Brookline Bancorp (BRKL) 10-Q 7 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Nov. 07, 2014
Document and Entity Information	'	'
Entity Registrant Name	'BROOKLINE BANCORP INC	'
Entity Central Index Key	'0001049782	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Current Reporting Status	'Yes	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	70,022,691

Unaudited_Consolidated_Balance

Unaudited Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$37,237	$37,148
Short-term investments	50,901	55,357
Total cash and cash equivalents	88,138	92,505
Investment securities available-for-sale	527,516	492,428
Investment securities held-to-maturity (fair value of $500)	500	500
Total investment securities	528,016	492,928
Loans and leases held-for-sale	464	13,372
Total loans and leases	4,736,028	4,362,465
Allowance for loan and lease losses	-52,822	-48,473
Net loans and leases	4,683,206	4,313,992
Restricted equity securities	74,804	66,559
Premises and equipment, net of accumulated depreciation of $42,858 and $44,420, respectively	81,479	80,505
Deferred tax asset	29,168	31,710
Goodwill	137,890	137,890
Identified intangible assets, net of accumulated amortization of $25,411 and $22,895, respectively	14,371	16,887
Other real estate owned and repossessed assets	2,463	1,578
Other assets	77,966	77,180
Total assets	5,717,965	5,325,106
Non-interest-bearing deposits:	'	'
Demand checking accounts	705,604	707,023
Interest-bearing deposits:	'	'
NOW accounts	220,766	210,602
Savings accounts	532,790	494,734
Money market accounts	1,522,612	1,487,979
Certificate of deposit accounts	907,432	934,668
Total interest-bearing deposits	3,183,600	3,127,983
Total deposits	3,889,204	3,835,006
Borrowed funds:	'	'
Advances from the FHLBB	1,027,211	768,773
Subordinated debentures and notes	82,763	9,163
Other borrowed funds	22,891	34,619
Total borrowed funds	1,132,865	812,555
Mortgagors’ escrow accounts	8,757	7,889
Accrued expenses and other liabilities	50,430	51,485
Total liabilities	5,081,256	4,706,935
Commitments and contingencies	'	'
Brookline Bancorp, Inc. stockholders’ equity:	'	'
Common stock, $0.01 par value; 200,000,000 shares authorized; 75,744,445 shares issued	757	757
Additional paid-in capital	616,997	617,538
Retained earnings, partially restricted	78,980	64,903
Accumulated other comprehensive loss	-4,681	-7,915
Treasury stock, at cost; 5,035,956 shares and 5,171,985 shares, respectively	-58,228	-59,826
Unallocated common stock held by ESOP; 261,453 shares and 291,666 shares, respectively	-1,425	-1,590
Total Brookline Bancorp, Inc. stockholders’ equity	632,400	613,867
Noncontrolling interest in subsidiary	4,309	4,304
Total stockholders' equity	636,709	618,171
Total liabilities and stockholders' equity	5,717,965	5,325,106
Commercial real estate loans	'	'
ASSETS	'	'
Total loans and leases	2,402,723	2,203,623
Allowance for loan and lease losses	-29,420	-23,022
Commercial loans	'	'
ASSETS	'	'
Total loans and leases	1,121,853	965,610
Allowance for loan and lease losses	-13,949	-15,220
Indirect automobile	'	'
ASSETS	'	'
Total loans and leases	353,263	400,531
Allowance for loan and lease losses	-3,461	-3,924
Consumer loans	'	'
ASSETS	'	'
Total loans and leases	858,189	792,701
Allowance for loan and lease losses	($3,569)	($3,375)

Unaudited_Consolidated_Balance1

Unaudited Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
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 (in dollars)	42,858	44,420
Identified intangible assets, accumulated amortization (in dollars)	$25,411	$22,895
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	5,035,956	5,171,985
Unallocated common stock held by ESOP, shares	261,453	291,666

Unaudited_Consolidated_Stateme

Unaudited Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest and dividend income:	'	'	'	'
Loans and leases	$51,769	$48,462	$154,144	$148,525
Debt securities	2,312	2,041	6,931	5,827
Marketable and restricted equity securities	520	298	1,508	911
Short-term investments	15	22	73	72
Total interest and dividend income	54,616	50,823	162,656	155,335
Interest expense:	'	'	'	'
Deposits	4,248	4,637	12,740	14,214
Borrowed funds	3,044	2,774	8,424	8,677
Total interest expense	7,292	7,411	21,164	22,891
Net interest income	47,324	43,412	141,492	132,444
Provision for credit losses	2,034	2,748	6,753	7,042
Net interest income after provision for credit losses	45,290	40,664	134,739	125,402
Non-interest income:	'	'	'	'
Deposit fees	2,352	1,989	6,515	5,984
Loan fees	601	296	1,229	1,127
Loss from investments in affordable housing projects	-543	-558	-1,586	-1,494
Loss on sales of securities, net	0	0	-13	0
Gain on sales of loans and leases held-for-sale	538	116	1,194	597
(Loss)/gain on sale/disposals of premises and equipment, net	-2	21	1,502	0
Other	2,710	1,592	5,229	3,708
Total non-interest income	5,656	3,456	14,070	9,922
Non-interest expense:	'	'	'	'
Compensation and employee benefits	18,258	15,589	53,585	48,586
Occupancy	3,334	3,312	10,893	9,260
Equipment and data processing	4,193	4,061	12,918	12,423
Professional services	1,001	1,329	4,215	4,343
FDIC insurance	873	508	2,580	2,378
Advertising and marketing	745	758	2,186	2,196
Amortization of identified intangible assets	828	1,154	2,516	3,496
Other	2,692	2,845	7,829	8,462
Total non-interest expense	31,924	29,556	96,722	91,144
Income before provision for income taxes	19,022	14,564	52,087	44,180
Provision for income taxes	6,779	4,645	18,548	15,156
Net income before noncontrolling interest in subsidiary	12,243	9,919	33,539	29,024
Less net income attributable to noncontrolling interest in subsidiary	662	490	1,560	1,292
Net income attributable to Brookline Bancorp, Inc.	$11,581	$9,429	$31,979	$27,732
Earnings per common share:	'	'	'	'
Basic (in dollars per share)	$0.17	$0.14	$0.46	$0.40
Diluted (in dollars per share)	$0.17	$0.13	$0.46	$0.40
Weighted average common shares outstanding during the period:	'	'	'	'
Basic (in shares)	69,989,909	69,830,953	69,918,248	69,789,737
Diluted (in shares)	70,088,987	69,913,765	70,029,383	69,860,722
Dividends declared per common share	$0.09	$0.09	$0.26	$0.26

Unaudited_Consolidated_Stateme1

Unaudited Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income before noncontrolling interest in subsidiary	$12,243	$9,919	$33,539	$29,024
Investment securities available-for-sale:	'	'	'	'
Unrealized securities holding (losses) gains	-2,257	-735	5,386	-13,526
Income tax benefit (expense)	850	276	-2,043	5,137
Net unrealized securities holding (losses) gains before reclassification adjustments	-1,407	-459	3,343	-8,389
Less reclassification adjustments for securities losses included in net income:	'	'	'	'
Loss on sales of securities, net	0	0	-13	0
Income tax benefit	0	0	5	0
Net reclassification adjustments for securities losses included in net income	0	0	-8	0
Net securities holding (losses) gains	-1,407	-459	3,351	-8,389
Postretirement benefits:	'	'	'	'
Adjustment of accumulated obligation for postretirement benefits	-105	0	-190	8
Income tax benefit (expense)	40	0	73	-2
Net adjustment of accumulated obligation for postretirement benefits	-65	0	-117	6
Other comprehensive (loss) income, net of taxes	-1,472	-459	3,234	-8,383
Comprehensive income	10,771	9,460	36,773	20,641
Net income attributable to noncontrolling interest in subsidiary	662	490	1,560	1,292
Comprehensive income attributable to Brookline Bancorp, Inc.	$10,109	$8,970	$35,213	$19,349

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, 2012	$615,809	$612,097	$757	$618,426	$53,358	$3,483	($62,107)	($1,820)	$3,712
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'
Net income attributable to Brookline Bancorp, Inc.	27,732	27,732	'	'	27,732	'	'	'	'
Net income attributable to noncontrolling interest in subsidiary	1,292	'	'	'	'	'	'	'	1,292
Other comprehensive income (loss)	-8,383	-8,383	'	'	'	-8,383	'	'	'
Common stock dividends of $0.255 per share for the period ended September 30, 2014 and 2013	-17,880	-17,880	'	'	-17,880	'	'	'	'
Dividend to owners of noncontrolling interest in subsidiary	-1,194	'	'	'	'	'	'	'	-1,194
Compensation under recognition and retention plan	1,073	1,073	'	1,073	'	'	'	'	0
Restricted stock awards issued, net of awards surrendered	0	'	'	-2,531	'	'	2,531	'	'
Common stock held by ESOP committed to be released (30,213 and 31,689 shares for the nine month period ended September 30, 2014 and 2013, respectively)	172	172	'	0	'	'	'	172	'
Balance at Sep. 30, 2013	618,621	614,811	757	616,968	63,210	-4,900	-59,576	-1,648	3,810
Balance at Dec. 31, 2013	618,171	613,867	757	617,538	64,903	-7,915	-59,826	-1,590	4,304
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'
Net income attributable to Brookline Bancorp, Inc.	31,979	31,979	'	'	31,979	'	'	'	'
Net income attributable to noncontrolling interest in subsidiary	1,560	'	'	'	'	'	'	'	1,560
Issuance of noncontrolling units	60	'	'	'	'	'	'	'	60
Other comprehensive income (loss)	3,234	3,234	'	'	'	3,234	'	'	'
Common stock dividends of $0.255 per share for the period ended September 30, 2014 and 2013	-17,902	-17,902	'	'	-17,902	'	'	'	'
Dividend to owners of noncontrolling interest in subsidiary	-1,615	'	'	'	'	'	'	'	-1,615
Compensation under recognition and retention plan	843	843	'	-755	'	'	1,598	'	'
Common stock held by ESOP committed to be released (30,213 and 31,689 shares for the nine month period ended September 30, 2014 and 2013, respectively)	379	379	'	214	'	'	0	165	'
Balance at Sep. 30, 2014	$636,709	$632,400	$757	$616,997	$78,980	($4,681)	($58,228)	($1,425)	$4,309

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Common stock dividends, per share (in dollars per share)	$0.26	$0.26
Common stock held by ESOP committed to be released, shares	30,213	31,689

Unaudited_Consolidated_Stateme3

Unaudited Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net income attributable to Brookline Bancorp, Inc.	$31,979	$27,732
Adjustments to reconcile net income to net cash provided from operating activities:	'	'
Net income attributable to noncontrolling interest in subsidiary	1,560	1,292
Provision for credit losses	6,753	7,042
Origination of loans and leases to be sold	-18,065	-25,118
Proceeds from loans and leases sold	32,167	28,748
Proceeds from sales of other real estate owned and repossessed assets	8,966	7,948
Deferred income tax expense (benefit)	567	-1,985
Depreciation of premises and equipment	5,207	4,586
Amortization of investment securities premiums and discounts, net	2,186	2,564
Amortization of deferred loan and lease origination costs, net	7,525	7,749
Amortization of identified intangible assets	2,516	3,496
Amortization of debt issuance costs	4	0
Accretion of acquisition fair value adjustments, net	-9,110	-5,518
Gain on sales of loans and leases held-for-sale	-1,194	-597
Loss on sales of investment securities, net	13	0
(Loss)/Gain on sales of other real estate owned and repossessed assets	-26	35
Write-down of other real estate owned and repossessed assets	235	188
Gain on sale/disposals of premises and equipment, net	-1,502	0
Compensation under recognition and retention plans	843	1,073
Loss from investments in affordable housing projects	1,586	1,494
ESOP shares committed to be released	379	172
Net change in:	'	'
Cash surrender value of bank-owned life insurance	-805	-824
Other assets	-1,567	13,663
Accrued expenses and other liabilities	-1,470	-11,858
Net cash provided from operating activities	68,747	61,882
Cash flows from investing activities:	'	'
Proceeds from sales of investment securities available-for-sale	5,083	0
Proceeds from maturities, calls and principal repayments of investment securities available-for-sale	59,961	108,940
Purchases of investment securities available-for-sale	-96,932	-124,106
Proceeds from maturities, calls, and principal repayments of investment securities held-to-maturity	500	0
Purchases of investment securities held-to-maturity	-500	0
Proceeds from redemption of restricted equity securities	0	2,108
Purchases of restricted equity securities	-8,245	-74
Net increase in loans and leases	-386,340	-137,775
Proceeds from sales of premises and equipment	1,972	330
Purchase of premises and equipment, net	-6,785	-13,763
Net cash used for investing activities	-431,286	-164,340
Cash flows from financing activities:	'	'
Increase in demand checking, NOW, savings and money market accounts	81,434	182,301
Decrease in certificates of deposit	-27,054	-60,929
Proceeds from FHLBB advances	2,097,776	2,165,600
Repayment of FHLBB advances	-1,837,206	-2,169,090
Proceeds from issuance of subordinated notes	73,539	0
Repayment of subordinated debentures	0	-3,000
Decrease in other borrowed funds, net	-11,728	-16,094
Increase in mortgagors’ escrow accounts, net	868	1,062
Payment of dividends on common stock	-17,902	-17,880
Proceeds from issuance of noncontrolling units	60	0
Payment of dividends to owners of noncontrolling interest in subsidiary	-1,615	-1,194
Net cash provided from financing activities	358,172	80,776
Net decrease in cash and cash equivalents	-4,367	-21,682
Cash and cash equivalents at beginning of period	92,505	117,097
Cash and cash equivalents at end of period	88,138	95,415
Cash paid during the period for:	'	'
Interest on deposits, borrowed funds and subordinated debt	23,278	26,345
Income taxes	13,689	14,990
Non-cash investing activities:	'	'
Transfer from loans to other real estate owned	$10,060	$7,999

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
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 bank; and First Ipswich Bank (“First Ipswich” and formerly known as the First National Bank of Ipswich), a Massachusetts-chartered trust company (collectively referred to as the “Banks”). The Banks are all members of the Federal Reserve System. The Company is also the parent of Brookline Securities Corp. (“BSC”). The Company’s primary business is to provide commercial, business and retail banking services to its corporate, municipal and individual customers through its banks and non-bank subsidiaries.
	Brookline Bank, which includes its wholly-owned subsidiaries BBS Investment Corp. and 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 and BRI Realty 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, origination of indirect automobile loans, 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, and Macrolease, which is based in Plainview, New York.
	The Company and the Banks are supervised, examined and regulated by the Board of Governors of the Federal Reserve System ("FRB"). As Massachusetts-chartered member 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. BankRI is subject to regulation under the laws of the State of Rhode Island and the jurisdiction of the Banking Division of the Rhode Island Department of Business Regulation.
	The Federal Deposit Insurance Corporation (“FDIC”) offers insurance coverage on all deposits up to $250,000 per depositor at each of the 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, 2013.
	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. These reclassifications did not change stockholders' equity and net income reported.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-15, Disclosures of Uncertainties About an Entity’s Ability to Continue as a Going Concern. This ASU provides guidance on determining when and how reporting entities must disclose going concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The ASU is effective for interim and annual periods beginning after December 15, 2016; early application is permitted. The Company has chosen not to early adopt ASU 2014-15. Management do not expect material impact, if any, as of September 30, 2014.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. This ASU eliminates sale accounting for repurchase-to-maturity transactions and supersedes the guidance under which a transfer of a financial asset and a contemporaneous repurchase financing could be accounted for on a combined basis as a forward agreement. In addition, the ASU requires a new disclosure for transactions economically similar to repurchase agreements in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets throughout the term of the transaction. The ASU is effective for annual periods beginning after December 15, 2014 and interim periods beginning after December 15, 2015; early application is not permitted. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In May 2014, the FASB issued ASU 2014-09, Revenue From Contracts with Customers. This ASU provides a single principles-based, five-step model to be applied to all contracts with customers. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The ASU is effective for annual periods (including interim reporting periods within those periods) beginning after December 15, 2016; early application is not permitted. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In January 2014, the FASB issued ASU 2014-04, Receivables-Troubled Debt Restructurings by Creditors. This ASU provides clarification on when an in substance repossession or foreclosure occurs resulting in the creditor derecognizing the loan and recognizing the collateral. Currently, there is no definition of in substance repossession or foreclosure and physical possession in the accounting literature. This ASU is applied retrospectively or effective prospectively for all annual periods presented beginning after December 15, 2014; early adoption is permitted. The Company has chosen not to early adopt ASU 2014-04 and is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In January 2014, the FASB issued ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. This ASU provides guidance on accounting for investments by a reporting entity in flow-through limited liability entities. Currently, investments in qualified affordable housing projects are accounted for either by the effective yield, equity or cost method. This ASU allows for reporting entities to make a policy election on how to account for their investments. This ASU is applied retrospectively or effective prospectively for all annual periods presented beginning after December 15, 2014; early adoption is permitted. The Company has chosen not to early adopt ASU 2014-01 and is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Amortized				Gross		Gross			Estimated
		Cost				Unrealized		Unrealized			Fair Value
						Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	15,839			$	3	$	52		$	15,790
	GSE CMOs	245,380				108		8,260			237,228
	GSE MBSs	231,636				1,971		2,095			231,512
	SBA commercial loan asset-backed securities	212				—		2			210
	Corporate debt obligations	39,782				371		54			40,099
	Trust preferred securities	1,463				—		158			1,305
	Total debt securities	534,312				2,453		10,621			526,144
	Marketable equity securities	1,266				108		2			1,372
	Total investment securities available-for-sale	$	535,578			$	2,561	$	10,623		$	527,516
	Investment securities held-to-maturity	$	500			$	—	$	—		$	500
		At December 31, 2013
		Amortized				Gross		Gross			Estimated
		Cost				Unrealized		Unrealized			Fair Value
						Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	12,138			$	42	$	—		$	12,180
	GSE CMOs	254,331				86		10,773			243,644
	GSE MBSs	202,478				1,852		4,929			199,401
	Private-label CMOs	3,258				115		18			3,355
	SBA commercial loan asset-backed securities	245				—		2			243
	Auction-rate municipal obligations	1,900				—		125			1,775
	Municipal obligations	1,068				18		—			1,086
	Corporate debt obligations	27,751				506		33			28,224
	Trust preferred securities	1,461				—		251			1,210
	Total debt securities	504,630				2,619		16,131			491,118
	Marketable equity securities	1,259				61		10			1,310
	Total investment securities available-for-sale	$	505,889			$	2,680	$	16,141		$	492,428
	Investment securities held-to-maturity	$	500			$	—	$	—		$	500
	At September 30, 2014, the fair value of all investment securities available-for-sale was $527.5 million, with net unrealized losses of $8.1 million, compared to a fair value of $492.4 million and net unrealized losses of $13.5 million at December 31, 2013. At September 30, 2014, $406.3 million, or 77.0%, of the portfolio, had gross unrealized losses, compared to $383.3 million, or 77.8%, at December 31, 2013. The total gross unrealized loss at September 30, 2014 was $10.6 million, as compared to $16.1 million at December 31, 2013.
	Investment Securities as Collateral
	At September 30, 2014 and December 31, 2013, respectively, $446.7 million and $402.5 million of investment securities available-for-sale were pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; and Federal Home Loan Bank of Boston (“FHLBB”) borrowings.
	Other-Than-Temporary Impairment (“OTTI”)
	Investment securities at September 30, 2014 and December 31, 2013 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:
		At September 30, 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)
	Debt securities:
	GSEs	$	10,767			$	52	$	—		$	—		$	10,767		$	52
	GSE CMOs	43,509				1,361		188,640			6,899			232,149			8,260
	GSE MBSs	59,932				208		86,466			1,887			146,398			2,095
	SBA commercial loan asset-backed securities	8				—		192			2			200			2
	Corporate debt obligations	14,962				54		—			—			14,962			54
	Trust preferred securities	—				—		1,305			158			1,305			158
	Temporarily impaired debt securities	129,178				1,675		276,603			8,946			405,781			10,621
	Marketable equity securities	510				2		—			—			510			2
	Total temporarily impaired investment securities	$	129,688			$	1,677	$	276,603		$	8,946		$	406,291		$	10,623
		At December 31, 2013
		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)
	Debt securities:
GSE CMOs	$	221,317			$	9,861	$	16,257		$	912		$	237,574		$	10,773
GSE MBSs	121,836				3,746		13,516			1,183			135,352			4,929
Private-label CMOs	639				18		—			—			639			18
SBA commercial loan asset-backed securities	32				—		192			2			224			2
Auction-rate municipal obligations	—				—		1,775			125			1,775			125
Corporate debt obligations	5,988				33		—			—			5,988			33
Trust preferred securities	—				—		1,210			251			1,210			251
Temporarily impaired debt securities	349,812				13,658		32,950			2,473			382,762			16,131
Marketable equity securities	501				10		—			—			501			10
Total temporarily impaired investment securities	$	350,313			$	13,668	$	32,950		$	2,473		$	383,263		$	16,141
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 September 30, 2014, 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 September 30, 2014. 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 September 30, 2014, only GNMA MBSs and CMOs, and Small Business Administration (“SBA”) commercial loan asset-backed securities with an estimated fair value of $24.2 million were backed explicitly by the full faith and credit of the U.S. Government, compared to $18.9 million at December 31, 2013.
At September 30, 2014, the Company held GSE debentures with a total fair value of $15.8 million which approximated amortized cost. At December 31, 2013, the Company held GSE debentures with a total fair value of $12.2 million which also approximated amortized cost. At September 30, 2014, four of the eight securities in this portfolio were in unrealized loss positions. At December 31, 2013, none of the five securities in this portfolio was 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. During the nine months ended September 30, 2014, the Company purchased $8.9 million in GSE debentures. The Company did not purchase any GSE debentures in the same period in 2013.
At September 30, 2014, the Company held GSE mortgage-related securities with a total fair value of $468.7 million and a net unrealized loss of $8.3 million. This compares to a total fair value of $443.0 million and a net unrealized loss of $13.8 million at December 31, 2013. At September 30, 2014, 106 of the 244 securities in this portfolio were in unrealized loss positions, compared to 86 of the 232 securities at December 31, 2013. All securities are performing and backed by the implicit (FHLB / FNMA / FHLMC) or explicit (GNMA) guarantee of the U.S. Government. During the nine months ended September 30, 2014, the Company purchased $76.1 million in GSE CMOs and GSE MBSs to reinvest cash from matured securities. This compares to a total of $111.4 million during the same period in 2013.
SBA Commercial Loan Asset-Backed
At September 30, 2014, the Company held eight SBA securities with a total fair value of $0.2 million which approximated amortized cost. At September 30, 2014, seven of the eight securities in this portfolio were in unrealized loss positions. At December 31, 2013, the Company held nine SBA securities with a total fair value of $0.2 million which also approximated amortized cost. At December 31, 2013, seven of the nine 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.
Private-Label CMOs
At September 30, 2014, the Company held no private-issuer CMO-related securities. All private-label CMOs were sold during the second quarter of 2014. At December 31, 2013, the Company held private-issuer CMO-related securities with a total fair value of $3.4 million and a net unrealized gain of $0.1 million. At December 31, 2013, two of the eleven securities in this portfolio were in unrealized loss positions.
Auction-Rate Municipal Obligations and Municipal Obligations
The auction-rate obligations owned by the Company were rated “AAA” at the time of acquisition due, in part, to the guarantee of third-party insurers who would have to pay the obligations if the issuers failed to pay the obligations when they become due. During the financial crisis, certain third-party insurers experienced financial difficulties and were not able to meet their contractual obligations. As a result, auctions failed to attract a sufficient number of investors and created a liquidity problem for those investors who were relying on the obligations to be redeemed at auction. Since then, there has not been an active market for auction-rate municipal obligations.
At September 30, 2014, the Company held no auction-rate municipal obligations. All auction-rate municipal obligations were sold during the second quarter of 2014. This compares to an estimated fair value of $1.8 million, with a corresponding net unrealized loss of $0.1 million at December 31, 2013. At December 31, 2013, all of the securities in this portfolio were in unrealized loss positions.
The Company owns no municipal obligations at September 30, 2014. All municipal obligations were sold during the second quarter of 2014. This compares to a total fair value of $1.1 million which approximated amortized cost at December 31, 2013. At December 31, 2013, none of the securities in this portfolio was in unrealized loss position.
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 $40.1 million and total net unrealized gains of $0.3 million at September 30, 2014. This compares to eleven corporate obligation securities with a total fair value of $28.2 million and total net unrealized gains of $0.5 million at December 31, 2013. At September 30, 2014, four of the thirteen securities in this portfolio were in unrealized loss positions. At December 31, 2013, two of the eleven securities in this portfolio are 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. During the nine months ended September 30, 2014, the Company purchased $12.0 million in corporate obligations compared to $12.7 million in the same period in 2013.
Trust Preferred Securities
Trust preferred securities represent subordinated debt issued by financial institutions. At September 30, 2014, 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 $0.3 million at December 31, 2013. At September 30, 2014 and December 31, 2013, 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 September 30, 2014, the Company owned marketable equity securities with a fair value of $1.4 million, including net unrealized gains of $0.1 million. This compares to a fair value of $1.3 million and net unrealized gains of $0.1 million at December 31, 2013. At both September 30, 2014 and December 31, 2013, one out of the four securities in this portfolio was in an unrealized loss position.
Investment Securities Held-to-Maturity
At September 30, 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 maturities of the debt securities are as follows at the dates indicated:
	At September 30, 2014								At December 31, 2013
	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	$	8,168			$	8,210	1.59	%	$	13,012		$	13,062		0.82	%
After 1 year through 5 years	49,866				50,779		2.61	%	40,204			41,187			2.9	%
After 5 years through 10 years	96,209				96,645		1.99	%	66,447			67,075			2.23	%
Over 10 years	380,069				370,510		1.93	%	384,967			369,794			1.9	%
	$	534,312			$	526,144	2	%	$	504,630		$	491,118		2	%
Investment securities held-to-maturity:
Within 1 year	$	—			$	—	—	%	$	500		$	500		1.99	%
After 1 year through 5 years	500				500		1.3	%	—			—			—	%
	$	500			$	500	1.3	%	$	500		$	500		1.99	%
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 September 30, 2014, issuers of debt securities with an estimated fair value of $3.9 million had the right to call or prepay the obligations. Of the $3.9 million, $2.0 million matures in 1 - 5 years and $1.9 million matures in 6 - 10 years. At December 31, 2013, issuers of debt securities with an estimated fair value of $3.7 million had the right to call or prepay the obligations. Of the $3.7 million, $0.7 million matures in less than one year and $3.0 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
When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. The following table shows the gross realized gains and losses on available for sale securities for the periods indicated:
		Nine Months Ended September 30, 2014
	(In Thousands)
Sales of debt securities		$	5,083
Gross gains from sales		302
Gross losses from sales		315
Loss on sales of securities, net		$	(13	)
There were no security sales during the three-months period ended September 30, 2014. There were no security sales during the three-month and nine-month periods ended September 30, 2013.

Loans_and_Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2014
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 September 30, 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	$	1,313,218		4.23	%		$	297,374			4.35	%		$	1,610,592	4.25	%
	Multi-family mortgage	564,536			4.13	%		66,316				4.51	%		630,852		4.17	%
	Construction	151,199			3.82	%		10,080				4.45	%		161,279		3.85	%
	Total commercial real estate loans	2,028,953			4.17	%		373,770				4.38	%		2,402,723		4.2	%
	Commercial loans and leases:
	Commercial	390,912			3.71	%		104,800				4.29	%		495,712		3.83	%
	Equipment financing	560,435			6.95	%		16,106				6.29	%		576,541		6.93	%
	Condominium association	49,600			4.64	%		—				—	%		49,600		4.64	%
	Total commercial loans and leases	1,000,947			5.57	%		120,906				4.56	%		1,121,853		5.46	%
	Indirect automobile loans	353,263			4.54	%		—				—	%		353,263		4.54	%
	Consumer loans:
	Residential mortgage	466,309			3.61	%		103,819				3.83	%		570,128		3.65	%
	Home equity	164,536			3.37	%		110,226				3.85	%		274,762		3.56	%
	Other consumer	12,616			4.74	%		683				14.97	%		13,299		5.27	%
	Total consumer loans	643,461			3.57	%		214,728				3.88	%		858,189		3.65	%
	Total loans and leases	$	4,026,624		4.45	%		$	709,404			4.26	%		$	4,736,028	4.42	%
		At December 31, 2013
		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	$	1,111,750		4.34	%		$	350,235			4.42	%		$	1,461,985	4.36	%
	Multi-family mortgage	554,555			4.19	%		73,378				4.63	%		627,933		4.24	%
	Construction	102,927			3.81	%		10,778				4.37	%		113,705		3.87	%
	Total commercial real estate loans	1,769,232			4.26	%		434,391				4.46	%		2,203,623		4.3	%
	Commercial loans and leases:
	Commercial	297,684			3.68	%		110,108				4.54	%		407,792		3.91	%
	Equipment financing	485,330			7.14	%		27,694				6.6	%		513,024		7.11	%
	Condominium association	44,794			4.74	%		—				—	%		44,794		4.74	%
	Total commercial loans and leases	827,808			5.77	%		137,802				4.95	%		965,610		5.65	%
	Indirect automobile loans	400,531			4.98	%		—				—	%		400,531		4.98	%
	Consumer loans:
	Residential mortgage	411,554			3.65	%		116,631				3.93	%		528,185		3.71	%
	Home equity	132,396			3.39	%		125,065				3.88	%		257,461		3.63	%
	Other consumer	5,532			5.98	%		1,523				14.89	%		7,055		7.9	%
	Total consumer loans	549,482			3.61	%		243,219				3.98	%		792,701		3.72	%
	Total loans and leases	$	3,547,053		4.59	%		$	815,412			4.38	%		$	4,362,465	4.55	%
	The Company lends primarily in the eastern half of Massachusetts, southern New Hampshire and Rhode Island, with the exception of equipment financing, 36.6% of which is in the greater New York/New Jersey metropolitan area and 63.4% of which is in other areas in the United States of America at September 30, 2014, compared to 38.2% of which is in the greater New York/New Jersey metropolitan area and 61.8% of which is in other areas in the United States of America at December 31, 2013.
	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 September 30,							Nine Months Ended September 30,
		2014			2013				2014				2013
		(In Thousands)
	Balance at beginning of period	$	38,178		$	52,182			$	45,789			$	57,812
	Reclassification from nonaccretable difference for loans with improved cash flows	2,141			1,537				3,795				6,913
	Accretion	(3,806		)	(5,029		)		(13,071		)		(16,035		)
	Balance at end of period	$	36,513		$	48,690			$	36,513			$	48,690
	On a quarterly basis, subsequent to acquisition, management reforecasts the expected cash flows for acquired ASC 310-30 loans, taking into account prepayment speeds, probability of default and loss given defaults. Management compares cash flow projections per the reforecast to the original cash flow projections and determines whether any reduction in cash flow expectations are due to 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 nine months ended September 30, 2014 and 2013, accretable yield adjustments totaling $3.8 million and $6.9 million, respectively, 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 $2.3 million and $6.1 million at September 30, 2014 and December 31, 2013, respectively.
	Related Party Loans
	The Banks’ authority to extend credit to their respective directors and executive officers, as well as to entities controlled by such persons, is currently governed by the requirements of the Sarbanes-Oxley Act of 2002 and Regulation O of the FRB. Among other things, these provisions require that extensions of credit to insiders (1) be made on terms that are substantially the same as, and follow credit underwriting procedures that are not less stringent than, those prevailing for comparable transactions with unaffiliated persons and that do not involve more than the normal risk of repayment or present other unfavorable features; and (2) not exceed certain limitations on the amount of credit extended to such persons, individually and in the aggregate, which limits are based, in part, on the amount of the Banks’ capital. In addition, the extensions of credit to insiders must be approved by each Bank’s Board of Directors.
	The following table summarizes the change in the total amounts of loans and advances, to directors, executive officers and their affiliates for the periods indicated. All loans were performing at September 30, 2014 and December 31, 2013.
	Nine Months Ended September 30,
	2014			2013
	(In Thousands)
Balance at beginning of period	$	16,110		$	4,083
New loans granted during the period	1,726			498
Advances on lines of credit	1,803			6,163
Repayments	(9,803		)	(887		)
Loans no longer classified as related party loans	(1,016		)	10,753
Balance at end of period	$	8,820		$	20,610
Unfunded commitments on extensions of credit to insiders totaled $14.6 million and $11.7 million at September 30, 2014 and December 31, 2013, respectively.
Loans and Leases Pledged as Collateral
At September 30, 2014 and December 31, 2013, respectively, $1.7 billion and $1.2 billion of loans and leases were pledged as collateral for wholesale borrowing.

Allowance_for_Loan_and_Lease_L

Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at June 30, 2014	$	26,715			$	15,866			$	3,686			$	3,017			$	2,402			$	51,686
	Charge-offs	(64		)		(605		)		(264		)		(203		)		—				(1,136		)
	Recoveries	—				261				55				27				—				343
	Provision (credit) for loan and lease losses	2,769				(1,573		)		(16		)		728				21				1,929
	Balance at September 30, 2014	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
		Three Months Ended September 30, 2013
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at June 30, 2013	$	22,019			$	11,791			$	4,695			$	2,999			$	2,777			$	44,281
	Charge-offs	(7		)		(219		)		(510		)		(167		)		—				(903		)
	Recoveries	—				62				116				104				—				282
	Provision for loan and lease losses	447				2,036				15				179				53				2,730
	Balance at September 30, 2013	$	22,459			$	13,670			$	4,316			$	3,115			$	2,830			$	46,390
		Nine Months Ended September 30, 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	(64		)		(1,952		)		(781		)		(585		)		—				(3,382		)
	Recoveries	—				730				332				141				—				1,203
	Provision (credit) for loan and lease losses	6,462				(49		)		(14		)		638				(509		)		6,528
	Balance at September 30, 2014	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
		Nine Months Ended September 30, 2013
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2012	$	20,018			$	10,655			$	5,304			$	2,545			$	2,630			$	41,152
	Charge-offs	(88		)		(943		)		(1,190		)		(373		)		—				(2,594		)
	Recoveries	4				326				395				190				—				915
	Provision (credit) for loan and lease losses	2,525				3,632				(193		)		753				200				6,917
	Balance at September 30, 2013	$	22,459			$	13,670			$	4,316			$	3,115			$	2,830			$	46,390
	The liability for unfunded credit commitments, which is included in other liabilities, was $1.3 million, $1.0 million and $0.9 million at September 30, 2014, December 31, 2013 and September 30, 2013, respectively. During the nine-month periods ended September 30, 2014 and 2013, the liability for unfunded credit commitments increased by $0.3 million and $0.1 million, respectively, to reflect changes in the estimate of loss exposure associated with credit commitments. No credit commitments were charged off against the liability account in the nine-month periods ended September 30, 2014 and 2013.
	Provision for Credit Losses
	The provision for credit losses are set forth below for the periods indicated:
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
		(In Thousands)
	Provision (credit) for loan and lease losses:
	Commercial real estate	$	2,769			$	447			$	6,462			$	2,525
	Commercial	(1,573		)		2,036				(49		)		3,632
	Indirect automobile	(16		)		15				(14		)		(193		)
	Consumer	728				179				638				753
	Unallocated	21				53				(509		)		200
	Total provision for loan and lease losses	1,929				2,730				6,528				6,917
	Unfunded credit commitments	105				18				225				125
	Total provision for credit losses	$	2,034			$	2,748			$	6,753			$	7,042
	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 applied to principal. Loans are 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.
	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. For each class of loan, management makes significant judgments in selecting the estimation method that fits the credit characteristics of its class and portfolio segment as set forth below.
	General Allowance
	The general allowance for loan and lease losses was $49.6 million at September 30, 2014, compared to $44.1 million at December 31, 2013. The general portion of the allowance for loan and lease losses increased by $5.5 million during the nine months ended September 30, 2014, in part as a result of growth in the commercial real estate and commercial loan and lease portfolios, partially offset by the decrease in the indirect auto portfolio.
	Specific Allowance
	The specific allowance for loan and lease losses was $0.8 million at September 30, 2014, compared to $1.5 million at December 31, 2013. The specific allowance decreased by $0.7 million during the nine months ended September 30, 2014, largely as a result of improved credit quality and higher collateral value underlying those impaired loans and leases.
	Unallocated Allowance
The unallocated allowance for loan and lease losses was $2.4 million at September 30, 2014, compared to $2.9 million at December 31, 2013. The unallocated portion of the allowance for loan and lease losses decreased by $0.5 million during the nine months ended September 30, 2014, largely as the result of improved credit quality and loss history.
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 September 30, 2014 by credit quality indicator.
	At September 30, 2014
	Commercial				Multi-				Construction				Commercial				Equipment				Condominium				Other
	Real Estate				Family												Financing				Association				Consumer
	Mortgage				Mortgage
	(In Thousands)
Originated:
Loan rating:
Pass	$	1,303,529			$	564,171			$	151,199			$	380,023			$	556,230			$	49,600			$	12,606
OAEM	8,626				365				—				8,701				1,009				—				—
Substandard	1,063				—				—				1,030				2,510				—				10
Doubtful	—				—				—				1,158				686				—				—
Total originated	1,313,218				564,536				151,199				390,912				560,435				49,600				12,616
Acquired:
Loan rating:
Pass	279,812				63,327				9,843				94,492				16,015				—				672
OAEM	8,842				723				237				2,450				—				—				—
Substandard	8,674				2,266				—				7,704				91				—				11
Doubtful	46				—				—				154				—				—				—
Total acquired	297,374				66,316				10,080				104,800				16,106				—				683
Total loans	$	1,610,592			$	630,852			$	161,279			$	495,712			$	576,541			$	49,600			$	13,299
At September 30, 2014, there were no loans categorized as definite loss.
	At September 30, 2014
	Indirect Automobile
	(In Thousands)				(Percent)
Originated:
Credit score:
Over 700	$	291,648			82.6	%
661-700	48,926				13.8	%
660 and below	11,007				3.1	%
Data not available	1,682				0.5	%
Total loans	$	353,263			100	%
	At September 30, 2014
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	102,788			18	%		$	101,061			36.8	%
50% - 69%	166,126				29.1	%		33,576				12.2	%
70% - 79%	172,458				30.3	%		24,805				9	%
80% and over	23,275				4.1	%		4,129				1.5	%
Data not available	1,662				0.3	%		965				0.4	%
Total originated	466,309				81.8	%		164,536				59.9	%
Acquired:
Loan-to-value ratio:
Less than 50%	19,858				3.5	%		73,237				26.7	%
50% - 69%	36,313				6.4	%		23,751				8.6	%
70% - 79%	25,974				4.6	%		11,200				4.1	%
80% and over	17,358				3	%		1,185				0.4	%
Data not available	4,316				0.7	%		853				0.3	%
Total acquired	103,819				18.2	%		110,226				40.1	%
Total loans	$	570,128			100	%		$	274,762			100	%
The following tables present the recorded investment in loans in each class at December 31, 2013 by credit quality indicator.
	At December 31, 2013
	Commercial				Multi-				Construction				Commercial				Equipment				Condominium				Other
	Real Estate				Family												Financing				Association				Consumer
	Mortgage				Mortgage
	(In Thousands)
Originated:
Loan rating:
Pass	$	1,099,108			$	554,183			$	102,927			$	295,057			$	479,811			$	44,793			$	5,528
OAEM	11,555				372				—				49				625				—				—
Substandard	1,087				—				—				1,078				4,817				1				4
Doubtful	—				—				—				1,500				77				—				—
Total originated	1,111,750				554,555				102,927				297,684				485,330				44,794				5,532
Acquired:
Loan rating:
Pass	332,145				69,310				10,090				96,779				27,535				—				1,509
OAEM	7,556				463				688				4,617				61				—				—
Substandard	8,645				3,605				—				8,518				98				—				14
Doubtful	1,889				—				—				194				—				—				—
Total acquired	350,235				73,378				10,778				110,108				27,694				—				1,523
Total loans	$	1,461,985			$	627,933			$	113,705			$	407,792			$	513,024			$	44,794			$	7,055
At December 31, 2013, there were no loans categorized as definite loss.
	At December 31, 2013
	Indirect Automobile
	(In Thousands)				(Percent)
Originated:
Credit score:
Over 700	$	332,140			82.9	%
661-700	54,038				13.5	%
660 and below	12,793				3.2	%
Data not available	1,560				0.4	%
Total loans	$	400,531			100	%
	At December 31, 2013
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	94,500			17.9	%		$	75,372			29.3	%
50% - 69%	149,969				28.4	%		31,504				12.2	%
70% - 79%	139,960				26.5	%		21,161				8.2	%
80% and over	22,772				4.3	%		3,240				1.3	%
Data not available	4,353				0.8	%		1,119				0.4	%
Total originated	411,554				77.9	%		132,396				51.4	%
Acquired:
Loan-to-value ratio:
Less than 50%	23,101				4.4	%		84,272				32.7	%
50% - 69%	39,298				7.4	%		25,964				10.1	%
70% - 79%	31,932				6	%		13,390				5.2	%
80% and over	19,870				3.8	%		1,208				0.5	%
Data not available	2,430				0.5	%		231				0.1	%
Total acquired	116,631				22.1	%		125,065				48.6	%
Total loans	$	528,185			100	%		$	257,461			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 September 30, 2014 and December 31, 2013.
	At September 30, 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	$	285			$	1,131			$	32			$	1,448			$	1,311,770			$	1,313,218			$	—			$	1,063
Multi-family mortgage	—				—				—				—				564,536				564,536				—				—
Construction	—				—				—				—				151,199				151,199				—				—
Total commercial real estate loans	285				1,131				32				1,448				2,027,505				2,028,953				—				1,063
Commercial loans and leases:
Commercial	173				42				1,160				1,375				389,537				390,912				—				1,239
Equipment financing	2,058				1,405				1,742				5,205				555,230				560,435				—				2,737
Condominium association	150				—				—				150				49,450				49,600				—				—
Total commercial loans and leases	2,381				1,447				2,902				6,730				994,217				1,000,947				—				3,976
Indirect automobile	4,136				646				113				4,895				348,368				353,263				—				474
Consumer loans:
Residential mortgage	974				—				502				1,476				464,833				466,309				—				1,847
Home equity	217				130				36				383				164,153				164,536				—				58
Other consumer	20				5				22				47				12,569				12,616				—				22
Total consumer loans	1,211				135				560				1,906				641,555				643,461				—				1,927
Total originated loans and leases	$	8,013			$	3,359			$	3,607			$	14,979			$	4,011,645			$	4,026,624			$	—			$	7,440
	At September 30, 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	$	2,908			$	3,936			$	1,751			$	8,595			$	288,779			$	297,374			$	1,071			$	2,111
Multi-family mortgage	375				—				—				375				65,941				66,316				—				299
Construction	—				—				—				—				10,080				10,080				—				—
Total commercial real estate loans	3,283				3,936				1,751				8,970				364,800				373,770				1,071				2,410
Commercial loans and leases:
Commercial	742				387				3,099				4,228				100,572				104,800				780				4,832
Equipment financing	1				—				72				73				16,033				16,106				73				19
Total commercial loans and leases	743				387				3,171				4,301				116,605				120,906				853				4,851
Consumer loans:
Residential mortgage	—				604				2,521				3,125				100,694				103,819				1,995				789
Home equity	964				263				847				2,074				108,152				110,226				—				1,807
Other consumer	4				8				16				28				655				683				—				25
Total consumer loans	968				875				3,384				5,227				209,501				214,728				1,995				2,621
Total acquired loans and leases	$	4,994			$	5,198			$	8,306			$	18,498			$	690,906			$	709,404			$	3,919			$	9,882
Total loans and leases	$	13,007			$	8,557			$	11,913			$	33,477			$	4,702,551			$	4,736,028			$	3,919			$	17,322
	At December 31, 2013
	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	$	4,896			$	1,393			$	169			$	6,458			$	1,105,292			$	1,111,750			$	—			$	169
Multi-family mortgage	14,400				—				—				14,400				540,155				554,555				—				—
Construction	—				—				—				—				102,927				102,927				—				—
Total commercial real estate loans	19,296				1,393				169				20,858				1,748,374				1,769,232				—				169
Commercial loans and leases:
Commercial	2,288				75				842				3,205				294,479				297,684				—				1,551
Equipment financing	867				1,558				2,031				4,456				480,874				485,330				—				4,086
Condominium association	—				—				—				—				44,794				44,794				—				1
Total commercial loans and leases	3,155				1,633				2,873				7,661				820,147				827,808				—				5,638
Indirect automobile	5,407				857				229				6,493				394,038				400,531				10				259
Consumer loans:
Residential mortgage	201				—				415				616				410,938				411,554				—				1,713
Home equity	218				—				—				218				132,178				132,396				—				462
Other consumer	11				1				4				16				5,516				5,532				—				4
Total consumer loans	430				1				419				850				548,632				549,482				—				2,179
Total originated loans and leases	$	28,288			$	3,884			$	3,690			$	35,862			$	3,511,191			$	3,547,053			$	10			$	8,245
	At December 31, 2013
	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	$	1,221			$	87			$	4,887			$	6,195			$	344,040			$	350,235			$	3,958			$	929
Multi-family mortgage	327				—				1,052				1,379				71,999				73,378				1,052				—
Construction	—				409				—				409				10,369				10,778				—				—
Total commercial real estate loans	1,548				496				5,939				7,983				426,408				434,391				5,010				929
Commercial loans and leases:
Commercial	2,707				121				1,931				4,759				105,349				110,108				1,235				4,597
Equipment financing	46				41				73				160				27,534				27,694				73				29
Total commercial loans and leases	2,753				162				2,004				4,919				132,883				137,802				1,308				4,626
Consumer loans:
Residential mortgage	271				777				5,329				6,377				110,254				116,631				4,468				1,162
Home equity	1,259				552				895				2,706				122,359				125,065				117				1,525
Other consumer	6				11				4				21				1,502				1,523				—				14
Total consumer loans	1,536				1,340				6,228				9,104				234,115				243,219				4,585				2,701
Total acquired loans and leases	$	5,837			$	1,998			$	14,171			$	22,006			$	793,406			$	815,412			$	10,903			$	8,256
Total loan and leases	$	34,125			$	5,882			$	17,861			$	57,868			$	4,304,597			$	4,362,465			$	10,913			$	16,501
Commercial Real Estate Loans — At September 30, 2014, 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 — 34.0%; multi-family mortgage loans — 13.3%; and construction loans — 3.4%.
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 September 30, 2014, 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 — 10.5%; equipment financing loans — 12.2%; and loans to condominium associations — 1.0%.
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 September 30, 2014, indirect automobile loans represented 7.5% 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 September 30, 2014, 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 — 12.0%; home equity loans — 5.8%; 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 September 30, 2014												At December 31, 2013
	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	$	3,716			$	3,713			$	—			$	2,009			$	2,009			$	—
Commercial	9,410				9,392				—				4,410				4,399				—
Consumer	3,557				3,548				—				989				987				—
Total originated with no related allowance recorded	16,683				16,653				—				7,408				7,395				—
With an allowance recorded:
Commercial real estate	32				32				34				1,466				1,466				184
Commercial	1,175				1,174				531				2,393				2,383				675
Consumer	13				13				—				2,448				2,440				323
Total originated with an allowance recorded	1,220				1,219				565				6,307				6,289				1,182
Total originated impaired loans and leases	17,903				17,872				565				13,715				13,684				1,182
Acquired:
With no related allowance recorded:
Commercial real estate	10,092				10,116				—				9,176				10,082				—
Commercial	7,635				7,803				—				6,988				7,248				—
Consumer	6,663				6,663				—				1,033				1,037				—
Total acquired with no related allowance recorded	24,390				24,582				—				17,197				18,367				—
With an allowance recorded:
Commercial real estate	3,160				3,450				33				1,274				1,291				122
Commercial	760				760				203				1,020				1,067				169
Consumer	484				484				26				—				—				—
Total acquired with an allowance recorded	4,404				4,694				262				2,294				2,358				291
Total acquired impaired loans and leases	28,794				29,276				262				19,491				20,725				291
Total impaired loans and leases	$	46,697			$	47,148			$	827			$	33,206			$	34,409			$	1,473
(1)Includes originated and acquired nonaccrual loans of $5.2 million and $9.8 million, respectively at September 30, 2014.
(2)Includes originated and acquired nonaccrual loans of $5.8 million and $5.7 million, respectively at December 31, 2013.
	Three Months Ended
	30-Sep-14								30-Sep-13
	Average				Interest				Average				Interest
	Recorded				Income				Recorded				Income
	Investment				Recognized				Investment				Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	3,727			$	32			$	2,285			$	19
Commercial	9,567				118				5,661				48
Consumer	3,568				14				986				4
Total originated with no related allowance recorded	16,862				164				8,932				71
With an allowance recorded:
Commercial real estate	118				—				1,131				13
Commercial	1,239				1				1,070				3
Consumer	14				—				3,461				22
Total originated with an allowance recorded	1,371				1				5,662				38
Total originated impaired loans and leases	18,233				165				14,594				109
Acquired:
With no related allowance recorded:
Commercial real estate	11,652				73				9,305				36
Commercial	8,017				36				5,790				38
Consumer	6,629				13				1,335				4
Total acquired with no related allowance recorded	26,298				122				16,430				78
With an allowance recorded:
Commercial real estate	3,164				36				3,975				42
Commercial	760				—				1,043				—
Consumer	538				1				—				—
Total acquired with an allowance recorded	4,462				37				5,018				42
Total acquired impaired loans and leases	30,760				159				21,448				120
Total impaired loans and leases	$	48,993			$	324			$	36,042			$	229
	Nine Months Ended
	30-Sep-14								30-Sep-13
	Average				Interest				Average				Interest
	Recorded				Income				Recorded				Income
	Investment				Recognized				Investment				Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	2,857			$	80			$	2,200			$	69
Commercial	6,386				188				4,031				109
Consumer	2,509				27				1,108				26
Total originated with no related allowance recorded	11,752				295				7,339				204
With an allowance recorded:
Commercial real estate	1,097				22				1,516				26
Commercial	2,898				49				1,810				14
Consumer	1,298				15				3,317				82
Total originated with an allowance recorded	5,293				86				6,643				122
Total originated impaired loans and leases	17,045				381				13,982				326
Acquired:
With no related allowance recorded:
Commercial real estate	13,211				301				9,783				178
Commercial	7,671				95				4,800				93
Consumer	6,569				23				1,379				17
Total acquired with no related allowance recorded	27,451				419				15,962				288
With an allowance recorded:
Commercial real estate	3,035				76				2,776				42
Commercial	1,085				15				385				—
Consumer	436				2				—				—
Total acquired with an allowance recorded	4,556				93				3,161				42
Total acquired impaired loans and leases	32,007				512				19,123				330
Total impaired loans and leases	$	49,052			$	893			$	33,105			$	656
The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated:
	At September 30, 2014
	Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated				Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	34			$	531			$	—			$	—			$	—			$	565
Collectively evaluated for impairment	28,344				13,187				3,461				2,909				2,423				50,324
Total originated loans and leases	28,378				13,718				3,461				2,909				2,423				50,889
Acquired:
Individually evaluated for impairment	—				123				—				26				—				149
Collectively evaluated for impairment	145				(103		)		—				2				—				44
Acquired with deteriorated credit quality	897				211				—				632				—				1,740
Total acquired loans and leases	1,042				231				—				660				—				1,933
Total allowance for loan and lease losses	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
Loans and Leases:
Originated:
Individually evaluated for impairment	$	3,749			$	10,585			$	—			$	3,569			$	—			$	17,903
Collectively evaluated for impairment	2,025,204				990,362				353,263				639,892				—				4,008,721
Total originated loans and leases	2,028,953				1,000,947				353,263				643,461				—				4,026,624
Acquired:
Individually evaluated for impairment	1,131				4,581				—				2,558				—				8,270
Collectively evaluated for impairment	121,285				87,850				—				141,328				—				350,463
Acquired with deteriorated credit quality	251,354				28,475				—				70,842				—				350,671
Total acquired loans and leases	373,770				120,906				—				214,728				—				709,404
Total loans and leases	$	2,402,723			$	1,121,853			$	353,263			$	858,189			$	—			$	4,736,028
	At December 31, 2013
	Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated				Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	184			$	675			$	—			$	323			$	—			$	1,182
Collectively evaluated for impairment	22,336				14,056				3,924				2,414				2,932				45,662
Total originated loans and leases	22,520				14,731				3,924				2,737				2,932				46,844
Acquired:
Individually evaluated for impairment	—				3				—				—				—				3
Collectively evaluated for impairment	(54		)		234				—				204				—				384
Acquired with deteriorated credit quality	556				252				—				434				—				1,242
Total acquired loans and leases	502				489				—				638				—				1,629
Total allowance for loan and lease losses	$	23,022			$	15,220			$	3,924			$	3,375			$	2,932			$	48,473
Loans and Leases:
Originated:
Individually evaluated for impairment	$	3,643			$	6,634			$	—			$	3,438			$	—			$	13,715
Collectively evaluated for impairment	1,765,589				821,174				400,531				546,044				—				3,533,338
Total originated loans and leases	1,769,232				827,808				400,531				549,482				—				3,547,053
Acquired:
Individually evaluated for impairment	2,625				4,878				—				872				—				8,375
Collectively evaluated for impairment	145,057				93,565				—				162,595				—				401,217
Acquired with deteriorated credit quality	286,709				39,359				—				79,752				—				405,820
Total acquired loans and leases	434,391				137,802				—				243,219				—				815,412
Total loans and leases	$	2,203,623			$	965,610			$	400,531			$	792,701			$	—			$	4,362,465
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 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 September 30, 2014
	Recorded Investment											Specific								Defaulted
	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	1			$	1,970			$	1,970			$	—			$	—			$	—			—			—
Equipment financing	5			696				699				18				191				—				—			—
Total Originated	6			2,666				2,669				18				191				—				—			—
Acquired:
Commercial	4			851				924				—				45				—				1			1,335
Total Acquired	4			851				924				—				45				—				1			1,335
Total	10			$	3,517			$	3,593			$	18			$	236			$	—			1			$	1,335
	At and for the Three Months Ended September 30, 2013
	Recorded Investment											Specific								Defaulted
	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	—			$	—			$	—			$	—			$	—			$	—			1			$	1,731
Equipment financing	1			558				558				12				—				—				1			537
Total Originated	1			558				558				12				—				—				2			2,268
Acquired:
Commercial real estate mortgage	1			737				737				—				—				—				—			—
Commercial	2			553				520				—				—				—				1			962
Total Acquired	3			1,290				1,257				—				—				—				1			962
Total	4			$	1,848			$	1,815			$	12			$	—			$	—			3			$	3,230
	At and for the Nine Months Ended September 30, 2014
	Recorded Investment											Specific								Defaulted
	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			$	939			$	—			$	—			$	—			—			$	—
Commercial	3			2,360				2,336				—				16				—				—			—
Equipment financing	7			1,369				1,352				18				191				—				6			1,074
Residential mortgage	1			497				491				—				491				—				1			491
Home equity	1			292				292				—				—				—				—			—
Total Originated	13			5,471				5,410				18				698				—				7			1,565
Acquired:
Commercial	6			1,104				1,152				—				273				—				4			1,607
Total Acquired	6			1,104				1,152				—				273				—				4			1,607
Total	19			$	6,575			$	6,562			$	18			$	971			$	—			11			$	3,172
	At and for the Nine Months Ended September 30, 2013
	Recorded Investment											Specific								Defaulted
	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			$	1,039			$	—			$	—			$	—			$	—			—			$	—
Commercial	—			—				—				—				—				—				1			1,731
Equipment financing	9			1,683				1,687				54				372				—				1			537
Residential mortgage	1			415				372				—				—				—				—			—
Total Originated	11			3,137				2,059				54				372				—				2			2,268
Acquired:
Commercial real estate mortgage	1			737				737				—				—				—				—			—
Commercial	3			977				941				—				421				—				1			962
Total Acquired	4			1,714				1,678				—				421				—				1			962
Total	15			$	4,851			$	3,737			$	54			$	793			$	—			3			$	3,230
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 September 30,								Nine Months Ended September 30,
	2014				2013				2014				2013
	(In Thousands)
Loans with one modification:
Extended maturity	$	2,849			$	1,257			$	3,427			$	1,257
Adjusted principal	—				—				—				372
Adjusted interest rate	—				558				866				1,351
Interest only	—				—				16				—
Combination maturity, principal, interest rate	200				—				200				757
Total loans with one modification	$	3,049			$	1,815			$	4,509			$	3,737
Loans with more than one modification:
Extended maturity	$	36			$	—			$	1,253			$	—
Adjusted principal	508				—				508				—
Interest only	—				—				292				—
Total loans with more than one modification	$	544			$	—			$	2,053			$	—
The financial impact of the modification of performing and nonperforming loans and leases for the three months ended September 30, 2014 and 2013 was less than $0.1 million and $0.2 million, respectively. The financial impact of the modification of performing or nonperforming loans and leases for the nine months ended September 30, 2014 and 2013 was $0.1 million and $0.5 million, respectively.
As of September 30, 2014 and 2013, there were no commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings.

Premises_and_Equipment_Notes

Premises and Equipment (Notes)	9 Months Ended
	Sep. 30, 2014
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 nine months ended September 30, 2014, which is included in gain on sale/disposals of premises and equipment, net in the Company’s unaudited consolidated statements of income.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	The following table sets forth the composition of goodwill and other intangible assets at the dates indicated:
		At September 30, 2014		At December 31, 2013
		(In Thousands)
	Goodwill	$	137,890	$	137,890
	Other intangible assets:
	Core deposits	13,282		15,777
	Trade name	1,089		1,089
	Trust relationship	—		21
	Total other intangible assets	14,371		16,887
	Total goodwill and other intangible assets	$	152,261	$	154,777
	As of December 31, 2013, the Company has concluded that the BankRI name will continue to be utilized in its marketing strategies; therefore, the trade name with a carrying value of $1.1 million has an indefinite life and ceased to amortize.
	The estimated aggregate future amortization expense (in thousands) for intangible assets with a finite life remaining at September 30, 2014 is as follows:
	Remainder of 2014	$	608
	Year ending:
	2015	2,868
	2016	2,457
	2017	1,858
	2018	1,836
	Thereafter	3,655
	Total	$	13,282

Borrowed_Funds_Notes

Borrowed Funds (Notes)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Borrowed Funds	'
	Borrowed Funds
	On September 15, 2014, the Company offered $75.0 million of 6.0% fixed-to-floating subordinated notes due September 15, 2029. The Company pays 6.0% interest semiannually between September 2014 and September 2024. Subsequently, the Company pays 3-month LIBOR plus 3.315% quarterly until the notes mature in September 2029. As of September 30, 2014, the Company capitalized $1.5 million in relation to the issuance of these subordinated notes.
	The following table summarizes the Company's subordinated debentures and notes at the dates indicated.
					Carrying Amount at September 30, 2014		Carrying Amount at December 31, 2013
	Issue Date	Rate	Maturity Date	Next Call Date
	(Dollars in Thousands)
	June 26, 2003	Variable; 3-month LIBOR + 3.10%	June 26, 2033	December 26, 2014	$	4,688	$	4,666
	March 17, 2004	Variable; 3-month LIBOR + 2.79%	March 17, 2034	December 17, 2014	$	4,532	$	4,497
	15-Sep-14	6.0% Fixed-to-Variable; 3-month LIBOR + 3.315%	15-Sep-29	15-Sep-24	$	73,543	$	—
	The above carrying amounts of the acquired subordinated debentures included $0.8 million of accretion adjustments as of September 30, 2014.

Comprehensive_IncomeLoss

Comprehensive Income/(Loss)	9 Months Ended
	Sep. 30, 2014
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 and nine months ended September 30, 2014 and September 30, 2013, the Company’s other comprehensive income (loss) include the following two components: (i) unrealized holding gains (losses) on investment securities available-for-sale; and (ii) adjustment of accumulated obligation for postretirement benefits.
	Changes in accumulated other comprehensive (loss) income by component, net of tax, were as follows for the periods indicated:
		Three Months Ended September 30, 2014
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at June 30, 2014	$	(3,574	)	$	365		$	(3,209	)
	Other comprehensive loss	(1,407		)	(65		)	(1,472		)
	Balance at September 30, 2014	$	(4,981	)	$	300		$	(4,681	)
		Three Months Ended September 30, 2013
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at June 30, 2013	$	(4,572	)	$	131		$	(4,441	)
	Other comprehensive loss	(459		)	—			(459		)
	Balance at September 30, 2013	$	(5,031	)	$	131		$	(4,900	)
		Nine Months Ended September 30, 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)	3,351			(117		)	3,234
	Balance at September 30, 2014	$	(4,981	)	$	300		$	(4,681	)
		Nine Months Ended September 30, 2013
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2012	$	3,358		$	125		$	3,483
	Other comprehensive (loss) income	(8,389		)	6			(8,383		)
	Balance at September 30, 2013	$	(5,031	)	$	131		$	(4,900	)
	The following is a summary of the amounts reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2014.
		Nine Months Ended			Income Statement Line Affected by Reclassification
		September 30, 2014
		(In Thousands)
	Other comprehensive income (loss) component
	Unrealized gains (losses) on investment securities available-for-sale	$	(13	)	Loss on sales of securities, net
		5			Provision for income taxes
	Total reclassifications for the period	$	(8	)	Net income
	The Company did not reclassify any amounts out of accumulated other comprehensive income (loss) for the three months ended September 30, 2014 and the three and nine months ended September 30, 2013.

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 or December 31, 2013.
	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 16 interest-rate swaps related to this program with an aggregate notional amount of $65.7 million at September 30, 2014, compared with 8 interest-rate swaps with an aggregate notional amount of $22.4 million at December 31, 2013.
	Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments at September 30, 2014 and December 31, 2013.
		At September 30, 2014				At December 31, 2013
		Asset		Liability		Asset		Liability
		Derivatives		Derivatives		Derivatives		Derivatives
		(In Thousands)
	Total derivatives (interest-rate products) not designated as hedging instruments	$	1,310	$	1,303	$	825	$	856
	Changes in the fair value are recognized directly in the Company's unaudited consolidated statements of income and are included in loan fees 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 and nine months ended September 30, 2014 and September 30, 2013.
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(In Thousands)
	Gain (loss) recognized in income on derivatives	$	32	$	1	$	38	$	(24	)
	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 Company had no net credit risk exposure at September 30, 2014. The estimated net credit risk exposure was $31.2 thousand at December 31, 2013.
	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 $3.6 million and $2.8 million in the normal course of business at September 30, 2014 and December 31, 2013, 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 September 30, 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	$	1,310	$	—	$	1,310	$	—		$	—	$	1,310
	Liability Derivatives	$	1,303	$	—	$	1,303	$	—		$	3,628	$	4,931
		At December 31, 2013
		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	$	825	$	—	$	825	$	—		$	—	$	825
	Liability Derivatives	$	856	$	—	$	856	$	—		$	2,811	$	3,667
	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	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Based Compensation	'
	Stock Based Compensation
	As of September 30, 2014, the Company had three active recognition and retention plans: the 2003 Recognition and Retention Plan (the "2003 RRP") with 1,250,000 authorized shares, the 2011 Restricted Stock Award Plan ("2011 RSA") with 500,000 authorized shares and the 2014 Equity Incentive Plan ("2014 Plan" and with the 2003 RRP and the 2011 RSA, collectively referred to as the "Plans") with 1,750,000 authorized shares. 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, 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 22 financial institutions. These are referred to as "performance-based shares". The specific performance measure targets relate to return on assets, return on equity, asset quality and total return to stockholders (share price appreciation from date of award plus dividends paid as a percent of the Company's common stock share price on the date of award). If a participant leaves the Company prior to the third anniversary date of an award, any unvested shares will be forfeited. Dividends declared with respect to shares awarded will be held by the Company and paid to the participant only when the shares vest.
	Under all the Plans, shares of the Company's common stock were reserved for issuance as restricted stock awards to officers, employees, and non-employee directors of the Company. Shares issued upon vesting may be either authorized but unissued shares or reacquired shares held by the Company as treasury shares. Any shares not issued because vesting requirements are not met will be retired back to treasury and be made available again for issuance under the Plans.
	Total expense for the Plans was $1.0 million and $0.9 million for the nine months ended September 30, 2014 and 2013, respectively.

Earnings_per_Share

Earnings per Share	9 Months Ended
	Sep. 30, 2014
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
		30-Sep-14				30-Sep-13
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	11,581	$	11,581	$	9,429	$	9,429
	Denominator:
	Weighted average shares outstanding	69,989,909		69,989,909		69,830,953		69,830,953
	Effect of dilutive securities	—		99,078		—		82,812
	Adjusted weighted average shares outstanding	69,989,909		70,088,987		69,830,953		69,913,765
	EPS	$	0.17	$	0.17	$	0.14	$	0.13
		Nine Months Ended
		30-Sep-14				30-Sep-13
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	31,979	$	31,979	$	27,732	$	27,732
	Denominator:
	Weighted average shares outstanding	69,918,248		69,918,248		69,789,737		69,789,737
	Effect of dilutive securities	—		111,135		—		70,985
	Adjusted weighted average shares outstanding	69,918,248		70,029,383		69,789,737		69,860,722
	EPS	$	0.46	$	0.46	$	0.4	$	0.4

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2014
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 and nine months ended September 30, 2014 and September 30, 2013.
	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 September 30, 2014
		Level 1		Level 2			Level 3			Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	GSEs	$	—	$	15,790		$	—		$	15,790
	GSE CMOs	—		237,228			—			237,228
	GSE MBSs	—		231,512			—			231,512
	SBA commercial loan asset-backed securities	—		210			—			210
	Corporate debt obligations	—		40,099			—			40,099
	Trust preferred securities	—		1,305			—			1,305
	Marketable equity securities	1,372		—			—			1,372
	Total investment securities available-for-sale	$	1,372	$	526,144		$	—		$	527,516
	Interest-rate swaps	$	—	$	1,310		$	—		$	1,310
	Liabilities:
	Interest-rate swaps	$	—	$	1,303		$	—		$	1,303
		Carrying Value at December 31, 2013
		Level 1		Level 2			Level 3			Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	GSEs	$	—	$	12,180		$	—		$	12,180
	GSE CMOs	—		243,644			—			243,644
	GSE MBSs	—		199,401			—			199,401
	Private-label CMOs	—		3,355			—			3,355
	SBA commercial loan asset-backed securities	—		243			—			243
	Auction-rate municipal obligations	—		—			1,775			1,775
	Municipal obligations	—		1,086			—			1,086
	Corporate debt obligations	—		28,224			—			28,224
	Trust preferred securities	—		1,210			—			1,210
	Marketable equity securities	1,310		—			—			1,310
	Total investment securities available-for-sale	$	1,310	$	489,343		$	1,775		$	492,428
	Interest-rate swaps	$	—	$	825		$	—		$	825
	Liabilities:
	Interest-rate swaps	$	—	$	856		$	—		$	856
	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 September 30,					Nine Months Ended September 30,
		2014		2013			2014			2013
		(In Thousands)
	Investment securities available-for-sale, beginning of period	$	—	$	2,835		$	1,775		$	2,917
	Investment security sales	—		—			(1,658		)	—
	Principal paydowns and other	—		(10		)	—			(341		)
	Total realized losses included in other income	—		—			(242		)	—
	Total unrealized losses included in other comprehensive income	—		30			125			279
	Investment securities available-for-sale, end of period	$	—	$	2,855		$	—		$	2,855
	There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during the three months and nine months ended September 30, 2014 and 2013.
	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 September 30, 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	$	—	$	—		$	6,358		$	6,358
	Other real estate owned	—		—			1,536			1,536
Repossessed vehicles and equipment	—		927			—			927
Total assets measured at fair value on a non-recurring basis	$	—	$	927		$	7,894		$	8,821
	Carrying Value at December 31, 2013
	Level 1		Level 2			Level 3			Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—		$	12,099		$	12,099
Other real estate owned	—		—			577			577
Repossessed vehicles and equipment	—		1,001			—			1,001
Total assets measured at fair value on a non-recurring basis	$	—	$	1,001		$	12,676		$	13,677
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 Vehicles and Equipment
Repossessed vehicles and equipment 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		Unobservable Input	Range		Weighted Average
											Discount Rates
	At September 30, 2014		At December 31, 2013
	(Dollars in Thousands)
Auction-rate municipal obligations	$	—	$	1,775		Discounted cash flow		Discount rate	0-5%		4.00%
Collateral-dependent impaired loans and leases	$	6,358	$	12,099		Appraisal of collateral (1)
Other real estate owned	$	1,536	$	577		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 September 30, 2014
Financial assets:
Investment securities held-to-maturity	$	500	$	500		$	—		$	—		$	500
Loans held-for-sale	464		464			—			464			—
Loans and leases, net	4,683,206		4,783,157			—			—			4,783,157
Financial liabilities:
Certificates of deposit	907,432		910,634			—			910,634			—
Borrowed funds	1,132,865		1,140,450			—			1,140,450			—
At December 31, 2013
Financial assets:
Investment securities held-to-maturity	$	500	$	500		$	—		$	—		$	500
Loans held-for-sale	13,372		13,372			—			13,372			—
Loans and leases, net	4,313,992		4,552,556			—			—			4,552,556
Financial liabilities:
Certificates of deposit	934,668		938,703			—			938,703			—
Borrowed funds	812,555		815,910			—			815,910			—
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	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014		At December 31, 2013
		(In Thousands)
	Financial instruments whose contract amounts represent credit risk:
	Commitments to originate loans and leases:
	Commercial real estate	$	45,655	$	48,973
	Commercial	112,079		143,252
	Residential mortgage	15,792		8,027
	Unadvanced portion of loans and leases	610,087		586,279
	Unused lines of credit:
	Home equity	234,180		205,665
	Other consumer	11,100		6,503
	Other commercial	1,081		1,035
	Unused letters of credit:
	Financial standby letters of credit	18,257		20,410
	Performance standby letters of credit	3,116		2,989
	Commercial and similar letters of credit	2,057		440
	Back-to-back interest-rate swaps	65,746		22,418
	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 $1.3 million at September 30, 2014 and $1.0 million at December 31, 2013.
	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 both $1.3 million at September 30, 2014. The fair value of interest rate swap assets and liabilities is $0.8 million and $0.9 million, respectively, at December 31, 2013.
	Lease Commitments
	The Company leases certain office space under various 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 2014	1,360
	Year ending:
	2015	5,529
	2016	5,390
	2017	4,860
	2018	4,285
	Thereafter	15,606
	Total	$	37,030
	The leases contain escalator clauses for real estate taxes and other expenditures. Total rental expense was $5.2 million during the nine months ended September 30, 2014, which included $0.7 million in lease acceleration related to a relocation of an operations center and a closure of a branch property. This compared to $4.0 million during the nine months ended September 30, 2013.
	Legal Proceedings
	In September 2014, the Company received a $1.8 million payment from an insurance carrier in relation to the settlement of a 2012 litigation. The Company recorded $1.4 million in other income, net of $0.4 million of accrued legal expenses.
	In addition to the above disclosed settlement, 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)	9 Months Ended
	Sep. 30, 2014
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, 2013.
	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. These reclassifications did not change stockholders' equity and net income reported.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-15, Disclosures of Uncertainties About an Entity’s Ability to Continue as a Going Concern. This ASU provides guidance on determining when and how reporting entities must disclose going concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The ASU is effective for interim and annual periods beginning after December 15, 2016; early application is permitted. The Company has chosen not to early adopt ASU 2014-15. Management do not expect material impact, if any, as of September 30, 2014.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. This ASU eliminates sale accounting for repurchase-to-maturity transactions and supersedes the guidance under which a transfer of a financial asset and a contemporaneous repurchase financing could be accounted for on a combined basis as a forward agreement. In addition, the ASU requires a new disclosure for transactions economically similar to repurchase agreements in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets throughout the term of the transaction. The ASU is effective for annual periods beginning after December 15, 2014 and interim periods beginning after December 15, 2015; early application is not permitted. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In May 2014, the FASB issued ASU 2014-09, Revenue From Contracts with Customers. This ASU provides a single principles-based, five-step model to be applied to all contracts with customers. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The ASU is effective for annual periods (including interim reporting periods within those periods) beginning after December 15, 2016; early application is not permitted. The Company is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In January 2014, the FASB issued ASU 2014-04, Receivables-Troubled Debt Restructurings by Creditors. This ASU provides clarification on when an in substance repossession or foreclosure occurs resulting in the creditor derecognizing the loan and recognizing the collateral. Currently, there is no definition of in substance repossession or foreclosure and physical possession in the accounting literature. This ASU is applied retrospectively or effective prospectively for all annual periods presented beginning after December 15, 2014; early adoption is permitted. The Company has chosen not to early adopt ASU 2014-04 and is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.
	In January 2014, the FASB issued ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. This ASU provides guidance on accounting for investments by a reporting entity in flow-through limited liability entities. Currently, investments in qualified affordable housing projects are accounted for either by the effective yield, equity or cost method. This ASU allows for reporting entities to make a policy election on how to account for their investments. This ASU is applied retrospectively or effective prospectively for all annual periods presented beginning after December 15, 2014; early adoption is permitted. The Company has chosen not to early adopt ASU 2014-01 and is currently assessing the applicability of this ASU and has not determined the impact, if any, as of September 30, 2014.

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Amortized				Gross		Gross			Estimated
		Cost				Unrealized		Unrealized			Fair Value
						Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	15,839			$	3	$	52		$	15,790
	GSE CMOs	245,380				108		8,260			237,228
	GSE MBSs	231,636				1,971		2,095			231,512
	SBA commercial loan asset-backed securities	212				—		2			210
	Corporate debt obligations	39,782				371		54			40,099
	Trust preferred securities	1,463				—		158			1,305
	Total debt securities	534,312				2,453		10,621			526,144
	Marketable equity securities	1,266				108		2			1,372
	Total investment securities available-for-sale	$	535,578			$	2,561	$	10,623		$	527,516
	Investment securities held-to-maturity	$	500			$	—	$	—		$	500
		At December 31, 2013
		Amortized				Gross		Gross			Estimated
		Cost				Unrealized		Unrealized			Fair Value
						Gains		Losses
		(In Thousands)
	Debt securities:
	GSEs	$	12,138			$	42	$	—		$	12,180
	GSE CMOs	254,331				86		10,773			243,644
	GSE MBSs	202,478				1,852		4,929			199,401
	Private-label CMOs	3,258				115		18			3,355
	SBA commercial loan asset-backed securities	245				—		2			243
	Auction-rate municipal obligations	1,900				—		125			1,775
	Municipal obligations	1,068				18		—			1,086
	Corporate debt obligations	27,751				506		33			28,224
	Trust preferred securities	1,461				—		251			1,210
	Total debt securities	504,630				2,619		16,131			491,118
	Marketable equity securities	1,259				61		10			1,310
	Total investment securities available-for-sale	$	505,889			$	2,680	$	16,141		$	492,428
	Investment securities held-to-maturity	$	500			$	—	$	—		$	500
Investment securities in a continuous unrealized loss position	'
	Investment securities at September 30, 2014 and December 31, 2013 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:
		At September 30, 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)
	Debt securities:
	GSEs	$	10,767			$	52	$	—		$	—		$	10,767		$	52
	GSE CMOs	43,509				1,361		188,640			6,899			232,149			8,260
	GSE MBSs	59,932				208		86,466			1,887			146,398			2,095
	SBA commercial loan asset-backed securities	8				—		192			2			200			2
	Corporate debt obligations	14,962				54		—			—			14,962			54
	Trust preferred securities	—				—		1,305			158			1,305			158
	Temporarily impaired debt securities	129,178				1,675		276,603			8,946			405,781			10,621
	Marketable equity securities	510				2		—			—			510			2
	Total temporarily impaired investment securities	$	129,688			$	1,677	$	276,603		$	8,946		$	406,291		$	10,623
		At December 31, 2013
		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)
	Debt securities:
	GSE CMOs	$	221,317			$	9,861	$	16,257		$	912		$	237,574		$	10,773
	GSE MBSs	121,836				3,746		13,516			1,183			135,352			4,929
	Private-label CMOs	639				18		—			—			639			18
	SBA commercial loan asset-backed securities	32				—		192			2			224			2
	Auction-rate municipal obligations	—				—		1,775			125			1,775			125
	Corporate debt obligations	5,988				33		—			—			5,988			33
	Trust preferred securities	—				—		1,210			251			1,210			251
	Temporarily impaired debt securities	349,812				13,658		32,950			2,473			382,762			16,131
	Marketable equity securities	501				10		—			—			501			10
	Total temporarily impaired investment securities	$	350,313			$	13,668	$	32,950		$	2,473		$	383,263		$	16,141
Schedule of maturities of the investments in debt securities	'
	The maturities of the debt securities are as follows at the dates indicated:
		At September 30, 2014								At December 31, 2013
		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	$	8,168			$	8,210	1.59	%	$	13,012		$	13,062		0.82	%
	After 1 year through 5 years	49,866				50,779		2.61	%	40,204			41,187			2.9	%
	After 5 years through 10 years	96,209				96,645		1.99	%	66,447			67,075			2.23	%
	Over 10 years	380,069				370,510		1.93	%	384,967			369,794			1.9	%
		$	534,312			$	526,144	2	%	$	504,630		$	491,118		2	%
	Investment securities held-to-maturity:
	Within 1 year	$	—			$	—	—	%	$	500		$	500		1.99	%
	After 1 year through 5 years	500				500		1.3	%	—			—			—	%
		$	500			$	500	1.3	%	$	500		$	500		1.99	%
Schedule of security sales	'
	The following table shows the gross realized gains and losses on available for sale securities for the periods indicated:
			Nine Months Ended September 30, 2014
		(In Thousands)
	Sales of debt securities		$	5,083
	Gross gains from sales		302
	Gross losses from sales		315
	Loss on sales of securities, net		$	(13	)

Loans_and_Leases_Tables

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 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	$	1,313,218		4.23	%		$	297,374			4.35	%		$	1,610,592	4.25	%
	Multi-family mortgage	564,536			4.13	%		66,316				4.51	%		630,852		4.17	%
	Construction	151,199			3.82	%		10,080				4.45	%		161,279		3.85	%
	Total commercial real estate loans	2,028,953			4.17	%		373,770				4.38	%		2,402,723		4.2	%
	Commercial loans and leases:
	Commercial	390,912			3.71	%		104,800				4.29	%		495,712		3.83	%
	Equipment financing	560,435			6.95	%		16,106				6.29	%		576,541		6.93	%
	Condominium association	49,600			4.64	%		—				—	%		49,600		4.64	%
	Total commercial loans and leases	1,000,947			5.57	%		120,906				4.56	%		1,121,853		5.46	%
	Indirect automobile loans	353,263			4.54	%		—				—	%		353,263		4.54	%
	Consumer loans:
	Residential mortgage	466,309			3.61	%		103,819				3.83	%		570,128		3.65	%
	Home equity	164,536			3.37	%		110,226				3.85	%		274,762		3.56	%
	Other consumer	12,616			4.74	%		683				14.97	%		13,299		5.27	%
	Total consumer loans	643,461			3.57	%		214,728				3.88	%		858,189		3.65	%
	Total loans and leases	$	4,026,624		4.45	%		$	709,404			4.26	%		$	4,736,028	4.42	%
		At December 31, 2013
		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	$	1,111,750		4.34	%		$	350,235			4.42	%		$	1,461,985	4.36	%
	Multi-family mortgage	554,555			4.19	%		73,378				4.63	%		627,933		4.24	%
	Construction	102,927			3.81	%		10,778				4.37	%		113,705		3.87	%
	Total commercial real estate loans	1,769,232			4.26	%		434,391				4.46	%		2,203,623		4.3	%
	Commercial loans and leases:
	Commercial	297,684			3.68	%		110,108				4.54	%		407,792		3.91	%
	Equipment financing	485,330			7.14	%		27,694				6.6	%		513,024		7.11	%
	Condominium association	44,794			4.74	%		—				—	%		44,794		4.74	%
	Total commercial loans and leases	827,808			5.77	%		137,802				4.95	%		965,610		5.65	%
	Indirect automobile loans	400,531			4.98	%		—				—	%		400,531		4.98	%
	Consumer loans:
	Residential mortgage	411,554			3.65	%		116,631				3.93	%		528,185		3.71	%
	Home equity	132,396			3.39	%		125,065				3.88	%		257,461		3.63	%
	Other consumer	5,532			5.98	%		1,523				14.89	%		7,055		7.9	%
	Total consumer loans	549,482			3.61	%		243,219				3.98	%		792,701		3.72	%
	Total loans and leases	$	3,547,053		4.59	%		$	815,412			4.38	%		$	4,362,465	4.55	%
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 September 30,							Nine Months Ended September 30,
		2014			2013				2014				2013
		(In Thousands)
	Balance at beginning of period	$	38,178		$	52,182			$	45,789			$	57,812
	Reclassification from nonaccretable difference for loans with improved cash flows	2,141			1,537				3,795				6,913
	Accretion	(3,806		)	(5,029		)		(13,071		)		(16,035		)
	Balance at end of period	$	36,513		$	48,690			$	36,513			$	48,690
Summary of the change in the total amounts of loans and advances, all of which were performing, to directors, executive officers and their affiliates	'
	The following table summarizes the change in the total amounts of loans and advances, to directors, executive officers and their affiliates for the periods indicated. All loans were performing at September 30, 2014 and December 31, 2013.
		Nine Months Ended September 30,
		2014			2013
		(In Thousands)
	Balance at beginning of period	$	16,110		$	4,083
	New loans granted during the period	1,726			498
	Advances on lines of credit	1,803			6,163
	Repayments	(9,803		)	(887		)
	Loans no longer classified as related party loans	(1,016		)	10,753
	Balance at end of period	$	8,820		$	20,610

Allowance_for_Loan_and_Lease_L1

Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at June 30, 2014	$	26,715			$	15,866			$	3,686			$	3,017			$	2,402			$	51,686
	Charge-offs	(64		)		(605		)		(264		)		(203		)		—				(1,136		)
	Recoveries	—				261				55				27				—				343
	Provision (credit) for loan and lease losses	2,769				(1,573		)		(16		)		728				21				1,929
	Balance at September 30, 2014	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
		Three Months Ended September 30, 2013
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at June 30, 2013	$	22,019			$	11,791			$	4,695			$	2,999			$	2,777			$	44,281
	Charge-offs	(7		)		(219		)		(510		)		(167		)		—				(903		)
	Recoveries	—				62				116				104				—				282
	Provision for loan and lease losses	447				2,036				15				179				53				2,730
	Balance at September 30, 2013	$	22,459			$	13,670			$	4,316			$	3,115			$	2,830			$	46,390
		Nine Months Ended September 30, 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	(64		)		(1,952		)		(781		)		(585		)		—				(3,382		)
	Recoveries	—				730				332				141				—				1,203
	Provision (credit) for loan and lease losses	6,462				(49		)		(14		)		638				(509		)		6,528
	Balance at September 30, 2014	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
		Nine Months Ended September 30, 2013
		Commercial				Commercial				Indirect				Consumer				Unallocated				Total
		Real Estate								Automobile
		(In Thousands)
	Balance at December 31, 2012	$	20,018			$	10,655			$	5,304			$	2,545			$	2,630			$	41,152
	Charge-offs	(88		)		(943		)		(1,190		)		(373		)		—				(2,594		)
	Recoveries	4				326				395				190				—				915
	Provision (credit) for loan and lease losses	2,525				3,632				(193		)		753				200				6,917
	Balance at September 30, 2013	$	22,459			$	13,670			$	4,316			$	3,115			$	2,830			$	46,390
Schedule of provisions for credit losses	'
	The provision for credit losses are set forth below for the periods indicated:
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
		(In Thousands)
	Provision (credit) for loan and lease losses:
	Commercial real estate	$	2,769			$	447			$	6,462			$	2,525
	Commercial	(1,573		)		2,036				(49		)		3,632
	Indirect automobile	(16		)		15				(14		)		(193		)
	Consumer	728				179				638				753
	Unallocated	21				53				(509		)		200
	Total provision for loan and lease losses	1,929				2,730				6,528				6,917
	Unfunded credit commitments	105				18				225				125
	Total provision for credit losses	$	2,034			$	2,748			$	6,753			$	7,042
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 September 30, 2014 by credit quality indicator.
		At September 30, 2014
		Commercial				Multi-				Construction				Commercial				Equipment				Condominium				Other
		Real Estate				Family												Financing				Association				Consumer
		Mortgage				Mortgage
		(In Thousands)
	Originated:
	Loan rating:
	Pass	$	1,303,529			$	564,171			$	151,199			$	380,023			$	556,230			$	49,600			$	12,606
	OAEM	8,626				365				—				8,701				1,009				—				—
	Substandard	1,063				—				—				1,030				2,510				—				10
	Doubtful	—				—				—				1,158				686				—				—
	Total originated	1,313,218				564,536				151,199				390,912				560,435				49,600				12,616
	Acquired:
	Loan rating:
	Pass	279,812				63,327				9,843				94,492				16,015				—				672
	OAEM	8,842				723				237				2,450				—				—				—
	Substandard	8,674				2,266				—				7,704				91				—				11
	Doubtful	46				—				—				154				—				—				—
	Total acquired	297,374				66,316				10,080				104,800				16,106				—				683
	Total loans	$	1,610,592			$	630,852			$	161,279			$	495,712			$	576,541			$	49,600			$	13,299
	At September 30, 2014, there were no loans categorized as definite loss.
		At September 30, 2014
		Indirect Automobile
		(In Thousands)				(Percent)
	Originated:
	Credit score:
	Over 700	$	291,648			82.6	%
	661-700	48,926				13.8	%
	660 and below	11,007				3.1	%
	Data not available	1,682				0.5	%
	Total loans	$	353,263			100	%
		At September 30, 2014
		Residential Mortgage							Home Equity
		(In Thousands)				(Percent)			(In Thousands)				(Percent)
	Originated:
	Loan-to-value ratio:
	Less than 50%	$	102,788			18	%		$	101,061			36.8	%
	50% - 69%	166,126				29.1	%		33,576				12.2	%
	70% - 79%	172,458				30.3	%		24,805				9	%
	80% and over	23,275				4.1	%		4,129				1.5	%
	Data not available	1,662				0.3	%		965				0.4	%
	Total originated	466,309				81.8	%		164,536				59.9	%
	Acquired:
	Loan-to-value ratio:
	Less than 50%	19,858				3.5	%		73,237				26.7	%
	50% - 69%	36,313				6.4	%		23,751				8.6	%
	70% - 79%	25,974				4.6	%		11,200				4.1	%
	80% and over	17,358				3	%		1,185				0.4	%
	Data not available	4,316				0.7	%		853				0.3	%
	Total acquired	103,819				18.2	%		110,226				40.1	%
	Total loans	$	570,128			100	%		$	274,762			100	%
	The following tables present the recorded investment in loans in each class at December 31, 2013 by credit quality indicator.
		At December 31, 2013
		Commercial				Multi-				Construction				Commercial				Equipment				Condominium				Other
		Real Estate				Family												Financing				Association				Consumer
		Mortgage				Mortgage
		(In Thousands)
	Originated:
	Loan rating:
	Pass	$	1,099,108			$	554,183			$	102,927			$	295,057			$	479,811			$	44,793			$	5,528
	OAEM	11,555				372				—				49				625				—				—
	Substandard	1,087				—				—				1,078				4,817				1				4
Doubtful	—				—				—				1,500				77				—				—
Total originated	1,111,750				554,555				102,927				297,684				485,330				44,794				5,532
Acquired:
Loan rating:
Pass	332,145				69,310				10,090				96,779				27,535				—				1,509
OAEM	7,556				463				688				4,617				61				—				—
Substandard	8,645				3,605				—				8,518				98				—				14
Doubtful	1,889				—				—				194				—				—				—
Total acquired	350,235				73,378				10,778				110,108				27,694				—				1,523
Total loans	$	1,461,985			$	627,933			$	113,705			$	407,792			$	513,024			$	44,794			$	7,055
At December 31, 2013, there were no loans categorized as definite loss.
	At December 31, 2013
	Indirect Automobile
	(In Thousands)				(Percent)
Originated:
Credit score:
Over 700	$	332,140			82.9	%
661-700	54,038				13.5	%
660 and below	12,793				3.2	%
Data not available	1,560				0.4	%
Total loans	$	400,531			100	%
	At December 31, 2013
	Residential Mortgage							Home Equity
	(In Thousands)				(Percent)			(In Thousands)				(Percent)
Originated:
Loan-to-value ratio:
Less than 50%	$	94,500			17.9	%		$	75,372			29.3	%
50% - 69%	149,969				28.4	%		31,504				12.2	%
70% - 79%	139,960				26.5	%		21,161				8.2	%
80% and over	22,772				4.3	%		3,240				1.3	%
Data not available	4,353				0.8	%		1,119				0.4	%
Total originated	411,554				77.9	%		132,396				51.4	%
Acquired:
Loan-to-value ratio:
Less than 50%	23,101				4.4	%		84,272				32.7	%
50% - 69%	39,298				7.4	%		25,964				10.1	%
70% - 79%	31,932				6	%		13,390				5.2	%
80% and over	19,870				3.8	%		1,208				0.5	%
Data not available	2,430				0.5	%		231				0.1	%
Total acquired	116,631				22.1	%		125,065				48.6	%
Total loans	$	528,185			100	%		$	257,461			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 September 30, 2014 and December 31, 2013.
		At September 30, 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	$	285			$	1,131			$	32			$	1,448			$	1,311,770			$	1,313,218			$	—			$	1,063
	Multi-family mortgage	—				—				—				—				564,536				564,536				—				—
	Construction	—				—				—				—				151,199				151,199				—				—
	Total commercial real estate loans	285				1,131				32				1,448				2,027,505				2,028,953				—				1,063
	Commercial loans and leases:
	Commercial	173				42				1,160				1,375				389,537				390,912				—				1,239
	Equipment financing	2,058				1,405				1,742				5,205				555,230				560,435				—				2,737
	Condominium association	150				—				—				150				49,450				49,600				—				—
	Total commercial loans and leases	2,381				1,447				2,902				6,730				994,217				1,000,947				—				3,976
	Indirect automobile	4,136				646				113				4,895				348,368				353,263				—				474
	Consumer loans:
	Residential mortgage	974				—				502				1,476				464,833				466,309				—				1,847
	Home equity	217				130				36				383				164,153				164,536				—				58
	Other consumer	20				5				22				47				12,569				12,616				—				22
	Total consumer loans	1,211				135				560				1,906				641,555				643,461				—				1,927
	Total originated loans and leases	$	8,013			$	3,359			$	3,607			$	14,979			$	4,011,645			$	4,026,624			$	—			$	7,440
		At September 30, 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	$	2,908			$	3,936			$	1,751			$	8,595			$	288,779			$	297,374			$	1,071			$	2,111
	Multi-family mortgage	375				—				—				375				65,941				66,316				—				299
	Construction	—				—				—				—				10,080				10,080				—				—
	Total commercial real estate loans	3,283				3,936				1,751				8,970				364,800				373,770				1,071				2,410
	Commercial loans and leases:
	Commercial	742				387				3,099				4,228				100,572				104,800				780				4,832
	Equipment financing	1				—				72				73				16,033				16,106				73				19
	Total commercial loans and leases	743				387				3,171				4,301				116,605				120,906				853				4,851
	Consumer loans:
	Residential mortgage	—				604				2,521				3,125				100,694				103,819				1,995				789
	Home equity	964				263				847				2,074				108,152				110,226				—				1,807
	Other consumer	4				8				16				28				655				683				—				25
	Total consumer loans	968				875				3,384				5,227				209,501				214,728				1,995				2,621
	Total acquired loans and leases	$	4,994			$	5,198			$	8,306			$	18,498			$	690,906			$	709,404			$	3,919			$	9,882
	Total loans and leases	$	13,007			$	8,557			$	11,913			$	33,477			$	4,702,551			$	4,736,028			$	3,919			$	17,322
		At December 31, 2013
		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	$	4,896			$	1,393			$	169			$	6,458			$	1,105,292			$	1,111,750			$	—			$	169
	Multi-family mortgage	14,400				—				—				14,400				540,155				554,555				—				—
	Construction	—				—				—				—				102,927				102,927				—				—
	Total commercial real estate loans	19,296				1,393				169				20,858				1,748,374				1,769,232				—				169
Commercial loans and leases:
Commercial	2,288				75				842				3,205				294,479				297,684				—				1,551
Equipment financing	867				1,558				2,031				4,456				480,874				485,330				—				4,086
Condominium association	—				—				—				—				44,794				44,794				—				1
Total commercial loans and leases	3,155				1,633				2,873				7,661				820,147				827,808				—				5,638
Indirect automobile	5,407				857				229				6,493				394,038				400,531				10				259
Consumer loans:
Residential mortgage	201				—				415				616				410,938				411,554				—				1,713
Home equity	218				—				—				218				132,178				132,396				—				462
Other consumer	11				1				4				16				5,516				5,532				—				4
Total consumer loans	430				1				419				850				548,632				549,482				—				2,179
Total originated loans and leases	$	28,288			$	3,884			$	3,690			$	35,862			$	3,511,191			$	3,547,053			$	10			$	8,245
	At December 31, 2013
	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	$	1,221			$	87			$	4,887			$	6,195			$	344,040			$	350,235			$	3,958			$	929
Multi-family mortgage	327				—				1,052				1,379				71,999				73,378				1,052				—
Construction	—				409				—				409				10,369				10,778				—				—
Total commercial real estate loans	1,548				496				5,939				7,983				426,408				434,391				5,010				929
Commercial loans and leases:
Commercial	2,707				121				1,931				4,759				105,349				110,108				1,235				4,597
Equipment financing	46				41				73				160				27,534				27,694				73				29
Total commercial loans and leases	2,753				162				2,004				4,919				132,883				137,802				1,308				4,626
Consumer loans:
Residential mortgage	271				777				5,329				6,377				110,254				116,631				4,468				1,162
Home equity	1,259				552				895				2,706				122,359				125,065				117				1,525
Other consumer	6				11				4				21				1,502				1,523				—				14
Total consumer loans	1,536				1,340				6,228				9,104				234,115				243,219				4,585				2,701
Total acquired loans and leases	$	5,837			$	1,998			$	14,171			$	22,006			$	793,406			$	815,412			$	10,903			$	8,256
Total loan and leases	$	34,125			$	5,882			$	17,861			$	57,868			$	4,304,597			$	4,362,465			$	10,913			$	16,501
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 September 30, 2014												At December 31, 2013
		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	$	3,716			$	3,713			$	—			$	2,009			$	2,009			$	—
	Commercial	9,410				9,392				—				4,410				4,399				—
	Consumer	3,557				3,548				—				989				987				—
	Total originated with no related allowance recorded	16,683				16,653				—				7,408				7,395				—
	With an allowance recorded:
	Commercial real estate	32				32				34				1,466				1,466				184
	Commercial	1,175				1,174				531				2,393				2,383				675
	Consumer	13				13				—				2,448				2,440				323
	Total originated with an allowance recorded	1,220				1,219				565				6,307				6,289				1,182
	Total originated impaired loans and leases	17,903				17,872				565				13,715				13,684				1,182
	Acquired:
	With no related allowance recorded:
	Commercial real estate	10,092				10,116				—				9,176				10,082				—
	Commercial	7,635				7,803				—				6,988				7,248				—
	Consumer	6,663				6,663				—				1,033				1,037				—
	Total acquired with no related allowance recorded	24,390				24,582				—				17,197				18,367				—
	With an allowance recorded:
	Commercial real estate	3,160				3,450				33				1,274				1,291				122
	Commercial	760				760				203				1,020				1,067				169
	Consumer	484				484				26				—				—				—
	Total acquired with an allowance recorded	4,404				4,694				262				2,294				2,358				291
	Total acquired impaired loans and leases	28,794				29,276				262				19,491				20,725				291
	Total impaired loans and leases	$	46,697			$	47,148			$	827			$	33,206			$	34,409			$	1,473
	(1)Includes originated and acquired nonaccrual loans of $5.2 million and $9.8 million, respectively at September 30, 2014.
	(2)Includes originated and acquired nonaccrual loans of $5.8 million and $5.7 million, respectively at December 31, 2013.
		Three Months Ended
		30-Sep-14								30-Sep-13
		Average				Interest				Average				Interest
		Recorded				Income				Recorded				Income
		Investment				Recognized				Investment				Recognized
		(In Thousands)
	Originated:
	With no related allowance recorded:
	Commercial real estate	$	3,727			$	32			$	2,285			$	19
	Commercial	9,567				118				5,661				48
	Consumer	3,568				14				986				4
	Total originated with no related allowance recorded	16,862				164				8,932				71
	With an allowance recorded:
	Commercial real estate	118				—				1,131				13
	Commercial	1,239				1				1,070				3
	Consumer	14				—				3,461				22
	Total originated with an allowance recorded	1,371				1				5,662				38
	Total originated impaired loans and leases	18,233				165				14,594				109
	Acquired:
	With no related allowance recorded:
	Commercial real estate	11,652				73				9,305				36
	Commercial	8,017				36				5,790				38
	Consumer	6,629				13				1,335				4
	Total acquired with no related allowance recorded	26,298				122				16,430				78
	With an allowance recorded:
	Commercial real estate	3,164				36				3,975				42
	Commercial	760				—				1,043				—
	Consumer	538				1				—				—
	Total acquired with an allowance recorded	4,462				37				5,018				42
	Total acquired impaired loans and leases	30,760				159				21,448				120
Total impaired loans and leases	$	48,993			$	324			$	36,042			$	229
	Nine Months Ended
	30-Sep-14								30-Sep-13
	Average				Interest				Average				Interest
	Recorded				Income				Recorded				Income
	Investment				Recognized				Investment				Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	2,857			$	80			$	2,200			$	69
Commercial	6,386				188				4,031				109
Consumer	2,509				27				1,108				26
Total originated with no related allowance recorded	11,752				295				7,339				204
With an allowance recorded:
Commercial real estate	1,097				22				1,516				26
Commercial	2,898				49				1,810				14
Consumer	1,298				15				3,317				82
Total originated with an allowance recorded	5,293				86				6,643				122
Total originated impaired loans and leases	17,045				381				13,982				326
Acquired:
With no related allowance recorded:
Commercial real estate	13,211				301				9,783				178
Commercial	7,671				95				4,800				93
Consumer	6,569				23				1,379				17
Total acquired with no related allowance recorded	27,451				419				15,962				288
With an allowance recorded:
Commercial real estate	3,035				76				2,776				42
Commercial	1,085				15				385				—
Consumer	436				2				—				—
Total acquired with an allowance recorded	4,556				93				3,161				42
Total acquired impaired loans and leases	32,007				512				19,123				330
Total impaired loans and leases	$	49,052			$	893			$	33,105			$	656
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 September 30, 2014
		Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated				Total
		(In Thousands)
	Allowance for Loan and Lease Losses:
	Originated:
	Individually evaluated for impairment	$	34			$	531			$	—			$	—			$	—			$	565
	Collectively evaluated for impairment	28,344				13,187				3,461				2,909				2,423				50,324
	Total originated loans and leases	28,378				13,718				3,461				2,909				2,423				50,889
	Acquired:
	Individually evaluated for impairment	—				123				—				26				—				149
	Collectively evaluated for impairment	145				(103		)		—				2				—				44
	Acquired with deteriorated credit quality	897				211				—				632				—				1,740
	Total acquired loans and leases	1,042				231				—				660				—				1,933
	Total allowance for loan and lease losses	$	29,420			$	13,949			$	3,461			$	3,569			$	2,423			$	52,822
	Loans and Leases:
	Originated:
	Individually evaluated for impairment	$	3,749			$	10,585			$	—			$	3,569			$	—			$	17,903
	Collectively evaluated for impairment	2,025,204				990,362				353,263				639,892				—				4,008,721
	Total originated loans and leases	2,028,953				1,000,947				353,263				643,461				—				4,026,624
	Acquired:
	Individually evaluated for impairment	1,131				4,581				—				2,558				—				8,270
	Collectively evaluated for impairment	121,285				87,850				—				141,328				—				350,463
	Acquired with deteriorated credit quality	251,354				28,475				—				70,842				—				350,671
	Total acquired loans and leases	373,770				120,906				—				214,728				—				709,404
	Total loans and leases	$	2,402,723			$	1,121,853			$	353,263			$	858,189			$	—			$	4,736,028
		At December 31, 2013
		Commercial Real Estate				Commercial				Indirect Automobile				Consumer				Unallocated				Total
		(In Thousands)
	Allowance for Loan and Lease Losses:
	Originated:
	Individually evaluated for impairment	$	184			$	675			$	—			$	323			$	—			$	1,182
	Collectively evaluated for impairment	22,336				14,056				3,924				2,414				2,932				45,662
	Total originated loans and leases	22,520				14,731				3,924				2,737				2,932				46,844
	Acquired:
	Individually evaluated for impairment	—				3				—				—				—				3
	Collectively evaluated for impairment	(54		)		234				—				204				—				384
	Acquired with deteriorated credit quality	556				252				—				434				—				1,242
	Total acquired loans and leases	502				489				—				638				—				1,629
	Total allowance for loan and lease losses	$	23,022			$	15,220			$	3,924			$	3,375			$	2,932			$	48,473
	Loans and Leases:
	Originated:
	Individually evaluated for impairment	$	3,643			$	6,634			$	—			$	3,438			$	—			$	13,715
	Collectively evaluated for impairment	1,765,589				821,174				400,531				546,044				—				3,533,338
	Total originated loans and leases	1,769,232				827,808				400,531				549,482				—				3,547,053
	Acquired:
	Individually evaluated for impairment	2,625				4,878				—				872				—				8,375
	Collectively evaluated for impairment	145,057				93,565				—				162,595				—				401,217
	Acquired with deteriorated credit quality	286,709				39,359				—				79,752				—				405,820
	Total acquired loans and leases	434,391				137,802				—				243,219				—				815,412
	Total loans and leases	$	2,203,623			$	965,610			$	400,531			$	792,701			$	—			$	4,362,465
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 September 30, 2014
		Recorded Investment											Specific								Defaulted
		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	1			$	1,970			$	1,970			$	—			$	—			$	—			—			—
	Equipment financing	5			696				699				18				191				—				—			—
	Total Originated	6			2,666				2,669				18				191				—				—			—
	Acquired:
	Commercial	4			851				924				—				45				—				1			1,335
	Total Acquired	4			851				924				—				45				—				1			1,335
	Total	10			$	3,517			$	3,593			$	18			$	236			$	—			1			$	1,335
		At and for the Three Months Ended September 30, 2013
		Recorded Investment											Specific								Defaulted
		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	—			$	—			$	—			$	—			$	—			$	—			1			$	1,731
	Equipment financing	1			558				558				12				—				—				1			537
	Total Originated	1			558				558				12				—				—				2			2,268
	Acquired:
	Commercial real estate mortgage	1			737				737				—				—				—				—			—
	Commercial	2			553				520				—				—				—				1			962
	Total Acquired	3			1,290				1,257				—				—				—				1			962
	Total	4			$	1,848			$	1,815			$	12			$	—			$	—			3			$	3,230
		At and for the Nine Months Ended September 30, 2014
		Recorded Investment											Specific								Defaulted
		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			$	939			$	—			$	—			$	—			—			$	—
	Commercial	3			2,360				2,336				—				16				—				—			—
	Equipment financing	7			1,369				1,352				18				191				—				6			1,074
	Residential mortgage	1			497				491				—				491				—				1			491
	Home equity	1			292				292				—				—				—				—			—
	Total Originated	13			5,471				5,410				18				698				—				7			1,565
	Acquired:
	Commercial	6			1,104				1,152				—				273				—				4			1,607
	Total Acquired	6			1,104				1,152				—				273				—				4			1,607
	Total	19			$	6,575			$	6,562			$	18			$	971			$	—			11			$	3,172
		At and for the Nine Months Ended September 30, 2013
		Recorded Investment											Specific								Defaulted
		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			$	1,039			$	—			$	—			$	—			$	—			—			$	—
	Commercial	—			—				—				—				—				—				1			1,731
	Equipment financing	9			1,683				1,687				54				372				—				1			537
	Residential mortgage	1			415				372				—				—				—				—			—
	Total Originated	11			3,137				2,059				54				372				—				2			2,268
	Acquired:
	Commercial real estate mortgage	1			737				737				—				—				—				—			—
	Commercial	3			977				941				—				421				—				1			962
	Total Acquired	4			1,714				1,678				—				421				—				1			962
Total	15			$	4,851			$	3,737			$	54			$	793			$	—			3			$	3,230
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 September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
		(In Thousands)
	Loans with one modification:
	Extended maturity	$	2,849			$	1,257			$	3,427			$	1,257
	Adjusted principal	—				—				—				372
	Adjusted interest rate	—				558				866				1,351
	Interest only	—				—				16				—
	Combination maturity, principal, interest rate	200				—				200				757
	Total loans with one modification	$	3,049			$	1,815			$	4,509			$	3,737
	Loans with more than one modification:
	Extended maturity	$	36			$	—			$	1,253			$	—
	Adjusted principal	508				—				508				—
	Interest only	—				—				292				—
	Total loans with more than one modification	$	544			$	—			$	2,053			$	—

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of composition of goodwill and other intangible assets	'
	The following table sets forth the composition of goodwill and other intangible assets at the dates indicated:
		At September 30, 2014		At December 31, 2013
		(In Thousands)
	Goodwill	$	137,890	$	137,890
	Other intangible assets:
	Core deposits	13,282		15,777
	Trade name	1,089		1,089
	Trust relationship	—		21
	Total other intangible assets	14,371		16,887
	Total goodwill and other intangible assets	$	152,261	$	154,777
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 September 30, 2014 is as follows:
	Remainder of 2014	$	608
	Year ending:
	2015	2,868
	2016	2,457
	2017	1,858
	2018	1,836
	Thereafter	3,655
	Total	$	13,282

Borrowed_Funds_Tables

Borrowed Funds (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of subordinated debentures	'
	The following table summarizes the Company's subordinated debentures and notes at the dates indicated.
					Carrying Amount at September 30, 2014		Carrying Amount at December 31, 2013
	Issue Date	Rate	Maturity Date	Next Call Date
	(Dollars in Thousands)
	June 26, 2003	Variable; 3-month LIBOR + 3.10%	June 26, 2033	December 26, 2014	$	4,688	$	4,666
	March 17, 2004	Variable; 3-month LIBOR + 2.79%	March 17, 2034	December 17, 2014	$	4,532	$	4,497
	15-Sep-14	6.0% Fixed-to-Variable; 3-month LIBOR + 3.315%	15-Sep-29	15-Sep-24	$	73,543	$	—

Comprehensive_IncomeLoss_Table

Comprehensive Income/(Loss) (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at June 30, 2014	$	(3,574	)	$	365		$	(3,209	)
	Other comprehensive loss	(1,407		)	(65		)	(1,472		)
	Balance at September 30, 2014	$	(4,981	)	$	300		$	(4,681	)
		Three Months Ended September 30, 2013
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at June 30, 2013	$	(4,572	)	$	131		$	(4,441	)
	Other comprehensive loss	(459		)	—			(459		)
	Balance at September 30, 2013	$	(5,031	)	$	131		$	(4,900	)
		Nine Months Ended September 30, 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)	3,351			(117		)	3,234
	Balance at September 30, 2014	$	(4,981	)	$	300		$	(4,681	)
		Nine Months Ended September 30, 2013
		Investment			Postretirement			Accumulated Other
		Securities			Benefits			Comprehensive
		Available-for-Sale						Income
		(In Thousands)
	Balance at December 31, 2012	$	3,358		$	125		$	3,483
	Other comprehensive (loss) income	(8,389		)	6			(8,383		)
	Balance at September 30, 2013	$	(5,031	)	$	131		$	(4,900	)
Schedule of amounts reclassified from accumulated other comprehensive income (loss)	'
	The following is a summary of the amounts reclassified from accumulated other comprehensive income (loss) for the nine months ended September 30, 2014.
		Nine Months Ended			Income Statement Line Affected by Reclassification
		September 30, 2014
		(In Thousands)
	Other comprehensive income (loss) component
	Unrealized gains (losses) on investment securities available-for-sale	$	(13	)	Loss on sales of securities, net
		5			Provision for income taxes
	Total reclassifications for the period	$	(8	)	Net income

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2014
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 consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments at September 30, 2014 and December 31, 2013.
		At September 30, 2014				At December 31, 2013
		Asset		Liability		Asset		Liability
		Derivatives		Derivatives		Derivatives		Derivatives
		(In Thousands)
	Total derivatives (interest-rate products) not designated as hedging instruments	$	1,310	$	1,303	$	825	$	856
	Changes in the fair value are recognized directly in the Company's unaudited consolidated statements of income and are included in loan fees 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 and nine months ended September 30, 2014 and September 30, 2013.
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(In Thousands)
	Gain (loss) recognized in income on derivatives	$	32	$	1	$	38	$	(24	)
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 September 30, 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	$	1,310	$	—	$	1,310	$	—		$	—	$	1,310
	Liability Derivatives	$	1,303	$	—	$	1,303	$	—		$	3,628	$	4,931
		At December 31, 2013
		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	$	825	$	—	$	825	$	—		$	—	$	825
	Liability Derivatives	$	856	$	—	$	856	$	—		$	2,811	$	3,667

Earnings_per_Share_Tables

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2014
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
		30-Sep-14				30-Sep-13
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	11,581	$	11,581	$	9,429	$	9,429
	Denominator:
	Weighted average shares outstanding	69,989,909		69,989,909		69,830,953		69,830,953
	Effect of dilutive securities	—		99,078		—		82,812
	Adjusted weighted average shares outstanding	69,989,909		70,088,987		69,830,953		69,913,765
	EPS	$	0.17	$	0.17	$	0.14	$	0.13
		Nine Months Ended
		30-Sep-14				30-Sep-13
		Basic		Fully		Basic		Fully
				Diluted				Diluted
		(In Thousands Except Share Data)
	Numerator:
	Net income	$	31,979	$	31,979	$	27,732	$	27,732
	Denominator:
	Weighted average shares outstanding	69,918,248		69,918,248		69,789,737		69,789,737
	Effect of dilutive securities	—		111,135		—		70,985
	Adjusted weighted average shares outstanding	69,918,248		70,029,383		69,789,737		69,860,722
	EPS	$	0.46	$	0.46	$	0.4	$	0.4

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014
		Level 1		Level 2			Level 3			Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	GSEs	$	—	$	15,790		$	—		$	15,790
	GSE CMOs	—		237,228			—			237,228
	GSE MBSs	—		231,512			—			231,512
	SBA commercial loan asset-backed securities	—		210			—			210
	Corporate debt obligations	—		40,099			—			40,099
	Trust preferred securities	—		1,305			—			1,305
	Marketable equity securities	1,372		—			—			1,372
	Total investment securities available-for-sale	$	1,372	$	526,144		$	—		$	527,516
	Interest-rate swaps	$	—	$	1,310		$	—		$	1,310
	Liabilities:
	Interest-rate swaps	$	—	$	1,303		$	—		$	1,303
		Carrying Value at December 31, 2013
		Level 1		Level 2			Level 3			Total
		(In Thousands)
	Assets:
	Investment securities available-for-sale:
	GSEs	$	—	$	12,180		$	—		$	12,180
	GSE CMOs	—		243,644			—			243,644
	GSE MBSs	—		199,401			—			199,401
	Private-label CMOs	—		3,355			—			3,355
	SBA commercial loan asset-backed securities	—		243			—			243
	Auction-rate municipal obligations	—		—			1,775			1,775
	Municipal obligations	—		1,086			—			1,086
	Corporate debt obligations	—		28,224			—			28,224
	Trust preferred securities	—		1,210			—			1,210
	Marketable equity securities	1,310		—			—			1,310
	Total investment securities available-for-sale	$	1,310	$	489,343		$	1,775		$	492,428
	Interest-rate swaps	$	—	$	825		$	—		$	825
	Liabilities:
	Interest-rate swaps	$	—	$	856		$	—		$	856
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 September 30,					Nine Months Ended September 30,
		2014		2013			2014			2013
		(In Thousands)
	Investment securities available-for-sale, beginning of period	$	—	$	2,835		$	1,775		$	2,917
	Investment security sales	—		—			(1,658		)	—
	Principal paydowns and other	—		(10		)	—			(341		)
	Total realized losses included in other income	—		—			(242		)	—
	Total unrealized losses included in other comprehensive income	—		30			125			279
	Investment securities available-for-sale, end of period	$	—	$	2,855		$	—		$	2,855
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 September 30, 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	$	—	$	—		$	6,358		$	6,358
	Other real estate owned	—		—			1,536			1,536
	Repossessed vehicles and equipment	—		927			—			927
	Total assets measured at fair value on a non-recurring basis	$	—	$	927		$	7,894		$	8,821
		Carrying Value at December 31, 2013
		Level 1		Level 2			Level 3			Total
		(In Thousands)
	Assets measured at fair value on a non-recurring basis:
	Collateral-dependent impaired loans and leases	$	—	$	—		$	12,099		$	12,099
	Other real estate owned	—		—			577			577
	Repossessed vehicles and equipment	—		1,001			—			1,001
	Total assets measured at fair value on a non-recurring basis	$	—	$	1,001		$	12,676		$	13,677
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		Unobservable Input	Range		Weighted Average
												Discount Rates
		At September 30, 2014		At December 31, 2013
		(Dollars in Thousands)
	Auction-rate municipal obligations	$	—	$	1,775		Discounted cash flow		Discount rate	0-5%		4.00%
	Collateral-dependent impaired loans and leases	$	6,358	$	12,099		Appraisal of collateral (1)
	Other real estate owned	$	1,536	$	577		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 September 30, 2014
	Financial assets:
	Investment securities held-to-maturity	$	500	$	500		$	—		$	—		$	500
	Loans held-for-sale	464		464			—			464			—
	Loans and leases, net	4,683,206		4,783,157			—			—			4,783,157
	Financial liabilities:
	Certificates of deposit	907,432		910,634			—			910,634			—
	Borrowed funds	1,132,865		1,140,450			—			1,140,450			—
	At December 31, 2013
	Financial assets:
	Investment securities held-to-maturity	$	500	$	500		$	—		$	—		$	500
	Loans held-for-sale	13,372		13,372			—			13,372			—
	Loans and leases, net	4,313,992		4,552,556			—			—			4,552,556
	Financial liabilities:
	Certificates of deposit	934,668		938,703			—			938,703			—
	Borrowed funds	812,555		815,910			—			815,910			—

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014		At December 31, 2013
		(In Thousands)
	Financial instruments whose contract amounts represent credit risk:
	Commitments to originate loans and leases:
	Commercial real estate	$	45,655	$	48,973
	Commercial	112,079		143,252
	Residential mortgage	15,792		8,027
	Unadvanced portion of loans and leases	610,087		586,279
	Unused lines of credit:
	Home equity	234,180		205,665
	Other consumer	11,100		6,503
	Other commercial	1,081		1,035
	Unused letters of credit:
	Financial standby letters of credit	18,257		20,410
	Performance standby letters of credit	3,116		2,989
	Commercial and similar letters of credit	2,057		440
	Back-to-back interest-rate swaps	65,746		22,418
Schedule of future minimum rental payments under noncancellable operating leases	'
	The Company leases certain office space under various 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 2014	1,360
	Year ending:
	2015	5,529
	2016	5,390
	2017	4,860
	2018	4,285
	Thereafter	15,606
	Total	$	37,030

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
	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 $)	Sep. 30, 2014	Dec. 31, 2013
Investment securities available-for-sale	'	'
Amortized Cost	$535,578,000	$505,889,000
Gross Unrealized Gains	2,561,000	2,680,000
Gross Unrealized Losses	10,623,000	16,141,000
Estimated fair value	527,516,000	492,428,000
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	527,516,000	492,428,000
Net unrealized gain (loss)	-8,100,000	-13,500,000
Gross unrealized losses, fair value	406,291,000	383,263,000
Percentage of securities in unrealized loss positions	77.00%	77.80%
Available for sale securities pledged as collateral	446,700,000	402,500,000
Debt securities	'	'
Investment securities available-for-sale	'	'
Amortized Cost	534,312,000	504,630,000
Gross Unrealized Gains	2,453,000	2,619,000
Gross Unrealized Losses	10,621,000	16,131,000
Estimated fair value	526,144,000	491,118,000
Investment securities held-to-maturity	'	'
Estimated fair value	526,144,000	491,118,000
Gross unrealized losses, fair value	405,781,000	382,762,000
GSEs	'	'
Investment securities available-for-sale	'	'
Amortized Cost	15,839,000	12,138,000
Gross Unrealized Gains	3,000	42,000
Gross Unrealized Losses	52,000	0
Estimated fair value	15,790,000	12,180,000
Investment securities held-to-maturity	'	'
Estimated fair value	15,790,000	12,180,000
Gross unrealized losses, fair value	10,767,000	'
GSE CMOs	'	'
Investment securities available-for-sale	'	'
Amortized Cost	245,380,000	254,331,000
Gross Unrealized Gains	108,000	86,000
Gross Unrealized Losses	8,260,000	10,773,000
Estimated fair value	237,228,000	243,644,000
Investment securities held-to-maturity	'	'
Estimated fair value	237,228,000	243,644,000
GSE MBSs	'	'
Investment securities available-for-sale	'	'
Amortized Cost	231,636,000	202,478,000
Gross Unrealized Gains	1,971,000	1,852,000
Gross Unrealized Losses	2,095,000	4,929,000
Estimated fair value	231,512,000	199,401,000
Investment securities held-to-maturity	'	'
Estimated fair value	231,512,000	199,401,000
Private-label CMOs	'	'
Investment securities available-for-sale	'	'
Amortized Cost	'	3,258,000
Gross Unrealized Gains	'	115,000
Gross Unrealized Losses	'	18,000
Estimated fair value	'	3,355,000
Investment securities held-to-maturity	'	'
Estimated fair value	'	3,355,000
Net unrealized gain (loss)	'	100,000
Gross unrealized losses, fair value	'	639,000
SBA commercial loan asset-backed securities	'	'
Investment securities available-for-sale	'	'
Amortized Cost	212,000	245,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,000	2,000
Estimated fair value	210,000	243,000
Investment securities held-to-maturity	'	'
Estimated fair value	210,000	243,000
Gross unrealized losses, fair value	200,000	224,000
Auction-rate municipal obligations	'	'
Investment securities available-for-sale	'	'
Amortized Cost	'	1,900,000
Gross Unrealized Gains	'	0
Gross Unrealized Losses	'	125,000
Estimated fair value	'	1,775,000
Investment securities held-to-maturity	'	'
Estimated fair value	'	1,775,000
Net unrealized gain (loss)	'	-100,000
Gross unrealized losses, fair value	'	1,775,000
Municipal obligations	'	'
Investment securities available-for-sale	'	'
Amortized Cost	'	1,068,000
Gross Unrealized Gains	'	18,000
Gross Unrealized Losses	'	0
Estimated fair value	'	1,086,000
Investment securities held-to-maturity	'	'
Estimated fair value	'	1,086,000
Corporate debt obligations	'	'
Investment securities available-for-sale	'	'
Amortized Cost	39,782,000	27,751,000
Gross Unrealized Gains	371,000	506,000
Gross Unrealized Losses	54,000	33,000
Estimated fair value	40,099,000	28,224,000
Investment securities held-to-maturity	'	'
Estimated fair value	40,099,000	28,224,000
Net unrealized gain (loss)	300,000	500,000
Gross unrealized losses, fair value	14,962,000	5,988,000
Trust preferred securities and pools	'	'
Investment securities available-for-sale	'	'
Amortized Cost	1,463,000	1,461,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	158,000	251,000
Estimated fair value	1,305,000	1,210,000
Investment securities held-to-maturity	'	'
Estimated fair value	1,305,000	1,210,000
Net unrealized gain (loss)	-200,000	-300,000
Gross unrealized losses, fair value	1,305,000	1,210,000
Marketable equity securities	'	'
Investment securities available-for-sale	'	'
Amortized Cost	1,266,000	1,259,000
Gross Unrealized Gains	108,000	61,000
Gross Unrealized Losses	2,000	10,000
Estimated fair value	1,372,000	1,310,000
Investment securities held-to-maturity	'	'
Estimated fair value	1,372,000	1,310,000
Net unrealized gain (loss)	100,000	100,000
Gross unrealized losses, fair value	$510,000	$501,000

Investment_Securities_Details_

Investment Securities (Details 2) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Less than 12 months	'	'
Estimated Fair Value	$129,688	$350,313
Unrealized Losses	1,677	13,668
12 months or Longer	'	'
Estimated Fair Value	276,603	32,950
Unrealized Losses	8,946	2,473
Total	'	'
Estimated Fair Value	406,291	383,263
Unrealized Losses	10,623	16,141
Debt securities	'	'
Less than 12 months	'	'
Estimated Fair Value	129,178	349,812
Unrealized Losses	1,675	13,658
12 months or Longer	'	'
Estimated Fair Value	276,603	32,950
Unrealized Losses	8,946	2,473
Total	'	'
Estimated Fair Value	405,781	382,762
Unrealized Losses	10,621	16,131
GSE	'	'
Less than 12 months	'	'
Estimated Fair Value	10,767	'
Unrealized Losses	52	'
12 months or Longer	'	'
Estimated Fair Value	0	'
Unrealized Losses	0	'
Total	'	'
Estimated Fair Value	10,767	'
Unrealized Losses	52	'
GSE CMOs	'	'
Less than 12 months	'	'
Estimated Fair Value	43,509	221,317
Unrealized Losses	1,361	9,861
12 months or Longer	'	'
Estimated Fair Value	188,640	16,257
Unrealized Losses	6,899	912
Total	'	'
Estimated Fair Value	232,149	237,574
Unrealized Losses	8,260	10,773
GSE MBS	'	'
Less than 12 months	'	'
Estimated Fair Value	59,932	121,836
Unrealized Losses	208	3,746
12 months or Longer	'	'
Estimated Fair Value	86,466	13,516
Unrealized Losses	1,887	1,183
Total	'	'
Estimated Fair Value	146,398	135,352
Unrealized Losses	2,095	4,929
Private-label CMOs	'	'
Less than 12 months	'	'
Estimated Fair Value	'	639
Unrealized Losses	'	18
12 months or Longer	'	'
Estimated Fair Value	'	0
Unrealized Losses	'	0
Total	'	'
Estimated Fair Value	'	639
Unrealized Losses	'	18
SBA commercial loan asset-backed securities	'	'
Less than 12 months	'	'
Estimated Fair Value	8	32
Unrealized Losses	0	0
12 months or Longer	'	'
Estimated Fair Value	192	192
Unrealized Losses	2	2
Total	'	'
Estimated Fair Value	200	224
Unrealized Losses	2	2
Auction-rate municipal obligations	'	'
Less than 12 months	'	'
Estimated Fair Value	'	0
Unrealized Losses	'	0
12 months or Longer	'	'
Estimated Fair Value	'	1,775
Unrealized Losses	'	125
Total	'	'
Estimated Fair Value	'	1,775
Unrealized Losses	'	125
Corporate debt obligations	'	'
Less than 12 months	'	'
Estimated Fair Value	14,962	5,988
Unrealized Losses	54	33
12 months or Longer	'	'
Estimated Fair Value	0	0
Unrealized Losses	0	0
Total	'	'
Estimated Fair Value	14,962	5,988
Unrealized Losses	54	33
Trust preferred securities and pools	'	'
Less than 12 months	'	'
Estimated Fair Value	0	0
Unrealized Losses	0	0
12 months or Longer	'	'
Estimated Fair Value	1,305	1,210
Unrealized Losses	158	251
Total	'	'
Estimated Fair Value	1,305	1,210
Unrealized Losses	158	251
Marketable equity securities	'	'
Less than 12 months	'	'
Estimated Fair Value	510	501
Unrealized Losses	2	10
12 months or Longer	'	'
Estimated Fair Value	0	0
Unrealized Losses	0	0
Total	'	'
Estimated Fair Value	510	501
Unrealized Losses	$2	$10

Investment_Securities_Details_1

Investment Securities (Details 3) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

U.S. Government-Sponsored Enterprises excluding GNMA MBSs and CMOs, and SBA commercial loan asset-backed securities

U.S. Government-Sponsored Enterprises excluding GNMA MBSs and CMOs, and SBA commercial loan asset-backed securities

GSEs

GSEs

GSEs

GSE mortgage-related securities

GSE mortgage-related securities

GSE mortgage-related securities

SBA commercial loan asset-backed securities

SBA commercial loan asset-backed securities

Private-label CMOs

Auction-rate municipal obligations

Auction-rate municipal obligations

Municipal obligations

Municipal obligations

Corporate debt obligations

Corporate debt obligations

Corporate debt obligations

Trust preferred securities and pools:

Trust preferred securities and pools:

Marketable equity securities

Marketable equity securities

security

security

security

security

security

security

security

issuer

security

issuer

security

security

security

security

security

security

Additional disclosures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value

$527,516,000

'

$492,428,000

$24,200,000

$18,900,000

$15,790,000

'

$12,180,000

$468,700,000

'

$443,000,000

$210,000

$243,000

$3,355,000

'

$1,775,000

'

$1,086,000

$40,099,000

'

$28,224,000

$1,210,000

$1,305,000

$1,372,000

$1,310,000

Net unrealized gain (loss)

-8,100,000

'

-13,500,000

'

'

'

'

'

-8,300,000

'

-13,800,000

'

'

100,000

'

-100,000

'

'

300,000

'

500,000

-300,000

-200,000

100,000

100,000

Number of trust preferred securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

Number of securities under unrealized loss position

'

'

'

'

'

4

'

0

106

'

86

7

7

2

'

'

0

'

4

'

2

2

2

1

1

Number of securities

'

'

'

'

'

8

'

5

244

'

232

8

9

11

'

'

'

'

13

'

11

'

2

4

4

Purchases of investment securities available-for-sale

$96,932,000

$124,106,000

'

'

'

$8,900,000

$0

'

$76,100,000

$111,400,000

'

'

'

'

'

'

'

'

$12,000,000

$12,700,000

'

'

'

'

'

Number of issuers defaulting on scheduled payments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

0

'

'

'

'

'

'

Investment_Securities_Details_2

Investment Securities (Details 4) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
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 $)	Sep. 30, 2014	Dec. 31, 2013
Available for Sale, Amortized Cost	'	'
Within 1 year	$8,168,000	$13,012,000
After 1 year through 5 years	49,866,000	40,204,000
After 5 years through 10 years	96,209,000	66,447,000
Over 10 years	380,069,000	384,967,000
Total	534,312,000	504,630,000
Available for Sale, Estimated Fair Value	'	'
Within 1 year	8,210,000	13,062,000
After 1 year through 5 years	50,779,000	41,187,000
After 5 years through 10 years	96,645,000	67,075,000
Over 10 years	370,510,000	369,794,000
Total	526,144,000	491,118,000
Available for Sale, Weighted Average Rate	'	'
Within 1 year (as a percent)	1.59%	0.82%
After 1 year through 5 years (as a percent)	2.61%	2.90%
After 5 years through 10 years (as a percent)	1.99%	2.23%
Over 10 years (as a percent)	1.93%	1.90%
Total (as a percent)	2.00%	2.00%
Held-to-maturity, Amortized Cost	'	'
Within 1 year	0	500,000
After 1 year through 5 years	500,000	0
Total	500,000	500,000
Held-to-maturity, Estimated Fair Value	'	'
Within 1 year	0	500,000
After 1 year through 5 years	500,000	0
Total	500,000	500,000
Held-to-maturity, Weighted Average Rate	'	'
Within 1 year (as a percent)	0.00%	1.99%
After 1 year through 5 years (as a percent)	1.30%	0.00%
Total (as a percent)	1.30%	1.99%
Estimated fair value of debt securities have right to call or prepay the obligations	3,900,000	3,700,000
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of less than one year	'	700,000
Estimated fair value of debt securities have right to call or prepay the obligations, schedule maturities of one to five years	2,000,000	'
Estimated fair value of debt securities have right to call or prepay the obligations, schedule maturities of six to ten years	1,900,000	'
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities after ten years	'	$3,000,000

Investment_Securities_Details_4

Investment Securities (Details 6) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Sales of debt securities	$5,083	$0
Debt securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Sales of debt securities	5,083	'
Gross gains from sales	302	'
Gross losses from sales	315	'
Loss on sales of securities, net	($13)	'

Loans_and_Leases_Details

Loans and Leases (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	$4,026,624	$3,547,053
Originated, Weighted Average Coupon (as a percent)	4.45%	4.59%
Acquired loans	709,404	815,412
Acquired, Weighted Average Coupon (as a percent)	4.26%	4.38%
Total	4,736,028	4,362,465
Total, Weighted Average Coupon (as a percent)	4.42%	4.55%
Percentage of loans to aggregate outstanding amount in the greater New York/New Jersey metropolitan area	36.60%	38.20%
Percentage of loans to aggregate outstanding amount in Other areas of the United States	63.40%	61.80%
Commercial real estate loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	2,028,953	1,769,232
Originated, Weighted Average Coupon (as a percent)	4.17%	4.26%
Acquired loans	373,770	434,391
Acquired, Weighted Average Coupon (as a percent)	4.38%	4.46%
Total	2,402,723	2,203,623
Total, Weighted Average Coupon (as a percent)	4.20%	4.30%
Commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	1,313,218	1,111,750
Originated, Weighted Average Coupon (as a percent)	4.23%	4.34%
Acquired loans	297,374	350,235
Acquired, Weighted Average Coupon (as a percent)	4.35%	4.42%
Total	1,610,592	1,461,985
Total, Weighted Average Coupon (as a percent)	4.25%	4.36%
Multi-family mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	564,536	554,555
Originated, Weighted Average Coupon (as a percent)	4.13%	4.19%
Acquired loans	66,316	73,378
Acquired, Weighted Average Coupon (as a percent)	4.51%	4.63%
Total	630,852	627,933
Total, Weighted Average Coupon (as a percent)	4.17%	4.24%
Construction loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	151,199	102,927
Originated, Weighted Average Coupon (as a percent)	3.82%	3.81%
Acquired loans	10,080	10,778
Acquired, Weighted Average Coupon (as a percent)	4.45%	4.37%
Total	161,279	113,705
Total, Weighted Average Coupon (as a percent)	3.85%	3.87%
Commercial loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	1,000,947	827,808
Originated, Weighted Average Coupon (as a percent)	5.57%	5.77%
Acquired loans	120,906	137,802
Acquired, Weighted Average Coupon (as a percent)	4.56%	4.95%
Total	1,121,853	965,610
Total, Weighted Average Coupon (as a percent)	5.46%	5.65%
Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	390,912	297,684
Originated, Weighted Average Coupon (as a percent)	3.71%	3.68%
Acquired loans	104,800	110,108
Acquired, Weighted Average Coupon (as a percent)	4.29%	4.54%
Total	495,712	407,792
Total, Weighted Average Coupon (as a percent)	3.83%	3.91%
Equipment financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	560,435	485,330
Originated, Weighted Average Coupon (as a percent)	6.95%	7.14%
Acquired loans	16,106	27,694
Acquired, Weighted Average Coupon (as a percent)	6.29%	6.60%
Total	576,541	513,024
Total, Weighted Average Coupon (as a percent)	6.93%	7.11%
Condominium association	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	49,600	44,794
Originated, Weighted Average Coupon (as a percent)	4.64%	4.74%
Acquired loans	0	0
Acquired, Weighted Average Coupon (as a percent)	0.00%	0.00%
Total	49,600	44,794
Total, Weighted Average Coupon (as a percent)	4.64%	4.74%
Indirect automobile	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	353,263	400,531
Originated, Weighted Average Coupon (as a percent)	4.54%	4.98%
Acquired loans	0	0
Acquired, Weighted Average Coupon (as a percent)	0.00%	0.00%
Total	353,263	400,531
Total, Weighted Average Coupon (as a percent)	4.54%	4.98%
Consumer loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	643,461	549,482
Originated, Weighted Average Coupon (as a percent)	3.57%	3.61%
Acquired loans	214,728	243,219
Acquired, Weighted Average Coupon (as a percent)	3.88%	3.98%
Total	858,189	792,701
Total, Weighted Average Coupon (as a percent)	3.65%	3.72%
Residential mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	466,309	411,554
Originated, Weighted Average Coupon (as a percent)	3.61%	3.65%
Acquired loans	103,819	116,631
Acquired, Weighted Average Coupon (as a percent)	3.83%	3.93%
Total	570,128	528,185
Total, Weighted Average Coupon (as a percent)	3.65%	3.71%
Home equity	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	164,536	132,396
Originated, Weighted Average Coupon (as a percent)	3.37%	3.39%
Acquired loans	110,226	125,065
Acquired, Weighted Average Coupon (as a percent)	3.85%	3.88%
Total	274,762	257,461
Total, Weighted Average Coupon (as a percent)	3.56%	3.63%
Other consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Originated loans	12,616	5,532
Originated, Weighted Average Coupon (as a percent)	4.74%	5.98%
Acquired loans	683	1,523
Acquired, Weighted Average Coupon (as a percent)	14.97%	14.89%
Total	$13,299	$7,055
Total, Weighted Average Coupon (as a percent)	5.27%	7.90%

Loans_and_Leases_Details_2

Loans and Leases (Details 2) (Acquired, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Acquired	'	'	'	'	'
Summarized activity in accretable yield for the acquired loan portfolio	'	'	'	'	'
Balance at beginning of period	$38,178,000	$52,182,000	$45,789,000	$57,812,000	'
Reclassification from nonaccretable difference for loans with improved cash flows	2,141,000	1,537,000	3,795,000	6,913,000	'
Accretion	-3,806,000	-5,029,000	-13,071,000	-16,035,000	'
Balance at end of period	36,513,000	48,690,000	36,513,000	48,690,000	'
Aggregate remaining nonaccretable difference (representing both principal and interest) applicable to acquired loans	$2,300,000	'	$2,300,000	'	$6,100,000

Loans_and_Leases_Details_3

Loans and Leases (Details 3) (Directors, executive officers and their affiliates, USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Directors, executive officers and their affiliates	'	'	'
Loans and Leases Receivable, Related Parties [Roll Forward]	'	'	'
Balance at beginning of period	$16,110,000	$4,083,000	'
New loans granted during the period	1,726,000	498,000	'
Advances on lines of credit	1,803,000	6,163,000	'
Repayments	-9,803,000	-887,000	'
Loans no longer classified as related party loans	-1,016,000	10,753,000	'
Balance at end of period	8,820,000	20,610,000	'
Unfunded commitments on extensions of credit to insiders	$14,600,000	'	$11,700,000

Loans_and_Leases_Details_4

Loans and Leases (Details 4) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Receivables [Abstract]	'	'
Loans and leases pledged as collateral	$1.70	$1.20

Allowance_for_Loan_and_Lease_L2

Allowance for Loan and Lease Losses (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	$51,686,000	$44,281,000	$48,473,000	$41,152,000	'
Charge-offs	-1,136,000	-903,000	-3,382,000	-2,594,000	'
Recoveries	343,000	282,000	1,203,000	915,000	'
Provision (credit) for loan and lease losses	1,929,000	2,730,000	6,528,000	6,917,000	'
Balance at the end of the period	52,822,000	46,390,000	52,822,000	46,390,000	'
Unfunded credit commitments liability included in other liabilities	1,300,000	900,000	1,300,000	900,000	1,000,000
Increase (decrease) in liability for unfunded credit commitment	'	'	300,000	100,000	'
Unfunded credit commitments liability charged off	'	'	0	0	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	1,929,000	2,730,000	6,528,000	6,917,000	'
Unfunded credit commitments	105,000	18,000	225,000	125,000	'
Total provision for credit losses	2,034,000	2,748,000	6,753,000	7,042,000	'
General allowance for loan and lease losses	49,600,000	'	49,600,000	'	44,100,000
Increase in general portion of the allowance for loan and lease losses	'	'	5,500,000	'	'
Specific allowance for loan and lease losses	800,000	'	800,000	'	1,500,000
Decrease in specific portion of the allowance for loan and lease losses	'	'	700,000	'	'
Unallocated allowance for loan and lease losses	2,400,000	'	2,400,000	'	2,900,000
Decrease in unallocated portion of the allowance for loan and lease losses	'	'	500,000	'	'
Commercial Real Estate	'	'	'	'	'
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	26,715,000	22,019,000	23,022,000	20,018,000	'
Charge-offs	-64,000	-7,000	-64,000	-88,000	'
Recoveries	0	0	0	4,000	'
Provision (credit) for loan and lease losses	2,769,000	447,000	6,462,000	2,525,000	'
Balance at the end of the period	29,420,000	22,459,000	29,420,000	22,459,000	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	2,769,000	447,000	6,462,000	2,525,000	'
Number of loan classes within specific portfolio	3	'	3	'	'
Commercial	'	'	'	'	'
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	15,866,000	11,791,000	15,220,000	10,655,000	'
Charge-offs	-605,000	-219,000	-1,952,000	-943,000	'
Recoveries	261,000	62,000	730,000	326,000	'
Provision (credit) for loan and lease losses	-1,573,000	2,036,000	-49,000	3,632,000	'
Balance at the end of the period	13,949,000	13,670,000	13,949,000	13,670,000	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	-1,573,000	2,036,000	-49,000	3,632,000	'
Number of loan classes within specific portfolio	3	'	3	'	'
Indirect Automobile	'	'	'	'	'
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	3,686,000	4,695,000	3,924,000	5,304,000	'
Charge-offs	-264,000	-510,000	-781,000	-1,190,000	'
Recoveries	55,000	116,000	332,000	395,000	'
Provision (credit) for loan and lease losses	-16,000	15,000	-14,000	-193,000	'
Balance at the end of the period	3,461,000	4,316,000	3,461,000	4,316,000	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	-16,000	15,000	-14,000	-193,000	'
Consumer	'	'	'	'	'
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	3,017,000	2,999,000	3,375,000	2,545,000	'
Charge-offs	-203,000	-167,000	-585,000	-373,000	'
Recoveries	27,000	104,000	141,000	190,000	'
Provision (credit) for loan and lease losses	728,000	179,000	638,000	753,000	'
Balance at the end of the period	3,569,000	3,115,000	3,569,000	3,115,000	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	728,000	179,000	638,000	753,000	'
Number of loan classes within specific portfolio	3	'	3	'	'
Unallocated	'	'	'	'	'
Changes in allowance for loan losses	'	'	'	'	'
Balance at the beginning of the period	2,402,000	2,777,000	2,932,000	2,630,000	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Provision (credit) for loan and lease losses	21,000	53,000	-509,000	200,000	'
Balance at the end of the period	2,423,000	2,830,000	2,423,000	2,830,000	'
Provision (credit) for loan and lease losses:	'	'	'	'	'
Total provision for loan and lease losses	$21,000	$53,000	($509,000)	$200,000	'

Allowance_for_Loan_and_Lease_L3

Allowance for Loan and Lease Losses (Details 2) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Credit Quality Information	'	'
Recorded investment	$4,736,028	$4,362,465
Originated	'	'
Credit Quality Information	'	'
Recorded investment	4,026,624	3,547,053
Acquired	'	'
Credit Quality Information	'	'
Recorded investment	709,404	815,412
Commercial real estate mortgage	'	'
Credit Quality Information	'	'
Recorded investment	1,610,592	1,461,985
Commercial real estate mortgage | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,313,218	1,111,750
Commercial real estate mortgage | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	297,374	350,235
Commercial real estate mortgage | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,303,529	1,099,108
Commercial real estate mortgage | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	279,812	332,145
Commercial real estate mortgage | OAEM | Originated	'	'
Credit Quality Information	'	'
Recorded investment	8,626	11,555
Commercial real estate mortgage | OAEM | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	8,842	7,556
Commercial real estate mortgage | Substandard | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,063	1,087
Commercial real estate mortgage | Substandard | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	8,674	8,645
Commercial real estate mortgage | Doubtful | Originated	'	'
Credit Quality Information	'	'
Recorded investment	0	0
Commercial real estate mortgage | Doubtful | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	46	1,889
Multi-family mortgage	'	'
Credit Quality Information	'	'
Recorded investment	630,852	627,933
Multi-family mortgage | Originated	'	'
Credit Quality Information	'	'
Recorded investment	564,536	554,555
Multi-family mortgage | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	66,316	73,378
Multi-family mortgage | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	564,171	554,183
Multi-family mortgage | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	63,327	69,310
Multi-family mortgage | OAEM | Originated	'	'
Credit Quality Information	'	'
Recorded investment	365	372
Multi-family mortgage | OAEM | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	723	463
Multi-family mortgage | Substandard | Originated	'	'
Credit Quality Information	'	'
Recorded investment	0	0
Multi-family mortgage | Substandard | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	2,266	3,605
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	161,279	113,705
Construction | Originated	'	'
Credit Quality Information	'	'
Recorded investment	151,199	102,927
Construction | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	10,080	10,778
Construction | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	151,199	102,927
Construction | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	9,843	10,090
Construction | OAEM | Originated	'	'
Credit Quality Information	'	'
Recorded investment	0	0
Construction | OAEM | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	237	688
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	495,712	407,792
Commercial | Originated	'	'
Credit Quality Information	'	'
Recorded investment	390,912	297,684
Commercial | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	104,800	110,108
Commercial | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	380,023	295,057
Commercial | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	94,492	96,779
Commercial | OAEM | Originated	'	'
Credit Quality Information	'	'
Recorded investment	8,701	49
Commercial | OAEM | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	2,450	4,617
Commercial | Substandard | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,030	1,078
Commercial | Substandard | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	7,704	8,518
Commercial | Doubtful | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,158	1,500
Commercial | Doubtful | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	154	194
Equipment Financing	'	'
Credit Quality Information	'	'
Recorded investment	576,541	513,024
Equipment Financing | Originated	'	'
Credit Quality Information	'	'
Recorded investment	560,435	485,330
Equipment Financing | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	16,106	27,694
Equipment Financing | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	556,230	479,811
Equipment Financing | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	16,015	27,535
Equipment Financing | OAEM | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,009	625
Equipment Financing | OAEM | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	0	61
Equipment Financing | Substandard | Originated	'	'
Credit Quality Information	'	'
Recorded investment	2,510	4,817
Equipment Financing | Substandard | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	91	98
Equipment Financing | Doubtful | Originated	'	'
Credit Quality Information	'	'
Recorded investment	686	77
Equipment Financing | Doubtful | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	0	0
Condominium association	'	'
Credit Quality Information	'	'
Recorded investment	49,600	44,794
Condominium association | Originated	'	'
Credit Quality Information	'	'
Recorded investment	49,600	44,794
Condominium association | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	0	0
Condominium association | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	49,600	44,793
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	1
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	13,299	7,055
Other Consumer | Originated	'	'
Credit Quality Information	'	'
Recorded investment	12,616	5,532
Other Consumer | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	683	1,523
Other Consumer | Pass | Originated	'	'
Credit Quality Information	'	'
Recorded investment	12,606	5,528
Other Consumer | Pass | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	672	1,509
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	10	4
Other Consumer | Substandard | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	11	14
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	353,263	400,531
Indirect Automobile | Originated	'	'
Credit Quality Information	'	'
Recorded investment	353,263	400,531
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	291,648	332,140
Percentage of loans to aggregate outstanding amount	82.60%	82.90%
Indirect Automobile | Credit score, 661-700 | Originated	'	'
Credit Quality Information	'	'
Recorded investment	48,926	54,038
Percentage of loans to aggregate outstanding amount	13.80%	13.50%
Indirect Automobile | Credit score, 660 and below | Originated	'	'
Credit Quality Information	'	'
Recorded investment	11,007	12,793
Percentage of loans to aggregate outstanding amount	3.10%	3.20%
Indirect Automobile | Data not available | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,682	1,560
Percentage of loans to aggregate outstanding amount	0.50%	0.40%
Residential mortgage	'	'
Credit Quality Information	'	'
Recorded investment	570,128	528,185
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Residential mortgage | Originated	'	'
Credit Quality Information	'	'
Recorded investment	466,309	411,554
Percentage of loans to aggregate outstanding amount	81.80%	77.90%
Residential mortgage | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	103,819	116,631
Percentage of loans to aggregate outstanding amount	18.20%	22.10%
Residential mortgage | Loan-to-value ratio, less than 50% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	102,788	94,500
Percentage of loans to aggregate outstanding amount	18.00%	17.90%
Residential mortgage | Loan-to-value ratio, less than 50% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	19,858	23,101
Percentage of loans to aggregate outstanding amount	3.50%	4.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	166,126	149,969
Percentage of loans to aggregate outstanding amount	29.10%	28.40%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	36,313	39,298
Percentage of loans to aggregate outstanding amount	6.40%	7.40%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	172,458	139,960
Percentage of loans to aggregate outstanding amount	30.30%	26.50%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	25,974	31,932
Percentage of loans to aggregate outstanding amount	4.60%	6.00%
Residential mortgage | Loan-to-value ratio, 80% and over | Originated	'	'
Credit Quality Information	'	'
Recorded investment	23,275	22,772
Percentage of loans to aggregate outstanding amount	4.10%	4.30%
Residential mortgage | Loan-to-value ratio, 80% and over | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	17,358	19,870
Percentage of loans to aggregate outstanding amount	3.00%	3.80%
Residential mortgage | Data not available | Originated	'	'
Credit Quality Information	'	'
Recorded investment	1,662	4,353
Percentage of loans to aggregate outstanding amount	0.30%	0.80%
Residential mortgage | Data not available | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	4,316	2,430
Percentage of loans to aggregate outstanding amount	0.70%	0.50%
Home Equity	'	'
Credit Quality Information	'	'
Recorded investment	274,762	257,461
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Home Equity | Originated	'	'
Credit Quality Information	'	'
Recorded investment	164,536	132,396
Percentage of loans to aggregate outstanding amount	59.90%	51.40%
Home Equity | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	110,226	125,065
Percentage of loans to aggregate outstanding amount	40.10%	48.60%
Home Equity | Loan-to-value ratio, less than 50% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	101,061	75,372
Percentage of loans to aggregate outstanding amount	36.80%	29.30%
Home Equity | Loan-to-value ratio, less than 50% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	73,237	84,272
Percentage of loans to aggregate outstanding amount	26.70%	32.70%
Home Equity | Loan-to-value ratio, 50% - 69% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	33,576	31,504
Percentage of loans to aggregate outstanding amount	12.20%	12.20%
Home Equity | Loan-to-value ratio, 50% - 69% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	23,751	25,964
Percentage of loans to aggregate outstanding amount	8.60%	10.10%
Home Equity | Loan-to-value ratio, 70% - 79% | Originated	'	'
Credit Quality Information	'	'
Recorded investment	24,805	21,161
Percentage of loans to aggregate outstanding amount	9.00%	8.20%
Home Equity | Loan-to-value ratio, 70% - 79% | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	11,200	13,390
Percentage of loans to aggregate outstanding amount	4.10%	5.20%
Home Equity | Loan-to-value ratio, 80% and over | Originated	'	'
Credit Quality Information	'	'
Recorded investment	4,129	3,240
Percentage of loans to aggregate outstanding amount	1.50%	1.30%
Home Equity | Loan-to-value ratio, 80% and over | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	1,185	1,208
Percentage of loans to aggregate outstanding amount	0.40%	0.50%
Home Equity | Data not available | Originated	'	'
Credit Quality Information	'	'
Recorded investment	965	1,119
Percentage of loans to aggregate outstanding amount	0.40%	0.40%
Home Equity | Data not available | Acquired	'	'
Credit Quality Information	'	'
Recorded investment	$853	$231
Percentage of loans to aggregate outstanding amount	0.30%	0.10%

Allowance_for_Loan_and_Lease_L4

Allowance for Loan and Lease Losses (Details 3) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Age analysis of past due loans	'	'
Past due 31-60 days	$13,007	$34,125
Past due 61-90 days	8,557	5,882
Past due Greater than 90 days	11,913	17,861
Past due Total	33,477	57,868
Current	4,702,551	4,304,597
Total Loans and Leases	4,736,028	4,362,465
Loans and leases past due greater than 90 days and accruing	3,919	10,913
Nonaccrual loans and leases	17,322	16,501
Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	8,013	28,288
Past due 61-90 days	3,359	3,884
Past due Greater than 90 days	3,607	3,690
Past due Total	14,979	35,862
Current	4,011,645	3,511,191
Total Loans and Leases	4,026,624	3,547,053
Loans and leases past due greater than 90 days and accruing	0	10
Nonaccrual loans and leases	7,440	8,245
Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	4,994	5,837
Past due 61-90 days	5,198	1,998
Past due Greater than 90 days	8,306	14,171
Past due Total	18,498	22,006
Current	690,906	793,406
Total Loans and Leases	709,404	815,412
Loans and leases past due greater than 90 days and accruing	3,919	10,903
Nonaccrual loans and leases	9,882	8,256
Commercial real estate loans	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	2,402,723	2,203,623
Commercial real estate loans | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	285	19,296
Past due 61-90 days	1,131	1,393
Past due Greater than 90 days	32	169
Past due Total	1,448	20,858
Current	2,027,505	1,748,374
Total Loans and Leases	2,028,953	1,769,232
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	1,063	169
Commercial real estate loans | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	3,283	1,548
Past due 61-90 days	3,936	496
Past due Greater than 90 days	1,751	5,939
Past due Total	8,970	7,983
Current	364,800	426,408
Total Loans and Leases	373,770	434,391
Loans and leases past due greater than 90 days and accruing	1,071	5,010
Nonaccrual loans and leases	2,410	929
Commercial real estate mortgage	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	1,610,592	1,461,985
Commercial real estate mortgage | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	285	4,896
Past due 61-90 days	1,131	1,393
Past due Greater than 90 days	32	169
Past due Total	1,448	6,458
Current	1,311,770	1,105,292
Total Loans and Leases	1,313,218	1,111,750
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	1,063	169
Commercial real estate mortgage | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	2,908	1,221
Past due 61-90 days	3,936	87
Past due Greater than 90 days	1,751	4,887
Past due Total	8,595	6,195
Current	288,779	344,040
Total Loans and Leases	297,374	350,235
Loans and leases past due greater than 90 days and accruing	1,071	3,958
Nonaccrual loans and leases	2,111	929
Multi-family mortgage	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	630,852	627,933
Multi-family mortgage | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	0	14,400
Past due 61-90 days	0	0
Past due Greater than 90 days	0	0
Past due Total	0	14,400
Current	564,536	540,155
Total Loans and Leases	564,536	554,555
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 31-60 days	375	327
Past due 61-90 days	0	0
Past due Greater than 90 days	0	1,052
Past due Total	375	1,379
Current	65,941	71,999
Total Loans and Leases	66,316	73,378
Loans and leases past due greater than 90 days and accruing	0	1,052
Nonaccrual loans and leases	299	0
Construction	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	161,279	113,705
Construction | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	0	0
Past due 61-90 days	0	0
Past due Greater than 90 days	0	0
Past due Total	0	0
Current	151,199	102,927
Total Loans and Leases	151,199	102,927
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 31-60 days	0	0
Past due 61-90 days	0	409
Past due Greater than 90 days	0	0
Past due Total	0	409
Current	10,080	10,369
Total Loans and Leases	10,080	10,778
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	1,121,853	965,610
Commercial loans | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	2,381	3,155
Past due 61-90 days	1,447	1,633
Past due Greater than 90 days	2,902	2,873
Past due Total	6,730	7,661
Current	994,217	820,147
Total Loans and Leases	1,000,947	827,808
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	3,976	5,638
Commercial loans | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	743	2,753
Past due 61-90 days	387	162
Past due Greater than 90 days	3,171	2,004
Past due Total	4,301	4,919
Current	116,605	132,883
Total Loans and Leases	120,906	137,802
Loans and leases past due greater than 90 days and accruing	853	1,308
Nonaccrual loans and leases	4,851	4,626
Commercial	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	495,712	407,792
Commercial | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	173	2,288
Past due 61-90 days	42	75
Past due Greater than 90 days	1,160	842
Past due Total	1,375	3,205
Current	389,537	294,479
Total Loans and Leases	390,912	297,684
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	1,239	1,551
Commercial | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	742	2,707
Past due 61-90 days	387	121
Past due Greater than 90 days	3,099	1,931
Past due Total	4,228	4,759
Current	100,572	105,349
Total Loans and Leases	104,800	110,108
Loans and leases past due greater than 90 days and accruing	780	1,235
Nonaccrual loans and leases	4,832	4,597
Equipment financing	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	576,541	513,024
Equipment financing | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	2,058	867
Past due 61-90 days	1,405	1,558
Past due Greater than 90 days	1,742	2,031
Past due Total	5,205	4,456
Current	555,230	480,874
Total Loans and Leases	560,435	485,330
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	2,737	4,086
Equipment financing | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	1	46
Past due 61-90 days	0	41
Past due Greater than 90 days	72	73
Past due Total	73	160
Current	16,033	27,534
Total Loans and Leases	16,106	27,694
Loans and leases past due greater than 90 days and accruing	73	73
Nonaccrual loans and leases	19	29
Condominium association	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	49,600	44,794
Condominium association | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	150	0
Past due 61-90 days	0	0
Past due Greater than 90 days	0	0
Past due Total	150	0
Current	49,450	44,794
Total Loans and Leases	49,600	44,794
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	0	1
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	353,263	400,531
Indirect automobile | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	4,136	5,407
Past due 61-90 days	646	857
Past due Greater than 90 days	113	229
Past due Total	4,895	6,493
Current	348,368	394,038
Total Loans and Leases	353,263	400,531
Loans and leases past due greater than 90 days and accruing	0	10
Nonaccrual loans and leases	474	259
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	858,189	792,701
Consumer loans | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	1,211	430
Past due 61-90 days	135	1
Past due Greater than 90 days	560	419
Past due Total	1,906	850
Current	641,555	548,632
Total Loans and Leases	643,461	549,482
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	1,927	2,179
Consumer loans | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	968	1,536
Past due 61-90 days	875	1,340
Past due Greater than 90 days	3,384	6,228
Past due Total	5,227	9,104
Current	209,501	234,115
Total Loans and Leases	214,728	243,219
Loans and leases past due greater than 90 days and accruing	1,995	4,585
Nonaccrual loans and leases	2,621	2,701
Residential mortgage	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	570,128	528,185
Residential mortgage | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	974	201
Past due 61-90 days	0	0
Past due Greater than 90 days	502	415
Past due Total	1,476	616
Current	464,833	410,938
Total Loans and Leases	466,309	411,554
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	1,847	1,713
Residential mortgage | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	0	271
Past due 61-90 days	604	777
Past due Greater than 90 days	2,521	5,329
Past due Total	3,125	6,377
Current	100,694	110,254
Total Loans and Leases	103,819	116,631
Loans and leases past due greater than 90 days and accruing	1,995	4,468
Nonaccrual loans and leases	789	1,162
Home equity	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	274,762	257,461
Home equity | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	217	218
Past due 61-90 days	130	0
Past due Greater than 90 days	36	0
Past due Total	383	218
Current	164,153	132,178
Total Loans and Leases	164,536	132,396
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	58	462
Home equity | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	964	1,259
Past due 61-90 days	263	552
Past due Greater than 90 days	847	895
Past due Total	2,074	2,706
Current	108,152	122,359
Total Loans and Leases	110,226	125,065
Loans and leases past due greater than 90 days and accruing	0	117
Nonaccrual loans and leases	1,807	1,525
Other consumer	'	'
Age analysis of past due loans	'	'
Total Loans and Leases	13,299	7,055
Other consumer | Originated	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	20	11
Past due 61-90 days	5	1
Past due Greater than 90 days	22	4
Past due Total	47	16
Current	12,569	5,516
Total Loans and Leases	12,616	5,532
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	22	4
Other consumer | Acquired	'	'
Age analysis of past due loans	'	'
Past due 31-60 days	4	6
Past due 61-90 days	8	11
Past due Greater than 90 days	16	4
Past due Total	28	21
Current	655	1,502
Total Loans and Leases	683	1,523
Loans and leases past due greater than 90 days and accruing	0	0
Nonaccrual loans and leases	$25	$14

Allowance_for_Loan_and_Lease_L5

Allowance for Loan and Lease Losses (Details 4)	Sep. 30, 2014
	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	34.00%
Multi-family mortgage	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	13.30%
Construction loans	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	3.40%
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	10.50%
Equipment financing	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	12.20%
Condominium association	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	1.00%
Indirect automobile	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	7.50%
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	12.00%
Home equity	'
Allowance for loan losses and recorded investment in loans	'
Percentage of loans to aggregate outstanding amount	5.80%
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			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Impaired Loans and Leases	'		'	'		'	'
Recorded investment	$46,697,000	[1]	'	$46,697,000	[1]	'	$33,206,000	[2]
Unpaid principal balance	47,148,000		'	47,148,000		'	34,409,000
Related allowance	827,000		'	827,000		'	1,473,000
Average recorded investment	48,993,000		36,042,000	49,052,000		33,105,000	'
Interest income recognized, Total	324,000		229,000	893,000		656,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	52,822,000		'	52,822,000		'	48,473,000
Total Loans and Leases	4,736,028,000		'	4,736,028,000		'	4,362,465,000
Originated	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	16,683,000	[1]	'	16,683,000	[1]	'	7,408,000	[2]
Recorded investment, loans with related allowance recorded	1,220,000	[1]	'	1,220,000	[1]	'	6,307,000	[2]
Recorded investment	17,903,000	[1]	'	17,903,000	[1]	'	13,715,000	[2]
Recorded investment, nonaccrual loans	5,200,000		'	5,200,000		'	5,800,000
Unpaid principal balance with no related allowance recorded	16,653,000		'	16,653,000		'	7,395,000
Unpaid principal balance with related allowance recorded	1,219,000		'	1,219,000		'	6,289,000
Unpaid principal balance	17,872,000		'	17,872,000		'	13,684,000
Related allowance	565,000		'	565,000		'	1,182,000
Average recorded investment with no related allowance recorded	16,862,000		8,932,000	11,752,000		7,339,000	'
Average recorded investment with related allowance recorded	1,371,000		5,662,000	5,293,000		6,643,000	'
Average recorded investment	18,233,000		14,594,000	17,045,000		13,982,000	'
Interest income recognized with no related allowance recorded	164,000		71,000	295,000		204,000	'
Interest income recognized with related allowance recorded	1,000		38,000	86,000		122,000	'
Interest income recognized, Total	165,000		109,000	381,000		326,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	565,000		'	565,000		'	1,182,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	50,324,000		'	50,324,000		'	45,662,000
Total, Allowance	50,889,000		'	50,889,000		'	46,844,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	17,903,000		'	17,903,000		'	13,715,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	4,008,721,000		'	4,008,721,000		'	3,533,338,000
Total Loans and Leases	4,026,624,000		'	4,026,624,000		'	3,547,053,000
Acquired	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	24,390,000	[1]	'	24,390,000	[1]	'	17,197,000	[2]
Recorded investment, loans with related allowance recorded	4,404,000	[1]	'	4,404,000	[1]	'	2,294,000	[2]
Recorded investment	28,794,000	[1]	'	28,794,000	[1]	'	19,491,000	[2]
Recorded investment, nonaccrual loans	9,800,000		'	9,800,000		'	5,700,000
Unpaid principal balance with no related allowance recorded	24,582,000		'	24,582,000		'	18,367,000
Unpaid principal balance with related allowance recorded	4,694,000		'	4,694,000		'	2,358,000
Unpaid principal balance	29,276,000		'	29,276,000		'	20,725,000
Related allowance	262,000		'	262,000		'	291,000
Average recorded investment with no related allowance recorded	26,298,000		16,430,000	27,451,000		15,962,000	'
Average recorded investment with related allowance recorded	4,462,000		5,018,000	4,556,000		3,161,000	'
Average recorded investment	30,760,000		21,448,000	32,007,000		19,123,000	'
Interest income recognized with no related allowance recorded	122,000		78,000	419,000		288,000	'
Interest income recognized with related allowance recorded	37,000		42,000	93,000		42,000	'
Interest income recognized, Total	159,000		120,000	512,000		330,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	149,000		'	149,000		'	3,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	44,000		'	44,000		'	384,000
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	1,740,000		'	1,740,000		'	1,242,000
Total, Allowance	1,933,000		'	1,933,000		'	1,629,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	8,270,000		'	8,270,000		'	8,375,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	350,463,000		'	350,463,000		'	401,217,000
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	350,671,000		'	350,671,000		'	405,820,000
Total Loans and Leases	709,404,000		'	709,404,000		'	815,412,000
Commercial real estate loans	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	29,420,000		'	29,420,000		'	23,022,000
Total Loans and Leases	2,402,723,000		'	2,402,723,000		'	2,203,623,000
Commercial real estate loans | Originated	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	3,716,000	[1]	'	3,716,000	[1]	'	2,009,000	[2]
Recorded investment, loans with related allowance recorded	32,000	[1]	'	32,000	[1]	'	1,466,000	[2]
Unpaid principal balance with no related allowance recorded	3,713,000		'	3,713,000		'	2,009,000
Unpaid principal balance with related allowance recorded	32,000		'	32,000		'	1,466,000
Related allowance	34,000		'	34,000		'	184,000
Average recorded investment with no related allowance recorded	3,727,000		2,285,000	2,857,000		2,200,000	'
Average recorded investment with related allowance recorded	118,000		1,131,000	1,097,000		1,516,000	'
Interest income recognized with no related allowance recorded	32,000		19,000	80,000		69,000	'
Interest income recognized with related allowance recorded	0		13,000	22,000		26,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	34,000		'	34,000		'	184,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	28,344,000		'	28,344,000		'	22,336,000
Total, Allowance	28,378,000		'	28,378,000		'	22,520,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	3,749,000		'	3,749,000		'	3,643,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	2,025,204,000		'	2,025,204,000		'	1,765,589,000
Total Loans and Leases	2,028,953,000		'	2,028,953,000		'	1,769,232,000
Commercial real estate loans | Acquired	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	10,092,000	[1]	'	10,092,000	[1]	'	9,176,000	[2]
Recorded investment, loans with related allowance recorded	3,160,000	[1]	'	3,160,000	[1]	'	1,274,000	[2]
Unpaid principal balance with no related allowance recorded	10,116,000		'	10,116,000		'	10,082,000
Unpaid principal balance with related allowance recorded	3,450,000		'	3,450,000		'	1,291,000
Related allowance	33,000		'	33,000		'	122,000
Average recorded investment with no related allowance recorded	11,652,000		9,305,000	13,211,000		9,783,000	'
Average recorded investment with related allowance recorded	3,164,000		3,975,000	3,035,000		2,776,000	'
Interest income recognized with no related allowance recorded	73,000		36,000	301,000		178,000	'
Interest income recognized with related allowance recorded	36,000		42,000	76,000		42,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	145,000		'	145,000		'	-54,000
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	897,000		'	897,000		'	556,000
Total, Allowance	1,042,000		'	1,042,000		'	502,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	1,131,000		'	1,131,000		'	2,625,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	121,285,000		'	121,285,000		'	145,057,000
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	251,354,000		'	251,354,000		'	286,709,000
Total Loans and Leases	373,770,000		'	373,770,000		'	434,391,000
Commercial	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	13,949,000		'	13,949,000		'	15,220,000
Total Loans and Leases	1,121,853,000		'	1,121,853,000		'	965,610,000
Commercial | Originated	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	9,410,000	[1]	'	9,410,000	[1]	'	4,410,000	[2]
Recorded investment, loans with related allowance recorded	1,175,000	[1]	'	1,175,000	[1]	'	2,393,000	[2]
Unpaid principal balance with no related allowance recorded	9,392,000		'	9,392,000		'	4,399,000
Unpaid principal balance with related allowance recorded	1,174,000		'	1,174,000		'	2,383,000
Related allowance	531,000		'	531,000		'	675,000
Average recorded investment with no related allowance recorded	9,567,000		5,661,000	6,386,000		4,031,000	'
Average recorded investment with related allowance recorded	1,239,000		1,070,000	2,898,000		1,810,000	'
Interest income recognized with no related allowance recorded	118,000		48,000	188,000		109,000	'
Interest income recognized with related allowance recorded	1,000		3,000	49,000		14,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	531,000		'	531,000		'	675,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	13,187,000		'	13,187,000		'	14,056,000
Total, Allowance	13,718,000		'	13,718,000		'	14,731,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	10,585,000		'	10,585,000		'	6,634,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	990,362,000		'	990,362,000		'	821,174,000
Total Loans and Leases	1,000,947,000		'	1,000,947,000		'	827,808,000
Commercial | Acquired	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	7,635,000	[1]	'	7,635,000	[1]	'	6,988,000	[2]
Recorded investment, loans with related allowance recorded	760,000	[1]	'	760,000	[1]	'	1,020,000	[2]
Unpaid principal balance with no related allowance recorded	7,803,000		'	7,803,000		'	7,248,000
Unpaid principal balance with related allowance recorded	760,000		'	760,000		'	1,067,000
Related allowance	203,000		'	203,000		'	169,000
Average recorded investment with no related allowance recorded	8,017,000		5,790,000	7,671,000		4,800,000	'
Average recorded investment with related allowance recorded	760,000		1,043,000	1,085,000		385,000	'
Interest income recognized with no related allowance recorded	36,000		38,000	95,000		93,000	'
Interest income recognized with related allowance recorded	0		0	15,000		0	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	123,000		'	123,000		'	3,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	-103,000		'	-103,000		'	234,000
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	211,000		'	211,000		'	252,000
Total, Allowance	231,000		'	231,000		'	489,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	4,581,000		'	4,581,000		'	4,878,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	87,850,000		'	87,850,000		'	93,565,000
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	28,475,000		'	28,475,000		'	39,359,000
Total Loans and Leases	120,906,000		'	120,906,000		'	137,802,000
Indirect automobile	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	3,461,000		'	3,461,000		'	3,924,000
Total Loans and Leases	353,263,000		'	353,263,000		'	400,531,000
Indirect automobile | Originated	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	3,461,000		'	3,461,000		'	3,924,000
Total, Allowance	3,461,000		'	3,461,000		'	3,924,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	353,263,000		'	353,263,000		'	400,531,000
Total Loans and Leases	353,263,000		'	353,263,000		'	400,531,000
Indirect automobile | Acquired	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	0		'	0		'	0
Total, Allowance	0		'	0		'	0
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	0		'	0		'	0
Total Loans and Leases	0		'	0		'	0
Consumer loans	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	3,569,000		'	3,569,000		'	3,375,000
Total Loans and Leases	858,189,000		'	858,189,000		'	792,701,000
Consumer loans | Originated	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	3,557,000	[1]	'	3,557,000	[1]	'	989,000	[2]
Recorded investment, loans with related allowance recorded	13,000	[1]	'	13,000	[1]	'	2,448,000	[2]
Unpaid principal balance with no related allowance recorded	3,548,000		'	3,548,000		'	987,000
Unpaid principal balance with related allowance recorded	13,000		'	13,000		'	2,440,000
Related allowance	0		'	0		'	323,000
Average recorded investment with no related allowance recorded	3,568,000		986,000	2,509,000		1,108,000	'
Average recorded investment with related allowance recorded	14,000		3,461,000	1,298,000		3,317,000	'
Interest income recognized with no related allowance recorded	14,000		4,000	27,000		26,000	'
Interest income recognized with related allowance recorded	0		22,000	15,000		82,000	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	323,000
Loans and Leases Collectively Evaluated for Impairment, Allowance	2,909,000		'	2,909,000		'	2,414,000
Total, Allowance	2,909,000		'	2,909,000		'	2,737,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	3,569,000		'	3,569,000		'	3,438,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	639,892,000		'	639,892,000		'	546,044,000
Total Loans and Leases	643,461,000		'	643,461,000		'	549,482,000
Consumer loans | Acquired	'		'	'		'	'
Impaired Loans and Leases	'		'	'		'	'
Recorded investment, loans with no related allowance recorded	6,663,000	[1]	'	6,663,000	[1]	'	1,033,000	[2]
Recorded investment, loans with related allowance recorded	484,000	[1]	'	484,000	[1]	'	0	[2]
Unpaid principal balance with no related allowance recorded	6,663,000		'	6,663,000		'	1,037,000
Unpaid principal balance with related allowance recorded	484,000		'	484,000		'	0
Related allowance	26,000		'	26,000		'	0
Average recorded investment with no related allowance recorded	6,629,000		1,335,000	6,569,000		1,379,000	'
Average recorded investment with related allowance recorded	538,000		0	436,000		0	'
Interest income recognized with no related allowance recorded	13,000		4,000	23,000		17,000	'
Interest income recognized with related allowance recorded	1,000		0	2,000		0	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	26,000		'	26,000		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	2,000		'	2,000		'	204,000
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	632,000		'	632,000		'	434,000
Total, Allowance	660,000		'	660,000		'	638,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	2,558,000		'	2,558,000		'	872,000
Loans and Leases Collectively Evaluated for Impairment, Portfolio	141,328,000		'	141,328,000		'	162,595,000
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	70,842,000		'	70,842,000		'	79,752,000
Total Loans and Leases	214,728,000		'	214,728,000		'	243,219,000
Unallocated	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Total, Allowance	2,423,000		'	2,423,000		'	2,932,000
Total Loans and Leases	0		'	0		'	0
Unallocated | Originated	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	2,423,000		'	2,423,000		'	2,932,000
Total, Allowance	2,423,000		'	2,423,000		'	2,932,000
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		'	0		'	0
Total Loans and Leases	0		'	0		'	0
Unallocated | Acquired	'		'	'		'	'
Recorded investment in loans and leases by portfolio segment	'		'	'		'	'
Loans and Leases Individually Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Allowance	0		'	0		'	0
Loans and Leases Acquired with Deteriorated Credit Quality, Allowance	0		'	0		'	0
Total, Allowance	0		'	0		'	0
Loans and Leases Individually Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Collectively Evaluated for Impairment, Portfolio	0		'	0		'	0
Loans and Leases Acquired with Deteriorated Credit Quality, Portfolio	0		'	0		'	0
Total Loans and Leases	$0		'	$0		'	$0
[1]	)Includes originated and acquired nonaccrual loans of $5.2 million and $9.8 million, respectively at September 30, 2014.
[2]	Includes originated and acquired nonaccrual loans of $5.8 million and $5.7 million, respectively at December 31, 2013.

Allowance_for_Loan_and_Lease_L7

Allowance for Loan and Lease Losses (Details 6) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	loan	loan	loan	loan
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	10	4	19	15
Recorded Investment, At modification	$3,517,000	$1,848,000	$6,575,000	$4,851,000
Recorded Investment, At end of period	3,593,000	1,815,000	6,562,000	3,737,000
Specific Allowance for Loan and Lease Losses	18,000	12,000	18,000	54,000
Nonaccrual Loans and Leases/Recorded Investment	236,000	0	971,000	793,000
Total loans with one modification	3,049,000	1,815,000	4,509,000	3,737,000
Total loans with more than one modification	544,000	0	2,053,000	0
Financial impact of modification of performing and nonperforming loans, less than $0.1 million three months ended September 30, 2014	100,000	100,000	200,000	500,000
Commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings	'	'	0	0
Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	6	1	13	11
Recorded Investment, At modification	2,666,000	558,000	5,471,000	3,137,000
Recorded Investment, At end of period	2,669,000	558,000	5,410,000	2,059,000
Specific Allowance for Loan and Lease Losses	18,000	12,000	18,000	54,000
Nonaccrual Loans and Leases/Recorded Investment	191,000	0	698,000	372,000
Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	4	3	6	4
Recorded Investment, At modification	851,000	1,290,000	1,104,000	1,714,000
Recorded Investment, At end of period	924,000	1,257,000	1,152,000	1,678,000
Specific Allowance for Loan and Lease Losses	0	0	0	0
Nonaccrual Loans and Leases/Recorded Investment	45,000	0	273,000	421,000
Extended maturity	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Total loans with one modification	2,849,000	1,257,000	3,427,000	1,257,000
Total loans with more than one modification	36,000	0	1,253,000	0
Adjusted principal	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Total loans with one modification	0	0	0	372,000
Total loans with more than one modification	508,000	0	508,000	0
Adjusted interest rate	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Total loans with one modification	0	558,000	866,000	1,351,000
Interest only	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Total loans with one modification	0	0	16,000	0
Total loans with more than one modification	0	0	292,000	0
Combination of maturity, principal, interest rate	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Total loans with one modification	200,000	0	200,000	757,000
Defaulted	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	1	3	11	3
Nonaccrual Loans and Leases/Recorded Investment	1,335,000	3,230,000	3,172,000	3,230,000
Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	0	2	7	2
Nonaccrual Loans and Leases/Recorded Investment	0	2,268,000	1,565,000	2,268,000
Defaulted | Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	1	1	4	1
Nonaccrual Loans and Leases/Recorded Investment	1,335,000	962,000	1,607,000	962,000
Commercial real estate mortgage | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	1	1
Recorded Investment, At modification	'	'	953,000	1,039,000
Recorded Investment, At end of period	'	'	939,000	0
Specific Allowance for Loan and Lease Losses	'	'	0	0
Nonaccrual Loans and Leases/Recorded Investment	'	'	0	0
Commercial real estate mortgage | Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	1	'	1
Recorded Investment, At modification	'	737,000	'	737,000
Recorded Investment, At end of period	'	737,000	'	737,000
Specific Allowance for Loan and Lease Losses	'	0	'	0
Nonaccrual Loans and Leases/Recorded Investment	'	0	'	0
Commercial real estate mortgage | Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	0	0
Nonaccrual Loans and Leases/Recorded Investment	'	'	0	0
Commercial real estate mortgage | Defaulted | Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	0	'	0
Nonaccrual Loans and Leases/Recorded Investment	'	0	'	0
Commercial | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	1	0	3	0
Recorded Investment, At modification	1,970,000	0	2,360,000	0
Recorded Investment, At end of period	1,970,000	0	2,336,000	0
Specific Allowance for Loan and Lease Losses	0	0	0	0
Nonaccrual Loans and Leases/Recorded Investment	0	0	16,000	0
Commercial | Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	4	2	6	3
Recorded Investment, At modification	851,000	553,000	1,104,000	977,000
Recorded Investment, At end of period	924,000	520,000	1,152,000	941,000
Specific Allowance for Loan and Lease Losses	0	0	0	0
Nonaccrual Loans and Leases/Recorded Investment	45,000	0	273,000	421,000
Commercial | Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	0	1	0	1
Nonaccrual Loans and Leases/Recorded Investment	0	1,731,000	0	1,731,000
Commercial | Defaulted | Acquired	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	1	1	4	1
Nonaccrual Loans and Leases/Recorded Investment	1,335,000	962,000	1,607,000	962,000
Equipment financing | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	5	1	7	9
Recorded Investment, At modification	696,000	558,000	1,369,000	1,683,000
Recorded Investment, At end of period	699,000	558,000	1,352,000	1,687,000
Specific Allowance for Loan and Lease Losses	18,000	12,000	18,000	54,000
Nonaccrual Loans and Leases/Recorded Investment	191,000	0	191,000	372,000
Equipment financing | Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	0	1	6	1
Nonaccrual Loans and Leases/Recorded Investment	0	537,000	1,074,000	537,000
Residential mortgage | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	1	1
Recorded Investment, At modification	'	'	497,000	415,000
Recorded Investment, At end of period	'	'	491,000	372,000
Specific Allowance for Loan and Lease Losses	'	'	0	0
Nonaccrual Loans and Leases/Recorded Investment	'	'	491,000	0
Residential mortgage | Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	1	0
Nonaccrual Loans and Leases/Recorded Investment	'	'	491,000	0
Home equity | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	1	'
Recorded Investment, At modification	'	'	292,000	'
Recorded Investment, At end of period	'	'	292,000	'
Specific Allowance for Loan and Lease Losses	'	'	0	'
Nonaccrual Loans and Leases/Recorded Investment	'	'	0	'
Home equity | Defaulted | Originated	'	'	'	'
Troubled Debt Restructured Loans and Leases	'	'	'	'
Number of loans	'	'	0	'
Nonaccrual Loans and Leases/Recorded Investment	'	'	$0	'

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	3 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jan. 31, 2014	Sep. 30, 2014
						Facility	Facility
Property, Plant and Equipment [Line Items]	'	'	'	'	'	'	'
Proceeds from sales or premises and equipment	'	'	$1,972,000	$330,000	'	$2,200,000	'
Carrying value of premises and equipment	81,479,000	'	81,479,000	'	80,505,000	400,000	'
Cost of sale	'	'	'	'	'	'	200,000
Gain on sale/disposals of premises and equipment, net	($2,000)	$21,000	$1,502,000	$0	'	'	$1,600,000

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Goodwill and Intangible Assets [Line Items]	'	'
Goodwill	$137,890	$137,890
Total other intangible assets	14,371	16,887
Total goodwill and other intangible assets	152,261	154,777
Trade name	'	'
Schedule of Goodwill and Intangible Assets [Line Items]	'	'
Total other intangible assets	1,089	1,089
Trust relationship	'	'
Schedule of Goodwill and Intangible Assets [Line Items]	'	'
Total other intangible assets	0	21
Core deposits	'	'
Schedule of Goodwill and Intangible Assets [Line Items]	'	'
Total other intangible assets	$13,282	$15,777

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details 2) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Scheduled amortization expense attributable to other acquisition-related intangible assets	'
Remainder of 2014	$608
Year ending:	'
2015	2,868
2016	2,457
2017	1,858
2018	1,836
Thereafter	3,655
Total	$13,282

Borrowed_Funds_Details

Borrowed Funds (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 15, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 15, 2014

Sep. 15, 2014

Sep. 30, 2014

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

September 2014 - September 2024

September 2014 - September 2024

October 2024 - September 2029

October 2024 - September 2029

Subordinated debentures due June 26, 2033

Subordinated debentures due June 26, 2033

Subordinated debentures due June 26, 2033

Subordinated debentures due June 26, 2033

Subordinated debentures due March 17, 2034

Subordinated debentures due March 17, 2034

Subordinated debentures due March 17, 2034

Subordinated debentures due March 17, 2034

Subordinated debentures due September 15, 2029

Subordinated debentures due September 15, 2029

Subordinated debentures due September 15, 2029

Subordinated debentures

Subordinated debentures

Subordinated debentures

Subordinated debentures

3-month LIBOR

3-month LIBOR

3-month LIBOR

3-month LIBOR

Subordinated debentures due September 15, 2029

Subordinated debentures due September 15, 2029

Subordinated debentures due September 15, 2029

Subordinated debentures due September 15, 2029

3-month LIBOR

3-month LIBOR

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount

'

'

'

'

'

'

'

'

'

'

'

'

$75,000,000

'

'

'

'

'

Fixed interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.00%

6.00%

'

'

Basis spread on variable interest rate

'

'

'

'

'

3.10%

3.10%

'

'

2.79%

2.79%

'

'

'

'

'

3.32%

3.32%

Capitalized issuance costs

'

'

'

'

'

'

'

'

'

'

'

1,500,000

'

'

'

'

'

'

Carrying amount

1,132,865,000

812,555,000

'

4,688,000

4,666,000

'

'

4,532,000

4,497,000

'

'

73,543,000

'

0

'

'

'

'

Accretion adjustment

'

'

$800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Comprehensive_IncomeLoss_Detai

Comprehensive Income/(Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Changes in accumulated other comprehensive (loss) income by component, net of tax	'	'	'	'
Balance at the beginning of the period	($3,209)	($4,441)	($7,915)	$3,483
Other comprehensive income (loss)	-1,472	-459	3,234	-8,383
Balance at the end of the period	-4,681	-4,900	-4,681	-4,900
Investment Securities Available-for-Sale	'	'	'	'
Changes in accumulated other comprehensive (loss) income by component, net of tax	'	'	'	'
Balance at the beginning of the period	-3,574	-4,572	-8,332	3,358
Other comprehensive income (loss)	-1,407	-459	3,351	-8,389
Balance at the end of the period	-4,981	-5,031	-4,981	-5,031
Postretirement Benefits	'	'	'	'
Changes in accumulated other comprehensive (loss) income by component, net of tax	'	'	'	'
Balance at the beginning of the period	365	131	417	125
Other comprehensive income (loss)	-65	0	-117	6
Balance at the end of the period	$300	$131	$300	$131

Comprehensive_IncomeLoss_Recla

Comprehensive Income/(Loss) - Reclassifications (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Provision for income taxes	($6,779)	($4,645)	($18,548)	($15,156)
Net income attributable to Brookline Bancorp, Inc.	11,581	9,429	31,979	27,732
Investment Securities Available-for-Sale | Reclassification out of Accumulated Other Comprehensive Income	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Loss on sales of securities, net	'	'	-13	'
Provision for income taxes	'	'	5	'
Net income attributable to Brookline Bancorp, Inc.	'	'	($8)	'

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Asset Derivatives	'	'	'	'	'
Total derivatives (interest-rate products) not designated as hedging instruments	$1,310,000	'	$1,310,000	'	$825,000
Liability Derivatives	'	'	'	'	'
Total derivatives (interest-rate products) not designated as hedging instruments	1,303,000	'	1,303,000	'	856,000
Gain (Loss) Recognized in Income on Derivatives	'	'	'	'	'
Estimated net credit risk exposure	0	'	0	'	31,200
Derivatives not designated as hedging instruments | Interest-rate swaps	'	'	'	'	'
Derivatives and Hedging Activities	'	'	'	'	'
Number of interest-rate swaps	16	'	16	'	8
Notional amount of interest-rate swaps	65,700,000	'	65,700,000	'	22,400,000
Derivatives not designated as hedging instruments | Interest-rate products	'	'	'	'	'
Asset Derivatives	'	'	'	'	'
Total derivatives (interest-rate products) not designated as hedging instruments	1,310,000	'	1,310,000	'	825,000
Liability Derivatives	'	'	'	'	'
Total derivatives (interest-rate products) not designated as hedging instruments	1,303,000	'	1,303,000	'	856,000
Gain (Loss) Recognized in Income on Derivatives	'	'	'	'	'
Gain (loss) recognized in income on derivatives	$32,000	$1,000	$38,000	($24,000)	'

Derivatives_and_Hedging_Activi3

Derivatives and Hedging Activities (Details 2) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Asset Derivatives	'	'
Gross Amounts of Recognized Assets	$1,310	$825
Net Amounts Of Assets Presented in the Statement of Financial Position	1,310	825
Net Amount	1,310	825
Liability Derivatives	'	'
Gross Amounts of Recognized Liabilities	1,303	856
Net Amounts Of Liabilities Presented in the Statement of Financial Position	1,303	856
Gross Amounts Not Offset in the Statement of Financial Position	'	'
Cash Collateral Received	3,628	2,811
Net Amount	$4,931	$3,667

Stock_Based_Compensation_Detai

Stock Based Compensation (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
	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	22	'
Stock based compensation expense	$1	$0.90
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		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:	'	'	'	'
Net income	$11,581	$9,429	$31,979	$27,732
Denominator:	'	'	'	'
Weighted average shares outstanding	69,989,909	69,830,953	69,918,248	69,789,737
Effect of dilutive securities (in shares)	99,078	82,812	111,135	70,985
Adjusted weighted average shares outstanding	70,088,987	69,913,765	70,029,383	69,860,722
EPS, Basic (in dollars per share)	$0.17	$0.14	$0.46	$0.40
EPS, Fully Diluted (in dollars per share)	$0.17	$0.13	$0.46	$0.40

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets:	'	'
Total securities available-for-sale	$527,516	$492,428
Interest-rate swaps	1,310	825
Liabilities:	'	'
Interest-rate swaps	1,303	856
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 | 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	1,372	1,310
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 | Private-label CMO	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 1 | SBA commercial loan asset-backed securities	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Auction-rate municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 1 | Municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 1 | Corporate debt obligations	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Trust preferred securities and pools	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 1 | Marketable equity securities	'	'
Assets:	'	'
Total securities available-for-sale	1,372	1,310
Recurring basis | Level 2	'	'
Assets:	'	'
Interest-rate swaps	1,310	825
Liabilities:	'	'
Interest-rate swaps	1,303	856
Recurring basis | Level 2 | Securities available for sale	'	'
Assets:	'	'
Total securities available-for-sale	526,144	489,343
Recurring basis | Level 2 | GSEs	'	'
Assets:	'	'
Total securities available-for-sale	15,790	12,180
Recurring basis | Level 2 | GSE CMOs	'	'
Assets:	'	'
Total securities available-for-sale	237,228	243,644
Recurring basis | Level 2 | GSE MBSs	'	'
Assets:	'	'
Total securities available-for-sale	231,512	199,401
Recurring basis | Level 2 | Private-label CMO	'	'
Assets:	'	'
Total securities available-for-sale	'	3,355
Recurring basis | Level 2 | SBA commercial loan asset-backed securities	'	'
Assets:	'	'
Total securities available-for-sale	210	243
Recurring basis | Level 2 | Auction-rate municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 2 | Municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	1,086
Recurring basis | Level 2 | Corporate debt obligations	'	'
Assets:	'	'
Total securities available-for-sale	40,099	28,224
Recurring basis | Level 2 | Trust preferred securities and pools	'	'
Assets:	'	'
Total securities available-for-sale	1,305	1,210
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	1,775
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 | Private-label CMO	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 3 | SBA commercial loan asset-backed securities	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Auction-rate municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	1,775
Recurring basis | Level 3 | Municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	0
Recurring basis | Level 3 | Corporate debt obligations	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Trust preferred securities and pools	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Level 3 | Marketable equity securities	'	'
Assets:	'	'
Total securities available-for-sale	0	0
Recurring basis | Estimated Fair Value	'	'
Assets:	'	'
Interest-rate swaps	1,310	825
Liabilities:	'	'
Interest-rate swaps	1,303	856
Recurring basis | Estimated Fair Value | Securities available for sale	'	'
Assets:	'	'
Total securities available-for-sale	527,516	492,428
Recurring basis | Estimated Fair Value | GSEs	'	'
Assets:	'	'
Total securities available-for-sale	15,790	12,180
Recurring basis | Estimated Fair Value | GSE CMOs	'	'
Assets:	'	'
Total securities available-for-sale	237,228	243,644
Recurring basis | Estimated Fair Value | GSE MBSs	'	'
Assets:	'	'
Total securities available-for-sale	231,512	199,401
Recurring basis | Estimated Fair Value | Private-label CMO	'	'
Assets:	'	'
Total securities available-for-sale	'	3,355
Recurring basis | Estimated Fair Value | SBA commercial loan asset-backed securities	'	'
Assets:	'	'
Total securities available-for-sale	210	243
Recurring basis | Estimated Fair Value | Auction-rate municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	1,775
Recurring basis | Estimated Fair Value | Municipal obligations	'	'
Assets:	'	'
Total securities available-for-sale	'	1,086
Recurring basis | Estimated Fair Value | Corporate debt obligations	'	'
Assets:	'	'
Total securities available-for-sale	40,099	28,224
Recurring basis | Estimated Fair Value | Trust preferred securities and pools	'	'
Assets:	'	'
Total securities available-for-sale	1,305	1,210
Recurring basis | Estimated Fair Value | Marketable equity securities	'	'
Assets:	'	'
Total securities available-for-sale	$1,372	$1,310

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of assets measured at fair value on a recurring basis	'	'	'	'
Investment security sales	'	$0	'	$0
Total realized losses included in other income	'	0	'	0
Securities available for sale	'	'	'	'
Reconciliation of assets measured at fair value on a recurring basis	'	'	'	'
Investment securities available-for-sale, beginning of period	0	2,835	1,775	2,917
Investment security sales	0	'	-1,658	'
Principal paydowns and other	0	-10	0	-341
Total realized losses included in other income	0	'	-242	'
Total unrealized losses included in other comprehensive income	0	30	125	279
Investment securities available-for-sale, end of period	$0	$2,855	$0	$2,855

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Details 3) (Nonrecurring basis, USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
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	927	1,001
Level 3	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	7,894	12,676
Estimated Fair Value	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	8,821	13,677
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	6,358	12,099
Collateral-dependent impaired loans and leases | Estimated Fair Value	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	6,358	12,099
Other real estate owned | Level 1	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	0	0
Other real estate owned | Level 2	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	0	0
Other real estate owned | Level 3	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	1,536	577
Other real estate owned | Estimated Fair Value	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	1,536	577
Repossessed vehicles and equipment | Level 1	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	0	0
Repossessed vehicles and equipment | Level 2	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	927	1,001
Repossessed vehicles and equipment | Level 3	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	0	0
Repossessed vehicles and equipment | Estimated Fair Value	'	'
Fair value of assets and liabilities	'	'
Fair value of assets	$927	$1,001

Fair_Value_of_Financial_Instru5

Fair Value of Financial Instruments (Details 4) (Level 3, USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Auction-rate municipal obligations | Discounted cash flow	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Fair value of assets	0		1,775
Collateral-dependent impaired loans and leases | Appraisal of collateral	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Fair value of assets	6,358	[1]	12,099
Other real estate owned | Appraisal of collateral	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Fair value of assets	1,536	[1]	577
Minimum | Auction-rate municipal obligations | Discounted cash flow	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Discount rate	0.00%		0.00%
Maximum | Auction-rate municipal obligations | Discounted cash flow	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Discount rate	5.00%		5.00%
Weighted average | Auction-rate municipal obligations | Discounted cash flow	'		'
Quantitative information for Level 3 Fair Value Measurements Assets	'		'
Discount rate	4.00%		4.00%
[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.

Fair_Value_of_Financial_Instru6

Fair Value of Financial Instruments (Details 5) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financial assets:	'	'
Investment securities held-to-maturity	$500	$500
Loans and leases, net	4,683,206	4,313,992
Financial liabilities:	'	'
Borrowed funds	22,891	34,619
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	464	13,372
Loans and leases, net	0	0
Financial liabilities:	'	'
Certificates of deposit	910,634	938,703
Borrowed funds	1,140,450	815,910
Level 3	'	'
Financial assets:	'	'
Investment securities held-to-maturity	500	500
Loans held-for-sale	0	0
Loans and leases, net	4,783,157	4,552,556
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	464	13,372
Loans and leases, net	4,683,206	4,313,992
Financial liabilities:	'	'
Certificates of deposit	907,432	934,668
Borrowed funds	1,132,865	812,555
Estimated Fair Value	'	'
Financial assets:	'	'
Investment securities held-to-maturity	500	500
Loans held-for-sale	464	13,372
Loans and leases, net	4,783,157	4,552,556
Financial liabilities:	'	'
Certificates of deposit	910,634	938,703
Borrowed funds	$1,140,450	$815,910

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Loan commitments	'	'	'
Unadvanced portion of loans and leases	$610,087,000	'	$586,279,000
Unused lines of credit:	'	'	'
Home equity	234,180,000	'	205,665,000
Other consumer	11,100,000	'	6,503,000
Other commercial	1,081,000	'	1,035,000
Unused letters of credit:	'	'	'
Financial standby letters of credit	18,257,000	'	20,410,000
Performance standby letters of credit	3,116,000	'	2,989,000
Commercial and similar letters of credit	2,057,000	'	440,000
Back-to-back interest-rate swaps	65,746,000	'	22,418,000
Unfunded credit commitments liability included in other liabilities	1,300,000	900,000	1,000,000
Fair value of interest rate swap assets	1,300,000	'	800,000
Fair value of interest rate swap liabilities	1,300,000	'	900,000
Summary of future minimum rental payments under noncancellable operating leases year ending December 31	'	'	'
Remainder of 2014	1,360,000	'	'
Year ending:	'	'	'
2015	5,529,000	'	'
2016	5,390,000	'	'
2017	4,860,000	'	'
2018	4,285,000	'	'
Thereafter	15,606,000	'	'
Total	37,030,000	'	'
Total rental expense	5,200,000	4,000,000	'
Operating leases, rent expense, acceleration	700,000	'	'
Commercial real estate mortgage loans	'	'	'
Loan commitments	'	'	'
Commitments to originate loans and leases	45,655,000	'	48,973,000
Commercial	'	'	'
Loan commitments	'	'	'
Commitments to originate loans and leases	112,079,000	'	143,252,000
Residential mortgage	'	'	'
Loan commitments	'	'	'
Commitments to originate loans and leases	$15,792,000	'	$8,027,000

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 2) (2012 Empire Litigation, Insurance Settlement, USD $)	1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Gain Contingencies [Line Items]	'
Settlement payment	$1.80
Legal expense accruals	0.4
Other Income	'
Gain Contingencies [Line Items]	'
Settlement payment included in other income	$1.40