Brookline Bancorp (BRKL) 10-K 29 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Feb. 29, 2016	Jun. 30, 2015
Document and Entity Information
Entity Registrant Name	BROOKLINE BANCORP INC
Entity Central Index Key	1,049,782
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 776.8
Entity Common Stock, Shares Outstanding		70,396,856
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks		$ 28,753	$ 36,893
Short-term investments		46,736	25,830
Total cash and cash equivalents		75,489	62,723
Investment securities available-for-sale		513,201	550,761
Investment securities held-to-maturity (fair value of $93,695 and $500, respectively)		93,757	500
Total investment securities		606,958	551,261
Loans held-for-sale		13,383	1,537
Total loans and leases		4,995,540	4,822,607
Allowance for loan and lease losses		(56,739)	(53,659)
Net loans and leases		4,938,801	4,768,948
Restricted equity securities		66,117	74,804
Premises and equipment, net of accumulated depreciation of $51,722 and $44,668, respectively		78,156	80,619
Deferred tax asset		26,817	27,687
Goodwill		137,890	137,890
Identified intangible assets, net of accumulated amortization of $29,149 and $26,238, respectively		10,633	13,544
Other real estate owned (OREO) and repossessed assets, net		1,343	1,456
Other assets	[1]	86,751	80,479
Total assets		6,042,338	5,800,948
Non-interest-bearing deposits:
Demand checking accounts		799,117	726,118
Interest-bearing deposits:
NOW accounts		283,972	235,063
Savings accounts		540,788	531,727
Money market accounts		1,594,269	1,518,490
Certificate of deposit accounts		1,087,872	946,708
Total interest-bearing deposits		3,506,901	3,231,988
Total deposits		4,306,018	3,958,106
Borrowed funds:
Advances from the Federal Home Loan Bank of Boston (FHLBB)		861,866	1,004,026
Subordinated debentures and notes		82,936	82,763
Other borrowed funds		38,227	39,615
Total borrowed funds		983,029	1,126,404
Mortgagors' escrow accounts		7,516	8,501
Accrued expenses and other liabilities		72,289	61,332
Total liabilities		$ 5,368,852	$ 5,154,343
Commitments and contingencies
Brookline Bancorp, Inc. stockholders' equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued		$ 757	$ 757
Additional paid-in capital		616,899	617,475
Retained earnings, partially restricted	[1]	109,675	84,860
Accumulated other comprehensive loss		(2,476)	(1,622)
Treasury stock, at cost; 4,861,554 shares and 5,040,571 shares, respectively		(56,208)	(58,282)
Unallocated common stock held by Employee Stock Ownership Plan (ESOP); 213,066 shares and 251,382 shares, respectively		(1,162)	(1,370)
Total Brookline Bancorp, Inc. stockholders' equity	[1]	667,485	641,818
Noncontrolling interest in subsidiary		6,001	4,787
Total stockholders' equity	[1],[2]	673,486	646,605
Total liabilities and stockholders' equity	[1]	6,042,338	5,800,948
Commercial real estate loans
ASSETS
Total loans and leases		2,664,394	2,467,801
Commercial loans and leases
ASSETS
Total loans and leases		1,374,296	1,167,094
Indirect automobile loans
ASSETS
Total loans and leases		13,678	316,987
Consumer loans
ASSETS
Total loans and leases		$ 943,172	$ 870,725
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Investment securities held to maturity, fair value	$ 93,695	$ 500
Premises and equipment, accumulated depreciation and amortization	51,722	44,668
Identified intangible assets, accumulated amortization	$ 29,149	$ 26,238
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	75,744,445	75,744,445
Treasury stock, shares	4,861,554	5,040,571
Unallocated common stock held by ESOP, shares	213,066	251,382

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and dividend income:
Loans and leases		$ 212,604	$ 206,781	$ 197,098
Debt securities		11,416	9,527	7,963
Marketable and restricted equity securities		2,762	2,072	1,212
Short-term investments		128	102	111
Total interest and dividend income		226,910	218,482	206,384
Interest expense:
Deposits		17,480	17,060	18,773
Borrowed funds		15,065	12,354	11,393
Total interest expense		32,545	29,414	30,166
Net interest income		194,365	189,068	176,218
Provision for credit losses		7,451	8,477	10,929
Net interest income after provision for credit losses		186,914	180,591	165,289
Non-interest income:
Deposit fees		8,730	8,692	8,172
Loan fees		1,186	1,010	1,415
Loan level derivative income, net		3,397	946	0
Gain on sales of investment securities, net		0	65	397
Gain on sales of loans and leases held-for-sale		2,208	1,651	794
Gain on sale/disposals of premises and equipment, net		0	1,502	0
Other		4,663	6,314	4,841
Total non-interest income	[1]	20,184	20,180	15,619
Non-interest expense:
Compensation and employee benefits		71,272	71,801	65,261
Occupancy		13,926	14,294	12,616
Equipment and data processing		14,837	17,020	16,899
Professional services		4,192	5,357	5,673
FDIC insurance		3,510	3,362	3,102
Advertising and marketing		3,352	3,058	3,003
Amortization of identified intangible assets		2,911	3,343	4,623
Other		11,377	10,925	11,265
Total non-interest expense		125,377	129,160	122,442
Income before provision for income taxes	[1]	81,721	71,611	58,466
Provision for income taxes	[1]	29,353	26,286	20,664
Net income before noncontrolling interest in subsidiary	[1],[2]	52,368	45,325	37,802
Less net income attributable to noncontrolling interest in subsidiary	[3]	2,586	2,037	1,787
Net income attributable to Brookline Bancorp, Inc.	[1],[4]	$ 49,782	$ 43,288	$ 36,015
Earnings per common share:
Basic (in dollars per share)		$ 0.71	$ 0.62	$ 0.52
Diluted (in dollars per share)		$ 0.71	$ 0.62	$ 0.52
Weighted average common shares outstanding during the year:
Basic (in shares)		70,098,561	69,945,028	69,808,164
Diluted (in shares)		70,235,868	70,054,815	69,883,924
Dividends declared per common share (in dollars per share)		$ 0.355	$ 0.34	$ 0.34
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[4]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interest in subsidiary	[1],[2]	$ 52,368	$ 45,325	$ 37,802
Other comprehensive income (loss), net of taxes:
Unrealized securities holding (losses) gains		(1,573)	10,699	(18,710)
Income tax benefit (expense)		479	(4,058)	7,275
Net unrealized securities holding (losses) gains before reclassification adjustments		(1,094)	6,641	(11,435)
Less reclassification adjustments for securities gains included in net income:
Gain on sales of securities, net		0	65	397
Income tax expense		0	(23)	(142)
Net reclassification adjustments for securities gains included in net income		0	42	255
Net unrealized securities holding (losses) gains		(1,094)	6,599	(11,690)
Postretirement benefits:
Adjustment of accumulated obligation for postretirement benefits		353	(498)	468
Income tax (expense) benefit		(113)	192	(176)
Net adjustment of accumulated obligation for postretirement benefits		240	(306)	292
Other comprehensive (loss) income, net of taxes	[3]	(854)	6,293	(11,398)
Comprehensive income	[2]	51,514	51,618	26,404
Net income attributable to noncontrolling interest in subsidiary	[3]	2,586	2,037	1,787
Comprehensive income attributable to Brookline Bancorp, Inc.	[2]	$ 48,928	$ 49,581	$ 24,617
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands		Total		Common Stock	Additional Paid-in Capital	Retained Earnings		Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Unallocated Common Stock Held by ESOP	Total Brookline Bancorp, Inc. Stockholders' Equity		Noncontrolling Interest in Subsidiary
Balance at Dec. 31, 2012		$ 615,725	[1]	$ 757	$ 618,426	$ 53,274	[1]	$ 3,483	$ (62,107)	$ (1,820)	$ 612,013	[1]	$ 3,712
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	[1]	36,015				36,015					36,015
Net income attributable to noncontrolling interest in subsidiary		1,787	[1]										1,787
Issuance of shares of common stock (10,997,840 shares)	[1]	0
Other comprehensive income (loss)		(11,398)	[1]					(11,398)			(11,398)	[1]
Common stock dividends	[1]	(23,841)				(23,841)					(23,841)
Dividend distribution to owners of noncontrolling interest in subsidiary		(1,195)	[1]										(1,195)
Compensation under recognition and retention plan		1,393	[1]		1,393						1,393	[1]
Restricted stock awards issued, net of awards surrendered		0	[1]		(2,281)				2,281
Common stock held by ESOP committed to be released		230	[1]							230	230	[1]
Balance at Dec. 31, 2013		618,716	[1]	757	617,538	65,448	[1]	(7,915)	(59,826)	(1,590)	614,412	[1]	4,304
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	[1]	43,288				43,288					43,288
Net income attributable to noncontrolling interest in subsidiary		2,037	[1]										2,037
Issuance of noncontrolling units		60	[1]										60
Other comprehensive income (loss)		6,293	[1]					6,293			6,293	[1]
Common stock dividends	[1]	(23,876)				(23,876)					(23,876)
Dividend distribution to owners of noncontrolling interest in subsidiary		(1,195)	[1]										0
Compensation under recognition and retention plan		(409)	[1]		(339)				1,544		1,205	[1]	(1,614)
Common stock held by ESOP committed to be released		496	[1]		276					220	496	[1]
Balance at Dec. 31, 2014		646,605	[1],[2]	757	617,475	84,860	[1]	(1,622)	(58,282)	(1,370)	641,818	[1]	4,787
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	[1]	49,782				49,782					49,782
Net income attributable to noncontrolling interest in subsidiary		2,586	[1]										2,586
Issuance of noncontrolling units		65	[1]										65
Other comprehensive income (loss)		(854)	[1]					(854)			(854)	[1]
Common stock dividends	[1]	(24,967)				(24,967)					(24,967)
Dividend distribution to owners of noncontrolling interest in subsidiary		(1,437)	[1]										(1,437)
Compensation under recognition and retention plan		1,311	[1]		(763)				2,074		1,311	[1]
Common stock held by ESOP committed to be released		395	[1]		187					208	395	[1]
Balance at Dec. 31, 2015		$ 673,486	[1],[2]	$ 757	$ 616,899	$ 109,675	[1]	$ (2,476)	$ (56,208)	$ (1,162)	$ 667,485	[1]	$ 6,001
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Consolidated Statements of Cha7

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Issuance of shares of common stock, shares			10,997,840
Common stock dividends, per share (in dollars per share)	$ 0.355	$ 0.34	$ 0.34
Common stock held by ESOP committed to be released, shares	38,316	40,284	38,306

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income attributable to Brookline Bancorp, Inc.	[1],[2]	$ 49,782	$ 43,288	$ 36,015
Adjustments to reconcile net income to net cash provided from operating activities:
Net income attributable to noncontrolling interest in subsidiary	[3]	2,586	2,037	1,787
Provision for credit losses		7,451	8,477	10,929
Origination of loans and leases held-for-sale		(74,841)	(21,365)	(52,485)
Proceeds from sales of loans and leases held-for-sale, net		64,398	34,717	56,326
Deferred income tax expense		1,239	125	2,398
Depreciation of premises and equipment		7,074	7,020	6,291
Amortization of investment securities premiums and discounts, net		1,841	2,656	3,200
Amortization of deferred loan and lease origination costs, net		4,775	9,890	7,749
Amortization of identified intangible assets		2,911	3,343	4,623
Amortization of debt issuance costs		100	29	0
Accretion of acquisition fair value adjustments, net		(7,242)	(11,217)	(6,193)
Gain on sales of investment securities, net		0	(65)	(397)
Gain on sales of loans and leases held-for-sale		(2,208)	(1,651)	(794)
Gain on sales/disposals of premises and equipment, net		0	(1,502)	0
Loss (gain) on sales of OREO and other repossessed assets, net		102	11	(2)
Write-down of OREO and other repossessed assets		229	381	263
Compensation under recognition and retention plans		1,276	1,205	1,393
ESOP shares committed to be released		395	496	230
Net change in:
Cash surrender value of bank-owned life insurance		(1,049)	(1,054)	(1,093)
Other assets	[2]	(5,135)	(1,700)	6,581
Accrued expenses and other liabilities		10,920	9,166	(2,804)
Net cash provided from (used for) operating activities	[2],[4]	64,604	84,287	74,017
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale		0	5,485	1,210
Proceeds from maturities, calls, and principal repayments of investment securities available-for-sale		97,771	84,091	137,275
Purchases of investment securities available-for-sale		(63,615)	(139,866)	(171,231)
Proceeds from maturities, calls, and principal repayments of investment securities held to maturity		9,579	500	0
Purchases of investment securities held-to-maturity		(102,847)	(500)	0
Proceeds from redemption of restricted equity securities (FHLBB stock)		9,924	0	2,107
Purchase of restricted equity securities		(1,237)	(8,245)	(5)
Proceeds from sales of loans and leases held-for-investment, net		273,688	0	0
Net increase in loans and leases		(457,460)	(477,128)	(219,835)
Proceeds from sales of premises and equipment		0	1,972	260
Purchase of premises and equipment, net		(4,775)	(7,782)	(16,443)
Proceeds from sale of OREO and other repossessed assets	[4]	7,152	12,317	11,857
Net cash used for investing activities	[4]	(231,820)	(529,156)	(254,805)
Cash flows from financing activities:
Increase in demand checking, NOW, savings and money market accounts		206,748	111,060	295,020
Increase (decrease) in certificates of deposit		141,338	12,271	(76,620)
Proceeds from FHLBB advances		4,018,000	2,214,931	2,363,200
Repayment of FHLBB advances		(4,157,392)	(1,976,848)	(2,381,917)
Proceeds from issuance of subordinated notes		0	73,495	0
Repayment of subordinated debentures		0	0	(3,000)
(Decrease) increase in other borrowed funds, net		(1,388)	4,996	(16,394)
(Decrease) increase in mortgagors' escrow accounts, net		(985)	612	943
Payment of dividends on common stock		(24,967)	(23,876)	(23,841)
Proceeds from issuance of noncontrolling units		65	60	0
Payment of dividends to owners of noncontrolling interest in subsidiary		(1,437)	(1,614)	(1,195)
Net cash (used for) provided from used for financing activities		179,982	415,087	156,196
Net increase (decrease) in cash and cash equivalents		12,766	(29,782)	(24,592)
Cash and cash equivalents at beginning of year		62,723	92,505	117,097
Cash and cash equivalents at end of year		75,489	62,723	92,505
Cash paid during the year for:
Interest on deposits, borrowed funds and subordinated debt		35,522	31,303	34,303
Income taxes		26,694	21,207	19,137
Non-cash investing activities:
Transfer from loans and leases to loan and leases held-for-sale		0	0	13,372
Transfer from loans to other real estate owned		$ 7,370	$ 12,587	$ 12,205
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[4]	Cash flows resulting from the sales of OREO and other repossessed assets which had been recorded as cash flows from operating activities in prior filings have been revised to cash flows from investing activities in 2015 to properly reflect the cash flow activity. There is no impact to the Company's net income or related per share amounts for the year ended December 31, 2015, 2014, and 2013.

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Overview Brookline Bancorp, Inc. (the "Company") is a bank holding company (within the meaning of the Bank Holding Company Act of 1956, as amended) and the parent of Brookline Bank, a Massachusetts-chartered savings bank; Bank Rhode Island ("BankRI"), a Rhode Island-chartered financial institution; and First Ipswich Bank ("First Ipswich"), a Massachusetts-chartered trust company (collectively referred to as the "Banks"). The Banks are all members of the Federal Reserve System. The Company is also the parent of Brookline Securities Corp. ("BSC"). The Company's primary business is to provide commercial, business and retail banking services to its corporate, municipal and individual customers through its banks and non-bank subsidiaries. Brookline Bank, which includes its wholly-owned subsidiaries BBS Investment Corp., Longwood Securities Corp. and its 84.5% -owned subsidiary, Eastern Funding LLC ("Eastern Funding"), operates 25 full-service banking offices in the greater Boston metropolitan area. BankRI, which includes its wholly-owned subsidiaries, Acorn Insurance Agency, BRI Realty Corp., Macrolease Corporation ("Macrolease"), BRI Investment Corp. and its wholly-owned subsidiary, BRI MSC Corp., operates 19 full-service banking offices in the greater Providence area. First Ipswich, which includes its wholly-owned subsidiaries, First Ipswich Insurance Agency and First Ipswich Securities II Corp. , operates 5 full-service banking offices on the north shore of eastern Massachusetts. The Company's activities include acceptance of commercial, municipal and retail deposits, origination of mortgage loans on commercial and residential real estate located principally in Massachusetts and Rhode Island, origination of commercial loans and leases to small- and mid-sized businesses, investment in debt and equity securities, and the offering of cash management and investment advisory services. The Company also provides specialty equipment financing through its subsidiaries Eastern Funding, which is based in New York City, New York, and Macrolease, which is based in Plainview, New York. The Company ceased the origination of indirect automobile loans in December 2014. The Company and the Banks are supervised, examined and regulated by the Board of Governors of the Federal Reserve System ("FRB"). As Massachusetts-chartered savings bank and trust company, Brookline Bank and First Ipswich, respectively, are also subject to regulation under the laws of the Commonwealth of Massachusetts and the jurisdiction of the Massachusetts Division of Banks. As a Rhode Island-chartered financial institution, BankRI is subject to regulation under the laws of the State of Rhode Island and the jurisdiction of the Banking Division of the Rhode Island Department of Business Regulation. The Federal Deposit Insurance Corporation ("FDIC") offers insurance coverage on all deposits up to $250,000 per depositor at each of the Banks. As FDIC-insured depository institutions, the Banks are also secondarily subject to supervision, examination and regulation by the FDIC. Additionally, as a Massachusetts-chartered savings bank, Brookline Bank is also insured by the Depositors Insurance Fund ("DIF"), a private industry-sponsored insurance company. The DIF insures savings bank deposits in excess of the FDIC insurance limits. As such, Brookline Bank offers 100% insurance on all deposits as a result of a combination of insurance from the FDIC and the DIF. Brookline Bank is required to file reports with the DIF. Basis of Financial Statement Presentation The Company's consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") as set forth by the Financial Accounting Standards Board ("FASB") in its Accounting Standards Codification and through the rules and interpretive releases of the Securities and Exchange Commission ("SEC") under the authority of federal securities laws. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances are eliminated in consolidation. In preparing these consolidated financial statements, Management is required to make significant estimates and assumptions that affect the reported amounts of assets, liabilities, income, expenses and disclosure of contingent assets and liabilities. Actual results could differ from those estimates based upon changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to significant change in the near-term include the determination of the allowance for loan and lease losses, the determination of fair market values of assets and liabilities, including acquired loans, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowance. The judgments used by Management in applying these critical accounting policies may be affected by a further and prolonged deterioration in the economic environment, which may result in changes to future financial results. For example, subsequent evaluations of the loan and lease portfolio, in light of the factors then prevailing, may result in significant changes in the allowance for loan and lease losses in future periods, and the inability to collect outstanding principal may result in increased loan and lease losses. Reclassification Certain previously reported amounts have been reclassified to conform to the current year's presentation. Except for the adoption of Accounting Standards Update ("ASU") 2014-01, there were no changes to stockholders' equity and net income reported. Refer to Note 10, " Other Assets " for the impact the adoption had on the Company's financial statements. Cash and Cash Equivalents For purposes of reporting asset balances and cash flows, cash and cash equivalents includes cash on hand and due from banks (including cash items in process of clearing), interest-bearing deposits with banks, federal funds sold, money market mutual funds and other short-term investments with original maturities of three months or less. Investment Securities Investment securities, other than those reported as short-term investments, are classified at the time of purchase as "available-for-sale," or "held-to-maturity." Classification is periodically re-evaluated for consistency with the Company's goals and objectives. Equity investments in the Federal Home Loan Bank of Boston ("FHLBB") and the Federal Reserve Bank of Boston are discussed in more detail in Note 5, "Restricted Equity Securities." Investment Securities Available-for-Sale and Held-to-Maturity Investment securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity and carried at amortized cost. Those investment securities held for indefinite periods of time but not necessarily to maturity are classified as available-for-sale. Investment securities held for indefinite periods of time include investment securities that Management intends to use as part of its asset/liability, liquidity, and/or capital management strategies and may be sold in response to changes in interest rates, maturities, asset/liability mix, liquidity needs, regulatory capital needs or other business factors. Investment securities available-for-sale are carried at estimated fair value, primarily obtained from a third-party pricing service, with unrealized gains and losses reported on an after-tax basis in stockholders' equity as accumulated other comprehensive income or loss. As of December 31, 2015 and 2014 , the Company did not make any adjustments to the prices provided by the third-party pricing service. Security transactions are recorded on the trade date. Realized gains and losses are determined using the specific identification method and are recorded in non-interest income. Interest and dividends on securities are recorded using the accrual method. Premiums and discounts on securities are amortized or accreted into interest income using the level-yield method over the remaining period to contractual maturity, adjusted for the effect of actual prepayments in the case of mortgage-backed securities ("MBSs") and collateralized mortgage obligations ("CMOs"). These estimates of prepayment assumptions are made based upon the actual performance of the underlying security, current interest rates, the general market consensus regarding changes in mortgage interest rates, the contractual repayment terms of the underlying loans, the priority rights of the investors to the cash flows from the mortgage securities and other economic conditions. When differences arise between anticipated prepayments and actual prepayments, the effective yield is recalculated to reflect actual payments to date and anticipated future payments. Unamortized premium or discount is adjusted to the amount that would have existed had the new effective yield been applied since purchase, with a corresponding charge or credit to interest income. Management evaluates securities for other-than-temporary impairment ("OTTI") on a periodic basis. Factors considered in determining whether an impairment is OTTI include: (1) the length of time and the extent to which the fair value has been less than amortized cost, (2) projected future cash flows, (3) the financial condition and near-term prospects of the issuers, and (4) the intent and ability of the Company to hold the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The Company records an OTTI loss in an amount equal to the entire difference between the fair value and amortized cost if: (1) the Company intends to sell an impaired investment security, (2) it is more likely than not that the Company will be required to sell the investment security before its amortized costs, or (3) for debt securities, the present value of expected future cash flows is not sufficient to recover the entire amortized cost basis. If an investment security is determined to be OTTI but the Company does not intend to sell the investment security, only the credit portion of the estimated loss is recognized in earnings, with the non credit portion of the loss recognized in other comprehensive income. Restricted Equity Securities The Company invests in the stock of the FHLBB, the Federal Reserve Bank of Boston and a small amount of other restricted securities. No ready market exists for these stocks, and they have no quoted market values. The Banks, as members of the FHLBB, are required to maintain investments in the capital stock of the FHLBB equal to their membership base investments plus an activity-based investment determined according to the Banks' level of outstanding FHLBB advances. Federal Reserve Bank of Boston stock was purchased at par and is redeemable at par. The Company reviews for impairment of these securities based on the ultimate recoverability of the cost basis in the stock. As of December 31, 2015 and 2014 , no impairment has been recognized. Loans Originated Loans Loans the Company originates for the portfolio, and for which it has the intent and ability to hold to maturity, are reported at amortized cost, inclusive of deferred loan origination fees and expenses, less unadvanced funds due borrowers on loans and the allowance for loan and lease losses. Interest income on loans and leases originated for the portfolio is accrued on unpaid principal balances as earned. Loan origination fees and direct loan origination costs are deferred, and the net fee or cost is recognized in interest income using the interest method. Deferred amounts are recognized for fixed-rate loans over the contractual life of the loans and for adjustable-rate loans over the period of time required to adjust the contractual interest rate to a yield approximating a market rate at the origination date. If a loan is prepaid, the unamortized portion of the loan origination costs, including third party referral related costs not subject to rebate from the dealer, is charged to income. Loans and Leases Held-for-Sale Management identifies and designates certain newly originated loans and leases for sale to specific financial institutions, subject to the underwriting criteria of those financial institutions. These loans and leases are held for sale and are carried at the lower of cost or market as determined in the aggregate. Deferred loan fees and costs are included in the determination of the gain or loss on sale. Acquired Loans Acquired loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the recorded fair value of the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairment. Valuation allowances on these impaired loans reflect only losses incurred after the acquisition (meaning the present value of all cash flows expected at acquisition that ultimately are not to be received). Nonperforming Loans Nonaccrual Loans Accrual of interest on loans generally is discontinued when contractual payment of principal or interest becomes past due 90 days or, if in Management's judgment, reasonable doubt exists as to the full timely collection of interest. Exceptions may be made if the loan has matured and is in the process of renewal or is well-secured and in the process of collection. When a loan is placed on nonaccrual status, interest accruals cease and uncollected accrued interest is reversed and charged against current interest income. Interest payments on nonaccrual loans are generally applied to principal. If collection of the principal is reasonably assured, interest payments are recognized as income on the cash basis. Loans are generally returned to accrual status when principal and interest payments are current, full collectability of principal and interest is reasonably assured and a consistent record of at least six consecutive months of performance has been achieved. Impaired Loans A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. Smaller-balance, homogeneous loans that are evaluated collectively for impairment, such as residential, home equity and other consumer loans are specifically excluded from the impaired loan portfolio except where the loan is classified as a troubled debt restructuring. The Company has defined the population of impaired loans to include nonaccrual loans and troubled debt restructured ("TDR") loans. When the ultimate collectability of the total principal of an impaired loan or lease is in doubt and the loan is on nonaccrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan or lease is not in doubt and the loan or lease is on nonaccrual status, contractual interest is credited to interest income when received, under the cash basis method. The value of an impaired loan is measured based upon the present value of expected future cash flows discounted at the loan's effective interest rate, or the fair value of the collateral if the loan is collateral-dependent and its payment is expected solely based on the underlying collateral. For impaired loans deemed collateral dependent, where impairment is measured using the fair value of the collateral, the Company will either obtain a new appraisal or use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Interest collected on impaired loans is either applied against principal or reported as income according to Management's judgment as to the collectability of principal. If Management does not consider a loan ultimately collectible within an acceptable time frame, payments are applied as principal to reduce the loan balance. If full collection of the remaining recorded investment should subsequently occur, interest receipts are recorded as interest income on a cash basis. Troubled Debt Restructured Loans In cases where a borrower experiences financial difficulties and the Company makes certain concessionary modifications to contractual terms, the loan is classified as a TDR loan. In determining whether a debtor is experiencing financial difficulties, the Company considers, among other factors, whether the debtor is in payment default or is likely to be in payment default in the foreseeable future without the modification, if the debtor declared or is in the process of declaring bankruptcy, there is substantial doubt that the debtor will continue as a going concern, the debtor's entity-specific projected cash flows will not be sufficient to service its debt, or the debtor cannot obtain funds from sources other than the existing creditors at market terms for debt with similar risk characteristics. Large groups of small-balance homogeneous loans such as residential real estate, residential construction, home equity and other consumer portfolios are collectively evaluated for impairment. As such, the Company does not typically identify individual loans within these groupings as impaired loans or for impairment evaluation and disclosure. However, the Company evaluates all TDRs for impairment on an individual loan basis regardless of loan type. Modifications may include interest-rate reductions, short-term (defined as one year or less) changes in payment structure to interest-only payments, short-term extensions of the loan's original contractual term, or less frequently, principal forgiveness, interest capitalization, forbearance and other actions intended to minimize economic loss and avoid foreclosure or repossession of collateral. Typically, TDRs are placed on nonaccrual status and reported as nonperforming loans. Generally, a nonaccrual loan that is restructured remains on nonaccrual for a period of six months to demonstrate that the borrower can meet the restructured terms; however, performance prior to the restructuring, or significant events that coincide with the restructuring, are considered in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of restructuring or after a shorter performance period. If the borrower's ability to meet the revised payment schedule is not reasonably assured, the loan remains classified as a nonaccrual loan. Loans restructured at an interest rate equal to or greater than that of a new loan with comparable risk at the time the loan agreement is modified may be excluded from restructured loan disclosures in years subsequent to the restructuring if they are in compliance with the modified terms. Allowance for Loan and Lease Losses Management has established a methodology to determine the adequacy of the allowance for loan and lease losses that assesses the risks and losses inherent in the loan and lease portfolio. Additions to the allowance for loan and lease losses are made by charges to the provision for credit losses. Losses on loans and leases are charged off against the allowance when all or a portion of a loan or lease is considered uncollectible. Subsequent recoveries on loans previously charged off, if any, are credited to the allowance when realized. Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. For purposes of determining the allowance for loan and lease losses, the Company has segmented certain loans and leases in the portfolio by product type into the following segments: (1) commercial real estate loans, (2) commercial loans and leases, (3) and consumer loans. Portfolio segments are further disaggregated into classes based on the associated risks within the segments. Commercial real estate loans are divided into three classes: commercial real estate mortgage loans, multi-family mortgage loans, and construction loans. Commercial loans and leases are divided into three classes: commercial loans which includes taxi medallion loans, equipment financing, and loans to condominium associations. Consumer loans are divided into four classes: residential mortgage loans, home equity loans, indirect automobile loans, and other consumer loans. A formula-based credit evaluation approach is applied to each group, coupled with an analysis of certain loans for impairment. The general allowance related to loans collectively evaluated for impairment is determined using a formula-based approach utilizing the risk ratings of individual credits and loss factors derived from historic portfolio loss rates, which include estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analysis which studied the time from the first indication of elevated risk of repayment (or other early event indicating a problem) to eventual charge-off to support the LEP considered in the allowance calculation. This reserving methodology established the approximate number of months of LEP that represents incurred losses for each portfolio. In addition to quantitative measures, relevant qualitative factors include, but are not limited to: (1) levels and trends in past due and impaired loans, (2) levels and trends in charge-offs, (3) changes in underwriting standards, policy exceptions, and credit policy, (4) experience of lending management and staff, (5) economic trends, (6) industry conditions, (7) effects of changes in credit concentrations, (8) interest rate environment, and (9) regulatory and other changes. The general allowance related to the acquired loans collectively evaluated for impairment is determined based upon the degree, if any, of deterioration in the pooled loans subsequent to acquisition. The qualitative factors used in the determination are the same as those used for originated loans. During 2015, the Company enhanced and refined its general allowance methodology. Under the enhanced methodology, Management combined the historical loss histories of the Banks to generate a single set of historical loss ratios. Management believes it is appropriate to aggregate the ratios as the Banks share common environmental factors, operate in similar geographic markets, and utilize common underwriting standards in accordance with the Company's Credit Policy. In prior periods, a historical loss history applicable to each Bank was used. Management employed a similar analysis for the consolidation of the qualitative factors as it did for the quantitative factors. Again, Management believes the realignment of the existing nine qualitative factors used at each of the Banks into a single group of factors used for the Company is appropriate based on the commonality of environmental factors, markets and underwriting standards among the Banks. In prior periods each of the Banks utilized a set of qualitative factors applicable to each Bank. The Company’s December 31, 2015 allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. As of December 31, 2015 , this portfolio is approximately $35.8 million . Based on industry conditions, Management established a specific loss factor for this portfolio that best represents the changing risks associated with it. Based on the refinements to the Company’s allowance methodology discussed above, Management determined that the potential risks anticipated by the unallocated allowance are now incorporated into the allowance methodology, making the unallocated allowance unnecessary. In prior periods, the unallocated allowance was used to recognize the estimated risk associated with the allocated general and specific allowances. It incorporated Management’s evaluation of existing conditions that were not included in the allocated allowance determinations and provided for losses that arise outside of the ordinary course of business. Specific valuation allowances are established for impaired originated loans with book values greater than the discounted present value of expected future cash flows or, in the case of collateral-dependent impaired loans, for any excess of a loan's book balance and the fair value of its underlying collateral. Specific valuation allowances are established for acquired loans with deterioration in the discounted present value of expected future cash flows since acquisitions or, in the case of collateral dependent impaired loans, for any increase in the excess of a loan's book balance greater than the fair value of its underlying collateral. A specific valuation allowance for losses on TDR loans is determined by comparing the net carrying amount of the troubled debt restructured loan with the restructured loan's cash flows discounted at the original effective rate. Impaired loans are reviewed quarterly with adjustments made to the calculated reserve as necessary. As of December 31, 2015 , Management believes that the methodology for calculating the allowance is sound and that the allowance provides a reasonable basis for determining and reporting on probable losses in the Company’s loan portfolios. Liability for Unfunded Commitments In the ordinary course of business, the Company enters into commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. Premises and Equipment Premises and equipment are carried at cost less accumulated depreciation and amortization, except for land which is carried at cost. Premises and equipment are depreciated using the straight-line method over the estimated useful life of the assets. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or the estimated useful life of the improvements. Costs related to internal-use software development projects that provide significant new functionality are capitalized. Internal-use software is software acquired or modified solely to meet the Company's needs and for which there is no plan to market the software externally. Direct and indirect costs associated with the application development stage of internal use software are capitalized until such time that the software is substantially complete and ready for its intended use. Capitalized costs are amortized on a straight-line basis over the remaining estimated life of the software. Computer software and development costs incurred in the preliminary project stage, as well as training and maintenance costs, are expensed as incurred. Leases The Company leases properties for offices and branches in the states of Massachusetts, Rhode Island and New York. Lease terms range from five years to over 25 years with options to renew. Management performs an analysis to determine proper lease accounting at lease inception and for each renewal. If a lease meets any of the following four criteria, the lease is classified as capital lease. The four criteria are: transfer of ownership by the end of lease term; contains bargain purchase option; lease term is at least 75% of the property’s estimated remaining economic life; or present value of the minimum lease payment is at least 90% of the fair value of the leased property. The Company did not have any capital leases as of December 31, 2015 or 2014 . All leases are classified as operating leases and rental payments are expensed as incurred. Certain leases contain rent escalation clauses which are amortized over the life of the lease under the straight-line method. Bank-Owned Life Insurance The Company acquired bank-owned life insurance ("BOLI") plans as part of its acquisitions of First Ipswich and BankRI. BOLI represents life insurance on the lives of certain current and former employees who have provided positive consent allowing their employer to be the beneficiary of such policies. BankRI and First Ipswich are the beneficiaries of their respective policies. BankRI and First Ipswich utilize BOLI as tax-efficient financing for their benefit obligations to their employees, including their retirement obligations and Supplemental Executive Retirement Plans ("SERPs"). Since BankRI and First Ipswich are the primary beneficiaries of their respective insurance policies, increases in the cash value of the policies, as well as insurance proceeds received, are recorded in non-interest income and are not subject to income taxes. BOLI is recorded at the cash value of the policies, less any applicable cash surrender charges, and is reflected as an asset in the accompanying consolidated balance sheets. Cash proceeds, if any, are classified as cash flows from investing activities. The Company reviews the financial strength of the insurance carriers prior to the purchase of BOLI to ensure minimum credit ratings of at least investment grade. The financial strength of the carriers is reviewed at least annually, and BOLI with any individual carrier is limited to 10% of the Company's capital and 25% of the Company's capital in the aggregate. Goodwill and Other Identified Intangible Assets Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired. Goodwill and indefinite-lived identified intangible assets are not subject to amortization. Definite-lived identified intangible assets are assets resulting from acquisitions that are being amortized over their estimated useful lives. The recoverability of goodwill and identified intangible assets is evaluated for impairment at least annually. As part of this evaluation, the Company makes a qualitative assessment of whether it is more likely than not that the fair value of an acquired asset is greater than its carrying amount. If the Company qualitatively concludes that it is more likely than not that the fair value of an acquired asset is greater than its carrying amount, no further testing is necessary. If, however, the Company qualitatively concludes that it is more likely than not that the fair value of an acquired asset is less than its carrying value, the Company performs a two-step quantitative impairment test to determine whether the asset is impaired. If impairment is deemed to have occurred, the amount of impairment is charged to expense when identified. The Company did not have any impairment as of December 31, 2015 and 2014 . OREO and Other Repossessed Assets OREO and other repossessed assets consists of properties acquired through foreclosure, real estate acquired through acceptance of a deed in lieu of foreclosure and loans determined to be substantively repossessed. Real estate loans that are substantively repossessed include only those loans for which the Company has taken possession of the collateral. OREO and other repossessed assets which consist of vehicles and equipment, if any, are recorded initially at estimated fair value less costs to sell, resulting in a new cost basis. The amount by which the recorded investment in the loan exceeds the fair value (net of estimated cost to sell) of the foreclosed or repossessed asset is charged to the allowance for loan and lease losses. Such evaluations are based on an analysis of individual properties/assets as well as a general assessment of current real estate market conditions. Subsequent declines in the fair value of the foreclosed or repossessed asset below the new cost basis are recorded through the use of a valuation allowance. Subsequent increases in the fair value are recorded as reduct

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions Bancorp Rhode Island, Inc. On January 1, 2012 (the "BankRI Acquisition Date"), the Company acquired all the assets and liabilities of Bancorp Rhode Island, Inc., the bank holding company for BankRI. As part of the acquisition, Bancorp Rhode Island, Inc. was merged into the Company and no longer exists as a separate entity. BankRI, a commercial bank with 19 branches serving businesses and individuals in Rhode Island and Massachusetts, continues to operate as a separate bank subsidiary of the Company. Total consideration paid in the acquisition was $205.8 million , which consisted of approximately 11 million shares of stock with a total par value of approximately $0.1 million and a fair value of $92.8 million and $113.0 million in cash. Stock consideration was paid at the rate of 4.686 shares of Brookline Bancorp common stock per share of Bancorp Rhode Island, Inc. common stock. The assets acquired and the liabilities assumed in the acquisition were recorded by the Company at their estimated fair values as of the BankRI Acquisition Date.

Cash, Cash Equivalents and Shor

Cash, Cash Equivalents and Short-Term Investments	12 Months Ended
	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Short-Term Investments	Cash, Cash Equivalents and Short-Term Investments The Banks are required to maintain average reserve balances with the Federal Reserve Bank based upon a percentage of certain of the Banks' deposits. As of December 31, 2015 and 2014 , the average amount required to be held was $6.2 million and $7.4 million , respectively. Aggregate reserve balances included in cash and cash equivalents were $45.5 million and $33.6 million , respectively, as of December 31, 2015 and 2014 . Short-term investments are summarized as follows: At December 31, 2015 2014 (In Thousands) FRB interest bearing reserve $ 34,575 $ 19,789 FHLB overnight deposits 9,573 5,708 Federal funds sold 2,588 322 Other interest bearing deposits — 11 Total short-term investments $ 46,736 $ 25,830 Short-term investments are stated at cost which approximates market value.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following tables set forth investment securities available-for-sale and held-to-maturity at the dates indicated: At December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In Thousands) Investment securities available-for-sale: Debt securities: GSEs $ 40,658 $ 141 $ 172 $ 40,627 GSE CMOs 198,000 45 4,229 193,816 GSE MBSs 230,213 1,098 1,430 229,881 SBA commercial loan asset-backed securities 148 — 1 147 Corporate debt obligations 46,160 344 18 46,486 Trust preferred securities 1,466 — 199 1,267 Total debt securities 516,645 1,628 6,049 512,224 Marketable equity securities 956 21 — 977 Total investment securities available-for-sale $ 517,601 $ 1,649 $ 6,049 $ 513,201 Investment securities held-to-maturity: GSEs $ 34,915 $ 9 $ 105 $ 34,819 GSEs MBSs 19,291 — 305 18,986 Municipal obligations 39,051 364 25 39,390 Foreign government securities 500 — — 500 Total investment securities held-to-maturity $ 93,757 $ 373 $ 435 $ 93,695 At December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In Thousands) Investment securities available-for-sale: Debt securities: GSEs $ 22,929 $ 88 $ 29 $ 22,988 GSE CMOs 238,910 80 4,821 234,169 GSE MBSs 249,329 2,531 879 250,981 SBA commercial loan asset-backed securities 205 — 2 203 Corporate debt obligations 39,805 403 1 40,207 Trust preferred securities 1,463 — 223 1,240 Total debt securities 552,641 3,102 5,955 549,788 Marketable equity securities 947 26 — 973 Total investment securities available-for-sale $ 553,588 $ 3,128 $ 5,955 $ 550,761 Investment securities held-to-maturity: Foreign government securities $ 500 $ — $ — $ 500 Total investment securities held-to-maturity $ 500 $ — $ — $ 500 As of December 31, 2015 , the fair value of all investment securities available-for-sale was $513.2 million , with net unrealized losses of $4.4 million , compared to a fair value of $550.8 million and net unrealized losses of $2.8 million as of December 31, 2014 . As of December 31, 2015 , $368.6 million , or 71.8% of the portfolio, had gross unrealized losses of $6.0 million , compared to $ 335.7 million , or 60.9% of the portfolio, with gross unrealized losses of $6.0 million as of December 31, 2014 . As of December 31, 2015 , the fair value of all investment securities held-to-maturity was $93.7 million , with net unrealized losses of $62.0 thousand , compared to a fair value of $0.5 million with no unrealized gains as of December 31, 2014 . As of December 31, 2015 , $52.3 million , or 55.8% of the portfolio, had gross unrealized losses of $0.4 million . There were no investment securities held-to-maturity with net unrealized losses as of December 31, 2014 . Investment Securities as Collateral As of December 31, 2015 and 2014 , respectively, $486.4 million and $473.1 million of investment securities were pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of December 31, 2015 and 2014 . Other-Than-Temporary Impairment ("OTTI") Investment securities as of December 31, 2015 and 2014 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows: At December 31, 2015 Less than Twelve Months Twelve Months or Longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (In Thousands) Investment securities available-for-sale: GSEs $ 19,633 $ 172 $ — $ — $ 19,633 $ 172 GSE CMOs 89,680 1,294 100,473 2,935 190,153 4,229 GSE MBSs 133,779 845 16,968 585 150,747 1,430 SBA commercial loan asset-backed securities — — 139 1 139 1 Corporate debt obligations 6,181 18 — — 6,181 18 Trust preferred securities — — 1,267 199 1,267 199 Temporarily impaired debt securities available-for-sale 249,273 2,329 118,847 3,720 368,120 6,049 Investment securities held-to-maturity: GSEs 25,837 105 — — 25,837 105 GSEs MBSs 18,834 305 — — 18,834 305 Municipal obligations 7,629 25 — — 7,629 25 Temporarily impaired debt securities held-to-maturity 52,300 435 — — 52,300 435 Total temporarily impaired securities $ 301,573 $ 2,764 $ 118,847 $ 3,720 $ 420,420 $ 6,484 At December 31, 2014 Less than Twelve Months Twelve Months or Longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (In Thousands) Investment securities available-for-sale: GSEs $ 11,086 $ 29 $ — $ — $ 11,086 $ 29 GSE CMOs 39,095 179 190,345 4,642 229,440 4,821 GSE MBSs 50,099 84 39,555 795 89,654 879 SBA commercial loan asset-backed securities 8 — 186 2 194 2 Corporate debt obligations 4,069 1 — — 4,069 1 Trust preferred securities and pools — — 1,240 223 1,240 223 Total temporarily impaired investment securities available-for-sale $ 104,357 $ 293 $ 231,326 $ 5,662 $ 335,683 $ 5,955 The Company performs regular analysis on the investment securities available-for-sale portfolio to determine whether a decline in fair value indicates that an investment security is OTTI. In making these OTTI determinations, Management considers, among other factors, the length of time and extent to which the fair value has been less than amortized cost; projected future cash flows; credit subordination and the creditworthiness; capital adequacy and near-term prospects of the issuers. Management also considers the Company's capital adequacy, interest-rate risk, liquidity and business plans in assessing whether it is more likely than not that the Company will sell or be required to sell the investment securities before recovery. If the Company determines that a decline in fair value is OTTI and that it is more likely than not that the Company will not sell or be required to sell the investment security before recovery of its amortized cost, the credit portion of the impairment loss is recognized in the Company's consolidated statement of income and the noncredit portion is recognized in accumulated other comprehensive income. The credit portion of the OTTI impairment represents the difference between the amortized cost and the present value of the expected future cash flows of the investment security. If the Company determines that a decline in fair value is OTTI and it is more likely than not that it will sell or be required to sell the investment security before recovery of its amortized cost, the entire difference between the amortized cost and the fair value of the security will be recognized in the Company's consolidated statement of income. Investment Securities Available-For-Sale Impairment Analysis The following discussion summarizes, by investment security type, the basis for evaluating if the applicable investment securities within the Company’s available-for-sale portfolio were OTTI as of December 31, 2015 . Based on the analysis below and the determination that, it is more likely than not that the Company will not sell or be required to sell the investment securities before recovery of its amortized cost. The Company's ability and intent to hold these investment securities until recovery is supported by the Company's strong capital and liquidity positions as well as its historically low portfolio turnover. As such, Management has determined that the investment securities are not OTTI as of December 31, 2015 . If market conditions for investment securities worsen or the creditworthiness of the underlying issuers deteriorates, it is possible that the Company may recognize additional OTTI in future periods. U.S. Government-Sponsored Enterprises The Company invests in securities issued by U.S. Government-sponsored enterprises ("GSEs"), including GSE debt securities, mortgage-backed securities ("MBSs"), and collateralized mortgage obligations ("CMOs"). GSE securities include obligations issued by the Federal National Mortgage Association ("FNMA"), the Federal Home Loan Mortgage Corporation ("FHLMC"), the Government National Mortgage Association ("GNMA"), the Federal Home Loan Banks ("FHLB") and the Federal Farm Credit Bank. As of December 31, 2015 , only GNMA MBSs and CMOs, and Small Business Administration ("SBA") commercial loan asset-backed securities with an estimated fair value of $21.8 million were backed explicitly by the full faith and credit of the U.S. Government, compared to $26.2 million as of December 31, 2014 . As of December 31, 2015 , the Company owned GSE debentures with a total fair value of $40.6 million , which approximated amortized cost. As of December 31, 2014 , the Company held GSE debentures with a total fair value of $23.0 million , which approximated amortized cost. As of December 31, 2015 , seven of the thirteen securities in this portfolio were in unrealized loss positions. As of December 31, 2014 , four of the eight securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA/SBA) guarantee of the U.S Government. For the year ended December 31, 2015 , the Company purchased a total of $24.9 million GSE debentures. This compares to $21.0 million purchased during the same period in 2014 . As of December 31, 2015 , the Company owned GSE mortgage-related securities with a total fair value of $423.7 million and a net unrealized loss of $4.5 million . This compares to a total fair value of $485.2 million and a net unrealized loss of $3.1 million as of December 31, 2014 . As of December 31, 2015 , 101 of the 249 securities in this portfolio were in unrealized loss positions. As of December 31, 2014 , 79 of the 250 securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the years ended December 31, 2015 and 2014 , the Company purchased a total of $29.5 million and $106.9 million , respectively, in GSE CMOs and GSE MBSs. SBA Commercial Loan Asset-Backed As of December 31, 2015 and December 31, 2014 , the Company owned SBA securities with a total fair value of $0.1 million and $0.2 million , respectively, which approximated amortized cost. As of December 31, 2015 , six of the seven securities in this portfolio were in unrealized loss positions. As of December 31, 2014 , seven of the eight securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the explicit (SBA) guarantee of the U.S Government. Corporate Obligations From time to time, the Company may invest in high-quality corporate obligations to provide portfolio diversification and improve the overall yield on the portfolio. The Company owned fifteen corporate obligation securities with a total fair value of $46.5 million and a net unrealized gain of $0.3 million as of December 31, 2015 . This compares to thirteen corporate obligation securities with a total fair value of $40.2 million and a net unrealized gain of $0.4 million as of December 31, 2014 . As of December 31, 2015 , two of the fifteen securities in this portfolio were in an unrealized loss position. As of December 31, 2014 , one of the thirteen securities in this portfolio was in an unrealized loss position. Full collection of the obligations is expected because the financial condition of the issuers is sound, they have not defaulted on scheduled payments, the obligations are rated investment grade, and the Company has the ability and intent to hold the obligations for a period of time to recover the amortized cost. For the year ended December 31, 2015 , the Company purchased $9.3 million in corporate obligations compared to $12.0 million in the same period in 2014 . Trust Preferred Securities Trust preferred securities represent subordinated debt issued by financial institutions. As of December 31, 2015 , the Company owned two trust preferred securities with a total fair value of $1.3 million and a net unrealized loss of $0.2 million . This compares to two trust preferred securities with a total fair value of $1.2 million and a net unrealized loss of $0.2 million as of December 31, 2014 . As of December 31, 2015 and 2014 , both of the securities in this portfolio were in unrealized loss positions. Full collection of the obligations is expected because the financial condition of the issuers is sound, neither of the issuers has defaulted on scheduled payments, the obligations are rated investment grade, and the Company has the ability and intent to hold the obligations for a period of time to recover the amortized cost. Marketable Equity Securities As of December 31, 2015 , the Company owned marketable equity securities with a fair value of $1.0 million , which approximated amortized cost, compared to a fair value of $1.0 million , which approximated cost as of December 31, 2014 . As of December 31, 2015 , none of the two securities in this portfolio were in unrealized loss positions. As of December 31, 2014 , none of the four securities in this portfolio were in unrealized loss positions. Investment Securities Held-to-Maturity Impairment Analysis U.S. Government-Sponsored Enterprises The Company invests in securities issued by U.S. Government-sponsored enterprises ("GSEs") including GSE debt securities, mortgage-backed securities ("MBSs"), and collateralized mortgage obligations ("CMOs"). GSE securities include obligations issued by the Federal National Mortgage Association ("FNMA"), the Federal Home Loan Mortgage Corporation ("FHLMC"), the Government National Mortgage Association ("GNMA"), the Federal Home Loan Banks ("FHLB"), and the Federal Farm Credit Bank. As of December 31, 2015 , the Company owned GSE debentures and GSE MBS with a total fair value of $34.8 million and $19.0 million , respectively. As of December 31, 2015 , the Company owned GSE mortgage-related securities with a total amortized cost of $19.3 million . As of December 31, 2014, the Company did not own any GSE mortgage-related securities. During the year ended December 31, 2015 , the Company purchased a total of $42.4 million and $21.3 million , in GSEs and GSE MBSs, respectively. As of December 31, 2015 , 16 of the 22 securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. Municipal Obligations As of December 31, 2015 , the Company owned 72 municipal obligation securities with a total fair value and total amortized cost of $39.4 million and 39.1 million , respectively. As of December 31, 2014, the Company did not own any municipal obligation securities. During the year ended December 31, 2015 , the Company purchased a total of $39.2 million of municipal obligations. During the year ended December 31, 2014 , the Company did not purchase any municipal obligations. As of December 31, 2015 , 15 the 72 securities in this portfolio were in unrealized loss positions. Foreign Government Obligations As of December 31, 2015 and December 31, 2014 , the Company owned one foreign government obligation security with a fair value and amortized cost of $0.5 million . As of December 31, 2015 and December 31, 2014 , the security was not in an unrealized loss position. During the year ended December 31, 2015 , the Company did not purchase any foreign government obligation securities. During the year ended December 31, 2014 , the Company purchased $0.5 million of foreign government obligation securities. Portfolio Maturities The final stated maturities of the debt securities are as follows at the dates indicated: At December 31, 2015 2014 Amortized Cost Estimated Fair Value Weighted Average Rate Amortized Cost Estimated Fair Value Weighted Average Rate (Dollars in Thousands) Investment securities available-for-sale: Within 1 year $ 2,999 $ 3,003 2.09 % $ 3,057 $ 3,081 3.00 % After 1 year through 5 years 59,729 60,249 2.32 % 55,631 56,586 2.48 % After 5 years through 10 years 100,658 100,833 2.05 % 103,268 104,208 2.00 % Over 10 years 353,259 348,139 1.97 % 390,685 385,913 1.91 % $ 516,645 $ 512,224 2.03 % $ 552,641 $ 549,788 1.99 % Investment securities held-to-maturity: Within 1 year $ 651 $ 651 1.00 % $ — $ — — % After 1 year through 5 years 23,888 23,866 1.52 % 500 500 1.30 % After 5 years through 10 years 50,078 50,344 2.00 % $ — $ — — % Over 10 years 19,140 18,834 1.82 % $ — $ — — % $ 93,757 $ 93,695 1.83 % $ 500 $ 500 — % Actual maturities of debt securities will differ from those presented above since certain obligations amortize and may also provide the issuer the right to call or prepay the obligation prior to scheduled maturity without penalty. MBSs and CMOs are included above based on their final stated maturities; the actual maturities, however, may occur earlier due to anticipated prepayments and stated amortization of cash flows. As of December 31, 2015 , issuers of debt securities with an estimated fair value of $48.5 million had the right to call or prepay the obligations. Of the $48.5 million , approximately $15.5 million matures in 1 - 5 years, $31.8 million matures in 6 - 10 years, and $1.3 million matures after ten years. As of December 31, 2014 , issuers of debt securities with an estimated fair value of approximately $16.1 million had the right to call or prepay the obligations. Of the $16.1 million , $5.0 million matures in 1-5 years, $9.9 million matures in 6-10 years, and $1.2 million matures after ten years. Security Sales Security transactions are recorded on the trade date. When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. Sales of investment securities are summarized as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Sales of debt securities $ — $ 5,084 $ 1,210 Sales of marketable equity securities — 401 — Gross gains from sales — 380 626 Gross losses from sales — 315 229 Gain on sales of securities, net $ — $ 65 $ 397

Restricted Equity Securities

Restricted Equity Securities	12 Months Ended
	Dec. 31, 2015
Restricted Investments Note [Abstract]
Restricted Equity Securities	Restricted Equity Securities Investments in the restricted equity securities of various entities are as follows: At December 31, 2015 2014 (In Thousands) FHLBB stock $ 48,890 $ 58,326 Federal Reserve Bank of Boston stock 16,752 16,003 Other restricted equity securities 475 475 $ 66,117 $ 74,804 The Company invests in the stock of FHLBB as one of the requirements to borrow. As of December 31, 2015 and 2014 , FHLBB stock is recorded at its carrying value, which is equal to cost and which Management believes approximates its fair value. The FHLBB stated that it remained in compliance with all regulatory capital ratios as of December 31, 2015 and was classified as "adequately capitalized" by its regulator, based on the FHLBB's financial information as of September 30, 2015. The FHLBB paid a dividend to member banks at an annualized rate of 254 basis points in 2015. The FHLBB increased its dividend from 174 basis points in the first quarter of 2015 to 332 basis points in the fourth quarter of 2015 . As of December 31, 2015 , the Company's investment in FHLBB stock exceeded its required investment which provides for additional borrowing capacity. The Company invests in the stock of the Federal Reserve Bank of Boston as required by its the Banks' membership in the Federal Reserve system. As of December 31, 2015 and 2014 , Federal Reserve Bank of Boston stock is recorded at its carrying value, which is equal to cost and which Management believes approximates its fair value.

Loans and Leases

Loans and Leases	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans and Leases	Loans and Leases The following tables present loan and lease balances and weighted average coupon rates for the originated and acquired loan and lease portfolios at the dates indicated: At December 31, 2015 Originated Acquired Total Balance Weighted Average Coupon Balance Weighted Average Coupon Balance Weighted Average Coupon (Dollars In Thousands) Commercial real estate loans: Commercial real estate $ 1,684,548 4.00 % $ 191,044 4.15 % $ 1,875,592 4.02 % Multi-family mortgage 620,865 3.92 % 37,615 4.35 % 658,480 3.94 % Construction 129,742 3.60 % 580 5.08 % 130,322 3.61 % Total commercial real estate loans 2,435,155 3.96 % 229,239 4.19 % 2,664,394 3.98 % Commercial loans and leases: Commercial 576,599 3.90 % 15,932 5.65 % 592,531 3.95 % Equipment financing 712,988 7.05 % 8,902 6.14 % 721,890 7.04 % Condominium association 59,875 4.50 % — — % 59,875 4.50 % Total commercial loans and leases 1,349,462 5.59 % 24,834 5.83 % 1,374,296 5.59 % Indirect automobile loans 13,678 5.53 % — — % 13,678 5.53 % Consumer loans: Residential mortgage 527,846 3.64 % 88,603 3.85 % 616,449 3.67 % Home equity 234,708 3.35 % 79,845 3.99 % 314,553 3.51 % Other consumer 12,039 4.77 % 131 17.40 % 12,170 4.91 % Total consumer loans 774,593 3.57 % 168,579 3.93 % 943,172 3.63 % Total loans and leases $ 4,572,888 4.38 % $ 422,652 4.18 % $ 4,995,540 4.36 % At December 31, 2014 Originated Acquired Total Balance Weighted Average Coupon Balance Weighted Average Coupon Balance Weighted Average Coupon (Dollars In Thousands) Commercial real estate loans: Commercial real estate $ 1,425,621 4.18 % $ 254,461 4.29 % $ 1,680,082 4.20 % Multi-family mortgage 576,214 4.11 % 63,492 4.50 % 639,706 4.15 % Construction 146,074 3.79 % 1,939 5.50 % 148,013 3.81 % Total commercial real estate loans 2,147,909 4.13 % 319,892 4.34 % 2,467,801 4.16 % Commercial loans and leases: Commercial 462,730 3.88 % 51,347 4.14 % 514,077 3.91 % Equipment financing 587,496 6.92 % 13,928 6.22 % 601,424 6.90 % Condominium association 51,593 4.60 % — — % 51,593 4.60 % Total commercial loans and leases 1,101,819 5.53 % 65,275 4.58 % 1,167,094 5.48 % Indirect automobile loans 316,987 4.47 % — — % 316,987 4.47 % Consumer loans: Residential mortgage 472,078 3.60 % 99,842 3.77 % 571,920 3.63 % Home equity 181,580 3.35 % 105,478 3.85 % 287,058 3.53 % Other consumer 11,580 5.13 % 167 16.35 % 11,747 5.29 % Total consumer loans 665,238 3.56 % 205,487 3.82 % 870,725 3.62 % Total loans and leases $ 4,231,953 4.43 % $ 590,654 4.19 % $ 4,822,607 4.40 % The net unamortized deferred loan origination fees and costs included in total loans and leases were $12.8 million and $15.0 million as of December 31, 2015 and 2014 , respectively. The Company's Banks and subsidiaries lend primarily in eastern Massachusetts, southern New Hampshire and Rhode Island, with the exception of equipment financing, 32.8% of which is in the greater New York and New Jersey metropolitan area and 67.2% of which is in other areas in the United States of America as of December 31, 2015 , as compared to 35.9% of which is in the greater New York and New Jersey metropolitan area and 64.1% of which is in other areas in the United States of America as of December 31, 2014 . Competition for indirect automobile loans increased significantly in recent years as credit unions and large national banks entered indirect automobile lending. That competition drove interest rates down and, in some cases, changed the manner in which interest rates are developed, from including a dealer-shared spread to imposing a dealer-based fee to originate the loan. Given this market condition, Management ceased the Company's origination of indirect automobile loans in December 2014. For the quarter ended March 31, 2015, the Company sold over 90% of the portfolio for $255.2 million , which resulted in a loss of $11.8 thousand excluding the impact on the allowance for loan and lease losses. Refer to Note 7, " Allowance for Loan and Lease Losses " for the impact of the sale on the Company's allowance for loan and lease losses. Accretable Yield for the Acquired Loan Portfolio The following table summarizes activity in the accretable yield for the acquired loan portfolio for the periods indicated: Year Ended December 31, 2015 2014 2013 (In Thousands) Balance at beginning of year $ 32,044 $ 45,789 $ 57,812 Accretion (10,467 ) (15,805 ) (20,500 ) Reclassification from nonaccretable difference for loans with improved cash flows 4,483 2,060 8,477 Changes in expected cash flows that do not affect nonaccretable difference (1) (5,264 ) — — Balance at end of year $ 20,796 $ 32,044 $ 45,789 (1) Represents changes in interest cash flows due to changes in interest rates on variable rate loans. On a quarterly basis, subsequent to acquisition, Management reforecasts the expected cash flows for acquired ASC 310-30 loans, taking into account prepayment speeds, probability of default and loss given defaults. Management compares cash flow projections per the reforecast to the original cash flow projections and determines whether any reduction in cash flow expectations are due to deterioration, or if the change in cash flow expectation is related to noncredit events. This cash flow analysis is used to evaluate the need for a provision for loan and lease losses and/or prospective yield adjustments. During the years ended December 31, 2015 , 2014 and 2013 , accretable yield adjustments totaling $4.5 million , $2.1 million , and $ 8.5 million , respectively, were made for certain loan pools. These accretable yield adjustments, which are subject to continued re-assessment, will be recognized over the remaining lives of those pools. The aggregate remaining nonaccretable difference applicable to acquired loans and leases totaled $2.9 million and $3.6 million as of December 31, 2015 and 2014 , respectively. Related Party Loans The Banks' authority to extend credit to their respective directors and executive officers, as well as to entities controlled by such persons, is currently governed by the requirements of the Sarbanes-Oxley Act and Regulation O of the FRB. Among other things, these provisions require that extensions of credit to insiders (1) be made on terms that are substantially the same as, and follow credit underwriting procedures that are not less stringent than, those prevailing for comparable transactions with unaffiliated persons and that do not involve more than the normal risk of repayment or present other unfavorable features; and (2) not exceed certain limitations on the amount of credit extended to such persons, individually and in the aggregate, which limits are based, in part, on the amount of the Banks' capital. In addition, the extensions of credit to insiders must be approved by the applicable Bank's Board of Directors. The following table summarizes the change in the total amounts of loans and advances, to directors, executive officers and their affiliates for the periods indicated. All loans were performing as of December 31, 2015 . Year Ended December 31, 2015 2014 (In Thousands) Balance at beginning of year $ 8,574 $ 4,783 New loans granted during the year 9,931 2,375 Loans reclassified as insider loans 21,481 — Advances on lines of credit 840 1,787 Repayments (1,344 ) (182 ) Loan no longer classified as an insider loan (2,107 ) (189 ) Balance at end of year $ 37,375 $ 8,574 Unfunded commitments on extensions of credit to insiders totaled $14.8 million and $11.7 million as of December 31, 2015 and 2014 , respectively. Loans and Leases Pledged as Collateral As of December 31, 2015 and 2014 , there were $1.8 billion and $1.6 billion , respectively, of loans and leases pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of December 31, 2015 and 2014 .

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses The following tables present the changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment for the periods indicated: Year Ended December 31, 2015 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2014 $ 29,594 $ 15,957 $ 2,331 $ 3,359 $ 2,418 $ 53,659 Charge-offs (550 ) (3,634 ) (1,788 ) (582 ) — (6,554 ) Recoveries — 667 1,442 102 — 2,211 Provision (credit) for loan and lease losses 1,107 9,028 (1,716 ) 1,422 (2,418 ) 7,423 Balance at December 31, 2015 $ 30,151 $ 22,018 $ 269 $ 4,301 $ — $ 56,739 Year Ended December 31, 2014 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2013 $ 23,022 $ 15,220 $ 3,924 $ 3,375 $ 2,932 $ 48,473 Charge-offs (130 ) (2,507 ) (1,163 ) (650 ) — (4,450 ) Recoveries 4 801 434 158 — 1,397 Provision (credit) for loan and lease losses 6,698 2,443 (864 ) 476 (514 ) 8,239 Balance at December 31, 2014 $ 29,594 $ 15,957 $ 2,331 $ 3,359 $ 2,418 $ 53,659 Year Ended December 31, 2013 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2012 $ 20,018 $ 10,655 $ 5,304 $ 2,545 $ 2,630 $ 41,152 Charge-offs (88 ) (2,077 ) (1,714 ) (909 ) — (4,788 ) Recoveries 13 657 501 263 — 1,434 Provision (credit) for loan and lease losses 3,079 5,985 (167 ) 1,476 302 10,675 Balance at December 31, 2013 $ 23,022 $ 15,220 $ 3,924 $ 3,375 $ 2,932 $ 48,473 The liability for unfunded credit commitments, which is included in other liabilities, was $1.3 million , $1.3 million and $1.0 million at December 31, 2015 , 2014 and 2013 , respectively. The changes in the liability for unfunded credit commitments reflect changes in the estimate of loss exposure associated with certain unfunded credit commitments. No credit commitments were charged off against the liability account in the years ended December 31, 2015 , 2014 and 2013 . Provision for Credit Losses The provisions for credit losses are set forth below for the periods indicated: Originated Acquired Total Year Ended December 31, Year Ended December 31, Year Ended December 31, 2015 2014 2013 2015 2014 2013 2015 2014 2013 (In Thousands) Provision (credit) for loan and lease losses: Commercial real estate $ 1,459 $ 5,009 $ 2,563 $ (352 ) $ 1,689 $ 516 $ 1,107 $ 6,698 $ 3,079 Commercial 9,077 2,030 4,917 (49 ) 413 1,068 9,028 2,443 5,985 Indirect automobile (1,716 ) (864 ) (167 ) — — — (1,716 ) (864 ) (167 ) Consumer 953 417 286 469 59 1,190 1,422 476 1,476 Unallocated (2,418 ) (514 ) 302 — — — (2,418 ) (514 ) 302 Total provision for loan and lease losses 7,355 6,078 7,901 68 2,161 2,774 7,423 8,239 10,675 Unfunded credit commitments 28 238 254 — — — 28 238 254 Total provision for credit losses $ 7,383 $ 6,316 $ 8,155 $ 68 $ 2,161 $ 2,774 $ 7,451 $ 8,477 $ 10,929 Allowance for Loan and Lease Losses Methodology Management has established a methodology to determine the adequacy of the allowance for loan and lease losses that assesses the risks and losses inherent in the loan and lease portfolio. Additions to the allowance for loan and lease losses are made by charges to the provision for credit losses. Losses on loans and leases are charged off against the allowance when all or a portion of a loan or lease is considered uncollectible. Subsequent recoveries on loans previously charged off, if any, are credited to the allowance when realized. Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. For purposes of determining the allowance for loan and lease losses, the Company has segmented certain loans and leases in the portfolio by product type into the following segments: (1) commercial real estate loans, (2) commercial loans and leases, (3) consumer loans. Portfolio segments are further disaggregated into classes based on the associated risks within the segments. Commercial real estate loans are divided into three classes: commercial real estate loans, multi-family mortgage loans, and construction loans. Commercial loans and leases are divided into three classes: commercial loans which includes taxi medallion loans, equipment financing, and loans to condominium associations. Consumer loans are divided into four classes: residential mortgage loans, home equity loans, indirect automobile loans, and other consumer loans. A formula-based credit evaluation approach is applied to each group, coupled with an analysis of certain loans for impairment. For each class of loan, Management makes significant judgments in selecting the estimation method that fits the credit characteristics of its class and portfolio segment as set forth below. Also refer to Note 1, "Basis of Presentation," in the consolidated financial statements for more information on the Company's allowance of loan and lease losses methodology. The general allowance related to loans collectively evaluated for impairment is determined using a formula-based approach utilizing the risk ratings of individual credits and loss factors derived from historic portfolio loss rates, which include estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analysis which studied the time from the first indication of elevated risk of repayment (or other early event indicating a problem) to eventual charge-off to support the LEP considered in the allowance calculation. This reserving methodology established the approximate number of months of LEP that represents incurred losses for each portfolio. In addition to quantitative measures, relevant qualitative factors include, but are not limited to: (1) levels and trends in past due and impaired loans, (2) levels and trends in charge-offs, (3) changes in underwriting standards, policy exceptions, and credit policy, (4) experience of lending management and staff, (5) economic trends, (6) industry conditions, (7) effects of changes in credit concentrations, (8) interest rate environment, and (9) regulatory and other changes. The general allowance related to the acquired loans collectively evaluated for impairment is determined based upon the degree, if any, of deterioration in the pooled loans subsequent to acquisition. The qualitative factors used in the determination are the same as those used for originated loans. During the third quarter of 2015, the Company enhanced and refined its general allowance methodology to provide further quantification of probable losses in the portfolio. Under the enhanced methodology, Management combined the historical loss histories of the Banks to generate a single set of ratios. Management believes it is appropriate to aggregate the ratios as the Banks share common environmental factors, operate in similar geographic markets, and utilize common underwriting standards in accordance with the Company's Credit Policy. In prior periods, a historical loss history applicable to each Bank was used. Management employed a similar analysis for the consolidation of the qualitative factors as it did for the quantitative factors. Again, Management believes the realignment of the existing nine qualitative factors used at each of the Banks into a single group of factors for use across the Company is appropriate based on the commonality of environmental factors, markets and underwriting standards among the Banks. In prior periods each of the Banks utilized a set of qualitative factors applicable to each Bank. The Company’s December 31, 2015 allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. As of December 31, 2015 , this portfolio is approximately $35.8 million . Based on industry conditions, Management established a specific loss factor for this portfolio that best represents the changing risks associated with it. Based on the refinements to the Company’s allowance methodology discussed above, Management determined that the potential risks anticipated by the unallocated allowance are now incorporated into the allowance methodology, making the unallocated allowance unnecessary. In prior periods, the unallocated allowance was used to recognize the estimated risk associated with the allocated general and specific allowances. It incorporated Management’s evaluation of existing conditions that were not included in the allocated allowance determinations and provided for losses that arise outside of the ordinary course of business. Specific valuation allowances are established for impaired originated loans with book values greater than the discounted present value of expected future cash flows or, in the case of collateral-dependent impaired loans, for any excess of a loan's book balance and the fair value of its underlying collateral. Specific valuation allowances are established for acquired loans with deterioration in the discounted present value of expected future cash flows since acquisitions or, in the case of collateral dependent impaired loans, for any increase in the excess of a loan's book balance greater than the fair value of its underlying collateral. A specific valuation allowance for losses on TDR loans is determined by comparing the net carrying amount of the troubled debt restructured loan with the restructured loan's cash flows discounted at the original effective rate. Impaired loans are reviewed quarterly with adjustments made to the calculated reserve as necessary. As of December 31, 2015 , Management believes that the methodology for calculating the allowance is sound and that the allowance provides a reasonable basis for determining and reporting on probable losses in the Company’s loan portfolios. The general allowance for loan and lease losses was $53.1 million as of December 31, 2015 , compared to $50.1 million as of December 31, 2014 . The general portion of the allowance for loan and lease losses increased by $3.0 million during the year ended December 31, 2015 , as a result of growth in the commercial real estate and commercial and industrial portfolios partially offset by the decrease in the indirect auto portfolios, which resulted in a release of $1.9 million in the general allowance for loan and lease losses in the first quarter of 2015. The specific allowance for loan and lease losses was $3.6 million as of December 31, 2015 , compared to $1.2 million as of December 31, 2014 . The specific allowance increased by $2.5 million during the year ended December 31, 2015 , primarily due to one commercial relationship which was downgraded during the year ended December 31, 2015 . The changes to the methodology described above resulted in a reallocation of reserve from unallocated to specific loan segments. As such, the reserve for unallocated allowance for loan and lease losses as of December 31, 2015 was reduced to zero , compared to $2.4 million as of December 31, 2014 . Credit Quality Assessment At the time of loan origination, a rating is assigned based on the capacity to pay and general financial strength of the borrower, the value of assets pledged as collateral, and the evaluation of third party support such as a guarantor. The Company continually monitors the quality of the loan portfolio using all available information. The officer responsible for handling each loan is required to initiate changes to risk ratings when changes in facts and circumstances occur that warrant an upgrade or downgrade in a loan rating. Based on this information, loans demonstrating certain payment issues or other weaknesses may be categorized as delinquent, impaired, nonperforming and/or put on nonaccrual status. Additionally, in the course of resolving such loans, the Company may choose to restructure the contractual terms of certain loans to match the borrower's ability to repay the loan based on their current financial condition. If a restructured loan meets certain criteria, it may be categorized as a troubled debt restructuring. The Company reviews numerous credit quality indicators when assessing the risk in its loan portfolio. For all loans, the Company utilizes an eight-grade loan rating system, which assigns a risk rating to each borrower based on a number of quantitative and qualitative factors associated with a loan transaction. Factors considered include industry and market conditions; position within the industry; earnings trends; operating cash flow; asset/liability values; debt capacity; guarantor strength; management and controls; financial reporting; collateral; and other considerations. In addition, the Company's independent loan review group evaluates the credit quality and related risk ratings in all loan portfolios. The results of these reviews are reported to the Risk Committee of the Board of Directors on a periodic basis and annually to the Board of Directors. For the consumer loans, the Company heavily relies on payment status for calibrating credit risk. The ratings categories used for assessing credit risk in the commercial real estate, multi-family mortgage, construction, commercial, equipment financing, condominium association and other consumer loan and lease classes are defined as follows: 1 -4 Rating—Pass Loan rating grades "1" through "4" are classified as "Pass," which indicates borrowers are performing in accordance with the terms of the loan and are less likely to result in loss due to the capacity of the borrower to pay and the adequacy of the value of assets pledged as collateral. 5 Rating—Other Assets Especially Mentioned ("OAEM") Borrowers exhibit potential credit weaknesses or downward trends deserving Management's attention. If not checked or corrected, these trends will weaken the Company's asset and position. While potentially weak, currently these borrowers are marginally acceptable; no loss of principal or interest is envisioned. 6 Rating—Substandard Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt. Substandard loans may be inadequately protected by the current net worth and paying capacity of the obligors or by the collateral pledged, if any. Normal repayment from the borrower is in jeopardy. Although no loss of principal is envisioned, there is a distinct possibility that a partial loss of interest and/or principal will occur if the deficiencies are not corrected. Collateral coverage may be inadequate to cover the principal obligation. 7 Rating—Doubtful Borrowers exhibit well-defined weaknesses that jeopardize the orderly liquidation of debt with the added provision that the weaknesses make collection of the debt in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Serious problems exist to the point where partial loss of principal is likely. 8 Rating—Definite Loss Borrowers deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuation as active assets of the Company is not warranted. Assets rated as "OAEM," "substandard" or "doubtful" based on criteria established under banking regulations are collectively referred to as "criticized" assets. Credit Quality Information The following tables present the recorded investment in loans in each class as of December 31, 2015 by credit quality indicator. At December 31, 2015 Commercial Real Estate Multi- Family Mortgage Construction Commercial Equipment Financing Condominium Association Other Consumer (In Thousands) Originated: Loan rating: Pass $ 1,668,891 $ 619,786 $ 129,534 $ 562,615 $ 709,381 $ 59,875 $ 12,017 OAEM 12,781 788 208 9,976 804 — — Substandard 780 291 — 1,714 1,414 — 22 Doubtful 2,096 — — 2,294 1,389 — — Total originated 1,684,548 620,865 129,742 576,599 712,988 59,875 12,039 Acquired: Loan rating: Pass 182,377 35,785 580 11,959 8,902 — 131 OAEM 1,202 612 — 902 — — — Substandard 7,066 1,218 — 3,071 — — — Doubtful 399 — — — — — — Total acquired 191,044 37,615 580 15,932 8,902 — 131 Total loans $ 1,875,592 $ 658,480 $ 130,322 $ 592,531 $ 721,890 $ 59,875 $ 12,170 As of December 31, 2015 , there were no loans categorized as definite loss. At December 31, 2015 Indirect Automobile ($ In Thousands) Originated: Credit score: Over 700 $ 5,435 39.7 % 661-700 1,965 14.4 % 660 and below 6,217 45.5 % Data not available 61 0.4 % Total loans $ 13,678 100.0 % At December 31, 2015 Residential Mortgage Home Equity ($ In Thousands) ($ In Thousands) Originated: Loan-to-value ratio: Less than 50% $ 118,628 19.2 % $ 131,584 41.8 % 50% - 69% 214,390 34.8 % 51,492 16.4 % 70% - 79% 173,774 28.2 % 32,916 10.5 % 80% and over 17,808 2.9 % 18,082 5.7 % Data not available 3,246 0.5 % 634 0.2 % Total originated 527,846 85.6 % 234,708 74.6 % Acquired: Loan-to-value ratio: Less than 50% 18,857 3.1 % 48,563 15.4 % 50%—69% 32,986 5.3 % 20,623 6.6 % 70%—79% 17,883 2.9 % 7,144 2.3 % 80% and over 14,011 2.3 % 2,650 0.8 % Data not available 4,866 0.8 % 865 0.3 % Total acquired 88,603 14.4 % 79,845 25.4 % Total loans $ 616,449 100.0 % $ 314,553 100.0 % The following tables present the recorded investment in loans in each class as of December 31, 2014 by credit quality indicator. At December 31, 2014 Commercial Real Estate Multi- Family Mortgage Construction Commercial Equipment Financing Condominium Association Other Consumer (In Thousands) Originated: Loan rating: Pass $ 1,402,121 $ 574,972 $ 146,074 $ 447,778 $ 583,340 $ 51,593 $ 11,540 OAEM 22,491 1,242 — 12,193 932 — — Substandard 1,009 — — 1,671 2,338 — 40 Doubtful — — — 1,088 886 — — Total originated 1,425,621 576,214 146,074 462,730 587,496 51,593 11,580 Acquired: Loan rating: Pass 237,439 60,837 1,709 43,925 13,795 — 167 OAEM 8,351 713 230 1,852 — — — Substandard 8,250 1,942 — 5,424 133 — — Doubtful 421 — — 146 — — — Total acquired 254,461 63,492 1,939 51,347 13,928 — 167 Total loans $ 1,680,082 $ 639,706 $ 148,013 $ 514,077 $ 601,424 $ 51,593 $ 11,747 As of December 31, 2014 , there were no loans categorized as definite loss. At December 31, 2014 Indirect Automobile ($ In Thousands) Originated: Credit score: Over 700 $ 262,160 82.7 % 661-700 43,422 13.7 % 660 and below 9,927 3.1 % Data not available 1,478 0.5 % Total loans $ 316,987 100.0 % At December 31, 2014 Residential Mortgage Home Equity ($ In Thousands) ($ In Thousands) Originated: Loan-to-value ratio: Less than 50% $ 105,342 18.4 % $ 113,541 39.5 % 50%—69% 179,319 31.4 % 35,660 12.4 % 70%—79% 166,467 29.1 % 27,123 9.4 % 80% and over 19,335 3.4 % 4,195 1.5 % Data not available 1,615 0.3 % 1,061 0.4 % Total originated 472,078 82.6 % 181,580 63.2 % Acquired: Loan-to-value ratio: Less than 50% 19,574 3.4 % 70,293 24.5 % 50%—69% 35,131 6.2 % 22,581 7.9 % 70%—79% 22,972 4.0 % 10,569 3.7 % 80% and over 16,268 2.8 % 1,178 0.4 % Data not available 5,897 1.0 % 857 0.3 % Total acquired 99,842 17.4 % 105,478 36.8 % Total loans $ 571,920 100.0 % $ 287,058 100.0 % The following table presents information regarding foreclosed residential real estate property at the dates indicated: At December 31, 2015 At December 31, 2014 (In Thousands) Foreclosed residential real estate property held by the creditor $ 362 $ 410 Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure 298 — Age Analysis of Past Due Loans and Leases The following tables present an age analysis of the recorded investment in total loans and leases as of December 31, 2015 and 2014 . At December 31, 2015 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Originated: Commercial real estate loans: Commercial real estate $ 1,782 $ — $ 2,097 $ 3,879 $ 1,680,669 $ 1,684,548 $ — $ 2,876 Multi-family mortgage — — 16 16 620,849 620,865 16 291 Construction 652 — — 652 129,090 129,742 — — Total commercial real estate loans 2,434 — 2,113 4,547 2,430,608 2,435,155 16 3,167 Commercial loans and leases: Commercial 4,578 1,007 2,368 7,953 568,646 576,599 24 3,586 Equipment financing 1,681 595 2,143 4,419 708,569 712,988 77 2,610 Condominium association 205 124 — 329 59,546 59,875 — — Total commercial loans and leases 6,464 1,726 4,511 12,701 1,336,761 1,349,462 101 6,196 Indirect automobile 1,058 335 106 1,499 12,179 13,678 — 675 Consumer loans: Residential mortgage 1,384 — 229 1,613 526,233 527,846 — 1,873 Home equity 390 237 9 636 234,072 234,708 — 319 Other consumer 19 2 25 46 11,993 12,039 — 29 Total consumer loans 1,793 239 263 2,295 772,298 774,593 — 2,221 Total originated loans and leases $ 11,749 $ 2,300 $ 6,993 $ 21,042 $ 4,551,846 $ 4,572,888 $ 117 $ 12,259 At December 31, 2015 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Acquired: Commercial real estate loans: Commercial real estate $ 1,336 $ 369 $ 7,588 $ 9,293 $ 181,751 $ 191,044 $ 4,982 $ 2,606 Multi-family mortgage — — 1,077 1,077 36,538 37,615 1,077 — Construction — — — — 580 580 — — Total commercial real estate loans 1,336 369 8,665 10,370 218,869 229,239 6,059 2,606 Commercial loans and leases: Commercial 351 23 2,967 3,341 12,591 15,932 325 2,678 Equipment financing — — — — 8,902 8,902 — — Total commercial loans and leases 351 23 2,967 3,341 21,493 24,834 325 2,678 Consumer loans: Residential mortgage 326 216 2,399 2,941 85,662 88,603 2,047 352 Home equity 1,012 386 460 1,858 77,987 79,845 142 1,438 Other consumer — — — — 131 131 — — Total consumer loans 1,338 602 2,859 4,799 163,780 168,579 2,189 1,790 Total acquired loans and leases $ 3,025 $ 994 $ 14,491 $ 18,510 $ 404,142 $ 422,652 $ 8,573 $ 7,074 Total loans and leases $ 14,774 $ 3,294 $ 21,484 $ 39,552 $ 4,955,988 $ 4,995,540 $ 8,690 $ 19,333 At December 31, 2014 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Originated: Commercial real estate loans: Commercial real estate $ 1,631 $ 416 $ 160 $ 2,207 $ 1,423,414 $ 1,425,621 $ — $ 1,009 Multi-family mortgage 385 — — 385 575,829 576,214 — — Construction — — — — 146,074 146,074 — — Total commercial real estate loans 2,016 416 160 2,592 2,145,317 2,147,909 — 1,009 Commercial loans and leases: Commercial 758 876 1,499 3,133 459,597 462,730 2 2,722 Equipment financing 1,534 138 2,392 4,064 583,432 587,496 — 3,214 Condominium association 501 — — 501 51,092 51,593 — — Total commercial loans and leases 2,793 1,014 3,891 7,698 1,094,121 1,101,819 2 5,936 Indirect automobile 4,635 923 166 5,724 311,263 316,987 — 645 Consumer loans: Residential mortgage — — 501 501 471,577 472,078 — 1,340 Home equity 75 52 129 256 181,324 181,580 — 161 Other consumer 17 5 30 52 11,528 11,580 — 41 Total consumer loans 92 57 660 809 664,429 665,238 — 1,542 Total originated loans and leases $ 9,536 $ 2,410 $ 4,877 $ 16,823 $ 4,215,130 $ 4,231,953 $ 2 $ 9,132 At December 31, 2014 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Acquired: Commercial real estate loans: Commercial real estate $ 989 $ 3,705 $ 2,387 $ 7,081 $ 247,380 $ 254,461 $ 2,387 $ — Multi-family mortgage 195 729 363 1,287 62,205 63,492 363 — Construction — — — — 1,939 1,939 — — Total commercial real estate loans 1,184 4,434 2,750 8,368 311,524 319,892 2,750 — Commercial loans and leases: Commercial 712 488 3,033 4,233 47,114 51,347 624 2,474 Equipment financing 2 52 66 120 13,808 13,928 73 9 Total commercial loans and leases 714 540 3,099 4,353 60,922 65,275 697 2,483 Consumer loans: Residential mortgage — — 2,715 2,715 97,127 99,842 2,372 342 Home equity 1,005 733 923 2,661 102,817 105,478 187 1,757 Other consumer — — — — 167 167 — — Total consumer loans 1,005 733 3,638 5,376 200,111 205,487 2,559 2,099 Total acquired loans and leases $ 2,903 $ 5,707 $ 9,487 $ 18,097 $ 572,557 $ 590,654 $ 6,006 $ 4,582 Total loans and leases $ 12,439 $ 8,117 $ 14,364 $ 34,920 $ 4,787,687 $ 4,822,607 $ 6,008 $ 13,714 Commercial Real Estate Loans —As of December 31, 2015 , loans outstanding in the three classes within this segment expressed as a percentage of total loans and leases outstanding were as follows: commercial real estate loans -- 37.5% ; multi-family mortgage loans -- 13.2% ; and construction loans -- 2.6% . Loans in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual loan basis for impairment. For non-impaired commercial real estate loans, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio. The factors applied are based primarily on historic loan loss experience and an assessment of internal and external factors and other relevant information. Commercial Loans and Leases —As of December 31, 2015 , loans and leases outstanding in the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: commercial loans and leases -- 11.9% ; equipment financing loans -- 14.5% ; and loans to condominium associations -- 1.2% . Loans and leases in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual basis for impairment. For non-impaired commercial loans and leases, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio. Consumer Loans —As of December 31, 2015 , loans outstanding within the four classes within this segment expressed as a percent of total loans and leases outstanding were as follows: residential mortgage loans -- 12.3% , home equity loans -- 6.3% , indirect automobile loans -- 0.3% , and other consumer loans -- 0.2% . Significant risk characteristics related to the residential mortgage and home equity loan portfolios are the geographic concentration of the properties financed within selected communities in the greater Boston and Providence metropolitan areas. The payment status and loan-to-value ratio are the primary credit quality indicator used for residential mortgage loans and home equity loans. Generally, loans are not made when the loan-to-value ratio exceeds 80% unless private mortgage insurance is obtained and/or there is a financially strong guarantor. Consumer loans that become 90 days or more past due, or are placed on nonaccrual regardless of past due status, are reviewed on an individual basis for impairment by assessing the net realizable value of underlying collateral and the economic condition of the borrower. Determination of the allowance for loan and lease losses for indirect automobile loans is based primarily on payment status and historical loss rates. Impaired Loans and Leases A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. The Company has defined the population of impaired loans to include nonaccrual loans and troubled debt restructured loans. When the ultimate collectability of the total principal of an impaired loan or lease is in doubt and the loan is on nonaccrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan or lease is not in doubt and the loan or lease is on nonaccrual status, contractual interest is credited to interest income when received, under the cash basis method. The following tables include the recorded investment and unpaid principal balances of impaired loans and leases with the related allowance amount, if applicable, for the originated and acquired loan and lease portfolios at the dates indicated. Also presented are the average recorded investments in the impaired loans and leases and the related amount of interest recognized during the period that the impaired loans were impaired. At December 31, 2015 At December 31, 2014 Recorded (1) Unpaid Related Recorded Investment (2) Unpaid Related (In Thousands) Originated: With no related allowance recorded: Commercial real estate $ 2,758 $ 2,756 $ — $ 2,751 $ 2,748 $ — Commercial 14,097 14,074 — 13,440 13,421 — Consumer 4,582 4,575 — 3,055 3,048 — Total originated with no related allowance recorded 21,437 21,405 — 19,246 19,217 — With an allowance recorded: Commercial real estate 6,150 6,150 2,167 4,119 4,119 108 Commercial 2,215 2,213 1,202 2,019 2,011 768 Consumer — — — 176 176 10 Total originated with an allowance recorded 8,365 8,363 3,369 6,314 6,306 886 Total originated impaired loans and leases 29,802 29,768 3,369 25,560 25,523 886 Acquired: With no related allowance recorded: Commercial real estate 7,035 7,035 — 9,413 9,428 — Commercial 4,053 4,052 — 6,049 6,047 — Consumer 7,549 7,565 — 6,688 6,688 — Total acquired with no related allowance recorded 18,637 18,652 — 22,150 22,163 — With an allowance recorded: Commercial real estate 2,606 2,606 148 244 244 22 Commercial 486 486 112 478 478 214 Consumer 174 174 9 225 225 41 Total acquired with an allowance recorded 3,266 3,266 269 947 947 277 Total acquired impaired loans and leases 21,903 21,918 269 23,097 23,110 277 Total impaired loans and leases $ 51,705 $ 51,686 $ 3,638 $ 48,657 $ 48,633 $ 1,163 (1) Includes originated and acquired nonaccrual loans of $9.3 million and $7.1 million , respectively as of December 31, 2015 . (2) Includes originated and acquired nonaccrual loans of $7.1 million and $4.6 million , respectively as of December 31, 2014 . Year Ended December 31, 2015 December 31, 2014 December 31, 2013 Average Interest Average Interest Average Interest (In Thousands) Originated: With no related allowance recorded: Commercial real estate $ 3,999 $ 86 $ 2,786 $ 102 $ 2,184 $ 92 Commercial 15,143 641 11,840 343 4,257 144 Consumer 4,267 65 3,166 42 1,077 30 Total originated with no related allowance recorded 23,409 792 17,792 487 7,518 266 With an allowance recorded: Commercial real estate 5,132 197 3,223 69 1,464 43 Commercial 5,650 10 2,285 51 1,781 29 Consumer 84 — 458 15 3,210 97 Total originated with an allowance recorded 10,866 207 5,966 135 6,455 169 Total originated impaired loans and leases 34,275 999 23,758 622 13,973 435 Acquired: With no related allowance recorded: Commercial real estate 9,200 125 10,884 350 9,639 251 Commercial 4,428 65 6,875 122 5,205 129 Consumer 7,837 62 6,701 28 1,333 20 Total acquired with no related allowance recorded 21,465 252 24,460 500 16,177 400 With an allowance recorded: Commercial real estate 713 — 942 76 2,765 42 Commercial 638 — 631 15 577 5 Consumer 249 8 281 3 — — Total acquired with an allowance recorded 1,600 8 1,854 94 3,342 47 Total acquired impaired loans and leases 23,065 260 26,314 594 19,519 447 Total impaired loans and leases $ 57,340 $ 1,259 $ 50,072 $ 1,216 $ 33,492 $ 882 The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated: At December 31, 2015 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Allowance for Loan and Lease Losses: Originated: Individually evaluated for impairment $ 2,167 $ 1,202 $ — $ — $ — $ 3,369 Collectively evaluated for impairment 26,857 20,545 269 3,947 — 51,618 Total originated loans and leases 29,024 21,747 269 3,947 — 54,987 Acquired: Individually evaluated for impairment 148 112 — 9 — 269 Collectively evaluated for impairment 333 71 — 45 — 449 Acquired with deteriorated credit quality 646 88 — 300 — 1,034 Total acquired loans and leases 1,127 271 — 354 — 1,752 Total allowance for loan and lease losses $ 30,151 $ 22,018 $ 269 $ 4,301 $ — $ 56,739 Loans and Leases: Originated: Individually evaluated for impairment $ 8,907 $ 15,806 $ — $ 4,471 $ — $ 29,184 Collectively evaluated for impairment 2,426,248 1,333,656 13,678 770,122 — 4,543,704 Total originated loans and leases 2,435,155 1,349,462 13,678 774,593 — 4,572,888 Acquired: Individually evaluated for impairment 3,188 4,090 — 2,606 — 9,884 Collectively evaluated for impairment 63,857 12,081 — 105,146 — 181,084 Acquired with deteriorated credit quality 162,194 8,663 — 60,827 — 231,684 Total acquired loans and leases 229,239 24,834 — 168,579 — 422,652 Total loans and leases $ 2,664,394 $ 1,374,296 $ 13,67

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment Premises and equipment consist of the following: At December 31, Estimated Useful Life 2015 2014 (In Thousands) (In Years) Land $ 7,562 $ 7,562 NA Office building and improvements 81,466 78,461 10 to 40 Furniture, fixtures and equipment 13,019 12,224 5 to 25 Vehicles 221 144 3 to 5 Computer Equipment 8,677 8,400 3 Core processing system and software 18,933 18,496 3 to 7.5 Total 129,878 125,287 Accumulated depreciation and amortization 51,722 44,668 Total premises and equipment $ 78,156 $ 80,619 Depreciation and amortization expense is calculated using the straight-line method and is included in occupancy and equipment and data processing expense in the Consolidated Statements of Income. For the years ended December 31, 2015 , 2014 and 2013 , depreciation and amortization expense related to premises and equipment totaled $7.2 million , $7.0 million , and $6.3 million , respectively. In January 2014, the Company completed a transaction to sell a facility located in Brookline, MA, for $2.2 million . The carrying value of the property, including land, building, and furniture, fixtures, and equipment, was $0.4 million . After costs to sell of $0.2 million , the Company recorded a gain on sale in the amount of $1.6 million during the year ended December 31, 2014 , which is included in gain on sale/disposals of premises and equipment, net in the Company’s consolidated statements of income. There were no sales of premises and equipment during the years ended December 31, 2015 and 2013 .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The changes in the carrying value of goodwill for the periods indicated were as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Balance at beginning of year $ 137,890 $ 137,890 $ 137,890 Additions — — — Adjustments to original goodwill — — — Balance at end of year $ 137,890 $ 137,890 $ 137,890 The following is a summary of the Company's other intangible assets: At December 31, 2015 At December 31, 2014 Gross Accumulated Carrying Gross Accumulated Carrying (In Thousands) Other intangible assets: Core deposits $ 36,172 $ 26,628 $ 9,544 $ 36,172 $ 23,717 $ 12,455 Trade name 1,600 511 1,089 1,600 511 1,089 Trust relationship 1,568 1,568 — 1,568 1,568 — Other intangible 442 442 — 442 442 — Total other intangible assets $ 39,782 $ 29,149 $ 10,633 $ 39,782 $ 26,238 $ 13,544 At December 31, 2013, the Company concluded that the BankRI name would continue to be utilized in its marketing strategies; therefore, the trade name with carrying value of $1.1 million , has an indefinite life and ceased to amortize. The weighted-average amortization period for core deposit intangible and trust relationships is 11.0 and 1.0 years, respectively. There were no impairment losses relating to other acquisition-related intangible assets recorded during the years ended December 31, 2015 , 2014 and 2013 . The estimated aggregate future amortization expense for other intangible assets for each of the next five years and thereafter is as follows: Year ended December 31: Amount (In Thousands) 2016 $ 2,500 2017 2,089 2018 1,669 2019 1,295 2020 944 Thereafter 1,047 Total $ 9,544

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets	Other Assets BOLI BOLI is recorded at the cash surrender value of the policies, less any applicable cash surrender charges, and is recorded in other assets. As of December 31, 2015 and 2014 , BankRI owned seven policies with a net cash surrender value of $36.8 million and $35.8 million , respectively. As of December 31, 2015 and 2014 , First Ipswich owned two policies with a net cash surrender value of $0.8 million and $0.7 million , respectively. The Company recorded a total of $1.0 million , $1.1 million , and $1.1 million of tax exempt income from these nine policies in 2015 , 2014 , and 2013 , respectively. They are included in the Company’s other non-interest income in the consolidated statements of income. Affordable Housing Investments The Company began investing in affordable housing projects that benefit low- and moderate-income individuals in 2009. As of December 31, 2015 , the Company had investments in ten of these projects. The project sponsor or general partner controls the project's management. In each case, the Company is a limited partner with less than 50% of the outstanding equity interest in any single project. On January 1, 2015, the Company adopted ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects , which required retrospective application. Prior to the adoption of ASU 2014-01, the Company’s investments in qualified affordable housing projects were accounted for using the equity method. Under the equity method, operating losses or gains from these investments were included as a component of non-interest income in the Company's consolidated statements of income. ASU 2014-01 calls for the use of the proportional amortization method calculation and the operating losses or gains for these investments are included as a component of the provision for income taxes in the Company’s consolidated statements of income. Under the proportional amortization method, the initial costs of the investment in qualified affordable housing projects is amortized based on the tax credits and other benefits received. Further information regarding the Company's investments in affordable housing projects follows: At December 31, 2015 2014 2013 (In Thousands) Investments in affordable housing projects included in other assets $ 11,604 $ 10,131 $ 10,301 Unfunded commitments related to affordable housing projects included in other liabilities 3,163 2,608 2,904 Investment in affordable housing tax credits included in other liabilities 1,588 1,432 1,105 Investment in affordable housing tax benefits included in other liabilities 656 669 553 For the year ended December 31, 2015 (In Thousands) Investment amortization included in provision for income taxes $ 1,654 Amount recognized as income tax benefit 656 ASU 2014-01 was applied retrospectively to all periods presented. The cumulative effect on retained earnings was $1.1 million at January 1, 2015. The following table illustrates the prior period adjustments related to the adoption of ASU 2014-01. At December 31, 2014 (In Thousands) Other assets, as reported $ 79,411 Prior period adjustment 1,068 Other assets, as adjusted $ 80,479 Retained earnings, as reported $ 83,792 Prior period adjustment 1,068 Retained earnings, as adjusted $ 84,860 For the year ended December 31, 2014 2013 (In Thousands) Loss from investments in affordable housing projects, as reported $ (2,060 ) $ (1,812 ) Prior period adjustment 2,060 1,812 Loss from investments in affordable housing projects, as adjusted $ — $ — Provision for income taxes, as reported $ 24,749 $ 19,481 Prior period adjustment 1,537 1,183 Provision for income taxes, as adjusted $ 26,286 $ 20,664 Net income, as reported $ 42,765 $ 35,386 Prior period adjustment 523 629 Net income, as adjusted $ 43,288 $ 36,015 Basic earnings per share, as reported $ 0.61 $ 0.51 Prior period adjustment 0.01 0.01 Basic earnings per share, as adjusted $ 0.62 $ 0.52 Effective tax rate, as reported 35.5 % 34.4 % Prior period adjustment 1.2 % 0.9 % Effective tax rate, as adjusted 36.7 % 35.3 %

Deposits

Deposits	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposits	Deposits A summary of deposits follows: December 31, 2015 December 31, 2014 Amount Weighted Average Rate Amount Weighted Average Rate (Dollars in Thousands) Demand checking accounts $ 799,117 — $ 726,118 — NOW accounts 283,972 0.07 % 235,063 0.07 % Savings accounts 540,788 0.25 % 531,727 0.21 % Money market accounts 1,594,269 0.44 % 1,518,490 0.52 % Total core deposit accounts 3,218,146 0.26 % 3,011,398 0.31 % Certificate of deposit accounts maturing: Within six months 320,975 0.65 % 363,258 0.70 % After six months but within 1 year 395,516 0.83 % 258,379 0.72 % After 1 year but within 2 years 226,513 1.02 % 232,658 1.08 % After 2 years but within 3 years 60,730 1.42 % 36,685 1.49 % After 3 years but within 4 years 30,002 1.78 % 24,059 1.32 % After 4 years but within 5 years 53,717 1.88 % 31,630 1.75 % 5+ Years 419 1.82 % 39 1.34 % Total certificate of deposit accounts 1,087,872 0.93 % 946,708 0.88 % Total deposits $ 4,306,018 0.43 % $ 3,958,106 0.44 % Certificate of deposit accounts issued in amounts of $250,000 or more totaled $168.4 million and $222.2 million as of December 31, 2015 and 2014 , respectively. Interest expense on deposit balances is summarized as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Interest-bearing deposits: NOW accounts $ 179 $ 171 $ 173 Savings accounts 1,094 1,197 1,288 Money market accounts 6,935 7,846 8,220 Certificate of deposit accounts 9,272 7,846 9,092 Total interest-bearing deposits $ 17,480 $ 17,060 $ 18,773 Related Party Deposits Deposit accounts of directors, executive officers and their affiliates totaled $40.5 million and $16.1 million as of December 31, 2015 and 2014 , respectively. Collateral Pledged to Deposits As of December 31, 2015 and 2014 , $170.4 million and $93.0 million , respectively, of collateral was pledged for municipal deposits and TT&L (Treasury Tax and Loan Deposits).

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds Borrowed funds are comprised of the following: At December 31, 2015 2014 (In Thousands) Advances from the FHLBB $ 861,866 $ 1,004,026 Subordinated debentures and notes 82,936 82,763 Other borrowed funds 38,227 39,615 Total borrowed funds $ 983,029 $ 1,126,404 Interest expense on borrowed funds for the periods indicated is as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Advances from the FHLBB $ 9,950 $ 10,535 $ 10,886 Subordinated debentures and notes 5,001 1,740 439 Other borrowed funds 114 79 68 Total interest expense on borrowed funds $ 15,065 $ 12,354 $ 11,393 Investment Securities and Loans Pledged as Collateral As of December 31, 2015 and 2014 , $2.3 billion and $2.1 billion , respectively, of investment securities and loans and leases, were pledged as collateral for repurchase agreements, swap agreements, FHLBB borrowings, and municipal deposits and TT&L (Treasury Tax and Loan Deposits). The Banks did not have any outstanding FRB borrowings as of December 31, 2015 and 2014 . FHLBB Advances FHLBB advances mature as follows: At December 31, 2015 2014 Amount Callable Amount Weighted Average Rate Amount Callable Amount Weighted Average Rate (Dollars in Thousands) Within 1 year $ 575,749 $ 30,599 0.70 % $ 583,000 $ — 0.52 % Over 1 year to 2 years 228,422 114,922 1.89 % 217,054 31,353 0.89 % Over 2 years to 3 years 36,476 10,038 2.46 % 145,326 116,828 2.43 % Over 3 years to 4 years 5,342 — 2.17 % 36,550 10,054 2.46 % Over 4 years to 5 years 91 — 2.04 % 5,416 — 2.21 % Over 5 years 15,786 — 4.21 % 16,680 — 4.18 % $ 861,866 $ 155,559 1.16 % $ 1,004,026 $ 158,235 1.02 % Actual maturities of the advances may differ from those presented above since the FHLBB has the right to call certain advances prior to the scheduled maturity. The FHLBB advances are secured by blanket pledge agreements which require the Banks to maintain certain qualifying assets as collateral. The Banks did not have any FRB borrowings as of December 31, 2015 . Total available borrowing capacity for advances from the FHLBB and FRB was $1.4 billion as of December 31, 2015 for the Banks. The total amount of qualifying collateral for FHLBB and FRB borrowings was $2.1 billion as of December 31, 2015 . Repurchase Agreements Information concerning repurchase agreements is as follows for the periods indicated below: Year Ended December 31, 2015 2014 (Dollars In Thousands) Outstanding at end of year $ 38,227 $ 39,633 Average outstanding for the year 34,468 28,724 Maximum outstanding at any month-end 38,231 39,633 Weighted average rate at end of year 0.19 % 0.16 % Weighted average rate paid for the year 0.33 % 0.28 % Securities sold under agreements to repurchase are funds borrowed from customers on an overnight basis that are secured by GSEs in the same amount. The obligations to repurchase the identical securities that were sold are reflected as liabilities and the securities remain in the asset accounts. Subordinated Debentures and Notes On September 15, 2014, the Company issued $75.0 million of 6.0% fixed-to-floating subordinated notes due September 15, 2029. The Company is obligated to pay 6.0% interest semiannually between September 2014 and September 2024. Subsequently, the Company is obligated to pay 3-month LIBOR plus 3.315% quarterly until the notes mature in September 2029. The following table summarizes the Company's subordinated debentures and notes at the dates indicated. Carrying Amount Issue Date Rate Maturity Date Next Call Date December 31, 2015 December 31, 2014 (Dollars in Thousands) June 26, 2003 Variable; 3-month LIBOR + 3.10% June 26, 2033 March 28, 2016 $ 4,725 $ 4,696 March 17, 2004 Variable; 3-month LIBOR + 2.79% March 17, 2034 March 17, 2016 $ 4,589 $ 4,543 September 15, 2014 6.0% Fixed-to-Variable; 3-month LIBOR + 3.315% September 15, 2029 September 15, 2024 $ 73,624 $ 73,524 The above carrying amounts of the acquired subordinated debentures included $0.7 million of accretion adjustments and $1.4 million of capitalized debt issuance costs as of December 31, 2015 . This compares to $0.8 million of accretion adjustments and $1.5 million of capitalized debt issuance costs as of December 31, 2014 .

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Off-Balance Sheet Financial Instruments The Company is party to off-balance sheet financial instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include loan commitments, standby and commercial letters of credits, and interest rate swaps. According to GAAP, these financial instruments are not recorded in the financial statements until they are funded or related fees are incurred or received. The contract amounts reflect the extent of the involvement the Company has in particular classes of these instruments. Such commitments involve, to varying degrees, elements of credit risk and interest-rate risk in excess of the amount recognized in the consolidated balance sheets. The Company's exposure to credit loss in the event of non-performance by the counterparty is represented by the fair value of the instruments. The Company uses the same policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Financial instruments with off-balance-sheet risk at the dates indicated follow: At December 31, 2015 2014 (In Thousands) Financial instruments whose contract amounts represent credit risk: Commitments to originate loans and leases: Commercial real estate $ 36,000 $ 107,179 Commercial 78,017 102,353 Residential mortgage 19,430 20,520 Unadvanced portion of loans and leases 648,291 629,351 Unused lines of credit: Home equity 280,786 244,603 Other consumer 12,383 10,876 Other commercial 529 728 Unused letters of credit: Financial standby letters of credit 12,389 16,762 Performance standby letters of credit 392 3,126 Commercial and similar letters of credit 821 50 Back-to-back interest rate swaps 490,632 109,362 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee by the customer. Since some of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if any, is based on Management's credit evaluation of the borrower. Standby and commercial letters of credits are conditional commitments issued by the Company to guarantee performance of a customer to a third party. These standby and commercial letters of credit are primarily issued to support the financing needs of the Company's commercial customers. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. The liability for unfunded credit commitments, which is included in other liabilities, was $1.3 million as of December 31, 2015 and December 31, 2014 , respectively. From time to time the Company enters into back-to-back interest rate swaps with commercial customers and third-party financial institutions. These swaps allow the Company to offer long-term fixed-rate commercial loans while mitigating the interest-rate risk of holding those loans. In a back-to-back interest rate swap transaction, the Company lends to a commercial customer on a floating-rate basis and then enters into an interest rate swap with that customer. Concurrently, the Company enters into offsetting swaps with a third-party financial institution, effectively minimizing its net interest-rate risk exposure resulting from such transactions. The fair value of interest rate swap assets and liabilities was $8.7 million and $8.8 million , respectively, as of December 31, 2015 . The fair value of interest rate swap assets and liabilities was $2.7 million and $2.7 million , respectively, as of December 31, 2014 . Lease Commitments The Company leases certain office space under various noncancellable operating leases. These leases have original terms ranging from 5 years to over 25 years. Certain leases contain renewal options and escalation clauses which can increase rental expenses based principally on the consumer price index and fair market rental value provisions. A summary of future minimum rental payments under such leases at the dates indicated follows: Year ended December 31, Minimum Rental Payments (In Thousands) 2016 $ 4,933 2017 4,472 2018 4,071 2019 3,220 2020 2,664 Thereafter 13,521 Total $ 32,881 Certain leases contain escalation clauses for real estate taxes and other expenditures, which are not included above. Total rental expense was $5.5 million in 2015 , which included $0.2 million in lease acceleration related to the sale of $255.2 million of the indirect automobile loan portfolio in March 2015. This compares to total rent expense of $6.5 million in 2014 , which included $0.8 million in lease acceleration related to a relocation of an operations center and the closure of a branch property. In 2013 , total rent expense was $5.2 million . A portion of the Company's headquarters was rented to third-party tenants which generated rental income of $0.4 million in 2015 and 2014 , respectively. Rental income was reported in non-interest income in the Company's consolidated statements of income. Legal Proceedings In the normal course of business, there are various outstanding legal proceedings. In the opinion of Management, after consulting with legal counsel, the consolidated financial position and results of operations of the Company are not expected to be affected materially by the outcome of such proceedings.

Earnings per Share (EPS)

Earnings per Share (EPS)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share (EPS)	Earnings per Share ("EPS") The following table is a reconciliation of basic EPS and diluted EPS: For the year ended December 31, 2015 2014 2013 Basic Fully Diluted Basic Fully Diluted Basic Fully Diluted (Dollars in Thousands, Except Per Share Amounts) Numerator: Net income* $ 49,782 $ 49,782 $ 43,288 $ 43,288 $ 36,015 $ 36,015 Denominator: Weighted average shares outstanding 70,098,561 70,098,561 69,945,028 69,945,028 69,808,164 69,808,164 Effect of dilutive securities — 137,307 — 109,787 — 75,760 Adjusted weighted average shares outstanding 70,098,561 70,235,868 69,945,028 70,054,815 69,808,164 69,883,924 EPS * $ 0.71 $ 0.71 $ 0.62 $ 0.62 $ 0.52 $ 0.52 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Comprehensive Income_(Loss)

Comprehensive Income/(Loss)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Comprehensive Income/(Loss)	Comprehensive Income/(Loss) Comprehensive income (loss) represents the sum of net income (loss) and other comprehensive income (loss). For the years ended December 31, 2015 , 2014 and 2013 , the Company’s other comprehensive income (loss) include the following two components: (i) unrealized holding gains (losses) on investment securities available-for-sale; and (ii) adjustment of accumulated obligation for postretirement benefits. Changes in accumulated other comprehensive (loss) income by component, net of tax, were as follows for the periods indicated: Year Ended December 31, 2015 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive (Loss)/Income (In Thousands) Balance at December 31, 2014 $ (1,733 ) $ 111 $ (1,622 ) Other comprehensive (loss) income (1,094 ) 240 (854 ) Balance at December 31, 2015 $ (2,827 ) $ 351 $ (2,476 ) Year Ended December 31, 2014 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive Income/(Loss) (In Thousands) Balance at December 31, 2013 $ (8,332 ) $ 417 $ (7,915 ) Other comprehensive income (loss) 6,599 (306 ) 6,293 Balance at December 31, 2014 $ (1,733 ) $ 111 $ (1,622 ) Year Ended December 31, 2013 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive Income (In Thousands) Balance at December 31, 2012 $ 3,358 $ 125 $ 3,483 Other comprehensive (loss) income (11,690 ) 292 (11,398 ) Balance at December 31, 2013 $ (8,332 ) $ 417 $ (7,915 ) The following is a summary of the amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015 , 2014 , and 2013 . Year Ended December 31, Income Statement Line Affected by Reclassification 2015 2014 2013 (In Thousands) Other Comprehensive Income (Loss) Component Unrealized gains on investment securities available-for-sale: $ — $ 65 $ 397 Gain on sales of securities,net — (23 ) (142 ) Provision for income taxes Total reclassifications for the period $ — $ 42 $ 255 Net income

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company may use interest-rate contracts (swaps, caps and floors) as part of interest-rate risk management strategy. Interest-rate swap, cap and floor agreements are entered into as hedges against future interest-rate fluctuations on specifically identified assets or liabilities. The Company did not have derivative fair value hedges or derivative cash flow hedges as of December 31, 2015 and 2014 . Derivatives not designated as hedges are not speculative but rather, result from a service the Company provides to certain customers for a fee. The Company executes interest-rate swaps with commercial banking customers to aid them in managing their interest-rate risk. The interest-rate swap contracts allow the commercial banking customers to convert floating-rate loan payments to fixed-rate loan payments. The Company concurrently enters into offsetting swaps with a third-party financial institution, effectively minimizing its net risk exposure resulting from such transactions. The third-party financial institution exchanges the customer's fixed-rate loan payments for floating-rate loan payments. As the interest-rate swaps associated with this program do not meet hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. The Company had 64 interest-rate swaps with an aggregate notional amount of $490.6 million and 22 interest-rate swaps with an aggregate notional amount of $109.4 million related to this program as of December 31, 2015 and 2014 , respectively. Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments as of December 31, 2015 and 2014 . At December 31, 2015 At December 31, 2014 Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives (In Thousands) Total derivatives (interest-rate products) not designated as hedging instruments $ 8,656 $ 8,781 $ 2,676 $ 2,714 Changes in the fair value are recognized directly in the Company's unaudited consolidated statements of income and are included in other non-interest income in the consolidated statements of income. The table below presents the gain (loss) recognized in income due to changes in the fair value for the year ended December 31, 2015 and 2014 . Year Ended December 31, 2015 2014 (In Thousands) Gain (loss) recognized in income on derivatives $ 86 $ (8 ) By using derivative financial instruments, the Company exposes itself to credit risk which is the risk of failure by the counterparty to perform under the terms of the derivative contract. When the fair value of a derivative contract is positive, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative is negative, the Company owes the counterparty and, therefore, it does not possess credit risk. The credit risk in derivative instruments is mitigated by entering into transactions with highly-rated counterparties that Management believes to be creditworthy and by limiting the amount of exposure to each counterparty by either cross collateralizing the underlying hedged loan or through bilateral posting of collateral to cover exposure. As the swaps are subject to master netting agreements, the Company had limited exposure relating to interest rate swaps with institutional counterparties as of December 31, 2015 and 2014 . The estimated net credit risk exposure for derivative financial instruments was $125.0 thousand and $38.0 thousand as of December 31, 2015 , and 2014 , respectively. Certain derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. The Company posted collateral of $14.7 million and $5.4 million in the normal course of business as of December 31, 2015 and 2014 , respectively. The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the consolidated balance sheet at the dates indicated. At December 31, 2015 Gross Gross Amounts Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Net Amount Financial Instruments Pledged Cash Collateral Pledged (In Thousands) Asset Derivatives $ 8,656 $ — $ 8,656 $ — $ — $ 8,656 Liability Derivatives $ 8,781 $ — $ 8,781 $ 9,873 $ 4,790 $ — At December 31, 2014 Gross Gross Amounts Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Net Amount Financial Instruments Pledged Cash Collateral Pledged (In Thousands) Asset Derivatives $ 2,676 $ — $ 2,676 $ — $ — $ 2,676 Liability Derivatives $ 2,714 $ — $ 2,714 $ 4,173 $ 1,180 $ — The Company has agreements with certain of its derivative counterparties that contain credit-risk-related contingent provisions. These provisions provide the counterparty with the right to terminate its derivative positions and require the Company to settle its obligations under the agreements if the Company defaults on certain of its indebtedness or if the Company fails to maintain its status as a well-capitalized institution.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense is comprised of the following amounts: Year Ended December 31, 2015 2014 2013 (In Thousands) Current provision: Federal * $ 23,340 $ 20,862 $ 13,968 State * 4,774 5,299 4,298 Total current provision 28,114 26,161 18,266 Deferred provision (benefit): Federal * 679 244 2,537 State * 560 (119 ) (139 ) Total deferred provision 1,239 125 2,398 Total provision for income taxes $ 29,353 $ 26,286 $ 20,664 Total provision for income taxes differed from the amounts computed by applying the statutory U.S. federal income tax rate 35.0% to income before tax expense as a result of the following: Year Ended December 31, 2015 2014 2013 (In Thousands) Expected income tax expense at statutory federal tax rate * $ 28,603 $ 25,049 $ 20,492 State taxes, net of federal income tax benefit * 3,467 3,377 2,713 Bank-owned life insurance (367 ) (369 ) (383 ) Tax-exempt interest income (622 ) (341 ) (310 ) Income attributable to noncontrolling interest in subsidiary (994 ) (831 ) (768 ) Tax credit—premises and equipment — — (453 ) Tax credits from investments in affordable housing projects * (526 ) (667 ) (537 ) Other, net * (208 ) 68 (90 ) Total provision for income taxes * $ 29,353 $ 26,286 $ 20,664 Effective income tax rate * 35.9 % 36.7 % 35.3 % (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. The Company's effective tax rate was 35.9% as of December 31, 2015 compared to 36.7% as of December 31, 2014 . The decrease in the Company's effective tax rate from 2014 was primarily driven by investments in municipal bonds and the formation of a new security corporation in Massachusetts. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities at the dates indicated are as follows: At December 31, 2015 2014 (In Thousands) Deferred tax assets: Allowance for credit losses $ 22,741 $ 21,770 Acquisition fair value adjustments 606 3,066 Unrealized loss on investment securities available-for-sale 1,577 1,086 Retirement and postretirement benefits 4,677 4,794 Deferred compensation 4,966 3,686 Net operating loss and contribution carryovers 1,335 1,614 Nonaccrual interest 352 814 Restricted stock and stock option plans 812 708 Accrued expenses 387 407 Alternative minimum tax credits 31 31 Other 103 63 Total gross deferred tax assets 37,587 38,039 Deferred tax liabilities: Identified intangible assets and goodwill 5,392 6,311 Depreciation 2,957 2,740 Deferred loan origination costs, net 2,218 930 Unrecognized gain relating to postretirement obligation 203 70 Other * — 301 Total gross deferred tax liabilities 10,770 10,352 Net deferred tax asset $ 26,817 $ 27,687 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. As of December 31, 2015 , the Company had net operating loss carryforwards for federal income tax purposes of $3.7 million which are available to offset future federal taxable income, if any, through 2020. In addition, the Company has alternative minimum tax credit carryforwards of $31.0 thousand , which are available to reduce future federal income taxes, if any, over an indefinite period. According to Section 382 of the Internal Revenue Code, the net operating loss carryforwards and credit are subject to an annual limitation of $0.9 million . The Company has determined that a valuation allowance is not required for any of its deferred tax assets because it believes that it is more likely than not that these assets will reverse against future taxable income. For federal income tax purposes, the Company has a $1.8 million reserve for credit losses which remains subject to recapture. If any portion of the reserve is used for purposes other than to absorb the losses for which it was established, approximately 150% of the amount actually used (limited to the amount of the reserve) would be subject to taxation in the year in which used. As the Company intends to use the reserve only to absorb credit losses, no provision has been made for the $1.0 million liability that would result if 100% of the reserve were recaptured. The Company did not have any unrecognized tax benefits accrued as income tax receivables or as deferred tax items as of December 31, 2015 and 2014 . The Company files U.S. federal and state income tax returns. As of December 31, 2015 , the Company is subject to examination by the Internal Revenue Service and Massachusetts and Rhode Island tax authorities for tax years after December 31, 2011 . As of December 31, 2015 , the Company is also subject to examination for several other state tax authorities for tax years after December 31, 2009 .

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Preferred Stock The Company is authorized to issue 50,000,000 shares of serial preferred stock, par value $0.01 per share, from time to time in one or more series subject to limitations of law. The Board of Directors is authorized to fix the designations, powers, preferences, limitations and rights of the shares of each such series. As of December 31, 2015 , there were no shares of preferred stock issued. Capital Distributions and Restrictions Thereon The Company is a legal entity separate and distinct from each of the Banks and Brookline Securities Corp. The Company's primary source of revenue is dividends paid to it by the Banks and Brookline Securities Corp. The FRB has authority to prohibit the Company from paying dividends to the Company's shareholders if such payment is deemed to be an unsafe or unsound practice. The FRB has indicated generally that it may be an unsafe or unsound practice for bank holding companies to pay dividends unless the bank holding company's net income over the preceding year is sufficient to fund the dividends and the expected rate of earnings retention is consistent with the organization's capital needs, asset quality and overall financial condition. The FRB also has the authority to use its enforcement powers to prohibit the Banks from paying dividends to the Company if, in its opinion, the payment of dividends would constitute an unsafe or unsound practice. Federal law also prohibits the payment of dividends by a bank that will result in the bank failing to meet its applicable capital requirements on a pro forma basis. Payment of dividends by a bank is also restricted pursuant to various state regulatory limitations, including the Massachusetts Division of Banks in the case of Brookline Bank and First Ipswich, and the Banking Division of the Rhode Island Department of Business Regulation in the case of BankRI. Common Stock Repurchases In 2015 , 2014 and 2013 , no shares of the Company's common stock were repurchased by the Company. On October 29, 2014, the Company’s Board of Directors authorized a stock repurchase program to acquire up to $10.0 million of total outstanding shares of the Company's common stock over a period of fourteen months ending on December 31, 2015 . As of December 31, 2015 , no shares were repurchased under the stock repurchase program. On February 4, 2016, the Company's Board of Directors authorized a stock repurchase program to acquire up to $10.0 million of total outstanding shares of the Company's common stock over a period of twelve months ending on January 31, 2017. Repurchases may be made from time to time depending on market conditions and other factors, and will be conducted through open market or private transactions, through block trades, and pursuant to any trading plan that may be adopted in accordance with the Securities and Exchange Commission Rule 10b5-1. There is no guarantee as to the exact number of shares, if any, to be repurchased by the Company. Restricted Retained Earnings As part of the stock offering in 2002 and as required by regulation, Brookline Bank established a liquidation account for the benefit of eligible account holders and supplemental eligible account holders who maintain their deposit accounts at Brookline Bank after the stock offering. In the unlikely event of a complete liquidation of Brookline Bank (and only in that event), eligible depositors who continue to maintain deposit accounts at Brookline Bank shall be entitled to receive a distribution from the liquidation account. Accordingly, retained earnings of the Company are deemed to be restricted up to the balance of the liquidation account. The liquidation account balance is reduced annually to the extent that eligible depositors have reduced their qualifying deposits as of each anniversary date. Subsequent increases in deposit account balances do not restore an account holder's interest in the liquidation account The liquidation account totaled $16.6 million (unaudited), $18.4 million (unaudited), and $20.6 million (unaudited) at December 31, 2015 , 2014 and 2013 , respectively.

Regulatory Capital Requirements

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Regulatory Capital Requirements	Regulatory Capital Requirements The Company's primary source of cash is dividends from the Banks and Brookline Securities Corp. The Banks are subject to certain restrictions on the amount of dividends that they may declare without prior regulatory approval. In addition, the dividends declared cannot be in excess of the amount which would cause the Banks to fall below the minimum required for capital adequacy purposes. The Company is a bank holding company within the meaning of the Bank Holding Company Act of 1956, as amended (the "BHCA") and as such, must comply with the capital requirements of the Federal Reserve Bank (the "FRB") at the consolidated level. As member banks of the FRB, Brookline Bank, BankRI and First Ipswich are also required to comply with the regulatory capital requirement of the FRB. The FRB has promulgated regulations imposing minimum capital requirements for bank holding companies and state member banks as well as prompt corrective action regulations for state member banks that implement the system of prompt corrective action established by Section 38 of the Federal Deposit Insurance Act, as amended (the "FDIA"). Under the prompt corrective action regulations in effect as of December 31, 2015 , a bank is "well-capitalized" if it has: (1) a total risk-based capital ratio of 10.0% or greater; (2) a Tier 1 risk-based capital ratio of 8.0% or greater; (3) a common equity Tier 1 capital ratio of 6.5% or greater; (4) a Tier 1 leverage ratio of 5.0% or greater; and (5) is not subject to any written agreement, order, capital directive or prompt corrective action directive to meet and maintain a specific capital level for any capital measure. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's financial statements. Under capital adequacy guidelines, the Company and each of the Banks must meet specific capital guidelines that involve quantitative measures of the Company's and the Banks' assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. In addition, the prompt corrective action rules applicable to state member banks establish a framework of supervisory actions for state member banks that are not at least adequately capitalized. The Company's and the Banks' capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Bank holding companies are not subject to prompt corrective action requirements. However, a bank holding company is considered "well capitalized" for purpose of the FRB's Regulation Y (which can affect eligibility for expedited application processes to make acquisitions and engage in new activities) if the bank holding company maintains on a consolidated basis a total risk-based capital ratio of 10.0% or greater and a Tier 1 risk-based capital ratio of 6.0% or greater and is not subject to any written agreement under capital directive or prompt correction action directive issued by the FRB to meet and maintain a specific capital level for any capital measure. As of December 31, 2015 , the Company, Brookline Bank, BankRI and First Ipswich met all applicable minimum capital requirements and the banks were considered "well-capitalized" by their respective regulators. The Company's and the Banks' actual and required capital amounts and ratios are as follows: Actual Minimum Required for Capital Adequacy Purposes Minimum Required To Be Considered "Well-Capitalized" Under Prompt Corrective Action Rules Amount Ratio Amount Ratio Amount Ratio (Dollars in Thousands) At December 31, 2015: Brookline Bancorp, Inc. Common equity Tier 1 capital ratio (1 ) $ 530,505 10.62 % $ 225,214 4.50 % N/A N/A Tier 1 leverage capital ratio (2 ) 545,035 9.37 % 231,930 4.00 % N/A N/A Tier 1 risk-based capital ratio (3 ) 545,035 10.91 % 300,019 6.00 % N/A N/A Total risk-based capital ratio (4 ) 676,709 13.54 % 401,013 8.00 % N/A N/A Brookline Bank Common equity Tier 1 capital ratio (1 ) $ 374,002 11.89 % $ 141,548 4.50 % $ 204,459 6.50 % Tier 1 leverage capital ratio (2 ) 380,003 10.78 % 141,003 4.00 % 176,254 5.00 % Tier 1 risk-based capital ratio (3 ) 380,003 12.08 % 188,743 6.00 % 251,658 8.00 % Total risk-based capital ratio (4 ) 417,270 13.27 % 251,557 8.00 % 314,446 10.00 % BankRI Common equity Tier 1 capital ratio (1 ) $ 171,967 10.63 % $ 72,799 4.50 % $ 105,154 6.50 % Tier 1 leverage capital ratio (2 ) 171,967 8.51 % 80,831 4.00 % 101,038 5.00 % Tier 1 risk-based capital ratio (3 ) 171,967 10.63 % 97,065 6.00 % 129,420 8.00 % Total risk-based capital ratio (4 ) 189,953 11.74 % 129,440 8.00 % 161,800 10.00 % First Ipswich Common equity Tier 1 capital ratio (1 ) $ 32,831 13.87 % $ 10,652 4.50 % $ 15,386 6.50 % Tier 1 leverage capital ratio (2 ) 32,831 9.26 % 14,182 4.00 % 17,727 5.00 % Tier 1 risk-based capital ratio (3 ) 32,831 13.87 % 14,202 6.00 % 18,936 8.00 % Total risk-based capital ratio (4 ) 35,617 15.05 % 18,933 8.00 % 23,666 10.00 % At December 31, 2014: Brookline Bancorp, Inc. Tier 1 leverage capital ratio (2 ) $ 504,964 9.01 % $ 224,179 4.00 % N/A N/A Tier 1 risk-based capital ratio (3 ) 504,964 10.55 % 191,456 4.00 % N/A N/A Total risk-based capital ratio (4 ) 633,421 13.24 % 382,732 8.00 % N/A N/A Brookline Bank Tier 1 leverage capital ratio (2 ) $ 336,513 9.60 % $ 140,214 4.00 % $ 175,267 5.00 % Tier 1 risk-based capital ratio (3 ) 336,513 10.72 % 125,565 4.00 % 188,347 6.00 % Total risk-based capital ratio (4 ) 373,312 11.90 % 250,966 8.00 % 313,708 10.00 % BankRI Tier 1 leverage capital ratio (2 ) $ 150,403 8.43 % $ 71,366 4.00 % $ 89,207 5.00 % Tier 1 risk-based capital ratio (3 ) 150,403 10.70 % 56,225 4.00 % 84,338 6.00 % Total risk-based capital ratio (4 ) 166,135 11.82 % 112,443 8.00 % 140,554 10.00 % First Ipswich Tier 1 leverage capital ratio (2 ) $ 29,962 9.27 % $ 12,929 4.00 % $ 16,161 5.00 % Tier 1 risk-based capital ratio (3 ) 29,962 12.40 % 9,665 4.00 % 14,498 6.00 % Total risk-based capital ratio (4 ) 32,375 13.40 % 19,328 8.00 % 24,160 10.00 % _______________________________________________________________________________ (1) Common equity tier 1 capital ratio is calculated by dividing common equity Tier 1 capital by risk-weighted assets. The ratio was established as part of the implementation of Basel III, effective January 1, 2015. (2) Tier 1 leverage capital ratio is calculated by dividing Tier 1 capital by average assets. (3) Tier 1 risk-based capital ratio is calculated by dividing Tier 1 capital by risk-weighted assets. (4) Total risk-based capital ratio is calculated by dividing total capital by risk-weighted assets.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans Postretirement Benefits Postretirement benefits are provided for part of the annual expense of health insurance premiums for certain retired employees and their dependents. No contributions are made by the Company to invest in assets allocated for the purpose of funding this benefit obligation. The following table presents the components of net periodic postretirement benefit cost and other amounts recognized in other comprehensive income: Year Ended December 31, 2015 2014 2013 (In Thousands) Net periodic benefit expense: Service cost $ 55 $ 45 $ 61 Interest cost 49 47 47 Prior service credit (21 ) (21 ) (21 ) Actuarial gain (20 ) (40 ) (16 ) Net periodic benefit expense $ 63 $ 31 $ 71 Changes in postretirement benefit obligation recognized in other comprehensive income: Net actuarial loss (gain) $ 374 $ (477 ) $ 489 Prior service credit (21 ) (21 ) (21 ) Total pre-tax changes in postretirement benefit obligation recognized in other comprehensive income $ 353 $ (498 ) $ 468 The discount rate used to determine the actuarial present value of projected postretirement benefit obligations was 4.35% in 2015 , 4.00% in 2014 and 4.9% in 2013 . The estimated prior service credit that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2016 is $54.0 thousand . The liability for the postretirement benefits included in accrued expenses and other liabilities was $1.2 million as of December 31, 2015 and $1.6 million as of December 31, 2014 . The actual health care trend used to measure the accumulated postretirement benefit obligation in 2015 for plan participants below age 65 and for plan participants over age 65 was 7.4% and 5.0% , respectively. In 2014 , the rate for plan participants below age 65 and for plan participants over age 65 was 6.6% and less than zero percent, respectively. In 2015, there was a lower than expected increase in per capita medical expenses as compared to 2014, which created a smaller gap in the health care trend range. The rates to be used in 2016 through 2020 are expected to be in the range of 6.9% to 5.9% and to decline gradually thereafter to 5.1% . Assumed health care trend rates may have a significant effect on the amounts reported for the postretirement benefit plan. A 1% change in assumed health care cost trend rates would have the following effects: 1% Increase 1% Decrease (In Thousands) Effect on total service and interest cost components of net periodic postretirement benefit costs $ 26 $ (24 ) Effect on the accumulated postretirement benefit obligation 268 (208 ) 401(k) Plans The Company administers one 401(k) plan (the "Plan"), which is a qualified, tax-exempt profit-sharing plan with a salary deferral feature under Section 401(k) of the Internal Revenue Code. Each employee, excluding temporary employees, who has attained the age of 21 is eligible to participate in the plan by making voluntary contributions, subject to certain limits based on federal tax laws. In the Plan, the Company makes a matching contribution of the amount contributed by eligible employees, up to 5% of the employee's yearly compensation. Contributions to the Plan are subject to certain limits based on federal tax laws. Expenses associated with the plans were $2.3 million in 2015 , $2.4 million in 2014 , and $2.0 million in 2013 . Nonqualified Deferred Compensation Plan The Company also maintains a Nonqualified Deferred Compensation Plan (the "Nonqualified Plan") under which certain participants may contribute the amounts they are precluded from contributing to the Company's 401(k) plan because of the qualified plan limitations, and additional compensation deferrals that may be advantageous for personal income tax or other planning reasons. Expenses associated with the Nonqualified Plan were nominal in 2015 , 2014 and 2013 . Accrued liabilities associated with the Nonqualified Plan in 2015 , 2014 , and 2013 were $0.2 million , $0.3 million, and $0.4 million, respectively. Supplemental Executive Retirement Agreements The Company acquired two Supplemental Executive Retirement Plans (the "SERPs") as part of its acquisition of BankRI. The Company maintains the SERPs for certain senior executives under which participants are entitled to an annual retirement benefit. As of December 31, 2015 , there are 13 participants in the SERPs. The Company funded a Rabbi Trust to provide a partial funding source for the Company's liabilities under the SERPs. The Company records annual amounts related to the SERPs based on an actuarial calculation. Actuarial gains and losses are reflected immediately in the statement of income. Total expenses for benefits payable under the SERPs for the years ended December 31, 2015 , and 2014 were $0.1 million and $1.9 million, respectively. Aggregate benefits payable included in accrued expenses and other liabilities as of December 31, 2015 and 2014 were $11.2 million and $11.6 million, respectively. The nominal discount rate used to determine the actuarial present value of projected benefits under the agreements was 4.3% and 4.0% in the year 2015 and 2014 , respectively. Employee Stock Ownership Plan Brookline Bank established an Employee Stock Ownership Plan ("ESOP") on November 1, 1997. The Company's ESOP loan to Brookline Bank to purchase 546,986 shares of Company common stock is payable in quarterly installments over 30 years, bears interest at 8.50% per annum, matures December 31, 2021, and can be prepaid without penalty. The loan is repaid to the Company in the form of cash contributions from Brookline Bank, subject to federal tax law limits. The outstanding balance of the loan as of December 31, 2015 and 2014 , was $1.8 million and $2.0 million , respectively, and is eliminated in consolidation. Shares of common stock used as collateral to secure the loan are released and available for allocation to eligible employees as the principal and interest on the loan is paid. The ESOP was amended in 2015 to permit all eligible participants in the ESOP as of July 1, 2015 or any eligible participants after July 1, 2015 to be fully vested in the ESOP upon the date of eligibility. Dividends on released shares are credited to the participants' ESOP accounts. Dividends on unallocated shares of common stock are generally applied towards payment of the loan. ESOP shares committed to be released are considered outstanding in determining earnings per share. As of December 31, 2015 and 2014 , the ESOP held 213,066 and 251,382 unallocated shares, respectively at an aggregate cost of $1.1 million and $1.3 million , respectively. The market value of such shares as of December 31, 2015 and 2014 was $2.5 million and $2.5 million , respectively. Compensation and employee benefits expense related to the ESOP was $0.4 million in 2015 , 2014 , and 2013 , respectively, based on the commitment to release to eligible employees 38,316 shares in 2015 , 40,284 shares in 2014 and 42,252 shares in 2013 . Recognition and Retention Plans As of December 31, 2015 , the Company had three active recognition and retention plans: the 2003 Recognition and Retention Plan (the "2003 RRP") with 1,250,000 authorized shares, the 2011 Restricted Stock Award Plan ("2011 RSA") with 500,000 authorized shares and the 2014 Equity Incentive Plan ("2014 Plan") with 1,750,000 authorized shares. The 2003 RRP, the 2011 RSA and the 2014 Plan are collectively referred to as the "Plans". The purpose of the Plans is to promote the long-term financial success of the Company and its subsidiaries by providing a means to attract, retain and reward individuals who contribute to such success and to further align their interests with those of the Company's stockholders. Of the awarded shares, generally 50% vest ratably over three years with one-third of such shares vesting at each of the first, second and third anniversary dates of the awards. These are referred to as "time-based shares". The remaining 50% of each award has a cliff vesting schedule and will vest three years after the award date based on the level of the Company's achievement of identified performance targets in comparison to the level of achievement of such identified performance targets by a defined peer group comprised of financial institutions. These are referred to as "performance-based shares". The specific performance measure targets relate to return on assets, return on tangible equity, asset quality and total stockholder return (share price appreciation from date of award plus dividends paid as a percent of the Company's common stock share price on the date of award). If a participant leaves the Company prior to the third anniversary date of an award, any unvested shares are forfeited. Dividends declared with respect to shares awarded will be held by the Company and paid to the participant only when the shares vest. Under all the Plans, shares of the Company's common stock were reserved for issuance as restricted stock awards to officers, employees, consultants and non-employee directors of the Company. Shares issued upon vesting may be either authorized but unissued shares or reacquired shares held by the Company as treasury shares. Any shares not issued because vesting requirements are not met will be retired back to treasury and be made available again for issuance under the Plans. Total expense for the Plans was $1.4 million in 2015 , $1.2 million in 2014 and 2013 , respectively. Total income tax benefits on vested awards was $0.3 million in 2015 , $0.4 million in 2014 , and $0.2 million in 2013 . Dividends paid on unvested RRP shares, which are recognized as compensation expense, were $0.1 million in 2015 , $0.2 million in 2014 , and $30.0 thousand in 2013 . Activity under the recognition and retention plans was as follows: Restricted Stock Awards Outstanding Weighted Average Price per Share (Dollars in Thousands, Except Per Share Amounts) Recognition and Retention Plans: Outstanding at December 31, 2014 419,702 $ 9.17 Granted 247,790 11.36 Vested (126,193 ) 9.02 Forfeited / Canceled (55,264 ) 8.66 Outstanding at December 31, 2015 486,035 $ 10.37 Unrecognized compensation cost $ 3,045 Weighted average remaining recognition period (months) 28 Stock Option Plans The Company has an active equity incentive plan, the 2014 Plan. The prior plans, the "2003 Option Plan" and the "1999 Option Plan" were terminated on October 16, 2013 and April 19, 2009, respectively. The 2014 plan is an omnibus plan from which the Company may award shares of restricted stock or stock options among other types of awards. Under all the stock option plans, shares of the Company's common stock were reserved for issuance to directors, employees, consultants and non-employee directors of the Company. Shares issued upon the exercise of a stock option may be either authorized but unissued shares or reacquired shares held by the Company as treasury shares. Any shares subject to an award which expire or are terminated unexercised will again be available for issuance under the plans. The exercise price of options awarded is the fair market value of the common stock of the Company on the date the award is made. Certain of the options include a reload feature whereby an optionee exercising an option by delivery of shares of common stock would automatically be granted an additional option at the fair market value of stock when such additional option is granted equal to the number of shares so delivered. If an individual to whom a stock option was granted ceases to maintain continuous service by reason of normal retirement, death or disability, or following a change in control, all options and rights granted and not fully exercisable become exercisable in full upon the happening of such an event and shall remain exercisable for a period ranging from 3 months to 5 years. No options were granted in 2015 , 2014 , or 2013 . There was no expense for the stock option plans in 2015 , 2014 , and 2013 . In accordance with the terms of the Plans, no dividend equivalent rights were paid to holders of unexercised vested options in 2015 , 2014 or 2013 . Activity under the option plans was as follows: Options Outstanding Weighted Average Exercise Price Per Share Aggregate Intrinsic Value Weighted Average Contractual Term (In Years) (Dollars in Thousands, Except Per Share Amounts) Employee Stock Options: Outstanding at December 31, 2014 227,345 $ 10.43 Granted — — Exercised — — Forfeited / Canceled — — Outstanding at December 31, 2015 227,345 $ 10.43 $ — 3.7 Exercisable at December 31, 2015 227,345 $ 10.43 $ — 3.7

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments A description of the valuation methodologies used for assets and liabilities measured at fair value on a recurring and non-recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. There were no changes in the valuation techniques used during 2015 and 2014 . Assets and Liabilities Recorded at Fair Value on a Recurring Basis The following table set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at December 31, 2015 and 2014 : Carrying Value as of December 31, 2015 Level 1 Level 2 Level 3 Total (In Thousands) Assets: Investment securities available-for-sale: Debt securities: GSEs $ — $ 40,627 $ — $ 40,627 GSE CMOs — 193,816 — 193,816 GSE MBSs — 229,881 — 229,881 SBA commercial loan asset-backed securities — 147 — 147 Corporate debt obligations — 46,486 — 46,486 Trust preferred securities — 1,267 — 1,267 Total debt securities — 512,224 — 512,224 Marketable equity securities 977 — — 977 Total investment securities available-for-sale $ 977 $ 512,224 $ — $ 513,201 Interest-rate swaps $ — $ 8,656 $ — $ 8,656 Liabilities: Interest-rate swaps $ — $ 8,781 $ — $ 8,781 Carrying Value as of December 31, 2014 Level 1 Level 2 Level 3 Total (In Thousands) Assets: Investment securities available-for-sale: Debt securities: GSEs $ — $ 22,988 $ — $ 22,988 GSE CMOs — 234,169 — 234,169 GSE MBSs — 250,981 — 250,981 SBA commercial loan asset-backed securities — 203 — 203 Corporate debt obligations — 40,207 — 40,207 Trust preferred securities — 1,240 — 1,240 Total debt securities — 549,788 — 549,788 Marketable equity securities 973 — — 973 Total investment securities available-for-sale $ 973 $ 549,788 $ — $ 550,761 Interest-rate swaps $ — $ 2,676 $ — $ 2,676 Liabilities: Interest-rate swaps $ — $ 2,714 $ — $ 2,714 Investment Securities Available-for-Sale The fair value of investment securities is based principally on market prices and dealer quotes received from third-party and nationally-recognized pricing services for identical investment securities such as U.S. Treasury and agency securities. The Company's marketable equity securities are priced this way and are included in Level 1. These prices are validated by comparing the primary pricing source with an alternative pricing source when available. When quoted market prices for identical securities are unavailable, the Company uses market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE mortgage-related securities, SBA commercial loan asset backed securities, corporate debt securities, and trust preferred securities, all of which are included in Level 2. As of December 31, 2015 and December 31, 2014 , no investment securities were valued using pricing models included in Level 3. Additionally, Management reviews changes in fair value from period to period and performs testing to ensure that prices received from the third parties are consistent with Management's expectation of the market. Changes in the prices obtained from the pricing service are analyzed from month to month, taking into consideration changes in market conditions including changes in mortgage spreads, changes in U.S. Treasury security yields and changes in generic pricing of 15 -year and 30 -year securities. Additional analysis may include a review of prices provided by other independent parties, a yield analysis, a review of average life changes using Bloomberg analytics and a review of historical pricing for a particular security. Interest-Rate Swaps The fair values for the interest-rate swap assets and liabilities represent a Level 2 valuation and are based on settlement values adjusted for credit risks associated with the counterparties and the Company and observable market interest rate curves. Credit risk adjustments consider factors such as the likelihood of default by the Company and its counterparties, its net exposures and remaining contractual life. To date, the Company has not realized any losses due to a counterparty's inability to pay any net uncollateralized position. Refer also to Note 16, "Derivatives and Hedging Activities." The reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) is as follows for the year ended December 31, 2014: Year Ended December 31, 2015 2014 2013 (In Thousands) Investment securities available-for-sale, beginning of year $ — $ 1,775 $ 2,917 Investment security sales — (1,658 ) — Principal paydowns and other — — (1,150 ) Total realized losses included in other income — (242 ) — Total unrealized gains included in other comprehensive income — 125 8 Investment securities available-for-sale, end of year $ — $ — $ 1,775 There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during 2015 or 2014 . Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis Assets and liabilities measured at fair value on a non-recurring basis as of December 31, 2015 and 2014 are summarized below: Carrying Value as of December 31, 2015 Level 1 Level 2 Level 3 Total (In Thousands) Assets measured at fair value on a non-recurring basis: Collateral-dependent impaired loans and leases $ — $ — $ 12,137 $ 12,137 OREO — — 729 729 Repossessed assets — 614 — 614 Total assets measured at fair value on a non-recurring basis $ — $ 614 $ 12,866 $ 13,480 Carrying Value as of December 31, 2014 Level 1 Level 2 Level 3 Total (In Thousands) Assets measured at fair value on a non-recurring basis: Collateral-dependent impaired loans and leases $ — $ — $ 6,376 $ 6,376 OREO — — 953 953 Repossessed assets — 503 — 503 Total assets measured at fair value on a non-recurring basis $ — $ 503 $ 7,329 $ 7,832 Collateral-Dependent Impaired Loans and Leases For nonperforming loans and leases where the credit quality of the borrower has deteriorated significantly, fair values of the underlying collateral were estimated using purchase and sales agreements (Level 2), or comparable sales or recent appraisals (Level 3), adjusted for selling costs and other expenses. Other Real Estate Owned The Company records OREO at the lower of cost or fair value. In estimating fair value, the Company utilizes purchase and sales agreements (Level 2) or comparable sales, recent appraisals or cash flows discounted at an interest rate commensurate with the risk associated with these cash flows (Level 3), adjusted for selling costs and other expenses. Repossessed Assets Repossessed assets are carried at estimated fair value less costs to sell based on auction pricing (Level 2). The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis at the dates indicated. Fair Value Valuation Technique At December 31, 2015 At December 31, 2014 (Dollars in Thousands) Collateral-dependent impaired loans and leases $ 12,137 $ 6,376 Appraisal of collateral (1) Other real estate owned $ 729 $ 953 Appraisal of collateral (1) (1) Fair value is generally determined through independent appraisals of the underlying collateral. The Company may also use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by Management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary. Summary of Estimated Fair Values of Financial Instruments The following table presents the carrying amount, estimated fair value, and placement in the fair value hierarchy of the Company's financial instruments at the dates indicated. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, FHLBB and FRB stock and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits, short-term borrowings and accrued interest payable. Fair Value Measurements Carrying Value Estimated Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs (In Thousands) At December 31, 2015 Financial assets: Investment securities held-to-maturity: GSE $ 34,915 $ 34,819 $ — $ 34,819 $ — GSE MBSs 19,291 18,986 — 18,986 — Municipal Obligations 39,051 39,390 — 39,390 — Foreign Government Obligations 500 500 — — 500 Loans held-for-sale 13,383 13,383 — 13,383 — Loans and leases, net 4,938,801 4,857,060 — — 4,857,060 Financial liabilities: Certificates of deposit 1,087,872 1,091,906 — 1,091,906 — Borrowed funds 983,029 981,349 — 981,349 — At December 31, 2014 Financial assets: Investment securities held-to-maturity $ 500 $ 500 $ — $ — $ 500 Loans held-for-sale 1,537 1,537 — 1,537 — Loans and leases, net 4,768,948 4,753,605 — — 4,753,605 Financial liabilities: Certificates of deposit 946,708 949,320 — 949,320 — Borrowed funds 1,126,404 1,132,940 — 1,132,940 — Investment Securities Held-to-Maturity The fair values of certain investment securities held-to-maturity are estimated using market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE MBSs, and municipal obligations, all of which are included in Level 2. Additionally, fair values of foreign government obligations are based on comparisons to market prices of similar securities and are considered to be Level 3. Loans Held-for-Sale Fair value is measured using quoted market prices when available. These assets are typically categorized as Level 1. If quoted market prices are not available, comparable market values may be utilized. These assets are typically categorized as Level 2. Loans and Leases The fair values of performing loans and leases was estimated by segregating the portfolio into its primary loan and lease categories—commercial real estate mortgage, multi-family mortgage, construction, commercial, equipment financing, condominium association, indirect automobile, residential mortgage, home equity and other consumer. These categories were further disaggregated based upon significant financial characteristics such as type of interest rate (fixed / variable) and payment status (current / past-due). The Company discounts the contractual cash flows for each loan category using interest rates currently being offered for loans with similar terms to borrowers of similar quality and incorporates estimates of future loan prepayments. This method of estimating fair value does not incorporate the exit price concept of fair value. Deposits The fair values of deposit liabilities with no stated maturity (demand, NOW, savings and money market savings accounts) are equal to the carrying amounts payable on demand. The fair value of certificates of deposit represents contractual cash flows discounted using interest rates currently offered on deposits with similar characteristics and remaining maturities. The fair value estimates for deposits do not include the benefit that results from the low-cost funding provided by the Company's core deposit relationships (deposit-based intangibles). Borrowed Funds The fair value of federal funds purchased is equal to the amount borrowed. The fair value of FHLBB advances and repurchase agreements represents contractual repayments discounted using interest rates currently available for borrowings with similar characteristics and remaining maturities. The fair values reported for retail repurchase agreements are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on borrowings with similar characteristics and maturities. The fair values reported for subordinated deferrable interest debentures are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on instruments with similar terms and maturities.

Condensed Parent Company Financ

Condensed Parent Company Financial Statements	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Parent Company Financial Statements	Condensed Parent Company Financial Statements Condensed Parent Company Balance Sheets as of December 31, 2015 and 2014 and Statements of Income for the years ended December 31, 2015 , 2014 and 2013 are as follows. The Statement of Stockholders' Equity is not presented below as the parent company's stockholders' equity is that of the consolidated company. Balance Sheets At December 31, 2015 2014 (In Thousands) ASSETS Cash and due from banks $ 590 $ 3,293 Short-term investments 27,513 49,008 Total cash and cash equivalents 28,103 52,301 ESOP loan to Brookline Bank 1,752 2,002 Restricted equity securities 100 100 Premises and equipment, net 9,040 11,026 Investment in subsidiaries, at equity 681,504 628,531 Goodwill 35,267 35,267 Other assets * 2,631 4,366 Total assets * $ 758,397 $ 733,593 LIABILITIES AND STOCKHOLDERS' EQUITY Borrowed funds $ 82,936 $ 82,745 Deferred tax liability 435 721 Accrued expenses and other liabilities 7,541 8,309 Total liabilities 90,912 91,775 Stockholders' equity: Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued 757 757 Additional paid-in capital 616,899 617,475 Retained earnings, partially restricted * 109,675 84,860 Accumulated other comprehensive loss (2,476 ) (1,622 ) Treasury stock, at cost; 4,861,554 shares and 5,040,571 shares, respectively (56,208 ) (58,282 ) Unallocated common stock held by Employee Stock Ownership Plan ("ESOP"); 213,066 shares and 251,382 shares, respectively (1,162 ) (1,370 ) Total Brookline Bancorp, Inc. stockholders' equity * 667,485 641,818 Total liabilities and stockholders' equity * $ 758,397 $ 733,593 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets". Statements of Income Year Ended December 31, 2015 2014 2013 (In Thousands) Interest and dividend income: Dividend income from subsidiaries $ — $ 24,700 $ 30,000 Marketable and restricted equity securities 97 — — ESOP loan to Brookline Bank 162 183 205 Total interest and dividend income 259 24,883 30,205 Interest expense: Borrowed funds 5,063 1,746 442 Net interest income (4,804 ) 23,137 29,763 Non-interest income: Other 5 — — Total non-interest income 5 — — Non-interest expense: Compensation and employee benefits 205 2,357 2,305 Occupancy 22 38 16 Equipment and data processing 687 1,499 4,263 Directors' fees 688 656 590 Franchise taxes 113 252 223 Insurance 490 472 352 Professional services (1) 185 (113 ) 583 Other (2) (1,289 ) 751 2,040 Total non-interest expense 1,101 5,912 10,372 Income before income taxes (5,900 ) 17,225 19,391 Credit for income taxes (1,854 ) (2,705 ) (4,035 ) Income before equity in undistributed income of subsidiaries (4,046 ) 19,930 23,426 Equity in undistributed income of subsidiaries 53,828 23,358 12,589 Net income $ 49,782 $ 43,288 $ 36,015 (1) The Parent Company received a net benefit in 2014 from the intercompany allocation of expense that is eliminated in consolidation. (2) The Parent Company received a net benefit in 2015 from the intercompany allocation of expense that is eliminated in consolidation. Statements of Cash Flows Year Ended December 31, 2015 2014 2013 (In Thousands) Cash flows from operating activities: Net income attributable to parent company $ 49,782 $ 43,288 $ 36,015 Adjustments to reconcile net income to net cash provided from operating activities: Equity in undistributed income of subsidiaries (53,828 ) (23,358 ) (12,589 ) Depreciation of premises and equipment 2,728 2,563 1,810 Amortization of debt issuance costs 100 29 — Other operating activities, net 2,479 (30,822 ) 14,745 Net cash provided from (used for) operating activities 1,261 (8,300 ) 39,981 Cash flows from investing activities: Repayment of ESOP loan by Brookline Bank 250 250 250 Purchase of premises and equipment (742 ) (1,739 ) (5,458 ) Net cash used for investing activities (492 ) (1,489 ) (5,208 ) Cash flows from financing activities: Decrease in demand deposit, NOW, savings and money market accounts — — (41 ) Proceeds from issuance of subordinated notes — 73,495 — Repayment of subordinated debentures — — (3,000 ) Payment of dividends on common stock (24,967 ) (23,876 ) (23,841 ) Net cash (used for) provided from used for financing activities (24,967 ) 49,619 (26,882 ) Net (decrease) increase in cash and cash equivalents (24,198 ) 39,830 7,891 Cash and cash equivalents at beginning of year 52,301 12,471 4,580 Cash and cash equivalents at end of year $ 28,103 $ 52,301 $ 12,471

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) 2015 Quarters Fourth Third Second First (Dollars in Thousands Except Per Share Data) Interest and dividend income $ 58,448 $ 56,687 $ 55,166 $ 56,609 Interest expense 8,370 8,100 7,994 8,081 Net interest income 50,078 48,587 47,172 48,528 Provision for credit losses 1,520 1,755 1,913 2,263 Net interest income after provision for credit losses 48,558 46,832 45,259 46,265 Loan level derivative income 1,556 900 941 — Gain on sale of loans and leases held-for-sale 614 446 279 869 Other non-interest income 3,893 3,438 3,647 3,601 Amortization of identified intangible assets (724 ) (725 ) (724 ) (738 ) Other non-interest expense (31,605 ) (30,545 ) (29,728 ) (30,588 ) Income before provision for income taxes 22,292 20,346 19,674 19,409 Provision for income taxes 8,237 6,897 7,115 7,104 Net income 14,055 13,449 12,559 12,305 Less net income attributable to noncontrolling interest in subsidiary 728 561 694 602 Net income attributable to Brookline Bancorp, Inc. $ 13,327 $ 12,888 $ 11,865 $ 11,703 Earnings per share: Basic $ 0.19 $ 0.18 $ 0.17 $ 0.17 Diluted 0.19 0.18 0.17 0.17 Average common shares outstanding: Basic 70,177,382 70,129,056 70,049,829 70,036,090 Diluted 70,318,657 70,240,020 70,215,850 70,164,105 Common stock price: High $ 11.89 $ 11.66 $ 11.54 $ 10.05 Low 10.19 10.09 10.10 9.29 Dividends per share $ 0.090 $ 0.090 $ 0.090 $ 0.085 2014 Quarters Fourth Third Second First (Dollars in Thousands Except Per Share Data) Interest and dividend income $ 55,826 $ 54,616 $ 53,346 $ 54,694 Interest expense 8,250 7,292 6,912 6,960 Net interest income 47,576 47,324 46,434 47,734 Provision for credit losses 1,724 2,034 2,276 2,443 Net interest income after provision for credit losses 45,852 45,290 44,158 45,291 Loan level derivative income 562 322 62 — Gain on sales of investment securities, net 78 — (13 ) — Gain on sales of loans and leases held-for-sale 368 564 92 627 Other non-interest income 3,533 5,303 3,681 5,001 Amortization of identified intangible assets (827 ) (828 ) (827 ) (861 ) Other non-interest expense (31,628 ) (31,086 ) (30,388 ) (32,715 ) Income before provision for income taxes 17,938 19,565 16,765 17,343 Provision for income taxes 6,586 7,163 6,158 6,379 Net income 11,352 12,402 10,607 10,964 Less net income attributable to noncontrolling interest in subsidiary 477 662 476 422 Net income attributable to Brookline Bancorp, Inc. $ 10,875 $ 11,740 $ 10,131 $ 10,542 Earnings per share: Basic $ 0.16 $ 0.17 $ 0.15 $ 0.15 Diluted 0.16 0.17 0.14 0.15 Average common shares outstanding: Basic 70,024,495 69,989,909 69,886,576 69,875,473 Diluted 70,130,243 70,088,987 70,012,377 69,983,999 Common stock price: High $ 10.15 $ 9.51 $ 9.63 $ 9.70 Low 8.56 8.55 8.83 8.66 Dividends per share $ 0.085 $ 0.085 $ 0.085 $ 0.085

Basis of Presentation (Policies

Basis of Presentation (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies
Basis of Accounting	The Company's consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") as set forth by the Financial Accounting Standards Board ("FASB") in its Accounting Standards Codification and through the rules and interpretive releases of the Securities and Exchange Commission ("SEC") under the authority of federal securities laws.
Consolidation	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances are eliminated in consolidation.
Use of Estimates	In preparing these consolidated financial statements, Management is required to make significant estimates and assumptions that affect the reported amounts of assets, liabilities, income, expenses and disclosure of contingent assets and liabilities. Actual results could differ from those estimates based upon changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to significant change in the near-term include the determination of the allowance for loan and lease losses, the determination of fair market values of assets and liabilities, including acquired loans, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowance. The judgments used by Management in applying these critical accounting policies may be affected by a further and prolonged deterioration in the economic environment, which may result in changes to future financial results. For example, subsequent evaluations of the loan and lease portfolio, in light of the factors then prevailing, may result in significant changes in the allowance for loan and lease losses in future periods, and the inability to collect outstanding principal may result in increased loan and lease losses.
Reclassification	Reclassification Certain previously reported amounts have been reclassified to conform to the current year's presentation.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of reporting asset balances and cash flows, cash and cash equivalents includes cash on hand and due from banks (including cash items in process of clearing), interest-bearing deposits with banks, federal funds sold, money market mutual funds and other short-term investments with original maturities of three months or less.
Investment Securities	Investment Securities Investment securities, other than those reported as short-term investments, are classified at the time of purchase as "available-for-sale," or "held-to-maturity." Classification is periodically re-evaluated for consistency with the Company's goals and objectives. Equity investments in the Federal Home Loan Bank of Boston ("FHLBB") and the Federal Reserve Bank of Boston are discussed in more detail in Note 5, "Restricted Equity Securities." Investment Securities Available-for-Sale and Held-to-Maturity Investment securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity and carried at amortized cost. Those investment securities held for indefinite periods of time but not necessarily to maturity are classified as available-for-sale. Investment securities held for indefinite periods of time include investment securities that Management intends to use as part of its asset/liability, liquidity, and/or capital management strategies and may be sold in response to changes in interest rates, maturities, asset/liability mix, liquidity needs, regulatory capital needs or other business factors. Investment securities available-for-sale are carried at estimated fair value, primarily obtained from a third-party pricing service, with unrealized gains and losses reported on an after-tax basis in stockholders' equity as accumulated other comprehensive income or loss. As of December 31, 2015 and 2014 , the Company did not make any adjustments to the prices provided by the third-party pricing service. Security transactions are recorded on the trade date. Realized gains and losses are determined using the specific identification method and are recorded in non-interest income. Interest and dividends on securities are recorded using the accrual method. Premiums and discounts on securities are amortized or accreted into interest income using the level-yield method over the remaining period to contractual maturity, adjusted for the effect of actual prepayments in the case of mortgage-backed securities ("MBSs") and collateralized mortgage obligations ("CMOs"). These estimates of prepayment assumptions are made based upon the actual performance of the underlying security, current interest rates, the general market consensus regarding changes in mortgage interest rates, the contractual repayment terms of the underlying loans, the priority rights of the investors to the cash flows from the mortgage securities and other economic conditions. When differences arise between anticipated prepayments and actual prepayments, the effective yield is recalculated to reflect actual payments to date and anticipated future payments. Unamortized premium or discount is adjusted to the amount that would have existed had the new effective yield been applied since purchase, with a corresponding charge or credit to interest income. Management evaluates securities for other-than-temporary impairment ("OTTI") on a periodic basis. Factors considered in determining whether an impairment is OTTI include: (1) the length of time and the extent to which the fair value has been less than amortized cost, (2) projected future cash flows, (3) the financial condition and near-term prospects of the issuers, and (4) the intent and ability of the Company to hold the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The Company records an OTTI loss in an amount equal to the entire difference between the fair value and amortized cost if: (1) the Company intends to sell an impaired investment security, (2) it is more likely than not that the Company will be required to sell the investment security before its amortized costs, or (3) for debt securities, the present value of expected future cash flows is not sufficient to recover the entire amortized cost basis. If an investment security is determined to be OTTI but the Company does not intend to sell the investment security, only the credit portion of the estimated loss is recognized in earnings, with the non credit portion of the loss recognized in other comprehensive income. Restricted Equity Securities The Company invests in the stock of the FHLBB, the Federal Reserve Bank of Boston and a small amount of other restricted securities. No ready market exists for these stocks, and they have no quoted market values. The Banks, as members of the FHLBB, are required to maintain investments in the capital stock of the FHLBB equal to their membership base investments plus an activity-based investment determined according to the Banks' level of outstanding FHLBB advances. Federal Reserve Bank of Boston stock was purchased at par and is redeemable at par.
Loans	Loans Originated Loans Loans the Company originates for the portfolio, and for which it has the intent and ability to hold to maturity, are reported at amortized cost, inclusive of deferred loan origination fees and expenses, less unadvanced funds due borrowers on loans and the allowance for loan and lease losses. Interest income on loans and leases originated for the portfolio is accrued on unpaid principal balances as earned. Loan origination fees and direct loan origination costs are deferred, and the net fee or cost is recognized in interest income using the interest method. Deferred amounts are recognized for fixed-rate loans over the contractual life of the loans and for adjustable-rate loans over the period of time required to adjust the contractual interest rate to a yield approximating a market rate at the origination date. If a loan is prepaid, the unamortized portion of the loan origination costs, including third party referral related costs not subject to rebate from the dealer, is charged to income. Loans and Leases Held-for-Sale Management identifies and designates certain newly originated loans and leases for sale to specific financial institutions, subject to the underwriting criteria of those financial institutions. These loans and leases are held for sale and are carried at the lower of cost or market as determined in the aggregate. Deferred loan fees and costs are included in the determination of the gain or loss on sale. Acquired Loans Acquired loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the recorded fair value of the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairment. Valuation allowances on these impaired loans reflect only losses incurred after the acquisition (meaning the present value of all cash flows expected at acquisition that ultimately are not to be received).
Non-Performing Loans	Nonperforming Loans Nonaccrual Loans Accrual of interest on loans generally is discontinued when contractual payment of principal or interest becomes past due 90 days or, if in Management's judgment, reasonable doubt exists as to the full timely collection of interest. Exceptions may be made if the loan has matured and is in the process of renewal or is well-secured and in the process of collection. When a loan is placed on nonaccrual status, interest accruals cease and uncollected accrued interest is reversed and charged against current interest income. Interest payments on nonaccrual loans are generally applied to principal. If collection of the principal is reasonably assured, interest payments are recognized as income on the cash basis. Loans are generally returned to accrual status when principal and interest payments are current, full collectability of principal and interest is reasonably assured and a consistent record of at least six consecutive months of performance has been achieved. Impaired Loans A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. Smaller-balance, homogeneous loans that are evaluated collectively for impairment, such as residential, home equity and other consumer loans are specifically excluded from the impaired loan portfolio except where the loan is classified as a troubled debt restructuring. The Company has defined the population of impaired loans to include nonaccrual loans and troubled debt restructured ("TDR") loans. When the ultimate collectability of the total principal of an impaired loan or lease is in doubt and the loan is on nonaccrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan or lease is not in doubt and the loan or lease is on nonaccrual status, contractual interest is credited to interest income when received, under the cash basis method. The value of an impaired loan is measured based upon the present value of expected future cash flows discounted at the loan's effective interest rate, or the fair value of the collateral if the loan is collateral-dependent and its payment is expected solely based on the underlying collateral. For impaired loans deemed collateral dependent, where impairment is measured using the fair value of the collateral, the Company will either obtain a new appraisal or use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Interest collected on impaired loans is either applied against principal or reported as income according to Management's judgment as to the collectability of principal. If Management does not consider a loan ultimately collectible within an acceptable time frame, payments are applied as principal to reduce the loan balance. If full collection of the remaining recorded investment should subsequently occur, interest receipts are recorded as interest income on a cash basis. Troubled Debt Restructured Loans In cases where a borrower experiences financial difficulties and the Company makes certain concessionary modifications to contractual terms, the loan is classified as a TDR loan. In determining whether a debtor is experiencing financial difficulties, the Company considers, among other factors, whether the debtor is in payment default or is likely to be in payment default in the foreseeable future without the modification, if the debtor declared or is in the process of declaring bankruptcy, there is substantial doubt that the debtor will continue as a going concern, the debtor's entity-specific projected cash flows will not be sufficient to service its debt, or the debtor cannot obtain funds from sources other than the existing creditors at market terms for debt with similar risk characteristics. Large groups of small-balance homogeneous loans such as residential real estate, residential construction, home equity and other consumer portfolios are collectively evaluated for impairment. As such, the Company does not typically identify individual loans within these groupings as impaired loans or for impairment evaluation and disclosure. However, the Company evaluates all TDRs for impairment on an individual loan basis regardless of loan type. Modifications may include interest-rate reductions, short-term (defined as one year or less) changes in payment structure to interest-only payments, short-term extensions of the loan's original contractual term, or less frequently, principal forgiveness, interest capitalization, forbearance and other actions intended to minimize economic loss and avoid foreclosure or repossession of collateral. Typically, TDRs are placed on nonaccrual status and reported as nonperforming loans. Generally, a nonaccrual loan that is restructured remains on nonaccrual for a period of six months to demonstrate that the borrower can meet the restructured terms; however, performance prior to the restructuring, or significant events that coincide with the restructuring, are considered in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of restructuring or after a shorter performance period. If the borrower's ability to meet the revised payment schedule is not reasonably assured, the loan remains classified as a nonaccrual loan. Loans restructured at an interest rate equal to or greater than that of a new loan with comparable risk at the time the loan agreement is modified may be excluded from restructured loan disclosures in years subsequent to the restructuring if they are in compliance with the modified terms.
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses Management has established a methodology to determine the adequacy of the allowance for loan and lease losses that assesses the risks and losses inherent in the loan and lease portfolio. Additions to the allowance for loan and lease losses are made by charges to the provision for credit losses. Losses on loans and leases are charged off against the allowance when all or a portion of a loan or lease is considered uncollectible. Subsequent recoveries on loans previously charged off, if any, are credited to the allowance when realized. Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. For purposes of determining the allowance for loan and lease losses, the Company has segmented certain loans and leases in the portfolio by product type into the following segments: (1) commercial real estate loans, (2) commercial loans and leases, (3) and consumer loans. Portfolio segments are further disaggregated into classes based on the associated risks within the segments. Commercial real estate loans are divided into three classes: commercial real estate mortgage loans, multi-family mortgage loans, and construction loans. Commercial loans and leases are divided into three classes: commercial loans which includes taxi medallion loans, equipment financing, and loans to condominium associations. Consumer loans are divided into four classes: residential mortgage loans, home equity loans, indirect automobile loans, and other consumer loans. A formula-based credit evaluation approach is applied to each group, coupled with an analysis of certain loans for impairment. The general allowance related to loans collectively evaluated for impairment is determined using a formula-based approach utilizing the risk ratings of individual credits and loss factors derived from historic portfolio loss rates, which include estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analysis which studied the time from the first indication of elevated risk of repayment (or other early event indicating a problem) to eventual charge-off to support the LEP considered in the allowance calculation. This reserving methodology established the approximate number of months of LEP that represents incurred losses for each portfolio. In addition to quantitative measures, relevant qualitative factors include, but are not limited to: (1) levels and trends in past due and impaired loans, (2) levels and trends in charge-offs, (3) changes in underwriting standards, policy exceptions, and credit policy, (4) experience of lending management and staff, (5) economic trends, (6) industry conditions, (7) effects of changes in credit concentrations, (8) interest rate environment, and (9) regulatory and other changes. The general allowance related to the acquired loans collectively evaluated for impairment is determined based upon the degree, if any, of deterioration in the pooled loans subsequent to acquisition. The qualitative factors used in the determination are the same as those used for originated loans. During 2015, the Company enhanced and refined its general allowance methodology. Under the enhanced methodology, Management combined the historical loss histories of the Banks to generate a single set of historical loss ratios. Management believes it is appropriate to aggregate the ratios as the Banks share common environmental factors, operate in similar geographic markets, and utilize common underwriting standards in accordance with the Company's Credit Policy. In prior periods, a historical loss history applicable to each Bank was used. Management employed a similar analysis for the consolidation of the qualitative factors as it did for the quantitative factors. Again, Management believes the realignment of the existing nine qualitative factors used at each of the Banks into a single group of factors used for the Company is appropriate based on the commonality of environmental factors, markets and underwriting standards among the Banks. In prior periods each of the Banks utilized a set of qualitative factors applicable to each Bank. The Company’s December 31, 2015 allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. As of December 31, 2015 , this portfolio is approximately $35.8 million . Based on industry conditions, Management established a specific loss factor for this portfolio that best represents the changing risks associated with it. Based on the refinements to the Company’s allowance methodology discussed above, Management determined that the potential risks anticipated by the unallocated allowance are now incorporated into the allowance methodology, making the unallocated allowance unnecessary. In prior periods, the unallocated allowance was used to recognize the estimated risk associated with the allocated general and specific allowances. It incorporated Management’s evaluation of existing conditions that were not included in the allocated allowance determinations and provided for losses that arise outside of the ordinary course of business. Specific valuation allowances are established for impaired originated loans with book values greater than the discounted present value of expected future cash flows or, in the case of collateral-dependent impaired loans, for any excess of a loan's book balance and the fair value of its underlying collateral. Specific valuation allowances are established for acquired loans with deterioration in the discounted present value of expected future cash flows since acquisitions or, in the case of collateral dependent impaired loans, for any increase in the excess of a loan's book balance greater than the fair value of its underlying collateral. A specific valuation allowance for losses on TDR loans is determined by comparing the net carrying amount of the troubled debt restructured loan with the restructured loan's cash flows discounted at the original effective rate. Impaired loans are reviewed quarterly with adjustments made to the calculated reserve as necessary. As of December 31, 2015 , Management believes that the methodology for calculating the allowance is sound and that the allowance provides a reasonable basis for determining and reporting on probable losses in the Company’s loan portfolios. Liability for Unfunded Commitments In the ordinary course of business, the Company enters into commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses.
Premises and Equipment	Premises and Equipment Premises and equipment are carried at cost less accumulated depreciation and amortization, except for land which is carried at cost. Premises and equipment are depreciated using the straight-line method over the estimated useful life of the assets. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or the estimated useful life of the improvements. Costs related to internal-use software development projects that provide significant new functionality are capitalized. Internal-use software is software acquired or modified solely to meet the Company's needs and for which there is no plan to market the software externally. Direct and indirect costs associated with the application development stage of internal use software are capitalized until such time that the software is substantially complete and ready for its intended use. Capitalized costs are amortized on a straight-line basis over the remaining estimated life of the software. Computer software and development costs incurred in the preliminary project stage, as well as training and maintenance costs, are expensed as incurred.
Leases	Leases The Company leases properties for offices and branches in the states of Massachusetts, Rhode Island and New York. Lease terms range from five years to over 25 years with options to renew. Management performs an analysis to determine proper lease accounting at lease inception and for each renewal. If a lease meets any of the following four criteria, the lease is classified as capital lease. The four criteria are: transfer of ownership by the end of lease term; contains bargain purchase option; lease term is at least 75% of the property’s estimated remaining economic life; or present value of the minimum lease payment is at least 90% of the fair value of the leased property. The Company did not have any capital leases as of December 31, 2015 or 2014 . All leases are classified as operating leases and rental payments are expensed as incurred. Certain leases contain rent escalation clauses which are amortized over the life of the lease under the straight-line method.
Bank-Owned Life Insurance	Bank-Owned Life Insurance The Company acquired bank-owned life insurance ("BOLI") plans as part of its acquisitions of First Ipswich and BankRI. BOLI represents life insurance on the lives of certain current and former employees who have provided positive consent allowing their employer to be the beneficiary of such policies. BankRI and First Ipswich are the beneficiaries of their respective policies. BankRI and First Ipswich utilize BOLI as tax-efficient financing for their benefit obligations to their employees, including their retirement obligations and Supplemental Executive Retirement Plans ("SERPs"). Since BankRI and First Ipswich are the primary beneficiaries of their respective insurance policies, increases in the cash value of the policies, as well as insurance proceeds received, are recorded in non-interest income and are not subject to income taxes. BOLI is recorded at the cash value of the policies, less any applicable cash surrender charges, and is reflected as an asset in the accompanying consolidated balance sheets. Cash proceeds, if any, are classified as cash flows from investing activities. The Company reviews the financial strength of the insurance carriers prior to the purchase of BOLI to ensure minimum credit ratings of at least investment grade. The financial strength of the carriers is reviewed at least annually, and BOLI with any individual carrier is limited to 10% of the Company's capital and 25% of the Company's capital in the aggregate.
Goodwill and Other Identified Intangible Assets	Goodwill and Other Identified Intangible Assets Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired. Goodwill and indefinite-lived identified intangible assets are not subject to amortization. Definite-lived identified intangible assets are assets resulting from acquisitions that are being amortized over their estimated useful lives. The recoverability of goodwill and identified intangible assets is evaluated for impairment at least annually. As part of this evaluation, the Company makes a qualitative assessment of whether it is more likely than not that the fair value of an acquired asset is greater than its carrying amount. If the Company qualitatively concludes that it is more likely than not that the fair value of an acquired asset is greater than its carrying amount, no further testing is necessary. If, however, the Company qualitatively concludes that it is more likely than not that the fair value of an acquired asset is less than its carrying value, the Company performs a two-step quantitative impairment test to determine whether the asset is impaired. If impairment is deemed to have occurred, the amount of impairment is charged to expense when identified. The Company did not have any impairment as of December 31, 2015 and 2014 .
OREO and Other Repossessed Assets	OREO and Other Repossessed Assets OREO and other repossessed assets consists of properties acquired through foreclosure, real estate acquired through acceptance of a deed in lieu of foreclosure and loans determined to be substantively repossessed. Real estate loans that are substantively repossessed include only those loans for which the Company has taken possession of the collateral. OREO and other repossessed assets which consist of vehicles and equipment, if any, are recorded initially at estimated fair value less costs to sell, resulting in a new cost basis. The amount by which the recorded investment in the loan exceeds the fair value (net of estimated cost to sell) of the foreclosed or repossessed asset is charged to the allowance for loan and lease losses. Such evaluations are based on an analysis of individual properties/assets as well as a general assessment of current real estate market conditions. Subsequent declines in the fair value of the foreclosed or repossessed asset below the new cost basis are recorded through the use of a valuation allowance. Subsequent increases in the fair value are recorded as reductions in the allowance, but not below zero. Rental revenue received on foreclosed or repossessed assets is included in other non-interest income, whereas operating expenses and changes in the valuation allowance relating to foreclosed and repossessed assets are included in other non-interest expense. Certain costs used to improve such properties are capitalized. Gains and losses from the sale of OREO and other repossessed assets are reflected in non-interest expense when realized. Together with nonperforming loans, OREO and repossessed assets comprise nonperforming assets.
Derivatives	Derivatives The Company enters into interest rate swap agreements as part of the Company's interest-rate risk management strategy for certain assets and liabilities and not for speculative purposes. Based on the Company's intended use for the interest rate swap at inception, the Company designates the derivative as either an economic hedge of an asset or liability, or a hedging instrument subject to the hedge accounting provisions of FASB ASC Topic 815, "Derivatives and Hedging." Interest rate swaps designated as economic hedges are recorded at fair value within other assets or liabilities. Changes in the fair value of these derivatives are recorded directly through earnings at each reporting period.
Transfer of Financial Assets	Transfer of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Securities Sold under Agreements to Repurchase	Securities Sold under Agreements to Repurchase The Company enters into sales of securities under agreements to repurchase with the Banks' commercial customers. These agreements are treated as financings, and the obligations to repurchase securities sold are reflected as a liability in the consolidated balance sheets. Securities pledged as collateral under agreements to repurchase are reflected as assets in the accompanying consolidated balance sheets.
Employee Benefits	Employee Benefits Costs related to the Company's 401(k) plan are recognized in current operations. Costs related to the Company's nonqualified deferred compensation plan, SERPs and postretirement benefits are recognized over the vesting period or the related service periods of the participating employees. Changes in the funded status of postretirement benefits are recognized through comprehensive income in the year in which changes occur. Compensation expense for the Company's Employee Stock Ownership Program ("ESOP") is recorded at an amount equal to the shares allocated by the ESOP multiplied by the average fair market value of the shares during the year. The Company recognizes compensation expense ratably over the year based upon the Company's estimate of the number of shares expected to be allocated by the ESOP. The difference between the average fair market value and the cost of the shares allocated by the ESOP is recorded as an adjustment to additional paid-in capital. The fair value of restricted stock awards and stock option grants are determined as of the grant date and are recorded as compensation expense over the period in which the shares of restricted stock awards and stock options vest. Forfeitures are estimated in determining compensation expense.
Fair Value Measurements	Fair Value Measurements ASC 820-10, "Fair Value Measurements and Disclosures," defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities. It is not a forced transaction. Market participants are buyers and sellers in the principal market that are independent, knowledgeable, able to transact, and willing to transact. A fair-value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs are included in ASC 820. The fair value hierarchy is as follows: Level 1: Inputs are unadjusted quoted prices in active markets for assets and liabilities identical to those reported at fair value. Level 2: Inputs other than quoted prices included within Level 1. Level 2 inputs are observable either directly or indirectly. These inputs might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3: Inputs are unobservable inputs for an asset or liability that reflect an entity's own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. These inputs are used to determine fair value only when observable inputs are not available.
Earnings per Common Share	Earnings per Common Share Basic earnings per share ("EPS") is computed by dividing net income by the weighted average number of shares of common stock outstanding for the applicable period, exclusive of Treasury shares, unearned ESOP shares and unvested shares of restricted stock. Diluted EPS is calculated after adjusting the denominator of the basic EPS calculation for the effect of all potential dilutive common shares outstanding during the period. The dilutive effects of options and unvested restricted stock awards are computed using the "treasury stock" method. Management evaluated the "two class" method and concluded that the method did not apply to the Company's EPS calculation.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Tax positions that are more likely than not to be sustained upon a tax examination are recognized in the Company's financial statements to the extent that the benefit is greater than 50% likely of being recognized. Interest resulting from underpayment of income taxes is classified as income tax expense in the first period the interest would begin accruing according to the provision of the relevant tax law. Penalties resulting from underpayment of income taxes are classified as income tax expense in the period for which the Company claims or expects to claim an uncertain tax position or in the period in which the Company's judgment changes regarding an uncertain tax position.
Treasury Stock	Treasury Stock Any shares repurchased under the Company's share repurchase programs were purchased in open-market transactions and are held as treasury stock. Treasury stock also consists of common stock withheld to satisfy federal, state and local income tax withholding requirements for employee restricted stock awards upon vesting. All treasury stock is held at cost.
Segment Reporting	Segment Reporting An operating segment is defined as a component of a business for which separate financial information is available that is evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and evaluate performance. The Company is a bank holding company with subsidiaries engaged in the business of banking and activities closely related to banking. The Company's banking business provided substantially all of its total revenues and pre-tax income in 2015 , 2014 and 2013 . Therefore, the Company has determined there to be a single segment.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2016-02, Leases. This ASU requires lessees to put most leases on their balance sheet but recognize expenses on their income statements in a manner similar to today's accounting. This ASU also eliminates today's real estate-specific provisions for all companies. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods therein. Early adoption is permitted. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of December 31, 2015 . In January 2016, the FASB issued ASU 2016-01, Financial Instruments. This ASU significantly revises an entity’s accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amends certain disclosure requirements associated with the fair value of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods therein. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of December 31, 2015 . In August 2015, the FASB issued ASU 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements . This ASU was issued to clarify the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements, since this was not addressed in the guidance in ASU 2015-03, which requires entities to present debt issuance costs related to a recognized debt liability as a direct deduction from the carrying amount of that debt liability. Given the absence of authoritative guidance with ASU 2015-03, ASU 2015-15 states that the SEC staff will not object to an entity deferring and presenting debt issuance costs related to line-of-credit arrangements as an asset and subsequently amortizing the deferred debt issuance costs ratably over the terms of the line-of-credit arrangement. As of December 31, 2015 , the Company has accounted for the debt issuance costs related to the line-of-credit arrangement as a reduction of the debt liability, consistent with ASU 2015-03 and with the Company’s accounting treatment for other debt issuance costs. Management has determined that this ASU had no impact to the Company. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date . This ASU was issued to defer the effective date of ASU 2014-09 for all entities by one year. In effect, public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance in ASU 2014-09 to annual reporting periods (including interim reporting periods within those period) beginning after December 15, 2017. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of December 31, 2015 . In June 2015, the FASB issued ASU 2015-10, Technical Corrections and Improvements. This ASU represent changes to clarify the Codification, correct unintended application of guidance, or make minor improvements to the Codification that are not expected to have a significant effect on current accounting practice or create a significant administrative cost to most entities. This ASU is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted, including adoption in an interim period. All other amendments will be effective upon issuance. Management has determined that this ASU had no impact to the Company as of December 31, 2015 . In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. This ASU requires that all debt issuance costs be presented in the balance sheet as direct deductions from the carrying amount of the related debt liability. Amortization of the costs is reported as interest expense. This ASU is applied retrospectively for the first interim or annual period presented beginning after December 15, 2015, early adoption is permitted. As of December 31, 2015 , the Company has accounted for its debt issuance cost as a reduction of the debt liability. In January 2015, the FASB issued ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. This ASU eliminates from U.S. GAAP the concept of extraordinary items. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. Management has determined that this ASU had no impact to the Company as of December 31, 2015 .

Cash and Short-Term Investments

Cash and Short-Term Investments (Tables)	12 Months Ended
	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Short-term investments	Short-term investments are summarized as follows: At December 31, 2015 2014 (In Thousands) FRB interest bearing reserve $ 34,575 $ 19,789 FHLB overnight deposits 9,573 5,708 Federal funds sold 2,588 322 Other interest bearing deposits — 11 Total short-term investments $ 46,736 $ 25,830

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of securities available-for-sale securities	The following tables set forth investment securities available-for-sale and held-to-maturity at the dates indicated: At December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In Thousands) Investment securities available-for-sale: Debt securities: GSEs $ 40,658 $ 141 $ 172 $ 40,627 GSE CMOs 198,000 45 4,229 193,816 GSE MBSs 230,213 1,098 1,430 229,881 SBA commercial loan asset-backed securities 148 — 1 147 Corporate debt obligations 46,160 344 18 46,486 Trust preferred securities 1,466 — 199 1,267 Total debt securities 516,645 1,628 6,049 512,224 Marketable equity securities 956 21 — 977 Total investment securities available-for-sale $ 517,601 $ 1,649 $ 6,049 $ 513,201 Investment securities held-to-maturity: GSEs $ 34,915 $ 9 $ 105 $ 34,819 GSEs MBSs 19,291 — 305 18,986 Municipal obligations 39,051 364 25 39,390 Foreign government securities 500 — — 500 Total investment securities held-to-maturity $ 93,757 $ 373 $ 435 $ 93,695 At December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In Thousands) Investment securities available-for-sale: Debt securities: GSEs $ 22,929 $ 88 $ 29 $ 22,988 GSE CMOs 238,910 80 4,821 234,169 GSE MBSs 249,329 2,531 879 250,981 SBA commercial loan asset-backed securities 205 — 2 203 Corporate debt obligations 39,805 403 1 40,207 Trust preferred securities 1,463 — 223 1,240 Total debt securities 552,641 3,102 5,955 549,788 Marketable equity securities 947 26 — 973 Total investment securities available-for-sale $ 553,588 $ 3,128 $ 5,955 $ 550,761 Investment securities held-to-maturity: Foreign government securities $ 500 $ — $ — $ 500 Total investment securities held-to-maturity $ 500 $ — $ — $ 500
Investment securities in a continuous unrealized loss position	Investment securities as of December 31, 2015 and 2014 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows: At December 31, 2015 Less than Twelve Months Twelve Months or Longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (In Thousands) Investment securities available-for-sale: GSEs $ 19,633 $ 172 $ — $ — $ 19,633 $ 172 GSE CMOs 89,680 1,294 100,473 2,935 190,153 4,229 GSE MBSs 133,779 845 16,968 585 150,747 1,430 SBA commercial loan asset-backed securities — — 139 1 139 1 Corporate debt obligations 6,181 18 — — 6,181 18 Trust preferred securities — — 1,267 199 1,267 199 Temporarily impaired debt securities available-for-sale 249,273 2,329 118,847 3,720 368,120 6,049 Investment securities held-to-maturity: GSEs 25,837 105 — — 25,837 105 GSEs MBSs 18,834 305 — — 18,834 305 Municipal obligations 7,629 25 — — 7,629 25 Temporarily impaired debt securities held-to-maturity 52,300 435 — — 52,300 435 Total temporarily impaired securities $ 301,573 $ 2,764 $ 118,847 $ 3,720 $ 420,420 $ 6,484 At December 31, 2014 Less than Twelve Months Twelve Months or Longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (In Thousands) Investment securities available-for-sale: GSEs $ 11,086 $ 29 $ — $ — $ 11,086 $ 29 GSE CMOs 39,095 179 190,345 4,642 229,440 4,821 GSE MBSs 50,099 84 39,555 795 89,654 879 SBA commercial loan asset-backed securities 8 — 186 2 194 2 Corporate debt obligations 4,069 1 — — 4,069 1 Trust preferred securities and pools — — 1,240 223 1,240 223 Total temporarily impaired investment securities available-for-sale $ 104,357 $ 293 $ 231,326 $ 5,662 $ 335,683 $ 5,955
Schedule of maturities of the investments in debt securities	The final stated maturities of the debt securities are as follows at the dates indicated: At December 31, 2015 2014 Amortized Cost Estimated Fair Value Weighted Average Rate Amortized Cost Estimated Fair Value Weighted Average Rate (Dollars in Thousands) Investment securities available-for-sale: Within 1 year $ 2,999 $ 3,003 2.09 % $ 3,057 $ 3,081 3.00 % After 1 year through 5 years 59,729 60,249 2.32 % 55,631 56,586 2.48 % After 5 years through 10 years 100,658 100,833 2.05 % 103,268 104,208 2.00 % Over 10 years 353,259 348,139 1.97 % 390,685 385,913 1.91 % $ 516,645 $ 512,224 2.03 % $ 552,641 $ 549,788 1.99 % Investment securities held-to-maturity: Within 1 year $ 651 $ 651 1.00 % $ — $ — — % After 1 year through 5 years 23,888 23,866 1.52 % 500 500 1.30 % After 5 years through 10 years 50,078 50,344 2.00 % $ — $ — — % Over 10 years 19,140 18,834 1.82 % $ — $ — — % $ 93,757 $ 93,695 1.83 % $ 500 $ 500 — %
Schedule of sales of investment securities	Sales of investment securities are summarized as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Sales of debt securities $ — $ 5,084 $ 1,210 Sales of marketable equity securities — 401 — Gross gains from sales — 380 626 Gross losses from sales — 315 229 Gain on sales of securities, net $ — $ 65 $ 397

Restricted Equity Securities (T

Restricted Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2015
Restricted Investments Note [Abstract]
Components of investments in the restricted equity securities of various entities	Investments in the restricted equity securities of various entities are as follows: At December 31, 2015 2014 (In Thousands) FHLBB stock $ 48,890 $ 58,326 Federal Reserve Bank of Boston stock 16,752 16,003 Other restricted equity securities 475 475 $ 66,117 $ 74,804

Loans and Leases (Tables)

Loans and Leases (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Summary of loan and lease balances for the originated and acquired portfolios	The following tables present loan and lease balances and weighted average coupon rates for the originated and acquired loan and lease portfolios at the dates indicated: At December 31, 2015 Originated Acquired Total Balance Weighted Average Coupon Balance Weighted Average Coupon Balance Weighted Average Coupon (Dollars In Thousands) Commercial real estate loans: Commercial real estate $ 1,684,548 4.00 % $ 191,044 4.15 % $ 1,875,592 4.02 % Multi-family mortgage 620,865 3.92 % 37,615 4.35 % 658,480 3.94 % Construction 129,742 3.60 % 580 5.08 % 130,322 3.61 % Total commercial real estate loans 2,435,155 3.96 % 229,239 4.19 % 2,664,394 3.98 % Commercial loans and leases: Commercial 576,599 3.90 % 15,932 5.65 % 592,531 3.95 % Equipment financing 712,988 7.05 % 8,902 6.14 % 721,890 7.04 % Condominium association 59,875 4.50 % — — % 59,875 4.50 % Total commercial loans and leases 1,349,462 5.59 % 24,834 5.83 % 1,374,296 5.59 % Indirect automobile loans 13,678 5.53 % — — % 13,678 5.53 % Consumer loans: Residential mortgage 527,846 3.64 % 88,603 3.85 % 616,449 3.67 % Home equity 234,708 3.35 % 79,845 3.99 % 314,553 3.51 % Other consumer 12,039 4.77 % 131 17.40 % 12,170 4.91 % Total consumer loans 774,593 3.57 % 168,579 3.93 % 943,172 3.63 % Total loans and leases $ 4,572,888 4.38 % $ 422,652 4.18 % $ 4,995,540 4.36 % At December 31, 2014 Originated Acquired Total Balance Weighted Average Coupon Balance Weighted Average Coupon Balance Weighted Average Coupon (Dollars In Thousands) Commercial real estate loans: Commercial real estate $ 1,425,621 4.18 % $ 254,461 4.29 % $ 1,680,082 4.20 % Multi-family mortgage 576,214 4.11 % 63,492 4.50 % 639,706 4.15 % Construction 146,074 3.79 % 1,939 5.50 % 148,013 3.81 % Total commercial real estate loans 2,147,909 4.13 % 319,892 4.34 % 2,467,801 4.16 % Commercial loans and leases: Commercial 462,730 3.88 % 51,347 4.14 % 514,077 3.91 % Equipment financing 587,496 6.92 % 13,928 6.22 % 601,424 6.90 % Condominium association 51,593 4.60 % — — % 51,593 4.60 % Total commercial loans and leases 1,101,819 5.53 % 65,275 4.58 % 1,167,094 5.48 % Indirect automobile loans 316,987 4.47 % — — % 316,987 4.47 % Consumer loans: Residential mortgage 472,078 3.60 % 99,842 3.77 % 571,920 3.63 % Home equity 181,580 3.35 % 105,478 3.85 % 287,058 3.53 % Other consumer 11,580 5.13 % 167 16.35 % 11,747 5.29 % Total consumer loans 665,238 3.56 % 205,487 3.82 % 870,725 3.62 % Total loans and leases $ 4,231,953 4.43 % $ 590,654 4.19 % $ 4,822,607 4.40 %
Schedule of activity in the accretable yield for acquired loan portfolio	The following table summarizes activity in the accretable yield for the acquired loan portfolio for the periods indicated: Year Ended December 31, 2015 2014 2013 (In Thousands) Balance at beginning of year $ 32,044 $ 45,789 $ 57,812 Accretion (10,467 ) (15,805 ) (20,500 ) Reclassification from nonaccretable difference for loans with improved cash flows 4,483 2,060 8,477 Changes in expected cash flows that do not affect nonaccretable difference (1) (5,264 ) — — Balance at end of year $ 20,796 $ 32,044 $ 45,789 (1) Represents changes in interest cash flows due to changes in interest rates on variable rate loans.
Summary of the change in the total amounts of loans and advances, all of which were performing, to directors, executive officers and their affiliates	The following table summarizes the change in the total amounts of loans and advances, to directors, executive officers and their affiliates for the periods indicated. All loans were performing as of December 31, 2015 . Year Ended December 31, 2015 2014 (In Thousands) Balance at beginning of year $ 8,574 $ 4,783 New loans granted during the year 9,931 2,375 Loans reclassified as insider loans 21,481 — Advances on lines of credit 840 1,787 Repayments (1,344 ) (182 ) Loan no longer classified as an insider loan (2,107 ) (189 ) Balance at end of year $ 37,375 $ 8,574

Allowance for Loan and Lease 37

Allowance for Loan and Lease Losses (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Schedule of changes in the allowance for loan and lease losses	The following tables present the changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment for the periods indicated: Year Ended December 31, 2015 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2014 $ 29,594 $ 15,957 $ 2,331 $ 3,359 $ 2,418 $ 53,659 Charge-offs (550 ) (3,634 ) (1,788 ) (582 ) — (6,554 ) Recoveries — 667 1,442 102 — 2,211 Provision (credit) for loan and lease losses 1,107 9,028 (1,716 ) 1,422 (2,418 ) 7,423 Balance at December 31, 2015 $ 30,151 $ 22,018 $ 269 $ 4,301 $ — $ 56,739 Year Ended December 31, 2014 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2013 $ 23,022 $ 15,220 $ 3,924 $ 3,375 $ 2,932 $ 48,473 Charge-offs (130 ) (2,507 ) (1,163 ) (650 ) — (4,450 ) Recoveries 4 801 434 158 — 1,397 Provision (credit) for loan and lease losses 6,698 2,443 (864 ) 476 (514 ) 8,239 Balance at December 31, 2014 $ 29,594 $ 15,957 $ 2,331 $ 3,359 $ 2,418 $ 53,659 Year Ended December 31, 2013 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Balance at December 31, 2012 $ 20,018 $ 10,655 $ 5,304 $ 2,545 $ 2,630 $ 41,152 Charge-offs (88 ) (2,077 ) (1,714 ) (909 ) — (4,788 ) Recoveries 13 657 501 263 — 1,434 Provision (credit) for loan and lease losses 3,079 5,985 (167 ) 1,476 302 10,675 Balance at December 31, 2013 $ 23,022 $ 15,220 $ 3,924 $ 3,375 $ 2,932 $ 48,473
Provisions for credit losses	The provisions for credit losses are set forth below for the periods indicated: Originated Acquired Total Year Ended December 31, Year Ended December 31, Year Ended December 31, 2015 2014 2013 2015 2014 2013 2015 2014 2013 (In Thousands) Provision (credit) for loan and lease losses: Commercial real estate $ 1,459 $ 5,009 $ 2,563 $ (352 ) $ 1,689 $ 516 $ 1,107 $ 6,698 $ 3,079 Commercial 9,077 2,030 4,917 (49 ) 413 1,068 9,028 2,443 5,985 Indirect automobile (1,716 ) (864 ) (167 ) — — — (1,716 ) (864 ) (167 ) Consumer 953 417 286 469 59 1,190 1,422 476 1,476 Unallocated (2,418 ) (514 ) 302 — — — (2,418 ) (514 ) 302 Total provision for loan and lease losses 7,355 6,078 7,901 68 2,161 2,774 7,423 8,239 10,675 Unfunded credit commitments 28 238 254 — — — 28 238 254 Total provision for credit losses $ 7,383 $ 6,316 $ 8,155 $ 68 $ 2,161 $ 2,774 $ 7,451 $ 8,477 $ 10,929
Summary of the recorded investments by credit quality indicator, by loan class	The following tables present the recorded investment in loans in each class as of December 31, 2015 by credit quality indicator. At December 31, 2015 Commercial Real Estate Multi- Family Mortgage Construction Commercial Equipment Financing Condominium Association Other Consumer (In Thousands) Originated: Loan rating: Pass $ 1,668,891 $ 619,786 $ 129,534 $ 562,615 $ 709,381 $ 59,875 $ 12,017 OAEM 12,781 788 208 9,976 804 — — Substandard 780 291 — 1,714 1,414 — 22 Doubtful 2,096 — — 2,294 1,389 — — Total originated 1,684,548 620,865 129,742 576,599 712,988 59,875 12,039 Acquired: Loan rating: Pass 182,377 35,785 580 11,959 8,902 — 131 OAEM 1,202 612 — 902 — — — Substandard 7,066 1,218 — 3,071 — — — Doubtful 399 — — — — — — Total acquired 191,044 37,615 580 15,932 8,902 — 131 Total loans $ 1,875,592 $ 658,480 $ 130,322 $ 592,531 $ 721,890 $ 59,875 $ 12,170 As of December 31, 2015 , there were no loans categorized as definite loss. At December 31, 2015 Indirect Automobile ($ In Thousands) Originated: Credit score: Over 700 $ 5,435 39.7 % 661-700 1,965 14.4 % 660 and below 6,217 45.5 % Data not available 61 0.4 % Total loans $ 13,678 100.0 % At December 31, 2015 Residential Mortgage Home Equity ($ In Thousands) ($ In Thousands) Originated: Loan-to-value ratio: Less than 50% $ 118,628 19.2 % $ 131,584 41.8 % 50% - 69% 214,390 34.8 % 51,492 16.4 % 70% - 79% 173,774 28.2 % 32,916 10.5 % 80% and over 17,808 2.9 % 18,082 5.7 % Data not available 3,246 0.5 % 634 0.2 % Total originated 527,846 85.6 % 234,708 74.6 % Acquired: Loan-to-value ratio: Less than 50% 18,857 3.1 % 48,563 15.4 % 50%—69% 32,986 5.3 % 20,623 6.6 % 70%—79% 17,883 2.9 % 7,144 2.3 % 80% and over 14,011 2.3 % 2,650 0.8 % Data not available 4,866 0.8 % 865 0.3 % Total acquired 88,603 14.4 % 79,845 25.4 % Total loans $ 616,449 100.0 % $ 314,553 100.0 % The following tables present the recorded investment in loans in each class as of December 31, 2014 by credit quality indicator. At December 31, 2014 Commercial Real Estate Multi- Family Mortgage Construction Commercial Equipment Financing Condominium Association Other Consumer (In Thousands) Originated: Loan rating: Pass $ 1,402,121 $ 574,972 $ 146,074 $ 447,778 $ 583,340 $ 51,593 $ 11,540 OAEM 22,491 1,242 — 12,193 932 — — Substandard 1,009 — — 1,671 2,338 — 40 Doubtful — — — 1,088 886 — — Total originated 1,425,621 576,214 146,074 462,730 587,496 51,593 11,580 Acquired: Loan rating: Pass 237,439 60,837 1,709 43,925 13,795 — 167 OAEM 8,351 713 230 1,852 — — — Substandard 8,250 1,942 — 5,424 133 — — Doubtful 421 — — 146 — — — Total acquired 254,461 63,492 1,939 51,347 13,928 — 167 Total loans $ 1,680,082 $ 639,706 $ 148,013 $ 514,077 $ 601,424 $ 51,593 $ 11,747 As of December 31, 2014 , there were no loans categorized as definite loss. At December 31, 2014 Indirect Automobile ($ In Thousands) Originated: Credit score: Over 700 $ 262,160 82.7 % 661-700 43,422 13.7 % 660 and below 9,927 3.1 % Data not available 1,478 0.5 % Total loans $ 316,987 100.0 % At December 31, 2014 Residential Mortgage Home Equity ($ In Thousands) ($ In Thousands) Originated: Loan-to-value ratio: Less than 50% $ 105,342 18.4 % $ 113,541 39.5 % 50%—69% 179,319 31.4 % 35,660 12.4 % 70%—79% 166,467 29.1 % 27,123 9.4 % 80% and over 19,335 3.4 % 4,195 1.5 % Data not available 1,615 0.3 % 1,061 0.4 % Total originated 472,078 82.6 % 181,580 63.2 % Acquired: Loan-to-value ratio: Less than 50% 19,574 3.4 % 70,293 24.5 % 50%—69% 35,131 6.2 % 22,581 7.9 % 70%—79% 22,972 4.0 % 10,569 3.7 % 80% and over 16,268 2.8 % 1,178 0.4 % Data not available 5,897 1.0 % 857 0.3 % Total acquired 99,842 17.4 % 105,478 36.8 % Total loans $ 571,920 100.0 % $ 287,058 100.0 %
Information regarding troubled debt restructuring loans	The following table presents information regarding foreclosed residential real estate property at the dates indicated: At December 31, 2015 At December 31, 2014 (In Thousands) Foreclosed residential real estate property held by the creditor $ 362 $ 410 Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure 298 — The following table sets forth information regarding troubled debt restructured loans and leases at the dates indicated: At December 31, 2015 At December 31, 2014 (In Thousands) Troubled debt restructurings: On accrual $ 17,953 $ 14,815 On nonaccrual 4,965 5,625 Total troubled debt restructurings $ 22,918 $ 20,440
Information regarding the aging of past due loans, by loan class	The following tables present an age analysis of the recorded investment in total loans and leases as of December 31, 2015 and 2014 . At December 31, 2015 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Originated: Commercial real estate loans: Commercial real estate $ 1,782 $ — $ 2,097 $ 3,879 $ 1,680,669 $ 1,684,548 $ — $ 2,876 Multi-family mortgage — — 16 16 620,849 620,865 16 291 Construction 652 — — 652 129,090 129,742 — — Total commercial real estate loans 2,434 — 2,113 4,547 2,430,608 2,435,155 16 3,167 Commercial loans and leases: Commercial 4,578 1,007 2,368 7,953 568,646 576,599 24 3,586 Equipment financing 1,681 595 2,143 4,419 708,569 712,988 77 2,610 Condominium association 205 124 — 329 59,546 59,875 — — Total commercial loans and leases 6,464 1,726 4,511 12,701 1,336,761 1,349,462 101 6,196 Indirect automobile 1,058 335 106 1,499 12,179 13,678 — 675 Consumer loans: Residential mortgage 1,384 — 229 1,613 526,233 527,846 — 1,873 Home equity 390 237 9 636 234,072 234,708 — 319 Other consumer 19 2 25 46 11,993 12,039 — 29 Total consumer loans 1,793 239 263 2,295 772,298 774,593 — 2,221 Total originated loans and leases $ 11,749 $ 2,300 $ 6,993 $ 21,042 $ 4,551,846 $ 4,572,888 $ 117 $ 12,259 At December 31, 2015 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Acquired: Commercial real estate loans: Commercial real estate $ 1,336 $ 369 $ 7,588 $ 9,293 $ 181,751 $ 191,044 $ 4,982 $ 2,606 Multi-family mortgage — — 1,077 1,077 36,538 37,615 1,077 — Construction — — — — 580 580 — — Total commercial real estate loans 1,336 369 8,665 10,370 218,869 229,239 6,059 2,606 Commercial loans and leases: Commercial 351 23 2,967 3,341 12,591 15,932 325 2,678 Equipment financing — — — — 8,902 8,902 — — Total commercial loans and leases 351 23 2,967 3,341 21,493 24,834 325 2,678 Consumer loans: Residential mortgage 326 216 2,399 2,941 85,662 88,603 2,047 352 Home equity 1,012 386 460 1,858 77,987 79,845 142 1,438 Other consumer — — — — 131 131 — — Total consumer loans 1,338 602 2,859 4,799 163,780 168,579 2,189 1,790 Total acquired loans and leases $ 3,025 $ 994 $ 14,491 $ 18,510 $ 404,142 $ 422,652 $ 8,573 $ 7,074 Total loans and leases $ 14,774 $ 3,294 $ 21,484 $ 39,552 $ 4,955,988 $ 4,995,540 $ 8,690 $ 19,333 At December 31, 2014 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Originated: Commercial real estate loans: Commercial real estate $ 1,631 $ 416 $ 160 $ 2,207 $ 1,423,414 $ 1,425,621 $ — $ 1,009 Multi-family mortgage 385 — — 385 575,829 576,214 — — Construction — — — — 146,074 146,074 — — Total commercial real estate loans 2,016 416 160 2,592 2,145,317 2,147,909 — 1,009 Commercial loans and leases: Commercial 758 876 1,499 3,133 459,597 462,730 2 2,722 Equipment financing 1,534 138 2,392 4,064 583,432 587,496 — 3,214 Condominium association 501 — — 501 51,092 51,593 — — Total commercial loans and leases 2,793 1,014 3,891 7,698 1,094,121 1,101,819 2 5,936 Indirect automobile 4,635 923 166 5,724 311,263 316,987 — 645 Consumer loans: Residential mortgage — — 501 501 471,577 472,078 — 1,340 Home equity 75 52 129 256 181,324 181,580 — 161 Other consumer 17 5 30 52 11,528 11,580 — 41 Total consumer loans 92 57 660 809 664,429 665,238 — 1,542 Total originated loans and leases $ 9,536 $ 2,410 $ 4,877 $ 16,823 $ 4,215,130 $ 4,231,953 $ 2 $ 9,132 At December 31, 2014 Past Due Loans and Leases Past Due Greater Than 90 Days and Accruing 31-60 Days 61-90 Days Greater Than 90 Days Total Current Total Loans and Leases Nonaccrual Loans and Leases (In Thousands) Acquired: Commercial real estate loans: Commercial real estate $ 989 $ 3,705 $ 2,387 $ 7,081 $ 247,380 $ 254,461 $ 2,387 $ — Multi-family mortgage 195 729 363 1,287 62,205 63,492 363 — Construction — — — — 1,939 1,939 — — Total commercial real estate loans 1,184 4,434 2,750 8,368 311,524 319,892 2,750 — Commercial loans and leases: Commercial 712 488 3,033 4,233 47,114 51,347 624 2,474 Equipment financing 2 52 66 120 13,808 13,928 73 9 Total commercial loans and leases 714 540 3,099 4,353 60,922 65,275 697 2,483 Consumer loans: Residential mortgage — — 2,715 2,715 97,127 99,842 2,372 342 Home equity 1,005 733 923 2,661 102,817 105,478 187 1,757 Other consumer — — — — 167 167 — — Total consumer loans 1,005 733 3,638 5,376 200,111 205,487 2,559 2,099 Total acquired loans and leases $ 2,903 $ 5,707 $ 9,487 $ 18,097 $ 572,557 $ 590,654 $ 6,006 $ 4,582 Total loans and leases $ 12,439 $ 8,117 $ 14,364 $ 34,920 $ 4,787,687 $ 4,822,607 $ 6,008 $ 13,714
Impaired loans and leases, by loan and leases class	The following tables include the recorded investment and unpaid principal balances of impaired loans and leases with the related allowance amount, if applicable, for the originated and acquired loan and lease portfolios at the dates indicated. Also presented are the average recorded investments in the impaired loans and leases and the related amount of interest recognized during the period that the impaired loans were impaired. At December 31, 2015 At December 31, 2014 Recorded (1) Unpaid Related Recorded Investment (2) Unpaid Related (In Thousands) Originated: With no related allowance recorded: Commercial real estate $ 2,758 $ 2,756 $ — $ 2,751 $ 2,748 $ — Commercial 14,097 14,074 — 13,440 13,421 — Consumer 4,582 4,575 — 3,055 3,048 — Total originated with no related allowance recorded 21,437 21,405 — 19,246 19,217 — With an allowance recorded: Commercial real estate 6,150 6,150 2,167 4,119 4,119 108 Commercial 2,215 2,213 1,202 2,019 2,011 768 Consumer — — — 176 176 10 Total originated with an allowance recorded 8,365 8,363 3,369 6,314 6,306 886 Total originated impaired loans and leases 29,802 29,768 3,369 25,560 25,523 886 Acquired: With no related allowance recorded: Commercial real estate 7,035 7,035 — 9,413 9,428 — Commercial 4,053 4,052 — 6,049 6,047 — Consumer 7,549 7,565 — 6,688 6,688 — Total acquired with no related allowance recorded 18,637 18,652 — 22,150 22,163 — With an allowance recorded: Commercial real estate 2,606 2,606 148 244 244 22 Commercial 486 486 112 478 478 214 Consumer 174 174 9 225 225 41 Total acquired with an allowance recorded 3,266 3,266 269 947 947 277 Total acquired impaired loans and leases 21,903 21,918 269 23,097 23,110 277 Total impaired loans and leases $ 51,705 $ 51,686 $ 3,638 $ 48,657 $ 48,633 $ 1,163 (1) Includes originated and acquired nonaccrual loans of $9.3 million and $7.1 million , respectively as of December 31, 2015 . (2) Includes originated and acquired nonaccrual loans of $7.1 million and $4.6 million , respectively as of December 31, 2014 . Year Ended December 31, 2015 December 31, 2014 December 31, 2013 Average Interest Average Interest Average Interest (In Thousands) Originated: With no related allowance recorded: Commercial real estate $ 3,999 $ 86 $ 2,786 $ 102 $ 2,184 $ 92 Commercial 15,143 641 11,840 343 4,257 144 Consumer 4,267 65 3,166 42 1,077 30 Total originated with no related allowance recorded 23,409 792 17,792 487 7,518 266 With an allowance recorded: Commercial real estate 5,132 197 3,223 69 1,464 43 Commercial 5,650 10 2,285 51 1,781 29 Consumer 84 — 458 15 3,210 97 Total originated with an allowance recorded 10,866 207 5,966 135 6,455 169 Total originated impaired loans and leases 34,275 999 23,758 622 13,973 435 Acquired: With no related allowance recorded: Commercial real estate 9,200 125 10,884 350 9,639 251 Commercial 4,428 65 6,875 122 5,205 129 Consumer 7,837 62 6,701 28 1,333 20 Total acquired with no related allowance recorded 21,465 252 24,460 500 16,177 400 With an allowance recorded: Commercial real estate 713 — 942 76 2,765 42 Commercial 638 — 631 15 577 5 Consumer 249 8 281 3 — — Total acquired with an allowance recorded 1,600 8 1,854 94 3,342 47 Total acquired impaired loans and leases 23,065 260 26,314 594 19,519 447 Total impaired loans and leases $ 57,340 $ 1,259 $ 50,072 $ 1,216 $ 33,492 $ 882
Schedule of the impaired and non-impaired loans and leases, by loan and leases class	The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated: At December 31, 2015 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Allowance for Loan and Lease Losses: Originated: Individually evaluated for impairment $ 2,167 $ 1,202 $ — $ — $ — $ 3,369 Collectively evaluated for impairment 26,857 20,545 269 3,947 — 51,618 Total originated loans and leases 29,024 21,747 269 3,947 — 54,987 Acquired: Individually evaluated for impairment 148 112 — 9 — 269 Collectively evaluated for impairment 333 71 — 45 — 449 Acquired with deteriorated credit quality 646 88 — 300 — 1,034 Total acquired loans and leases 1,127 271 — 354 — 1,752 Total allowance for loan and lease losses $ 30,151 $ 22,018 $ 269 $ 4,301 $ — $ 56,739 Loans and Leases: Originated: Individually evaluated for impairment $ 8,907 $ 15,806 $ — $ 4,471 $ — $ 29,184 Collectively evaluated for impairment 2,426,248 1,333,656 13,678 770,122 — 4,543,704 Total originated loans and leases 2,435,155 1,349,462 13,678 774,593 — 4,572,888 Acquired: Individually evaluated for impairment 3,188 4,090 — 2,606 — 9,884 Collectively evaluated for impairment 63,857 12,081 — 105,146 — 181,084 Acquired with deteriorated credit quality 162,194 8,663 — 60,827 — 231,684 Total acquired loans and leases 229,239 24,834 — 168,579 — 422,652 Total loans and leases $ 2,664,394 $ 1,374,296 $ 13,678 $ 943,172 $ — $ 4,995,540 At December 31, 2014 Commercial Real Estate Commercial Indirect Automobile Consumer Unallocated Total (In Thousands) Allowance for Loan and Lease Losses: Originated: Individually evaluated for impairment $ 108 $ 768 $ — $ 10 $ — $ 886 Collectively evaluated for impairment 27,457 14,631 2,331 3,088 2,418 49,925 Total originated loans and leases 27,565 15,399 2,331 3,098 2,418 50,811 Acquired: Individually evaluated for impairment — 144 — 41 — 185 Collectively evaluated for impairment 648 222 — 2 — 872 Acquired with deteriorated credit quality 1,381 192 — 218 — 1,791 Total acquired loans and leases 2,029 558 — 261 — 2,848 Total allowance for loan and lease losses $ 29,594 $ 15,957 $ 2,331 $ 3,359 $ 2,418 $ 53,659 Loans and Leases: Originated: Individually evaluated for impairment $ 6,870 $ 15,459 $ — $ 3,231 $ — $ 25,560 Collectively evaluated for impairment 2,141,039 1,086,360 316,987 662,007 — 4,206,393 Total originated loans and leases 2,147,909 1,101,819 316,987 665,238 — 4,231,953 Acquired: Individually evaluated for impairment 626 4,458 — 2,562 — 7,646 Collectively evaluated for impairment 97,141 38,504 — 134,973 — 270,618 Acquired with deteriorated credit quality 222,125 22,313 — 67,952 — 312,390 Total acquired loans and leases 319,892 65,275 — 205,487 — 590,654 Total loans and leases $ 2,467,801 $ 1,167,094 $ 316,987 $ 870,725 $ — $ 4,822,607
Summary of loans restructured or defaulted	The recorded investment in troubled debt restructurings and the associated specific allowances for loan and lease losses, in the originated and acquired loan and lease portfolios, that were modified during the periods indicated, are as follows. At and for the Year Ended December 31, 2015 Recorded Investment Specific Allowance for Loan and Lease Losses Defaulted (1) Number of Loans/ Leases At Modification At End of Period Nonaccrual Loans and Leases Additional Commitment Number of Loans/ Leases Recorded Investment (Dollars in Thousands) Originated: Commercial real estate — $ — $ — $ — $ — $ — — $ — Commercial 9 5,757 5,497 119 258 — 1 237 Equipment financing 1 112 100 — — — — — Residential mortgage 1 100 150 — 151 — — — Home equity 3 353 298 — 99 — 1 28 Total originated 14 6,322 6,045 119 508 — 2 265 Acquired: Commercial 4 642 632 — — — 1 11 Home equity 2 200 196 — — — 1 24 Total acquired 6 842 828 — — — 2 35 Total loans and leases 20 $ 7,164 $ 6,873 $ 119 $ 508 $ — 4 $ 300 (1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated. At and for the Year Ended December 31, 2014 Recorded Investment Specific Allowance for Loan and Lease Losses Defaulted (1) Number of Loans/ Leases At Modification At End of Period Nonaccrual Loans and Leases Additional Commitment Number of Loans/ Leases Recorded Investment (Dollars in Thousands) Originated: Commercial real estate 1 $ 953 $ 932 $ — $ — $ — — $ — Commercial 6 2,884 2,948 — 628 — 3 615 Equipment financing 6 984 936 15 169 — 4 636 Residential mortgage 1 496 — — — — — — Home Equity 2 400 402 — — — — — Total originated 16 5,717 5,218 15 797 — 7 1,251 Acquired: Commercial 6 1,369 1,406 — 66 — 1 419 Home Equity 1 190 189 — — — — — Total acquired 7 1,559 1,595 — 66 — 1 419 Total loans and leases 23 $ 7,276 $ 6,813 $ 15 $ 863 $ — 8 $ 1,670 (1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated. At and for the Year Ended December 31, 2013 Recorded Investment Specific Allowance for Loan and Lease Losses Defaulted (1) Number of Loans/ Leases At Modification At End of Period Nonaccrual Loans and Leases Number of Loans/ Leases Recorded Investment (Dollars in Thousands) Originated: Commercial real estate 1 $ 1,039 $ — $ — $ — — $ — Commercial 2 926 918 — — — — Equipment financing 5 1,557 1,415 77 861 2 371 Residential mortgage 1 415 353 — 353 — — Total originated 9 3,937 2,686 77 1,214 2 371 Acquired: Commercial real estate 1 737 727 — — — — Commercial 6 3,209 3,135 — 1,335 1 1,335 Total acquired 7 3,946 3,862 — 1,335 1 1,335 Total loans and leases 16 $ 7,883 $ 6,548 $ 77 $ 2,549 3 $ 1,706 (1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.
Schedule of troubled debt restructurings by type of modification	The following table sets forth the Company's end-of-period balances for troubled debt restructurings that were modified during the periods indicated, by type of modification. Year Ended December 31, 2015 2014 2013 (In Thousands) Loans with one modification: Extended maturity $ 2,215 $ 3,241 $ 3,841 Adjusted principal — — 908 Adjusted interest rate — — 755 Interest only 1,335 16 — Combination maturity, principal, interest rate 692 479 554 Total loans modified once $ 4,242 $ 3,736 $ 6,058 Loans with more than one modification: Extended maturity $ 2,598 $ 1,951 $ 490 Interest only — 292 — Combination maturity, principal, interest rate 33 834 — Total loans modified more than once $ 2,631 $ 3,077 $ 490

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	Premises and equipment consist of the following: At December 31, Estimated Useful Life 2015 2014 (In Thousands) (In Years) Land $ 7,562 $ 7,562 NA Office building and improvements 81,466 78,461 10 to 40 Furniture, fixtures and equipment 13,019 12,224 5 to 25 Vehicles 221 144 3 to 5 Computer Equipment 8,677 8,400 3 Core processing system and software 18,933 18,496 3 to 7.5 Total 129,878 125,287 Accumulated depreciation and amortization 51,722 44,668 Total premises and equipment $ 78,156 $ 80,619

Goodwill and Other Intangible39

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in the carrying value of goodwill	The changes in the carrying value of goodwill for the periods indicated were as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Balance at beginning of year $ 137,890 $ 137,890 $ 137,890 Additions — — — Adjustments to original goodwill — — — Balance at end of year $ 137,890 $ 137,890 $ 137,890
Schedule of composition of other intangible assets	The following is a summary of the Company's other intangible assets: At December 31, 2015 At December 31, 2014 Gross Accumulated Carrying Gross Accumulated Carrying (In Thousands) Other intangible assets: Core deposits $ 36,172 $ 26,628 $ 9,544 $ 36,172 $ 23,717 $ 12,455 Trade name 1,600 511 1,089 1,600 511 1,089 Trust relationship 1,568 1,568 — 1,568 1,568 — Other intangible 442 442 — 442 442 — Total other intangible assets $ 39,782 $ 29,149 $ 10,633 $ 39,782 $ 26,238 $ 13,544
Schedule of estimated aggregate future amortization expense for intangible assets	The estimated aggregate future amortization expense for other intangible assets for each of the next five years and thereafter is as follows: Year ended December 31: Amount (In Thousands) 2016 $ 2,500 2017 2,089 2018 1,669 2019 1,295 2020 944 Thereafter 1,047 Total $ 9,544

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of information regarding the Company's investments in affordable housing projects	Further information regarding the Company's investments in affordable housing projects follows: At December 31, 2015 2014 2013 (In Thousands) Investments in affordable housing projects included in other assets $ 11,604 $ 10,131 $ 10,301 Unfunded commitments related to affordable housing projects included in other liabilities 3,163 2,608 2,904 Investment in affordable housing tax credits included in other liabilities 1,588 1,432 1,105 Investment in affordable housing tax benefits included in other liabilities 656 669 553 For the year ended December 31, 2015 (In Thousands) Investment amortization included in provision for income taxes $ 1,654 Amount recognized as income tax benefit 656
Schedule of Adjustments for Adoption of New Accounting Pronouncement	The following table illustrates the prior period adjustments related to the adoption of ASU 2014-01. At December 31, 2014 (In Thousands) Other assets, as reported $ 79,411 Prior period adjustment 1,068 Other assets, as adjusted $ 80,479 Retained earnings, as reported $ 83,792 Prior period adjustment 1,068 Retained earnings, as adjusted $ 84,860 For the year ended December 31, 2014 2013 (In Thousands) Loss from investments in affordable housing projects, as reported $ (2,060 ) $ (1,812 ) Prior period adjustment 2,060 1,812 Loss from investments in affordable housing projects, as adjusted $ — $ — Provision for income taxes, as reported $ 24,749 $ 19,481 Prior period adjustment 1,537 1,183 Provision for income taxes, as adjusted $ 26,286 $ 20,664 Net income, as reported $ 42,765 $ 35,386 Prior period adjustment 523 629 Net income, as adjusted $ 43,288 $ 36,015 Basic earnings per share, as reported $ 0.61 $ 0.51 Prior period adjustment 0.01 0.01 Basic earnings per share, as adjusted $ 0.62 $ 0.52 Effective tax rate, as reported 35.5 % 34.4 % Prior period adjustment 1.2 % 0.9 % Effective tax rate, as adjusted 36.7 % 35.3 %

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Summary of deposits	A summary of deposits follows: December 31, 2015 December 31, 2014 Amount Weighted Average Rate Amount Weighted Average Rate (Dollars in Thousands) Demand checking accounts $ 799,117 — $ 726,118 — NOW accounts 283,972 0.07 % 235,063 0.07 % Savings accounts 540,788 0.25 % 531,727 0.21 % Money market accounts 1,594,269 0.44 % 1,518,490 0.52 % Total core deposit accounts 3,218,146 0.26 % 3,011,398 0.31 % Certificate of deposit accounts maturing: Within six months 320,975 0.65 % 363,258 0.70 % After six months but within 1 year 395,516 0.83 % 258,379 0.72 % After 1 year but within 2 years 226,513 1.02 % 232,658 1.08 % After 2 years but within 3 years 60,730 1.42 % 36,685 1.49 % After 3 years but within 4 years 30,002 1.78 % 24,059 1.32 % After 4 years but within 5 years 53,717 1.88 % 31,630 1.75 % 5+ Years 419 1.82 % 39 1.34 % Total certificate of deposit accounts 1,087,872 0.93 % 946,708 0.88 % Total deposits $ 4,306,018 0.43 % $ 3,958,106 0.44 %
Schedule of interest expense on deposit balances	Interest expense on deposit balances is summarized as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Interest-bearing deposits: NOW accounts $ 179 $ 171 $ 173 Savings accounts 1,094 1,197 1,288 Money market accounts 6,935 7,846 8,220 Certificate of deposit accounts 9,272 7,846 9,092 Total interest-bearing deposits $ 17,480 $ 17,060 $ 18,773

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of borrowed funds	Borrowed funds are comprised of the following: At December 31, 2015 2014 (In Thousands) Advances from the FHLBB $ 861,866 $ 1,004,026 Subordinated debentures and notes 82,936 82,763 Other borrowed funds 38,227 39,615 Total borrowed funds $ 983,029 $ 1,126,404
Schedule of interest expense on borrowed funds	Interest expense on borrowed funds for the periods indicated is as follows: Year Ended December 31, 2015 2014 2013 (In Thousands) Advances from the FHLBB $ 9,950 $ 10,535 $ 10,886 Subordinated debentures and notes 5,001 1,740 439 Other borrowed funds 114 79 68 Total interest expense on borrowed funds $ 15,065 $ 12,354 $ 11,393
Schedule of federal home loan bank advances	FHLBB advances mature as follows: At December 31, 2015 2014 Amount Callable Amount Weighted Average Rate Amount Callable Amount Weighted Average Rate (Dollars in Thousands) Within 1 year $ 575,749 $ 30,599 0.70 % $ 583,000 $ — 0.52 % Over 1 year to 2 years 228,422 114,922 1.89 % 217,054 31,353 0.89 % Over 2 years to 3 years 36,476 10,038 2.46 % 145,326 116,828 2.43 % Over 3 years to 4 years 5,342 — 2.17 % 36,550 10,054 2.46 % Over 4 years to 5 years 91 — 2.04 % 5,416 — 2.21 % Over 5 years 15,786 — 4.21 % 16,680 — 4.18 % $ 861,866 $ 155,559 1.16 % $ 1,004,026 $ 158,235 1.02 %
Schedule of information concerning repurchase agreements during the period	Information concerning repurchase agreements is as follows for the periods indicated below: Year Ended December 31, 2015 2014 (Dollars In Thousands) Outstanding at end of year $ 38,227 $ 39,633 Average outstanding for the year 34,468 28,724 Maximum outstanding at any month-end 38,231 39,633 Weighted average rate at end of year 0.19 % 0.16 % Weighted average rate paid for the year 0.33 % 0.28 %
Summary of subordinated debentures	The following table summarizes the Company's subordinated debentures and notes at the dates indicated. Carrying Amount Issue Date Rate Maturity Date Next Call Date December 31, 2015 December 31, 2014 (Dollars in Thousands) June 26, 2003 Variable; 3-month LIBOR + 3.10% June 26, 2033 March 28, 2016 $ 4,725 $ 4,696 March 17, 2004 Variable; 3-month LIBOR + 2.79% March 17, 2034 March 17, 2016 $ 4,589 $ 4,543 September 15, 2014 6.0% Fixed-to-Variable; 3-month LIBOR + 3.315% September 15, 2029 September 15, 2024 $ 73,624 $ 73,524

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of financial instruments with off-balance sheet risk	Financial instruments with off-balance-sheet risk at the dates indicated follow: At December 31, 2015 2014 (In Thousands) Financial instruments whose contract amounts represent credit risk: Commitments to originate loans and leases: Commercial real estate $ 36,000 $ 107,179 Commercial 78,017 102,353 Residential mortgage 19,430 20,520 Unadvanced portion of loans and leases 648,291 629,351 Unused lines of credit: Home equity 280,786 244,603 Other consumer 12,383 10,876 Other commercial 529 728 Unused letters of credit: Financial standby letters of credit 12,389 16,762 Performance standby letters of credit 392 3,126 Commercial and similar letters of credit 821 50 Back-to-back interest rate swaps 490,632 109,362
Schedule of future minimum rental payments under noncancellable operating leases	A summary of future minimum rental payments under such leases at the dates indicated follows: Year ended December 31, Minimum Rental Payments (In Thousands) 2016 $ 4,933 2017 4,472 2018 4,071 2019 3,220 2020 2,664 Thereafter 13,521 Total $ 32,881

Earnings per Share (EPS) (Table

Earnings per Share (EPS) (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Reconciliation of basic EPS and diluted EPS	The following table is a reconciliation of basic EPS and diluted EPS: For the year ended December 31, 2015 2014 2013 Basic Fully Diluted Basic Fully Diluted Basic Fully Diluted (Dollars in Thousands, Except Per Share Amounts) Numerator: Net income* $ 49,782 $ 49,782 $ 43,288 $ 43,288 $ 36,015 $ 36,015 Denominator: Weighted average shares outstanding 70,098,561 70,098,561 69,945,028 69,945,028 69,808,164 69,808,164 Effect of dilutive securities — 137,307 — 109,787 — 75,760 Adjusted weighted average shares outstanding 70,098,561 70,235,868 69,945,028 70,054,815 69,808,164 69,883,924 EPS * $ 0.71 $ 0.71 $ 0.62 $ 0.62 $ 0.52 $ 0.52 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Comprehensive Income_(Loss) (Ta

Comprehensive Income/(Loss) (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Schedule of changes in accumulated other comprehensive (loss) income by component, net of tax	Changes in accumulated other comprehensive (loss) income by component, net of tax, were as follows for the periods indicated: Year Ended December 31, 2015 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive (Loss)/Income (In Thousands) Balance at December 31, 2014 $ (1,733 ) $ 111 $ (1,622 ) Other comprehensive (loss) income (1,094 ) 240 (854 ) Balance at December 31, 2015 $ (2,827 ) $ 351 $ (2,476 ) Year Ended December 31, 2014 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive Income/(Loss) (In Thousands) Balance at December 31, 2013 $ (8,332 ) $ 417 $ (7,915 ) Other comprehensive income (loss) 6,599 (306 ) 6,293 Balance at December 31, 2014 $ (1,733 ) $ 111 $ (1,622 ) Year Ended December 31, 2013 Investment Securities Available-for-Sale Postretirement Benefits Accumulated Other Comprehensive Income (In Thousands) Balance at December 31, 2012 $ 3,358 $ 125 $ 3,483 Other comprehensive (loss) income (11,690 ) 292 (11,398 ) Balance at December 31, 2013 $ (8,332 ) $ 417 $ (7,915 )
Summary of the amounts reclassified from accumulated other comprehensive income (loss)	The following is a summary of the amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015 , 2014 , and 2013 . Year Ended December 31, Income Statement Line Affected by Reclassification 2015 2014 2013 (In Thousands) Other Comprehensive Income (Loss) Component Unrealized gains on investment securities available-for-sale: $ — $ 65 $ 397 Gain on sales of securities,net — (23 ) (142 ) Provision for income taxes Total reclassifications for the period $ — $ 42 $ 255 Net income

Derivatives and Hedging Activ46

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of fair value and classification of derivative financial instruments on the consolidated balance sheets and the effect of the derivative financial instruments on the consolidated income statements	The table below presents the fair value and classification of the Company’s derivative financial instruments as of December 31, 2015 and 2014 . At December 31, 2015 At December 31, 2014 Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives (In Thousands) Total derivatives (interest-rate products) not designated as hedging instruments $ 8,656 $ 8,781 $ 2,676 $ 2,714 Changes in the fair value are recognized directly in the Company's unaudited consolidated statements of income and are included in other non-interest income in the consolidated statements of income. The table below presents the gain (loss) recognized in income due to changes in the fair value for the year ended December 31, 2015 and 2014 . Year Ended December 31, 2015 2014 (In Thousands) Gain (loss) recognized in income on derivatives $ 86 $ (8 )
Schedule of offsetting derivatives and amounts subject to master netting agreements not offset in the audited consolidated balance sheet	The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the consolidated balance sheet at the dates indicated. At December 31, 2015 Gross Gross Amounts Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Net Amount Financial Instruments Pledged Cash Collateral Pledged (In Thousands) Asset Derivatives $ 8,656 $ — $ 8,656 $ — $ — $ 8,656 Liability Derivatives $ 8,781 $ — $ 8,781 $ 9,873 $ 4,790 $ — At December 31, 2014 Gross Gross Amounts Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Net Amount Financial Instruments Pledged Cash Collateral Pledged (In Thousands) Asset Derivatives $ 2,676 $ — $ 2,676 $ — $ — $ 2,676 Liability Derivatives $ 2,714 $ — $ 2,714 $ 4,173 $ 1,180 $ —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of income tax expense	Income tax expense is comprised of the following amounts: Year Ended December 31, 2015 2014 2013 (In Thousands) Current provision: Federal * $ 23,340 $ 20,862 $ 13,968 State * 4,774 5,299 4,298 Total current provision 28,114 26,161 18,266 Deferred provision (benefit): Federal * 679 244 2,537 State * 560 (119 ) (139 ) Total deferred provision 1,239 125 2,398 Total provision for income taxes $ 29,353 $ 26,286 $ 20,664
Schedule of reconciliation of income tax expense	Total provision for income taxes differed from the amounts computed by applying the statutory U.S. federal income tax rate 35.0% to income before tax expense as a result of the following: Year Ended December 31, 2015 2014 2013 (In Thousands) Expected income tax expense at statutory federal tax rate * $ 28,603 $ 25,049 $ 20,492 State taxes, net of federal income tax benefit * 3,467 3,377 2,713 Bank-owned life insurance (367 ) (369 ) (383 ) Tax-exempt interest income (622 ) (341 ) (310 ) Income attributable to noncontrolling interest in subsidiary (994 ) (831 ) (768 ) Tax credit—premises and equipment — — (453 ) Tax credits from investments in affordable housing projects * (526 ) (667 ) (537 ) Other, net * (208 ) 68 (90 ) Total provision for income taxes * $ 29,353 $ 26,286 $ 20,664 Effective income tax rate * 35.9 % 36.7 % 35.3 % (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01.
Schedule of the tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities at the dates indicated are as follows: At December 31, 2015 2014 (In Thousands) Deferred tax assets: Allowance for credit losses $ 22,741 $ 21,770 Acquisition fair value adjustments 606 3,066 Unrealized loss on investment securities available-for-sale 1,577 1,086 Retirement and postretirement benefits 4,677 4,794 Deferred compensation 4,966 3,686 Net operating loss and contribution carryovers 1,335 1,614 Nonaccrual interest 352 814 Restricted stock and stock option plans 812 708 Accrued expenses 387 407 Alternative minimum tax credits 31 31 Other 103 63 Total gross deferred tax assets 37,587 38,039 Deferred tax liabilities: Identified intangible assets and goodwill 5,392 6,311 Depreciation 2,957 2,740 Deferred loan origination costs, net 2,218 930 Unrecognized gain relating to postretirement obligation 203 70 Other * — 301 Total gross deferred tax liabilities 10,770 10,352 Net deferred tax asset $ 26,817 $ 27,687 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01.

Regulatory Capital Requiremen48

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Schedule of the company's and the bank's actual and required capital amounts and ratios	The Company's and the Banks' actual and required capital amounts and ratios are as follows: Actual Minimum Required for Capital Adequacy Purposes Minimum Required To Be Considered "Well-Capitalized" Under Prompt Corrective Action Rules Amount Ratio Amount Ratio Amount Ratio (Dollars in Thousands) At December 31, 2015: Brookline Bancorp, Inc. Common equity Tier 1 capital ratio (1 ) $ 530,505 10.62 % $ 225,214 4.50 % N/A N/A Tier 1 leverage capital ratio (2 ) 545,035 9.37 % 231,930 4.00 % N/A N/A Tier 1 risk-based capital ratio (3 ) 545,035 10.91 % 300,019 6.00 % N/A N/A Total risk-based capital ratio (4 ) 676,709 13.54 % 401,013 8.00 % N/A N/A Brookline Bank Common equity Tier 1 capital ratio (1 ) $ 374,002 11.89 % $ 141,548 4.50 % $ 204,459 6.50 % Tier 1 leverage capital ratio (2 ) 380,003 10.78 % 141,003 4.00 % 176,254 5.00 % Tier 1 risk-based capital ratio (3 ) 380,003 12.08 % 188,743 6.00 % 251,658 8.00 % Total risk-based capital ratio (4 ) 417,270 13.27 % 251,557 8.00 % 314,446 10.00 % BankRI Common equity Tier 1 capital ratio (1 ) $ 171,967 10.63 % $ 72,799 4.50 % $ 105,154 6.50 % Tier 1 leverage capital ratio (2 ) 171,967 8.51 % 80,831 4.00 % 101,038 5.00 % Tier 1 risk-based capital ratio (3 ) 171,967 10.63 % 97,065 6.00 % 129,420 8.00 % Total risk-based capital ratio (4 ) 189,953 11.74 % 129,440 8.00 % 161,800 10.00 % First Ipswich Common equity Tier 1 capital ratio (1 ) $ 32,831 13.87 % $ 10,652 4.50 % $ 15,386 6.50 % Tier 1 leverage capital ratio (2 ) 32,831 9.26 % 14,182 4.00 % 17,727 5.00 % Tier 1 risk-based capital ratio (3 ) 32,831 13.87 % 14,202 6.00 % 18,936 8.00 % Total risk-based capital ratio (4 ) 35,617 15.05 % 18,933 8.00 % 23,666 10.00 % At December 31, 2014: Brookline Bancorp, Inc. Tier 1 leverage capital ratio (2 ) $ 504,964 9.01 % $ 224,179 4.00 % N/A N/A Tier 1 risk-based capital ratio (3 ) 504,964 10.55 % 191,456 4.00 % N/A N/A Total risk-based capital ratio (4 ) 633,421 13.24 % 382,732 8.00 % N/A N/A Brookline Bank Tier 1 leverage capital ratio (2 ) $ 336,513 9.60 % $ 140,214 4.00 % $ 175,267 5.00 % Tier 1 risk-based capital ratio (3 ) 336,513 10.72 % 125,565 4.00 % 188,347 6.00 % Total risk-based capital ratio (4 ) 373,312 11.90 % 250,966 8.00 % 313,708 10.00 % BankRI Tier 1 leverage capital ratio (2 ) $ 150,403 8.43 % $ 71,366 4.00 % $ 89,207 5.00 % Tier 1 risk-based capital ratio (3 ) 150,403 10.70 % 56,225 4.00 % 84,338 6.00 % Total risk-based capital ratio (4 ) 166,135 11.82 % 112,443 8.00 % 140,554 10.00 % First Ipswich Tier 1 leverage capital ratio (2 ) $ 29,962 9.27 % $ 12,929 4.00 % $ 16,161 5.00 % Tier 1 risk-based capital ratio (3 ) 29,962 12.40 % 9,665 4.00 % 14,498 6.00 % Total risk-based capital ratio (4 ) 32,375 13.40 % 19,328 8.00 % 24,160 10.00 % _______________________________________________________________________________ (1) Common equity tier 1 capital ratio is calculated by dividing common equity Tier 1 capital by risk-weighted assets. The ratio was established as part of the implementation of Basel III, effective January 1, 2015. (2) Tier 1 leverage capital ratio is calculated by dividing Tier 1 capital by average assets. (3) Tier 1 risk-based capital ratio is calculated by dividing Tier 1 capital by risk-weighted assets. (4) Total risk-based capital ratio is calculated by dividing total capital by risk-weighted assets.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of the components of net periodic postretirement benefit cost and other amounts recognized in other comprehensive income	The following table presents the components of net periodic postretirement benefit cost and other amounts recognized in other comprehensive income: Year Ended December 31, 2015 2014 2013 (In Thousands) Net periodic benefit expense: Service cost $ 55 $ 45 $ 61 Interest cost 49 47 47 Prior service credit (21 ) (21 ) (21 ) Actuarial gain (20 ) (40 ) (16 ) Net periodic benefit expense $ 63 $ 31 $ 71 Changes in postretirement benefit obligation recognized in other comprehensive income: Net actuarial loss (gain) $ 374 $ (477 ) $ 489 Prior service credit (21 ) (21 ) (21 ) Total pre-tax changes in postretirement benefit obligation recognized in other comprehensive income $ 353 $ (498 ) $ 468
Schedule of effect of 1% change in assumed health care cost trend rates	A 1% change in assumed health care cost trend rates would have the following effects: 1% Increase 1% Decrease (In Thousands) Effect on total service and interest cost components of net periodic postretirement benefit costs $ 26 $ (24 ) Effect on the accumulated postretirement benefit obligation 268 (208 )
Activity under recognition and retention plans	Activity under the recognition and retention plans was as follows: Restricted Stock Awards Outstanding Weighted Average Price per Share (Dollars in Thousands, Except Per Share Amounts) Recognition and Retention Plans: Outstanding at December 31, 2014 419,702 $ 9.17 Granted 247,790 11.36 Vested (126,193 ) 9.02 Forfeited / Canceled (55,264 ) 8.66 Outstanding at December 31, 2015 486,035 $ 10.37 Unrecognized compensation cost $ 3,045 Weighted average remaining recognition period (months) 28
Schedule of stock option activity	Activity under the option plans was as follows: Options Outstanding Weighted Average Exercise Price Per Share Aggregate Intrinsic Value Weighted Average Contractual Term (In Years) (Dollars in Thousands, Except Per Share Amounts) Employee Stock Options: Outstanding at December 31, 2014 227,345 $ 10.43 Granted — — Exercised — — Forfeited / Canceled — — Outstanding at December 31, 2015 227,345 $ 10.43 $ — 3.7 Exercisable at December 31, 2015 227,345 $ 10.43 $ — 3.7

Fair Value of Financial Instr50

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Fair value of assets and liabilities
Schedule of reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	The reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) is as follows for the year ended December 31, 2014: Year Ended December 31, 2015 2014 2013 (In Thousands) Investment securities available-for-sale, beginning of year $ — $ 1,775 $ 2,917 Investment security sales — (1,658 ) — Principal paydowns and other — — (1,150 ) Total realized losses included in other income — (242 ) — Total unrealized gains included in other comprehensive income — 125 8 Investment securities available-for-sale, end of year $ — $ — $ 1,775
Schedule of quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis	The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis at the dates indicated. Fair Value Valuation Technique At December 31, 2015 At December 31, 2014 (Dollars in Thousands) Collateral-dependent impaired loans and leases $ 12,137 $ 6,376 Appraisal of collateral (1) Other real estate owned $ 729 $ 953 Appraisal of collateral (1) (1) Fair value is generally determined through independent appraisals of the underlying collateral. The Company may also use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by Management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.
Summary of the carrying values and estimated fair values	Financial liabilities for which the fair value approximates carrying value include non-maturity deposits, short-term borrowings and accrued interest payable. Fair Value Measurements Carrying Value Estimated Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs (In Thousands) At December 31, 2015 Financial assets: Investment securities held-to-maturity: GSE $ 34,915 $ 34,819 $ — $ 34,819 $ — GSE MBSs 19,291 18,986 — 18,986 — Municipal Obligations 39,051 39,390 — 39,390 — Foreign Government Obligations 500 500 — — 500 Loans held-for-sale 13,383 13,383 — 13,383 — Loans and leases, net 4,938,801 4,857,060 — — 4,857,060 Financial liabilities: Certificates of deposit 1,087,872 1,091,906 — 1,091,906 — Borrowed funds 983,029 981,349 — 981,349 — At December 31, 2014 Financial assets: Investment securities held-to-maturity $ 500 $ 500 $ — $ — $ 500 Loans held-for-sale 1,537 1,537 — 1,537 — Loans and leases, net 4,768,948 4,753,605 — — 4,753,605 Financial liabilities: Certificates of deposit 946,708 949,320 — 949,320 — Borrowed funds 1,126,404 1,132,940 — 1,132,940 —
Recurring basis
Fair value of assets and liabilities
Schedule of assets and liabilities measured at fair value on a recurring and non-recurring basis	The following table set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at December 31, 2015 and 2014 : Carrying Value as of December 31, 2015 Level 1 Level 2 Level 3 Total (In Thousands) Assets: Investment securities available-for-sale: Debt securities: GSEs $ — $ 40,627 $ — $ 40,627 GSE CMOs — 193,816 — 193,816 GSE MBSs — 229,881 — 229,881 SBA commercial loan asset-backed securities — 147 — 147 Corporate debt obligations — 46,486 — 46,486 Trust preferred securities — 1,267 — 1,267 Total debt securities — 512,224 — 512,224 Marketable equity securities 977 — — 977 Total investment securities available-for-sale $ 977 $ 512,224 $ — $ 513,201 Interest-rate swaps $ — $ 8,656 $ — $ 8,656 Liabilities: Interest-rate swaps $ — $ 8,781 $ — $ 8,781 Carrying Value as of December 31, 2014 Level 1 Level 2 Level 3 Total (In Thousands) Assets: Investment securities available-for-sale: Debt securities: GSEs $ — $ 22,988 $ — $ 22,988 GSE CMOs — 234,169 — 234,169 GSE MBSs — 250,981 — 250,981 SBA commercial loan asset-backed securities — 203 — 203 Corporate debt obligations — 40,207 — 40,207 Trust preferred securities — 1,240 — 1,240 Total debt securities — 549,788 — 549,788 Marketable equity securities 973 — — 973 Total investment securities available-for-sale $ 973 $ 549,788 $ — $ 550,761 Interest-rate swaps $ — $ 2,676 $ — $ 2,676 Liabilities: Interest-rate swaps $ — $ 2,714 $ — $ 2,714
Nonrecurring basis
Fair value of assets and liabilities
Schedule of assets and liabilities measured at fair value on a recurring and non-recurring basis	Assets and liabilities measured at fair value on a non-recurring basis as of December 31, 2015 and 2014 are summarized below: Carrying Value as of December 31, 2015 Level 1 Level 2 Level 3 Total (In Thousands) Assets measured at fair value on a non-recurring basis: Collateral-dependent impaired loans and leases $ — $ — $ 12,137 $ 12,137 OREO — — 729 729 Repossessed assets — 614 — 614 Total assets measured at fair value on a non-recurring basis $ — $ 614 $ 12,866 $ 13,480 Carrying Value as of December 31, 2014 Level 1 Level 2 Level 3 Total (In Thousands) Assets measured at fair value on a non-recurring basis: Collateral-dependent impaired loans and leases $ — $ — $ 6,376 $ 6,376 OREO — — 953 953 Repossessed assets — 503 — 503 Total assets measured at fair value on a non-recurring basis $ — $ 503 $ 7,329 $ 7,832

Condensed Parent Company Fina51

Condensed Parent Company Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Balance Sheets	Balance Sheets At December 31, 2015 2014 (In Thousands) ASSETS Cash and due from banks $ 590 $ 3,293 Short-term investments 27,513 49,008 Total cash and cash equivalents 28,103 52,301 ESOP loan to Brookline Bank 1,752 2,002 Restricted equity securities 100 100 Premises and equipment, net 9,040 11,026 Investment in subsidiaries, at equity 681,504 628,531 Goodwill 35,267 35,267 Other assets * 2,631 4,366 Total assets * $ 758,397 $ 733,593 LIABILITIES AND STOCKHOLDERS' EQUITY Borrowed funds $ 82,936 $ 82,745 Deferred tax liability 435 721 Accrued expenses and other liabilities 7,541 8,309 Total liabilities 90,912 91,775 Stockholders' equity: Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued 757 757 Additional paid-in capital 616,899 617,475 Retained earnings, partially restricted * 109,675 84,860 Accumulated other comprehensive loss (2,476 ) (1,622 ) Treasury stock, at cost; 4,861,554 shares and 5,040,571 shares, respectively (56,208 ) (58,282 ) Unallocated common stock held by Employee Stock Ownership Plan ("ESOP"); 213,066 shares and 251,382 shares, respectively (1,162 ) (1,370 ) Total Brookline Bancorp, Inc. stockholders' equity * 667,485 641,818 Total liabilities and stockholders' equity * $ 758,397 $ 733,593 (*) Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
Statements of Income	Statements of Income Year Ended December 31, 2015 2014 2013 (In Thousands) Interest and dividend income: Dividend income from subsidiaries $ — $ 24,700 $ 30,000 Marketable and restricted equity securities 97 — — ESOP loan to Brookline Bank 162 183 205 Total interest and dividend income 259 24,883 30,205 Interest expense: Borrowed funds 5,063 1,746 442 Net interest income (4,804 ) 23,137 29,763 Non-interest income: Other 5 — — Total non-interest income 5 — — Non-interest expense: Compensation and employee benefits 205 2,357 2,305 Occupancy 22 38 16 Equipment and data processing 687 1,499 4,263 Directors' fees 688 656 590 Franchise taxes 113 252 223 Insurance 490 472 352 Professional services (1) 185 (113 ) 583 Other (2) (1,289 ) 751 2,040 Total non-interest expense 1,101 5,912 10,372 Income before income taxes (5,900 ) 17,225 19,391 Credit for income taxes (1,854 ) (2,705 ) (4,035 ) Income before equity in undistributed income of subsidiaries (4,046 ) 19,930 23,426 Equity in undistributed income of subsidiaries 53,828 23,358 12,589 Net income $ 49,782 $ 43,288 $ 36,015 (1) The Parent Company received a net benefit in 2014 from the intercompany allocation of expense that is eliminated in consolidation. (2) The Parent Company received a net benefit in 2015 from the intercompany allocation of expense that is eliminated in consolidation.
Statements of Cash Flows	Statements of Cash Flows Year Ended December 31, 2015 2014 2013 (In Thousands) Cash flows from operating activities: Net income attributable to parent company $ 49,782 $ 43,288 $ 36,015 Adjustments to reconcile net income to net cash provided from operating activities: Equity in undistributed income of subsidiaries (53,828 ) (23,358 ) (12,589 ) Depreciation of premises and equipment 2,728 2,563 1,810 Amortization of debt issuance costs 100 29 — Other operating activities, net 2,479 (30,822 ) 14,745 Net cash provided from (used for) operating activities 1,261 (8,300 ) 39,981 Cash flows from investing activities: Repayment of ESOP loan by Brookline Bank 250 250 250 Purchase of premises and equipment (742 ) (1,739 ) (5,458 ) Net cash used for investing activities (492 ) (1,489 ) (5,208 ) Cash flows from financing activities: Decrease in demand deposit, NOW, savings and money market accounts — — (41 ) Proceeds from issuance of subordinated notes — 73,495 — Repayment of subordinated debentures — — (3,000 ) Payment of dividends on common stock (24,967 ) (23,876 ) (23,841 ) Net cash (used for) provided from used for financing activities (24,967 ) 49,619 (26,882 ) Net (decrease) increase in cash and cash equivalents (24,198 ) 39,830 7,891 Cash and cash equivalents at beginning of year 52,301 12,471 4,580 Cash and cash equivalents at end of year $ 28,103 $ 52,301 $ 12,471

Quarterly Results of Operatio52

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of quarterly results of operations	2015 Quarters Fourth Third Second First (Dollars in Thousands Except Per Share Data) Interest and dividend income $ 58,448 $ 56,687 $ 55,166 $ 56,609 Interest expense 8,370 8,100 7,994 8,081 Net interest income 50,078 48,587 47,172 48,528 Provision for credit losses 1,520 1,755 1,913 2,263 Net interest income after provision for credit losses 48,558 46,832 45,259 46,265 Loan level derivative income 1,556 900 941 — Gain on sale of loans and leases held-for-sale 614 446 279 869 Other non-interest income 3,893 3,438 3,647 3,601 Amortization of identified intangible assets (724 ) (725 ) (724 ) (738 ) Other non-interest expense (31,605 ) (30,545 ) (29,728 ) (30,588 ) Income before provision for income taxes 22,292 20,346 19,674 19,409 Provision for income taxes 8,237 6,897 7,115 7,104 Net income 14,055 13,449 12,559 12,305 Less net income attributable to noncontrolling interest in subsidiary 728 561 694 602 Net income attributable to Brookline Bancorp, Inc. $ 13,327 $ 12,888 $ 11,865 $ 11,703 Earnings per share: Basic $ 0.19 $ 0.18 $ 0.17 $ 0.17 Diluted 0.19 0.18 0.17 0.17 Average common shares outstanding: Basic 70,177,382 70,129,056 70,049,829 70,036,090 Diluted 70,318,657 70,240,020 70,215,850 70,164,105 Common stock price: High $ 11.89 $ 11.66 $ 11.54 $ 10.05 Low 10.19 10.09 10.10 9.29 Dividends per share $ 0.090 $ 0.090 $ 0.090 $ 0.085 2014 Quarters Fourth Third Second First (Dollars in Thousands Except Per Share Data) Interest and dividend income $ 55,826 $ 54,616 $ 53,346 $ 54,694 Interest expense 8,250 7,292 6,912 6,960 Net interest income 47,576 47,324 46,434 47,734 Provision for credit losses 1,724 2,034 2,276 2,443 Net interest income after provision for credit losses 45,852 45,290 44,158 45,291 Loan level derivative income 562 322 62 — Gain on sales of investment securities, net 78 — (13 ) — Gain on sales of loans and leases held-for-sale 368 564 92 627 Other non-interest income 3,533 5,303 3,681 5,001 Amortization of identified intangible assets (827 ) (828 ) (827 ) (861 ) Other non-interest expense (31,628 ) (31,086 ) (30,388 ) (32,715 ) Income before provision for income taxes 17,938 19,565 16,765 17,343 Provision for income taxes 6,586 7,163 6,158 6,379 Net income 11,352 12,402 10,607 10,964 Less net income attributable to noncontrolling interest in subsidiary 477 662 476 422 Net income attributable to Brookline Bancorp, Inc. $ 10,875 $ 11,740 $ 10,131 $ 10,542 Earnings per share: Basic $ 0.16 $ 0.17 $ 0.15 $ 0.15 Diluted 0.16 0.17 0.14 0.15 Average common shares outstanding: Basic 70,024,495 69,989,909 69,886,576 69,875,473 Diluted 70,130,243 70,088,987 70,012,377 69,983,999 Common stock price: High $ 10.15 $ 9.51 $ 9.63 $ 9.70 Low 8.56 8.55 8.83 8.66 Dividends per share $ 0.085 $ 0.085 $ 0.085 $ 0.085

Basis of Presentation (Details)

Basis of Presentation (Details)	12 Months Ended
	Dec. 31, 2015USD ($)classbanksegment	Dec. 31, 2014USD ($)
Basis of Presentation
Number of full-service banking offices | bank	25
Percentage of insurance offered	100.00%
Impairment of restricted securities	$ 0	$ 0
Number of days past due, non-accrual status (in days)	90 days
Period after which a non-accrual loan is restructured (in months)	6 months
Total loans and leases	$ 4,995,540,000	4,822,607,000
BOLI, as percentage of capital plus reserves, maximum, individual carrier (as a percent)	10.00%
BOLI, as percentage of capital plus reserves, maximum, aggregate (as a percent)	25.00%
Number of reportable segments | segment	1
Taxi Medallion Portfolio
Basis of Presentation
Total loans and leases	$ 35,800,000
Commercial real estate loans
Basis of Presentation
Number of loan classes within specific portfolio | class	3
Total loans and leases	$ 2,664,394,000	2,467,801,000
Commercial loans
Basis of Presentation
Number of loan classes within specific portfolio | class	3
Total loans and leases	$ 1,374,296,000	1,167,094,000
Consumer loans
Basis of Presentation
Number of days past due, non-accrual status (in days)	90 days
Number of loan classes within specific portfolio | class	4
Total loans and leases	$ 943,172,000	$ 870,725,000
Eastern Funding LLC
Basis of Presentation
Percentage of ownership in subsidiary	84.50%
BankRI
Basis of Presentation
Number of full-service banking offices | bank	19
First Ipswich
Basis of Presentation
Number of full-service banking offices | bank	5
Minimum
Basis of Presentation
Term of operating lease	5 years
Maximum
Basis of Presentation
Term of operating lease	25 years

Acquisitions (Details)

Acquisitions (Details) shares in Millions, $ in Millions	Jan. 01, 2012USD ($)shares	Dec. 31, 2015bank
Acquisitions
Number of full-service banking offices | bank		25
Bancorp Rhode Island, Inc.
Acquisitions
Total consideration paid	$ 205.8
Shares of common stock issued as partial consideration for acquisition | shares	11
Par value	$ 0.1
Shares of common stock issued as partial consideration for acquisition	92.8
Cash consideration paid in acquisition	$ 113
Shares of common stock issued for each share of acquiree as consideration for acquisition	4.686
BankRI
Acquisitions
Number of full-service banking offices | bank		19

Cash and Short-Term Investmen55

Cash and Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Average amount required to be held with Federal Reserve Bank	$ 6,200	$ 7,400
Aggregate reserves	45,500	33,600
Short-term investments
FRB interest bearing reserve	34,575	19,789
FHLB overnight deposits	9,573	5,708
Federal funds sold	2,588	322
Other interest bearing deposits	0	11
Total short-term investments	$ 46,736	$ 25,830

Investment Securities (Details)

Investment Securities (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Investment securities available-for-sale
Amortized Cost	$ 517,601,000	$ 553,588,000
Gross Unrealized Gains	1,649,000	3,128,000
Gross Unrealized Losses	6,049,000	5,955,000
Estimated Fair Value	513,201,000	550,761,000
Investment securities held-to-maturity
Amortized Cost	93,757,000	500,000
Gross Unrealized Gains	373,000	0
Gross Unrealized Losses	435,000	0
Estimated Fair Value	93,695,000	500,000
Investment securities available-for-sale	513,201,000	550,761,000
Net unrealized gain (loss)	(4,400,000)	(2,800,000)
Total, estimated fair value	$ 368,631,000	$ 335,683,000
Percentage of securities in unrealized loss positions, available-for-sale securities	71.80%	60.90%
Net unrealized gain (loss), held-to-maturity securities	$ 62,000	$ 0
Gross unrealized losses, fair value, held-to-maturity securities	$ 52,300,000
Percentage of securities in unrealized loss positions, held-to-maturity securities	55.80%
Available for sale securities pledged as collateral	$ 486,400,000	473,100,000
GSEs
Investment securities available-for-sale
Amortized Cost	40,658,000	22,929,000
Gross Unrealized Gains	141,000	88,000
Gross Unrealized Losses	172,000	29,000
Estimated Fair Value	40,627,000	22,988,000
Investment securities held-to-maturity
Amortized Cost	34,915,000
Gross Unrealized Gains	9,000
Gross Unrealized Losses	105,000
Estimated Fair Value	34,819,000
Investment securities available-for-sale	40,627,000	22,988,000
Gross unrealized losses, fair value, held-to-maturity securities	34,800,000
GSE CMOs
Investment securities available-for-sale
Amortized Cost	198,000,000	238,910,000
Gross Unrealized Gains	45,000	80,000
Gross Unrealized Losses	4,229,000	4,821,000
Estimated Fair Value	193,816,000	234,169,000
Investment securities held-to-maturity
Investment securities available-for-sale	193,816,000	234,169,000
GSE MBSs
Investment securities available-for-sale
Amortized Cost	230,213,000	249,329,000
Gross Unrealized Gains	1,098,000	2,531,000
Gross Unrealized Losses	1,430,000	879,000
Estimated Fair Value	229,881,000	250,981,000
Investment securities held-to-maturity
Amortized Cost	19,291,000
Gross Unrealized Gains	0
Gross Unrealized Losses	305,000
Estimated Fair Value	18,986,000
Investment securities available-for-sale	229,881,000	250,981,000
Gross unrealized losses, fair value, held-to-maturity securities	19,000,000
SBA commercial loan asset-backed securities
Investment securities available-for-sale
Amortized Cost	148,000	205,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,000	2,000
Estimated Fair Value	147,000	203,000
Investment securities held-to-maturity
Investment securities available-for-sale	147,000	203,000
Corporate debt obligations
Investment securities available-for-sale
Amortized Cost	46,160,000	39,805,000
Gross Unrealized Gains	344,000	403,000
Gross Unrealized Losses	18,000	1,000
Estimated Fair Value	46,486,000	40,207,000
Investment securities held-to-maturity
Investment securities available-for-sale	46,486,000	40,207,000
Net unrealized gain (loss)	300,000	400,000
Trust preferred securities
Investment securities available-for-sale
Amortized Cost	1,466,000	1,463,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	199,000	223,000
Estimated Fair Value	1,267,000	1,240,000
Investment securities held-to-maturity
Investment securities available-for-sale	1,267,000	1,240,000
Net unrealized gain (loss)	(200,000)	(200,000)
Debt Securities
Investment securities available-for-sale
Amortized Cost	516,645,000	552,641,000
Gross Unrealized Gains	1,628,000	3,102,000
Gross Unrealized Losses	6,049,000	5,955,000
Estimated Fair Value	512,224,000	549,788,000
Investment securities held-to-maturity
Investment securities available-for-sale	512,224,000	549,788,000
Marketable equity securities
Investment securities available-for-sale
Amortized Cost	956,000	947,000
Gross Unrealized Gains	21,000	26,000
Gross Unrealized Losses	0	0
Estimated Fair Value	977,000	973,000
Investment securities held-to-maturity
Investment securities available-for-sale	977,000	973,000
Municipal obligations
Investment securities held-to-maturity
Amortized Cost	39,051,000
Gross Unrealized Gains	364,000
Gross Unrealized Losses	25,000
Estimated Fair Value	39,390,000
Gross unrealized losses, fair value, held-to-maturity securities	39,400,000
Foreign government securities
Investment securities held-to-maturity
Amortized Cost	500,000	500,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	500,000	500,000
Gross unrealized losses, fair value, held-to-maturity securities	$ 500,000	$ 500,000

Investment Securities (Details

Investment Securities (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investment securities available-for-sale
Less than twelve months, estimated fair value		$ 104,357
Less than twelve months, unrealized losses		293
Twelve months or longer, estimated fair value		231,326
Twelve months or longer, unrealized losses		5,662
Estimated Fair Value	$ 368,631	335,683
Total, unrealized losses		5,955
Investment securities held-to-maturity
Total, estimated fair value	52,300
GSEs
Investment securities available-for-sale
Less than twelve months, estimated fair value	19,633	11,086
Less than twelve months, unrealized losses	172	29
Twelve months or longer, estimated fair value	0	0
Twelve months or longer, unrealized losses	0	0
Estimated Fair Value	19,633	11,086
Total, unrealized losses	172	29
Investment securities held-to-maturity
Less than twelve months, estimated fair value	25,837
Less than twelve months, unrealized losses	105
Twelve months or longer, estimated fair value	0
Twelve months or longer, unrealized losses	0
Total, estimated fair value	25,837
Total, unrealized losses	105
GSE CMOs
Investment securities available-for-sale
Less than twelve months, estimated fair value	89,680	39,095
Less than twelve months, unrealized losses	1,294	179
Twelve months or longer, estimated fair value	100,473	190,345
Twelve months or longer, unrealized losses	2,935	4,642
Estimated Fair Value	190,153	229,440
Total, unrealized losses	4,229	4,821
GSE MBSs
Investment securities available-for-sale
Less than twelve months, estimated fair value	133,779	50,099
Less than twelve months, unrealized losses	845	84
Twelve months or longer, estimated fair value	16,968	39,555
Twelve months or longer, unrealized losses	585	795
Estimated Fair Value	150,747	89,654
Total, unrealized losses	1,430	879
Investment securities held-to-maturity
Less than twelve months, estimated fair value	18,834
Less than twelve months, unrealized losses	305
Twelve months or longer, estimated fair value	0
Twelve months or longer, unrealized losses	0
Total, estimated fair value	18,834
Total, unrealized losses	305
SBA commercial loan asset-backed securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	0	8
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	139	186
Twelve months or longer, unrealized losses	1	2
Estimated Fair Value	139	194
Total, unrealized losses	1	2
Corporate debt obligations
Investment securities available-for-sale
Less than twelve months, estimated fair value	6,181	4,069
Less than twelve months, unrealized losses	18	1
Twelve months or longer, estimated fair value	0	0
Twelve months or longer, unrealized losses	0	0
Estimated Fair Value	6,181	4,069
Total, unrealized losses	18	1
Trust preferred securities and pools
Investment securities available-for-sale
Less than twelve months, estimated fair value	0	0
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	1,267	1,240
Twelve months or longer, unrealized losses	199	223
Estimated Fair Value	1,267	1,240
Total, unrealized losses	199	$ 223
Municipal obligations
Investment securities held-to-maturity
Less than twelve months, estimated fair value	7,629
Less than twelve months, unrealized losses	25
Twelve months or longer, estimated fair value	0
Twelve months or longer, unrealized losses	0
Total, estimated fair value	7,629
Total, unrealized losses	25
Debt Securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	249,273
Less than twelve months, unrealized losses	2,329
Twelve months or longer, estimated fair value	118,847
Twelve months or longer, unrealized losses	3,720
Estimated Fair Value	368,120
Total, unrealized losses	6,049
Investment securities held-to-maturity
Less than twelve months, estimated fair value	52,300
Less than twelve months, unrealized losses	435
Twelve months or longer, estimated fair value	0
Twelve months or longer, unrealized losses	0
Total, estimated fair value	52,300
Total, unrealized losses	435
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Less Than Twelve Months, Estimated Fair Value	301,573
Less Than Twelve Months, Unrealized Losses	2,764
Twelve Months or Longer, Estimated Fair Value	118,847
Twelve Months or Longer, Unrealized Losses	3,720
Total, Estimated Fair Value	420,420
Total, Unrealized Losses	$ 6,484

Investment Securities (Detail58

Investment Securities (Details 3)	12 Months Ended
	Dec. 31, 2015USD ($)security	Dec. 31, 2014USD ($)security	Dec. 31, 2013USD ($)
Investment Securities
Percentage of securities in unrealized loss positions, held-to-maturity securities	55.80%
Gross Unrealized Losses	$ 435,000	$ 0
Estimated Fair Value	513,201,000	550,761,000
Purchases of securities available-for-sale	63,615,000	139,866,000	$ 171,231,000
Net unrealized gain (loss)	(4,400,000)	(2,800,000)
Fair value	52,300,000
Amortized Cost	93,757,000	$ 500,000
Number of securities in an unrealized loss position | security		0
Investment securities held to maturity, fair value	93,695,000	$ 500,000
Net unrealized gain (loss), held-to-maturity securities	(62,000)	0
Purchases of investment securities held-to-maturity	102,847,000	500,000	$ 0
US Government Sponsored Enterprises Debt Securities Excluding Specified Securities
Investment Securities
Estimated Fair Value	21,800,000	26,200,000
GSEs
Investment Securities
Gross Unrealized Losses	105,000
Estimated Fair Value	$ 40,627,000	$ 22,988,000
Number of securities in unrealized loss positions | security	7	4
Number of securities | security	13	8
Purchases of securities available-for-sale	$ 24,900,000	$ 21,000,000
Fair value	34,800,000
Amortized Cost	34,915,000
Investment securities held to maturity, fair value	34,819,000
Purchases of investment securities held-to-maturity	42,400,000
GSE mortgage-related securities
Investment Securities
Estimated Fair Value	$ 423,700,000	$ 485,200,000
Number of securities in unrealized loss positions | security	101	79
Number of securities | security	249	250
Purchases of securities available-for-sale	$ 29,500,000	$ 106,900,000
Net unrealized gain (loss)	(4,500,000)	(3,100,000)
GSE MBSs
Investment Securities
Gross Unrealized Losses	305,000
Estimated Fair Value	229,881,000	250,981,000
Fair value	19,000,000
Amortized Cost	$ 19,291,000
Number of securities in an unrealized loss position | security	16
Number of securities | security	22
Investment securities held to maturity, fair value	$ 18,986,000
Purchases of investment securities held-to-maturity	21,300,000
SBA commercial loan asset-backed securities
Investment Securities
Estimated Fair Value	$ 147,000	$ 203,000
Number of securities in unrealized loss positions | security	6	7
Number of securities | security	7	8
Corporate debt obligations
Investment Securities
Estimated Fair Value	$ 46,486,000	$ 40,207,000
Number of securities in unrealized loss positions | security	2	1
Number of securities | security	15	13
Purchases of securities available-for-sale	$ 9,300,000	$ 12,000,000
Net unrealized gain (loss)	300,000	400,000
Trust preferred securities
Investment Securities
Estimated Fair Value	$ 1,267,000	$ 1,240,000
Number of securities in unrealized loss positions | security	2	2
Number of securities | security	2	2
Net unrealized gain (loss)	$ (200,000)	$ (200,000)
Marketable equity securities
Investment Securities
Estimated Fair Value	$ 977,000	$ 973,000
Number of securities in unrealized loss positions | security	0	0
Number of securities | security	2	4
Municipal obligations
Investment Securities
Gross Unrealized Losses	$ 25,000
Purchases of securities available-for-sale	39,200,000	$ 0
Fair value	39,400,000
Amortized Cost	$ 39,051,000
Number of securities in an unrealized loss position | security	15
Number of securities | security	72
Investment securities held to maturity, fair value	$ 39,390,000
Foreign Government Obligations
Investment Securities
Gross Unrealized Losses	0	0
Fair value	500,000	500,000
Amortized Cost	$ 500,000	$ 500,000
Number of securities | security	1	1
Investment securities held to maturity, fair value	$ 500,000	$ 500,000

Investment Securities (Detail59

Investment Securities (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Available for Sale, Amortized Cost
Within 1 year	$ 2,999	$ 3,057
After 1 year through 5 years	59,729	55,631
After 5 years through 10 years	100,658	103,268
Over 10 years	353,259	390,685
Total	516,645	552,641
Available for Sale, Estimated Fair Value
Within 1 year	3,003	3,081
After 1 year through 5 years	60,249	56,586
After 5 years through 10 years	100,833	104,208
Over 10 years	348,139	385,913
Total	$ 512,224	$ 549,788
Available for Sale, Weighted Average Rate
Within 1 year (as a percent)	2.09%	3.00%
After 1 year through 5 years (as a percent)	2.32%	2.48%
After 5 years through 10 years (as a percent)	2.05%	2.00%
Over 10 years (as a percent)	1.97%	1.91%
Total (as a percent)	2.03%	1.99%
Held-to-Maturity, Amortized Cost
Within 1 year	$ 651	$ 0
After 1 year through 5 years	23,888	500
After 5 years through 10 years	50,078	0
Over 10 years	19,140	0
Total	93,757	500
Held-to-Maturity, Estimated Fair Value
Within 1 year	651	0
After 1 year through 5 years	23,866	500
After 5 years through 10 years	50,344	0
Over 10 years	18,834	0
Total	$ 93,695	$ 500
Held-to-Maturity, Weighted Average Rate
Within 1 year (as a percent)	1.00%	0.00%
After 1 year through 5 years (as a percent)	1.52%	1.30%
After 5 years through 10 years (as a percent)	2.00%	0.00%
Over 10 years (as a percent)	1.82%	0.00%
Total (as a percent)	1.83%	0.00%
Estimated fair value of debt securities have right to call or prepay the obligations	$ 48,500	$ 16,100
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of after one year through five years	15,500
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities after five years through ten years	31,800	9,900
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of which is after 10 years	$ 1,300	1,200
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of less than one year		$ 5,000

Investment Securities (Detail60

Investment Securities (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales	$ 0	$ 5,485	$ 1,210
Gross gains from sales	0	380	626
Gross losses from sales	0	315	229
Gain on sales of securities, net	0	65	397
Sales of debt securities
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales	0	5,084	1,210
Sales of marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales	$ 0	$ 401	$ 0

Restricted Equity Securities (D

Restricted Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Restricted equity securities
Restricted equity securities	$ 66,117		$ 66,117	$ 74,804
FHLBB stock
Restricted equity securities
Restricted equity securities	$ 48,890		$ 48,890	58,326
Dividend rate (as a percent)	3.32%	1.74%	2.54%
Federal Reserve Bank of Boston stock
Restricted equity securities
Restricted equity securities	$ 16,752		$ 16,752	16,003
Other restricted equity securities
Restricted equity securities
Restricted equity securities	$ 475		$ 475	$ 475

Loans and Leases (Details)

Loans and Leases (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 4,572,888,000				$ 4,231,953,000				$ 4,572,888,000	$ 4,231,953,000
Originated, Weighted Average Coupon (as a percent)									4.38%	4.43%
Acquired loans	422,652,000				590,654,000				$ 422,652,000	$ 590,654,000
Acquired, Weighted Average Coupon (as a percent)									4.18%	4.19%
Total loans and leases	4,995,540,000				4,822,607,000				$ 4,995,540,000	$ 4,822,607,000
Total, Weighted Average Coupon (as a percent)									4.36%	4.40%
Unamortized deferred loan origination fees and costs	12,800,000				15,000,000				$ 12,800,000	$ 15,000,000
Percentage of loans to aggregate outstanding amount in the greater New York/New Jersey Metropolitan area and northeastern states									32.80%	35.90%
Percentage of loans to aggregate outstanding amount in Other areas of the United States									67.20%	64.10%
Proceeds from sales of loans and leases held-for-sale, net									$ 64,398,000	$ 34,717,000	$ 56,326,000
Gain (loss) on sales of loans and leases held-for-sale	614,000	$ 446,000	$ 279,000	$ 869,000	368,000	$ 564,000	$ 92,000	$ 627,000	2,208,000	1,651,000	$ 794,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,875,592,000				1,680,082,000				1,875,592,000	1,680,082,000
Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	658,480,000				639,706,000				658,480,000	639,706,000
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	130,322,000				148,013,000				130,322,000	148,013,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	592,531,000				514,077,000				592,531,000	514,077,000
Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	721,890,000				601,424,000				721,890,000	601,424,000
Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	59,875,000				51,593,000				59,875,000	51,593,000
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	616,449,000				571,920,000				616,449,000	571,920,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	314,553,000				287,058,000				314,553,000	287,058,000
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	12,170,000				11,747,000				12,170,000	11,747,000
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	2,435,155,000				2,147,909,000				$ 2,435,155,000	$ 2,147,909,000
Originated, Weighted Average Coupon (as a percent)									3.96%	4.13%
Acquired loans	229,239,000				319,892,000				$ 229,239,000	$ 319,892,000
Acquired, Weighted Average Coupon (as a percent)									4.19%	4.34%
Total loans and leases	2,664,394,000				2,467,801,000				$ 2,664,394,000	$ 2,467,801,000
Total, Weighted Average Coupon (as a percent)									3.98%	4.16%
Commercial real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	1,684,548,000				1,425,621,000				$ 1,684,548,000	$ 1,425,621,000
Originated, Weighted Average Coupon (as a percent)									4.00%	4.18%
Acquired loans	191,044,000				254,461,000				$ 191,044,000	$ 254,461,000
Acquired, Weighted Average Coupon (as a percent)									4.15%	4.29%
Total loans and leases	1,875,592,000				1,680,082,000				$ 1,875,592,000	$ 1,680,082,000
Total, Weighted Average Coupon (as a percent)									4.02%	4.20%
Commercial real estate loans | Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	620,865,000				576,214,000				$ 620,865,000	$ 576,214,000
Originated, Weighted Average Coupon (as a percent)									3.92%	4.11%
Acquired loans	37,615,000				63,492,000				$ 37,615,000	$ 63,492,000
Acquired, Weighted Average Coupon (as a percent)									4.35%	4.50%
Total loans and leases	658,480,000				639,706,000				$ 658,480,000	$ 639,706,000
Total, Weighted Average Coupon (as a percent)									3.94%	4.15%
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	129,742,000				146,074,000				$ 129,742,000	$ 146,074,000
Originated, Weighted Average Coupon (as a percent)									3.60%	3.79%
Acquired loans	580,000				1,939,000				$ 580,000	$ 1,939,000
Acquired, Weighted Average Coupon (as a percent)									5.08%	5.50%
Total loans and leases	130,322,000				148,013,000				$ 130,322,000	$ 148,013,000
Total, Weighted Average Coupon (as a percent)									3.61%	3.81%
Commercial loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	1,349,462,000				1,101,819,000				$ 1,349,462,000	$ 1,101,819,000
Originated, Weighted Average Coupon (as a percent)									5.59%	5.53%
Acquired loans	24,834,000				65,275,000				$ 24,834,000	$ 65,275,000
Acquired, Weighted Average Coupon (as a percent)									5.83%	4.58%
Total loans and leases	1,374,296,000				1,167,094,000				$ 1,374,296,000	$ 1,167,094,000
Total, Weighted Average Coupon (as a percent)									5.59%	5.48%
Commercial loans and leases | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	576,599,000				462,730,000				$ 576,599,000	$ 462,730,000
Originated, Weighted Average Coupon (as a percent)									3.90%	3.88%
Acquired loans	15,932,000				51,347,000				$ 15,932,000	$ 51,347,000
Acquired, Weighted Average Coupon (as a percent)									5.65%	4.14%
Total loans and leases	592,531,000				514,077,000				$ 592,531,000	$ 514,077,000
Total, Weighted Average Coupon (as a percent)									3.95%	3.91%
Commercial loans and leases | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	712,988,000				587,496,000				$ 712,988,000	$ 587,496,000
Originated, Weighted Average Coupon (as a percent)									7.05%	6.92%
Acquired loans	8,902,000				13,928,000				$ 8,902,000	$ 13,928,000
Acquired, Weighted Average Coupon (as a percent)									6.14%	6.22%
Total loans and leases	721,890,000				601,424,000				$ 721,890,000	$ 601,424,000
Total, Weighted Average Coupon (as a percent)									7.04%	6.90%
Commercial loans and leases | Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	59,875,000				51,593,000				$ 59,875,000	$ 51,593,000
Originated, Weighted Average Coupon (as a percent)									4.50%	4.60%
Acquired loans	0				0				$ 0	$ 0
Acquired, Weighted Average Coupon (as a percent)									0.00%	0.00%
Total loans and leases	59,875,000				51,593,000				$ 59,875,000	$ 51,593,000
Total, Weighted Average Coupon (as a percent)									4.50%	4.60%
Indirect automobile loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	13,678,000				316,987,000				$ 13,678,000	$ 316,987,000
Originated, Weighted Average Coupon (as a percent)									5.53%	4.47%
Acquired loans	0				0				$ 0	$ 0
Acquired, Weighted Average Coupon (as a percent)									0.00%	0.00%
Total loans and leases	13,678,000				316,987,000				$ 13,678,000	$ 316,987,000
Total, Weighted Average Coupon (as a percent)									5.53%	4.47%
Percent of loan portfolio sold (over)				90.00%
Proceeds from sales of loans and leases held-for-sale, net				$ 255,200,000
Gain (loss) on sales of loans and leases held-for-sale				$ 11,800
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	774,593,000				665,238,000				$ 774,593,000	$ 665,238,000
Originated, Weighted Average Coupon (as a percent)									3.57%	3.56%
Acquired loans	168,579,000				205,487,000				$ 168,579,000	$ 205,487,000
Acquired, Weighted Average Coupon (as a percent)									3.93%	3.82%
Total loans and leases	943,172,000				870,725,000				$ 943,172,000	$ 870,725,000
Total, Weighted Average Coupon (as a percent)									3.63%	3.62%
Consumer loans | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	527,846,000				472,078,000				$ 527,846,000	$ 472,078,000
Originated, Weighted Average Coupon (as a percent)									3.64%	3.60%
Acquired loans	88,603,000				99,842,000				$ 88,603,000	$ 99,842,000
Acquired, Weighted Average Coupon (as a percent)									3.85%	3.77%
Total loans and leases	616,449,000				571,920,000				$ 616,449,000	$ 571,920,000
Total, Weighted Average Coupon (as a percent)									3.67%	3.63%
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	234,708,000				181,580,000				$ 234,708,000	$ 181,580,000
Originated, Weighted Average Coupon (as a percent)									3.35%	3.35%
Acquired loans	79,845,000				105,478,000				$ 79,845,000	$ 105,478,000
Acquired, Weighted Average Coupon (as a percent)									3.99%	3.85%
Total loans and leases	314,553,000				287,058,000				$ 314,553,000	$ 287,058,000
Total, Weighted Average Coupon (as a percent)									3.51%	3.53%
Consumer loans | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	12,039,000				11,580,000				$ 12,039,000	$ 11,580,000
Originated, Weighted Average Coupon (as a percent)									4.77%	5.13%
Acquired loans	131,000				167,000				$ 131,000	$ 167,000
Acquired, Weighted Average Coupon (as a percent)									17.40%	16.35%
Total loans and leases	$ 12,170,000				$ 11,747,000				$ 12,170,000	$ 11,747,000
Total, Weighted Average Coupon (as a percent)									4.91%	5.29%

Loans and Leases (Details 2)

Loans and Leases (Details 2) - Acquired - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summarized activity in accretable yield for the acquired loan portfolio
Balance at beginning of year	$ 32,044	$ 45,789	$ 57,812
Accretion	(10,467)	(15,805)	(20,500)
Reclassification from nonaccretable difference for loans with improved cash flows	4,483	2,060	8,477
Changes in expected cash flows that do not affect nonaccretable difference	(5,264)	0	0
Balance at end of year	20,796	32,044	$ 45,789
Aggregate remaining nonaccretable difference (representing both principal and interest) applicable to acquired loans	$ 2,900	$ 3,600

Loans and Leases (Details 3)

Loans and Leases (Details 3) - Directors, executive officers and their affiliates - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Change in the total amounts of loans and advances, all of which were performing
Balance at beginning of year	$ 8,574	$ 4,783
New loans granted during the year	9,931	2,375
Loans reclassified as insider loans	21,481	0
Advances on lines of credit	840	1,787
Repayments	(1,344)	(182)
Loan no longer classified as an insider loan	(2,107)	(189)
Balance at end of year	37,375	8,574
Unfunded commitments on extensions of credit	$ 14,800	$ 11,700

Loans and Leases (Details 4)

Loans and Leases (Details 4) - USD ($) $ in Billions	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Loans and leases pledged as collateral	$ 1.8	$ 1.6

Allowance for Loan and Lease 66

Allowance for Loan and Lease Losses (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)class	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)class	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Changes in allowance for loan losses
Balance at the beginning of the period				$ 53,659,000				$ 48,473,000	$ 53,659,000	$ 48,473,000	$ 41,152,000
Charge-offs									(6,554,000)	(4,450,000)	(4,788,000)
Recoveries									2,211,000	1,397,000	1,434,000
Provision (credit) for loan and lease losses									7,423,000	8,239,000	10,675,000
Balance at the end of the period	$ 56,739,000				$ 53,659,000				56,739,000	53,659,000	48,473,000
Unfunded credit commitments liability included in other liabilities	1,300,000				1,300,000				1,300,000	1,300,000	1,000,000
Unfunded credit commitments liability charged off									0	0	0
Provisions for credit losses
Total provision for loan and lease losses									7,423,000	8,239,000	10,675,000
Unfunded credit commitments									28,000	238,000	254,000
Total provision for credit losses	1,520,000	$ 1,755,000	$ 1,913,000	2,263,000	1,724,000	$ 2,034,000	$ 2,276,000	2,443,000	7,451,000	8,477,000	10,929,000
Total loans and leases	4,995,540,000				4,822,607,000				4,995,540,000	4,822,607,000
General allowance for loan and lease losses	53,100,000				50,100,000				53,100,000	50,100,000
Increase in general portion of the allowance for loan and lease losses									3,000,000
Specific allowance for loan and lease losses	3,600,000				1,200,000				3,600,000	1,200,000
Increase (decrease) in specific portion of the allowance for loan and lease losses									2,500,000
Unallocated allowance for loan and lease losses	0				2,400,000				0	2,400,000
Taxi Medallion Portfolio
Provisions for credit losses
Total loans and leases	35,800,000								35,800,000
Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									7,355,000	6,078,000	7,901,000
Provisions for credit losses
Total provision for loan and lease losses									7,355,000	6,078,000	7,901,000
Unfunded credit commitments									28,000	238,000	254,000
Total provision for credit losses									7,383,000	6,316,000	8,155,000
Total loans and leases	4,572,888,000				4,231,953,000				4,572,888,000	4,231,953,000
Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									68,000	2,161,000	2,774,000
Provisions for credit losses
Total provision for loan and lease losses									68,000	2,161,000	2,774,000
Unfunded credit commitments									0	0	0
Total provision for credit losses									68,000	2,161,000	2,774,000
Total loans and leases	422,652,000				590,654,000				422,652,000	590,654,000
Commercial Real Estate
Changes in allowance for loan losses
Balance at the beginning of the period				29,594,000				23,022,000	29,594,000	23,022,000	20,018,000
Charge-offs									(550,000)	(130,000)	(88,000)
Recoveries									0	4,000	13,000
Provision (credit) for loan and lease losses									1,107,000	6,698,000	3,079,000
Balance at the end of the period	30,151,000				29,594,000				30,151,000	29,594,000	23,022,000
Provisions for credit losses
Total provision for loan and lease losses									1,107,000	6,698,000	3,079,000
Total loans and leases	$ 2,664,394,000				2,467,801,000				$ 2,664,394,000	2,467,801,000
Number of loan classes within specific portfolio | class	3								3
Commercial Real Estate | Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									$ 1,459,000	5,009,000	2,563,000
Provisions for credit losses
Total provision for loan and lease losses									1,459,000	5,009,000	2,563,000
Total loans and leases	$ 2,435,155,000				2,147,909,000				2,435,155,000	2,147,909,000
Commercial Real Estate | Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									(352,000)	1,689,000	516,000
Provisions for credit losses
Total provision for loan and lease losses									(352,000)	1,689,000	516,000
Total loans and leases	229,239,000				319,892,000				229,239,000	319,892,000
Commercial
Changes in allowance for loan losses
Balance at the beginning of the period				15,957,000				15,220,000	15,957,000	15,220,000	10,655,000
Charge-offs									(3,634,000)	(2,507,000)	(2,077,000)
Recoveries									667,000	801,000	657,000
Provision (credit) for loan and lease losses									9,028,000	2,443,000	5,985,000
Balance at the end of the period	22,018,000				15,957,000				22,018,000	15,957,000	15,220,000
Provisions for credit losses
Total provision for loan and lease losses									9,028,000	2,443,000	5,985,000
Total loans and leases	$ 1,374,296,000				1,167,094,000				$ 1,374,296,000	1,167,094,000
Number of loan classes within specific portfolio | class	3								3
Commercial | Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									$ 9,077,000	2,030,000	4,917,000
Provisions for credit losses
Total provision for loan and lease losses									9,077,000	2,030,000	4,917,000
Total loans and leases	$ 1,349,462,000				1,101,819,000				1,349,462,000	1,101,819,000
Commercial | Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									(49,000)	413,000	1,068,000
Provisions for credit losses
Total provision for loan and lease losses									(49,000)	413,000	1,068,000
Total loans and leases	24,834,000				65,275,000				24,834,000	65,275,000
Indirect automobile loans
Changes in allowance for loan losses
Balance at the beginning of the period				2,331,000				3,924,000	2,331,000	3,924,000	5,304,000
Charge-offs									(1,788,000)	(1,163,000)	(1,714,000)
Recoveries									1,442,000	434,000	501,000
Provision (credit) for loan and lease losses									(1,716,000)	(864,000)	(167,000)
Balance at the end of the period	269,000				2,331,000				269,000	2,331,000	3,924,000
Provisions for credit losses
Total provision for loan and lease losses									(1,716,000)	(864,000)	(167,000)
Total loans and leases	13,678,000				316,987,000				13,678,000	316,987,000
Release in general allowance resulting from the sale of portfolio									1,900,000
Indirect automobile loans | Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									(1,716,000)	(864,000)	(167,000)
Provisions for credit losses
Total provision for loan and lease losses									(1,716,000)	(864,000)	(167,000)
Total loans and leases	13,678,000				316,987,000				13,678,000	316,987,000
Indirect automobile loans | Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									0	0	0
Provisions for credit losses
Total provision for loan and lease losses									0	0	0
Total loans and leases	0				0				0	0
Consumer
Changes in allowance for loan losses
Balance at the beginning of the period				3,359,000				3,375,000	3,359,000	3,375,000	2,545,000
Charge-offs									(582,000)	(650,000)	(909,000)
Recoveries									102,000	158,000	263,000
Provision (credit) for loan and lease losses									1,422,000	476,000	1,476,000
Balance at the end of the period	4,301,000				3,359,000				4,301,000	3,359,000	3,375,000
Provisions for credit losses
Total provision for loan and lease losses									1,422,000	476,000	1,476,000
Total loans and leases	$ 943,172,000				870,725,000				$ 943,172,000	870,725,000
Number of loan classes within specific portfolio | class	4								4
Consumer | Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									$ 953,000	417,000	286,000
Provisions for credit losses
Total provision for loan and lease losses									953,000	417,000	286,000
Total loans and leases	$ 774,593,000				665,238,000				774,593,000	665,238,000
Consumer | Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									469,000	59,000	1,190,000
Provisions for credit losses
Total provision for loan and lease losses									469,000	59,000	1,190,000
Total loans and leases	168,579,000				205,487,000				168,579,000	205,487,000
Unallocated
Changes in allowance for loan losses
Balance at the beginning of the period				$ 2,418,000				$ 2,932,000	2,418,000	2,932,000	2,630,000
Charge-offs									0	0	0
Recoveries									0	0	0
Provision (credit) for loan and lease losses									(2,418,000)	(514,000)	302,000
Balance at the end of the period	0				2,418,000				0	2,418,000	2,932,000
Provisions for credit losses
Total provision for loan and lease losses									(2,418,000)	(514,000)	302,000
Total loans and leases	0				0				0	0
Unallocated | Originated
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									(2,418,000)	(514,000)	302,000
Provisions for credit losses
Total provision for loan and lease losses									(2,418,000)	(514,000)	302,000
Total loans and leases	0				0				0	0
Unallocated | Acquired
Changes in allowance for loan losses
Provision (credit) for loan and lease losses									0	0	0
Provisions for credit losses
Total provision for loan and lease losses									0	0	$ 0
Total loans and leases	$ 0				$ 0				$ 0	$ 0

Allowance for Loan and Lease 67

Allowance for Loan and Lease Losses (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Credit Quality Information
Recorded investment	$ 4,995,540	$ 4,822,607
Originated
Credit Quality Information
Recorded investment	4,572,888	4,231,953
Acquired
Credit Quality Information
Recorded investment	422,652	590,654
Commercial real estate
Credit Quality Information
Recorded investment	1,875,592	1,680,082
Commercial real estate | Originated
Credit Quality Information
Recorded investment	1,684,548	1,425,621
Commercial real estate | Acquired
Credit Quality Information
Recorded investment	191,044	254,461
Commercial real estate | Pass | Originated
Credit Quality Information
Recorded investment	1,668,891	1,402,121
Commercial real estate | Pass | Acquired
Credit Quality Information
Recorded investment	182,377	237,439
Commercial real estate | OAEM | Originated
Credit Quality Information
Recorded investment	12,781	22,491
Commercial real estate | OAEM | Acquired
Credit Quality Information
Recorded investment	1,202	8,351
Commercial real estate | Substandard | Originated
Credit Quality Information
Recorded investment	780	1,009
Commercial real estate | Substandard | Acquired
Credit Quality Information
Recorded investment	7,066	8,250
Commercial real estate | Doubtful | Originated
Credit Quality Information
Recorded investment	2,096	0
Commercial real estate | Doubtful | Acquired
Credit Quality Information
Recorded investment	399	421
Multi-family mortgage
Credit Quality Information
Recorded investment	658,480	639,706
Multi-family mortgage | Originated
Credit Quality Information
Recorded investment	620,865	576,214
Multi-family mortgage | Acquired
Credit Quality Information
Recorded investment	37,615	63,492
Multi-family mortgage | Pass | Originated
Credit Quality Information
Recorded investment	619,786	574,972
Multi-family mortgage | Pass | Acquired
Credit Quality Information
Recorded investment	35,785	60,837
Multi-family mortgage | OAEM | Originated
Credit Quality Information
Recorded investment	788	1,242
Multi-family mortgage | OAEM | Acquired
Credit Quality Information
Recorded investment	612	713
Multi-family mortgage | Substandard | Originated
Credit Quality Information
Recorded investment	291	0
Multi-family mortgage | Substandard | Acquired
Credit Quality Information
Recorded investment	1,218	1,942
Multi-family mortgage | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Construction
Credit Quality Information
Recorded investment	130,322	148,013
Construction | Originated
Credit Quality Information
Recorded investment	129,742	146,074
Construction | Acquired
Credit Quality Information
Recorded investment	580	1,939
Construction | Pass | Originated
Credit Quality Information
Recorded investment	129,534	146,074
Construction | Pass | Acquired
Credit Quality Information
Recorded investment	580	1,709
Construction | OAEM | Originated
Credit Quality Information
Recorded investment	208	0
Construction | OAEM | Acquired
Credit Quality Information
Recorded investment	0	230
Construction | Substandard | Originated
Credit Quality Information
Recorded investment	0	0
Construction | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Construction | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Construction | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Commercial
Credit Quality Information
Recorded investment	592,531	514,077
Commercial | Originated
Credit Quality Information
Recorded investment	576,599	462,730
Commercial | Acquired
Credit Quality Information
Recorded investment	15,932	51,347
Commercial | Pass | Originated
Credit Quality Information
Recorded investment	562,615	447,778
Commercial | Pass | Acquired
Credit Quality Information
Recorded investment	11,959	43,925
Commercial | OAEM | Originated
Credit Quality Information
Recorded investment	9,976	12,193
Commercial | OAEM | Acquired
Credit Quality Information
Recorded investment	902	1,852
Commercial | Substandard | Originated
Credit Quality Information
Recorded investment	1,714	1,671
Commercial | Substandard | Acquired
Credit Quality Information
Recorded investment	3,071	5,424
Commercial | Doubtful | Originated
Credit Quality Information
Recorded investment	2,294	1,088
Commercial | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	146
Equipment financing
Credit Quality Information
Recorded investment	721,890	601,424
Equipment financing | Originated
Credit Quality Information
Recorded investment	712,988	587,496
Equipment financing | Acquired
Credit Quality Information
Recorded investment	8,902	13,928
Equipment financing | Pass | Originated
Credit Quality Information
Recorded investment	709,381	583,340
Equipment financing | Pass | Acquired
Credit Quality Information
Recorded investment	8,902	13,795
Equipment financing | OAEM | Originated
Credit Quality Information
Recorded investment	804	932
Equipment financing | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Equipment financing | Substandard | Originated
Credit Quality Information
Recorded investment	1,414	2,338
Equipment financing | Substandard | Acquired
Credit Quality Information
Recorded investment	0	133
Equipment financing | Doubtful | Originated
Credit Quality Information
Recorded investment	1,389	886
Equipment financing | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association
Credit Quality Information
Recorded investment	59,875	51,593
Condominium association | Originated
Credit Quality Information
Recorded investment	59,875	51,593
Condominium association | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Pass | Originated
Credit Quality Information
Recorded investment	59,875	51,593
Condominium association | Pass | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Substandard | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Other consumer
Credit Quality Information
Recorded investment	12,170	11,747
Other consumer | Originated
Credit Quality Information
Recorded investment	12,039	11,580
Other consumer | Acquired
Credit Quality Information
Recorded investment	131	167
Other consumer | Pass | Originated
Credit Quality Information
Recorded investment	12,017	11,540
Other consumer | Pass | Acquired
Credit Quality Information
Recorded investment	131	167
Other consumer | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Other consumer | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Other consumer | Substandard | Originated
Credit Quality Information
Recorded investment	22	40
Other consumer | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Other consumer | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Other consumer | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Residential mortgage
Credit Quality Information
Recorded investment	$ 616,449	$ 571,920
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Residential mortgage | Originated
Credit Quality Information
Recorded investment	$ 527,846	$ 472,078
Percentage of loans to aggregate outstanding amount	85.60%	82.60%
Residential mortgage | Acquired
Credit Quality Information
Recorded investment	$ 88,603	$ 99,842
Percentage of loans to aggregate outstanding amount	14.40%	17.40%
Residential mortgage | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	$ 118,628	$ 105,342
Percentage of loans to aggregate outstanding amount	19.20%	18.40%
Residential mortgage | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	$ 18,857	$ 19,574
Percentage of loans to aggregate outstanding amount	3.10%	3.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	$ 214,390	$ 179,319
Percentage of loans to aggregate outstanding amount	34.80%	31.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	$ 32,986	$ 35,131
Percentage of loans to aggregate outstanding amount	5.30%	6.20%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	$ 173,774	$ 166,467
Percentage of loans to aggregate outstanding amount	28.20%	29.10%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	$ 17,883	$ 22,972
Percentage of loans to aggregate outstanding amount	2.90%	4.00%
Residential mortgage | Loan-to-value ratio, 80% and greater than | Originated
Credit Quality Information
Recorded investment	$ 17,808	$ 19,335
Percentage of loans to aggregate outstanding amount	2.90%	3.40%
Residential mortgage | Loan-to-value ratio, 80% and greater than | Acquired
Credit Quality Information
Recorded investment	$ 14,011	$ 16,268
Percentage of loans to aggregate outstanding amount	2.30%	2.80%
Residential mortgage | Data not available | Originated
Credit Quality Information
Recorded investment	$ 3,246	$ 1,615
Percentage of loans to aggregate outstanding amount	0.50%	0.30%
Residential mortgage | Data not available | Acquired
Credit Quality Information
Recorded investment	$ 4,866	$ 5,897
Percentage of loans to aggregate outstanding amount	0.80%	1.00%
Home equity
Credit Quality Information
Recorded investment	$ 314,553	$ 287,058
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Home equity | Originated
Credit Quality Information
Recorded investment	$ 234,708	$ 181,580
Percentage of loans to aggregate outstanding amount	74.60%	63.20%
Home equity | Acquired
Credit Quality Information
Recorded investment	$ 79,845	$ 105,478
Percentage of loans to aggregate outstanding amount	25.40%	36.80%
Home equity | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	$ 131,584	$ 113,541
Percentage of loans to aggregate outstanding amount	41.80%	39.50%
Home equity | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	$ 48,563	$ 70,293
Percentage of loans to aggregate outstanding amount	15.40%	24.50%
Home equity | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	$ 51,492	$ 35,660
Percentage of loans to aggregate outstanding amount	16.40%	12.40%
Home equity | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	$ 20,623	$ 22,581
Percentage of loans to aggregate outstanding amount	6.60%	7.90%
Home equity | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	$ 32,916	$ 27,123
Percentage of loans to aggregate outstanding amount	10.50%	9.40%
Home equity | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	$ 7,144	$ 10,569
Percentage of loans to aggregate outstanding amount	2.30%	3.70%
Home equity | Loan-to-value ratio, 80% and greater than | Originated
Credit Quality Information
Recorded investment	$ 18,082	$ 4,195
Percentage of loans to aggregate outstanding amount	5.70%	1.50%
Home equity | Loan-to-value ratio, 80% and greater than | Acquired
Credit Quality Information
Recorded investment	$ 2,650	$ 1,178
Percentage of loans to aggregate outstanding amount	0.80%	0.40%
Home equity | Data not available | Originated
Credit Quality Information
Recorded investment	$ 634	$ 1,061
Percentage of loans to aggregate outstanding amount	0.20%	0.40%
Home equity | Data not available | Acquired
Credit Quality Information
Recorded investment	$ 865	$ 857
Percentage of loans to aggregate outstanding amount	0.30%	0.30%
Indirect automobile loans
Credit Quality Information
Recorded investment	$ 13,678	$ 316,987
Indirect automobile loans | Originated
Credit Quality Information
Recorded investment	$ 13,678	$ 316,987
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Indirect automobile loans | Acquired
Credit Quality Information
Recorded investment	$ 0	$ 0
Indirect automobile loans | Credit score, Over 700 | Originated
Credit Quality Information
Recorded investment	$ 5,435	$ 262,160
Percentage of loans to aggregate outstanding amount	39.70%	82.70%
Indirect automobile loans | Credit score, 661-700 | Originated
Credit Quality Information
Recorded investment	$ 1,965	$ 43,422
Percentage of loans to aggregate outstanding amount	14.40%	13.70%
Indirect automobile loans | Credit score, 660 and below | Originated
Credit Quality Information
Recorded investment	$ 6,217	$ 9,927
Percentage of loans to aggregate outstanding amount	45.50%	3.10%
Indirect automobile loans | Data not available | Originated
Credit Quality Information
Recorded investment	$ 61	$ 1,478
Percentage of loans to aggregate outstanding amount	0.40%	0.50%

Allowance for Loan and Lease 68

Allowance for Loan and Lease Losses Allowance for Loan and Lease Losses (Details 3) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Foreclosed residential real estate property held by the creditor	$ 362	$ 410
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	298	0
On accrual	17,953	14,815
On nonaccrual	4,965	5,625
Total troubled debt restructurings	$ 22,918	$ 20,440

Allowance for Loan and Lease 69

Allowance for Loan and Lease Losses (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Age analysis of past due loans
Past Due	$ 39,552	$ 34,920
Current	4,955,988	4,787,687
Total Loans and Leases	4,995,540	4,822,607
Loans and Leases Past Due Greater Than 90 Days and Accruing	8,690	6,008
Nonaccrual Loans and Leases	19,333	13,714
Commercial real estate
Age analysis of past due loans
Total Loans and Leases	1,875,592	1,680,082
Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	658,480	639,706
Construction
Age analysis of past due loans
Total Loans and Leases	130,322	148,013
Commercial
Age analysis of past due loans
Total Loans and Leases	592,531	514,077
Equipment financing
Age analysis of past due loans
Total Loans and Leases	721,890	601,424
Condominium association
Age analysis of past due loans
Total Loans and Leases	59,875	51,593
Residential mortgage
Age analysis of past due loans
Total Loans and Leases	616,449	571,920
Home equity
Age analysis of past due loans
Total Loans and Leases	314,553	287,058
Other consumer
Age analysis of past due loans
Total Loans and Leases	12,170	11,747
Commercial real estate loans
Age analysis of past due loans
Total Loans and Leases	2,664,394	2,467,801
Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	1,875,592	1,680,082
Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	658,480	639,706
Commercial real estate loans | Construction
Age analysis of past due loans
Total Loans and Leases	130,322	148,013
Commercial loans and leases
Age analysis of past due loans
Total Loans and Leases	1,374,296	1,167,094
Commercial loans and leases | Commercial
Age analysis of past due loans
Total Loans and Leases	592,531	514,077
Commercial loans and leases | Equipment financing
Age analysis of past due loans
Total Loans and Leases	721,890	601,424
Commercial loans and leases | Condominium association
Age analysis of past due loans
Total Loans and Leases	59,875	51,593
Indirect automobile loans
Age analysis of past due loans
Total Loans and Leases	13,678	316,987
Consumer loans
Age analysis of past due loans
Total Loans and Leases	943,172	870,725
Consumer loans | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	616,449	571,920
Consumer loans | Home equity
Age analysis of past due loans
Total Loans and Leases	314,553	287,058
Consumer loans | Other consumer
Age analysis of past due loans
Total Loans and Leases	12,170	11,747
31-60 days past due
Age analysis of past due loans
Past Due	14,774	12,439
61-90 days past due
Age analysis of past due loans
Past Due	3,294	8,117
Greater than 90 days past due
Age analysis of past due loans
Past Due	21,484	14,364
Originated
Age analysis of past due loans
Past Due	21,042	16,823
Current	4,551,846	4,215,130
Total Loans and Leases	4,572,888	4,231,953
Loans and Leases Past Due Greater Than 90 Days and Accruing	117	2
Nonaccrual Loans and Leases	12,259	9,132
Originated | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	1,684,548	1,425,621
Originated | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	620,865	576,214
Originated | Construction
Age analysis of past due loans
Total Loans and Leases	129,742	146,074
Originated | Commercial
Age analysis of past due loans
Total Loans and Leases	576,599	462,730
Originated | Equipment financing
Age analysis of past due loans
Total Loans and Leases	712,988	587,496
Originated | Condominium association
Age analysis of past due loans
Total Loans and Leases	59,875	51,593
Originated | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	527,846	472,078
Originated | Home equity
Age analysis of past due loans
Total Loans and Leases	234,708	181,580
Originated | Other consumer
Age analysis of past due loans
Total Loans and Leases	12,039	11,580
Originated | Commercial real estate loans
Age analysis of past due loans
Past Due	4,547	2,592
Current	2,430,608	2,145,317
Total Loans and Leases	2,435,155	2,147,909
Loans and Leases Past Due Greater Than 90 Days and Accruing	16	0
Nonaccrual Loans and Leases	3,167	1,009
Originated | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	3,879	2,207
Current	1,680,669	1,423,414
Total Loans and Leases	1,684,548	1,425,621
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	2,876	1,009
Originated | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	16	385
Current	620,849	575,829
Total Loans and Leases	620,865	576,214
Loans and Leases Past Due Greater Than 90 Days and Accruing	16	0
Nonaccrual Loans and Leases	291	0
Originated | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	652	0
Current	129,090	146,074
Total Loans and Leases	129,742	146,074
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Originated | Commercial loans and leases
Age analysis of past due loans
Past Due	12,701	7,698
Current	1,336,761	1,094,121
Total Loans and Leases	1,349,462	1,101,819
Loans and Leases Past Due Greater Than 90 Days and Accruing	101	2
Nonaccrual Loans and Leases	6,196	5,936
Originated | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	7,953	3,133
Current	568,646	459,597
Total Loans and Leases	576,599	462,730
Loans and Leases Past Due Greater Than 90 Days and Accruing	24	2
Nonaccrual Loans and Leases	3,586	2,722
Originated | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	4,419	4,064
Current	708,569	583,432
Total Loans and Leases	712,988	587,496
Loans and Leases Past Due Greater Than 90 Days and Accruing	77	0
Nonaccrual Loans and Leases	2,610	3,214
Originated | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	329	501
Current	59,546	51,092
Total Loans and Leases	59,875	51,593
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Originated | Indirect automobile loans
Age analysis of past due loans
Past Due	1,499	5,724
Current	12,179	311,263
Total Loans and Leases	13,678	316,987
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	675	645
Originated | Consumer loans
Age analysis of past due loans
Past Due	2,295	809
Current	772,298	664,429
Total Loans and Leases	774,593	665,238
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	2,221	1,542
Originated | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	1,613	501
Current	526,233	471,577
Total Loans and Leases	527,846	472,078
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	1,873	1,340
Originated | Consumer loans | Home equity
Age analysis of past due loans
Past Due	636	256
Current	234,072	181,324
Total Loans and Leases	234,708	181,580
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	319	161
Originated | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	46	52
Current	11,993	11,528
Total Loans and Leases	12,039	11,580
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	29	41
Originated | 31-60 days past due
Age analysis of past due loans
Past Due	11,749	9,536
Originated | 31-60 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	2,434	2,016
Originated | 31-60 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	1,782	1,631
Originated | 31-60 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	385
Originated | 31-60 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	652	0
Originated | 31-60 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	6,464	2,793
Originated | 31-60 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	4,578	758
Originated | 31-60 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	1,681	1,534
Originated | 31-60 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	205	501
Originated | 31-60 days past due | Indirect automobile loans
Age analysis of past due loans
Past Due	1,058	4,635
Originated | 31-60 days past due | Consumer loans
Age analysis of past due loans
Past Due	1,793	92
Originated | 31-60 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	1,384	0
Originated | 31-60 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	390	75
Originated | 31-60 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	19	17
Originated | 61-90 days past due
Age analysis of past due loans
Past Due	2,300	2,410
Originated | 61-90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	0	416
Originated | 61-90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	0	416
Originated | 61-90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	0
Originated | 61-90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Originated | 61-90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	1,726	1,014
Originated | 61-90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	1,007	876
Originated | 61-90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	595	138
Originated | 61-90 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	124	0
Originated | 61-90 days past due | Indirect automobile loans
Age analysis of past due loans
Past Due	335	923
Originated | 61-90 days past due | Consumer loans
Age analysis of past due loans
Past Due	239	57
Originated | 61-90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	0	0
Originated | 61-90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	237	52
Originated | 61-90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	2	5
Originated | Greater than 90 days past due
Age analysis of past due loans
Past Due	6,993	4,877
Originated | Greater than 90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	2,113	160
Originated | Greater than 90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	2,097	160
Originated | Greater than 90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	16	0
Originated | Greater than 90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Originated | Greater than 90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	4,511	3,891
Originated | Greater than 90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	2,368	1,499
Originated | Greater than 90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	2,143	2,392
Originated | Greater than 90 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	0	0
Originated | Greater than 90 days past due | Indirect automobile loans
Age analysis of past due loans
Past Due	106	166
Originated | Greater than 90 days past due | Consumer loans
Age analysis of past due loans
Past Due	263	660
Originated | Greater than 90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	229	501
Originated | Greater than 90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	9	129
Originated | Greater than 90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	25	30
Acquired
Age analysis of past due loans
Past Due	18,510	18,097
Current	404,142	572,557
Total Loans and Leases	422,652	590,654
Loans and Leases Past Due Greater Than 90 Days and Accruing	8,573	6,006
Nonaccrual Loans and Leases	7,074	4,582
Acquired | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	191,044	254,461
Acquired | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	37,615	63,492
Acquired | Construction
Age analysis of past due loans
Total Loans and Leases	580	1,939
Acquired | Commercial
Age analysis of past due loans
Total Loans and Leases	15,932	51,347
Acquired | Equipment financing
Age analysis of past due loans
Total Loans and Leases	8,902	13,928
Acquired | Condominium association
Age analysis of past due loans
Total Loans and Leases	0	0
Acquired | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	88,603	99,842
Acquired | Home equity
Age analysis of past due loans
Total Loans and Leases	79,845	105,478
Acquired | Other consumer
Age analysis of past due loans
Total Loans and Leases	131	167
Acquired | Commercial real estate loans
Age analysis of past due loans
Past Due	10,370	8,368
Current	218,869	311,524
Total Loans and Leases	229,239	319,892
Loans and Leases Past Due Greater Than 90 Days and Accruing	6,059	2,750
Nonaccrual Loans and Leases	2,606	0
Acquired | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	9,293	7,081
Current	181,751	247,380
Total Loans and Leases	191,044	254,461
Loans and Leases Past Due Greater Than 90 Days and Accruing	4,982	2,387
Nonaccrual Loans and Leases	2,606	0
Acquired | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	1,077	1,287
Current	36,538	62,205
Total Loans and Leases	37,615	63,492
Loans and Leases Past Due Greater Than 90 Days and Accruing	1,077	363
Nonaccrual Loans and Leases	0	0
Acquired | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Current	580	1,939
Total Loans and Leases	580	1,939
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Acquired | Commercial loans and leases
Age analysis of past due loans
Past Due	3,341	4,353
Current	21,493	60,922
Total Loans and Leases	24,834	65,275
Loans and Leases Past Due Greater Than 90 Days and Accruing	325	697
Nonaccrual Loans and Leases	2,678	2,483
Acquired | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	3,341	4,233
Current	12,591	47,114
Total Loans and Leases	15,932	51,347
Loans and Leases Past Due Greater Than 90 Days and Accruing	325	624
Nonaccrual Loans and Leases	2,678	2,474
Acquired | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	120
Current	8,902	13,808
Total Loans and Leases	8,902	13,928
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	73
Nonaccrual Loans and Leases	0	9
Acquired | Indirect automobile loans
Age analysis of past due loans
Total Loans and Leases	0	0
Acquired | Consumer loans
Age analysis of past due loans
Past Due	4,799	5,376
Current	163,780	200,111
Total Loans and Leases	168,579	205,487
Loans and Leases Past Due Greater Than 90 Days and Accruing	2,189	2,559
Nonaccrual Loans and Leases	1,790	2,099
Acquired | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	2,941	2,715
Current	85,662	97,127
Total Loans and Leases	88,603	99,842
Loans and Leases Past Due Greater Than 90 Days and Accruing	2,047	2,372
Nonaccrual Loans and Leases	352	342
Acquired | Consumer loans | Home equity
Age analysis of past due loans
Past Due	1,858	2,661
Current	77,987	102,817
Total Loans and Leases	79,845	105,478
Loans and Leases Past Due Greater Than 90 Days and Accruing	142	187
Nonaccrual Loans and Leases	1,438	1,757
Acquired | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Current	131	167
Total Loans and Leases	131	167
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Acquired | 31-60 days past due
Age analysis of past due loans
Past Due	3,025	2,903
Acquired | 31-60 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	1,336	1,184
Acquired | 31-60 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	1,336	989
Acquired | 31-60 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	195
Acquired | 31-60 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | 31-60 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	351	714
Acquired | 31-60 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	351	712
Acquired | 31-60 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	2
Acquired | 31-60 days past due | Consumer loans
Age analysis of past due loans
Past Due	1,338	1,005
Acquired | 31-60 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	326	0
Acquired | 31-60 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	1,012	1,005
Acquired | 31-60 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due
Age analysis of past due loans
Past Due	994	5,707
Acquired | 61-90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	369	4,434
Acquired | 61-90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	369	3,705
Acquired | 61-90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	729
Acquired | 61-90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	23	540
Acquired | 61-90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	23	488
Acquired | 61-90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	52
Acquired | 61-90 days past due | Consumer loans
Age analysis of past due loans
Past Due	602	733
Acquired | 61-90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	216	0
Acquired | 61-90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	386	733
Acquired | 61-90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Acquired | Greater than 90 days past due
Age analysis of past due loans
Past Due	14,491	9,487
Acquired | Greater than 90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	8,665	2,750
Acquired | Greater than 90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	7,588	2,387
Acquired | Greater than 90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	1,077	363
Acquired | Greater than 90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | Greater than 90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	2,967	3,099
Acquired | Greater than 90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	2,967	3,033
Acquired | Greater than 90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	66
Acquired | Greater than 90 days past due | Consumer loans
Age analysis of past due loans
Past Due	2,859	3,638
Acquired | Greater than 90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	2,399	2,715
Acquired | Greater than 90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	460	923
Acquired | Greater than 90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	$ 0	$ 0

Allowance for Loan and Lease 70

Allowance for Loan and Lease Losses (Details 5)	12 Months Ended
	Dec. 31, 2015class
Allowance for loan losses and recorded investment in loans
Number of days past due, non-accrual status (in days)	90 days
Commercial real estate loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	3
Commercial real estate loans | Commercial real estate
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	37.50%
Commercial real estate loans | Multi-family mortgage
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	13.20%
Commercial real estate loans | Construction
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	2.60%
Commercial loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	3
Commercial loans | Commercial
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	11.90%
Commercial loans | Equipment financing
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	14.50%
Commercial loans | Condominium association
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	1.20%
Indirect automobile loans
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	0.30%
Consumer loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	4
Loans not made, loan to value ratio, minimum (as a percent)	80.00%
Number of days past due, non-accrual status (in days)	90 days
Consumer loans | Residential mortgage
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	12.30%
Consumer loans | Home equity
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	6.30%
Consumer loans | Other consumer
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	0.20%

Allowance for Loan and Lease 71

Allowance for Loan and Lease Losses (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impaired Loans and Leases
Recorded investment	$ 51,705	$ 48,657
Unpaid principal balance	51,686	48,633
Related allowance	3,638	1,163
Average recorded investment	57,340	50,072	$ 33,492
Interest income recognized, Total	1,259	1,216	882
Recorded investment in loans and leases by portfolio segment
Total, Allowance	56,739	53,659
Total loans and leases	4,995,540	4,822,607
Commercial real estate loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	30,151	29,594
Total loans and leases	2,664,394	2,467,801
Commercial
Recorded investment in loans and leases by portfolio segment
Total, Allowance	22,018	15,957
Total loans and leases	1,374,296	1,167,094
Consumer loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	4,301	3,359
Total loans and leases	943,172	870,725
Indirect automobile loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	269	2,331
Total loans and leases	13,678	316,987
Unallocated
Recorded investment in loans and leases by portfolio segment
Total, Allowance	0	2,418
Total loans and leases	0	0
Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	21,437	19,246
Recorded investment, loans with related allowance recorded	8,365	6,314
Recorded investment	29,802	25,560
Unpaid principal balance with no related allowance recorded	21,405	19,217
Unpaid principal balance with related allowance recorded	8,363	6,306
Unpaid principal balance	29,768	25,523
Related allowance	3,369	886
Recorded investment, nonaccrual loans	9,300	7,100
Average recorded investment with no related allowance recorded	23,409	17,792	7,518
Average recorded investment with related allowance recorded	10,866	5,966	6,455
Average recorded investment	34,275	23,758	13,973
Interest income recognized with no related allowance recorded	792	487	266
Interest income recognized with related allowance recorded	207	135	169
Interest income recognized, Total	999	622	435
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	3,369	886
Collectively evaluated for impairment, allowance	51,618	49,925
Total, Allowance	54,987	50,811
Individually evaluated for impairment, Loans and Leases	29,184	25,560
Collectively evaluated for impairment, Loans and Leases	4,543,704	4,206,393
Total loans and leases	4,572,888	4,231,953
Originated | Commercial real estate loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	2,758	2,751
Recorded investment, loans with related allowance recorded	6,150	4,119
Unpaid principal balance with no related allowance recorded	2,756	2,748
Unpaid principal balance with related allowance recorded	6,150	4,119
Related allowance	2,167	108
Average recorded investment with no related allowance recorded	3,999	2,786	2,184
Average recorded investment with related allowance recorded	5,132	3,223	1,464
Interest income recognized with no related allowance recorded	86	102	92
Interest income recognized with related allowance recorded	197	69	43
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	2,167	108
Collectively evaluated for impairment, allowance	26,857	27,457
Total, Allowance	29,024	27,565
Individually evaluated for impairment, Loans and Leases	8,907	6,870
Collectively evaluated for impairment, Loans and Leases	2,426,248	2,141,039
Total loans and leases	2,435,155	2,147,909
Originated | Commercial
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	14,097	13,440
Recorded investment, loans with related allowance recorded	2,215	2,019
Unpaid principal balance with no related allowance recorded	14,074	13,421
Unpaid principal balance with related allowance recorded	2,213	2,011
Related allowance	1,202	768
Average recorded investment with no related allowance recorded	15,143	11,840	4,257
Average recorded investment with related allowance recorded	5,650	2,285	1,781
Interest income recognized with no related allowance recorded	641	343	144
Interest income recognized with related allowance recorded	10	51	29
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	1,202	768
Collectively evaluated for impairment, allowance	20,545	14,631
Total, Allowance	21,747	15,399
Individually evaluated for impairment, Loans and Leases	15,806	15,459
Collectively evaluated for impairment, Loans and Leases	1,333,656	1,086,360
Total loans and leases	1,349,462	1,101,819
Originated | Consumer loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,582	3,055
Recorded investment, loans with related allowance recorded	0	176
Unpaid principal balance with no related allowance recorded	4,575	3,048
Unpaid principal balance with related allowance recorded	0	176
Related allowance	0	10
Average recorded investment with no related allowance recorded	4,267	3,166	1,077
Average recorded investment with related allowance recorded	84	458	3,210
Interest income recognized with no related allowance recorded	65	42	30
Interest income recognized with related allowance recorded	0	15	97
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0	10
Collectively evaluated for impairment, allowance	3,947	3,088
Total, Allowance	3,947	3,098
Individually evaluated for impairment, Loans and Leases	4,471	3,231
Collectively evaluated for impairment, Loans and Leases	770,122	662,007
Total loans and leases	774,593	665,238
Originated | Indirect automobile loans
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0	0
Collectively evaluated for impairment, allowance	269	2,331
Total, Allowance	269	2,331
Individually evaluated for impairment, Loans and Leases	0	0
Collectively evaluated for impairment, Loans and Leases	13,678	316,987
Total loans and leases	13,678	316,987
Originated | Unallocated
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0	0
Collectively evaluated for impairment, allowance	0	2,418
Total, Allowance	0	2,418
Individually evaluated for impairment, Loans and Leases	0	0
Collectively evaluated for impairment, Loans and Leases	0	0
Total loans and leases	0	0
Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	18,637	22,150
Recorded investment, loans with related allowance recorded	3,266	947
Recorded investment	21,903	23,097
Unpaid principal balance with no related allowance recorded	18,652	22,163
Unpaid principal balance with related allowance recorded	3,266	947
Unpaid principal balance	21,918	23,110
Related allowance	269	277
Recorded investment, nonaccrual loans	7,100	4,600
Average recorded investment with no related allowance recorded	21,465	24,460	16,177
Average recorded investment with related allowance recorded	1,600	1,854	3,342
Average recorded investment	23,065	26,314	19,519
Interest income recognized with no related allowance recorded	252	500	400
Interest income recognized with related allowance recorded	8	94	47
Interest income recognized, Total	260	594	447
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	269	185
Collectively evaluated for impairment, allowance	449	872
Total, Allowance	1,752	2,848
Individually evaluated for impairment, Loans and Leases	9,884	7,646
Collectively evaluated for impairment, Loans and Leases	181,084	270,618
Total loans and leases	422,652	590,654
Acquired | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	1,034	1,791
Total loans and leases	231,684	312,390
Acquired | Commercial real estate loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	7,035	9,413
Recorded investment, loans with related allowance recorded	2,606	244
Unpaid principal balance with no related allowance recorded	7,035	9,428
Unpaid principal balance with related allowance recorded	2,606	244
Related allowance	148	22
Average recorded investment with no related allowance recorded	9,200	10,884	9,639
Average recorded investment with related allowance recorded	713	942	2,765
Interest income recognized with no related allowance recorded	125	350	251
Interest income recognized with related allowance recorded	0	76	42
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	148	0
Collectively evaluated for impairment, allowance	333	648
Total, Allowance	1,127	2,029
Individually evaluated for impairment, Loans and Leases	3,188	626
Collectively evaluated for impairment, Loans and Leases	63,857	97,141
Total loans and leases	229,239	319,892
Acquired | Commercial real estate loans | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	646	1,381
Total loans and leases	162,194	222,125
Acquired | Commercial
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,053	6,049
Recorded investment, loans with related allowance recorded	486	478
Unpaid principal balance with no related allowance recorded	4,052	6,047
Unpaid principal balance with related allowance recorded	486	478
Related allowance	112	214
Average recorded investment with no related allowance recorded	4,428	6,875	5,205
Average recorded investment with related allowance recorded	638	631	577
Interest income recognized with no related allowance recorded	65	122	129
Interest income recognized with related allowance recorded	0	15	5
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	112	144
Collectively evaluated for impairment, allowance	71	222
Total, Allowance	271	558
Individually evaluated for impairment, Loans and Leases	4,090	4,458
Collectively evaluated for impairment, Loans and Leases	12,081	38,504
Total loans and leases	24,834	65,275
Acquired | Commercial | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	88	192
Total loans and leases	8,663	22,313
Acquired | Consumer loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	7,549	6,688
Recorded investment, loans with related allowance recorded	174	225
Unpaid principal balance with no related allowance recorded	7,565	6,688
Unpaid principal balance with related allowance recorded	174	225
Related allowance	9	41
Average recorded investment with no related allowance recorded	7,837	6,701	1,333
Average recorded investment with related allowance recorded	249	281	0
Interest income recognized with no related allowance recorded	62	28	20
Interest income recognized with related allowance recorded	8	3	$ 0
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	9	41
Collectively evaluated for impairment, allowance	45	2
Total, Allowance	354	261
Individually evaluated for impairment, Loans and Leases	2,606	2,562
Collectively evaluated for impairment, Loans and Leases	105,146	134,973
Total loans and leases	168,579	205,487
Acquired | Consumer loans | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	300	218
Total loans and leases	60,827	67,952
Acquired | Indirect automobile loans
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0	0
Collectively evaluated for impairment, allowance	0	0
Total, Allowance	0	0
Individually evaluated for impairment, Loans and Leases	0	0
Collectively evaluated for impairment, Loans and Leases	0	0
Total loans and leases	0	0
Acquired | Indirect automobile loans | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	0	0
Total loans and leases	0	0
Acquired | Unallocated
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0	0
Collectively evaluated for impairment, allowance	0	0
Total, Allowance	0	0
Individually evaluated for impairment, Loans and Leases	0	0
Collectively evaluated for impairment, Loans and Leases	0	0
Total loans and leases	0	0
Acquired | Unallocated | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	0	0
Total loans and leases	$ 0	$ 0

Allowance for Loan and Lease 72

Allowance for Loan and Lease Losses (Details 7)	12 Months Ended
	Dec. 31, 2015USD ($)loan	Dec. 31, 2014USD ($)loan	Dec. 31, 2013USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	20	23	16
Recorded Investment, At Modification	$ 7,164,000	$ 7,276,000	$ 7,883,000
Recorded Investment, At end of period	6,873,000	6,813,000	6,548,000
Specific Allowance for Loan and Lease Losses	119,000	15,000	77,000
Nonaccrual Loans and Leases	$ 508,000	$ 863,000	$ 2,549,000
Defaulted, number of loans/leases | loan	4	8	3
Defaulted, recorded investment	$ 300,000	$ 1,670,000	$ 1,706,000
Loans with one modification	4,242,000	3,736,000	6,058,000
Loans with more than one modification	2,631,000	3,077,000	490,000
Financial impact of modification of performing and nonperforming loans	200,000	300,000	0
Commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings	0
Extended maturity
Financing Receivable, Modifications [Line Items]
Loans with one modification	2,215,000	3,241,000	3,841,000
Loans with more than one modification	2,598,000	1,951,000	490,000
Adjusted principal
Financing Receivable, Modifications [Line Items]
Loans with one modification	0	0	908,000
Adjusted interest rate
Financing Receivable, Modifications [Line Items]
Loans with one modification	0	0	755,000
Interest only
Financing Receivable, Modifications [Line Items]
Loans with one modification	1,335,000	16,000	0
Loans with more than one modification	0	292,000	0
Combination maturity, principal, interest rate
Financing Receivable, Modifications [Line Items]
Loans with one modification	692,000	479,000	554,000
Loans with more than one modification	$ 33,000	$ 834,000	$ 0
Originated
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	14	16	9
Recorded Investment, At Modification	$ 6,322,000	$ 5,717,000	$ 3,937,000
Recorded Investment, At end of period	6,045,000	5,218,000	2,686,000
Specific Allowance for Loan and Lease Losses	119,000	15,000	77,000
Nonaccrual Loans and Leases	$ 508,000	$ 797,000	$ 1,214,000
Defaulted, number of loans/leases | loan	2	7	2
Defaulted, recorded investment	$ 265,000	$ 1,251,000	$ 371,000
Originated | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	0	1	1
Recorded Investment, At Modification	$ 0	$ 953,000	$ 1,039,000
Recorded Investment, At end of period	0	932,000	0
Specific Allowance for Loan and Lease Losses	0	0	0
Nonaccrual Loans and Leases	$ 0	$ 0	$ 0
Defaulted, number of loans/leases | loan	0	0	0
Defaulted, recorded investment	$ 0	$ 0	$ 0
Originated | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	9	6	2
Recorded Investment, At Modification	$ 5,757,000	$ 2,884,000	$ 926,000
Recorded Investment, At end of period	5,497,000	2,948,000	918,000
Specific Allowance for Loan and Lease Losses	119,000	0	0
Nonaccrual Loans and Leases	$ 258,000	$ 628,000	$ 0
Defaulted, number of loans/leases | loan	1	3	0
Defaulted, recorded investment	$ 237,000	$ 615,000	$ 0
Originated | Equipment financing
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	1	6	5
Recorded Investment, At Modification	$ 112,000	$ 984,000	$ 1,557,000
Recorded Investment, At end of period	100,000	936,000	1,415,000
Specific Allowance for Loan and Lease Losses	0	15,000	77,000
Nonaccrual Loans and Leases	$ 0	$ 169,000	$ 861,000
Defaulted, number of loans/leases | loan	0	4	2
Defaulted, recorded investment	$ 0	$ 636,000	$ 371,000
Originated | Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	1	1	1
Recorded Investment, At Modification	$ 100,000	$ 496,000	$ 415,000
Recorded Investment, At end of period	150,000	0	353,000
Specific Allowance for Loan and Lease Losses	0	0	0
Nonaccrual Loans and Leases	$ 151,000	$ 0	$ 353,000
Defaulted, number of loans/leases | loan	0	0	0
Defaulted, recorded investment	$ 0	$ 0	$ 0
Originated | Home equity
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	3	2
Recorded Investment, At Modification	$ 353,000	$ 400,000
Recorded Investment, At end of period	298,000	402,000
Specific Allowance for Loan and Lease Losses	0	0
Nonaccrual Loans and Leases	$ 99,000	$ 0
Defaulted, number of loans/leases | loan	1	0
Defaulted, recorded investment	$ 28,000	$ 0
Acquired
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	6	7	7
Recorded Investment, At Modification	$ 842,000	$ 1,559,000	$ 3,946,000
Recorded Investment, At end of period	828,000	1,595,000	3,862,000
Specific Allowance for Loan and Lease Losses	0	0	0
Nonaccrual Loans and Leases	$ 0	$ 66,000	$ 1,335,000
Defaulted, number of loans/leases | loan	2	1	1
Defaulted, recorded investment	$ 35,000	$ 419,000	$ 1,335,000
Acquired | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan			1
Recorded Investment, At Modification			$ 737,000
Recorded Investment, At end of period			727,000
Specific Allowance for Loan and Lease Losses			0
Nonaccrual Loans and Leases			$ 0
Defaulted, number of loans/leases | loan			0
Defaulted, recorded investment			$ 0
Acquired | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	4	6	6
Recorded Investment, At Modification	$ 642,000	$ 1,369,000	$ 3,209,000
Recorded Investment, At end of period	632,000	1,406,000	3,135,000
Specific Allowance for Loan and Lease Losses	0	0	0
Nonaccrual Loans and Leases	$ 0	$ 66,000	$ 1,335,000
Defaulted, number of loans/leases | loan	1	1	1
Defaulted, recorded investment	$ 11,000	$ 419,000	$ 1,335,000
Acquired | Home equity
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	2
Recorded Investment, At Modification	$ 200,000
Recorded Investment, At end of period	196,000
Specific Allowance for Loan and Lease Losses	0
Nonaccrual Loans and Leases	$ 0
Defaulted, number of loans/leases | loan	1
Defaulted, recorded investment	$ 24,000

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Premises and Equipment
Premises and Equipment, gross amount		$ 129,878	$ 125,287
Accumulated depreciation and amortization		51,722	44,668
Total premises and equipment		78,156	80,619
Depreciation and amortization expense		7,200	7,000	$ 6,300
Proceeds from sales of premises and equipment		0		0
Gain on sale/disposals of premises and equipment, net		0	1,502	$ 0
Land
Premises and Equipment
Premises and Equipment, gross amount		7,562	7,562
Office building and improvements
Premises and Equipment
Premises and Equipment, gross amount		81,466	78,461
Furniture, fixtures and equipment
Premises and Equipment
Premises and Equipment, gross amount		13,019	12,224
Vehicles
Premises and Equipment
Premises and Equipment, gross amount		221	144
Computer Equipment
Premises and Equipment
Premises and Equipment, gross amount		$ 8,677	$ 8,400
Estimated useful life		3 years	3 years
Core processing system and software
Premises and Equipment
Premises and Equipment, gross amount		$ 18,933	$ 18,496
Facility
Premises and Equipment
Total premises and equipment	$ 400
Proceeds from sales of premises and equipment	$ 2,200
Cost of sale			200
Gain on sale/disposals of premises and equipment, net			$ 1,600
Minimum | Office building and improvements
Premises and Equipment
Estimated useful life		10 years	10 years
Minimum | Furniture, fixtures and equipment
Premises and Equipment
Estimated useful life		5 years	5 years
Minimum | Vehicles
Premises and Equipment
Estimated useful life		3 years	3 years
Minimum | Core processing system and software
Premises and Equipment
Estimated useful life		3 years	3 years
Maximum | Office building and improvements
Premises and Equipment
Estimated useful life		40 years	40 years
Maximum | Furniture, fixtures and equipment
Premises and Equipment
Estimated useful life		25 years	25 years
Maximum | Vehicles
Premises and Equipment
Estimated useful life		5 years	5 years
Maximum | Core processing system and software
Premises and Equipment
Estimated useful life		7 years 6 months	7 years 6 months

Goodwill and Other Intangible74

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Balance at beginning of year	$ 137,890	$ 137,890	$ 137,890
Additions	0	0	0
Adjustments to original goodwill	0	0	0
Balance at end of year	$ 137,890	$ 137,890	$ 137,890

Goodwill and Other Intangible75

Goodwill and Other Intangible Assets (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other intangibe assets:
Gross amount	$ 39,782,000	$ 39,782,000
Accumulated amortization	29,149,000	26,238,000
Carrying Amount	10,633,000	13,544,000
Impairment losses relating to other acquisition-related intangible assets	0	0	$ 0
Core deposits
Other intangibe assets:
Gross amount	36,172,000	36,172,000
Accumulated amortization	26,628,000	23,717,000
Carrying Amount	$ 9,544,000	12,455,000
Weighted-average amortization period	11 years
Trade name
Other intangibe assets:
Gross amount	$ 1,600,000	1,600,000
Accumulated amortization	511,000	511,000
Carrying Amount	1,089,000	1,089,000
Trust relationship
Other intangibe assets:
Gross amount	1,568,000	1,568,000
Accumulated amortization	1,568,000	1,568,000
Carrying Amount	$ 0	0
Weighted-average amortization period	1 year
Other intangible
Other intangibe assets:
Gross amount	$ 442,000	442,000
Accumulated amortization	442,000	442,000
Carrying Amount	$ 0	$ 0

Goodwill and Other Intangible76

Goodwill and Other Intangible Assets (Details 3) $ in Millions	Dec. 31, 2013USD ($)
Trade name
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 1.1

Goodwill and Other Intangible77

Goodwill and Other Intangible Assets (Details 4) $ in Thousands	Dec. 31, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 2,500
2,017	2,089
2,018	1,669
2,019	1,295
2,020	944
Thereafter	1,047
Total	$ 9,544

Other Assets (Details)

Other Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)policy	Dec. 31, 2014USD ($)policy	Dec. 31, 2013USD ($)policy
Acquisitions
Number of policies owned | policy	9	11	11
Other non-interest income
Acquisitions
Tax exempt BOLI income | $	$ 1	$ 1.1	$ 1.1
BankRI
Acquisitions
Number of policies owned | policy	7	9
Net cash surrender value | $	$ 36.8	$ 35.8
First Ipswich
Acquisitions
Number of policies owned | policy	2	2
Net cash surrender value | $	$ 0.8	$ 0.7

Other Assets (Details 2)

Other Assets (Details 2) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015USD ($)project$ / shares	Sep. 30, 2015USD ($)$ / shares	Jun. 30, 2015USD ($)$ / shares	Mar. 31, 2015USD ($)$ / shares	Dec. 31, 2014USD ($)$ / shares	Sep. 30, 2014USD ($)$ / shares	Jun. 30, 2014USD ($)$ / shares	Mar. 31, 2014USD ($)$ / shares	Dec. 31, 2015USD ($)project$ / shares		Dec. 31, 2014USD ($)$ / shares		Dec. 31, 2013USD ($)$ / shares		Jan. 01, 2015USD ($)
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets	[1]	$ 86,751				$ 80,479				$ 86,751		$ 80,479
Unfunded commitments related to affordable housing projects included in other liabilities		1,300				1,300				1,300		1,300		$ 1,000
Investment amortization included in provision for income taxes										1,654
Amount recognized as income tax benefit										(656)
Prospective Adoption of New Accounting Pronouncements [Abstract]
Other assets	[1]	86,751				80,479				86,751		80,479
Retained earnings	[1]	109,675				84,860				109,675		84,860
Loss from investments in affordable housing projects		1,556	$ 900	$ 941	$ 0	562	$ 322	$ 62	$ 0	3,397		946		0
Provision for income taxes		8,237	6,897	7,115	7,104	6,586	7,163	6,158	6,379	29,353	[2]	26,286	[2]	20,664	[2]
Net income		$ 13,327	$ 12,888	$ 11,865	$ 11,703	$ 10,875	$ 11,740	$ 10,131	$ 10,542	$ 49,782	[2],[3]	$ 43,288	[2],[3]	$ 36,015	[2],[3]
Basic EPS (in dollars per share) | $ / shares		$ 0.19	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.17	$ 0.15	$ 0.15	$ 0.71		$ 0.62		$ 0.52
Effective income tax rate (as a percent)										35.90%		36.70%		35.30%
Affordable housing project
Investment in housing programs
Number of investments | project		10								10
Maximum percentage of outstanding equity interest that can be invested by the entity in any single project										50.00%
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets		$ 11,604				$ 10,131				$ 11,604		$ 10,131		$ 10,301
Unfunded commitments related to affordable housing projects included in other liabilities		3,163				2,608				3,163		2,608		2,904
Investment in affordable housing tax credits included in other liabilities										1,588		1,432		1,105
Investment in affordable housing tax benefits included in other liabilities										656		669		553
Prospective Adoption of New Accounting Pronouncements [Abstract]
Other assets		$ 11,604				10,131				$ 11,604		10,131		10,301
Accounting Standards Update 2014-01
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets						80,479						80,479
Prospective Adoption of New Accounting Pronouncements [Abstract]
Other assets						80,479						80,479
Retained earnings						84,860						84,860
Loss from investments in affordable housing projects												0		0
Provision for income taxes												26,286		20,664
Net income												$ 43,288		$ 36,015
Retained earnings	[1]															$ 1,100
Basic EPS (in dollars per share) | $ / shares												$ 0.62		$ 0.52
Effective income tax rate (as a percent)												36.70%		35.30%
Scenario, Previously Reported | Accounting Standards Update 2014-01
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets						79,411						$ 79,411
Prospective Adoption of New Accounting Pronouncements [Abstract]
Other assets						79,411						79,411
Retained earnings						83,792						83,792
Loss from investments in affordable housing projects												(2,060)		$ (1,812)
Provision for income taxes												24,749		19,481
Net income												$ 42,765		$ 35,386
Basic EPS (in dollars per share) | $ / shares												$ 0.61		$ 0.51
Effective income tax rate (as a percent)												35.50%		34.40%
Prior period adjustment | Accounting Standards Update 2014-01
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets						1,068						$ 1,068
Prospective Adoption of New Accounting Pronouncements [Abstract]
Other assets						1,068						1,068
Retained earnings						$ 1,068						1,068
Loss from investments in affordable housing projects												2,060		$ 1,812
Provision for income taxes												1,537		1,183
Net income												$ 523		$ 629
Basic EPS (in dollars per share) | $ / shares												$ 0.01		$ 0.01
Effective income tax rate (as a percent)												1.20%		0.90%
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Deposits (Details)

Deposits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Demand checking accounts	$ 799,117,000	$ 726,118,000
NOW accounts	283,972,000	235,063,000
Savings accounts	540,788,000	531,727,000
Money market accounts	1,594,269,000	1,518,490,000
Total core deposit accounts	3,218,146,000	3,011,398,000
Certificate of deposit accounts maturing:
Within six months	320,975,000	363,258,000
After six months but within 1 year	395,516,000	258,379,000
After 1 year but within 2 years	226,513,000	232,658,000
After 2 years but within 3 years	60,730,000	36,685,000
After 3 years but within 4 years	30,002,000	24,059,000
After 4 years but within 5 years	53,717,000	31,630,000
After 5 Years	419,000	39,000
Total certificate of deposit accounts	1,087,872,000	946,708,000
Total deposits	$ 4,306,018,000	$ 3,958,106,000
Weighted Average Rate of deposit accounts
Demand checking accounts (as a percent)	0.00%	0.00%
NOW accounts (as a percent)	0.07%	0.07%
Savings accounts (as a percent)	0.25%	0.21%
Money market savings accounts (as a percent)	0.44%	0.52%
Total transaction deposit accounts (as a percent)	0.26%	0.31%
Weighted Average Rate of certificate of deposit accounts maturing:
Within six months (as a percent)	0.65%	0.70%
After six months but within 1 year (as a percent)	0.83%	0.72%
After 1 year but within 2 years (as a percent)	1.02%	1.08%
After 2 years but within 3 years (as a percent)	1.42%	1.49%
After 3 years but within 4 years (as a percent)	1.78%	1.32%
After 4 years but within 5 years (as a percent)	1.88%	1.75%
After 5 years (as a percent)	1.82%	1.34%
Total certificate of deposit accounts (as a percent)	0.93%	0.88%
Total of weighted average rate of deposits (as a percent)	0.43%	0.44%
Threshold for disclosure of time deposit issued amounts	$ 250,000	$ 250,000
Time Deposits, $100,000 or More	168,400,000	222,200,000
Interest-bearing deposits:
NOW accounts	179,000	171,000	$ 173,000
Savings accounts	1,094,000	1,197,000	1,288,000
Money market accounts	6,935,000	7,846,000	8,220,000
Certificate of deposit accounts	9,272,000	7,846,000	9,092,000
Total interest-bearing deposits	17,480,000	17,060,000	$ 18,773,000
Related party deposits	40,500,000	16,100,000
Deposits pledged as collateral	$ 170,400,000	$ 93,000,000

Borrowed Funds (Details)

Borrowed Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Borrowed funds
Total borrowed funds	$ 983,029	$ 1,126,404
Total interest expense on borrowed funds	15,065	12,354	$ 11,393
Securities available-for-sale and loans pledged as collateral	2,300,000	2,100,000
Advances from the FHLBB
Borrowed funds
Total borrowed funds	861,866	1,004,026
Total interest expense on borrowed funds	9,950	10,535	10,886
Subordinated debentures and notes
Borrowed funds
Total borrowed funds	82,936	82,763
Total interest expense on borrowed funds	5,001	1,740	439
Other borrowed funds
Borrowed funds
Total borrowed funds	38,227	39,615
Total interest expense on borrowed funds	$ 114	$ 79	$ 68

Borrowed Funds (Details 2)

Borrowed Funds (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Amount
Within 1 year	$ 575,749	$ 583,000
Over 1 year to 2 years	228,422	217,054
Over 2 years to 3 years	36,476	145,326
Over 3 years to 4 years	5,342	36,550
Over 4 years to 5 years	91	5,416
Over 5 years	15,786	16,680
Total	861,866	1,004,026
Callable Amount
Within 1 year	30,599	0
Over 1 year to 2 years	114,922	31,353
Over 2 years to 3 years	10,038	116,828
Over 3 years to 4 years	0	10,054
Over 4 years to 5 years	0	0
Over 5 years	0	0
Total	$ 155,559	$ 158,235
Weighted Average Rate
Within 1 year (as a percent)	0.70%	0.52%
Over 1 year to 2 years (as a percent)	1.89%	0.89%
Over 2 years to 3 years (as a percent)	2.46%	2.43%
Over 3 years to 4 years (as a percent)	2.17%	2.46%
Over 4 years to 5 years (as a percent)	2.04%	2.21%
Over 5 years (as a percent)	4.21%	4.18%
Weighted average interest rate of total advances from the FHLB (as a percent)	1.16%	1.02%
Total available borrowing capacity from Federal Home Loan Bank	$ 1,400,000
Qualifying collateral available for Federal Home Loan Bank borrowings	2,100,000
Outstanding at end of year	983,029	$ 1,126,404
Repurchase agreements
Weighted Average Rate
Outstanding at end of year	38,227	39,633
Average outstanding for the year	34,468	28,724
Maximum outstanding at any month-end	$ 38,231	$ 39,633
Weighted average rate at end of year	0.19%	0.16%
Weighted average rate paid for the year	0.33%	0.28%

Borrowed Funds (Details 3)

Borrowed Funds (Details 3) - USD ($)	Sep. 15, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Borrowed funds
Total borrowed funds		$ 983,029,000	$ 1,126,404,000
Accretion adjustment		(1,841,000)	(2,656,000)	$ (3,200,000)
Subordinated debenture maturing June 26, 2033
Borrowed funds
Total borrowed funds		4,725,000	4,696,000
Subordinated debenture maturing March 17, 2034
Borrowed funds
Total borrowed funds		4,589,000	4,543,000
Subordinated debenture maturing September 15, 2029
Borrowed funds
Total borrowed funds		$ 73,624,000	73,524,000
LIBOR | Subordinated debenture maturing June 26, 2033
Borrowed funds
Variable interest rate spread (as a percent)		3.10%
LIBOR | Subordinated debenture maturing March 17, 2034
Borrowed funds
Variable interest rate spread (as a percent)		2.79%
Interest rate period 1 | Subordinated debenture maturing September 15, 2029
Borrowed funds
Fixed interest rate		6.00%
Interest rate period 2 | LIBOR | Subordinated debenture maturing September 15, 2029
Borrowed funds
Variable interest rate spread (as a percent)		3.315%
Subordinated debentures and notes | Subordinated debenture maturing September 15, 2029
Borrowed funds
Principal amount	$ 75,000,000
Accretion adjustment		$ 700,000	800,000
Capitalized financing costs		$ 1,400,000	$ 1,500,000
Subordinated debentures and notes | Interest rate period 1 | Subordinated debenture maturing September 15, 2029
Borrowed funds
Fixed interest rate	6.00%
Subordinated debentures and notes | Interest rate period 2 | LIBOR | Subordinated debenture maturing September 15, 2029
Borrowed funds
Variable interest rate spread (as a percent)	3.315%

Commitments and Contingencies84

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Loan commitments
Unadvanced portion of loans and leases	$ 648,291	$ 629,351
Unused lines of credit:
Home equity	280,786	244,603
Other consumer	12,383	10,876
Other commercial	529	728
Unused letters of credit:
Financial standby letters of credit	12,389	16,762
Performance standby letters of credit	392	3,126
Commercial and similar letters of credit	821	50
Back-to-back interest rate swaps	490,632	109,362
Unfunded credit commitments liability	1,300	1,300
Fair value of interest rate swap assets	8,700	2,700
Fair value of interest rate swap liabilities	8,800	2,700
Commercial real estate
Loan commitments
Commitments to originate loans and leases	36,000	107,179
Commercial
Loan commitments
Commitments to originate loans and leases	78,017	102,353
Residential mortgage
Loan commitments
Commitments to originate loans and leases	$ 19,430	$ 20,520
Maximum
Loan commitments
Term of operating lease	25 years

Commitments and Contingencies85

Commitments and Contingencies (Details 2) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
2,016		$ 4,933
2,017		4,472
2,018		4,071
2,019		3,220
2,020		2,664
Thereafter		13,521
Total		32,881
Total rental expense		5,500	$ 6,500	$ 5,200
Lease acceleration related to relocation		200	800
Proceeds from sales of loans and leases held-for-sale, net		64,398	34,717	$ 56,326
Rental income		$ 400	$ 400
Indirect automobile loans
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
Proceeds from sales of loans and leases held-for-sale, net	$ 255,200
Minimum
Operating Leased Assets [Line Items]
Term of operating lease		5 years
Maximum
Operating Leased Assets [Line Items]
Term of operating lease		25 years

Earnings per Share (EPS) (Detai

Earnings per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	[1]									$ 49,782	$ 43,288	$ 36,015
Weighted average shares outstanding		70,177,382	70,129,056	70,049,829	70,036,090	70,024,495	69,989,909	69,886,576	69,875,473	70,098,561	69,945,028	69,808,164
Effect of dilutive securities (in shares)										137,307	109,787	75,760
Adjusted weighted average shares outstanding		70,318,657	70,240,020	70,215,850	70,164,105	70,130,243	70,088,987	70,012,377	69,983,999	70,235,868	70,054,815	69,883,924
Basic EPS (in dollars per share)		$ 0.19	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.17	$ 0.15	$ 0.15	$ 0.71	$ 0.62	$ 0.52
Diluted EPS (in dollars per share)		$ 0.19	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.17	$ 0.14	$ 0.15	$ 0.71	$ 0.62	$ 0.52
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Comprehensive Income_(Loss) (De

Comprehensive Income/(Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	$ (1,622)	$ (7,915)	$ 3,483
Other comprehensive (loss) income	(854)	6,293	(11,398)
Balance at the end of the period	(2,476)	(1,622)	(7,915)
Investment Securities Available-for-Sale
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	(1,733)	(8,332)	3,358
Other comprehensive (loss) income	(1,094)	6,599	(11,690)
Balance at the end of the period	(2,827)	(1,733)	(8,332)
Postretirement Benefits
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	111	417	125
Other comprehensive (loss) income	240	(306)	292
Balance at the end of the period	$ 351	$ 111	$ 417

Comprehensive Income_(Loss) (88

Comprehensive Income/(Loss) (Details 2) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes		$ (8,237)	$ (6,897)	$ (7,115)	$ (7,104)	$ (6,586)	$ (7,163)	$ (6,158)	$ (6,379)	$ (29,353)	[1]	$ (26,286)	[1]	$ (20,664)	[1]
Net income	[2]									49,782		43,288		36,015
Investment Securities Available-for-Sale | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on sales of securities,net										0		65		397
Provision for income taxes										0		(23)		(142)
Net income										$ 0		$ 42		$ 255
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Derivatives and Hedging Activ89

Derivatives and Hedging Activities (Details)	12 Months Ended
	Dec. 31, 2015USD ($)derivative	Dec. 31, 2014USD ($)derivative
Derivatives and Hedging Activities
Number of interest-rate swaps | derivative	64	22
Notional amount of interest-rate swaps	$ 490,632,000	$ 109,362,000
Asset Derivatives
Asset Derivatives	8,656,000	2,676,000
Liability Derivatives
Liability Derivatives	8,781,000	2,714,000
Loss Recognized in Income on Derivatives
Estimated net credit risk exposure	125,000	38,000
Collateral posted	14,700,000	5,400,000
Interest-rate products | Derivatives not designed as hedging instruments
Asset Derivatives
Asset Derivatives	8,656,000	2,676,000
Liability Derivatives
Liability Derivatives	8,781,000	2,714,000
Loss Recognized in Income on Derivatives
Gain (loss) recognized in income on derivatives	86,000	(8,000)
Interest Rate Swap [Member]
Derivatives and Hedging Activities
Notional amount of interest-rate swaps	$ 490,600,000	$ 109,400,000

Derivatives and Hedging Activ90

Derivatives and Hedging Activities (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Asset Derivatives
Gross Amounts Recognized, Assets	$ 8,656	$ 2,676
Net Amounts Presented in the Statement of Financial Position	8,656	2,676
Net Amount	8,656	2,676
Liability Derivatives
Gross Amounts Recognized, Liabilities	8,781	2,714
Net Amounts Presented in the Statement of Financial Position	8,781	2,714
Gross Amounts Not Offset in the Statement of Financial Position
Financial Instruments Pledged	9,873	4,173
Cash Collateral Pledged	4,790	1,180
Net Amount	$ 0	$ 0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Current provision:
Federal									$ 23,340		$ 20,862		$ 13,968
State									4,774		5,299		4,298
Total current provision									28,114		26,161		18,266
Deferred provision (benefit):
Federal									679		244		2,537
State									560		(119)		(139)
Total deferred provision									1,239		125		2,398
Total provision for income taxes	$ 8,237	$ 6,897	$ 7,115	$ 7,104	$ 6,586	$ 7,163	$ 6,158	$ 6,379	$ 29,353	[1]	$ 26,286	[1]	$ 20,664	[1]
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory U.S federal income tax rate (as a percent)									35.00%		35.00%		35.00%
Reconciliation of income tax expense
Expected income tax expense at statutory federal tax rate									$ 28,603		$ 25,049		$ 20,492
State taxes, net of federal income tax benefit									3,467		3,377		2,713
Bank-owned life insurance									(367)		(369)		(383)
Tax-exempt interest income									(622)		(341)		(310)
Income attributable to noncontrolling interest in subsidiary									(994)		(831)		(768)
Tax credit—premises and equipment									0		0		(453)
Tax credits from investments in affordable housing projects									(526)		(667)		(537)
Other, net									(208)		68		(90)
Total provision for income taxes	$ 8,237	$ 6,897	$ 7,115	$ 7,104	$ 6,586	$ 7,163	$ 6,158	$ 6,379	$ 29,353	[1]	$ 26,286	[1]	$ 20,664	[1]
Effective income tax rate (as a percent)									35.90%		36.70%		35.30%
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".

Income Taxes (Details 3)

Income Taxes (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Allowance for credit losses	$ 22,741,000	$ 21,770,000
Acquisition fair value adjustments	606,000	3,066,000
Unrealized loss on investment securities available-for-sale	1,577,000	1,086,000
Retirement and postretirement benefits	4,677,000	4,794,000
Deferred compensation	4,966,000	3,686,000
Net operating loss and contribution carryovers	1,335,000	1,614,000
Nonaccrual interest	352,000	814,000
Restricted stock and stock option plans	812,000	708,000
Accrued expenses	387,000	407,000
Alternative minimum tax credits	31,000	31,000
Other	103,000	63,000
Total gross deferred tax assets	37,587,000	38,039,000
Deferred tax liabilities:
Identified intangible assets and goodwill	5,392,000	6,311,000
Depreciation	2,957,000	2,740,000
Deferred loan origination costs, net	2,218,000	930,000
Unrecognized gain relating to postretirement obligation	203,000	70,000
Other	0	301,000
Total gross deferred tax liabilities	10,770,000	10,352,000
Net deferred tax asset	26,817,000	$ 27,687,000
Net operating loss carryforwards for U.S. federal income tax purposes	3,700,000
Alternative minimum tax credit carryforwards for U.S. federal income tax purpose	31,000
Net operating loss carryforwards and credit subject to annual limitation	900,000
Reserve for loan losses	$ 1,800,000
Percentage of the amount the used reserve for loan losses would be subject to taxation, if, the reserve is used for purposes other than to absorb the losses for which it was established	150.00%
Amount of liability that would result if 100% of the reserve were recaptured on which no provision has been made	$ 1,000,000
Reserve for loan losses recaptured (as a percent)	100.00%

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Authorized serial preferred stock		50,000,000
Serial preferred stock, par value (in dollars per share)		$ 0.01
Preferred stock issued		0
Number of shares repurchased		0	0	0
Stock repurchase program, authorized amount	$ 10
Stock repurchase program, period	14 months
Liquidation account, total		$ 16.6	$ 18.4	$ 20.6

Regulatory Capital Requiremen95

Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Bank actual capital amount
Common equity Tier 1 capital ratio, Actual, Amount	$ 530,505
Tier 1 leverage capital	545,035	$ 504,964
Risk-based capital:
Tier 1	545,035	504,964
Total risk-based capital	$ 676,709	$ 633,421
Bank actual capital ratio
Common equity Tier 1 capital ratio, Actual, Ratio (as a percent)	10.62%
Tier 1 leverage capital ratio (as a percent)	9.37%	9.01%
Risk-based capital:
Tier 1 (as a percent)	10.91%	10.55%
Total (as a percent)	13.54%	13.24%
Minimum capital adequacy amount
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Amount	$ 225,214
Tier 1 leverage capital	231,930	$ 224,179
Risk-based capital:
Tier 1	300,019	191,456
Total	$ 401,013	$ 382,732
Minimum capital adequacy ratio
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Ratio (as a percent)	4.50%
Tier 1 leverage capital ratio (as a percent)	4.00%	4.00%
Risk-based capital:
Tier 1 (as a percent)	6.00%	4.00%
Total (as a percent)	8.00%	8.00%
Classified as well capitalized ratio
Tier 1 leverage capital ratio (as a percent)	5.00%
Risk-based capital:
Tier 1 (as a percent)	8.00%
Total (as a percent)	10.00%
Brookline Bank
Bank actual capital amount
Common equity Tier 1 capital ratio, Actual, Amount	$ 374,002
Tier 1 leverage capital	380,003	$ 336,513
Risk-based capital:
Tier 1	380,003	336,513
Total risk-based capital	$ 417,270	$ 373,312
Bank actual capital ratio
Common equity Tier 1 capital ratio, Actual, Ratio (as a percent)	11.89%
Tier 1 leverage capital ratio (as a percent)	10.78%	9.60%
Risk-based capital:
Tier 1 (as a percent)	12.08%	10.72%
Total (as a percent)	13.27%	11.90%
Minimum capital adequacy amount
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Amount	$ 141,548
Tier 1 leverage capital	141,003	$ 140,214
Risk-based capital:
Tier 1	188,743	125,565
Total	$ 251,557	$ 250,966
Minimum capital adequacy ratio
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Ratio (as a percent)	4.50%
Tier 1 leverage capital ratio (as a percent)	4.00%	4.00%
Risk-based capital:
Tier 1 (as a percent)	6.00%	4.00%
Total (as a percent)	8.00%	8.00%
Classified as well capitalized
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Amount	$ 204,459
Tier 1 leverage capital	176,254	$ 175,267
Risk-based capital:
Tier 1	251,658	188,347
Total	$ 314,446	$ 313,708
Classified as well capitalized ratio
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Ratio (as a percent)	6.50%
Tier 1 leverage capital ratio (as a percent)		5.00%
Risk-based capital:
Tier 1 (as a percent)		6.00%
Total (as a percent)		10.00%
BankRI
Bank actual capital amount
Common equity Tier 1 capital ratio, Actual, Amount	$ 171,967
Tier 1 leverage capital	171,967	$ 150,403
Risk-based capital:
Tier 1	171,967	150,403
Total risk-based capital	$ 189,953	$ 166,135
Bank actual capital ratio
Common equity Tier 1 capital ratio, Actual, Ratio (as a percent)	10.63%
Tier 1 leverage capital ratio (as a percent)	8.51%	8.43%
Risk-based capital:
Tier 1 (as a percent)	10.63%	10.70%
Total (as a percent)	11.74%	11.82%
Minimum capital adequacy amount
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Amount	$ 72,799
Tier 1 leverage capital	80,831	$ 71,366
Risk-based capital:
Tier 1	97,065	56,225
Total	$ 129,440	$ 112,443
Minimum capital adequacy ratio
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Ratio (as a percent)	4.50%
Tier 1 leverage capital ratio (as a percent)	4.00%	4.00%
Risk-based capital:
Tier 1 (as a percent)	6.00%	4.00%
Total (as a percent)	8.00%	8.00%
Classified as well capitalized
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Amount	$ 105,154
Tier 1 leverage capital	101,038	$ 89,207
Risk-based capital:
Tier 1	129,420	84,338
Total	$ 161,800	$ 140,554
Classified as well capitalized ratio
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Ratio (as a percent)	6.50%
Tier 1 leverage capital ratio (as a percent)	5.00%	5.00%
Risk-based capital:
Tier 1 (as a percent)	8.00%	6.00%
Total (as a percent)	10.00%	10.00%
First Ipswich
Bank actual capital amount
Common equity Tier 1 capital ratio, Actual, Amount	$ 32,831
Tier 1 leverage capital	32,831	$ 29,962
Risk-based capital:
Tier 1	32,831	29,962
Total risk-based capital	$ 35,617	$ 32,375
Bank actual capital ratio
Common equity Tier 1 capital ratio, Actual, Ratio (as a percent)	13.87%
Tier 1 leverage capital ratio (as a percent)	9.26%	9.27%
Risk-based capital:
Tier 1 (as a percent)	13.87%	12.40%
Total (as a percent)	15.05%	13.40%
Minimum capital adequacy amount
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Amount	$ 10,652
Tier 1 leverage capital	14,182	$ 12,929
Risk-based capital:
Tier 1	14,202	9,665
Total	$ 18,933	$ 19,328
Minimum capital adequacy ratio
Common equity Tier 1 capital ratio, Minimum Required for Capital Adequacy Purposes, Ratio (as a percent)	4.50%
Tier 1 leverage capital ratio (as a percent)	4.00%	4.00%
Risk-based capital:
Tier 1 (as a percent)	6.00%	4.00%
Total (as a percent)	8.00%	8.00%
Classified as well capitalized
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Amount	$ 15,386
Tier 1 leverage capital	17,727	$ 16,161
Risk-based capital:
Tier 1	18,936	14,498
Total	$ 23,666	$ 24,160
Classified as well capitalized ratio
Common equity Tier 1 capital ratio, Minimum Required to Be Considered Well-Capitalized, Ratio (as a percent)	6.50%
Tier 1 leverage capital ratio (as a percent)	5.00%	5.00%
Risk-based capital:
Tier 1 (as a percent)	8.00%	6.00%
Total (as a percent)	10.00%	10.00%

Employee Benefit Plans (Details

Employee Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2015USD ($)yrplan	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Changes in postretirement benefit obligation recognized in other comprehensive income:
Total pre-tax changes in postretirement benefit obligation recognized in other comprehensive income	$ (353,000)	$ 498,000	$ (468,000)
401(k) Plans
Number of 401(k) plans administered | plan	1
Minimum employee age required to participate in the plan (in years) | yr	21
Expense for the company plan contributions	$ 2,300,000	2,400,000	2,000,000
Accrued liabilities with deferred compensation plan	$ 200,000	300,000	400,000
401(k) plan 1
401(k) Plans
Company contribution as percentage of compensation of eligible employees	5.00%
Health Insurance Postretirement Benefit
Net periodic benefit expense:
Service cost	$ 55,000	45,000	61,000
Interest cost	49,000	47,000	47,000
Prior service credit	(21,000)	(21,000)	(21,000)
Actuarial gain	(20,000)	(40,000)	(16,000)
Net periodic benefit expense	63,000	31,000	71,000
Changes in postretirement benefit obligation recognized in other comprehensive income:
Net actuarial loss (gain)	374,000	(477,000)	489,000
Prior service credit	(21,000)	(21,000)	(21,000)
Total pre-tax changes in postretirement benefit obligation recognized in other comprehensive income	$ 353,000	$ (498,000)	$ 468,000
Discount rate used to determine the actuarial present value of projected postretirement benefit obligations (as a percent)	4.35%	4.00%	4.90%
Estimated prior service credit that will be amortized from accumulated other comprehensive income into net periodic benefit cost	$ 54,000
Liability for the postretirement benefits included in accrued expenses and other liabilities	$ 1,200,000	$ 1,600,000
Assumed health care trend rates used in 2016 through 2020, high end of range (as a percent)	6.90%
Assumed health care trend rates used in 2016 through 2020, low end of range (as a percent)	5.90%
Assumed health care trend rate after 2020 (as a percent)	5.10%
Effect of 1% change in assumed health care cost trend rates
Effect of 1% increase on total service and interest cost components of net periodic postretirement benefit costs	$ 26,000
Effect of 1% decrease on total service and interest cost components of net periodic postretirement benefit costs	(24,000)
Effect of 1% increase on the accumulated postretirement benefit obligation	268,000
Effect of 1% decrease on the accumulated postretirement benefit obligation	$ (208,000)
Health Insurance Postretirement Benefit | Below age 65
Changes in postretirement benefit obligation recognized in other comprehensive income:
Actual health care trend that will be used to measure the accumulated postretirement benefit obligation (as a percent)	7.40%
Actual health care trend used to measure the accumulated postretirement benefit obligation (as a percent)		6.60%
Health Insurance Postretirement Benefit | Over age 65
Changes in postretirement benefit obligation recognized in other comprehensive income:
Actual health care trend that will be used to measure the accumulated postretirement benefit obligation (as a percent)	5.00%

Employee Benefit Plans (Detai97

Employee Benefit Plans (Details 2) - Supplemental retirement plan $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)participant	Dec. 31, 2014USD ($)
Supplemental Executive Retirement Agreements
Number of participants | participant	13
Expenses for benefits payable recognized under agreement	$ 0.1	$ 1.9
Aggregate benefits payable included in accrued expenses and other liabilities	$ 11.2	$ 11.6
Discount rate used to determine the actuarial present value (as a percent)	4.30%	4.00%

Employee Benefit Plans (Detai98

Employee Benefit Plans (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-Based Payment Arrangements
Unallocated shares	213,066	251,382
Unallocated shares, aggregate cost	$ 1,162	$ 1,370
Compensation and employee benefits expense	$ 395	496	$ 230
Employee Stock Ownership Plan
Share-Based Payment Arrangements
ESOP loan to purchase shares of entity's common stock	546,986
Number of years during which quarterly installments are payable	30 years
Percentage of interest payable per annum on loan obtained by the ESOP	8.50%
Outstanding balance of loan	$ 1,800	$ 2,000
Unallocated shares	213,066	251,382
Unallocated shares, aggregate cost	$ 1,100	$ 1,300
Unallocated shares, market value	2,500	2,500
Compensation and employee benefits expense	$ 400	$ 400	$ 400
Number of shares committed to be released to eligible employees	38,316	40,284	42,252

Employee Benefit Plans (Detai99

Employee Benefit Plans (Details 4)	12 Months Ended
	Dec. 31, 2015USD ($)plan$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans | plan	3
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid on unvested shares recognized as compensation expense | $	$ 100,000	$ 200,000	$ 30,000
Restricted Stock Awards Outstanding
Outstanding at beginning of year	419,702
Granted	247,790
Vested	(126,193)
Forfeited / Canceled	(55,264)
Outstanding at end of year	486,035	419,702
Weighted Average Grant Price per Share
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 9.17
Granted (in dollars per share) | $ / shares	11.36
Vested (in dollars per share) | $ / shares	9.02
Forfeited / Canceled (in dollars per share) | $ / shares	8.66
Outstanding at end of year (in dollars per share) | $ / shares	$ 10.37	$ 9.17
Unrecognized compensation cost | $	$ 3,045,000
Weighted average remaining recognition period	28 months
Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	1,750,000
Share-based compensation expense | $	$ 1,400,000	$ 1,200,000	1,200,000
Tax benefits from vested awards | $	$ 300,000	$ 400,000	$ 200,000
2003 RRP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	1,250,000
2011 Restricted Stock Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	500,000
Vesting equally over three years | Time-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years
Award vesting percentage	33.00%
Vesting after achievement of performance targets | Performance-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years

Employee Benefit Plans (Deta100

Employee Benefit Plans (Details 5) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock option activity
Outstanding at the beginning of the period (in shares)	227,345
Granted (in shares)	0	0	0
Exercised (in shares)	0
Forfeited/Canceled (in shares)	0
Outstanding at the end of the period (in shares)	227,345	227,345
Exercisable at the end of the period (in shares)	227,345
Stock Option Activity, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 10.43
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Forfeited/Canceled (in dollars per share)	0
Outstanding at the end of the period (in dollars per share)	10.43	$ 10.43
Exercisable at the end of the period (in dollars per share)	$ 10.43
Stock Option Activity, Aggregate Intrinsic Value
Outstanding at the end of the period	$ 0
Exercisable at the end of the period	$ 0
Stock Option Activity, Weighted Average Contractual Term
Outstanding at the end of the period (in years)	3 years 8 months 12 days
Exercisable at the end of the period (in years)	3 years 8 months 12 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable period upon happening of a specific event, low end of range (in months)	3 months
Exercisable period upon happening of a specific event, high end of range (in years)	5 years
Share-based compensation expense	$ 0	$ 0	$ 0
Dividend equivalent rights	$ 0	$ 0	$ 0

Fair Value of Financial Inst101

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Assets:
Investment securities available-for-sale	$ 513,201	$ 550,761
Interest-rate swaps	8,656	2,676
Liabilities:
Interest-rate swaps	$ 8,781	2,714
Changes in generic pricing of securities period one, considered for analyzing changes in prices obtained from pricing service (in years)	15 years
Changes in generic pricing of securities period two, considered for analyzing changes in prices obtained from pricing service (in years)	30 years
Recurring basis
Assets:
Interest-rate swaps	$ 8,656	2,676
Liabilities:
Interest-rate swaps	8,781	2,714
Recurring basis | Investment securities available for sale
Assets:
Investment securities available-for-sale	513,201	550,761
Recurring basis | Debt Securities
Assets:
Investment securities available-for-sale	512,224	549,788
Recurring basis | GSEs
Assets:
Investment securities available-for-sale	40,627	22,988
Recurring basis | GSE CMOs
Assets:
Investment securities available-for-sale	193,816	234,169
Recurring basis | GSE MBSs
Assets:
Investment securities available-for-sale	229,881	250,981
Recurring basis | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	147	203
Recurring basis | Corporate debt obligations
Assets:
Investment securities available-for-sale	46,486	40,207
Recurring basis | Trust preferred securities
Assets:
Investment securities available-for-sale	1,267	1,240
Recurring basis | Marketable equity securities
Assets:
Investment securities available-for-sale	977	973
Recurring basis | Level 1
Assets:
Interest-rate swaps	0	0
Liabilities:
Interest-rate swaps	0	0
Recurring basis | Level 1 | Investment securities available for sale
Assets:
Investment securities available-for-sale	977	973
Recurring basis | Level 1 | Debt Securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | GSEs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | GSE CMOs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | GSE MBSs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Corporate debt obligations
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Trust preferred securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Marketable equity securities
Assets:
Investment securities available-for-sale	977	973
Recurring basis | Level 2
Assets:
Interest-rate swaps	8,656	2,676
Liabilities:
Interest-rate swaps	8,781	2,714
Recurring basis | Level 2 | Investment securities available for sale
Assets:
Investment securities available-for-sale	512,224	549,788
Recurring basis | Level 2 | Debt Securities
Assets:
Investment securities available-for-sale	512,224	549,788
Recurring basis | Level 2 | GSEs
Assets:
Investment securities available-for-sale	40,627	22,988
Recurring basis | Level 2 | GSE CMOs
Assets:
Investment securities available-for-sale	193,816	234,169
Recurring basis | Level 2 | GSE MBSs
Assets:
Investment securities available-for-sale	229,881	250,981
Recurring basis | Level 2 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	147	203
Recurring basis | Level 2 | Corporate debt obligations
Assets:
Investment securities available-for-sale	46,486	40,207
Recurring basis | Level 2 | Trust preferred securities
Assets:
Investment securities available-for-sale	1,267	1,240
Recurring basis | Level 2 | Marketable equity securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3
Assets:
Interest-rate swaps	0	0
Liabilities:
Interest-rate swaps	0	0
Recurring basis | Level 3 | Investment securities available for sale
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Debt Securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSEs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSE CMOs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSE MBSs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Corporate debt obligations
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Trust preferred securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Marketable equity securities
Assets:
Investment securities available-for-sale	$ 0	$ 0

Fair Value of Financial Inst102

Fair Value of Financial Instruments (Details 2) - Investment securities available for sale - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of assets measured at fair value on a recurring basis
Investment securities available-for-sale, beginning of year	$ 0	$ 1,775	$ 2,917
Investment security sales	0	(1,658)	0
Principal paydowns and other	0	0	(1,150)
Total realized losses included in other income	0	(242)	0
Total unrealized gains included in other comprehensive income	0	125	8
Investment securities available-for-sale, end of year	$ 0	$ 0	$ 1,775

Fair Value of Financial Inst103

Fair Value of Financial Instruments (Details 3) - Nonrecurring basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	$ 13,480	$ 7,832
Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	614	503
Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	12,866	7,329
Collateral-dependent impaired loans and leases
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	12,137	6,376
Collateral-dependent impaired loans and leases | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Collateral-dependent impaired loans and leases | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Collateral-dependent impaired loans and leases | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	12,137	6,376
OREO
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	729	953
OREO | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
OREO | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
OREO | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	729	953
Repossessed assets
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	614	503
Repossessed assets | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Repossessed assets | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	614	503
Repossessed assets | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	$ 0	$ 0

Fair Value of Financial Inst104

Fair Value of Financial Instruments (Details 4) - Level 3 - Recurring basis - Appraisal of collateral - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Collateral-dependent impaired loans and leases
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$ 12,137	$ 6,376
Other real estate owned
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$ 729	$ 953

Fair Value of Financial Inst105

Fair Value of Financial Instruments (Details 5) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financial assets:
Investment securities held-to-maturity:	$ 93,695	$ 500
Loans and leases, net	4,938,801	4,768,948
Financial liabilities:
Certificates of deposit	1,087,872	946,708
Borrowed funds	38,227	39,615
Level 1
Financial assets:
Investment securities held-to-maturity:		0
Loans held-for-sale	0	0
Loans and leases, net	0	0
Financial liabilities:
Certificates of deposit	0	0
Borrowed funds	0	0
Level 2
Financial assets:
Investment securities held-to-maturity:		0
Loans held-for-sale	13,383	1,537
Loans and leases, net	0	0
Financial liabilities:
Certificates of deposit	1,091,906	949,320
Borrowed funds	981,349	1,132,940
Level 3
Financial assets:
Investment securities held-to-maturity:		500
Loans held-for-sale	0	0
Loans and leases, net	4,857,060	4,753,605
Financial liabilities:
Certificates of deposit	0	0
Borrowed funds	0	0
Carrying Value
Financial assets:
Investment securities held-to-maturity:		500
Loans held-for-sale	13,383	1,537
Loans and leases, net	4,938,801	4,768,948
Financial liabilities:
Certificates of deposit	1,087,872	946,708
Borrowed funds	983,029	1,126,404
Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:		500
Loans held-for-sale	13,383	1,537
Loans and leases, net	4,857,060	4,753,605
Financial liabilities:
Certificates of deposit	1,091,906	949,320
Borrowed funds	981,349	1,132,940
GSE
Financial assets:
Investment securities held-to-maturity:	34,819
GSE | Level 1
Financial assets:
Investment securities held-to-maturity:	0
GSE | Level 2
Financial assets:
Investment securities held-to-maturity:	34,819
GSE | Level 3
Financial assets:
Investment securities held-to-maturity:	0
GSE | Carrying Value
Financial assets:
Investment securities held-to-maturity:	34,915
GSE | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	34,819
GSE MBSs
Financial assets:
Investment securities held-to-maturity:	18,986
GSE MBSs | Level 1
Financial assets:
Investment securities held-to-maturity:	0
GSE MBSs | Level 2
Financial assets:
Investment securities held-to-maturity:	18,986
GSE MBSs | Level 3
Financial assets:
Investment securities held-to-maturity:	0
GSE MBSs | Carrying Value
Financial assets:
Investment securities held-to-maturity:	19,291
GSE MBSs | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	18,986
Municipal Obligations
Financial assets:
Investment securities held-to-maturity:	39,390
Municipal Obligations | Level 1
Financial assets:
Investment securities held-to-maturity:	0
Municipal Obligations | Level 2
Financial assets:
Investment securities held-to-maturity:	39,390
Municipal Obligations | Level 3
Financial assets:
Investment securities held-to-maturity:	0
Municipal Obligations | Carrying Value
Financial assets:
Investment securities held-to-maturity:	39,051
Municipal Obligations | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	39,390
Foreign Government Obligations
Financial assets:
Investment securities held-to-maturity:	500	$ 500
Foreign Government Obligations | Level 1
Financial assets:
Investment securities held-to-maturity:	0
Foreign Government Obligations | Level 2
Financial assets:
Investment securities held-to-maturity:	0
Foreign Government Obligations | Level 3
Financial assets:
Investment securities held-to-maturity:	500
Foreign Government Obligations | Carrying Value
Financial assets:
Investment securities held-to-maturity:	500
Foreign Government Obligations | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	$ 500

Condensed Parent Company Fin106

Condensed Parent Company Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks																$ 28,753	$ 36,893
Short-term investments																46,736	25,830
Total cash and cash equivalents		$ 75,489			$ 62,723	$ 62,723			$ 92,505	$ 62,723		$ 92,505		$ 117,097		75,489	62,723	$ 92,505	$ 117,097
Restricted equity securities																66,117	74,804
Premises and equipment, net																78,156	80,619
Goodwill																137,890	137,890	137,890	137,890
Other assets	[1]															86,751	80,479
Total assets																6,042,338	5,800,948
LIABILITIES AND STOCKHOLDERS' EQUITY
Borrowed funds																983,029	1,126,404
Accrued expenses and other liabilities																72,289	61,332
Total liabilities																5,368,852	5,154,343
Stockholders' equity
Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued																$ 757	$ 757
Common stock, par value (in dollars per share)																$ 0.01	$ 0.01
Common stock, shares authorized																200,000,000	200,000,000
Common stock, shares issued																75,744,445	75,744,445
Additional paid-in capital																$ 616,899	$ 617,475
Retained earnings, partially restricted	[1]															109,675	84,860
Accumulated other comprehensive loss																(2,476)	(1,622)	(7,915)	3,483
Treasury stock, at cost; 4,861,554 shares and 5,040,571 shares, respectively																$ (56,208)	$ (58,282)
Treasury stock, shares																4,861,554	5,040,571
Unallocated common stock held by Employee Stock Ownership Plan (ESOP); 213,066 shares and 251,382 shares, respectively																$ (1,162)	$ (1,370)
Unallocated common stock held by ESOP, shares																213,066	251,382
Total Brookline Bancorp, Inc. stockholders' equity	[1]															$ 667,485	$ 641,818
Total liabilities and stockholders' equity	[1]															6,042,338	5,800,948
Interest and dividend income:
Marketable and restricted equity securities										2,762		2,072		1,212
Total interest and dividend income		58,448	$ 56,687	$ 55,166	56,609	55,826	$ 54,616	$ 53,346	54,694	226,910		218,482		206,384
Interest expense:
Net interest income		50,078	48,587	47,172	48,528	47,576	47,324	46,434	47,734	194,365		189,068		176,218
Non-interest income:
Other										4,663		6,314		4,841
Total non-interest income	[2]									20,184		20,180		15,619
Non-interest expense:
Compensation and employee benefits										71,272		71,801		65,261
Occupancy										13,926		14,294		12,616
Equipment and data processing										14,837		17,020		16,899
Professional services										4,192		5,357		5,673
Other		31,605	30,545	29,728	30,588	31,628	31,086	30,388	32,715	11,377		10,925		11,265
Total non-interest expense										125,377		129,160		122,442
Credit for income taxes		8,237	6,897	7,115	7,104	6,586	7,163	6,158	6,379	29,353	[2]	26,286	[2]	20,664	[2]
Net income attributable to Brookline Bancorp, Inc.		13,327	12,888	11,865	11,703	10,875	11,740	10,131	10,542	49,782	[2],[3]	43,288	[2],[3]	36,015	[2],[3]
Statement of Cash Flows
Net income attributable to Brookline Bancorp, Inc.		13,327	$ 12,888	$ 11,865	11,703	10,875	$ 11,740	$ 10,131	10,542	49,782	[2],[3]	43,288	[2],[3]	36,015	[2],[3]
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation of premises and equipment										7,074		7,020		6,291
Amortization of debt issuance costs										100		29		0
Net cash provided from (used for) operating activities	[3],[4]									64,604		84,287		74,017
Cash flows from investing activities:
Purchase of premises and equipment										(4,775)		(7,782)		(16,443)
Net cash used for investing activities	[4]									(231,820)		(529,156)		(254,805)
Cash flows from financing activities:
Decrease in demand deposit, NOW, savings and money market accounts										206,748		111,060		295,020
Proceeds from issuance of subordinated notes										0		73,495		0
Payment of dividends on common stock										(24,967)		(23,876)		(23,841)
Net cash (used for) provided from used for financing activities										179,982		415,087		156,196
Cash and cash equivalents at beginning of year					62,723				92,505	62,723		92,505		117,097
Cash and cash equivalents at end of year		75,489				62,723				75,489		62,723		92,505
Parent Company
ASSETS
Cash and due from banks																590	3,293
Short-term investments																27,513	49,008
Total cash and cash equivalents		28,103			52,301	52,301			12,471	52,301		12,471		4,580		28,103	52,301	$ 12,471	$ 4,580
ESOP loan to Brookline Bank																1,752	2,002
Restricted equity securities																100	100
Premises and equipment, net																9,040	11,026
Investment in subsidiaries, at equity																681,504	628,531
Goodwill																35,267	35,267
Other assets																2,631	4,366
Total assets																758,397	733,593
LIABILITIES AND STOCKHOLDERS' EQUITY
Borrowed funds																82,936	82,745
Deferred tax liability																435	721
Accrued expenses and other liabilities																7,541	8,309
Total liabilities																90,912	91,775
Stockholders' equity
Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued																$ 757	$ 757
Common stock, par value (in dollars per share)																$ 0.01	$ 0.01
Common stock, shares authorized																200,000,000	200,000,000
Common stock, shares issued																75,744,445	75,744,445
Additional paid-in capital																$ 616,899	$ 617,475
Retained earnings, partially restricted																109,675	84,860
Accumulated other comprehensive loss																(2,476)	(1,622)
Treasury stock, at cost; 4,861,554 shares and 5,040,571 shares, respectively																$ (56,208)	$ (58,282)
Treasury stock, shares																4,861,554	5,040,571
Unallocated common stock held by Employee Stock Ownership Plan (ESOP); 213,066 shares and 251,382 shares, respectively																$ (1,162)	$ (1,370)
Unallocated common stock held by ESOP, shares																213,066	251,382
Total Brookline Bancorp, Inc. stockholders' equity																$ 667,485	$ 641,818
Total liabilities and stockholders' equity																$ 758,397	$ 733,593
Interest and dividend income:
Dividend income from subsidiaries										0		24,700		30,000
Marketable and restricted equity securities										97		0		0
ESOP loan to Brookline Bank										162		183		205
Total interest and dividend income										259		24,883		30,205
Interest expense:
Borrowed funds										5,063		1,746		442
Net interest income										(4,804)		23,137		29,763
Non-interest income:
Other										5		0		0
Total non-interest income										5		0		0
Non-interest expense:
Compensation and employee benefits										205		2,357		2,305
Occupancy										22		38		16
Equipment and data processing										687		1,499		4,263
Directors' fees										688		656		590
Franchise taxes										113		252		223
Insurance										490		472		352
Professional services										185		(113)		583
Other										(1,289)		751		2,040
Total non-interest expense										1,101		5,912		10,372
Income before income taxes										(5,900)		17,225		19,391
Credit for income taxes										(1,854)		(2,705)		(4,035)
Income before equity in undistributed income of subsidiaries										(4,046)		19,930		23,426
Equity in undistributed income of subsidiaries										53,828		23,358		12,589
Net income attributable to Brookline Bancorp, Inc.										49,782		43,288		36,015
Statement of Cash Flows
Net income attributable to Brookline Bancorp, Inc.										49,782		43,288		36,015
Adjustments to reconcile net income to net cash provided from operating activities:
Equity in undistributed income of subsidiaries										(53,828)		(23,358)		(12,589)
Depreciation of premises and equipment										2,728		2,563		1,810
Amortization of debt issuance costs										100		29		0
Other operating activities, net										2,479		(30,822)		14,745
Net cash provided from (used for) operating activities										1,261		(8,300)		39,981
Cash flows from investing activities:
Repayment of ESOP loan by Brookline Bank										250		250		250
Purchase of premises and equipment										(742)		(1,739)		(5,458)
Net cash used for investing activities										(492)		(1,489)		(5,208)
Cash flows from financing activities:
Decrease in demand deposit, NOW, savings and money market accounts										0		0		(41)
Proceeds from issuance of subordinated notes										0		73,495		0
Repayment of subordinated debentures										0		0		(3,000)
Payment of dividends on common stock										(24,967)		(23,876)		(23,841)
Net cash (used for) provided from used for financing activities										(24,967)		49,619		(26,882)
Net (decrease) increase in cash and cash equivalents										(24,198)		39,830		7,891
Cash and cash equivalents at beginning of year					$ 52,301				$ 12,471	52,301		12,471		4,580
Cash and cash equivalents at end of year		$ 28,103				$ 52,301				$ 28,103		$ 52,301		$ 12,471
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[4]	Cash flows resulting from the sales of OREO and other repossessed assets which had been recorded as cash flows from operating activities in prior filings have been revised to cash flows from investing activities in 2015 to properly reflect the cash flow activity. There is no impact to the Company's net income or related per share amounts for the year ended December 31, 2015, 2014, and 2013.

Quarterly Results of Operati107

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Interest and dividend income	$ 58,448	$ 56,687	$ 55,166	$ 56,609	$ 55,826	$ 54,616	$ 53,346	$ 54,694	$ 226,910		$ 218,482		$ 206,384
Interest expense	8,370	8,100	7,994	8,081	8,250	7,292	6,912	6,960	32,545		29,414		30,166
Net interest income	50,078	48,587	47,172	48,528	47,576	47,324	46,434	47,734	194,365		189,068		176,218
Provision for credit losses	1,520	1,755	1,913	2,263	1,724	2,034	2,276	2,443	7,451		8,477		10,929
Net interest income after provision for credit losses	48,558	46,832	45,259	46,265	45,852	45,290	44,158	45,291	186,914		180,591		165,289
Loan level derivative income	1,556	900	941	0	562	322	62	0	3,397		946		0
Gain on sales of investment securities, net					78	0	(13)	0	0		65		397
Gain on sales of loans and leases held-for-sale	614	446	279	869	368	564	92	627	2,208		1,651		794
Other non-interest income	3,893	3,438	3,647	3,601	3,533	5,303	3,681	5,001
Amortization of identified intangible assets	(724)	(725)	(724)	(738)	(827)	(828)	(827)	(861)	(2,911)		(3,343)		(4,623)
Other non-interest expense	(31,605)	(30,545)	(29,728)	(30,588)	(31,628)	(31,086)	(30,388)	(32,715)	(11,377)		(10,925)		(11,265)
Income before provision for income taxes	22,292	20,346	19,674	19,409	17,938	19,565	16,765	17,343	81,721	[1]	71,611	[1]	58,466	[1]
Provision for income taxes	8,237	6,897	7,115	7,104	6,586	7,163	6,158	6,379	29,353	[1]	26,286	[1]	20,664	[1]
Net income before noncontrolling interest in subsidiary	14,055	13,449	12,559	12,305	11,352	12,402	10,607	10,964	52,368	[1],[2]	45,325	[1],[2]	37,802	[1],[2]
Less net income attributable to noncontrolling interest in subsidiary	728	561	694	602	477	662	476	422	2,586	[3]	2,037	[3]	1,787	[3]
Net income attributable to Brookline Bancorp, Inc.	$ 13,327	$ 12,888	$ 11,865	$ 11,703	$ 10,875	$ 11,740	$ 10,131	$ 10,542	$ 49,782	[1],[4]	$ 43,288	[1],[4]	$ 36,015	[1],[4]
Earnings per share:
Basic (in dollars per share)	$ 0.19	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.17	$ 0.15	$ 0.15	$ 0.71		$ 0.62		$ 0.52
Diluted (in dollars per share)	$ 0.19	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.17	$ 0.14	$ 0.15	$ 0.71		$ 0.62		$ 0.52
Average common shares outstanding:
Basic (in shares)	70,177,382	70,129,056	70,049,829	70,036,090	70,024,495	69,989,909	69,886,576	69,875,473	70,098,561		69,945,028		69,808,164
Diluted (in shares)	70,318,657	70,240,020	70,215,850	70,164,105	70,130,243	70,088,987	70,012,377	69,983,999	70,235,868		70,054,815		69,883,924
Common stock price:
High (in dollars per share)	$ 11.89	$ 11.66	$ 11.54	$ 10.05	$ 10.15	$ 9.51	$ 9.63	$ 9.70
Low (in dollars per share)	10.19	10.09	10.1	9.29	8.56	8.55	8.83	8.66
Dividends paid:
Dividends per share (in dollars per share)	$ 0.090	$ 0.090	$ 0.090	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.085
[1]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[2]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[3]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".
[4]	Previously reported amounts prior to January 1, 2015 have been restated to reflect a retrospective change in accounting principle for investments in qualified affordable housing projects, in accordance with ASU 2014-01. Refer to Note 10, "Other Assets".