Brookline Bancorp (BRKL) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	11-May-15
Document and Entity Information
Entity Registrant Name	BROOKLINE BANCORP INC
Entity Central Index Key	1049782
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		70,049,670

Unaudited_Consolidated_Balance

Unaudited Consolidated Balance Sheets (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$35,118		$36,893
Short-term investments	162,003		25,830
Total cash and cash equivalents	197,121		62,723
Investment securities available-for-sale	565,115		550,761
Investment securities held-to-maturity (fair value of $500)	500		500
Total investment securities	565,615		551,261
Loans and leases held-for-sale	787		1,537
Total loans and leases	4,634,594		4,822,607
Allowance for loan and lease losses	-55,106		-53,659
Net loans and leases	4,579,488		4,768,948
Restricted equity securities	74,804		74,804
Premises and equipment, net of accumulated depreciation of $46,460 and $44,668, respectively	79,252		80,619
Deferred tax asset	25,834		27,687
Goodwill	137,890		137,890
Identified intangible assets, net of accumulated amortization of $26,976 and $26,238, respectively	12,806		13,544
Other real estate owned (OREO) and repossessed assets, net	2,023		1,456
Other assets	79,526	[1]	80,479	[1]
Total assets	5,755,146	[1]	5,800,948	[1]
Non-interest-bearing deposits:
Demand checking accounts	729,932		726,118
Interest-bearing deposits:
NOW accounts	237,200		235,063
Savings accounts	571,030		531,727
Money market accounts	1,525,053		1,518,490
Certificate of deposit accounts	1,051,580		946,708
Total interest-bearing deposits	3,384,863		3,231,988
Total deposits	4,114,795		3,958,106
Borrowed funds:
Advances from the Federal Home Loan Bank of Boston (FHLBB)	806,491		1,004,026
Subordinated debentures and notes	82,806		82,763
Other borrowed funds	35,628		39,615
Total borrowed funds	924,925		1,126,404
Mortgagors’ escrow accounts	8,414		8,501
Accrued expenses and other liabilities	51,046		61,332
Total liabilities	5,099,180		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	617,845		617,475
Retained earnings, partially restricted	90,589	[1]	84,860	[1]
Accumulated other comprehensive income (loss)	1,747		-1,622
Treasury stock, at cost; 5,042,238 shares and 5,040,571 shares, respectively	-58,301		-58,282
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP); 241,803 shares and 251,382 shares, respectively	-1,318		-1,370
Total Brookline Bancorp, Inc. stockholders’ equity	651,319	[1]	641,818	[1]
Noncontrolling interest in subsidiary	4,647		4,787
Total stockholders' equity	655,966	[1]	646,605	[1]
Total liabilities and stockholders' equity	5,755,146	[1]	5,800,948	[1]
Commercial real estate loans
ASSETS
Total loans and leases	2,500,887		2,467,801
Allowance for loan and lease losses	-29,460		-29,594
Commercial loans
ASSETS
Total loans and leases	1,227,352		1,167,094
Allowance for loan and lease losses	-19,084		-15,957
Indirect automobile
ASSETS
Total loans and leases	23,335		316,987
Allowance for loan and lease losses	-458		-2,331
Consumer loans
ASSETS
Total loans and leases	883,020		870,725
Allowance for loan and lease losses	($3,619)		($3,359)
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Unaudited_Consolidated_Balance1

Unaudited Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Investment securities held-to-maturity	$500	$500
Premises and equipment, accumulated depreciation and amortization	46,460	44,668
Identified intangible assets, accumulated amortization	$26,976	$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	5,042,238	5,040,571
Unallocated common stock held by ESOP, shares	241,803	251,382

Unaudited_Consolidated_Stateme

Unaudited Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Interest and dividend income:
Loans and leases	$53,381		$51,942
Debt securities	2,683		2,259
Marketable and restricted equity securities	524		449
Short-term investments	21		44
Total interest and dividend income	56,609		54,694
Interest expense:
Deposits	4,304		4,291
Borrowed funds	3,777		2,669
Total interest expense	8,081		6,960
Net interest income	48,528		47,734
Provision for credit losses	2,263		2,443
Net interest income after provision for credit losses	46,265		45,291
Non-interest income:
Deposit fees	2,066		1,959
Loan fees	342		434
Gain on sales of loans and leases held-for-sale	869		602
Gain on sale/disposals of premises and equipment, net	0		1,510
Other	1,193		1,123
Total non-interest income	4,470	[1]	5,628	[1]
Non-interest expense:
Compensation and employee benefits	17,524		18,032
Occupancy	3,472		4,405
Equipment and data processing	4,020		4,377
Professional services	1,094		1,727
FDIC insurance	867		860
Advertising and marketing	748		665
Amortization of identified intangible assets	738		861
Other	2,863	[1]	2,649	[1]
Total non-interest expense	31,326	[1]	33,576	[1]
Income before provision for income taxes	19,409	[1]	17,343	[1]
Provision for income taxes	7,104	[1]	6,379	[1]
Net income before noncontrolling interest in subsidiary	12,305	[1]	10,964	[1]
Less net income attributable to noncontrolling interest in subsidiary	602	[1]	422	[1]
Net income attributable to Brookline Bancorp, Inc.	$11,703	[1]	$10,542	[1]
Earnings per common share:
Basic (in dollars per share)	$0.17	[1]	$0.15	[1]
Diluted (in dollars per share)	$0.17	[1]	$0.15	[1]
Weighted average common shares outstanding during the period:
Basic (in shares)	70,036,090		69,875,473
Diluted (in shares)	70,164,105		69,983,999
Dividends declared per common share	$0.09		$0.09
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Unaudited_Consolidated_Stateme1

Unaudited Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interest in subsidiary	$12,305	[1]	$10,964	[1]
Investment securities available-for-sale:
Unrealized securities holding gains	5,371		3,293
Income tax expense	-2,002		-1,262
Net unrealized securities holding gains	3,369		2,031
Postretirement benefits:
Adjustment of accumulated obligation for postretirement benefits	0		-85
Income tax benefit	0		33
Net adjustment of accumulated obligation for postretirement benefits	0		-52
Other comprehensive income, net of taxes	3,369	[1]	1,979	[1]
Comprehensive income	15,674	[1]	12,943	[1]
Net income attributable to noncontrolling interest in subsidiary	602		422
Comprehensive income attributable to Brookline Bancorp, Inc.	$15,072	[1]	$12,521	[1]
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Unaudited_Consolidated_Stateme2

Unaudited Consolidated Statements of Changes in Equity (USD $)		Total		Total Brookline Bancorp, Inc. Stockholders' Equity		Common Stock	Additional Paid-in Capital	Retained Earnings		Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Unallocated Common Stock Held by ESOP	Noncontrolling Interest in Subsidiary
In Thousands, unless otherwise specified
Balance at Dec. 31, 2013		$618,716	[1]	$614,412	[1]	$757	$617,538	$65,448	[1]	($7,915)	($59,826)	($1,590)	$4,304
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	[1]	10,542		10,542				10,542
Net income attributable to noncontrolling interest in subsidiary		422	[1]										422
Other comprehensive income (loss)		1,979	[1]	1,979	[1]					1,979
Common stock dividends	[1]	-5,964		-5,964				-5,964
Dividend to owners of noncontrolling interest in subsidiary		-805	[1]										-805
Compensation under recognition and retention plans		401	[1]	401	[1]		401
Common stock held by ESOP committed to be released		94	[1]	94	[1]		39					55
Balance at Mar. 31, 2014		625,385	[1]	621,464	[1]	757	617,978	70,026	[1]	-5,936	-59,826	-1,535	3,921
Balance at Dec. 31, 2014		646,605	[1]	641,818	[1]	757	617,475	84,860	[1]	-1,622	-58,282	-1,370	4,787
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	[1]	11,703		11,703				11,703
Net income attributable to noncontrolling interest in subsidiary		602	[1]										602
Other comprehensive income (loss)		3,369	[1]	3,369	[1]					3,369
Common stock dividends	[1]	-5,974		-5,974				-5,974
Dividend to owners of noncontrolling interest in subsidiary		-742	[1]										-742
Compensation under recognition and retention plans		310	[1]	310	[1]		329				-19
Common stock held by ESOP committed to be released		93	[1]	93	[1]		41				0	52
Balance at Mar. 31, 2015		$655,966	[1]	$651,319	[1]	$757	$617,845	$90,589	[1]	$1,747	($58,301)	($1,318)	$4,647
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Unaudited_Consolidated_Stateme3

Unaudited Consolidated Statements of Changes in Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Common stock dividends, per share (in dollars per share)	$0.09	$0.09
Common stock held by ESOP committed to be released, shares	9,579	10,071

Unaudited_Consolidated_Stateme4

Unaudited Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Cash flows from operating activities:
Net income attributable to Brookline Bancorp, Inc.	$11,703	[1]	$10,542	[1]
Adjustments to reconcile net income to net cash provided from operating activities:
Net income attributable to noncontrolling interest in subsidiary	602	[1]	422	[1]
Provision for credit losses	2,263		2,443
Origination of loans and leases held-for-sale	-5,185		-652
Proceeds from loans and leases held-for-sale, net	273,446		14,449
Proceeds from sales of other real estate owned and repossessed assets	2,647		3,879
Deferred income tax (benefit) expense	-149		1,261
Depreciation of premises and equipment	1,792		1,670
Amortization of investment securities premiums and discounts, net	509		698
Amortization of deferred loan and lease origination costs, net	1,860		2,439
Amortization of identified intangible assets	738		861
Amortization of debt issuance costs	25		0
Accretion of acquisition fair value adjustments, net	-1,875		-4,841
Gain on sales of loans and leases held-for-sale	-869		-602
Gain on sales of OREO and repossessed assets, net	0		-16
Write-down of OREO and repossessed assets	38		111
Gain on sale/disposals of premises and equipment, net	0		-1,510
Compensation under recognition and retention plans	366		401
ESOP shares committed to be released	93		94
Net change in:
Cash surrender value of bank-owned life insurance	-263		-258
Other assets	1,216	[1]	3,373	[1]
Accrued expenses and other liabilities	-10,525		-5,893
Net cash provided from operating activities	278,432	[1]	28,871	[1]
Cash flows from investing activities:
Proceeds from maturities, calls and principal repayments of investment securities available-for-sale	19,974		16,466
Purchases of investment securities available-for-sale	-29,466		-48,516
Proceeds from maturities, calls, and principal repayments of investment securities held-to-maturity	0		500
Purchases of investment securities held-to-maturity	0		-500
Net increase in loans and leases	-83,175		-102,081
Proceeds from sales of premises and equipment	0		1,972
Purchase of premises and equipment, net	-466		-3,069
Net cash used for investing activities	-93,133		-135,228
Cash flows from financing activities:
Increase in demand checking, NOW, savings and money market accounts	51,817		29,539
Increase/(decrease) in certificates of deposit	104,915		-16,961
Proceeds from FHLBB advances	1,587,500		594,501
Repayment of FHLBB advances	-1,784,343		-506,629
Decrease in other borrowed funds, net	-3,987		-7,700
(Decrease)/increase in mortgagors’ escrow accounts, net	-87		807
Payment of dividends on common stock	-5,974		-5,964
Payment of dividends to owners of noncontrolling interest in subsidiary	-742		-805
Net cash (used for)/provided from financing activities	-50,901		86,788
Net increase/(decrease) in cash and cash equivalents	134,398		-19,569
Cash and cash equivalents at beginning of period	62,723		92,505
Cash and cash equivalents at end of period	197,121		72,936
Cash paid during the period for:
Interest on deposits, borrowed funds and subordinated debt	9,996		7,747
Income taxes	3,216		599
Non-cash investing activities:
Transfer from loans and leases to loans and leases held-for-sale	266,421		0
Transfer from loans to other real estate owned	$3,252		$3,686
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 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” and formerly known as the First National Bank of Ipswich), a Massachusetts-chartered savings bank (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 84.7%-owned subsidiary, Eastern Funding LLC (“Eastern Funding”), operates 24 full-service banking offices in the greater Boston metropolitan area. BankRI, which includes its wholly-owned subsidiaries BRI Investment Corp., Macrolease Corporation (“Macrolease”), Acorn Insurance Agency, BRI Realty Corp. and BRI MSC Corp., operates 19 full-service banking offices in the greater Providence area. First Ipswich, which includes its wholly-owned subsidiaries First Ipswich Securities II Corp. and First Ipswich Insurance Agency, 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 banks, Brookline Bank and First Ipswich 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 bank, BankRI is also 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 three Banks. As FDIC-insured depository institutions, all three 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 unaudited consolidated financial statements of the Company presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP”). In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2014.
	The unaudited 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 and leases, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowances.
	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, which did not change stockholders' equity and net income reported.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	During the quarter ended March 31, 2015, the Financial Accounting Standards Board (“FASB”) issued no new Accounting Standards Updates ("ASUs") that were applicable to the Company. Refer to page F-20 of the Company's Annual Report on Form 10-K for the year ended December 31, 2014 for applicable ASUs issued in 2014.
	The Company adopted ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects, which required retrospective application. Refer to Note 8, "Investments in Qualified Affordable Projects" for the impact the adoption had on the Company's financial statements.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 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 March 31, 2015
		Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair Value
				Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	22,890	$	363	$	—		$	23,253
	GSE CMOs	229,591		342		2,090			227,843
	GSE MBSs	267,648		3,783		397			271,034
	SBA commercial loan asset-backed securities	199		—		2			197
	Corporate debt obligations	39,829		712		—			40,541
	Trust preferred securities	1,464		—		202			1,262
	Total debt securities	561,621		5,200		2,691			564,130
	Marketable equity securities	950		35		—			985
	Total investment securities available-for-sale	$	562,571	$	5,235	$	2,691		$	565,115
	Investment securities held-to-maturity	$	500	$	—	$	—		$	500
		At December 31, 2014
		Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair Value
				Gains		Losses
		(In Thousands)
	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	$	500	$	—	$	—		$	500
	At March 31, 2015, the fair value of all investment securities available-for-sale was $565.1 million, with net unrealized gains of $2.5 million, compared to a fair value of $550.8 million and net unrealized losses of $2.8 million at December 31, 2014. At March 31, 2015, $194.0 million, or 34.3% of the portfolio, had gross unrealized losses of $2.7 million, compared to $335.7 million, or 60.9%, with gross unrealized losses of $6.0 million at December 31, 2014.
	Investment Securities as Collateral
	At March 31, 2015 and December 31, 2014, respectively, $483.9 million and $473.1 million of investment securities available-for-sale were pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; and FHLBB borrowings.
	Other-Than-Temporary Impairment (“OTTI”)
	Investment securities at March 31, 2015 and December 31, 2014 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:
		At March 31, 2015
		Less than Twelve Months				Twelve Months or Longer						Total
		Estimated		Unrealized		Estimated			Unrealized			Estimated			Unrealized
		Fair Value		Losses		Fair Value			Losses			Fair Value			Losses
		(In Thousands)
	Investment securities:
	GSE CMOs	$	40,851	$	160	$	116,877		$	1,930		$	157,728		$	2,090
	GSE MBSs	15,485		45		19,319			352			34,804			397
	SBA commercial loan asset-backed securities	7		—		180			2			187			2
	Trust preferred securities	—		—		1,262			202			1,262			202
	Total temporarily impaired investment securities	$	56,343	$	205	$	137,638		$	2,486		$	193,981		$	2,691
		At December 31, 2014
		Less than Twelve Months				Twelve Months or Longer						Total
		Estimated		Unrealized		Estimated			Unrealized			Estimated			Unrealized
		Fair Value		Losses		Fair Value			Losses			Fair Value			Losses
		(In Thousands)
	Investment securities:
	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	—		—		1,240			223			1,240			223
	Total temporarily impaired investment securities	$	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 unaudited consolidated statements 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 investment security will be recognized in the Company's unaudited consolidated statements of income.
At March 31, 2015, 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 at March 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.
Debt Securities
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. At March 31, 2015, only GNMA MBSs and CMOs, and Small Business Administration (“SBA”) commercial loan asset-backed securities with an estimated fair value of $25.4 million were backed explicitly by the full faith and credit of the U.S. Government, compared to $26.2 million at December 31, 2014.
At March 31, 2015, the Company held GSE debentures with a total fair value of $23.3 million and a net unrealized gain of $0.4 million. At December 31, 2014, the Company held GSE debentures with a total fair value of $23.0 million which approximated amortized cost. At March 31, 2015, none of the eight securities in this portfolio were in unrealized loss positions. At 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.
At March 31, 2015, the Company held GSE mortgage-related securities with a total fair value of $498.9 million and a net unrealized gain of $1.6 million. This compares to a total fair value of $485.2 million and a net unrealized loss of $3.1 million at December 31, 2014. At March 31, 2015, 53 of the 257 securities in this portfolio were in unrealized loss positions, compared to 79 of the 250 securities at December 31, 2014. All securities are performing and backed by the implicit (FHLB / FNMA / FHLMC) or explicit (GNMA) guarantee of the U.S. Government. During the three months ended March 31, 2015, the Company purchased $29.5 million in GSE CMOs and GSE MBSs. This compares to a total of $36.5 million during the same period in 2014.
SBA Commercial Loan Asset-Backed Securities
At March 31, 2015 and December 31, 2014, the Company held eight SBA securities with a total fair value of $0.2 million which approximated amortized cost. At March 31, 2015 and 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 will invest in high-quality corporate obligations to provide portfolio diversification and improve the overall yield on the portfolio. The Company owned thirteen corporate obligation securities with a total fair value of $40.5 million and a net unrealized gain of $0.7 million at March 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 at December 31, 2014. At March 31, 2015, none of the thirteen securities in this portfolio were in unrealized loss positions. At December 31, 2014, one of the thirteen securities in this portfolio is in unrealized loss position. Full collection of the obligations is expected because the financial condition of the issuers is sound, none 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. During the three months ended March 31, 2015, the Company did not purchase any corporate obligations. This compares to a total of $12.0 million purchased during the same period in 2014.
Trust Preferred Securities
Trust preferred securities represent subordinated debt issued by financial institutions. At March 31, 2015, the Company owned two trust preferred securities with a total fair value of $1.3 million and total 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 total net unrealized loss of $0.2 million at December 31, 2014. At March 31, 2015 and December 31, 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, none 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
At March 31, 2015 and December 31, 2014, the Company owned marketable equity securities with a fair value of $1.0 million, which approximated amortized cost. At March 31, 2015 and December 31, 2014, none of the securities in this portfolio was in an unrealized loss position.
Investment Securities Held-to-Maturity
At March 31, 2015 and December 31, 2014, the Company owned a held-to-maturity investment security with a carrying value of $0.5 million and a fair value of $0.5 million. This investment security matures in March 2016 and carries an interest rate of 1.3%.
Portfolio Maturities
The final stated maturities of the debt securities are as follows at the dates indicated:
	At March 31, 2015						At December 31, 2014
	Amortized		Estimated		Weighted		Amortized			Estimated			Weighted
	Cost		Fair Value		Average		Cost			Fair Value			Average
					Rate								Rate
	(Dollars in Thousands)
Investment securities available-for-sale:
Within 1 year	$	5,985	$	6,027	2.42	%	$	3,057		$	3,081		3	%
After 1 year through 5 years	55,299		56,593		2.46	%	55,631			56,586			2.48	%
After 5 years through 10 years	94,946		96,674		1.98	%	103,268			104,208			2	%
Over 10 years	405,392		404,837		1.91	%	390,685			385,913			1.91	%
	$	561,622	$	564,131	1.98	%	$	552,641		$	549,788		1.99	%
Investment securities held-to-maturity:
Within 1 year	$	500	$	500	1.3	%	$	—		$	—		—	%
After 1 year through 5 years	—		—		—	%	500			500			1.3	%
	$	500	$	500	1.3	%	$	500		$	500		1.3	%
Actual maturities of debt securities may differ from those presented above since certain obligations provide the issuer the right to call or prepay the obligation prior to scheduled maturity without penalty. At March 31, 2015, issuers of debt securities with an estimated fair value of $12.0 million had the right to call or prepay the obligations. Of the $12.0 million, $8.0 million matures in 1 - 5 years and $4.0 million matures in 6 - 10 years. At December 31, 2014, issuers of debt securities with an estimated fair value of $16.1 million had the right to call or prepay the obligations. Of the $16.1 million, approximately $5.0 million matures in 1 - 5 years, $9.9 million matures in 6 - 10 years and $1.2 million matures after ten years. MBSs and CMOs are included above based on their contractual maturities; the remaining lives, however, are expected to be shorter due to anticipated prepayments.
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 on loss on the sale. There were no security sales during the three-month periods ended March 31, 2015 and 2014.

Loans_and_Leases

Loans and Leases	3 Months Ended
	Mar. 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 March 31, 2015
		Originated						Acquired				Total
		Balance			Weighted			Balance		Weighted		Balance		Weighted
					Average					Average				Average
					Coupon					Coupon				Coupon
		(Dollars in Thousands)
	Commercial real estate loans:
	Commercial real estate mortgage	$	1,471,054		4.16	%		$	243,086	4.24	%	$	1,714,140	4.17	%
	Multi-family mortgage	590,590			4.1	%		61,910		4.48	%	652,500		4.13	%
	Construction	132,229			3.71	%		2,018		5.42	%	134,247		3.73	%
	Total commercial real estate loans	2,193,873			4.12	%		307,014		4.3	%	2,500,887		4.14	%
	Commercial loans and leases:
	Commercial	515,375			3.85	%		44,969		4.33	%	560,344		3.89	%
	Equipment financing	602,045			6.88	%		12,256		6.14	%	614,301		6.87	%
	Condominium association	52,707			4.59	%		—		—	%	52,707		4.59	%
	Total commercial loans and leases	1,170,127			5.44	%		57,225		4.72	%	1,227,352		5.41	%
	Indirect automobile loans	23,335			5.69	%		—		—	%	23,335		5.69	%
	Consumer loans:
	Residential mortgage	482,774			3.59	%		96,220		3.81	%	578,994		3.63	%
	Home equity	191,715			3.35	%		100,483		3.85	%	292,198		3.53	%
	Other consumer	11,666			4.95	%		162		16.61	%	11,828		5.11	%
	Total consumer loans	686,155			3.55	%		196,865		3.84	%	883,020		3.62	%
	Total loans and leases	$	4,073,490		4.41	%		$	561,104	4.18	%	$	4,634,594	4.39	%
		At December 31, 2014
		Originated						Acquired				Total
		Balance			Weighted			Balance		Weighted		Balance		Weighted
					Average					Average				Average
					Coupon					Coupon				Coupon
		(Dollars in Thousands)
	Commercial real estate loans:
	Commercial real estate mortgage	$	1,425,621		4.18	%		$	254,461	4.29	%	$	1,680,082	4.2	%
	Multi-family mortgage	576,214			4.11	%		63,492		4.5	%	639,706		4.15	%
	Construction	146,074			3.79	%		1,939		5.5	%	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		6.9	%
	Condominium association	51,593			4.6	%		—		—	%	51,593		4.6	%
	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			3.6	%		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	4.4	%
	The Company lends primarily in the eastern half of Massachusetts, southern New Hampshire and Rhode Island, with the exception of equipment financing, 35.5% of which is in the greater New York/New Jersey metropolitan area and 64.5% of which is in other areas in the United States of America at March 31, 2015, compared to 35.9% of which is in the greater New York/New Jersey metropolitan area and 64.1% of which is in other areas in the United States of America at December 31, 2014.
	Competition for the indirect automobile loans increased significantly as credit unions and large national banks entered indirect automobile lending in a search for additional sources of income. 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. Refer to Note 5, "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:
		Three Months Ended March 31,
		2015			2014
		(In Thousands)
	Balance at beginning of period	$	32,044		$	45,789
	Reclassification from nonaccretable difference for loans with improved cash flows	1,440			1,440
	Accretion	(2,824		)	(4,728		)
	Balance at end of period	$	30,660		$	42,501
	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 is due to credit deterioration, or if the change in cash flow is related to noncredit events. This cash flow analysis is used to evaluate the need for a loan loss provision and/or prospective yield adjustments. During the three months ended March 31, 2015 and 2014, accretable yield adjustments totaling $1.4 million were made for certain loan pools. These prospective 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 (representing both principal and interest) applicable to acquired loans and leases totaled $2.1 million and $3.6 million at March 31, 2015 and December 31, 2014, respectively.
	Loans and Leases Pledged as Collateral
	At March 31, 2015 and December 31, 2014, there were $2.0 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 at March 31, 2015 and December 31, 2014.

Allowance_for_Loan_and_Lease_L

Allowance for Loan and Lease Losses	3 Months Ended
	Mar. 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:
		Three Months Ended March 31, 2015
		Commercial				Commercial				Indirect				Consumer				Unallocated			Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2014	$	29,594			$	15,957			$	2,331			$	3,359			$	2,418		$	53,659
	Charge-offs	(388		)		(450		)		(820		)		(7		)		—			(1,665		)
	Recoveries	—				212				581				18				—			811
	Provision (credit) for loan and lease losses	254				3,365				(1,634		)		249				67			2,301
	Balance at March 31, 2015	$	29,460			$	19,084			$	458			$	3,619			$	2,485		$	55,106
		Three Months Ended March 31, 2014
		Commercial				Commercial				Indirect				Consumer				Unallocated			Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2013	$	23,022			$	15,220			$	3,924			$	3,375			$	2,932		$	48,473
	Charge-offs	—				(551		)		(289		)		(210		)		—			(1,050		)
	Recoveries	—				251				104				29				—			384
	Provision for loan and lease losses	1,836				624				(75		)		(84		)		116			2,417
	Balance at March 31, 2014	$	24,858			$	15,544			$	3,664			$	3,110			$	3,048		$	50,224
	The liability for unfunded credit commitments, which is included in other liabilities, was $1.2 million, $1.3 million and $1.1 million at March 31, 2015, December 31, 2014 and March 31, 2014, respectively. The liability for unfunded credit commitments reflects 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 three-month periods ended March 31, 2015 and 2014.
	Provision for Credit Losses
	The provision for credit losses are set forth below for the periods indicated:
		Three Months Ended March 31,
		2015				2014
		(In Thousands)
	Provision (credit) for loan and lease losses:
	Commercial real estate	$	254			$	1,836
	Commercial	3,365				624
	Indirect automobile	(1,634		)		(75		)
	Consumer	249				(84		)
	Unallocated	67				116
	Total provision for loan and lease losses	2,301				2,417
	Unfunded credit commitments	(38		)		26
	Total provision for credit losses	$	2,263			$	2,443
	Procedure for Placing Loans and Leases on Nonaccrual
	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.
	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.
	The allowance for loan and lease losses consists of general, specific and unallocated reserves and reflects management's estimate of probable loan and lease losses inherent in the loan portfolio at the balance sheet date. 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 pools: (1) commercial real estate loans, (2) commercial loans and leases, (3) indirect automobile loans and (4) 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, equipment financing, and loans to condominium associations. The indirect automobile loan segment is not divided into classes. Consumer loans are divided into three classes: residential mortgage loans, home equity 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.
	General Allowance
	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 includes estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analyses 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 a LEP that incurred losses should be carried for each portfolio. Other relevant qualitative factors include, but are not limited to, historic levels and trends in loan charge-offs and recoveries; past-due loans; risk-rated loans; classified loans and impaired loans; the pace of loan growth; underwriting policies and adherence to such policies; changes in credit concentration; the experience of lending personnel and management; trends in the economy and employment; business conditions; industry conditions; and political, legislative and regulatory changes. The general allowance related to the acquired loans collectively evaluated for impairment are 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.
	The general allowance for loan and lease losses was $49.7 million at March 31, 2015, compared to $50.1 million at December 31, 2014. The general portion of the allowance for loan and lease losses decreased by $0.4 million during the three months ended March 31, 2015, largely a result of the sale of the indirect automobile portfolio, partially offset by growth in commercial real estate and commercial loan and lease portfolios. The sale of the indirect automobile portfolio resulted in a release of $1.9 million in the general allowance for loan and lease losses.
	Specific Allowance
	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 troubled debt restructured 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 deemed necessary.
	The specific allowance for loan and lease losses was $2.9 million at March 31, 2015, compared to $1.2 million at December 31, 2014. The specific allowance increased by $1.7 million during the three months ended March 31, 2015, primarily due to one commercial relationship which was downgraded during the three months ended March 31, 2015.
	Unallocated Allowance
	Determination of the unallocated portion of the allowance is a subjective process. Management believes the unallocated allowance is an important component of the total allowance because it addresses the probable inherent risk of loss that exists in that part of the Company's loan portfolio with repayment terms that extend over many years. It also helps to minimize the risk related to the margin of imprecision inherent in the estimation of the allocated components of the allowance. The Company has not allocated the unallocated portion of the allowance to the various loan categories and classes because such an allocation would imply a degree of precision that does not exist.
	The unallocated allowance for loan and lease losses was $2.5 million at March 31, 2015, compared to $2.4 million at December 31, 2014. The unallocated portion of the allowance for loan and lease losses increased by $0.1 million during the three months ended March 31, 2015, largely as the result of the increase in overall allowance for loan and lease losses.
	Credit Quality Assessment
	At the time of loan origination, a rating is assigned based on the financial strength of the borrower and the value of assets pledged as collateral. The Company continually monitors the asset 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 the commercial real estate mortgage, multi-family mortgage, construction, commercial, equipment financing, condominium association and other consumer loan and lease classes, 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 of the commercial real estate and commercial loan portfolios. The results of these reviews are reported to the Board of Directors. For consumer loans, the Company primarily relies on payment status for monitoring credit risk.
	The ratings categories used for assessing credit risk in the commercial real estate mortgage, 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 Asset 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 uncollectable 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 at March 31, 2015 by credit quality indicator.
	At March 31, 2015
	Commercial				Multi-				Construction				Commercial				Equipment			Condominium				Other
	Real Estate				Family												Financing			Association				Consumer
	Mortgage				Mortgage
	(In Thousands)
Originated:
Loan rating:
Pass	$	1,454,500			$	589,373			$	132,229			$	499,770			$	598,603		$	52,707			$	11,621
OAEM	13,368				1,217				—				6,665				896			—				—
Substandard	3,186				—				—				7,997				1,106			—				45
Doubtful	—				—				—				943				1,440			—				—
Total originated	1,471,054				590,590				132,229				515,375				602,045			52,707				11,666
Acquired:
Loan rating:
Pass	226,510				59,169				1,791				39,101				12,186			—				162
OAEM	8,177				1,008				227				1,568				—			—				—
Substandard	7,978				1,733				—				4,208				70			—				—
Doubtful	421				—				—				92				—			—				—
Total acquired	243,086				61,910				2,018				44,969				12,256			—				162
Total loans	$	1,714,140			$	652,500			$	134,247			$	560,344			$	614,301		$	52,707			$	11,828
At March 31, 2015, there were no loans categorized as definite loss.
	At March 31, 2015
	Indirect Automobile
	(In Thousands)				(Percent)
Originated:
Credit score:
Over 700	$	15,915			68.2	%
661-700	5,403				23.2	%
660 and below	1,781				7.6	%
Data not available	236				1	%
Total loans	$	23,335			100	%
	At March 31, 2015
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	105,225			18.1	%		$	122,455			41.9	%
50% - 69%	194,651				33.6	%		37,398				12.8	%
70% - 79%	162,574				28.1	%		27,437				9.4	%
80% and over	18,015				3.1	%		3,352				1.2	%
Data not available	2,309				0.4	%		1,073				0.4	%
Total originated	482,774				83.3	%		191,715				65.7	%
Acquired:
Loan-to-value ratio:
Less than 50%	18,962				3.3	%		66,105				22.6	%
50% - 69%	34,476				6	%		23,163				7.9	%
70% - 79%	22,022				3.8	%		9,040				3.1	%
80% and over	16,114				2.8	%		1,170				0.4	%
Data not available	4,646				0.8	%		1,005				0.3	%
Total acquired	96,220				16.7	%		100,483				34.3	%
Total loans	$	578,994			100	%		$	292,198			100	%
The following tables present the recorded investment in loans in each class at December 31, 2014 by credit quality indicator.
	At December 31, 2014
	Commercial				Multi-				Construction				Commercial				Equipment			Condominium				Other
	Real Estate				Family												Financing			Association				Consumer
	Mortgage				Mortgage
	(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
At December 31, 2014, there were no loans categorized as definite loss.
	At December 31, 2014
	Indirect Automobile
	(In Thousands)				(Percent)
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	%
	At December 31, 2014
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	105,342			18.4	%		$	113,541			39.6	%
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	%		10,569				3.7	%
80% and over	16,268				2.8	%		1,178				0.4	%
Data not available	5,897				1	%		857				0.3	%
Total acquired	99,842				17.4	%		105,478				36.8	%
Total loans	$	571,920			100	%		$	287,058			100	%
Age Analysis of Past Due Loans and Leases
The following tables present an age analysis of the recorded investment in total loans and leases at March 31, 2015 and December 31, 2014.
	At March 31, 2015
	Past Due																							Loans and
																								Leases Past
	31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
	Days				Days				Than 90											and Leases				Than 90 Days				Loans and
									Days															and Accruing				Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate mortgage	$	179			$	1,122			$	200			$	1,501			$	1,469,553		$	1,471,054			$	—			$	3,135
Multi-family mortgage	—				—				—				—				590,590			590,590				—				—
Construction	—				—				—				—				132,229			132,229				—				—
Total commercial real estate loans	179				1,122				200				1,501				2,192,372			2,193,873				—				3,135
Commercial loans and leases:
Commercial	793				52				2,080				2,925				512,450			515,375				—				8,810
Equipment financing	1,659				355				1,775				3,789				598,256			602,045				—				2,321
Condominium association	363				—				—				363				52,344			52,707				—				—
Total commercial loans and leases	2,815				407				3,855				7,077				1,163,050			1,170,127				—				11,131
Indirect automobile	1,957				624				130				2,711				20,624			23,335				—				468
Consumer loans:
Residential mortgage	173				329				499				1,001				481,773			482,774				—				2,290
Home equity	159				—				204				363				191,352			191,715				—				235
Other consumer	24				6				37				67				11,599			11,666				—				45
Total consumer loans	356				335				740				1,431				684,724			686,155				—				2,570
Total originated loans and leases	$	5,307			$	2,488			$	4,925			$	12,720			$	4,060,770		$	4,073,490			$	—			$	17,304
	At March 31, 2015
	Past Due																							Loans and
																								Leases Past
	31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
	Days				Days				Than 90											and Leases				Than 90 Days				Loans and
									Days															and Accruing				Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate mortgage	$	3,186			$	387			$	3,180			$	6,753			$	236,333		$	243,086			$	3,065			$	115
Multi-family mortgage	690				—				2,188				2,878				59,032			61,910				2,188				—
Construction	—				227				—				227				1,791			2,018				—				—
Total commercial real estate loans	3,876				614				5,368				9,858				297,156			307,014				5,253				115
Commercial loans and leases:
Commercial	348				594				3,309				4,251				40,718			44,969				624				3,229
Equipment financing	—				—				62				62				12,194			12,256				72				—
Total commercial loans and leases	348				594				3,371				4,313				52,912			57,225				696				3,229
Consumer loans:
Residential mortgage	66				51				2,419				2,536				93,684			96,220				2,077				342
Home equity	892				149				968				2,009				98,474			100,483				35				1,744
Other consumer	—				—				—				—				162			162				—				—
Total consumer loans	958				200				3,387				4,545				192,320			196,865				2,112				2,086
Total acquired loans and leases	$	5,182			$	1,408			$	12,126			$	18,716			$	542,388		$	561,104			$	8,061			$	5,430
Total loans and leases	$	10,489			$	3,896			$	17,051			$	31,436			$	4,603,158		$	4,634,594			$	8,061			$	22,734
	At December 31, 2014
	Past Due																							Loans and
																								Leases Past
	31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
	Days				Days				Than 90											and Leases				Than 90 Days				Loans and
									Days															and Accruing				Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate mortgage	$	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
	31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
	Days				Days				Than 90											and Leases				Than 90 Days				Loans and
									Days															and Accruing				Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate mortgage	$	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 loan and leases	$	12,439			$	8,117			$	14,364			$	34,920			$	4,787,687		$	4,822,607			$	6,008			$	13,714
Commercial Real Estate Loans — At March 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 mortgage loans — 37.0%; multi-family mortgage loans — 14.1%; and construction loans — 2.9%.
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 — At March 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 — 12.1%; equipment financing loans — 13.3%; and loans to condominium associations — 1.1%.
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.
Indirect Automobile Loans — At March 31, 2015, indirect automobile loans represented 0.5% of the Company’s total loan and lease portfolio. Determination of the allowance for loan and lease losses for this portfolio is based primarily on payment status and historical loss rates.
Consumer Loans — At March 31, 2015, loans outstanding within the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: residential mortgage loans — 12.5%; home equity loans — 6.3%; and other consumer loans — 0.3%.
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 indicators 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.
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 March 31, 2015												At December 31, 2014
	Recorded				Unpaid				Related				Recorded				Unpaid			Related
	Investment (1)				Principal				Allowance				Investment (2)				Principal			Allowance
					Balance												Balance
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	4,914			$	4,909			$	—			$	2,751			$	2,748		$	—
Commercial	15,020				14,998				—				13,440				13,421			—
Consumer	4,077				4,072				—				3,055				3,048			—
Total originated with no related allowance recorded	24,011				23,979				—				19,246				19,217			—
With an allowance recorded:
Commercial real estate	4,102				4,102				98				4,119				4,119			108
Commercial	5,726				5,717				2,411				2,019				2,011			768
Consumer	169				169				10				176				176			10
Total originated with an allowance recorded	9,997				9,988				2,519				6,314				6,306			886
Total originated impaired loans and leases	34,008				33,967				2,519				25,560				25,523			886
Acquired:
With no related allowance recorded:
Commercial real estate	10,011				10,026				—				9,413				9,428			—
Commercial	4,379				4,376				—				6,049				6,047			—
Consumer	7,365				7,366				—				6,688				6,688			—
Total acquired with no related allowance recorded	21,755				21,768				—				22,150				22,163			—
With an allowance recorded:
Commercial real estate	243				243				23				244				244			22
Commercial	872				872				287				478				478			214
Consumer	352				352				47				225				225			41
Total acquired with an allowance recorded	1,467				1,467				357				947				947			277
Total acquired impaired loans and leases	23,222				23,235				357				23,097				23,110			277
Total impaired loans and leases	$	57,230			$	57,202			$	2,876			$	48,657			$	48,633		$	1,163
(1)Includes originated and acquired nonaccrual loans of $15.6 million and $5.3 million, respectively at March 31, 2015.
(2)Includes originated and acquired nonaccrual loans of $7.1 million and $4.6 million, respectively at December 31, 2014.
	Three Months Ended
	31-Mar-15								31-Mar-14
	Average				Interest				Average				Interest
	Recorded				Income				Recorded				Income
	Investment				Recognized				Investment				Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	4,928			$	22			$	3,898			$	36
Commercial	15,231				152				3,880				8
Consumer	4,080				15				3,832				13
Total originated with no related allowance recorded	24,239				189				11,610				57
With an allowance recorded:
Commercial real estate	4,109				50				164				—
Commercial	5,862				3				3,657				24
Consumer	172				—				298				—
Total originated with an allowance recorded	10,143				53				4,119				24
Total originated impaired loans and leases	34,382				242				15,729				81
Acquired:
With no related allowance recorded:
Commercial real estate	10,329				37				7,577				46
Commercial	4,503				15				8,221				36
Consumer	7,391				15				8,271				5
Total acquired with no related allowance recorded	22,223				67				24,069				87
With an allowance recorded:
Commercial real estate	244				—				4,420				37
Commercial	872				—				546				1
Consumer	360				2				—				—
Total acquired with an allowance recorded	1,476				2				4,966				38
Total acquired impaired loans and leases	23,699				69				29,035				125
Total impaired loans and leases	$	58,081			$	311			$	44,764			$	206
The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated:
	At March 31, 2015
	Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated			Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	98			$	2,411			$	—			$	10			$	—		$	2,519
Collectively evaluated for impairment	27,491				16,078				458				3,164				2,485			49,676
Total originated loans and leases	27,589				18,489				458				3,174				2,485			52,195
Acquired:
Individually evaluated for impairment	—				208				—				47				—			255
Collectively evaluated for impairment	634				217				—				23				—			874
Acquired with deteriorated credit quality	1,237				170				—				375				—			1,782
Total acquired loans and leases	1,871				595				—				445				—			2,911
Total allowance for loan and lease losses	$	29,460			$	19,084			$	458			$	3,619			$	2,485		$	55,106
Loans and Leases:
Originated:
Individually evaluated for impairment	$	9,016			$	20,746			$	—			$	4,246			$	—		$	34,008
Collectively evaluated for impairment	2,184,857				1,149,381				23,335				681,909				—			4,039,482
Total originated loans and leases	2,193,873				1,170,127				23,335				686,155				—			4,073,490
Acquired:
Individually evaluated for impairment	615				4,294				—				3,311				—			8,220
Collectively evaluated for impairment	91,081				31,615				—				127,262				—			249,958
Acquired with deteriorated credit quality	215,318				21,316				—				66,292				—			302,926
Total acquired loans and leases	307,014				57,225				—				196,865				—			561,104
Total loans and leases	$	2,500,887			$	1,227,352			$	23,335			$	883,020			$	—		$	4,634,594
	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
Troubled Debt Restructured Loans and Leases
A specific valuation allowance for losses on troubled debt restructured 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.
The following table sets forth information regarding troubled debt restructured loans and leases at the dates indicated:
	At March 31, 2015				At December 31, 2014
	(Dollars in Thousands)
Troubled debt restructurings:
On accrual	$	14,184			$	14,815
On nonaccrual	6,126				5,625
Total troubled debt restructurings	$	20,310			$	20,440
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, are as follows for the periods indicated.
	At and for the Three Months Ended March 31, 2015
	Recorded Investment											Specific							Defaulted(1)
	Number			At				At End of				Allowance for				Nonaccrual			Additional				Number of			Recorded
	of Loans/			Modification				Period				Loan and				Loans and			Commitment				Loans/			Investment
	Leases											Lease Losses				Leases							Leases
	(Dollars in Thousands)
Originated:
Commercial	3			$	2,569			$	2,568			$	—			$	248		$	—			1			248
Equipment financing	1			112				112				—				—			—				1			491
Total Originated	4			2,681				2,680				—				248			—				2			739
Acquired:
Commercial	1			13				13				—				13			—				2			406
Residential mortgage	1			140				140				12				—			—				—			—
Total Acquired	2			153				153				12				13			—				2			406
Total	6			$	2,834			$	2,833			$	12			$	261		$	—			4			$	1,145
(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 Three Months Ended March 31, 2014
	Recorded Investment											Specific							Defaulted(1)
	Number			At				At End of				Allowance for				Nonaccrual			Additional				Number of			Recorded
	of Loans/			Modification				Period				Loan and				Loans and			Commitment				Loans/			Investment
	Leases											Lease Losses				Leases							Leases
	(Dollars in Thousands)
Originated:
Commercial real estate mortgage	1			$	953			$	951			$	—			$	—		$	—			—			$	—
Equipment financing	1			384				382				—				382			—				2			266
Residential mortgage	1			498				498				—				498			—				—			—
Total	3			$	1,835			$	1,831			$	—			$	880		$	—			2			$	266
(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.
For the three months ended March 31, 2014, there were no troubled debt restructurings in the Company’s acquired portfolio.
The following table sets forth the Company’s balances of troubled debt restructurings that were modified at the dates indicated, by type of modification.
	Three Months Ended March 31,
	2015				2014
	(In Thousands)
Loans with one modification:
Adjusted interest rate	$	140			$	880
Combination maturity, principal, interest rate	125				—
Total loans with one modification	265				880
Loans with more than one modification:
Extended maturity	2,568				951
Total loans with more than one modification	2,568				951
Total loans with modifications	$	2,833			$	1,831
The financial impact of the modification of performing and nonperforming loans and leases for the three months ended March 31, 2015 was $0.03 million. There was no financial impact of the modification of performing and nonperforming loans and leases for the three months ended March 31, 2014.
As of March 31, 2015 and 2014, there were no commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings.

Premises_and_Equipment

Premises and Equipment	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment
	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 three months ended March 31, 2014, which is included in gain on sale/disposals of premises and equipment, net in the Company’s unaudited consolidated statements of income. There was no sale of property during the quarter ended March 31, 2015.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:
		At March 31, 2015		At December 31, 2014
		(In Thousands)
	Goodwill	$	137,890	$	137,890
	Other intangible assets:
	Core deposits	11,717		12,455
	Trade name	1,089		1,089
	Total other intangible assets	12,806		13,544
	Total goodwill and other intangible assets	$	150,696	$	151,434
	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.
	The estimated aggregate future amortization expense (in thousands) for intangible assets with a finite life remaining at March 31, 2015 is as follows:
	Remainder of 2015	$	2,173
	Year ending:
	2016	2,500
	2017	2,089
	2018	1,669
	2019	1,295
	Thereafter	1,991
	Total	$	11,717

Investments_in_Qualified_Affor

Investments in Qualified Affordable Housing Projects	3 Months Ended
	Mar. 31, 2015
Investments in Affordable Housing Projects [Abstract]
Investments in Qualified Affordable Housing Projects	Investments in Qualified Affordable Housing Projects
	The Company began investing in affordable housing projects that benefit low- and moderate-income individuals in 2009. As of March 31, 2015, the Company has investments in 8 projects. The Company is a limited partner in these projects given that its investments do not exceed 50% of the outstanding equity interest in any single project and project management is controlled by the general partner or project sponsor.
	On January 1, 2015, the Company adopted ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects, which required retrospective application. Under the proportional amortization method in ASU 2014-01, the initial costs of investment in qualified affordable housing projects are amortized in proportion to tax credits and other tax benefits received, and are recognized as a component of the provision of income taxes in the consolidated statements of income. Prior to the implementation of ASU 2014-01, the Company’s investments in qualified affordable housing projects were accounted for using the equity method where operating losses from these investments were included as a component of non-interest income in the consolidated statements of income. Further information regarding the Company's investments in affordable housing projects follows:
		At March 31, 2015			At December 31, 2014
		(In Thousands)
	Investments in affordable housing projects included in other assets	$	10,790		$	10,313
	Unfunded commitments related to affordable housing projects included in other liabilities	2,338			2,608
		At and for the
		Three Months Ended
		31-Mar-15
		(In Thousands)
	Investments in affordable housing projects tax credits included in other liabilities	$	397
	Investments in affordable housing projects tax benefits included in other liabilities	164
	Investment amortization included in pretax income	410
	Amount recognized as income tax benefit	151
	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
		Three Months Ended March 31, 2014
		(In Thousands)
	Loss from investments in affordable housing projects, as reported	$	504
	Prior period adjustment	(504		)
	Loss from investments in affordable housing projects, as adjusted	$	—
	Provision for income taxes, as reported	$	5,995
	Prior period adjustment	384
	Provision for income taxes, as adjusted	$	6,379
	Net income, as reported	$	10,422
	Prior period adjustment	120
	Net income, as adjusted	$	10,542
	Earnings per share, as reported	$	0.15
	Prior period adjustment	—
	Earnings per share, as adjusted	$	0.15
	Effective tax rate, as reported	35.6		%
	Prior period adjustment	1.18		%
	Effective tax rate, as adjusted	36.78		%

Comprehensive_IncomeLoss

Comprehensive Income/(Loss)	3 Months Ended
	Mar. 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 three months ended March 31, 2015 and March 31, 2014, 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:
		Three Months Ended March 31, 2015
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2014	$	(1,733	)	$	111		$	(1,622	)
	Other comprehensive income	3,369			—			3,369
	Balance at March 31, 2015	$	1,636		$	111		$	1,747
		Three Months Ended March 31, 2014
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2013	$	(8,332	)	$	417		$	(7,915	)
	Other comprehensive income (loss)	2,031			(52		)	1,979
	Balance at March 31, 2014	$	(6,301	)	$	365		$	(5,936	)
	The Company did not reclassify any amounts out of accumulated other comprehensive income (loss) for the three months ended March 31, 2015 and 2014.

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	3 Months Ended
	Mar. 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 at March 31, 2015 or December 31, 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 the Company's unaudited consolidated statements of income. The Company had 22 interest-rate swaps related to this program with an aggregate notional amount of $110.2 million at March 31, 2015, compared with 22 interest-rate swaps with an aggregate notional amount of $109.4 million at December 31, 2014.
	Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the unaudited consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments at March 31, 2015 and December 31, 2014.
		At March 31, 2015					At December 31, 2014
		Asset			Liability		Asset		Liability
		Derivatives			Derivatives		Derivatives		Derivatives
		(In Thousands)
	Total derivatives (interest-rate products) not designated as hedging instruments	$	3,642		$	3,771	$	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 three months ended March 31, 2015 and March 31, 2014.
		Three Months Ended March 31,
		2015			2014
		(In Thousands)
	(Loss) gain recognized in income on derivatives	$	(91	)	$	2
	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. As the swaps are subject to master netting agreements, the Company had limited exposure relating to interest rate swaps with institutional counterparties. The estimated net credit risk exposure was $129.8 thousand at March 31, 2015 compared to $39.3 thousand at December 31, 2014.
	Certain of the derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. The Company has posted collateral of $7.8 million and $5.4 million in the normal course of business at March 31, 2015 and December 31, 2014, respectively.
	The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet at the dates indicated.
		At March 31, 2015
		Gross			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in the				Net Amount
		Amounts of			Offset in the		Assets Presented in		Statement of Financial Position
		Recognized			Statement of Financial Position		the Statement of Financial Position
		Assets /Liabilities							Financial Instruments		Cash Collateral (Received)/ Posted
		(In Thousands)
	Asset Derivatives	$	3,642		$	—	$	3,642	$	—	$	—	$	3,642
	Liability Derivatives	$	3,771		$	—	$	3,771	$	—	$	7,849	$	11,620
		At December 31, 2014
		Gross			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in the				Net Amount
		Amounts of			Offset in the		Assets Presented in		Statement of Financial Position
		Recognized			Statement of Financial Position		the Statement of Financial Position
		Assets /Liabilities							Financial Instruments		Cash Collateral (Received) / Posted
		(In Thousands)
	Asset Derivatives	$	2,676		$	—	$	2,676	$	—	$	—	$	2,676
	Liability Derivatives	$	2,714		$	—	$	2,714	$	—	$	5,353	$	8,067
	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.

Stock_Based_Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation
	As of March 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 (the "2011 RSA") with 500,000 authorized shares and the 2014 Equity Incentive Plan (the "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 20 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 shareholder return. If a participant leaves the Company prior to the third anniversary date of an award, any unvested shares will be forfeited. Dividends declared with respect to shares awarded are 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 $0.4 million for the three months ended March 31, 2015 and 2014.

Earnings_per_Share

Earnings per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share
	The following table sets forth a reconciliation of basic and diluted earnings per share (“EPS”) for the periods indicated:
		Three Months Ended
		31-Mar-15				31-Mar-14
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	11,703	$	11,703	$	10,542	$	10,542
	Denominator:
	Weighted average shares outstanding	70,036,090		70,036,090		69,875,473		69,875,473
	Effect of dilutive securities	—		128,015		—		108,526
	Adjusted weighted average shares outstanding	70,036,090		70,164,105		69,875,473		69,983,999
	EPS	$	0.17	$	0.17	$	0.15	$	0.15

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 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 the three months ended March 31, 2015 and March 31, 2014.
	Assets and Liabilities Recorded at Fair Value on a Recurring Basis
	The following tables set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at the dates indicated:
		Carrying Value at March 31, 2015
		Level 1		Level 2			Level 3		Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	Debt securities:
	GSEs	$	—	$	23,253		$	—	$	23,253
	GSE CMOs	—		227,843			—		227,843
	GSE MBSs	—		271,034			—		271,034
	SBA commercial loan asset-backed securities	—		197			—		197
	Corporate debt obligations	—		40,541			—		40,541
	Trust preferred securities	—		1,262			—		1,262
	Total debt securities	—		564,130			—		564,130
	Marketable equity securities	985		—			—		985
	Total investment securities available-for-sale	$	985	$	564,130		$	—	$	565,115
	Interest-rate swaps	$	—	$	3,642		$	—	$	3,642
	Liabilities:
	Interest-rate swaps	$	—	$	3,771		$	—	$	3,771
		Carrying Value at 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 certain U.S. and government agency debt securities, GSE residential MBSs and CMOs, private-label CMOs, municipal and corporate debt securities, and trust preferred securities, all of which are included in Level 2. Certain fair values estimated using pricing models (such as auction-rate municipal securities) are 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. The change in value of interest-rate swap assets and liabilities attributable to credit risk was not significant during the reported periods. See also Note 10, “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:
		Three Months Ended March 31,
		2015		2014
		(In Thousands)
	Investment securities available-for-sale, beginning of period	$	—	$	1,775
	Total unrealized losses included in other comprehensive income	—		(85		)
	Investment securities available-for-sale, end of period	$	—	$	1,690
	There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during the three months ended March 31, 2015 and 2014.
	Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis
	The table below summarizes assets and liabilities measured at fair value on a non-recurring basis at the dates indicated:
		Carrying Value at March 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	$	—	$	—		$	16,530	$	16,530
	OREO	—		—			1,043		1,043
	Repossessed assets	—		980			—		980
	Total assets measured at fair value on a non-recurring basis	$	—	$	980		$	17,573	$	18,553
		Carrying Value at 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 other real estate owned 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 and non-recurring basis at the dates indicated.
	Fair Value					Valuation Technique
	At March 31, 2015		At December 31, 2014
	(Dollars in Thousands)
Collateral-dependent impaired loans and leases	$	16,530	$	6,376		Appraisal of collateral (1)
Other real estate owned	$	1,043	$	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		Estimated			Level 1		Level 2		Level 3
	Value		Fair Value			Inputs		Inputs		Inputs
	(In Thousands)
At March 31, 2015
Financial assets:
Investment securities held-to-maturity	$	500	$	500		$	—	$	—	$	500
Loans held-for-sale	787		787			—		787		—
Loans and leases, net	4,579,488		4,592,417			—		—		4,592,417
Financial liabilities:
Certificates of deposit	1,051,580		1,061,059			—		1,061,059		—
Borrowed funds	924,925		931,448			—		931,448		—
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 investment securities held-to-maturity are estimated using pricing models or 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 were 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 on 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.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 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 credit, 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 sheet. The Company’s exposure to credit loss in the event of non-performance by the counterparty is represented by the contractual amount 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 March 31, 2015		At December 31, 2014
		(In Thousands)
	Financial instruments whose contract amounts represent credit risk:
	Commitments to originate loans and leases:
	Commercial real estate	$	56,739	$	107,179
	Commercial	74,264		102,353
	Residential mortgage	9,878		20,520
	Unadvanced portion of loans and leases	534,040		629,351
	Unused lines of credit:
	Home equity	249,810		244,603
	Other consumer	11,743		10,876
	Other commercial	859		728
	Unused letters of credit:
	Financial standby letters of credit	16,249		16,762
	Performance standby letters of credit	10		3,126
	Commercial and similar letters of credit	50		50
	Back-to-back interest-rate swaps	110,152		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 credit 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 $1.2 million at March 31, 2015 and $1.3 million at December 31, 2014.
	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 is $3.6 million and $3.8 million, respectively, at March 31, 2015. The fair value of interest rate swap assets and liabilities is $2.7 million and $2.7 million, respectively, at 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 20 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:
		Minimum Rental Payments
		(In Thousands)
	Remainder of 2015	4,130
	Year ending:
	2016	5,354
	2017	4,831
	2018	4,275
	2019	3,361
	Thereafter	12,266
	Total	$	34,217
	The leases contain escalation clauses for real estate taxes and other expenditures. Total rental expense was $1.2 million during the three months ended March 31, 2015. There was no lease acceleration expenses during the three months ended March 31, 2015. This compared to rental expense of $2.3 million during the three months ended March 31, 2014, which included $0.8 million in lease acceleration related to a relocation of an operations center and a closure of a branch property.
	Legal Proceedings
	There are various outstanding legal proceedings in the normal course of business. 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 by the outcome of such proceedings.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation
	The unaudited consolidated financial statements of the Company presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP”). In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2014.
	The unaudited 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 and leases, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowances.
	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, which did not change stockholders' equity and net income reported.
Recent Accounting Pronouncements	During the quarter ended March 31, 2015, the Financial Accounting Standards Board (“FASB”) issued no new Accounting Standards Updates ("ASUs") that were applicable to the Company. Refer to page F-20 of the Company's Annual Report on Form 10-K for the year ended December 31, 2014 for applicable ASUs issued in 2014.
	The Company adopted ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects, which required retrospective application. Refer to Note 8, "Investments in Qualified Affordable Projects" for the impact the adoption had on the Company's financial statements.

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 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 March 31, 2015
		Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair Value
				Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	22,890	$	363	$	—		$	23,253
	GSE CMOs	229,591		342		2,090			227,843
	GSE MBSs	267,648		3,783		397			271,034
	SBA commercial loan asset-backed securities	199		—		2			197
	Corporate debt obligations	39,829		712		—			40,541
	Trust preferred securities	1,464		—		202			1,262
	Total debt securities	561,621		5,200		2,691			564,130
	Marketable equity securities	950		35		—			985
	Total investment securities available-for-sale	$	562,571	$	5,235	$	2,691		$	565,115
	Investment securities held-to-maturity	$	500	$	—	$	—		$	500
		At December 31, 2014
		Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair Value
				Gains		Losses
		(In Thousands)
	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	$	500	$	—	$	—		$	500
Investment securities in a continuous unrealized loss position	Investment securities at March 31, 2015 and December 31, 2014 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:
		At March 31, 2015
		Less than Twelve Months				Twelve Months or Longer						Total
		Estimated		Unrealized		Estimated			Unrealized			Estimated			Unrealized
		Fair Value		Losses		Fair Value			Losses			Fair Value			Losses
		(In Thousands)
	Investment securities:
	GSE CMOs	$	40,851	$	160	$	116,877		$	1,930		$	157,728		$	2,090
	GSE MBSs	15,485		45		19,319			352			34,804			397
	SBA commercial loan asset-backed securities	7		—		180			2			187			2
	Trust preferred securities	—		—		1,262			202			1,262			202
	Total temporarily impaired investment securities	$	56,343	$	205	$	137,638		$	2,486		$	193,981		$	2,691
		At December 31, 2014
		Less than Twelve Months				Twelve Months or Longer						Total
		Estimated		Unrealized		Estimated			Unrealized			Estimated			Unrealized
		Fair Value		Losses		Fair Value			Losses			Fair Value			Losses
		(In Thousands)
	Investment securities:
	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	—		—		1,240			223			1,240			223
	Total temporarily impaired investment securities	$	104,357	$	293	$	231,326		$	5,662		$	335,683		$	5,955
Schedule of maturities of debt securities	The final stated maturities of the debt securities are as follows at the dates indicated:
		At March 31, 2015						At December 31, 2014
		Amortized		Estimated		Weighted		Amortized			Estimated			Weighted
		Cost		Fair Value		Average		Cost			Fair Value			Average
						Rate								Rate
		(Dollars in Thousands)
	Investment securities available-for-sale:
	Within 1 year	$	5,985	$	6,027	2.42	%	$	3,057		$	3,081		3	%
	After 1 year through 5 years	55,299		56,593		2.46	%	55,631			56,586			2.48	%
	After 5 years through 10 years	94,946		96,674		1.98	%	103,268			104,208			2	%
	Over 10 years	405,392		404,837		1.91	%	390,685			385,913			1.91	%
		$	561,622	$	564,131	1.98	%	$	552,641		$	549,788		1.99	%
	Investment securities held-to-maturity:
	Within 1 year	$	500	$	500	1.3	%	$	—		$	—		—	%
	After 1 year through 5 years	—		—		—	%	500			500			1.3	%
		$	500	$	500	1.3	%	$	500		$	500		1.3	%

Loans_and_Leases_Tables

Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Summary of loan and lease balances and weighted average coupon rates 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 March 31, 2015
		Originated						Acquired				Total
		Balance			Weighted			Balance		Weighted		Balance		Weighted
					Average					Average				Average
					Coupon					Coupon				Coupon
		(Dollars in Thousands)
	Commercial real estate loans:
	Commercial real estate mortgage	$	1,471,054		4.16	%		$	243,086	4.24	%	$	1,714,140	4.17	%
	Multi-family mortgage	590,590			4.1	%		61,910		4.48	%	652,500		4.13	%
	Construction	132,229			3.71	%		2,018		5.42	%	134,247		3.73	%
	Total commercial real estate loans	2,193,873			4.12	%		307,014		4.3	%	2,500,887		4.14	%
	Commercial loans and leases:
	Commercial	515,375			3.85	%		44,969		4.33	%	560,344		3.89	%
	Equipment financing	602,045			6.88	%		12,256		6.14	%	614,301		6.87	%
	Condominium association	52,707			4.59	%		—		—	%	52,707		4.59	%
	Total commercial loans and leases	1,170,127			5.44	%		57,225		4.72	%	1,227,352		5.41	%
	Indirect automobile loans	23,335			5.69	%		—		—	%	23,335		5.69	%
	Consumer loans:
	Residential mortgage	482,774			3.59	%		96,220		3.81	%	578,994		3.63	%
	Home equity	191,715			3.35	%		100,483		3.85	%	292,198		3.53	%
	Other consumer	11,666			4.95	%		162		16.61	%	11,828		5.11	%
	Total consumer loans	686,155			3.55	%		196,865		3.84	%	883,020		3.62	%
	Total loans and leases	$	4,073,490		4.41	%		$	561,104	4.18	%	$	4,634,594	4.39	%
		At December 31, 2014
		Originated						Acquired				Total
		Balance			Weighted			Balance		Weighted		Balance		Weighted
					Average					Average				Average
					Coupon					Coupon				Coupon
		(Dollars in Thousands)
	Commercial real estate loans:
	Commercial real estate mortgage	$	1,425,621		4.18	%		$	254,461	4.29	%	$	1,680,082	4.2	%
	Multi-family mortgage	576,214			4.11	%		63,492		4.5	%	639,706		4.15	%
	Construction	146,074			3.79	%		1,939		5.5	%	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		6.9	%
	Condominium association	51,593			4.6	%		—		—	%	51,593		4.6	%
	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			3.6	%		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	4.4	%
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:
		Three Months Ended March 31,
		2015			2014
		(In Thousands)
	Balance at beginning of period	$	32,044		$	45,789
	Reclassification from nonaccretable difference for loans with improved cash flows	1,440			1,440
	Accretion	(2,824		)	(4,728		)
	Balance at end of period	$	30,660		$	42,501

Allowance_for_Loan_and_Lease_L1

Allowance for Loan and Lease Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment	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:
		Three Months Ended March 31, 2015
		Commercial				Commercial				Indirect				Consumer				Unallocated			Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2014	$	29,594			$	15,957			$	2,331			$	3,359			$	2,418		$	53,659
	Charge-offs	(388		)		(450		)		(820		)		(7		)		—			(1,665		)
	Recoveries	—				212				581				18				—			811
	Provision (credit) for loan and lease losses	254				3,365				(1,634		)		249				67			2,301
	Balance at March 31, 2015	$	29,460			$	19,084			$	458			$	3,619			$	2,485		$	55,106
		Three Months Ended March 31, 2014
		Commercial				Commercial				Indirect				Consumer				Unallocated			Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2013	$	23,022			$	15,220			$	3,924			$	3,375			$	2,932		$	48,473
	Charge-offs	—				(551		)		(289		)		(210		)		—			(1,050		)
	Recoveries	—				251				104				29				—			384
	Provision for loan and lease losses	1,836				624				(75		)		(84		)		116			2,417
	Balance at March 31, 2014	$	24,858			$	15,544			$	3,664			$	3,110			$	3,048		$	50,224
Schedule of provisions for credit losses	The provision for credit losses are set forth below for the periods indicated:
		Three Months Ended March 31,
		2015				2014
		(In Thousands)
	Provision (credit) for loan and lease losses:
	Commercial real estate	$	254			$	1,836
	Commercial	3,365				624
	Indirect automobile	(1,634		)		(75		)
	Consumer	249				(84		)
	Unallocated	67				116
	Total provision for loan and lease losses	2,301				2,417
	Unfunded credit commitments	(38		)		26
	Total provision for credit losses	$	2,263			$	2,443
Summary of the recorded investments in loans in each class (unpaid balance of loans and leases outstanding excluding deferred loan origination costs) by credit quality indicator	The following tables present the recorded investment in loans in each class at March 31, 2015 by credit quality indicator.
		At March 31, 2015
		Commercial				Multi-				Construction				Commercial				Equipment			Condominium				Other
		Real Estate				Family												Financing			Association				Consumer
		Mortgage				Mortgage
		(In Thousands)
	Originated:
	Loan rating:
	Pass	$	1,454,500			$	589,373			$	132,229			$	499,770			$	598,603		$	52,707			$	11,621
	OAEM	13,368				1,217				—				6,665				896			—				—
	Substandard	3,186				—				—				7,997				1,106			—				45
	Doubtful	—				—				—				943				1,440			—				—
	Total originated	1,471,054				590,590				132,229				515,375				602,045			52,707				11,666
	Acquired:
	Loan rating:
	Pass	226,510				59,169				1,791				39,101				12,186			—				162
	OAEM	8,177				1,008				227				1,568				—			—				—
	Substandard	7,978				1,733				—				4,208				70			—				—
	Doubtful	421				—				—				92				—			—				—
	Total acquired	243,086				61,910				2,018				44,969				12,256			—				162
	Total loans	$	1,714,140			$	652,500			$	134,247			$	560,344			$	614,301		$	52,707			$	11,828
	At March 31, 2015, there were no loans categorized as definite loss.
		At March 31, 2015
		Indirect Automobile
		(In Thousands)				(Percent)
	Originated:
	Credit score:
	Over 700	$	15,915			68.2	%
	661-700	5,403				23.2	%
	660 and below	1,781				7.6	%
	Data not available	236				1	%
	Total loans	$	23,335			100	%
		At March 31, 2015
		Residential Mortgage							Home Equity
		(In Thousands)				(Percent)			(In Thousands)				(Percent)
	Originated:
	Loan-to-value ratio:
	Less than 50%	$	105,225			18.1	%		$	122,455			41.9	%
	50% - 69%	194,651				33.6	%		37,398				12.8	%
	70% - 79%	162,574				28.1	%		27,437				9.4	%
	80% and over	18,015				3.1	%		3,352				1.2	%
	Data not available	2,309				0.4	%		1,073				0.4	%
	Total originated	482,774				83.3	%		191,715				65.7	%
	Acquired:
	Loan-to-value ratio:
	Less than 50%	18,962				3.3	%		66,105				22.6	%
	50% - 69%	34,476				6	%		23,163				7.9	%
	70% - 79%	22,022				3.8	%		9,040				3.1	%
	80% and over	16,114				2.8	%		1,170				0.4	%
	Data not available	4,646				0.8	%		1,005				0.3	%
	Total acquired	96,220				16.7	%		100,483				34.3	%
	Total loans	$	578,994			100	%		$	292,198			100	%
	The following tables present the recorded investment in loans in each class at December 31, 2014 by credit quality indicator.
		At December 31, 2014
		Commercial				Multi-				Construction				Commercial				Equipment			Condominium				Other
		Real Estate				Family												Financing			Association				Consumer
		Mortgage				Mortgage
		(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
At December 31, 2014, there were no loans categorized as definite loss.
	At December 31, 2014
	Indirect Automobile
	(In Thousands)				(Percent)
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	%
	At December 31, 2014
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	105,342			18.4	%		$	113,541			39.6	%
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	%		10,569				3.7	%
80% and over	16,268				2.8	%		1,178				0.4	%
Data not available	5,897				1	%		857				0.3	%
Total acquired	99,842				17.4	%		105,478				36.8	%
Total loans	$	571,920			100	%		$	287,058			100	%
Schedule of information regarding the aging of past due loans, by loans and leases class	The following tables present an age analysis of the recorded investment in total loans and leases at March 31, 2015 and December 31, 2014.
		At March 31, 2015
		Past Due																							Loans and
																									Leases Past
		31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
		Days				Days				Than 90											and Leases				Than 90 Days				Loans and
										Days															and Accruing				Leases
		(In Thousands)
	Originated:
	Commercial real estate loans:
	Commercial real estate mortgage	$	179			$	1,122			$	200			$	1,501			$	1,469,553		$	1,471,054			$	—			$	3,135
	Multi-family mortgage	—				—				—				—				590,590			590,590				—				—
	Construction	—				—				—				—				132,229			132,229				—				—
	Total commercial real estate loans	179				1,122				200				1,501				2,192,372			2,193,873				—				3,135
	Commercial loans and leases:
	Commercial	793				52				2,080				2,925				512,450			515,375				—				8,810
	Equipment financing	1,659				355				1,775				3,789				598,256			602,045				—				2,321
	Condominium association	363				—				—				363				52,344			52,707				—				—
	Total commercial loans and leases	2,815				407				3,855				7,077				1,163,050			1,170,127				—				11,131
	Indirect automobile	1,957				624				130				2,711				20,624			23,335				—				468
	Consumer loans:
	Residential mortgage	173				329				499				1,001				481,773			482,774				—				2,290
	Home equity	159				—				204				363				191,352			191,715				—				235
	Other consumer	24				6				37				67				11,599			11,666				—				45
	Total consumer loans	356				335				740				1,431				684,724			686,155				—				2,570
	Total originated loans and leases	$	5,307			$	2,488			$	4,925			$	12,720			$	4,060,770		$	4,073,490			$	—			$	17,304
		At March 31, 2015
		Past Due																							Loans and
																									Leases Past
		31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
		Days				Days				Than 90											and Leases				Than 90 Days				Loans and
										Days															and Accruing				Leases
		(In Thousands)
	Acquired:
	Commercial real estate loans:
	Commercial real estate mortgage	$	3,186			$	387			$	3,180			$	6,753			$	236,333		$	243,086			$	3,065			$	115
	Multi-family mortgage	690				—				2,188				2,878				59,032			61,910				2,188				—
	Construction	—				227				—				227				1,791			2,018				—				—
	Total commercial real estate loans	3,876				614				5,368				9,858				297,156			307,014				5,253				115
	Commercial loans and leases:
	Commercial	348				594				3,309				4,251				40,718			44,969				624				3,229
	Equipment financing	—				—				62				62				12,194			12,256				72				—
	Total commercial loans and leases	348				594				3,371				4,313				52,912			57,225				696				3,229
	Consumer loans:
	Residential mortgage	66				51				2,419				2,536				93,684			96,220				2,077				342
	Home equity	892				149				968				2,009				98,474			100,483				35				1,744
	Other consumer	—				—				—				—				162			162				—				—
	Total consumer loans	958				200				3,387				4,545				192,320			196,865				2,112				2,086
	Total acquired loans and leases	$	5,182			$	1,408			$	12,126			$	18,716			$	542,388		$	561,104			$	8,061			$	5,430
	Total loans and leases	$	10,489			$	3,896			$	17,051			$	31,436			$	4,603,158		$	4,634,594			$	8,061			$	22,734
		At December 31, 2014
		Past Due																							Loans and
																									Leases Past
		31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
		Days				Days				Than 90											and Leases				Than 90 Days				Loans and
										Days															and Accruing				Leases
		(In Thousands)
	Originated:
	Commercial real estate loans:
	Commercial real estate mortgage	$	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
	31-60				61-90				Greater				Total				Current			Total Loans				Due Greater				Nonaccrual
	Days				Days				Than 90											and Leases				Than 90 Days				Loans and
									Days															and Accruing				Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate mortgage	$	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 loan and leases	$	12,439			$	8,117			$	14,364			$	34,920			$	4,787,687		$	4,822,607			$	6,008			$	13,714
Schedule of impaired loans and leases, by loans 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 March 31, 2015												At December 31, 2014
		Recorded				Unpaid				Related				Recorded				Unpaid			Related
		Investment (1)				Principal				Allowance				Investment (2)				Principal			Allowance
						Balance												Balance
		(In Thousands)
	Originated:
	With no related allowance recorded:
	Commercial real estate	$	4,914			$	4,909			$	—			$	2,751			$	2,748		$	—
	Commercial	15,020				14,998				—				13,440				13,421			—
	Consumer	4,077				4,072				—				3,055				3,048			—
	Total originated with no related allowance recorded	24,011				23,979				—				19,246				19,217			—
	With an allowance recorded:
	Commercial real estate	4,102				4,102				98				4,119				4,119			108
	Commercial	5,726				5,717				2,411				2,019				2,011			768
	Consumer	169				169				10				176				176			10
	Total originated with an allowance recorded	9,997				9,988				2,519				6,314				6,306			886
	Total originated impaired loans and leases	34,008				33,967				2,519				25,560				25,523			886
	Acquired:
	With no related allowance recorded:
	Commercial real estate	10,011				10,026				—				9,413				9,428			—
	Commercial	4,379				4,376				—				6,049				6,047			—
	Consumer	7,365				7,366				—				6,688				6,688			—
	Total acquired with no related allowance recorded	21,755				21,768				—				22,150				22,163			—
	With an allowance recorded:
	Commercial real estate	243				243				23				244				244			22
	Commercial	872				872				287				478				478			214
	Consumer	352				352				47				225				225			41
	Total acquired with an allowance recorded	1,467				1,467				357				947				947			277
	Total acquired impaired loans and leases	23,222				23,235				357				23,097				23,110			277
	Total impaired loans and leases	$	57,230			$	57,202			$	2,876			$	48,657			$	48,633		$	1,163
	(1)Includes originated and acquired nonaccrual loans of $15.6 million and $5.3 million, respectively at March 31, 2015.
	(2)Includes originated and acquired nonaccrual loans of $7.1 million and $4.6 million, respectively at December 31, 2014.
		Three Months Ended
		31-Mar-15								31-Mar-14
		Average				Interest				Average				Interest
		Recorded				Income				Recorded				Income
		Investment				Recognized				Investment				Recognized
		(In Thousands)
	Originated:
	With no related allowance recorded:
	Commercial real estate	$	4,928			$	22			$	3,898			$	36
	Commercial	15,231				152				3,880				8
	Consumer	4,080				15				3,832				13
	Total originated with no related allowance recorded	24,239				189				11,610				57
	With an allowance recorded:
	Commercial real estate	4,109				50				164				—
	Commercial	5,862				3				3,657				24
	Consumer	172				—				298				—
	Total originated with an allowance recorded	10,143				53				4,119				24
	Total originated impaired loans and leases	34,382				242				15,729				81
	Acquired:
	With no related allowance recorded:
	Commercial real estate	10,329				37				7,577				46
	Commercial	4,503				15				8,221				36
	Consumer	7,391				15				8,271				5
	Total acquired with no related allowance recorded	22,223				67				24,069				87
	With an allowance recorded:
	Commercial real estate	244				—				4,420				37
	Commercial	872				—				546				1
	Consumer	360				2				—				—
	Total acquired with an allowance recorded	1,476				2				4,966				38
	Total acquired impaired loans and leases	23,699				69				29,035				125
	Total impaired loans and leases	$	58,081			$	311			$	44,764			$	206
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 March 31, 2015
		Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated			Total
		(In Thousands)
	Allowance for Loan and Lease Losses:
	Originated:
	Individually evaluated for impairment	$	98			$	2,411			$	—			$	10			$	—		$	2,519
	Collectively evaluated for impairment	27,491				16,078				458				3,164				2,485			49,676
	Total originated loans and leases	27,589				18,489				458				3,174				2,485			52,195
	Acquired:
	Individually evaluated for impairment	—				208				—				47				—			255
	Collectively evaluated for impairment	634				217				—				23				—			874
	Acquired with deteriorated credit quality	1,237				170				—				375				—			1,782
	Total acquired loans and leases	1,871				595				—				445				—			2,911
	Total allowance for loan and lease losses	$	29,460			$	19,084			$	458			$	3,619			$	2,485		$	55,106
	Loans and Leases:
	Originated:
	Individually evaluated for impairment	$	9,016			$	20,746			$	—			$	4,246			$	—		$	34,008
	Collectively evaluated for impairment	2,184,857				1,149,381				23,335				681,909				—			4,039,482
	Total originated loans and leases	2,193,873				1,170,127				23,335				686,155				—			4,073,490
	Acquired:
	Individually evaluated for impairment	615				4,294				—				3,311				—			8,220
	Collectively evaluated for impairment	91,081				31,615				—				127,262				—			249,958
	Acquired with deteriorated credit quality	215,318				21,316				—				66,292				—			302,926
	Total acquired loans and leases	307,014				57,225				—				196,865				—			561,104
	Total loans and leases	$	2,500,887			$	1,227,352			$	23,335			$	883,020			$	—		$	4,634,594
		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
Information regarding troubled debt restructuring loans	The following table sets forth information regarding troubled debt restructured loans and leases at the dates indicated:
		At March 31, 2015				At December 31, 2014
		(Dollars in Thousands)
	Troubled debt restructurings:
	On accrual	$	14,184			$	14,815
	On nonaccrual	6,126				5,625
	Total troubled debt restructurings	$	20,310			$	20,440
Summary of investment in troubled debt restructurings, and the associated specific allowances for loan and lease losses	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, are as follows for the periods indicated.
		At and for the Three Months Ended March 31, 2015
		Recorded Investment											Specific							Defaulted(1)
		Number			At				At End of				Allowance for				Nonaccrual			Additional				Number of			Recorded
		of Loans/			Modification				Period				Loan and				Loans and			Commitment				Loans/			Investment
		Leases											Lease Losses				Leases							Leases
		(Dollars in Thousands)
	Originated:
	Commercial	3			$	2,569			$	2,568			$	—			$	248		$	—			1			248
	Equipment financing	1			112				112				—				—			—				1			491
	Total Originated	4			2,681				2,680				—				248			—				2			739
	Acquired:
	Commercial	1			13				13				—				13			—				2			406
	Residential mortgage	1			140				140				12				—			—				—			—
	Total Acquired	2			153				153				12				13			—				2			406
	Total	6			$	2,834			$	2,833			$	12			$	261		$	—			4			$	1,145
	(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 Three Months Ended March 31, 2014
		Recorded Investment											Specific							Defaulted(1)
		Number			At				At End of				Allowance for				Nonaccrual			Additional				Number of			Recorded
		of Loans/			Modification				Period				Loan and				Loans and			Commitment				Loans/			Investment
		Leases											Lease Losses				Leases							Leases
		(Dollars in Thousands)
	Originated:
	Commercial real estate mortgage	1			$	953			$	951			$	—			$	—		$	—			—			$	—
	Equipment financing	1			384				382				—				382			—				2			266
	Residential mortgage	1			498				498				—				498			—				—			—
	Total	3			$	1,835			$	1,831			$	—			$	880		$	—			2			$	266
Schedule of troubled debt restructurings by type of modification	The following table sets forth the Company’s balances of troubled debt restructurings that were modified at the dates indicated, by type of modification.
		Three Months Ended March 31,
		2015				2014
		(In Thousands)
	Loans with one modification:
	Adjusted interest rate	$	140			$	880
	Combination maturity, principal, interest rate	125				—
	Total loans with one modification	265				880
	Loans with more than one modification:
	Extended maturity	2,568				951
	Total loans with more than one modification	2,568				951
	Total loans with modifications	$	2,833			$	1,831

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of composition of goodwill and other intangible assets	The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:
		At March 31, 2015		At December 31, 2014
		(In Thousands)
	Goodwill	$	137,890	$	137,890
	Other intangible assets:
	Core deposits	11,717		12,455
	Trade name	1,089		1,089
	Total other intangible assets	12,806		13,544
	Total goodwill and other intangible assets	$	150,696	$	151,434
Schedule of estimated aggregate future amortization expense for intangible assets	The estimated aggregate future amortization expense (in thousands) for intangible assets with a finite life remaining at March 31, 2015 is as follows:
	Remainder of 2015	$	2,173
	Year ending:
	2016	2,500
	2017	2,089
	2018	1,669
	2019	1,295
	Thereafter	1,991
	Total	$	11,717

Investments_in_Qualified_Affor1

Investments in Qualified Affordable Housing Projects (Tables)	3 Months Ended
	Mar. 31, 2015
Investments in Affordable Housing Projects [Abstract]
Investments in Affordable Housing Projects	Further information regarding the Company's investments in affordable housing projects follows:
		At March 31, 2015			At December 31, 2014
		(In Thousands)
	Investments in affordable housing projects included in other assets	$	10,790		$	10,313
	Unfunded commitments related to affordable housing projects included in other liabilities	2,338			2,608
		At and for the
		Three Months Ended
		31-Mar-15
		(In Thousands)
	Investments in affordable housing projects tax credits included in other liabilities	$	397
	Investments in affordable housing projects tax benefits included in other liabilities	164
	Investment amortization included in pretax income	410
	Amount recognized as income tax benefit	151
Schedule of Prior Period Adjustments Related to 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
		Three Months Ended March 31, 2014
		(In Thousands)
	Loss from investments in affordable housing projects, as reported	$	504
	Prior period adjustment	(504		)
	Loss from investments in affordable housing projects, as adjusted	$	—
	Provision for income taxes, as reported	$	5,995
	Prior period adjustment	384
	Provision for income taxes, as adjusted	$	6,379
	Net income, as reported	$	10,422
	Prior period adjustment	120
	Net income, as adjusted	$	10,542
	Earnings per share, as reported	$	0.15
	Prior period adjustment	—
	Earnings per share, as adjusted	$	0.15
	Effective tax rate, as reported	35.6		%
	Prior period adjustment	1.18		%
	Effective tax rate, as adjusted	36.78		%

Comprehensive_IncomeLoss_Table

Comprehensive Income/(Loss) (Tables)	3 Months Ended
	Mar. 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:
		Three Months Ended March 31, 2015
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2014	$	(1,733	)	$	111		$	(1,622	)
	Other comprehensive income	3,369			—			3,369
	Balance at March 31, 2015	$	1,636		$	111		$	1,747
		Three Months Ended March 31, 2014
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2013	$	(8,332	)	$	417		$	(7,915	)
	Other comprehensive income (loss)	2,031			(52		)	1,979
	Balance at March 31, 2014	$	(6,301	)	$	365		$	(5,936	)

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of fair value and classification of the Company's derivative financial instruments on the unaudited consolidated balance sheets and the effect of the Company's derivative financial instruments on the unaudited consolidated income statements	Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the unaudited consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments at March 31, 2015 and December 31, 2014.
		At March 31, 2015					At December 31, 2014
		Asset			Liability		Asset		Liability
		Derivatives			Derivatives		Derivatives		Derivatives
		(In Thousands)
	Total derivatives (interest-rate products) not designated as hedging instruments	$	3,642		$	3,771	$	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 three months ended March 31, 2015 and March 31, 2014.
		Three Months Ended March 31,
		2015			2014
		(In Thousands)
	(Loss) gain recognized in income on derivatives	$	(91	)	$	2
Schedule of offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet	The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet at the dates indicated.
		At March 31, 2015
		Gross			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in the				Net Amount
		Amounts of			Offset in the		Assets Presented in		Statement of Financial Position
		Recognized			Statement of Financial Position		the Statement of Financial Position
		Assets /Liabilities							Financial Instruments		Cash Collateral (Received)/ Posted
		(In Thousands)
	Asset Derivatives	$	3,642		$	—	$	3,642	$	—	$	—	$	3,642
	Liability Derivatives	$	3,771		$	—	$	3,771	$	—	$	7,849	$	11,620
		At December 31, 2014
		Gross			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in the				Net Amount
		Amounts of			Offset in the		Assets Presented in		Statement of Financial Position
		Recognized			Statement of Financial Position		the Statement of Financial Position
		Assets /Liabilities							Financial Instruments		Cash Collateral (Received) / Posted
		(In Thousands)
	Asset Derivatives	$	2,676		$	—	$	2,676	$	—	$	—	$	2,676
	Liability Derivatives	$	2,714		$	—	$	2,714	$	—	$	5,353	$	8,067

Earnings_per_Share_Tables

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of reconciliation of basic and diluted earnings per share (EPS)	The following table sets forth a reconciliation of basic and diluted earnings per share (“EPS”) for the periods indicated:
		Three Months Ended
		31-Mar-15				31-Mar-14
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	11,703	$	11,703	$	10,542	$	10,542
	Denominator:
	Weighted average shares outstanding	70,036,090		70,036,090		69,875,473		69,875,473
	Effect of dilutive securities	—		128,015		—		108,526
	Adjusted weighted average shares outstanding	70,036,090		70,164,105		69,875,473		69,983,999
	EPS	$	0.17	$	0.17	$	0.15	$	0.15

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair value of assets and liabilities
Schedule of the carrying value of assets and liabilities measured at fair value on a recurring basis	The following tables set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at the dates indicated:
		Carrying Value at March 31, 2015
		Level 1		Level 2			Level 3		Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	Debt securities:
	GSEs	$	—	$	23,253		$	—	$	23,253
	GSE CMOs	—		227,843			—		227,843
	GSE MBSs	—		271,034			—		271,034
	SBA commercial loan asset-backed securities	—		197			—		197
	Corporate debt obligations	—		40,541			—		40,541
	Trust preferred securities	—		1,262			—		1,262
	Total debt securities	—		564,130			—		564,130
	Marketable equity securities	985		—			—		985
	Total investment securities available-for-sale	$	985	$	564,130		$	—	$	565,115
	Interest-rate swaps	$	—	$	3,642		$	—	$	3,642
	Liabilities:
	Interest-rate swaps	$	—	$	3,771		$	—	$	3,771
		Carrying Value at 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
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:
		Three Months Ended March 31,
		2015		2014
		(In Thousands)
	Investment securities available-for-sale, beginning of period	$	—	$	1,775
	Total unrealized losses included in other comprehensive income	—		(85		)
	Investment securities available-for-sale, end of period	$	—	$	1,690
Summary of assets and liabilities measured at fair value on a non-recurring basis	The table below summarizes assets and liabilities measured at fair value on a non-recurring basis at the dates indicated:
		Carrying Value at March 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	$	—	$	—		$	16,530	$	16,530
	OREO	—		—			1,043		1,043
	Repossessed assets	—		980			—		980
	Total assets measured at fair value on a non-recurring basis	$	—	$	980		$	17,573	$	18,553
		Carrying Value at 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
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 and non-recurring basis at the dates indicated.
		Fair Value					Valuation Technique
		At March 31, 2015		At December 31, 2014
		(Dollars in Thousands)
	Collateral-dependent impaired loans and leases	$	16,530	$	6,376		Appraisal of collateral (1)
	Other real estate owned	$	1,043	$	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.
Excludes Financial Instruments For Which The Carrying Amount Approximates Fair Value
Fair value of assets and liabilities
Summary of assets and liabilities measured at fair value on a non-recurring basis	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		Estimated			Level 1		Level 2		Level 3
		Value		Fair Value			Inputs		Inputs		Inputs
		(In Thousands)
	At March 31, 2015
	Financial assets:
	Investment securities held-to-maturity	$	500	$	500		$	—	$	—	$	500
	Loans held-for-sale	787		787			—		787		—
	Loans and leases, net	4,579,488		4,592,417			—		—		4,592,417
	Financial liabilities:
	Certificates of deposit	1,051,580		1,061,059			—		1,061,059		—
	Borrowed funds	924,925		931,448			—		931,448		—
	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		—

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 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 March 31, 2015		At December 31, 2014
		(In Thousands)
	Financial instruments whose contract amounts represent credit risk:
	Commitments to originate loans and leases:
	Commercial real estate	$	56,739	$	107,179
	Commercial	74,264		102,353
	Residential mortgage	9,878		20,520
	Unadvanced portion of loans and leases	534,040		629,351
	Unused lines of credit:
	Home equity	249,810		244,603
	Other consumer	11,743		10,876
	Other commercial	859		728
	Unused letters of credit:
	Financial standby letters of credit	16,249		16,762
	Performance standby letters of credit	10		3,126
	Commercial and similar letters of credit	50		50
	Back-to-back interest-rate swaps	110,152		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:
		Minimum Rental Payments
		(In Thousands)
	Remainder of 2015	4,130
	Year ending:
	2016	5,354
	2017	4,831
	2018	4,275
	2019	3,361
	Thereafter	12,266
	Total	$	34,217

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
	bank
	office
Basis of Presentation
Number of full-service banking offices	24
FDIC insurance limit per depositor	$250,000
Number of banks on whose deposits insurance coverage was offered	3
Percentage of insurance offered	100.00%
Eastern Funding LLC
Basis of Presentation
Percentage of ownership in subsidiary	84.70%
BankRI
Basis of Presentation
Number of full-service banking offices	19
First Ipswich Bancorp:
Basis of Presentation
Number of full-service banking offices	5

Investment_Securities_Details

Investment Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Investment securities available-for-sale
Amortized Cost	$562,571,000	$553,588,000
Gross Unrealized Gains	5,235,000	3,128,000
Gross Unrealized Losses	2,691,000	5,955,000
Estimated fair value	565,115,000	550,761,000
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
Estimated fair value	565,115,000	550,761,000
Net unrealized gain (loss)	2,500,000	-2,800,000
Gross unrealized losses, fair value	193,981,000	335,683,000
Percentage of securities in unrealized loss positions	34.30%	60.90%
Available for sale securities pledged as collateral	483,900,000	473,100,000
Debt securities
Investment securities available-for-sale
Amortized Cost	561,621,000	552,641,000
Gross Unrealized Gains	5,200,000	3,102,000
Gross Unrealized Losses	2,691,000	5,955,000
Estimated fair value	564,130,000	549,788,000
Investment securities held-to-maturity
Estimated fair value	564,130,000	549,788,000
GSEs
Investment securities available-for-sale
Amortized Cost	22,890,000	22,929,000
Gross Unrealized Gains	363,000	88,000
Gross Unrealized Losses	0	29,000
Estimated fair value	23,253,000	22,988,000
Investment securities held-to-maturity
Estimated fair value	23,253,000	22,988,000
Net unrealized gain (loss)	400,000
Gross unrealized losses, fair value		11,086,000
GSE CMOs
Investment securities available-for-sale
Amortized Cost	229,591,000	238,910,000
Gross Unrealized Gains	342,000	80,000
Gross Unrealized Losses	2,090,000	4,821,000
Estimated fair value	227,843,000	234,169,000
Investment securities held-to-maturity
Estimated fair value	227,843,000	234,169,000
GSE MBSs
Investment securities available-for-sale
Amortized Cost	267,648,000	249,329,000
Gross Unrealized Gains	3,783,000	2,531,000
Gross Unrealized Losses	397,000	879,000
Estimated fair value	271,034,000	250,981,000
Investment securities held-to-maturity
Estimated fair value	271,034,000	250,981,000
SBA commercial loan asset-backed securities
Investment securities available-for-sale
Amortized Cost	199,000	205,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,000	2,000
Estimated fair value	197,000	203,000
Investment securities held-to-maturity
Estimated fair value	197,000	203,000
Gross unrealized losses, fair value	187,000	194,000
Corporate debt obligations
Investment securities available-for-sale
Amortized Cost	39,829,000	39,805,000
Gross Unrealized Gains	712,000	403,000
Gross Unrealized Losses	0	1,000
Estimated fair value	40,541,000	40,207,000
Investment securities held-to-maturity
Estimated fair value	40,541,000	40,207,000
Net unrealized gain (loss)	700,000	400,000
Gross unrealized losses, fair value		4,069,000
Trust preferred securities
Investment securities available-for-sale
Amortized Cost	1,464,000	1,463,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	202,000	223,000
Estimated fair value	1,262,000	1,240,000
Investment securities held-to-maturity
Estimated fair value	1,262,000	1,240,000
Net unrealized gain (loss)	-200,000	-200,000
Gross unrealized losses, fair value	1,262,000	1,240,000
Marketable equity securities
Investment securities available-for-sale
Amortized Cost	950,000	947,000
Gross Unrealized Gains	35,000	26,000
Gross Unrealized Losses	0	0
Estimated fair value	985,000	973,000
Investment securities held-to-maturity
Estimated fair value	$985,000	$973,000

Investment_Securities_Details_

Investment Securities (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Less than 12 months
Estimated Fair Value	$56,343	$104,357
Unrealized Losses	205	293
12 months or Longer
Estimated Fair Value	137,638	231,326
Unrealized Losses	2,486	5,662
Total
Estimated Fair Value	193,981	335,683
Unrealized Losses	2,691	5,955
GSE
Less than 12 months
Estimated Fair Value		11,086
Unrealized Losses		29
12 months or Longer
Estimated Fair Value		0
Unrealized Losses		0
Total
Estimated Fair Value		11,086
Unrealized Losses		29
GSE CMOs
Less than 12 months
Estimated Fair Value	40,851	39,095
Unrealized Losses	160	179
12 months or Longer
Estimated Fair Value	116,877	190,345
Unrealized Losses	1,930	4,642
Total
Estimated Fair Value	157,728	229,440
Unrealized Losses	2,090	4,821
GSE MBS
Less than 12 months
Estimated Fair Value	15,485	50,099
Unrealized Losses	45	84
12 months or Longer
Estimated Fair Value	19,319	39,555
Unrealized Losses	352	795
Total
Estimated Fair Value	34,804	89,654
Unrealized Losses	397	879
SBA commercial loan asset-backed securities
Less than 12 months
Estimated Fair Value	7	8
Unrealized Losses	0	0
12 months or Longer
Estimated Fair Value	180	186
Unrealized Losses	2	2
Total
Estimated Fair Value	187	194
Unrealized Losses	2	2
Corporate debt obligations
Less than 12 months
Estimated Fair Value		4,069
Unrealized Losses		1
12 months or Longer
Estimated Fair Value		0
Unrealized Losses		0
Total
Estimated Fair Value		4,069
Unrealized Losses		1
Trust preferred securities
Less than 12 months
Estimated Fair Value	0	0
Unrealized Losses	0	0
12 months or Longer
Estimated Fair Value	1,262	1,240
Unrealized Losses	202	223
Total
Estimated Fair Value	1,262	1,240
Unrealized Losses	$202	$223

Investment_Securities_Details_1

Investment Securities (Details 3) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investment Securities
Estimated fair value	$565,115,000		$550,761,000
Net unrealized gain (loss)	2,500,000		-2,800,000
Purchases of investment securities available-for-sale	29,466,000	48,516,000
U.S. Government-Sponsored Enterprises backed explicitly by the full faith and credit of the U.S. Government
Investment Securities
Estimated fair value	25,400,000		26,200,000
GSEs
Investment Securities
Estimated fair value	23,253,000		22,988,000
Net unrealized gain (loss)	400,000
Number of securities under unrealized loss position	0		4
Number of securities	8		8
GSE mortgage-related securities
Investment Securities
Estimated fair value	498,900,000		485,200,000
Net unrealized gain (loss)	1,600,000		-3,100,000
Number of securities under unrealized loss position	53		79
Number of securities	257		250
Purchases of investment securities available-for-sale	29,500,000	36,500,000
SBA commercial loan asset-backed securities
Investment Securities
Estimated fair value	197,000		203,000
Number of securities under unrealized loss position	7		7
Number of securities	8		8
Corporate debt obligations
Investment Securities
Estimated fair value	40,541,000		40,207,000
Net unrealized gain (loss)	700,000		400,000
Number of securities under unrealized loss position	0		1
Number of securities	13		13
Purchases of investment securities available-for-sale		12,000,000
Number of issuers defaulting on scheduled payments	0
Trust preferred securities
Investment Securities
Estimated fair value	1,262,000		1,240,000
Net unrealized gain (loss)	-200,000		-200,000
Number of securities under unrealized loss position	2		2
Number of securities	2		2
Number of issuers defaulting on scheduled payments	0
Marketable equity securities
Investment Securities
Estimated fair value	$985,000		$973,000
Number of securities under unrealized loss position			0

Investment_Securities_Details_2

Investment Securities (Details 4) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Amortized Cost	$500	$500
Investment securities held-to-maturity	$500	$500
Interest rate payable	1.30%

Investment_Securities_Details_3

Investment Securities (Details 5) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Available for Sale, Amortized Cost
Within 1 year	$5,985,000	$3,057,000
After 1 year through 5 years	55,299,000	55,631,000
After 5 years through 10 years	94,946,000	103,268,000
Over 10 years	405,392,000	390,685,000
Total	561,622,000	552,641,000
Available for Sale, Estimated Fair Value
Within 1 year	6,027,000	3,081,000
After 1 year through 5 years	56,593,000	56,586,000
After 5 years through 10 years	96,674,000	104,208,000
Over 10 years	404,837,000	385,913,000
Total	564,131,000	549,788,000
Available for Sale, Weighted Average Rate
Within 1 year (as a percent)	2.42%	3.00%
After 1 year through 5 years (as a percent)	2.46%	2.48%
After 5 years through 10 years (as a percent)	1.98%	2.00%
Over 10 years (as a percent)	1.91%	1.91%
Total (as a percent)	1.98%	1.99%
Held-to-maturity, Amortized Cost
Within 1 year	500,000	0
After 1 year through 5 years	0	500,000
Total	500,000	500,000
Held-to-maturity, Estimated Fair Value
Within 1 year	500,000	0
After 1 year through 5 years	0	500,000
Total	500,000	500,000
Held-to-maturity, Weighted Average Rate
Within 1 year (as a percent)	1.30%	0.00%
After 1 year through 5 years (as a percent)	0.00%	1.30%
Total (as a percent)	1.30%	1.30%
Estimated fair value of debt securities have right to call or prepay the obligations	12,000,000	16,100,000
Estimated fair value of debt securities have right to call or prepay the obligations, schedule maturities of 1-5 years	8,000,000	5,000,000
Estimated fair value of debt securities have right to call or prepay the obligations, schedule maturities of 6-10 years	4,000,000	9,900,000
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities after ten years		$1,200,000

Investment_Securities_Details_4

Investment Securities (Details 6) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Sales of securities	$0	$0

Loans_and_Leases_Details

Loans and Leases (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$4,073,490,000		$4,231,953,000
Originated, Weighted Average Coupon (as a percent)	4.41%		4.43%
Acquired loans	561,104,000		590,654,000
Acquired, Weighted Average Coupon (as a percent)	4.18%		4.19%
Total	4,634,594,000		4,822,607,000
Total, Weighted Average Coupon (as a percent)	4.39%		4.40%
Percentage of loans to aggregate outstanding amount in the greater New York/New Jersey metropolitan area	35.50%		35.90%
Percentage of loans to aggregate outstanding amount in Other areas of the United States	64.50%		64.10%
Proceeds from sale of loan portfolio	273,446,000	14,449,000
Loss on sale of loans	-869,000	-602,000
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	2,193,873,000		2,147,909,000
Originated, Weighted Average Coupon (as a percent)	4.12%		4.13%
Acquired loans	307,014,000		319,892,000
Acquired, Weighted Average Coupon (as a percent)	4.30%		4.34%
Total	2,500,887,000		2,467,801,000
Total, Weighted Average Coupon (as a percent)	4.14%		4.16%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	1,471,054,000		1,425,621,000
Originated, Weighted Average Coupon (as a percent)	4.16%		4.18%
Acquired loans	243,086,000		254,461,000
Acquired, Weighted Average Coupon (as a percent)	4.24%		4.29%
Total	1,714,140,000		1,680,082,000
Total, Weighted Average Coupon (as a percent)	4.17%		4.20%
Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	590,590,000		576,214,000
Originated, Weighted Average Coupon (as a percent)	4.10%		4.11%
Acquired loans	61,910,000		63,492,000
Acquired, Weighted Average Coupon (as a percent)	4.48%		4.50%
Total	652,500,000		639,706,000
Total, Weighted Average Coupon (as a percent)	4.13%		4.15%
Construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	132,229,000		146,074,000
Originated, Weighted Average Coupon (as a percent)	3.71%		3.79%
Acquired loans	2,018,000		1,939,000
Acquired, Weighted Average Coupon (as a percent)	5.42%		5.50%
Total	134,247,000		148,013,000
Total, Weighted Average Coupon (as a percent)	3.73%		3.81%
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	1,170,127,000		1,101,819,000
Originated, Weighted Average Coupon (as a percent)	5.44%		5.53%
Acquired loans	57,225,000		65,275,000
Acquired, Weighted Average Coupon (as a percent)	4.72%		4.58%
Total	1,227,352,000		1,167,094,000
Total, Weighted Average Coupon (as a percent)	5.41%		5.48%
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	515,375,000		462,730,000
Originated, Weighted Average Coupon (as a percent)	3.85%		3.88%
Acquired loans	44,969,000		51,347,000
Acquired, Weighted Average Coupon (as a percent)	4.33%		4.14%
Total	560,344,000		514,077,000
Total, Weighted Average Coupon (as a percent)	3.89%		3.91%
Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	602,045,000		587,496,000
Originated, Weighted Average Coupon (as a percent)	6.88%		6.92%
Acquired loans	12,256,000		13,928,000
Acquired, Weighted Average Coupon (as a percent)	6.14%		6.22%
Total	614,301,000		601,424,000
Total, Weighted Average Coupon (as a percent)	6.87%		6.90%
Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	52,707,000		51,593,000
Originated, Weighted Average Coupon (as a percent)	4.59%		4.60%
Acquired loans	0		0
Acquired, Weighted Average Coupon (as a percent)	0.00%		0.00%
Total	52,707,000		51,593,000
Total, Weighted Average Coupon (as a percent)	4.59%		4.60%
Indirect automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	23,335,000		316,987,000
Originated, Weighted Average Coupon (as a percent)	5.69%		4.47%
Acquired loans	0		0
Acquired, Weighted Average Coupon (as a percent)	0.00%		0.00%
Total	23,335,000		316,987,000
Total, Weighted Average Coupon (as a percent)	5.69%		4.47%
Percent of loan portfolio sold, over 90%	90.00%
Proceeds from sale of loan portfolio	255,200,000
Loss on sale of loans	11,800
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	686,155,000		665,238,000
Originated, Weighted Average Coupon (as a percent)	3.55%		3.56%
Acquired loans	196,865,000		205,487,000
Acquired, Weighted Average Coupon (as a percent)	3.84%		3.82%
Total	883,020,000		870,725,000
Total, Weighted Average Coupon (as a percent)	3.62%		3.62%
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	482,774,000		472,078,000
Originated, Weighted Average Coupon (as a percent)	3.59%		3.60%
Acquired loans	96,220,000		99,842,000
Acquired, Weighted Average Coupon (as a percent)	3.81%		3.77%
Total	578,994,000		571,920,000
Total, Weighted Average Coupon (as a percent)	3.63%		3.63%
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	191,715,000		181,580,000
Originated, Weighted Average Coupon (as a percent)	3.35%		3.35%
Acquired loans	100,483,000		105,478,000
Acquired, Weighted Average Coupon (as a percent)	3.85%		3.85%
Total	292,198,000		287,058,000
Total, Weighted Average Coupon (as a percent)	3.53%		3.53%
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	11,666,000		11,580,000
Originated, Weighted Average Coupon (as a percent)	4.95%		5.13%
Acquired loans	162,000		167,000
Acquired, Weighted Average Coupon (as a percent)	16.61%		16.35%
Total	$11,828,000		$11,747,000
Total, Weighted Average Coupon (as a percent)	5.11%		5.29%

Loans_and_Leases_Details_2

Loans and Leases (Details 2) (Acquired, USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Acquired
Summarized activity in accretable yield for the acquired loan portfolio
Balance at beginning of period	$32,044,000	$45,789,000
Reclassification from nonaccretable difference for loans with improved cash flows	1,440,000	1,440,000
Accretion	-2,824,000	-4,728,000
Balance at end of period	30,660,000	42,501,000
Aggregate remaining nonaccretable difference (representing both principal and interest) applicable to acquired loans	$2,100,000		$3,600,000

Loans_and_Leases_Details_3

Loans and Leases (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Loans and leases pledged as collateral	$2,000,000,000	$1,600,000,000
FRB borrowings	$0	$0

Allowance_for_Loan_and_Lease_L2

Allowance for Loan and Lease Losses (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Changes in allowance for loan losses
Balance at the beginning of the period	$53,659,000	$48,473,000
Charge-offs	-1,665,000	-1,050,000
Recoveries	811,000	384,000
Provision (credit) for loan and lease losses	2,301,000	2,417,000
Balance at the end of the period	55,106,000	50,224,000
Unfunded credit commitments liability included in other liabilities	1,200,000	1,100,000	1,300,000
Unfunded credit commitments liability charged off	0	0
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	2,301,000	2,417,000
Unfunded credit commitments	-38,000	26,000
Total provision for credit losses	2,263,000	2,443,000
General allowance for loan and lease losses	49,700,000		50,100,000
(Decrease) in general portion of the allowance for loan and lease losses	-400,000
Specific allowance for loan and lease losses	2,900,000		1,200,000
Increase in specific portion of the allowance for loan and lease losses	1,700,000
Unallocated allowance for loan and lease losses	2,500,000		2,400,000
Increase in unallocated portion of the allowance for loan and lease losses	100,000
Commercial Real Estate
Changes in allowance for loan losses
Balance at the beginning of the period	29,594,000	23,022,000
Charge-offs	-388,000	0
Recoveries	0	0
Provision (credit) for loan and lease losses	254,000	1,836,000
Balance at the end of the period	29,460,000	24,858,000
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	254,000	1,836,000
Number of loan classes within specific portfolio	3
Commercial
Changes in allowance for loan losses
Balance at the beginning of the period	15,957,000	15,220,000
Charge-offs	-450,000	-551,000
Recoveries	212,000	251,000
Provision (credit) for loan and lease losses	3,365,000	624,000
Balance at the end of the period	19,084,000	15,544,000
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	3,365,000	624,000
Number of loan classes within specific portfolio	3
Indirect Automobile
Changes in allowance for loan losses
Balance at the beginning of the period	2,331,000	3,924,000
Charge-offs	-820,000	-289,000
Recoveries	581,000	104,000
Provision (credit) for loan and lease losses	-1,634,000	-75,000
Balance at the end of the period	458,000	3,664,000
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	-1,634,000	-75,000
Release in general allowance resulting from the sale of portfolio	1,900,000
Consumer
Changes in allowance for loan losses
Balance at the beginning of the period	3,359,000	3,375,000
Charge-offs	-7,000	-210,000
Recoveries	18,000	29,000
Provision (credit) for loan and lease losses	249,000	-84,000
Balance at the end of the period	3,619,000	3,110,000
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	249,000	-84,000
Number of loan classes within specific portfolio	3
Unallocated
Changes in allowance for loan losses
Balance at the beginning of the period	2,418,000	2,932,000
Charge-offs	0	0
Recoveries	0	0
Provision (credit) for loan and lease losses	67,000	116,000
Balance at the end of the period	2,485,000	3,048,000
Provision (credit) for loan and lease losses:
Total provision for loan and lease losses	$67,000	$116,000

Allowance_for_Loan_and_Lease_L3

Allowance for Loan and Lease Losses (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Credit Quality Information
Recorded investment	$4,634,594	$4,822,607
Originated
Credit Quality Information
Recorded investment	4,073,490	4,231,953
Acquired
Credit Quality Information
Recorded investment	561,104	590,654
Commercial real estate mortgage
Credit Quality Information
Recorded investment	1,714,140	1,680,082
Commercial real estate mortgage | Originated
Credit Quality Information
Recorded investment	1,471,054	1,425,621
Commercial real estate mortgage | Acquired
Credit Quality Information
Recorded investment	243,086	254,461
Commercial real estate mortgage | Pass | Originated
Credit Quality Information
Recorded investment	1,454,500	1,402,121
Commercial real estate mortgage | Pass | Acquired
Credit Quality Information
Recorded investment	226,510	237,439
Commercial real estate mortgage | OAEM | Originated
Credit Quality Information
Recorded investment	13,368	22,491
Commercial real estate mortgage | OAEM | Acquired
Credit Quality Information
Recorded investment	8,177	8,351
Commercial real estate mortgage | Substandard | Originated
Credit Quality Information
Recorded investment	3,186	1,009
Commercial real estate mortgage | Substandard | Acquired
Credit Quality Information
Recorded investment	7,978	8,250
Commercial real estate mortgage | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Commercial real estate mortgage | Doubtful | Acquired
Credit Quality Information
Recorded investment	421	421
Multi-family mortgage
Credit Quality Information
Recorded investment	652,500	639,706
Multi-family mortgage | Originated
Credit Quality Information
Recorded investment	590,590	576,214
Multi-family mortgage | Acquired
Credit Quality Information
Recorded investment	61,910	63,492
Multi-family mortgage | Pass | Originated
Credit Quality Information
Recorded investment	589,373	574,972
Multi-family mortgage | Pass | Acquired
Credit Quality Information
Recorded investment	59,169	60,837
Multi-family mortgage | OAEM | Originated
Credit Quality Information
Recorded investment	1,217	1,242
Multi-family mortgage | OAEM | Acquired
Credit Quality Information
Recorded investment	1,008	713
Multi-family mortgage | Substandard | Originated
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage | Substandard | Acquired
Credit Quality Information
Recorded investment	1,733	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	134,247	148,013
Construction | Originated
Credit Quality Information
Recorded investment	132,229	146,074
Construction | Acquired
Credit Quality Information
Recorded investment	2,018	1,939
Construction | Pass | Originated
Credit Quality Information
Recorded investment	132,229	146,074
Construction | Pass | Acquired
Credit Quality Information
Recorded investment	1,791	1,709
Construction | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Construction | OAEM | Acquired
Credit Quality Information
Recorded investment	227	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	560,344	514,077
Commercial | Originated
Credit Quality Information
Recorded investment	515,375	462,730
Commercial | Acquired
Credit Quality Information
Recorded investment	44,969	51,347
Commercial | Pass | Originated
Credit Quality Information
Recorded investment	499,770	447,778
Commercial | Pass | Acquired
Credit Quality Information
Recorded investment	39,101	43,925
Commercial | OAEM | Originated
Credit Quality Information
Recorded investment	6,665	12,193
Commercial | OAEM | Acquired
Credit Quality Information
Recorded investment	1,568	1,852
Commercial | Substandard | Originated
Credit Quality Information
Recorded investment	7,997	1,671
Commercial | Substandard | Acquired
Credit Quality Information
Recorded investment	4,208	5,424
Commercial | Doubtful | Originated
Credit Quality Information
Recorded investment	943	1,088
Commercial | Doubtful | Acquired
Credit Quality Information
Recorded investment	92	146
Equipment Financing
Credit Quality Information
Recorded investment	614,301	601,424
Equipment Financing | Originated
Credit Quality Information
Recorded investment	602,045	587,496
Equipment Financing | Acquired
Credit Quality Information
Recorded investment	12,256	13,928
Equipment Financing | Pass | Originated
Credit Quality Information
Recorded investment	598,603	583,340
Equipment Financing | Pass | Acquired
Credit Quality Information
Recorded investment	12,186	13,795
Equipment Financing | OAEM | Originated
Credit Quality Information
Recorded investment	896	932
Equipment Financing | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Equipment Financing | Substandard | Originated
Credit Quality Information
Recorded investment	1,106	2,338
Equipment Financing | Substandard | Acquired
Credit Quality Information
Recorded investment	70	133
Equipment Financing | Doubtful | Originated
Credit Quality Information
Recorded investment	1,440	886
Equipment Financing | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association
Credit Quality Information
Recorded investment	52,707	51,593
Condominium association | Originated
Credit Quality Information
Recorded investment	52,707	51,593
Condominium association | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Pass | Originated
Credit Quality Information
Recorded investment	52,707	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	11,828	11,747
Other Consumer | Originated
Credit Quality Information
Recorded investment	11,666	11,580
Other Consumer | Acquired
Credit Quality Information
Recorded investment	162	167
Other Consumer | Pass | Originated
Credit Quality Information
Recorded investment	11,621	11,540
Other Consumer | Pass | Acquired
Credit Quality Information
Recorded investment	162	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	45	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
Indirect Automobile
Credit Quality Information
Recorded investment	23,335	316,987
Indirect Automobile | Originated
Credit Quality Information
Recorded investment	23,335	316,987
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Indirect Automobile | Acquired
Credit Quality Information
Recorded investment	0	0
Indirect Automobile | Credit score, Over 700 | Originated
Credit Quality Information
Recorded investment	15,915	262,160
Percentage of loans to aggregate outstanding amount	68.20%	82.70%
Indirect Automobile | Credit score, 661-700 | Originated
Credit Quality Information
Recorded investment	5,403	43,422
Percentage of loans to aggregate outstanding amount	23.20%	13.70%
Indirect Automobile | Credit score, 660 and below | Originated
Credit Quality Information
Recorded investment	1,781	9,927
Percentage of loans to aggregate outstanding amount	7.60%	3.10%
Indirect Automobile | Data not available | Originated
Credit Quality Information
Recorded investment	236	1,478
Percentage of loans to aggregate outstanding amount	1.00%	0.50%
Residential mortgage
Credit Quality Information
Recorded investment	578,994	571,920
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Residential mortgage | Originated
Credit Quality Information
Recorded investment	482,774	472,078
Percentage of loans to aggregate outstanding amount	83.30%	82.60%
Residential mortgage | Acquired
Credit Quality Information
Recorded investment	96,220	99,842
Percentage of loans to aggregate outstanding amount	16.70%	17.40%
Residential mortgage | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	105,225	105,342
Percentage of loans to aggregate outstanding amount	18.10%	18.40%
Residential mortgage | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	18,962	19,574
Percentage of loans to aggregate outstanding amount	3.30%	3.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	194,651	179,319
Percentage of loans to aggregate outstanding amount	33.60%	31.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	34,476	35,131
Percentage of loans to aggregate outstanding amount	6.00%	6.20%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	162,574	166,467
Percentage of loans to aggregate outstanding amount	28.10%	29.10%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	22,022	22,972
Percentage of loans to aggregate outstanding amount	3.80%	4.00%
Residential mortgage | Loan-to-value ratio, 80% and over | Originated
Credit Quality Information
Recorded investment	18,015	19,335
Percentage of loans to aggregate outstanding amount	3.10%	3.40%
Residential mortgage | Loan-to-value ratio, 80% and over | Acquired
Credit Quality Information
Recorded investment	16,114	16,268
Percentage of loans to aggregate outstanding amount	2.80%	2.80%
Residential mortgage | Data not available | Originated
Credit Quality Information
Recorded investment	2,309	1,615
Percentage of loans to aggregate outstanding amount	0.40%	0.30%
Residential mortgage | Data not available | Acquired
Credit Quality Information
Recorded investment	4,646	5,897
Percentage of loans to aggregate outstanding amount	0.80%	1.00%
Home Equity
Credit Quality Information
Recorded investment	292,198	287,058
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Home Equity | Originated
Credit Quality Information
Recorded investment	191,715	181,580
Percentage of loans to aggregate outstanding amount	65.70%	63.20%
Home Equity | Acquired
Credit Quality Information
Recorded investment	100,483	105,478
Percentage of loans to aggregate outstanding amount	34.30%	36.80%
Home Equity | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	122,455	113,541
Percentage of loans to aggregate outstanding amount	41.90%	39.60%
Home Equity | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	66,105	70,293
Percentage of loans to aggregate outstanding amount	22.60%	24.50%
Home Equity | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	37,398	35,660
Percentage of loans to aggregate outstanding amount	12.80%	12.40%
Home Equity | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	23,163	22,581
Percentage of loans to aggregate outstanding amount	7.90%	7.90%
Home Equity | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	27,437	27,123
Percentage of loans to aggregate outstanding amount	9.40%	9.40%
Home Equity | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	9,040	10,569
Percentage of loans to aggregate outstanding amount	3.10%	3.70%
Home Equity | Loan-to-value ratio, 80% and over | Originated
Credit Quality Information
Recorded investment	3,352	4,195
Percentage of loans to aggregate outstanding amount	1.20%	1.50%
Home Equity | Loan-to-value ratio, 80% and over | Acquired
Credit Quality Information
Recorded investment	1,170	1,178
Percentage of loans to aggregate outstanding amount	0.40%	0.40%
Home Equity | Data not available | Originated
Credit Quality Information
Recorded investment	1,073	1,061
Percentage of loans to aggregate outstanding amount	0.40%	0.40%
Home Equity | Data not available | Acquired
Credit Quality Information
Recorded investment	$1,005	$857
Percentage of loans to aggregate outstanding amount	0.30%	0.30%

Allowance_for_Loan_and_Lease_L4

Allowance for Loan and Lease Losses (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Age analysis of past due loans
Past due Total	$31,436	$34,920
Current	4,603,158	4,787,687
Total Loans and Leases	4,634,594	4,822,607
Loans and leases past due greater than 90 days and accruing	8,061	6,008
Nonaccrual loans and leases	22,734	13,714
Originated
Age analysis of past due loans
Past due Total	12,720	16,823
Current	4,060,770	4,215,130
Total Loans and Leases	4,073,490	4,231,953
Loans and leases past due greater than 90 days and accruing	0	2
Nonaccrual loans and leases	17,304	9,132
Acquired
Age analysis of past due loans
Past due Total	18,716	18,097
Current	542,388	572,557
Total Loans and Leases	561,104	590,654
Loans and leases past due greater than 90 days and accruing	8,061	6,006
Nonaccrual loans and leases	5,430	4,582
Commercial real estate loans
Age analysis of past due loans
Total Loans and Leases	2,500,887	2,467,801
Commercial real estate loans | Originated
Age analysis of past due loans
Past due Total	1,501	2,592
Current	2,192,372	2,145,317
Total Loans and Leases	2,193,873	2,147,909
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	3,135	1,009
Commercial real estate loans | Acquired
Age analysis of past due loans
Past due Total	9,858	8,368
Current	297,156	311,524
Total Loans and Leases	307,014	319,892
Loans and leases past due greater than 90 days and accruing	5,253	2,750
Nonaccrual loans and leases	115	0
Commercial real estate mortgage
Age analysis of past due loans
Total Loans and Leases	1,714,140	1,680,082
Commercial real estate mortgage | Originated
Age analysis of past due loans
Past due Total	1,501	2,207
Current	1,469,553	1,423,414
Total Loans and Leases	1,471,054	1,425,621
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	3,135	1,009
Commercial real estate mortgage | Acquired
Age analysis of past due loans
Past due Total	6,753	7,081
Current	236,333	247,380
Total Loans and Leases	243,086	254,461
Loans and leases past due greater than 90 days and accruing	3,065	2,387
Nonaccrual loans and leases	115	0
Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	652,500	639,706
Multi-family mortgage | Originated
Age analysis of past due loans
Past due Total	0	385
Current	590,590	575,829
Total Loans and Leases	590,590	576,214
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	0
Multi-family mortgage | Acquired
Age analysis of past due loans
Past due Total	2,878	1,287
Current	59,032	62,205
Total Loans and Leases	61,910	63,492
Loans and leases past due greater than 90 days and accruing	2,188	363
Nonaccrual loans and leases	0	0
Construction
Age analysis of past due loans
Total Loans and Leases	134,247	148,013
Construction | Originated
Age analysis of past due loans
Past due Total	0	0
Current	132,229	146,074
Total Loans and Leases	132,229	146,074
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	0
Construction | Acquired
Age analysis of past due loans
Past due Total	227	0
Current	1,791	1,939
Total Loans and Leases	2,018	1,939
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	0
Commercial loans
Age analysis of past due loans
Total Loans and Leases	1,227,352	1,167,094
Commercial loans | Originated
Age analysis of past due loans
Past due Total	7,077	7,698
Current	1,163,050	1,094,121
Total Loans and Leases	1,170,127	1,101,819
Loans and leases past due greater than 90 days and accruing	0	2
Nonaccrual loans and leases	11,131	5,936
Commercial loans | Acquired
Age analysis of past due loans
Past due Total	4,313	4,353
Current	52,912	60,922
Total Loans and Leases	57,225	65,275
Loans and leases past due greater than 90 days and accruing	696	697
Nonaccrual loans and leases	3,229	2,483
Commercial
Age analysis of past due loans
Total Loans and Leases	560,344	514,077
Commercial | Originated
Age analysis of past due loans
Past due Total	2,925	3,133
Current	512,450	459,597
Total Loans and Leases	515,375	462,730
Loans and leases past due greater than 90 days and accruing	0	2
Nonaccrual loans and leases	8,810	2,722
Commercial | Acquired
Age analysis of past due loans
Past due Total	4,251	4,233
Current	40,718	47,114
Total Loans and Leases	44,969	51,347
Loans and leases past due greater than 90 days and accruing	624	624
Nonaccrual loans and leases	3,229	2,474
Equipment financing
Age analysis of past due loans
Total Loans and Leases	614,301	601,424
Equipment financing | Originated
Age analysis of past due loans
Past due Total	3,789	4,064
Current	598,256	583,432
Total Loans and Leases	602,045	587,496
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	2,321	3,214
Equipment financing | Acquired
Age analysis of past due loans
Past due Total	62	120
Current	12,194	13,808
Total Loans and Leases	12,256	13,928
Loans and leases past due greater than 90 days and accruing	72	73
Nonaccrual loans and leases	0	9
Condominium association
Age analysis of past due loans
Total Loans and Leases	52,707	51,593
Condominium association | Originated
Age analysis of past due loans
Past due Total	363	501
Current	52,344	51,092
Total Loans and Leases	52,707	51,593
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	0
Condominium association | Acquired
Age analysis of past due loans
Total Loans and Leases	0	0
Indirect automobile
Age analysis of past due loans
Total Loans and Leases	23,335	316,987
Indirect automobile | Originated
Age analysis of past due loans
Past due Total	2,711	5,724
Current	20,624	311,263
Total Loans and Leases	23,335	316,987
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	468	645
Indirect automobile | Acquired
Age analysis of past due loans
Total Loans and Leases	0	0
Consumer loans
Age analysis of past due loans
Total Loans and Leases	883,020	870,725
Consumer loans | Originated
Age analysis of past due loans
Past due Total	1,431	809
Current	684,724	664,429
Total Loans and Leases	686,155	665,238
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	2,570	1,542
Consumer loans | Acquired
Age analysis of past due loans
Past due Total	4,545	5,376
Current	192,320	200,111
Total Loans and Leases	196,865	205,487
Loans and leases past due greater than 90 days and accruing	2,112	2,559
Nonaccrual loans and leases	2,086	2,099
Residential mortgage
Age analysis of past due loans
Total Loans and Leases	578,994	571,920
Residential mortgage | Originated
Age analysis of past due loans
Past due Total	1,001	501
Current	481,773	471,577
Total Loans and Leases	482,774	472,078
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	2,290	1,340
Residential mortgage | Acquired
Age analysis of past due loans
Past due Total	2,536	2,715
Current	93,684	97,127
Total Loans and Leases	96,220	99,842
Loans and leases past due greater than 90 days and accruing	2,077	2,372
Nonaccrual loans and leases	342	342
Home equity
Age analysis of past due loans
Total Loans and Leases	292,198	287,058
Home equity | Originated
Age analysis of past due loans
Past due Total	363	256
Current	191,352	181,324
Total Loans and Leases	191,715	181,580
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	235	161
Home equity | Acquired
Age analysis of past due loans
Past due Total	2,009	2,661
Current	98,474	102,817
Total Loans and Leases	100,483	105,478
Loans and leases past due greater than 90 days and accruing	35	187
Nonaccrual loans and leases	1,744	1,757
Other consumer
Age analysis of past due loans
Total Loans and Leases	11,828	11,747
Other consumer | Originated
Age analysis of past due loans
Past due Total	67	52
Current	11,599	11,528
Total Loans and Leases	11,666	11,580
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	45	41
Other consumer | Acquired
Age analysis of past due loans
Past due Total	0	0
Current	162	167
Total Loans and Leases	162	167
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	0
31-60 Days
Age analysis of past due loans
Past due Total	10,489	12,439
31-60 Days | Originated
Age analysis of past due loans
Past due Total	5,307	9,536
31-60 Days | Acquired
Age analysis of past due loans
Past due Total	5,182	2,903
31-60 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past due Total	179	2,016
31-60 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past due Total	3,876	1,184
31-60 Days | Commercial real estate mortgage | Originated
Age analysis of past due loans
Past due Total	179	1,631
31-60 Days | Commercial real estate mortgage | Acquired
Age analysis of past due loans
Past due Total	3,186	989
31-60 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past due Total	0	385
31-60 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past due Total	690	195
31-60 Days | Construction | Originated
Age analysis of past due loans
Past due Total	0	0
31-60 Days | Construction | Acquired
Age analysis of past due loans
Past due Total	0	0
31-60 Days | Commercial loans | Originated
Age analysis of past due loans
Past due Total	2,815	2,793
31-60 Days | Commercial loans | Acquired
Age analysis of past due loans
Past due Total	348	714
31-60 Days | Commercial | Originated
Age analysis of past due loans
Past due Total	793	758
31-60 Days | Commercial | Acquired
Age analysis of past due loans
Past due Total	348	712
31-60 Days | Equipment financing | Originated
Age analysis of past due loans
Past due Total	1,659	1,534
31-60 Days | Equipment financing | Acquired
Age analysis of past due loans
Past due Total	0	2
31-60 Days | Condominium association | Originated
Age analysis of past due loans
Past due Total	363	501
31-60 Days | Indirect automobile | Originated
Age analysis of past due loans
Past due Total	1,957	4,635
31-60 Days | Consumer loans | Originated
Age analysis of past due loans
Past due Total	356	92
31-60 Days | Consumer loans | Acquired
Age analysis of past due loans
Past due Total	958	1,005
31-60 Days | Residential mortgage | Originated
Age analysis of past due loans
Past due Total	173	0
31-60 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past due Total	66	0
31-60 Days | Home equity | Originated
Age analysis of past due loans
Past due Total	159	75
31-60 Days | Home equity | Acquired
Age analysis of past due loans
Past due Total	892	1,005
31-60 Days | Other consumer | Originated
Age analysis of past due loans
Past due Total	24	17
31-60 Days | Other consumer | Acquired
Age analysis of past due loans
Past due Total	0	0
61-90 Days
Age analysis of past due loans
Past due Total	3,896	8,117
61-90 Days | Originated
Age analysis of past due loans
Past due Total	2,488	2,410
61-90 Days | Acquired
Age analysis of past due loans
Past due Total	1,408	5,707
61-90 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past due Total	1,122	416
61-90 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past due Total	614	4,434
61-90 Days | Commercial real estate mortgage | Originated
Age analysis of past due loans
Past due Total	1,122	416
61-90 Days | Commercial real estate mortgage | Acquired
Age analysis of past due loans
Past due Total	387	3,705
61-90 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past due Total	0	0
61-90 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past due Total	0	729
61-90 Days | Construction | Originated
Age analysis of past due loans
Past due Total	0	0
61-90 Days | Construction | Acquired
Age analysis of past due loans
Past due Total	227	0
61-90 Days | Commercial loans | Originated
Age analysis of past due loans
Past due Total	407	1,014
61-90 Days | Commercial loans | Acquired
Age analysis of past due loans
Past due Total	594	540
61-90 Days | Commercial | Originated
Age analysis of past due loans
Past due Total	52	876
61-90 Days | Commercial | Acquired
Age analysis of past due loans
Past due Total	594	488
61-90 Days | Equipment financing | Originated
Age analysis of past due loans
Past due Total	355	138
61-90 Days | Equipment financing | Acquired
Age analysis of past due loans
Past due Total	0	52
61-90 Days | Condominium association | Originated
Age analysis of past due loans
Past due Total	0	0
61-90 Days | Indirect automobile | Originated
Age analysis of past due loans
Past due Total	624	923
61-90 Days | Consumer loans | Originated
Age analysis of past due loans
Past due Total	335	57
61-90 Days | Consumer loans | Acquired
Age analysis of past due loans
Past due Total	200	733
61-90 Days | Residential mortgage | Originated
Age analysis of past due loans
Past due Total	329	0
61-90 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past due Total	51	0
61-90 Days | Home equity | Originated
Age analysis of past due loans
Past due Total	0	52
61-90 Days | Home equity | Acquired
Age analysis of past due loans
Past due Total	149	733
61-90 Days | Other consumer | Originated
Age analysis of past due loans
Past due Total	6	5
61-90 Days | Other consumer | Acquired
Age analysis of past due loans
Past due Total	0	0
Greater than 90 Days
Age analysis of past due loans
Past due Total	17,051	14,364
Greater than 90 Days | Originated
Age analysis of past due loans
Past due Total	4,925	4,877
Greater than 90 Days | Acquired
Age analysis of past due loans
Past due Total	12,126	9,487
Greater than 90 Days | Commercial real estate loans | Originated
Age analysis of past due loans
Past due Total	200	160
Greater than 90 Days | Commercial real estate loans | Acquired
Age analysis of past due loans
Past due Total	5,368	2,750
Greater than 90 Days | Commercial real estate mortgage | Originated
Age analysis of past due loans
Past due Total	200	160
Greater than 90 Days | Commercial real estate mortgage | Acquired
Age analysis of past due loans
Past due Total	3,180	2,387
Greater than 90 Days | Multi-family mortgage | Originated
Age analysis of past due loans
Past due Total	0	0
Greater than 90 Days | Multi-family mortgage | Acquired
Age analysis of past due loans
Past due Total	2,188	363
Greater than 90 Days | Construction | Originated
Age analysis of past due loans
Past due Total	0	0
Greater than 90 Days | Construction | Acquired
Age analysis of past due loans
Past due Total	0	0
Greater than 90 Days | Commercial loans | Originated
Age analysis of past due loans
Past due Total	3,855	3,891
Greater than 90 Days | Commercial loans | Acquired
Age analysis of past due loans
Past due Total	3,371	3,099
Greater than 90 Days | Commercial | Originated
Age analysis of past due loans
Past due Total	2,080	1,499
Greater than 90 Days | Commercial | Acquired
Age analysis of past due loans
Past due Total	3,309	3,033
Greater than 90 Days | Equipment financing | Originated
Age analysis of past due loans
Past due Total	1,775	2,392
Greater than 90 Days | Equipment financing | Acquired
Age analysis of past due loans
Past due Total	62	66
Greater than 90 Days | Condominium association | Originated
Age analysis of past due loans
Past due Total	0	0
Greater than 90 Days | Indirect automobile | Originated
Age analysis of past due loans
Past due Total	130	166
Greater than 90 Days | Consumer loans | Originated
Age analysis of past due loans
Past due Total	740	660
Greater than 90 Days | Consumer loans | Acquired
Age analysis of past due loans
Past due Total	3,387	3,638
Greater than 90 Days | Residential mortgage | Originated
Age analysis of past due loans
Past due Total	499	501
Greater than 90 Days | Residential mortgage | Acquired
Age analysis of past due loans
Past due Total	2,419	2,715
Greater than 90 Days | Home equity | Originated
Age analysis of past due loans
Past due Total	204	129
Greater than 90 Days | Home equity | Acquired
Age analysis of past due loans
Past due Total	968	923
Greater than 90 Days | Other consumer | Originated
Age analysis of past due loans
Past due Total	37	30
Greater than 90 Days | Other consumer | Acquired
Age analysis of past due loans
Past due Total	$0	$0

Allowance_for_Loan_and_Lease_L5

Allowance for Loan and Lease Losses (Details 4)	Mar. 31, 2015
	class
Commercial real estate loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	3
Commercial real estate
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	37.00%
Multi-family mortgage
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	14.10%
Construction loans
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	2.90%
Commercial loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	3
Commercial
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	12.10%
Equipment financing
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	13.30%
Condominium association
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	1.10%
Indirect automobile
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	0.50%
Consumer loans
Allowance for loan losses and recorded investment in loans
Number of loan classes within specific portfolio	3
Minimum loan-to-value ratio needed for loans to be made	80.00%
Residential
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	12.50%
Home equity
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	6.30%
Other consumer
Allowance for loan losses and recorded investment in loans
Percentage of loans to aggregate outstanding amount	0.30%

Allowance_for_Loan_and_Lease_L6

Allowance for Loan and Lease Losses (Details 5) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Impaired Loans and Leases
Recorded investment	$57,230,000		$48,657,000
Unpaid principal balance	57,202,000		48,633,000
Related allowance	2,876,000		1,163,000
Average recorded investment	58,081,000	44,764,000
Interest income recognized, Total	311,000	206,000
Recorded investment in loans and leases by portfolio segment
Total, Allowance	55,106,000		53,659,000
Total Loans and Leases	4,634,594,000		4,822,607,000
Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	24,011,000		19,246,000
Recorded investment, loans with related allowance recorded	9,997,000		6,314,000
Recorded investment	34,008,000		25,560,000
Recorded investment, nonaccrual loans	15,600,000		7,100,000
Unpaid principal balance with no related allowance recorded	23,979,000		19,217,000
Unpaid principal balance with related allowance recorded	9,988,000		6,306,000
Unpaid principal balance	33,967,000		25,523,000
Related allowance	2,519,000		886,000
Average recorded investment with no related allowance recorded	24,239,000	11,610,000
Average recorded investment with related allowance recorded	10,143,000	4,119,000
Average recorded investment	34,382,000	15,729,000
Interest income recognized with no related allowance recorded	189,000	57,000
Interest income recognized with related allowance recorded	53,000	24,000
Interest income recognized, Total	242,000	81,000
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	2,519,000		886,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	49,676,000		49,925,000
Total, Allowance	52,195,000		50,811,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	34,008,000		25,560,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	4,039,482,000		4,206,393,000
Total Loans and Leases	4,073,490,000		4,231,953,000
Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	21,755,000		22,150,000
Recorded investment, loans with related allowance recorded	1,467,000		947,000
Recorded investment	23,222,000		23,097,000
Recorded investment, nonaccrual loans	5,300,000		4,600,000
Unpaid principal balance with no related allowance recorded	21,768,000		22,163,000
Unpaid principal balance with related allowance recorded	1,467,000		947,000
Unpaid principal balance	23,235,000		23,110,000
Related allowance	357,000		277,000
Average recorded investment with no related allowance recorded	22,223,000	24,069,000
Average recorded investment with related allowance recorded	1,476,000	4,966,000
Average recorded investment	23,699,000	29,035,000
Interest income recognized with no related allowance recorded	67,000	87,000
Interest income recognized with related allowance recorded	2,000	38,000
Interest income recognized, Total	69,000	125,000
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	255,000		185,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	874,000		872,000
Total, Allowance	2,911,000		2,848,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	8,220,000		7,646,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	249,958,000		270,618,000
Total Loans and Leases	561,104,000		590,654,000
Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	1,782,000		1,791,000
Total Loans and Leases	302,926,000		312,390,000
Commercial real estate loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	29,460,000		29,594,000
Total Loans and Leases	2,500,887,000		2,467,801,000
Commercial real estate loans | Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,914,000		2,751,000
Recorded investment, loans with related allowance recorded	4,102,000		4,119,000
Unpaid principal balance with no related allowance recorded	4,909,000		2,748,000
Unpaid principal balance with related allowance recorded	4,102,000		4,119,000
Related allowance	98,000		108,000
Average recorded investment with no related allowance recorded	4,928,000	3,898,000
Average recorded investment with related allowance recorded	4,109,000	164,000
Interest income recognized with no related allowance recorded	22,000	36,000
Interest income recognized with related allowance recorded	50,000	0
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	98,000		108,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	27,491,000		27,457,000
Total, Allowance	27,589,000		27,565,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	9,016,000		6,870,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	2,184,857,000		2,141,039,000
Total Loans and Leases	2,193,873,000		2,147,909,000
Commercial real estate loans | Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	10,011,000		9,413,000
Recorded investment, loans with related allowance recorded	243,000		244,000
Unpaid principal balance with no related allowance recorded	10,026,000		9,428,000
Unpaid principal balance with related allowance recorded	243,000		244,000
Related allowance	23,000		22,000
Average recorded investment with no related allowance recorded	10,329,000	7,577,000
Average recorded investment with related allowance recorded	244,000	4,420,000
Interest income recognized with no related allowance recorded	37,000	46,000
Interest income recognized with related allowance recorded	0	37,000
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	0		0
Loans and Leases Collectively Evaluated for Impairment, Allowance	634,000		648,000
Total, Allowance	1,871,000		2,029,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	615,000		626,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	91,081,000		97,141,000
Total Loans and Leases	307,014,000		319,892,000
Commercial real estate loans | Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	1,237,000		1,381,000
Total Loans and Leases	215,318,000		222,125,000
Commercial
Recorded investment in loans and leases by portfolio segment
Total, Allowance	19,084,000		15,957,000
Total Loans and Leases	1,227,352,000		1,167,094,000
Commercial | Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	15,020,000		13,440,000
Recorded investment, loans with related allowance recorded	5,726,000		2,019,000
Unpaid principal balance with no related allowance recorded	14,998,000		13,421,000
Unpaid principal balance with related allowance recorded	5,717,000		2,011,000
Related allowance	2,411,000		768,000
Average recorded investment with no related allowance recorded	15,231,000	3,880,000
Average recorded investment with related allowance recorded	5,862,000	3,657,000
Interest income recognized with no related allowance recorded	152,000	8,000
Interest income recognized with related allowance recorded	3,000	24,000
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	2,411,000		768,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	16,078,000		14,631,000
Total, Allowance	18,489,000		15,399,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	20,746,000		15,459,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	1,149,381,000		1,086,360,000
Total Loans and Leases	1,170,127,000		1,101,819,000
Commercial | Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,379,000		6,049,000
Recorded investment, loans with related allowance recorded	872,000		478,000
Unpaid principal balance with no related allowance recorded	4,376,000		6,047,000
Unpaid principal balance with related allowance recorded	872,000		478,000
Related allowance	287,000		214,000
Average recorded investment with no related allowance recorded	4,503,000	8,221,000
Average recorded investment with related allowance recorded	872,000	546,000
Interest income recognized with no related allowance recorded	15,000	36,000
Interest income recognized with related allowance recorded	0	1,000
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	208,000		144,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	217,000		222,000
Total, Allowance	595,000		558,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	4,294,000		4,458,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	31,615,000		38,504,000
Total Loans and Leases	57,225,000		65,275,000
Commercial | Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	170,000		192,000
Total Loans and Leases	21,316,000		22,313,000
Indirect automobile
Recorded investment in loans and leases by portfolio segment
Total, Allowance	458,000		2,331,000
Total Loans and Leases	23,335,000		316,987,000
Indirect automobile | Originated
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	0		0
Loans and Leases Collectively Evaluated for Impairment, Allowance	458,000		2,331,000
Total, Allowance	458,000		2,331,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	23,335,000		316,987,000
Total Loans and Leases	23,335,000		316,987,000
Indirect automobile | Acquired
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	0		0
Loans and Leases Collectively Evaluated for Impairment, Allowance	0		0
Total, Allowance	0		0
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		0
Total Loans and Leases	0		0
Indirect automobile | Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	0		0
Total Loans and Leases	0		0
Consumer loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	3,619,000		3,359,000
Total Loans and Leases	883,020,000		870,725,000
Consumer loans | Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,077,000		3,055,000
Recorded investment, loans with related allowance recorded	169,000		176,000
Unpaid principal balance with no related allowance recorded	4,072,000		3,048,000
Unpaid principal balance with related allowance recorded	169,000		176,000
Related allowance	10,000		10,000
Average recorded investment with no related allowance recorded	4,080,000	3,832,000
Average recorded investment with related allowance recorded	172,000	298,000
Interest income recognized with no related allowance recorded	15,000	13,000
Interest income recognized with related allowance recorded	0	0
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	10,000		10,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	3,164,000		3,088,000
Total, Allowance	3,174,000		3,098,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	4,246,000		3,231,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	681,909,000		662,007,000
Total Loans and Leases	686,155,000		665,238,000
Consumer loans | Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	7,365,000		6,688,000
Recorded investment, loans with related allowance recorded	352,000		225,000
Unpaid principal balance with no related allowance recorded	7,366,000		6,688,000
Unpaid principal balance with related allowance recorded	352,000		225,000
Related allowance	47,000		41,000
Average recorded investment with no related allowance recorded	7,391,000	8,271,000
Average recorded investment with related allowance recorded	360,000	0
Interest income recognized with no related allowance recorded	15,000	5,000
Interest income recognized with related allowance recorded	2,000	0
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	47,000		41,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	23,000		2,000
Total, Allowance	445,000		261,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	3,311,000		2,562,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	127,262,000		134,973,000
Total Loans and Leases	196,865,000		205,487,000
Consumer loans | Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	375,000		218,000
Total Loans and Leases	66,292,000		67,952,000
Unallocated
Recorded investment in loans and leases by portfolio segment
Total, Allowance	2,485,000		2,418,000
Total Loans and Leases	0		0
Unallocated | Originated
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	0		0
Loans and Leases Collectively Evaluated for Impairment, Allowance	2,485,000		2,418,000
Total, Allowance	2,485,000		2,418,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		0
Total Loans and Leases	0		0
Unallocated | Acquired
Recorded investment in loans and leases by portfolio segment
Loans and Leases Individually Evaluated for Impairment, Allowance	0		0
Loans and Leases Collectively Evaluated for Impairment, Allowance	0		0
Total, Allowance	0		0
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		0
Total Loans and Leases	0		0
Unallocated | Acquired | Receivables Acquired with Deteriorated Credit Quality [Member]
Recorded investment in loans and leases by portfolio segment
Total, Allowance	0		0
Total Loans and Leases	$0		$0

Allowance_for_Loan_and_Lease_L7

Allowance for Loan and Lease Losses (Details 6) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	loan	loan
Troubled debt restructurings:
On accrual	$14,184,000		$14,815,000
On nonaccrual	6,126,000		5,625,000
Total troubled debt restructurings	20,310,000		20,440,000
Number of loans	6	3
Recorded Investment, At modification	2,834,000	1,835,000
Recorded Investment, At end of period	2,833,000	1,831,000
Specific Allowance for Loan and Lease Losses	12,000	0
Nonaccrual Loans and Leases/Recorded Investment	261,000	880,000
Defaulted, number of loans/leases	4	2
Defaulted, recorded investment	1,145,000	266,000
Total loans with one modification	265,000	880,000
Total loans with more than one modification	2,568,000	951,000
Financial impact of modification of performing and nonperforming loans	30,000	0
Commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings	0	0
Originated
Troubled debt restructurings:
Number of loans	4
Recorded Investment, At modification	2,681,000
Recorded Investment, At end of period	2,680,000
Specific Allowance for Loan and Lease Losses	0
Nonaccrual Loans and Leases/Recorded Investment	248,000
Defaulted, number of loans/leases	2
Defaulted, recorded investment	739,000
Acquired
Troubled debt restructurings:
Number of loans	2
Recorded Investment, At modification	153,000
Recorded Investment, At end of period	153,000
Specific Allowance for Loan and Lease Losses	12,000
Nonaccrual Loans and Leases/Recorded Investment	13,000
Defaulted, number of loans/leases	2
Defaulted, recorded investment	406,000
Extended maturity
Troubled debt restructurings:
Total loans with more than one modification	2,568,000	951,000
Adjusted interest rate
Troubled debt restructurings:
Total loans with one modification	140,000	880,000
Combination of maturity, principal, interest rate
Troubled debt restructurings:
Total loans with one modification	125,000	0
Commercial real estate mortgage | Originated
Troubled debt restructurings:
Number of loans		1
Recorded Investment, At modification		953,000
Recorded Investment, At end of period		951,000
Specific Allowance for Loan and Lease Losses		0
Nonaccrual Loans and Leases/Recorded Investment		0
Defaulted, number of loans/leases		0
Defaulted, recorded investment		0
Commercial | Originated
Troubled debt restructurings:
Number of loans	3
Recorded Investment, At modification	2,569,000
Recorded Investment, At end of period	2,568,000
Specific Allowance for Loan and Lease Losses	0
Nonaccrual Loans and Leases/Recorded Investment	248,000
Defaulted, number of loans/leases	1
Defaulted, recorded investment	248,000
Commercial | Acquired
Troubled debt restructurings:
Number of loans	1
Recorded Investment, At modification	13,000
Recorded Investment, At end of period	13,000
Specific Allowance for Loan and Lease Losses	0
Nonaccrual Loans and Leases/Recorded Investment	13,000
Defaulted, number of loans/leases	2
Defaulted, recorded investment	406,000
Equipment financing | Originated
Troubled debt restructurings:
Number of loans	1	1
Recorded Investment, At modification	112,000	384,000
Recorded Investment, At end of period	112,000	382,000
Specific Allowance for Loan and Lease Losses	0	0
Nonaccrual Loans and Leases/Recorded Investment	0	382,000
Defaulted, number of loans/leases	1	2
Defaulted, recorded investment	491,000	266,000
Residential mortgage | Originated
Troubled debt restructurings:
Number of loans		1
Recorded Investment, At modification		498,000
Recorded Investment, At end of period		498,000
Specific Allowance for Loan and Lease Losses		0
Nonaccrual Loans and Leases/Recorded Investment		498,000
Defaulted, number of loans/leases		0
Defaulted, recorded investment		0
Residential mortgage | Acquired
Troubled debt restructurings:
Number of loans	1
Recorded Investment, At modification	140,000
Recorded Investment, At end of period	140,000
Specific Allowance for Loan and Lease Losses	12,000
Nonaccrual Loans and Leases/Recorded Investment	0
Defaulted, number of loans/leases	0
Defaulted, recorded investment	$0

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Proceeds from sales or premises and equipment	$0	$1,972,000
Carrying value of premises and equipment	79,252,000			80,619,000
Gain on sale/disposals of premises and equipment, net	0	1,510,000
Facility
Property, Plant and Equipment [Line Items]
Proceeds from sales or premises and equipment			2,200,000
Carrying value of premises and equipment			400,000
Cost of sale		200,000
Gain on sale/disposals of premises and equipment, net		$1,600,000

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill	$137,890	$137,890
Total other intangible assets	12,806	13,544
Total goodwill and other intangible assets	150,696	151,434
Trade name
Schedule of Goodwill and Intangible Assets [Line Items]
Total other intangible assets	1,089	1,089
Core deposits
Schedule of Goodwill and Intangible Assets [Line Items]
Total other intangible assets	$11,717	$12,455

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details 2) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Scheduled amortization expense attributable to other acquisition-related intangible assets
Remainder of 2015	$2,173
Year ending:
2016	2,500
2017	2,089
2018	1,669
2019	1,295
Thereafter	1,991
Total	$11,717

Investments_in_Qualified_Affor2

Investments in Qualified Affordable Housing Projects - Additional Information (Details) (USD $)	Mar. 31, 2015	Jan. 01, 2015
In Millions, unless otherwise specified	project
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of affordable housing project investments	8
Accounting Standards Update 2014-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings		$1.10

Investments_in_Qualified_Affor3

Investments in Qualified Affordable Housing Projects - Further Information Regarding Investments in Affordable Housing Projects (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing projects included in other assets	$10,790	$10,313
Unfunded commitments related to affordable housing projects included in other liabilities	2,338	2,608
Investments in affordable housing projects tax credits included in other liabilities	397
Investments in affordable housing projects tax benefits included in other liabilities	164
Investment amortization included in pretax income	410
Amount recognized as income tax benefit	$151

Investments_in_Qualified_Affor4

Investments in Qualified Affordable Housing Projects - Prior Period Adjustments (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$79,526	[1]			$80,479	[1]
Retained earnings	90,589	[1]			84,860	[1]
Provision for income taxes	7,104	[1]	6,379	[1]
Net income	11,703	[1]	10,542	[1]
EPS, Basic (in dollars per share)	$0.17	[1]	$0.15	[1]
Accounting Standards Update 2014-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets					80,479
Retained earnings					84,860
Loss from investments in affordable housing projects, as reported			0
Provision for income taxes			6,379
Net income			10,542
EPS, Basic (in dollars per share)			$0.15
Effective tax rate			36.78%
Accounting Standards Update 2014-01 [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets					79,411
Retained earnings					83,792
Loss from investments in affordable housing projects, as reported			504
Provision for income taxes			5,995
Net income			10,422
EPS, Basic (in dollars per share)			$0.15
Effective tax rate			35.60%
Accounting Standards Update 2014-01 [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets					1,068
Retained earnings					1,068
Loss from investments in affordable housing projects, as reported			-504
Provision for income taxes			384
Net income			$120
EPS, Basic (in dollars per share)			$0
Effective tax rate			1.18%
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Comprehensive_IncomeLoss_Detai

Comprehensive Income/(Loss) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	($1,622,000)	($7,915,000)
Other comprehensive income (loss)	3,369,000	1,979,000
Balance at the end of the period	1,747,000	-5,936,000
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Investment Securities Available-for-Sale
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	-1,733,000	-8,332,000
Other comprehensive income (loss)	3,369,000	2,031,000
Balance at the end of the period	1,636,000	-6,301,000
Postretirement Benefits
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance at the beginning of the period	111,000	417,000
Other comprehensive income (loss)	0	-52,000
Balance at the end of the period	$111,000	$365,000

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Asset Derivatives
Total derivatives (interest-rate products) not designated as hedging instruments	$3,642,000		$2,676,000
Liability Derivatives
Total derivatives (interest-rate products) not designated as hedging instruments	3,771,000		2,714,000
(Loss) Gain Recognized in Income on Derivatives
Estimated net credit risk exposure	129,800		39,300
Posted collateral	7,800,000		5,400,000
Derivatives not designated as hedging instruments | Interest-rate swaps
Derivatives and Hedging Activities
Number of interest-rate swaps	22		22
Notional amount of interest-rate swaps	110,200,000		109,400,000
Derivatives not designated as hedging instruments | Interest-rate products
Asset Derivatives
Total derivatives (interest-rate products) not designated as hedging instruments	3,642,000		2,676,000
Liability Derivatives
Total derivatives (interest-rate products) not designated as hedging instruments	3,771,000		2,714,000
(Loss) Gain Recognized in Income on Derivatives
(Loss) gain recognized in income on derivatives	($91,000)	$2,000

Derivatives_and_Hedging_Activi3

Derivatives and Hedging Activities (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Asset Derivatives
Gross Amounts of Recognized Assets	$3,642	$2,676
Net Amounts Of Assets Presented in the Statement of Financial Position	3,642	2,676
Net Amount	3,642	2,676
Liability Derivatives
Gross Amounts of Recognized Liabilities	3,771	2,714
Net Amounts Of Liabilities Presented in the Statement of Financial Position	3,771	2,714
Gross Amounts Not Offset in the Statement of Financial Position
Cash Collateral Received	7,849	5,353
Net Amount	$11,620	$8,067

Stock_Based_Compensation_Detai

Stock Based Compensation (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	bank
	plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock based compensation plans	3
Number of financial institutions defining performance targets	20
Stock based compensation expense	$0.40	$0.40
Time-based shares | Vest equally over three years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years
Vesting percentage	33.33%
Performance-based shares | Vesting after achievement of performance targets
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years
Recognition and Retention Plan 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	1,250,000
Restricted Stock Plan 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	500,000
Equity Incentive Plan 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	1,750,000

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Numerator:
Net income	$11,703	[1]	$10,542	[1]
Denominator:
Weighted average shares outstanding	70,036,090		69,875,473
Effect of dilutive securities (in shares)	128,015		108,526
Adjusted weighted average shares outstanding	70,164,105		69,983,999
EPS, Basic (in dollars per share)	$0.17	[1]	$0.15	[1]
EPS, Fully Diluted (in dollars per share)	$0.17	[1]	$0.15	[1]
[1]	Previously reported amounts 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 8, "Investments in Qualified Affordable Projects".

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets:
Total securities available-for-sale	$565,115	$550,761
Interest-rate swaps	3,642	2,676
Liabilities:
Interest-rate swaps	3,771	2,714
Changes in generic pricing of securities period one, considered for analyzing changes in prices obtained from pricing service	15 years
Changes in generic pricing of securities period two, considered for analyzing changes in prices obtained from pricing service	30 years
Recurring basis
Assets:
Interest-rate swaps	3,642	2,676
Liabilities:
Interest-rate swaps	3,771	2,714
Recurring basis | Securities available for sale
Assets:
Total securities available-for-sale	565,115	550,761
Recurring basis | Debt securities
Assets:
Total securities available-for-sale	564,130	549,788
Recurring basis | GSEs
Assets:
Total securities available-for-sale	23,253	22,988
Recurring basis | GSE CMOs
Assets:
Total securities available-for-sale	227,843	234,169
Recurring basis | GSE MBSs
Assets:
Total securities available-for-sale	271,034	250,981
Recurring basis | SBA commercial loan asset-backed securities
Assets:
Total securities available-for-sale	197	203
Recurring basis | Corporate debt obligations
Assets:
Total securities available-for-sale	40,541	40,207
Recurring basis | Trust preferred securities
Assets:
Total securities available-for-sale	1,262	1,240
Recurring basis | Marketable equity securities
Assets:
Total securities available-for-sale	985	973
Recurring basis | Level 1
Assets:
Interest-rate swaps	0	0
Liabilities:
Interest-rate swaps	0	0
Recurring basis | Level 1 | Securities available for sale
Assets:
Total securities available-for-sale	985	973
Recurring basis | Level 1 | Debt securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | GSEs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | GSE CMOs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | GSE MBSs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | SBA commercial loan asset-backed securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Corporate debt obligations
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Trust preferred securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Marketable equity securities
Assets:
Total securities available-for-sale	985	973
Recurring basis | Level 2
Assets:
Interest-rate swaps	3,642	2,676
Liabilities:
Interest-rate swaps	3,771	2,714
Recurring basis | Level 2 | Securities available for sale
Assets:
Total securities available-for-sale	564,130	549,788
Recurring basis | Level 2 | Debt securities
Assets:
Total securities available-for-sale	564,130	549,788
Recurring basis | Level 2 | GSEs
Assets:
Total securities available-for-sale	23,253	22,988
Recurring basis | Level 2 | GSE CMOs
Assets:
Total securities available-for-sale	227,843	234,169
Recurring basis | Level 2 | GSE MBSs
Assets:
Total securities available-for-sale	271,034	250,981
Recurring basis | Level 2 | SBA commercial loan asset-backed securities
Assets:
Total securities available-for-sale	197	203
Recurring basis | Level 2 | Corporate debt obligations
Assets:
Total securities available-for-sale	40,541	40,207
Recurring basis | Level 2 | Trust preferred securities
Assets:
Total securities available-for-sale	1,262	1,240
Recurring basis | Level 2 | Marketable equity securities
Assets:
Total 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 | Securities available for sale
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Debt securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | GSEs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | GSE CMOs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | GSE MBSs
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | SBA commercial loan asset-backed securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Corporate debt obligations
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Trust preferred securities
Assets:
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Marketable equity securities
Assets:
Total securities available-for-sale	$0	$0

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (Securities available for sale, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Securities available for sale
Reconciliation of assets measured at fair value on a recurring basis
Investment securities available-for-sale, beginning of period	$0	$1,775
Total unrealized losses included in other comprehensive income	0	-85
Investment securities available-for-sale, end of period	$0	$1,690

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Details 3) (Nonrecurring basis, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair value of assets and liabilities
Fair value of assets	$18,553	$7,832
Level 1
Fair value of assets and liabilities
Fair value of assets	0	0
Level 2
Fair value of assets and liabilities
Fair value of assets	980	503
Level 3
Fair value of assets and liabilities
Fair value of assets	17,573	7,329
Collateral-dependent impaired loans and leases
Fair value of assets and liabilities
Fair value of assets	16,530	6,376
Collateral-dependent impaired loans and leases | Level 1
Fair value of assets and liabilities
Fair value of assets	0	0
Collateral-dependent impaired loans and leases | Level 2
Fair value of assets and liabilities
Fair value of assets	0	0
Collateral-dependent impaired loans and leases | Level 3
Fair value of assets and liabilities
Fair value of assets	16,530	6,376
OREO
Fair value of assets and liabilities
Fair value of assets	1,043	953
OREO | Level 1
Fair value of assets and liabilities
Fair value of assets	0	0
OREO | Level 2
Fair value of assets and liabilities
Fair value of assets	0	0
OREO | Level 3
Fair value of assets and liabilities
Fair value of assets	1,043	953
Repossessed assets
Fair value of assets and liabilities
Fair value of assets	980	503
Repossessed assets | Level 1
Fair value of assets and liabilities
Fair value of assets	0	0
Repossessed assets | Level 2
Fair value of assets and liabilities
Fair value of assets	980	503
Repossessed assets | Level 3
Fair value of assets and liabilities
Fair value of assets	$0	$0

Fair_Value_of_Financial_Instru5

Fair Value of Financial Instruments (Details 4) (Level 3, Appraisal of collateral, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Collateral-dependent impaired loans and leases
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$16,530	$6,376
OREO
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$1,043	$953

Fair_Value_of_Financial_Instru6

Fair Value of Financial Instruments (Details 5) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Financial assets:
Investment securities held-to-maturity	$500	$500
Loans and leases, net	4,579,488	4,768,948
Financial liabilities:
Borrowed funds	35,628	39,615
Level 1
Financial assets:
Investment securities held-to-maturity	0	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	0
Loans held-for-sale	787	1,537
Loans and leases, net	0	0
Financial liabilities:
Certificates of deposit	1,061,059	949,320
Borrowed funds	931,448	1,132,940
Level 3
Financial assets:
Investment securities held-to-maturity	500	500
Loans held-for-sale	0	0
Loans and leases, net	4,592,417	4,753,605
Financial liabilities:
Certificates of deposit	0	0
Borrowed funds	0	0
Carrying Value
Financial assets:
Investment securities held-to-maturity	500	500
Loans held-for-sale	787	1,537
Loans and leases, net	4,579,488	4,768,948
Financial liabilities:
Certificates of deposit	1,051,580	946,708
Borrowed funds	924,925	1,126,404
Estimated Fair Value
Financial assets:
Investment securities held-to-maturity	500	500
Loans held-for-sale	787	1,537
Loans and leases, net	4,592,417	4,753,605
Financial liabilities:
Certificates of deposit	1,061,059	949,320
Borrowed funds	$931,448	$1,132,940

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Loan commitments
Unadvanced portion of loans and leases	$534,040,000		$629,351,000
Unused lines of credit:
Home equity	249,810,000		244,603,000
Other consumer	11,743,000		10,876,000
Other commercial	859,000		728,000
Unused letters of credit:
Financial standby letters of credit	16,249,000		16,762,000
Performance standby letters of credit	10,000		3,126,000
Commercial and similar letters of credit	50,000		50,000
Back-to-back interest-rate swaps	110,152,000		109,362,000
Unfunded credit commitments liability included in other liabilities	1,200,000	1,100,000	1,300,000
Fair value of interest rate swap assets	3,600,000		2,700,000
Fair value of interest rate swap liabilities	3,800,000		2,700,000
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
Remainder of 2015	4,130,000
Year ending:
2016	5,354,000
2017	4,831,000
2018	4,275,000
2019	3,361,000
Thereafter	12,266,000
Total	34,217,000
Total rental expense	1,200,000	2,300,000
Operating leases, rent expense, acceleration	0	800,000
Minimum
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
Lease term	5 years
Maximum
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
Lease term	20 years
Commercial real estate mortgage loans
Loan commitments
Commitments to originate loans and leases	56,739,000		107,179,000
Commercial
Loan commitments
Commitments to originate loans and leases	74,264,000		102,353,000
Residential mortgage
Loan commitments
Commitments to originate loans and leases	$9,878,000		$20,520,000