0
FHLB Stock	0	0
Total financial assets	99,744,000	104,764,000
Financial liabilities:
Savings and checking deposits	6,550,748,000	6,414,366,000
Time deposits	0	0
Borrowed funds	179,111,000	108,238,000
Junior subordinated debentures	0	0
Accrued interest payable	627,000	460,000
Total financial liabilities	6,730,486,000	6,523,064,000
Level 2
Financial assets:
Cash and cash equivalents	0	0
Securities available-for-sale	811,556,000	791,961,000
Securities held-to-maturity	23,534,000	29,667,000
Loans receivable, net	0	0
Accrued interest receivable	0	0
Interest rate swaps		214,000
FHLB Stock	0	0
Total financial assets	839,476,000	821,842,000
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	4,479,000	1,339,000
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	7,721,559,000	7,759,434,000
Accrued interest receivable	0	0
Interest rate swaps		0
FHLB Stock	15,452,000	11,733,000
Total financial assets	7,737,011,000	7,771,167,000
Financial liabilities:
Savings and checking deposits	0	0
Time deposits	1,431,500,000	1,433,380,000
Borrowed funds	0	0
Junior subordinated debentures	104,609,000	110,954,000
Accrued interest payable	0	0
Total financial liabilities	1,536,109,000	1,544,334,000
Carrying amount
Financial assets:
Cash and cash equivalents	73,946,000	77,710,000
Securities available-for-sale	811,556,000	792,535,000
Securities held-to-maturity	24,222,000	29,678,000
Loans receivable, net	7,940,087,000	7,736,614,000
Accrued interest receivable	25,798,000	23,352,000
Interest rate swaps		214,000
FHLB Stock	15,452,000	11,733,000
Total financial assets	8,895,447,000	8,671,836,000
Financial liabilities:
Savings and checking deposits	6,550,748,000	6,414,366,000
Time deposits	1,403,205,000	1,412,623,000
Borrowed funds	179,117,000	108,238,000
Junior subordinated debentures	111,213,000	111,213,000
Accrued interest payable	627,000	460,000
Total financial liabilities	8,249,389,000	8,048,239,000
Estimated fair value
Financial assets:
Cash and cash equivalents	73,946,000	77,710,000
Securities available-for-sale	811,556,000	792,535,000
Securities held-to-maturity	23,534,000	29,667,000
Loans receivable, net	7,721,559,000	7,762,562,000
Accrued interest receivable	25,798,000	23,352,000
Interest rate swaps		214,000
FHLB Stock	15,452,000	11,733,000
Total financial assets	8,676,231,000	8,697,773,000
Financial liabilities:
Savings and checking deposits	6,550,748,000	6,414,366,000
Time deposits	1,431,500,000	1,433,380,000
Borrowed funds	179,111,000	108,238,000
Junior subordinated debentures	104,609,000	110,954,000
Accrued interest payable	627,000	460,000
Total financial liabilities	8,271,074,000	8,068,737,000
Interest rate swaps
Financial liabilities:
Interest rate swaps	(93,000)
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	4,386,000
Financial liabilities:
Interest rate swaps	4,479,000	1,278,000
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	4,386,000
Financial liabilities:
Interest rate swaps	4,479,000	1,278,000
Interest rate swaps | Estimated fair value
Financial assets:
Interest rate swaps	4,386,000
Financial liabilities:
Interest rate swaps	$ 4,479,000	1,278,000
Foreign exchange swaps | Level 1
Financial liabilities:
Interest rate swaps		0
Foreign exchange swaps | Level 2
Financial liabilities:
Interest rate swaps		61,000
Foreign exchange swaps | Level 3
Financial liabilities:
Interest rate swaps		0
Foreign exchange swaps | Carrying amount
Financial liabilities:
Interest rate swaps		61,000
Foreign exchange swaps | Estimated fair value
Financial liabilities:
Interest rate swaps		$ 61,000

XML

Disclosures About Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	$ 811,556	$ 792,535
Interest rate swaps	4,386	214
Interest rate swaps	4,479	1,339
Level 1
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	574
Interest rate swaps		0
Total financial assets	99,744	104,764
Level 2
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	811,556	791,961
Interest rate swaps		214
Total financial assets	839,476	821,842
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	7,737,011	7,771,167
Measured on recurring basis
Assets and liabilities measured at fair value on a recurring basis
Total financial assets	815,942	792,749
Total Liabilities	4,479	1,339
Measured on recurring basis | Equity securities
Assets and liabilities measured at fair value on a recurring basis
Equity securities		574
Measured on recurring basis | Debt securities
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	226,796	261,235
Measured on recurring basis | Debt securities | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	14,695	1
Measured on recurring basis | Debt securities | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	186,445	209,269
Measured on recurring basis | Debt securities | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	24,744	51,056
Measured on recurring basis | Debt securities | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	912	909
Measured on recurring basis | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	584,760	530,726
Measured on recurring basis | Residential mortgage-backed securities | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	27,820	29,695
Measured on recurring basis | Residential mortgage-backed securities | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	71,251	82,969
Measured on recurring basis | Residential mortgage-backed securities | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	53,907	64,021
Measured on recurring basis | Residential mortgage-backed securities | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	535	555
Measured on recurring basis | Collateralized mortgage obligations | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	53,969	4,769
Measured on recurring basis | Collateralized mortgage obligations | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	205,066	191,512
Measured on recurring basis | Collateralized mortgage obligations | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	172,212	157,190
Measured on recurring basis | Collateralized mortgage obligations | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	15
Measured on recurring basis | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	4,386	214
Interest rate swaps	4,479	1,278
Measured on recurring basis | Foreign exchange swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps		61
Measured on recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Total financial assets	0	574
Total Liabilities	0	0
Measured on recurring basis | Level 1 | Equity securities
Assets and liabilities measured at fair value on a recurring basis
Equity securities		574
Measured on recurring basis | Level 1 | Debt securities
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Debt securities | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Debt securities | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Debt securities | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Debt securities | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 1 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Residential mortgage-backed securities | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Residential mortgage-backed securities | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Residential mortgage-backed securities | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Residential mortgage-backed securities | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Collateralized mortgage obligations | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Collateralized mortgage obligations | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Collateralized mortgage obligations | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Collateralized mortgage obligations | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 1 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	0	0
Interest rate swaps	0	0
Measured on recurring basis | Level 1 | Foreign exchange swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps		0
Measured on recurring basis | Level 2
Assets and liabilities measured at fair value on a recurring basis
Total financial assets	815,942	792,175
Total Liabilities	4,479	1,339
Measured on recurring basis | Level 2 | Equity securities
Assets and liabilities measured at fair value on a recurring basis
Equity securities		0
Measured on recurring basis | Level 2 | Debt securities
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	226,796	261,235
Measured on recurring basis | Level 2 | Debt securities | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	14,695	1
Measured on recurring basis | Level 2 | Debt securities | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	186,445	209,269
Measured on recurring basis | Level 2 | Debt securities | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	24,744	51,056
Measured on recurring basis | Level 2 | Debt securities | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	912	909
Measured on recurring basis | Level 2 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	584,760	530,726
Measured on recurring basis | Level 2 | Residential mortgage-backed securities | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	27,820	29,695
Measured on recurring basis | Level 2 | Residential mortgage-backed securities | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	71,251	82,969
Measured on recurring basis | Level 2 | Residential mortgage-backed securities | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	53,907	64,021
Measured on recurring basis | Level 2 | Residential mortgage-backed securities | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	535	555
Measured on recurring basis | Level 2 | Collateralized mortgage obligations | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	53,969	4,769
Measured on recurring basis | Level 2 | Collateralized mortgage obligations | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	205,066	191,512
Measured on recurring basis | Level 2 | Collateralized mortgage obligations | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	172,212	157,190
Measured on recurring basis | Level 2 | Collateralized mortgage obligations | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	15
Measured on recurring basis | Level 2 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	4,386	214
Interest rate swaps	4,479	1,278
Measured on recurring basis | Level 2 | Foreign exchange swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps		61
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
Measured on recurring basis | Level 3 | Equity securities
Assets and liabilities measured at fair value on a recurring basis
Equity securities		0
Measured on recurring basis | Level 3 | Debt securities
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Debt securities | U.S. government and agencies
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Debt securities | Government sponsored enterprises
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Debt securities | States and political subdivisions
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Debt securities | Corporate
Assets and liabilities measured at fair value on a recurring basis
Securities available-for-sale	0	0
Measured on recurring basis | Level 3 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Residential mortgage-backed securities | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Residential mortgage-backed securities | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Residential mortgage-backed securities | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Residential mortgage-backed securities | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Collateralized mortgage obligations | GNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Collateralized mortgage obligations | FNMA
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Collateralized mortgage obligations | FHLMC
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Collateralized mortgage obligations | Non-agency
Assets and liabilities measured at fair value on a recurring basis
Residential mortgage-backed securities:	0	0
Measured on recurring basis | Level 3 | Interest rate swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps	0	0
Interest rate swaps	$ 0	0
Measured on recurring basis | Level 3 | Foreign exchange swaps
Assets and liabilities measured at fair value on a recurring basis
Interest rate swaps		$ 0

XML

Disclosures About Fair Value of Financial Instruments - Reconciliation of all Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - Level 3 - Debt securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance January 1,	$ 0	$ 10,638	$ 0	$ 9,366
Total net realized investment gains/ (losses) and net change in unrealized appreciation/ (depreciation):
Included in net income as OTTI	0	0	0	0
Included in other comprehensive income	0	21	0	1,293
Purchases	0	0	0	0
Sales	0	0	0	0
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
September 30,	$ 0	$ 10,659	$ 0	$ 10,659

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Disclosures About Fair Value of Financial Instruments - Nonrecurring Assets that had Fair Market Values Below the Carrying Amount (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans measured for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	$ 37,932
Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	2,486
Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	99,744	$ 104,764
Level 2
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	839,476	821,842
Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	7,737,011	7,771,167
Fair Value, Measurements, Nonrecurring
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	40,418	39,087
Fair Value, Measurements, Nonrecurring | Loans measured for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	37,932	33,421
Fair Value, Measurements, Nonrecurring | Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	2,486	5,666
Fair Value, Measurements, Nonrecurring | Level 1
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	0	0
Fair Value, Measurements, Nonrecurring | Level 1 | Loans measured for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	0	0
Fair Value, Measurements, Nonrecurring | Level 1 | Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
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
Total financial assets	0	0
Fair Value, Measurements, Nonrecurring | Level 2 | Loans measured for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	0	0
Fair Value, Measurements, Nonrecurring | Level 2 | Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
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
Total financial assets	40,418	39,087
Fair Value, Measurements, Nonrecurring | Level 3 | Loans measured for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	37,932	33,421
Fair Value, Measurements, Nonrecurring | Level 3 | Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total financial assets	$ 2,486	$ 5,666

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Disclosures About Fair Value of Financial Instruments - Additional Quantitative Information, Assets Measured at Fair Value, Recurring and Nonrecurring Basis, Level 3 Input (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Loans measured for impairment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total financial assets	$ 37,932
Real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total financial assets	$ 2,486
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	0.100
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

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Derivative Financial Instruments - Narrative (Details)	9 Months Ended
	Sep. 30, 2018 USD ($) derivative	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Interest rate swaps	$ 4,479,000	$ 1,339,000
Interest rate swaps
Derivative [Line Items]
Number of agreements | derivative	1
Cash pledged as collateral to the counterparty	$ 255,000
Interest rate swaps	$ (93,000)
Trust preferred investments | Northwest Bancorp Capital Trust III | Interest rate swaps
Derivative [Line Items]
Original term of swaps	10 years
Fixed rate (as a percent)	4.09%
Trust preferred investments | Northwest Bancorp Statutory Trust IV | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 25,000,000

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Derivative Financial Instruments - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Asset Derivatives, Notional Amount	$ 209,353	$ 92,631
Asset Derivatives, Fair Value	4,386	214
Liability Derivatives, Notional Amount	234,353	154,975
Liability Derivatives, Fair Value	4,479	1,339
Interest rate swaps
Derivative [Line Items]
Liability Derivatives, Fair Value	(93)
Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Asset Derivatives, Notional Amount	0	0
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Notional Amount	25,000	50,000
Liability Derivatives, Fair Value	93	1,064
Not Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Asset Derivatives, Notional Amount	209,353	92,631
Asset Derivatives, Fair Value	4,386	214
Liability Derivatives, Notional Amount	209,353	92,631
Liability Derivatives, Fair Value	$ 4,386	214
Not Designated as Hedging Instrument | Foreign exchange swaps
Derivative [Line Items]
Asset Derivatives, Notional Amount		0
Asset Derivatives, Fair Value		0
Liability Derivatives, Notional Amount		12,344
Liability Derivatives, Fair Value		$ 61

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Derivative Financial Instruments - Gain (Loss) on Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Hedging interest rate derivatives:
Increase in interest expense	$ 257	$ 393	$ 857	$ 1,216
Non-hedging swap derivatives:
Increase/ (decrease) in other income	$ 0	$ 99	$ (288)	$ 333

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Changes in Accumulated Other Comprehensive Income/ (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Changes in accumulated other comprehensive income by component
Balance beginning of the period	$ 1,228,880	$ 1,196,930	$ 1,207,724	$ 1,170,663
Reclassification due to adoption of ASU No. 2018-02	(6,700)
Other comprehensive income/ (loss) before reclassification adjustments	(1,778)	(6)
Amounts reclassified from accumulated other comprehensive income	182	(453)
Other comprehensive income/ (loss)	(1,596)	(459)	(5,863)	2,384
Balance end of the period	1,240,676	1,205,847	1,240,676	1,205,847
Reclassification adjustment for gains included in net income, net of tax	44	674	138	741
Reclassification adjustment for gains included in net income, tax	(17)	(369)	(54)	(416)
Reclassification adjustment for prior period service costs included in net income, net of tax	226	221	678	662
Reclassification adjustment for prior period service costs included in net income, tax	90	153	271	460
Unrealized gains and (losses) on securities available-for-sale
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(10,693)	2,276	(4,409)	395
Reclassification due to adoption of ASU No. 2018-02			(991)
Other comprehensive income/ (loss) before reclassification adjustments	(1,970)	(264)	(7,169)	1,684
Amounts reclassified from accumulated other comprehensive income	(44)	(674)	(138)	(741)
Other comprehensive income/ (loss)	(2,014)	(938)	(7,307)	943
Balance end of the period	(12,707)	1,338	(12,707)	1,338
Reclassification adjustment for gains included in net income, net of tax	61	1,043	192	1,157
Reclassification adjustment for gains included in net income, tax	(17)	(369)	54	(416)
Change in fair value of interest rate swaps
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(266)	(1,257)	(691)	(1,778)
Reclassification due to adoption of ASU No. 2018-02			(149)
Other comprehensive income/ (loss) before reclassification adjustments	192	258	766	779
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Other comprehensive income/ (loss)	192	258	766	779
Balance end of the period	(74)	(999)	(74)	(999)
Change in defined benefit pension plans
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(32,134)	(26,167)	(26,980)	(26,608)
Reclassification due to adoption of ASU No. 2018-02			(5,606)
Other comprehensive income/ (loss) before reclassification adjustments	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	226	221	678	662
Other comprehensive income/ (loss)	226	221	678	662
Balance end of the period	(31,908)	(25,946)	(31,908)	(25,946)
Reclassification adjustment for prior period service costs included in net income, net of tax	581	580	1,742	1,742
Reclassification adjustment for defined benefit plan loss included in net income, net of tax	(897)	(954)	(2,691)	(2,864)
Reclassification adjustment for prior period service costs included in net income, tax	90	153	271	460
Total
Changes in accumulated other comprehensive income by component
Balance beginning of the period	(43,093)	(25,148)	(32,080)	(27,991)
Reclassification due to adoption of ASU No. 2018-02			(6,746)
Other comprehensive income/ (loss) before reclassification adjustments			(6,403)	2,463
Amounts reclassified from accumulated other comprehensive income			540	(79)
Other comprehensive income/ (loss)			(5,863)	2,384
Balance end of the period	$ (44,689)	$ (25,607)	$ (44,689)	$ (25,607)