Independent Bank (INDB) 10-Q 5 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 02, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Independent Bank Corp
Entity Central Index Key	776,901
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	26,212,238	26,236,991

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 160,721	$ 143,342
Interest-earning deposits with banks	89,607	34,912
Securities
Trading Securities	454	0
Securities - available for sale	365,792	348,554
Securities - held to maturity (fair value $455,776 and $379,699)	448,139	375,453
Total securities	814,385	724,007
Disposal Group, Including Discontinued Operation, Mortgage Loans	11,476	6,888
Loans
Loans Receivable, Gross, Commercial and Industrial	862,512	860,839
Loans Receivable, Gross, Commercial, Mortgage	2,659,342	2,347,323
Loans Receivable, Gross, Commercial, Construction	308,214	265,994
Small Business	92,278	85,247
Loans and Leases Receivable, Gross, Consumer, Mortgage	651,937	530,259
Loans and Leases Receivable Consumer Home Equity in First Position	531,364	513,518
Loans and Leases Receivable Consumer Home Equity in Second Position	376,530	350,345
Loans and Leases Receivable, Gross, Consumer, Other	15,944	17,208
Loans and Leases Receivable, Gross	5,498,121	4,970,733
Less: allowance for loan losses	(55,205)	(55,100)
Net loans	5,442,916	4,915,633
Federal Home Loan Bank stock	37,485	33,233
Bank premises and equipment, net	73,738	64,074
Goodwill	201,083	170,421
Identifiable intangible assets	12,529	9,885
Cash surrender value of life insurance policies	133,573	109,854
Other real estate owned and other foreclosed assets	2,532	7,743
Other assets	155,444	144,920
Total assets	7,135,489	6,364,912
Deposits
Demand deposits	1,778,051	1,462,200
Savings and interest checking accounts	2,305,636	2,108,486
Money market	1,119,913	990,160
Time certificates of deposit of $100,000 and over	290,093	254,718
Other time certificates of deposits	421,170	394,902
Total deposits	5,914,863	5,210,466
Borrowings
Federal Home Loan Bank borrowings(c)	104,133	70,080
Customer Repurchase Agreements and other short-term borrowings	138,449	147,890
Wholesale repurchase agreements	0	50,000
Junior subordinated debentures	73,520	73,685
Subordinated debentures	35,000	65,000
Total borrowings	351,102	406,655
Other liabilities	110,321	107,264
Total liabilities	$ 6,376,286	$ 5,724,385
Commitments and contingencies
Stockholders' equity
Preferred stock, $.01 par value. authorized: 1,000,000 shares, outstanding: none	$ 0	$ 0
Common Stock, $.01 par value. Authorized: 75,000,000; Issued and Outstanding : 26,158,826 shares at June 30, 2015 and 23,998,738 Shares at December 31, 2014 (includes 243,710 and 254,500 shares of unvested participating restricted stock awards, respectively)	260	237
Shares held in rabbi trust at cost: 172,214 shares at September 30, 2015 and 176,849 shares at December 31, 2014	(3,883)	(3,666)
Deferred Compensation Equity	3,883	3,666
Additional paid in capital	404,089	311,978
Retained earnings	355,537	330,444
Accumulated other comprehensive loss, net of tax	(683)	(2,132)
Total stockholders’ equity	759,203	640,527
Total liabilities and stockholders' equity	$ 7,135,489	$ 6,364,912

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Time certificates of deposit least amount	$ 100,000	$ 100,000
Held to Maturity, Fair Value, Total	$ 455,776,000	$ 379,699,000
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	75,000,000	75,000,000
Common Stock, shares issued	26,212,238	23,998,738
Common Stock, shares outstanding	26,212,238	23,998,738
Common Stock, unvested restricted Stock awards	244,510	254,500
Shares Held in Rabbi Trust	172,214	176,849

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income
Interest and fees on loans	$ 54,557	$ 49,514	$ 160,261	$ 147,111
Taxable interest and dividends on securities	5,455	4,563	14,934	13,903
Nontaxable interest and dividends on securities	31	36	95	110
Interest on loans held for sale	64	159	173	306
Interest on federal funds sold and short-term investments	121	96	212	203
Total interest and dividend income	60,228	54,368	175,675	161,633
Interest expense
Interest on deposits	2,951	2,735	8,636	8,314
Interest on borrowings	2,232	2,070	6,997	7,095
Total interest expense	5,183	4,805	15,633	15,409
Net interest income	55,045	49,563	160,042	146,224
Provision for loan losses	800	1,901	1,000	8,653
Net interest income after provision for loan losses	54,245	47,662	159,042	137,571
Noninterest income
Deposit account fees	4,754	4,656	13,385	13,478
Interchange and ATM fees	3,949	3,375	10,817	9,672
Investment management	4,981	5,016	15,616	14,755
Mortgage banking income	1,480	1,015	3,832	2,379
Loan level derivative income	968	381	2,816	1,452
Increase in cash surrender value of life insurance policies	958	774	2,685	2,217
Gain Realized on Life Insurance Policies	0	0	0	1,964
Available-For-Sale- Securities - Equity - Gross Realized Gains	0	67	19	138
Available-For-Sale Securities - Fixed Income Gross Realized Gains	0	0	798	0
Other noninterest income	2,157	1,814	6,096	5,414
Total noninterest income	19,247	17,098	56,064	51,469
Noninterest expenses
Salaries and employee benefits	26,685	23,651	78,291	69,574
Occupancy and equipment expenses	5,443	5,027	17,509	16,474
Data processing & facilities management	1,112	1,178	3,462	3,609
FDIC assessment	1,020	957	2,993	2,828
Advertising expense	1,414	1,179	4,101	3,252
Consulting expense	867	737	2,451	2,105
Legal Fees	746	547	1,462	1,397
Available-For-Sale Securities - Equity Gross Realized Losses	0	0	8	0
Available-for-Sale Securities - Fixed Income Gross Realized Losses	0	0	1,124	0
Loss on termination of derivatives	0	0	0	1,122
Business Combination, Acquisition Related Costs	0	677	10,501	754
Other noninterest expenses	9,744	8,654	28,750	26,359
Total noninterest expenses	47,031	42,607	150,652	127,474
Income before income taxes	26,461	22,153	64,454	61,566
Provision for income taxes	7,867	6,415	18,949	17,699
Net income	$ 18,594	$ 15,738	$ 45,505	$ 43,867
Basic earnings per share (in dollars per share)	$ 0.71	$ 0.66	$ 1.77	$ 1.84
Diluted earnings per share (in dollars per share)	$ 0.71	$ 0.66	$ 1.76	$ 1.83
Weighted average common shares (basic) (in shares)	26,200,621	23,911,678	25,774,571	23,876,391
Common shares equivalents (in shares)	63,493	90,685	72,921	95,320
Weighted average common shares (diluted) (in shares)	26,264,114	24,002,363	25,847,492	23,971,711
Retained Earnings [Member]
Noninterest expenses
Net income			$ 45,505	$ 43,867
Cash dividends declared per common share (in dollars per share)	$ 0.26	$ 0.24	$ 0.78	$ 0.72

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 18,594	$ 15,738	$ 45,505	$ 43,867
Other comprehensive income (loss), net of tax
Net change in fair value of securities available for sale	1,211	(850)	544	3,462
Net change in fair value of cash flow hedges	132	578	596	2,085
Net change in other comprehensive income for defined benefit postretirement plans	110	(39)	309	(117)
Total other comprehensive income (loss)	1,453	(311)	1,449	5,430
Total comprehensive income	$ 20,047	$ 15,427	$ 46,954	$ 49,297

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Outstanding	Common Stock	Value of Shares Held in Rabbi Trust at Cost	Deferred Compensation and Other Retirement Benefit Obligations	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance September 30, 2015 at Dec. 31, 2013		23,805,984
Balance September 30, 2014 at Dec. 31, 2013	$ 591,540		$ 235	$ (3,404)	$ 3,404	$ 305,179	$ 293,560	$ (7,434)
Net income	43,867						43,867
Other comprehensive income	5,430							5,430
Common dividend declared ($0.78 per share)	(17,201)						(17,201)
Common stock issued for acquisition	0
Proceeds from exercise of stock options, net of cash paid		24,609
Proceeds from exercise of stock options, net of cash paid	583		1			582
Tax benefit related to equity award activity	438					438
Stock based compensation	2,075					2,075
Restricted stock awards issued, net of awards surrendered		55,675
Restricted stock awards issued, net of awards surrendered	(643)		1			(644)
Shares issued under direct stock purchase plan		25,410
Shares issued under direct stock purchase plan	959					959
Deferred compensation and other retirement benefit obligations				(187)	187
Tax benefit related to deferred compensation distributions	134					134
Balance December 31, 2014 at Sep. 30, 2014	$ 627,182		237	(3,591)	3,591	308,723	320,226	(2,004)
Balance December 31, 2013 at Sep. 30, 2014		23,911,678
Balance September 30, 2015 at Dec. 31, 2014	23,998,738	23,998,738
Balance September 30, 2014 at Dec. 31, 2014	$ 640,527		237	(3,666)	3,666	311,978	330,444	(2,132)
Net income	45,505						45,505
Other comprehensive income	1,449							1,449
Common dividend declared ($0.78 per share)	(20,412)						(20,412)
Common stock issued for acquisition		2,052,137
Common stock issued for acquisition	86,415		21			86,394
Proceeds from exercise of stock options, net of cash paid		78,240
Proceeds from exercise of stock options, net of cash paid	1,365		1			1,364
Tax benefit related to equity award activity	776					776
Stock based compensation	2,028					2,028
Restricted stock awards issued, net of awards surrendered		36,901
Restricted stock awards issued, net of awards surrendered	(645)		1			(646)
Shares issued under direct stock purchase plan		46,222
Shares issued under direct stock purchase plan	2,023					2,023
Deferred compensation and other retirement benefit obligations				(217)	217
Tax benefit related to deferred compensation distributions	172					172
Balance December 31, 2014 at Sep. 30, 2015	$ 759,203		$ 260	$ (3,883)	$ 3,883	$ 404,089	$ 355,537	$ (683)
Balance December 31, 2013 at Sep. 30, 2015	26,212,238	26,212,238

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Retained Earnings
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.26	$ 0.24	$ 0.78	$ 0.72

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 45,505	$ 43,867
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	9,327	9,182
Provision for loan losses	1,000	8,653
Deferred income tax expense	5,372	459
Net (gain) loss on sale of securities	315	(138)
Net loss on fixed assets	213	505
Gain (Loss) on Sale of Derivatives	0	1,122
Net loss on other real estate owned and foreclosed assets	1,070	361
Realized gain on sale leaseback transaction	(775)	(775)
Stock based compensation	2,028	2,075
Excess tax benefit related to equity award activity	(776)	(438)
Increase in cash surrender value of life insurance policies	(2,685)	(2,213)
Gain Realized on Life Insurance Policies	0	(1,964)
Change in fair value on loans held for sale	(3)	(1)
Net change in
Trading assets	(454)	0
Loans held for sale	(4,585)	(3,697)
Other assets	4,314	11,156
Increase (Decrease) in Other Operating Liabilities	2,209	(792)
Total adjustments	16,570	23,495
Net cash provided by operating activities	62,075	67,362
Cash flows used in investing activities
Proceeds from sales of securities available for sale	14,344	945
Proceeds from maturities and principal repayments of securities available for sale	60,507	35,936
Purchases of securities available for sale	(49,086)	(36,577)
Proceeds from maturities and principal repayments of securities held to maturity	44,706	32,864
Purchases of securities held to maturity	(117,286)	(54,681)
Redemption of Federal Home Loan Bank stock		6,693
Investments in low income housing projects	(14,817)	(13,660)
Purchases of life insurance policies	(115)	(10,116)
Proceeds from life insurance policies	0	6,309
Net increase in loans	(65,650)	(242,207)
Cash used in business combinations, net of cash acquired	(13,448)	0
Purchases of bank premises and equipment	(6,846)	(5,987)
Proceeds from the sale of bank premises and equipment	1,233	1,064
Payments on early termination of hedging relationship		(1,122)
Proceeds from the sale of other real estate owned and foreclosed assets	7,378	4,269
Net capital improvements to other real estate owned	(961)	(1,772)
Net cash used in investing activities	(140,041)	(278,042)
Cash flows provided by financing activities
Net decrease in time deposits	(54,293)	(71,164)
Net increase in other deposits	326,440	387,180
Net repayments of short-term Federal Home Loan Bank borrowings	(10,000)	(75,000)
Repayments of long-term Federal Home Loan Bank borrowings	(7,000)	(5,000)
Net increase (decrease) in customer repurchase agreements	(9,441)	3,904
Increase (Decrease) in Payables under Repurchase Agreements	(50,000)	0
Net decrease in other short term borrowings		(5,000)
Repayments of subordinated debentures	(30,000)	0
Net proceeds from exercise of stock options	1,365	583
Restricted stock awards issued, net of awards surrendered	(645)	(643)
Excess tax benefit from stock based compensation	776	438
Tax benefit from deferred compensation distribution	172	134
Proceeds from shares issued under direct stock purchase plan	2,023	959
Common dividends paid	(19,357)	(16,704)
Net cash provided by financing activities	150,040	219,687
Net increase in cash and cash equivalents	72,074	9,007
Cash and cash equivalents at beginning of year	178,254	216,325
Cash and cash equivalents at end of period	250,328	225,332
Supplemental schedule of noncash investing and financing activities
Real Estate Owned, Transfer from Real Estate Owned	2,134	5,039
Other net transfers to other real estate owned	142
Net increase in capital commitments relating to low income housing project investments	2,085	27,839
Common stock issued for acquisition	86,415	$ 0
Fair value of assets acquired, net of cash acquired	598,376
Fair value of liabilities assumed	$ 498,513

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION Independent Bank Corp. (the “Company”) is a state chartered, federally registered bank holding company, incorporated in 1985. The Company is the sole stockholder of Rockland Trust Company (“Rockland Trust” or the “Bank”), a Massachusetts trust company chartered in 1907. All material intercompany balances and transactions have been eliminated in consolidation. Certain previously reported amounts may have been reclassified to conform to the current year’s presentation. The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation of the financial statements, primarily consisting of normal recurring adjustments, have been included. Operating results for the quarter ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 or any other interim period. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 , filed with the Securities and Exchange Commission.

Recent Accounting Standards

Recent Accounting Standards	9 Months Ended
	Sep. 30, 2015
Recent Accounting Standards [Abstract]
RECENT ACCOUNTING STANDARDS	FASB ASC Topic 805 "Business Combinations" Update No. 2015-16. Update No. 2015-16 was issued in September 2015, requiring an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in this Update require that the acquirer record, in the same period's financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting has been completed at the acquisition date. Additionally, an entity is required to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public entities, the amendments in this update are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been issued. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Subtopic 835-30 "Interest-Imputation of Interest" Update No. 2015-15. Update No. 2015-15 was issued in August 2015 due to the guidance in Updated 2015-03 not addressing presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. Given the absence of authoritative guidance within Update 2015-03 for debt issuance costs related to line-of-credit arrangements, the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Topic 606 "Revenue from Contracts with Customers" Update No. 2015-14. Update No. 2015-14 was issued in August 2015 to defer the effective date of Updated 2014-09 for all entities by one year. Public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance in Updated 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Earlier adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company is currently assessing the potential impact of this amendment on the Company's consolidated financial position. FASB ASC Topic 805 "Business Combinations - Pushdown Accounting" Update No. 2015-08. Update No. 2015-08 was issued in May 2015 to remove references and to amend certain previously issued pushdown accounting guidance. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Subtopic 350-40 "Intangibles - Goodwill and Other - Internal - Use Software" Update No. 2015-05. Update No. 2015-05 was issued in April 2015 to provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance will not change current accounting for service contracts. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Subtopic 835-30 "Interest - Imputation of Interest" Update No. 2015-03. Update No. 2015-03 was issued in April 2015 to simplify presentation of debt issuance costs. The amendments in this Update require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuances costs are not affected by the amendments in this Update. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Topic 810 "Consolidation" Update No. 2015-02. Update No. 2015-02 was issued in February 2015 to respond to stakeholders' concerns about the current accounting for consolidation of certain legal entities. The amendments in this Update affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. All legal entities are subject to reevaluation under the revised consolidation model. Specifically, the amendments: (1) modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities, (2) eliminate the presumption that a general partner should consolidate a limited partnership, (3) affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships, and (4) provide a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position. FASB ASC Subtopic 225-20 "Income Statement - Extraordinary and Unusual Items" Update No. 2015-01. Update No. 2015-01 was issued in January 2015 to simplify the income statement presentation requirements in Subtopic 225-20 by eliminating the concept of extraordinary items. Extraordinary items are events and transactions that are distinguished by their unusual nature and by the infrequency of their occurrence. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial position.

ACQUISITIONS

ACQUISITIONS	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	ACQUISITIONS Peoples Federal Bancshares, Inc. On February 20, 2015, the Company completed its acquisition of Peoples Federal Bancshares, Inc. ("Peoples"), the parent of Peoples Federal Saving Bank. The transaction qualified as a tax-free reorganization for federal income tax purposes and Peoples shareholders received, for each share of Peoples common stock, the right to receive either $21.00 in cash per share or 0.5523 shares of the Company's stock (valued at $23.26 per share, based upon the highest trading value of the Company's stock on February 20, 2015 of $42.11 ). The total deal consideration was $141.8 million and was comprised of 40% cash and 60% stock consideration. The cash consideration was $55.4 million in the aggregate, inclusive of cash paid in lieu of fractional shares. The total stock consideration was $86.4 million and resulted in an increase to the Company's outstanding shares of 2,052,137 shares. The Company accounted for the acquisition using the acquisition method pursuant to the Business Combinations Topic of the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC"). Accordingly, the Company recorded merger and acquisition expenses of $10.5 million during the nine months ended September 30, 2015. There were no merger and acquisition expenses during the three months ended September 30, 2015. Additionally, the acquisition method requires the acquirer to recognize the assets acquired and the liabilities assumed at their fair values as of the acquisition date. The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition: Net Assets Acquired at Fair Value (Dollars in thousands) Assets Cash $ 41,957 Investments 43,585 Loans 463,927 Premises and equipment 9,346 Goodwill 30,662 Core deposit and other intangibles 3,936 Other assets 46,920 Total assets acquired 640,333 Liabilities Deposits 432,250 Borrowings 51,209 Other liabilities 15,054 Total liabilities assumed 498,513 Purchase price $ 141,820 Fair value adjustments to assets acquired and liabilities assumed are generally amortized using either an effective yield or straight-line basis over periods consistent with the average life, useful life and/or contractual term of the related assets and liabilities. Fair values of the major categories of assets acquired and liabilities assumed were determined as follows: Cash and Cash Equivalents The fair values of cash and cash equivalents approximate the respective carrying amounts because the instruments are payable on demand or have short-term maturities. Investments The fair values of securities were based on quoted market prices for identical securities received from an independent, nationally-recognized, third-party pricing service. Prices provided by the independent pricing service were based on recent trading activity and other observable information including, but not limited to, market interest rate curves, referenced credit spreads and estimated prepayment rates where applicable. Loans The loans acquired were recorded at fair value without a carryover of the allowance for loan losses. Fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected, as adjusted for an estimate of future credit losses and prepayments, and then applying a market-based discount rate to those cash flows. The overall discount on the loans acquired in this transaction was due to anticipated credit loss, as well as considerations for liquidity and market interest rates. A portion of the loans acquired showed evidence of deterioration of credit quality at the purchase date and it was deemed unlikely that the Company will be able to collect all contractually required payments. As such, these loans were deemed to be purchased credit impaired ("PCI") and the carrying value and prospective income recognition are predicated upon future cash flows expected to be collected. The following is a summary of these PCI loans associated with the acquisition as of the date acquired: (Dollars in thousands) Contractually required principal and interest at acquisition $ 4,358 Contractual cash flows not expected to be collected (1,596 ) Expected cash flows at acquisition 2,762 Interest component of expected cash flows (319 ) Basis in PCI loans at acquisition - estimated fair value $ 2,443 Premises and Equipment The fair value of the premises, including land, buildings and improvements, was determined based upon appraisals by licensed real estate appraisers or pending agreed upon sale prices. The appraisals were based upon the best and highest use of the property with final values determined based upon an analysis of the cost, sales comparison and income capitalization approaches for each property appraised. Core Deposit Intangible The fair value of the core deposit intangible is derived by comparing the interest rate and servicing costs that the financial institution pays on the core deposit liability versus the current market rate for alternative sources of financing, while factoring in estimates over the remaining life and attrition rate of the deposit accounts. The intangible asset represents the stable and relatively low cost source of funds that the deposits and accompanying relationships provide the Company, when compared to alternative funding sources. Deposits The fair value of acquired savings and transaction deposit accounts was assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. The fair value of time deposits were determined based on the present value of the contractual cash flows over the remaining period to maturity using a market interest rate. Borrowings The fair values of Federal Home Loan Bank ("FHLB") advances were derived based upon the present value of the principal and interest payments using a current market discount rate. Selected Pro Forma Results The following summarizes the unaudited pro forma results of operations as if the Company acquired Peoples on January 1, 2015 (2014 amounts represent combined results for the Company and Peoples). The selected pro forma financial information is presented for illustrative purposes only and is not necessarily indicative of the financial results of the combined companies had the acquisition actually been completed at the beginning of the periods presented, nor does it indicate future results for any other interim or full-year period. Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Net interest income after provision for loan losses $ 54,245 $ 52,089 $ 161,700 $ 150,878 Net income 18,594 15,590 50,360 44,772 Excluded from the pro forma results of operations for the nine months ended September 30, 2015 are merger-related costs of $16.7 million recognized by both the Company and Peoples in the aggregate. There were no merger and acquisition expenses recognized during the three months ended September 30, 2015. These costs were primarily made up of contract terminations arising due to the change in control, the acceleration of certain compensation and benefit costs, and other merger expenses.

Securities

Securities	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES Trading Securities As of September 30, 2015 , the Company had trading securities of $454,000 . These securities are held in a rabbi trust and will be used for future payments associated with the Company’s non-qualified 401(k) Restoration Plan and non-qualified deferred compensation plan. Available for Sale and Held to Maturity Securities The following table presents a summary of the amortized cost, gross unrealized holding gains and losses, other-than-temporary impairment recorded in other comprehensive income and fair value of securities available for sale and securities held to maturity for the periods below: September 30, 2015 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Dollars in thousands) Available for sale securities U.S. government agency securities $ 36,895 $ 692 $ — $ 37,587 $ 41,369 $ 139 $ (22 ) $ 41,486 Agency mortgage-backed securities 206,778 6,247 (104 ) 212,921 211,168 7,203 (693 ) 217,678 Agency collateralized mortgage obligations 51,868 611 (404 ) 52,075 63,059 599 (623 ) 63,035 State, county, and municipal securities 4,557 114 — 4,671 5,106 117 — 5,223 Single issuer trust preferred securities issued by banks 2,877 9 (45 ) 2,841 2,913 12 (16 ) 2,909 Pooled trust preferred securities issued by banks and insurers (1) 2,226 — (640 ) 1,586 7,906 195 (1,780 ) 6,321 Small business administration pooled securities 41,018 155 (17 ) 41,156 — — — — Equity securities 13,200 245 (490 ) 12,955 11,572 567 (237 ) 11,902 Total available for sale securities $ 359,419 $ 8,073 $ (1,700 ) $ 365,792 $ 343,093 $ 8,832 $ (3,371 ) $ 348,554 Held to maturity securities U.S. Treasury securities $ 1,009 $ 75 $ — $ 1,084 $ 1,010 $ 63 $ — $ 1,073 Agency mortgage-backed securities 172,684 5,718 — 178,402 159,522 5,422 — 164,944 Agency collateralized mortgage obligations 230,820 2,769 (1,679 ) 231,910 198,220 1,842 (3,478 ) 196,584 State, county, and municipal securities 225 4 — 229 424 4 — 428 Single issuer trust preferred securities issued by banks 1,500 — (4 ) 1,496 1,500 — (23 ) 1,477 Small business administration pooled securities 36,901 712 — 37,613 9,775 299 — 10,074 Corporate debt securities 5,000 42 — 5,042 5,002 117 — 5,119 Total held to maturity securities $ 448,139 $ 9,320 $ (1,683 ) $ 455,776 $ 375,453 $ 7,747 $ (3,501 ) $ 379,699 Total $ 807,558 $ 17,393 $ (3,383 ) $ 821,568 $ 718,546 $ 16,579 $ (6,872 ) $ 728,253 (1) Gross unrealized gains and gross unrealized losses include $230,000 of a net loss on non-credit related other-than-temporary impairment ("OTTI") at December 31, 2014 . There was no non-credit related OTTI at September 30, 2015 . When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Equity securities classified as available for sale: Gross realized gains $ — $ 67 $ 19 $ 138 Gross realized losses — — (8 ) — Net realized gain on equity securities $ — $ 67 $ 11 $ 138 Fixed income securities classified as available for sale: Gross realized gains $ — $ — $ 798 $ — Gross realized losses — — (1,124 ) — Net realized loss on fixed income securities $ — $ — $ (326 ) $ — The actual maturities of certain securities may differ from the contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. A schedule of the contractual maturities of securities available for sale and securities held to maturity as of September 30, 2015 is presented below: Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ — $ — $ 5,225 $ 5,271 Due after one year to five years 42,709 43,495 118 120 Due after five to ten years 81,841 83,361 29,013 29,954 Due after ten years 221,669 225,981 413,783 420,431 Total debt securities $ 346,219 $ 352,837 $ 448,139 $ 455,776 Equity securities $ 13,200 $ 12,955 $ — $ — Total $ 359,419 $ 365,792 $ 448,139 $ 455,776 Inclusive in the table above is $25.1 million of callable securities in the Company’s investment portfolio at September 30, 2015 . The carrying value of securities pledged to secure public funds, trust deposits, repurchase agreements and for other purposes, as required or permitted by law, was $322.6 million and $340.0 million at September 30, 2015 and December 31, 2014 , respectively. At September 30, 2015 and December 31, 2014 , the Company had no investments in obligations of individual states, counties, or municipalities which exceeded 10% of stockholders’ equity . Other-Than-Temporary Impairment ("OTTI") The Company continually reviews investment securities for the existence of OTTI, taking into consideration current market conditions, the extent and nature of changes in fair value, issuer rating changes and trends, the credit worthiness of the obligor of the security, volatility of earnings, current analysts’ evaluations, the Company’s intent to sell the security, or whether it is more likely than not that the Company will be required to sell the debt security before its anticipated recovery, as well as other qualitative factors. The term “other-than-temporary” is not intended to indicate that the decline is permanent, but indicates that the prospects for a near-term recovery of value is not necessarily favorable, or that there is a lack of evidence to support a realizable value equal to or greater than the carrying value of the investment. The following tables show the gross unrealized losses and fair value of the Company’s investments in an unrealized loss position, which the Company has not deemed to be OTTI, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: September 30, 2015 Less than 12 months 12 months or longer Total # of holdings Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Dollars in thousands) Agency mortgage-backed securities 8 $ 6,886 $ (18 ) $ 4,515 $ (86 ) $ 11,401 $ (104 ) Agency collateralized mortgage obligations 12 16,667 (135 ) 85,255 (1,948 ) 101,922 (2,083 ) Single issuer trust preferred securities issued by banks and insurers 3 2,541 (15 ) 1,039 (34 ) 3,580 (49 ) Pooled trust preferred securities issued by banks and insurers 1 — — 1,586 (640 ) 1,586 (640 ) Small business administration pooled securities 1 11,982 (17 ) — — 11,982 (17 ) Equity securities 33 2,627 (178 ) 5,018 (312 ) 7,645 (490 ) Total temporarily impaired securities 58 $ 40,703 $ (363 ) $ 97,413 $ (3,020 ) $ 138,116 $ (3,383 ) December 31, 2014 Less than 12 months 12 months or longer Total # of holdings Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Dollars in thousands) U.S.government agency securities 22 $ 21,950 $ (22 ) $ — $ — $ 21,950 $ (22 ) Agency mortgage-backed securities 17 3,471 (1 ) 42,222 (692 ) 45,693 (693 ) Agency collateralized mortgage obligations 14 35,083 (331 ) 94,974 (3,770 ) 130,057 (4,101 ) Single issuer trust preferred securities issued by banks and insurers 2 2,553 (39 ) — — 2,553 (39 ) Pooled trust preferred securities issued by banks and insurers 2 — — 2,681 (1,356 ) 2,681 (1,356 ) Equity securities 23 1,480 (74 ) 4,072 (163 ) 5,552 (237 ) Total temporarily impaired securities 80 $ 64,537 $ (467 ) $ 143,949 $ (5,981 ) $ 208,486 $ (6,448 ) The Company does not intend to sell these investments and has determined based upon available evidence that it is more likely than not that the Company will not be required to sell the security before the recovery of its amortized cost basis. As a result, the Company does not consider these investments to be OTTI. The Company made this determination by reviewing various qualitative and quantitative factors regarding each investment category, such as current market conditions, extent and nature of changes in fair value, issuer rating changes and trends, volatility of earnings, and current analysts’ evaluations. As a result of the Company’s review of these qualitative and quantitative factors, the causes of the impairments listed in the table above by category are as follows at September 30, 2015 : • Agency Mortgage-Backed Securities, Agency Collateralized Mortgage Obligations and Small Business Administration Pooled Securities: These portfolios have contractual terms that generally do not permit the issuer to settle the securities at a price less than the current par value of the investment. The decline in market value of these securities is attributable to changes in interest rates and not credit quality. Additionally, these securities carry the implicitly or, in some cases the explicit guarantee of the U.S. Government or one of its agencies. • Single Issuer Trust Preferred Securities: This portfolio consists of three securities, one of which is below investment grade. The unrealized loss on these securities is attributable to the illiquid nature of the trust preferred market in the current economic environment. Management evaluates various financial metrics for the issuers, including regulatory capital ratios of the issuers. • Pooled Trust Preferred Securities: This portfolio consists of one below investment grade security which is performing. The unrealized loss on this security is attributable to the illiquid nature of the trust preferred market and the significant risk premiums required in the current economic environment. Management evaluates collateral credit and instrument structure, including current and expected deferral and default rates and timing. In addition, discount rates are determined by evaluating comparable spreads observed currently in the market for similar instruments. • Equity Securities : This portfolio consists of mutual funds and other equity investments. During some periods, the mutual funds in the Company’s investment portfolio may have unrealized losses resulting from market fluctuations as well as the risk premium associated with that particular asset class. For example, emerging market equities tend to trade at a higher risk premium than U.S. government bonds and thus, will fluctuate to a greater degree on both the upside and the downside. In the context of a well-diversified portfolio, however, the correlation amongst the various asset classes represented by the funds serves to minimize downside risk. The Company evaluates each mutual fund in the portfolio regularly and measures performance on both an absolute and relative basis. A reasonable recovery period for positions with an unrealized loss is based on management’s assessment of general economic data, trends within a particular asset class, valuations, earnings forecasts and bond durations. The following table shows the total OTTI that the Company recorded for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Gross change in OTTI recorded on certain investments $ — $ 235 $ 84 $ 1,264 Portion of OTTI recognized in OCI — (235 ) (84 ) (1,264 ) Total credit related OTTI recognized in earnings $ — $ — $ — $ — The following table shows the cumulative credit related component of OTTI for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Balance at beginning of period $ — $ (9,997 ) $ (9,997 ) $ (9,997 ) Add Incurred on securities not previously impaired — — — — Incurred on securities previously impaired — — — — Less Securities sold during the period — — 9,997 — Reclassification due to changes in Company's intent — — — — Increases in cash flow expected to be collected — — — — Balance at end of period $ — $ (9,997 ) $ — $ (9,997 )

Loans, Allowance for Loan Losse

Loans, Allowance for Loan Losses and Credit Quality	9 Months Ended
	Sep. 30, 2015
Loans, Allowance for Loan Losses and Credit Quality [Abstract]
LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY	LOANS, ALLOWANCE FOR LOAN LOSSES, AND CREDIT QUALITY The following tables bifurcate the amount of loans and the allowance allocated to each loan category based on the type of impairment analysis as of the periods indicated: September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Financing receivables ending balance: Collectively evaluated for impairment $ 856,916 $ 2,618,612 $ 307,908 $ 91,307 $ 627,031 $ 901,863 $ 15,330 $ 5,418,967 Individually evaluated for impairment $ 5,596 $ 29,506 $ 306 $ 971 $ 15,247 $ 5,777 $ 611 $ 58,014 Purchased credit impaired loans $ — $ 11,224 $ — $ — $ 9,659 $ 254 $ 3 $ 21,140 Total loans by group $ 862,512 $ 2,659,342 $ 308,214 $ 92,278 $ 651,937 $ 907,894 $ 15,944 $ 5,498,121 (1 ) December 31, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Financing receivables ending balance: Collectively evaluated for impairment $ 856,185 $ 2,304,099 $ 265,501 $ 84,159 $ 505,799 $ 858,305 $ 16,335 $ 4,890,383 Individually evaluated for impairment $ 4,654 $ 30,729 $ 311 $ 1,088 $ 15,055 $ 5,330 $ 868 $ 58,035 Purchased credit impaired loans $ — $ 12,495 $ 182 $ — $ 9,405 $ 228 $ 5 $ 22,315 Total loans by group $ 860,839 $ 2,347,323 $ 265,994 $ 85,247 $ 530,259 $ 863,863 $ 17,208 $ 4,970,733 (1 ) (1) The amount of net deferred costs included in the ending balance was $4.0 million and $2.8 million at September 30, 2015 and December 31, 2014 , respectively. The following tables summarize changes in allowance for loan losses by loan category for the periods indicated: Three Months Ended September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,279 $ 26,359 $ 4,071 $ 1,248 $ 2,551 $ 4,871 $ 616 $ 54,995 Charge-offs (497 ) (28 ) — (2 ) (40 ) (249 ) (349 ) (1,165 ) Recoveries 22 152 — 57 6 130 208 575 Provision (benefit) (518 ) 582 422 (20 ) 75 128 131 800 Ending balance $ 14,286 $ 27,065 $ 4,493 $ 1,283 $ 2,592 $ 4,880 $ 606 $ 55,205 Three Months Ended September 30, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,929 $ 25,095 $ 3,757 $ 1,154 $ 2,879 $ 4,969 $ 755 $ 54,538 Charge-offs (504 ) (691 ) — (73 ) (199 ) (160 ) (279 ) (1,906 ) Recoveries 6 57 — 29 178 67 135 472 Provision (benefit) 91 1,248 356 45 (36 ) 71 126 1,901 Ending balance $ 15,522 $ 25,709 $ 4,113 $ 1,155 $ 2,822 $ 4,947 $ 737 $ 55,005 Nine Months Ended September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,573 $ 25,873 $ 3,945 $ 1,171 $ 2,834 $ 4,956 $ 748 $ 55,100 Charge-offs (1,531 ) (236 ) — (198 ) (242 ) (659 ) (922 ) (3,788 ) Recoveries 903 1,006 — 189 52 234 509 2,893 Provision (benefit) (659 ) 422 548 121 (52 ) 349 271 1,000 Ending balance $ 14,286 $ 27,065 $ 4,493 $ 1,283 $ 2,592 $ 4,880 $ 606 $ 55,205 Ending balance: individually evaluated for impairment $ 252 $ 225 $ — $ 28 $ 1,313 $ 245 $ 27 $ 2,090 Ending balance: collectively evaluated for impairment $ 14,034 $ 26,840 $ 4,493 $ 1,255 $ 1,279 $ 4,635 $ 579 $ 53,115 Nine Months Ended September 30, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,622 $ 24,541 $ 3,371 $ 1,215 $ 2,760 $ 5,036 $ 694 $ 53,239 Charge-offs (1,757 ) (4,273 ) — (469 ) (653 ) (562 ) (908 ) (8,622 ) Recoveries 213 322 — 168 368 215 449 1,735 Provision (benefit) 1,444 5,119 742 241 347 258 502 8,653 Ending balance $ 15,522 $ 25,709 $ 4,113 $ 1,155 $ 2,822 $ 4,947 $ 737 $ 55,005 Ending balance: individually evaluated for impairment $ 541 $ 315 $ — $ 10 $ 1,521 $ 269 $ 43 $ 2,699 Ending balance: collectively evaluated for impairment $ 14,981 $ 25,394 $ 4,113 $ 1,145 $ 1,301 $ 4,678 $ 694 $ 52,306 For the purpose of estimating the allowance for loan losses, management segregates the loan portfolio into the portfolio segments detailed in the above tables. Each of these loan categories possesses unique risk characteristics that are considered when determining the appropriate level of allowance for each segment. Some of the risk characteristics unique to each loan category include: Commercial Portfolio • Commercial and Industrial : Loans in this category consist of revolving and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and/or capital investment. Collateral generally consists of pledges of business assets including, but not limited to: accounts receivable, inventory, plant & equipment, or real estate, if applicable. Repayment sources consist of primarily, operating cash flow, and secondarily, liquidation of assets. • Commercial Real Estate : Loans in this category consist of mortgage loans to finance investment in real property such as multi-family residential, commercial/retail, office, industrial, hotels, educational and healthcare facilities and other specific use properties. Loans are typically written with amortizing payment structures. Collateral values are determined based upon third party appraisals and evaluations. Loan to value ratios at origination are governed by established policy and regulatory guidelines. Repayment sources consist of primarily, cash flow from operating leases and rents, and secondarily, liquidation of assets. • Commercial Construction : Loans in this category consist of short-term construction loans, revolving and nonrevolving credit lines and construction/permanent loans to finance the acquisition, development and construction or rehabilitation of real property. Project types include residential 1-4 family, condominium and multi-family homes, commercial/retail, office, industrial, hotels, educational and healthcare facilities and other specific use properties. Loans may be written with nonamortizing or hybrid payment structures depending upon the type of project. Collateral values are determined based upon third party appraisals and evaluations. Loan to value ratios at origination are governed by established policy and regulatory guidelines. Repayment sources vary depending upon the type of project and may consist of sale or lease of units, operating cash flows or liquidation of other assets. • Small Business: Loans in this category consist of revolving, term loan and mortgage obligations extended to sole proprietors and small businesses for purposes of financing working capital and/or capital investment. Collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, plant & equipment, or real estate if applicable. Repayment sources consist primarily of operating cash flows, and secondarily, liquidation of assets. For the commercial portfolio it is the Company’s policy to obtain personal guarantees for payment from individuals holding material ownership interests of the borrowing entities. Consumer Portfolio • Residential Real Estate : Residential mortgage loans held in the Company’s portfolio are made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors such as current and expected income, employment status, current assets, other financial resources, credit history and the value of the collateral. Collateral consists of mortgage liens on 1-4 family residential properties. The Company does not originate or purchase sub-prime loans. • Home Equity : Home equity loans and lines are made to qualified individuals and are secured by senior or junior mortgage liens on owner-occupied 1-4 family homes, condominiums or vacation homes or on nonowner occupied 1-4 family homes with more restrictive loan to value requirements. The home equity loan has a fixed rate and is billed in equal payments comprised of principal and interest. The home equity line of credit has a variable rate and is billed in interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the principal balance plus all accrued interest. Additionally, the Company has the option of renewing the line of credit for additional draw periods. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan to value ratios within established policy guidelines. • Other Consumer: Other consumer loan products include personal lines of credit and amortizing loans made to qualified individuals for various purposes such as education, auto loans, debt consolidation, personal expenses or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. These loans may be secured or unsecured. Credit Quality The Company continually monitors the asset quality of the loan portfolio using all available information. 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 (“TDR”). The Company reviews numerous credit quality indicators when assessing the risk in its loan portfolio. For the commercial portfolio, the Company utilizes a 10-point commercial risk-rating system, which assigns a risk-grade to each borrower based on a number of quantitative and qualitative factors associated with a commercial 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. The risk-ratings categories are defined as follows: • 1- 6 Rating — Pass: Risk-rating grades “1” through “6” comprise those loans ranging from ‘Substantially Risk Free’ which indicates borrowers are of unquestioned credit standing and the pinnacle of credit quality, well established companies with a very strong financial condition, and loans fully secured by cash collateral, through ‘Acceptable Risk’, which indicates borrowers may exhibit declining earnings, strained cash flow, increasing leverage and/or weakening market fundamentals that indicate above average or below average asset quality, margins and market share. Collateral coverage is protective. • 7 Rating — Potential Weakness: Borrowers exhibit potential credit weaknesses or downward trends deserving management’s close 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. • 8 Rating — Definite Weakness Loss Unlikely: Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt. Loan may be inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. Normal repayment from the borrower is in jeopardy, although no loss of principal is envisioned. However, 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. • 9 Rating — Partial Loss Probable: 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. • 10 Rating — Definite Loss: Borrowers deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuation as active assets of the Company is not warranted. The credit quality of the commercial loan portfolio is actively monitored and any changes in credit quality are reflected in risk-rating changes. Risk-ratings are assigned or reviewed for all new loans, when advancing significant additions to existing relationships (over $50,000 ), at least quarterly for all actively managed loans, and any time a significant event occurs, including at renewal of the loan. The Company utilizes a comprehensive strategy for monitoring commercial credit quality. Borrowers are required to provide updated financial information at least annually which is carefully evaluated for any changes in credit quality. Larger loan relationships are subject to a full annual credit review by an experienced credit analysis group. Additionally, the Company retains an independent loan review firm to evaluate the credit quality of the commercial loan portfolio. The independent loan review process achieves significant penetration into the commercial loan portfolio and reports the results of these reviews to the Audit Committee of the Board of Directors on a quarterly basis. The following table details the amount of outstanding principal balances relative to each of the risk-rating categories for the Company’s commercial portfolio: September 30, 2015 Category Risk Rating Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Total (Dollars in thousands) Pass 1 - 6 $ 796,556 $ 2,504,079 $ 297,405 $ 88,793 $ 3,686,833 Potential weakness 7 45,609 93,609 10,280 2,666 152,164 Definite weakness-loss unlikely 8 20,272 60,421 529 735 81,957 Partial loss probable 9 75 1,233 — 84 1,392 Definite loss 10 — — — — — Total $ 862,512 $ 2,659,342 $ 308,214 $ 92,278 $ 3,922,346 December 31, 2014 Category Risk Rating Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Total (Dollars in thousands) Pass 1 - 6 $ 801,578 $ 2,196,109 $ 248,696 $ 81,255 $ 3,327,638 Potential weakness 7 37,802 82,372 15,464 2,932 138,570 Definite weakness-loss unlikely 8 20,241 67,571 1,834 949 90,595 Partial loss probable 9 1,218 1,271 — 111 2,600 Definite loss 10 — — — — — Total $ 860,839 $ 2,347,323 $ 265,994 $ 85,247 $ 3,559,403 For the Company’s consumer portfolio, the quality of the loan is best indicated by the repayment performance of an individual borrower. However, the Company does supplement performance data with current Fair Isaac Corporation (“FICO”) scores and Loan to Value (“LTV”) estimates. Current FICO data is purchased and appended to all consumer loans on a quarterly basis. In addition, automated valuation services and broker opinions of value are used to supplement original value data for the residential and home equity portfolios, periodically. The following table shows the weighted average FICO scores and the weighted average combined LTV ratios as of the periods indicated below: September 30, December 31, Residential portfolio FICO score (re-scored)(1) 741 739 LTV (re-valued)(2) 60.8 % 67.1 % Home equity portfolio FICO score (re-scored)(1) 765 764 LTV (re-valued)(2) 50.9 % 53.6 % (1) The average FICO scores for September 30, 2015 are based upon rescores available from August 31, 2015 and origination score data for loans booked between September 1, 2015 and September 30, 2015. The average FICO scores for December 31, 2014 are based upon rescores available from November 30, 2014 and origination score data for loans booked between December 1, 2014 and December 31, 2014. (2) The combined LTV ratios for September 30, 2015 are based upon updated automated valuations as of March 31, 2015 and origination value data for loans booked between April 1, 2015 and September 30, 2015. The combined LTV ratios for December 31, 2014 are based upon updated automated valuations as of February 28, 2013 and actual score data for loans booked from March 1, 2013 through December 31, 2014. For home equity loans and lines in a subordinate lien position, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines. The Company’s philosophy toward managing its loan portfolios is predicated upon careful monitoring, which stresses early detection and response to delinquent and default situations. Delinquent loans are managed by a team of seasoned collection specialists and the Company seeks to make arrangements to resolve any delinquent or default situation over the shortest possible time frame. As a general rule, loans more than 90 days past due with respect to principal or interest are classified as nonaccrual loans. As permitted by banking regulations, certain consumer loans 90 days or more past due may continue to accrue interest. The Company also may use discretion regarding other loans over 90 days delinquent if the loan is well secured and in process of collection. Set forth below is information regarding the Company’s nonaccrual, delinquent, TDRs, and impaired loans at the period shown. The following table shows nonaccrual loans at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Commercial and industrial $ 4,114 $ 2,822 Commercial real estate 8,699 7,279 Commercial construction 307 311 Small business 159 246 Residential real estate 9,106 8,697 Home equity 7,142 8,038 Other consumer 40 — Total nonaccrual loans(1) $ 29,567 $ 27,393 (1) Included in these amounts were $5.2 million of nonaccruing TDRs at both September 30, 2015 and December 31, 2014 , respectively. The following table shows information regarding foreclosed residential real estate property at the date indicated: September 30, 2015 (Dollars in thousands) Foreclosed residential real estate property held by the creditor $ 1,700 Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure $ 1,465 The following table shows the age analysis of past due financing receivables as of the dates indicated: September 30, 2015 30-59 days 60-89 days 90 days or more Total Past Due Total Financing Receivables Recorded Investment >90 Days and Accruing Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Current (Dollars in thousands) Loan Portfolio Commercial and industrial 6 $ 383 3 $ 920 10 $ 3,334 19 $ 4,637 $ 857,875 $ 862,512 $ — Commercial real estate 6 1,222 4 746 16 4,769 26 6,737 2,652,605 2,659,342 — Commercial construction — — — — 1 306 1 306 307,908 308,214 — Small business 8 27 4 44 10 105 22 176 92,102 92,278 — Residential real estate 12 1,620 9 1,760 23 4,096 44 7,476 644,461 651,937 — Home equity 27 1,770 13 769 14 1,295 54 3,834 904,060 907,894 — Other consumer (1) 308 262 9 16 13 33 330 311 15,633 15,944 — Total 367 $ 5,284 42 $ 4,255 87 $ 13,938 496 $ 23,477 $ 5,474,644 $ 5,498,121 $ — December 31, 2014 30-59 days 60-89 days 90 days or more Total Past Due Total Financing Receivables Recorded Investment >90 Days and Accruing Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Current (Dollars in thousands) Loan Portfolio Commercial and industrial 18 $ 3,192 10 $ 1,007 19 $ 2,320 47 $ 6,519 $ 854,320 $ 860,839 $ — Commercial real estate 19 13,428 6 1,480 16 4,225 41 19,133 2,328,190 2,347,323 — Commercial construction 1 506 — — 1 311 2 817 265,177 265,994 — Small business 7 21 8 113 7 173 22 307 84,940 85,247 — Residential real estate 13 1,670 10 1,798 36 4,826 59 8,294 521,965 530,259 106 Home equity 20 1,559 7 307 23 2,402 50 4,268 859,595 863,863 — Other consumer (1) 318 382 16 23 15 15 349 420 16,788 17,208 13 Total 396 $ 20,758 57 $ 4,728 117 $ 14,272 570 $ 39,758 $ 4,930,975 $ 4,970,733 $ 119 (1) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances. In the course of resolving nonperforming loans, the Company may choose to restructure the contractual terms of certain loans. The Company attempts to work out an alternative payment schedule with the borrower in order to avoid foreclosure actions. Any loans that are modified are reviewed by the Company to identify if a TDR has occurred, which is when, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession to the borrower that it would not otherwise consider. Terms may be modified to fit the ability of the borrower to repay in line with its current financial status and the restructuring of the loan may include the transfer of assets from the borrower to satisfy the debt, a modification of loan terms, or a combination of the two. The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) TDRs on accrual status $ 37,477 $ 38,382 TDRs on nonaccrual 5,201 5,248 Total TDRs $ 42,678 $ 43,630 Amount of specific reserves included in the allowance for loan losses associated with TDRs $ 1,681 $ 2,004 Additional commitments to lend to a borrower who has been a party to a TDR $ 1,366 $ 1,400 The Company’s policy is to have any restructured loan which is on nonaccrual status prior to being modified remain on nonaccrual status for six months, subsequent to being modified, before management considers its return to accrual status. If the restructured loan is on accrual status prior to being modified, it is reviewed to determine if the modified loan should remain on accrual status. Additionally, loans classified as TDRs are adjusted to reflect the changes in value of the recorded investment in the loan, if any, resulting from the granting of a concession. For all residential loan modifications, the borrower must perform during a 90 day trial period before the modification is finalized. The following table shows the modifications which occurred during the periods indicated and the change in the recorded investment subsequent to the modifications occurring: Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (Dollars in thousands) Troubled debt restructurings Commercial and industrial 1 $ 100 $ 100 10 $ 1,153 $ 1,153 Commercial real estate 1 653 653 6 2,963 2,963 Small business 2 103 103 7 269 269 Residential real estate 2 218 245 5 376 403 Home equity 1 36 36 4 251 251 Total 7 $ 1,110 $ 1,137 32 $ 5,012 $ 5,039 Three Months Ended Nine Months Ended September 30, 2014 September 30, 2014 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (Dollars in thousands) Troubled debt restructurings Commercial and industrial 3 $ 193 $ 193 12 $ 744 $ 744 Commercial real estate 5 2,095 2,095 13 4,225 4,225 Small business — — — 1 58 58 Residential real estate 1 156 158 8 1,388 1,419 Home equity 2 55 55 9 781 781 Other consumer — — — 1 8 8 Total 11 $ 2,499 $ 2,501 44 $ 7,204 $ 7,235 (1) The post-modification balances represent the legal principal balance of the loan on the date of modification. These amounts may show an increase when modifications include a capitalization of interest. The following table shows the Company’s post-modification balance of TDRs listed by type of modification during the period indicated: Three Months Ended September 30 Nine Months Ended September 30 2015 2014 2015 2014 (Dollars in thousands) (Dollars in thousands) Extended maturity $ 855 $ 1,902 $ 2,204 $ 3,403 Adjusted interest rate — — — 726 Combination rate and maturity 246 599 2,769 2,269 Court ordered concession 36 — 66 837 Total $ 1,137 $ 2,501 $ 5,039 $ 7,235 The Company considers a loan to have defaulted when it reaches 90 days past due. The following table shows loans that have been modified during the past twelve months which have subsequently defaulted during the periods indicated: Three Months Ended September 30 2015 2014 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (Dollars in thousands) Troubled debt restructurings that subsequently defaulted Commercial and industrial — — 1 46 Residential real estate — — 1 87 — $ — 2 $ 133 Nine Months Ended September 30 2015 2014 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (Dollars in thousands) Troubled debt restructurings that subsequently defaulted Commercial real estate 2 $ 880 — $ — Commercial and industrial 3 339 1 46 Residential real estate — — 3 214 5 $ 1,219 4 $ 260 All TDR loans are considered impaired and therefore are subject to a specific review for impairment. The impairment analysis appropriately discounts the present value of the anticipated cash flows by the loan’s contractual rate of interest in effect prior to the loan’s modification. The amount of impairment, if any, is recorded as a specific loss allocation to each individual loan in the allowance for loan losses. Commercial loans (commercial and industrial, commercial construction, commercial real estate and small business loans), residential loans, and home equity loans that have been classified as TDRs and which subsequently default are reviewed to determine if the loan should be deemed collateral dependent. In such an instance, any shortfall between the value of the collateral and the carrying value of the loan is determined by measuring the recorded investment in the loan against the fair value of the collateral less estimated costs to sell. The Company charges off the amount of any confirmed loan loss in the period when the loans, or portion of loans, are deemed uncollectible. Smaller balance consumer TDR loans are reviewed for performance to determine when a charge-off is appropriate. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The tables below set forth information regarding the Company’s impaired loans by loan portfolio at the dates indicated: September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 2,041 $ 2,193 $ — Commercial real estate 13,740 14,835 — Commercial construction 306 308 — Small business 458 494 — Residential real estate 3,555 3,658 — Home equity 4,564 4,631 — Other consumer 195 196 — Subtotal 24,859 26,315 — With an allowance recorded Commercial and industrial $ 3,555 $ 3,641 $ 252 Commercial real estate 15,766 15,938 225 Small business 513 543 28 Residential real estate 11,692 12,806 1,313 Home equity 1,213 1,359 245 Other consumer 416 430 27 Subtotal 33,155 34,717 2,090 Total $ 58,014 $ 61,032 $ 2,090 December 31, 2014 Recorded Investment Unpaid Principal Balance Related Allowance (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 3,005 $ 3,278 $ — Commercial real estate 15,982 17,164 — Commercial construction 311 311 — Small business 692 718 — Residential real estate 2,439 2,502 — Home equity 4,169 4,221 — Other consumer 338 341 — Subtotal 26,936 28,535 — With an allowance recorded Commercial and industrial $ 1,649 $ 1,859 $ 412 Commercial real estate 14,747 15,514 197 Small business 396 458 7 Residential real estate 12,616 13,727 1,500 Home equity 1,161 1,264 262 Other consumer 530 530 38 Subtotal 31,099 33,352 2,416 Total $ 58,035 $ 61,887 $ 2,416 The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated: Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 2,080 $ 11 $ 2,204 $ 41 Commercial real estate 13,876 89 14,433 337 Commercial construction 307 — 309 — Small business 465 4 484 14 Residential real estate 3,566 42 3,601 123 Home equity 4,585 44 4,670 134 Other consumer 198 4 207 12 Subtotal 25,077 194 25,908 661 With an allowance recorded Commercial and industrial $ 3,687 $ 10 $ 3,894 $ 57 Commercial real estate 15,830 204 15,993 609 Small business 540 7 564 22 Residential real estate 11,698 106 11,764 358 Home equity 1,221 4 1,238 13 Other consumer 421 4 443 11 Subtotal 33,397 335 33,896 1,070 Total $ 58,474 $ 529 $ 59,804 $ 1,731 Three Months Ended Nine Months Ended September 30, 2014 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 4,411 $ 47 $ 4,743 $ 155 Commercial real estate 16,517 154 17,098 492 Small business 840 8 889 25 Residential real estate 2,806 34 2,836 71 Home equity 4,405 45 4,456 136 Other consumer 365 5 382 19 Subtotal 29,655 293 30,715 904 With an allowance recorded Commercial and industrial $ 3,889 $ 24 $ 4,285 $ 98 Commercial real estate 17,509 233 17,674 700 Small business 427 7 452 22 Residential real estate 12,841 106 12,959 324 Home equity 1,111 4 1,124 15 Other consumer 625 5 656 17 Subtotal 36,402 379 37,150 1,176 Total $ 66,057 $ 672 $ 67,865 $ 2,080 Certain loans acquired by the Company may have shown evidence of deterioration of credit quality since origination and it was therefore deemed unlikely that the Company would be able to collect all contractually required payments. As such, these loans were deemed to be PCI loans and the carrying value and prospective income recognition are predicated upon future cash flows expected to be collected. The following table displays certain information pertaining to PCI loans at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Outstanding balance $ 23,877 $ 25,279 Carrying amount $ 21,140 $ 22,315 The following table summarizes activity in the accretable yield for the PCI loan portfolio: Three Months Ended September 30 Nine Months Ended September 30 2015 2014 2015 2014 (Dollars in thousands) Beginning balance $ 2,527 $ 3,845 $ 2,974 $ 2,514 Acquisition — — 319 — Accretion (592 ) (667 ) (2,138 ) (1,722 ) Other change in expected cash flows (1) 278 380 978 2,572 Reclassification from nonaccretable difference for loans which have paid off (2) 218 — 298 194 Ending balance $ 2,431 $ 3,558 $ 2,431 $ 3,558 (1) Represents changes in cash flows expected to be collected and resulting in increased interest income as a prospective yield adjustment over the remaining life of the loan(s). (2) Results in increased interest income during the period in which the loan paid off at amount greater than originally expected.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Earnings per share consisted of the following components for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands, except share and per share data) Net income $ 18,594 $ 15,738 $ 45,505 $ 43,867 Weighted Average Shares Basic shares 26,200,621 23,911,678 25,774,571 23,876,391 Effect of dilutive securities 63,493 90,685 72,921 95,320 Diluted shares 26,264,114 24,002,363 25,847,492 23,971,711 Net income per share Basic EPS $ 0.71 $ 0.66 $ 1.77 $ 1.84 Effect of dilutive securities — — (0.01 ) (0.01 ) Diluted EPS $ 0.71 $ 0.66 $ 1.76 $ 1.83 There were no anti-dilutive options to purchase common stock or shares of performance-based restricted stock that were excluded from the calculation of diluted earnings per share during the three or nine months ended September 30, 2015 and 2014 .

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK BASED COMPENSATION	Time Vested Restricted Stock Awards During the nine months ended September 30, 2015 , the Company made the following awards of restricted stock: Date Shares Granted Plan Grant Date Fair Value Vesting Period 2/11/2015 31,500 2005 Employee Stock Plan $ 39.42 Ratably over 5 years from grant date 2/12/2015 25,910 2005 Employee Stock Plan $ 40.03 Ratably over 5 years from grant date 3/19/2015 3,800 2005 Employee Stock Plan $ 43.56 Ratably over 5 years from grant date 4/27/2015 625 2005 Employee Stock Plan $ 41.61 At the end of 3 years from grant date 4/27/2015 1,875 2005 Employee Stock Plan $ 41.61 At the end of 5 years from grant date 5/27/2015 8,800 2010 Non-Employee Director Stock Plan $ 45.02 At the end of 5 years from grant date 7/14/2015 800 2010 Non-Employee Director Stock Plan $ 47.82 Once on May 27, 2020 The fair value of the restricted stock awards is based upon the average of the high and low price at which the Company’s common stock traded on the date of grant. The holders of restricted stock awards participate fully in the rewards of stock ownership of the Company, including voting and dividend rights. Performance-Based Restricted Stock Awards On February 12, 2015, the Company granted 21,780 performance-based restricted stock awards to certain executive level employees. These performance-based restricted stock awards were issued from the 2005 Employee Stock Plan and were determined to have a grant date fair value per share of $40.03 . The number of shares to be vested will be contingent upon the Company's attainment of certain performance measures outlined in the award agreement and will be measured as of the end of the three year performance period, or December 31, 2017. These awards will be accounted for as equity awards due to the nature of these awards and the fact that these shares will not be settled in cash. The fair value of the performance-based restricted stock awards, assuming achievement at target, is based upon the average of the high and low price at which the Company’s common stock traded on the date of grant. The holders of these awards are not entitled to receive dividends or vote until the shares are vested. Stock Options The Company did not issue any awards of options to purchase shares of common stock during the nine months ended September 30, 2015 .

Repurchase Agreements Disclosur

Repurchase Agreements Disclosure of Repurchase Agreements (Notes)	9 Months Ended
	Sep. 30, 2015
Repurchase Agreements [Abstract]
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	REPURCHASE AGREEMENTS The Company can raise additional liquidity by entering into repurchase agreements at its discretion. In a security repurchase agreement transaction, the Company will generally sell a security, agreeing to repurchase either the same or substantially identical security on a specified later date, at a greater price than the original sales price. The difference between the sale price and purchase price is the cost of the proceeds, which is recorded as interest expense. The securities underlying the agreements are delivered to counterparties as security for the repurchase obligations. Since the securities are treated as collateral and the agreement does not qualify for a full transfer of effective control, the transactions does not meet the criteria to be classified as a sale, and is therefore considered a secured borrowing transaction for accounting purposes. Payments on such borrowings are interest only until the scheduled repurchase date. In a repurchase agreement the Company is subject to the risk that the purchaser may default at maturity and not return the securities underlying the agreements. In order to minimize this potential risk, the Company either deals with established firms when entering into these transactions or with customers whose agreements stipulate that the securities underlying the agreement are not delivered to the customer and instead are held in segregated safekeeping accounts by the Company's safekeeping agents. The table below sets forth information regarding the Company’s repurchase agreements allocated by source of collateral at the date indicated: September 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total (Dollars in thousands) Sources of Collateral U.S. government agency securities $ 10,148 $ — $ — $ — $ 10,148 Agency mortgage-backed securities 68,601 — — — 68,601 Agency collateralized mortgage obligations 59,700 — — — 59,700 Total borrowings $ 138,449 $ — $ — $ — $ 138,449 Certain counterparties monitor collateral, and may request additional collateral to be posted from time to time. For further information regarding the Company's repurchase agreements see Note 10 - Balance Sheet Offsetting .

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING ACTIVITIES	The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally to manage the Company’s interest rate risk. Additionally, the Company enters into interest rate derivatives and foreign exchange contracts to accommodate the business requirements of its customers (“customer related positions”). The Company minimizes the market and liquidity risks of customer related positions by entering into similar offsetting positions with broker-dealers. Derivative instruments are carried at fair value in the Company’s financial statements. The accounting for changes in the fair value of a derivative instrument is dependent upon whether or not it qualifies as a hedge for accounting purposes, and further, by the type of hedging relationship. The Company does not enter into proprietary trading positions for any derivatives. Interest Rate Positions The Company currently utilizes interest rate swap agreements as hedging instruments against interest rate risk associated with the Company’s borrowings. An interest rate swap is an agreement whereby one party agrees to pay a floating rate of interest on a notional principal amount in exchange for receiving a fixed rate of interest on the same notional amount, for a predetermined period of time, from a second party. The amounts relating to the notional principal amount are not actually exchanged. The maximum length of time over which the Company is currently hedging its exposure to the variability in future cash flows for forecasted transactions related to the payment of variable interest on existing financial instruments is three years. The following table reflects the Company’s derivative positions for the periods indicated below for interest rate swaps which qualify as cash flow hedges for accounting purposes: September 30, 2015 Notional Amount Trade Date Effective Date Maturity Date Receive (Variable) Index Current Rate Received Pay Fixed Swap Rate Fair Value (Dollars in thousands) $ 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.34 % 5.04 % $ (1,409 ) 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.34 % 5.04 % (1,409 ) 25,000 9-Dec-08 10-Dec-08 10-Dec-18 3 Month LIBOR 0.33 % 2.94 % (1,537 ) $ 75,000 $ (4,355 ) December 31, 2014 Notional Amount Trade Date Effective Date Maturity Date Receive (Variable) Index Current Rate Received Pay Fixed Swap Rate Fair Value (Dollars in thousands) $ 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.24 % 5.04 % $ (2,093 ) 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.24 % 5.04 % (2,094 ) 25,000 9-Dec-08 10-Dec-08 10-Dec-18 3 Month LIBOR 0.24 % 2.94 % (1,383 ) $ 75,000 $ (5,570 ) For derivative instruments that are designated and qualify as cash flow hedging instruments, the effective portion of the gains or losses is reported as a component of other comprehensive income ("OCI"), and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The Company expects approximately $2.7 million (pre-tax) to be reclassified to interest expense from OCI related to the Company’s cash flow hedges in the next twelve months. This reclassification is due to anticipated payments that will be made and/or received on the swaps based upon the forward curve as of September 30, 2015 . For both the three and nine month periods ended September 30, 2015 and 2014 the Company recognized $61,000 and $183,000 , respectively, of net amortization income that was an offset to interest expense related to previously terminated swaps . The Company had no fair value hedges as of September 30, 2015 or December 31, 2014 . Customer Related Positions Loan level derivatives, primarily interest rate swaps, offered to commercial borrowers through the Company’s loan level derivative program do not qualify as hedges for accounting purposes. The Company believes that its exposure to commercial customer derivatives is limited because these contracts are simultaneously matched at inception with an offsetting dealer transaction. The commercial customer derivative program allows the Company to retain variable-rate commercial loans while allowing the customer to synthetically fix the loan rate by entering into a variable-to-fixed interest rate swap. Foreign exchange contracts offered to commercial borrowers through the Company’s derivative program do not qualify as hedges for accounting purposes. The Company acts as a seller and buyer of foreign exchange contracts to accommodate its customers. To mitigate the market and liquidity risk associated with these derivatives, the Company enters into similar offsetting positions. The following table reflects the Company’s customer related derivative positions for the periods indicated below for those derivatives not designated as hedging: Notional Amount Maturing Number of Positions (1) Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value September 30, 2015 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 176 $ 63,287 $ 19,527 $ 42,008 $ 92,501 $ 435,087 $ 652,410 $ 29,205 Pay fixed, receive variable 170 $ 63,287 $ 19,527 $ 42,008 $ 92,501 $ 435,087 $ 652,410 $ (29,202 ) Foreign exchange contracts Buys foreign currency, sells U.S. currency 29 $ 35,732 $ — $ — $ — $ — $ 35,732 $ 332 Buys U.S. currency, sells foreign currency 29 $ 35,732 $ — $ — $ — $ — $ 35,732 $ (304 ) December 31, 2014 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 174 $ 88,147 $ 46,854 $ 40,958 $ 38,108 $ 403,208 $ 617,275 $ 17,840 Pay fixed, receive variable 168 $ 88,147 $ 46,854 $ 40,958 $ 38,108 $ 403,208 $ 617,275 $ (17,837 ) Foreign exchange contracts Buys foreign currency, sells U.S. currency 23 $ 57,112 $ — $ — $ — $ — $ 57,112 $ 3,983 Buys U.S. currency, sells foreign currency 23 $ 57,112 $ — $ — $ — $ — $ 57,112 $ (3,960 ) (1) The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements. Mortgage Derivatives Prior to closing and funding certain 1- 4 family residential mortgage loans, an interest rate lock commitment is generally extended to the borrower. During the period from commitment date to closing date, the Company is subject to the risk that market rates of interest may change. If market rates rise, investors generally will pay less to purchase such loans resulting in a reduction in the gain on sale of the loans or, possibly, a loss. In an effort to mitigate such risk, forward delivery sales commitments are executed, under which the Company agrees to deliver whole mortgage loans to various investors. In addition, the Company may also enter into additional forward To Be Announced ("TBA") mortgage contracts, also considered derivative instruments, which are purchased by the Company from a diversified list of counterparties in order to hedge customer rate locks. These forward contracts carry a market price that has a strong inverse relationship to that of mortgage prices. When the Company locks a rate to the customer, the rate can be held for the benefit of the customer for a certain period of time until the mortgage is sold. During that time, the Company may not have agreed on a price with a mortgage investor and fluctuations in market conditions may cause the mortgage to lose market value. Within a short period after the rate is locked with the customer, the Company may, depending upon the effectiveness of existing hedges, execute a forward TBA trade with a counterparty to hedge that market risk. Certain assumptions, including pull through rates and rate lock periods, are used in managing the existing and future hedges. The effectiveness of the economic hedges rely on the accuracy of these assumptions. The change in fair value on the interest rate lock commitments, forward delivery sale commitments, and forward TBA mortgage contracts are recorded in current period earnings as a component of mortgage banking income. In addition, the Company has elected the fair value option to carry loans held for sale at fair value. The change in fair value of loans held for sale is recorded in current period earnings as a component of mortgage banking income in accordance with the Company's fair value election. The change in fair value associated with loans held for sale was a decrease of $181,000 and $223,000 for the three months ended September 30, 2015 and 2014 , respectively, and an increase of $3,000 and $1,000 for the nine months ended September 30, 2015 and 2014 , respectively. These amounts were offset in earnings by the change in the fair value of mortgage derivatives. The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the balance sheet at the periods indicated: Asset Derivatives Liability Derivatives Fair Value at Fair Value at Fair Value at Fair Value at Balance Sheet September 30, 2015 December 31, 2014 Balance Sheet September 30, 2015 December 31, 2014 (Dollars in thousands) Derivatives designated as hedges Interest rate derivatives Other assets $ — $ — Other liabilities $ 4,355 $ 5,570 Derivatives not designated as hedges Customer Related Positions Loan level derivatives Other assets $ 29,205 $ 18,383 Other liabilities $ 29,202 $ 18,380 Foreign exchange contracts Other assets 662 4,007 Other liabilities 634 3,984 Mortgage Derivatives Interest rate lock commitments Other assets 209 295 Other liabilities — — Forward TBA mortgage contracts Other assets — — Other liabilities — 16 Forward sales agreements Other assets 140 3 Other liabilities — — $ 30,216 $ 22,688 $ 29,836 $ 22,380 Total $ 30,216 $ 22,688 $ 34,191 $ 27,950 The table below presents the effect of the Company’s derivative financial instruments included in OCI and current earnings for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Derivatives designated as hedges Gain in OCI on derivatives (effective portion), net of tax $ 132 $ 578 $ 596 $ 2,085 Loss reclassified from OCI into interest expense (effective portion) $ (715 ) $ (726 ) $ (2,130 ) $ (2,937 ) Loss reclassified from OCI into noninterest expense (loss on termination) $ — $ — $ — $ (1,122 ) Loss recognized in income on derivatives (ineffective portion & amount excluded from effectiveness testing) Interest expense $ — $ — $ — $ — Other expense — — — — Total $ — $ — $ — $ — Derivatives not designated as hedges Changes in fair value of customer related positions Other income $ 39 $ 10 $ 56 $ 54 Other expense — (1 ) (51 ) (3 ) Changes in fair value of mortgage derivatives Mortgage banking income 174 42 $ 67 $ 43 Total $ 213 $ 51 $ 72 $ 94 By using derivatives, the Company is exposed to credit risk to the extent that counterparties to the derivative contracts do not perform as required. Should a counterparty fail to perform under the terms of a derivative contract, the Company's credit exposure on interest rate swaps is limited to the net positive fair value and accrued interest of all swaps with each counterparty. The Company seeks to minimize counterparty credit risk through credit approvals, limits, monitoring procedures, and obtaining collateral, where appropriate. Institutional counterparties must have an investment grade credit rating and be approved by the Company's Board of Directors. As such, management believes the risk of incurring credit losses on derivative contracts with those counterparties is remote and losses, if any, would be immaterial. The Company had no exposure at September 30, 2015 and $272,000 in exposure relating to institutional counterparties at December 31, 2014 . The Company’s exposure relating to customer counterparties was approximately $30.0 million and $18.9 million at September 30, 2015 and December 31, 2014 , respectively. Credit exposure may be reduced by the amount of collateral pledged by the counterparty.

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2015
Offsetting [Abstract]
Balance Sheet Offsetting Disclosure [Text Block]	The Company does not offset fair value amounts recognized for derivative instruments or repurchase agreements. The Company does net the amount recognized for the right to reclaim cash collateral against the obligation to return cash collateral arising from derivative instruments executed with the same counterparty under a master netting arrangement. Collateral legally required to be maintained at dealer banks by the Company is monitored and adjusted as necessary. At September 30, 2015 , it was determined that no additional collateral would have to be posted to immediately settle these instruments. The following tables present the Company's asset and liability derivative positions and the potential effect of netting arrangements on its financial position, as of the periods indicated: Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts Recognized in the Statement of Financial Position Gross Amounts Offset in the Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Financial Instruments Collateral Pledged (Received) Net Amount September 30, 2015 (Dollars in thousands) Derivative Assets Interest rate swaps $ — $ — $ — $ — $ — $ — Loan level derivatives 29,205 — 29,205 — — 29,205 Customer foreign exchange contracts 662 — 662 — — 662 $ 29,867 $ — $ 29,867 $ — $ — $ 29,867 Derivative Liabilities Interest rate swaps $ 4,355 $ — $ 4,355 $ — $ 4,355 $ — Loan level derivatives 29,202 — 29,202 — 29,202 — Customer foreign exchange contracts 634 — 634 — — 634 Repurchase agreements Customer repurchase agreements 138,449 — 138,449 — 138,449 — $ 172,640 $ — $ 172,640 $ — $ 172,006 $ 634 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts Recognized in the Statement of Financial Position Gross Amounts Offset in the Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Financial Instruments (1) Collateral Pledged (Received) Net Amount December 31, 2014 (Dollars in thousands) Derivative Assets Interest rate swaps $ — $ — $ — $ — $ — $ — Loan level derivatives 18,383 — 18,383 272 — 18,111 Customer foreign exchange contracts 4,007 — 4,007 — — 4,007 $ 22,390 $ — $ 22,390 $ 272 $ — $ 22,118 Derivative Liabilities Interest rate swaps $ 5,570 $ — $ 5,570 $ — $ 5,570 $ — Loan level derivatives 18,380 — 18,380 272 17,836 272 Customer foreign exchange contracts 3,984 — 3,984 — — 3,984 Repurchase agreements Customer repurchase agreements 147,890 — 147,890 — 147,890 — Wholesale repurchase agreements 50,000 — 50,000 — 50,000 — $ 225,824 $ — $ 225,824 $ 272 $ 221,296 $ 4,256 (1) Reflects offsetting derivative positions with the same counterparty. The Company has agreements with certain of its derivative counterparties that contain a provision where if the Company fails to maintain its status as a well capitalized institution, then the Company could be required to terminate any outstanding derivatives with the counterparty. All liability position interest rate swap and customer loan level swap counterparties have credit-risk contingent features as of the dates indicated in the table above. In addition, derivative instruments that contain credit-risk related contingent features that are in a net liability position require the Company to assign collateral as noted in the table above.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	Fair value is a market-based measure considered from the perspective of a market participant rather than an entity-specific measure. Therefore, even when market assumptions are not readily available, the Company’s own assumptions are set to reflect those that market participants would use in pricing the asset or liability at the measurement date. If there has been a significant decrease in the volume and level of activity for the asset or liability, regardless of the valuation technique(s) used, the objective of a fair value measurement remains the same. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. The Company uses prices and inputs that are current as of the measurement date. In periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This condition could cause an instrument to be reclassified from one level to another. The Fair Value Measurements and Disclosures Topic of the FASB ASC defines fair value and establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under the Fair Value Measurements and Disclosures Topic of the FASB ASC are described below: Level 1 – Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 – Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation Techniques There have been no changes in the valuation techniques used during the current period. Securities: Trading Securities These equity securities are valued based on market quoted prices. These securities are categorized in Level 1 as they are actively traded and no valuation adjustments have been applied. U.S. Government Agency Securities Fair value is estimated using either multi-dimensional spread tables or benchmarks. The inputs used include benchmark yields, reported trades, and broker/dealer quotes. These securities are classified as Level 2. Agency Mortgage-Backed Securities Fair value is estimated using either a matrix or benchmarks. The inputs used include benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. These securities are categorized as Level 2. Agency Collateralized Mortgage Obligations and Small Business Administration Pooled Securities The valuation model for these securities is volatility-driven and ratings based, and uses multi-dimensional spread tables. The inputs used include benchmark yields, reported trades, new issue data, broker dealer quotes, and collateral performance. If there is at least one significant model assumption or input that is not observable, these securities are categorized as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. State, County, and Municipal Securities The fair value is estimated using a valuation matrix with inputs including bond interest rate tables, recent transaction, and yield relationships. These securities are categorized as Level 2. Single and Pooled Issuer Trust Preferred Securities The fair value of trust preferred securities, including pooled and single issuer preferred securities, is estimated using external pricing models, discounted cash flow methodologies or similar techniques. The inputs used in these valuations include benchmark yields, reported trades, new issue data, broker dealer quotes, and collateral performance. If there is at least one significant model assumption or input that is not observable, these securities are classified as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. Equity Securities These equity securities are valued based on market quoted prices. These securities are classified as Level 1 as they are actively traded and no valuation adjustments have been applied. Loans Held for Sale The Company has elected the fair value option to account for originated closed loans intended for sale. The fair value is measured on an individual loan basis using quoted market prices and when not available, comparable market value or discounted cash flow analysis may be utilized. These assets are typically classified as Level 2. Derivative Instruments Derivatives The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings. Additionally, in conjunction with fair value measurement guidance, the Company has made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio. Although the Company has determined that the majority of the inputs used to value its interest rate derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. However, as of September 30, 2015 and December 31, 2014 , the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified as Level 2. Mortgage Derivatives The fair value of mortgage derivatives is determined based on current market prices for similar assets in the secondary market and, therefore, classified as Level 2 within the fair value hierarchy. Impaired Loans Collateral dependent loans that are deemed to be impaired are valued based upon the lower of cost or fair value of the underlying collateral less costs to sell. The inputs used in the appraisals of the collateral are not always observable, and therefore the loans may be classified as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. Other Real Estate Owned and Other Foreclosed Assets The fair values are generally estimated based upon recent appraisal values of the property less costs to sell the property, as Other Real Estate Owned ("OREO") and Other Foreclosed Assets are valued at the lower of cost or fair value of the property, less estimated costs to sell. Certain inputs used in appraisals are not always observable, and therefore OREO and Other Foreclosed Assets may be classified as Level 3 within the fair value hierarchy. Goodwill and Other Intangible Assets Goodwill and identified intangible assets are subject to impairment testing. The Company conducts an annual impairment test of goodwill in the third quarter of each year, or more frequently if necessary, and other intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. To estimate the fair value of goodwill and, if necessary, other intangible assets, the Company utilizes both a comparable analysis of relevant price multiples in recent market transactions and discounted cash flow analysis. Both valuation models require a significant degree of management judgment. In the event the fair value as determined by the valuation model is less than the carrying value, the intangibles may be impaired. If the impairment testing resulted in impairment, the Company would classify the impaired goodwill and other intangible assets subjected to nonrecurring fair value adjustments as Level 3. Assets and liabilities measured at fair value at the periods indicated were as follows: Fair Value Measurements at Reporting Date Using Balance Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2015 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 454 $ 454 $ — $ — Securities available for sale U.S. Government agency securities 37,587 — 37,587 $ — Agency mortgage-backed securities 212,921 — 212,921 — Agency collateralized mortgage obligations 52,075 — 52,075 — State, county, and municipal securities 4,671 — 4,671 — Single issuer trust preferred securities issued by banks and insurers 2,841 — 2,841 — Pooled trust preferred securities issued by banks and insurers 1,586 — — 1,586 Small business administration pooled securities 41,156 — 41,156 — Equity securities 12,955 12,955 — — Loans held for sale 11,476 — 11,476 — Derivative instruments 30,216 — 30,216 — Liabilities Derivative instruments 34,191 — 34,191 — Total recurring fair value measurements $ 373,747 $ 13,409 $ 358,752 $ 1,586 Nonrecurring fair value measurements Assets Collateral dependent impaired loans $ 6,011 $ — $ — $ 6,011 Other real estate owned and other foreclosed assets 2,532 — — 2,532 Total nonrecurring fair value measurements $ 8,543 $ — $ — $ 8,543 Fair Value Measurements at Reporting Date Using Balance Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2014 (Dollars in thousands) Recurring fair value measurements Assets Securities available for sale U.S. Government agency securities $ 41,486 $ — $ 41,486 $ — Agency mortgage-backed securities 217,678 — 217,678 — Agency collateralized mortgage obligations 63,035 — 63,035 — State, county, and municipal securities 5,223 5,223 Single issuer trust preferred securities issued by banks and insurers 2,909 — 2,909 — Pooled trust preferred securities issued by banks and insurers 6,321 — — 6,321 Equity securities 11,902 11,902 — — Loans held for sale 6,888 — 6,888 — Derivative instruments 22,688 — 22,688 — Liabilities Derivative instruments 27,950 — 27,950 — Total recurring fair value measurements $ 350,180 $ 11,902 $ 331,957 $ 6,321 Nonrecurring fair value measurements: Assets Collateral dependent impaired loans $ 8,196 $ — $ — $ 8,196 Other real estate owned and other foreclosed assets 7,743 — — 7,743 Total nonrecurring fair value measurements $ 15,939 $ — $ — $ 15,939 The table below presents a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3), which were valued using pricing models and discounted cash flow methodologies, as of the dates indicated: Securities Available for Sale: Three Months Ended September 30, 2015 Three Months Ended September 30, 2014 (Dollars in thousands) Pooled Trust Preferred Securities Beginning balance $ 1,595 $ 5,091 Gains and (losses) (realized/unrealized) Included in other comprehensive income 12 318 Settlements (21 ) (23 ) Ending balance $ 1,586 $ 5,386 Securities Available for Sale: Nine Months Ended September 30, 2015 Nine Months Ended September 30, 2014 Pooled Trust Preferred Securities (Dollars in thousands) Beginning balance $ 6,321 $ 3,841 Gains and (losses) (realized/unrealized) Included in other comprehensive income 20 1,666 Sales (4,679 ) — Settlements (76 ) (121 ) Ending balance 1,586 5,386 It is the Company’s policy to recognize the transfers between levels of the fair value hierarchy as of the end of the reporting period. There were no transfers between the levels of the fair value hierarchy for any assets or liabilities measured at fair value on a recurring basis during the nine month periods ended September 30, 2015 or 2014 . The following table sets forth certain unobservable inputs regarding the Company’s investment in securities that are classified as Level 3 for the periods indicated: September 30 December 31 September 30 December 31 September 30 December 31 2015 2014 2015 2014 2015 2014 Valuation Technique Fair Value Unobservable Inputs Range Weighted Average (Dollars in thousands) Discounted cash flow methodology Pooled trust preferred securities $ 1,586 $ 6,321 Cumulative prepayment 0% - 65% 0% - 75% 2.5% 7.0% Cumulative default 5% - 100% 3% - 100% 14.8% 13.9% Loss given default 85% - 100% 85% - 100% 94.2% 96.1% Cure given default 0% - 75% 0% - 75% 63.8% 46.7% Appraisals of collateral (1) Impaired loans $ 6,011 $ 8,196 Other real estate owned and foreclosed assets $ 2,532 $ 7,743 (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable. 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. For the fair value measurements in the table above, which are classified as Level 3 within the fair value hierarchy, the Company’s Treasury and Finance groups determine the valuation policies and procedures. For the pricing of the securities, the Company uses third-party pricing information, without adjustment. Depending on the type of the security, management employs various techniques to analyze the pricing it receives from third parties, such as analyzing changes in market yields and in certain instances reviewing the underlying collateral of the security. 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 their expectation of the market. For the securities whose market is deemed to be inactive and which are categorized as Level 3, the fair value models are calibrated and significant inputs are back tested on a quarterly basis, to the extent possible. This testing is done by the third party service provider, who performs this testing by comparing anticipated inputs to actual results. Significant changes in fair value from period to period are closely scrutinized to ensure fair value models are not flawed. The driver(s) of the respective change in fair value and the method for forecasting the driver(s) is closely considered by management. The significant unobservable inputs used in the fair value measurement of the Company’s pooled trust preferred securities are cumulative prepayment rates, cumulative defaults, loss given defaults and cure given defaults. Significant increases (decreases) in deferrals or defaults, in isolation, would result in a significantly lower (higher) fair value measurement. Alternatively, significant increases (decreases) in cure rates, in isolation, would result in a significantly higher (lower) fair value measurement. Additionally, the Company has certain assets which are marked to fair value on a nonrecurring basis which are categorized within Level 3. These assets include collateral dependent impaired loans and OREO. The determination of the fair value amount is derived from the use of independent third party appraisals and evaluations, prepared by firms from a predetermined list of qualified and approved appraisers or evaluators. Upon receipt of an appraisal or evaluation, the Company's Commercial Real Estate Appraisal Department will review the report for compliance with regulatory and Company standards, as well as reasonableness and acceptance of the value conclusions. Any issues or concerns regarding compliance or value conclusions will be addressed with the engaged firm and the report may be adjusted or revised. If a disagreement cannot be resolved, the Commercial Real Estate Appraisal Department will either address the key issues and modify the report for acceptance or reject the report and re-order a new report. Ultimately, the Company’s Commercial Real Estate Appraisal Department will confirm the collateral value as part of its review process. The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below as of the periods indicated: Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2015 (Dollars in thousands) Financial assets Securities held to maturity(a) U.S. Treasury securities $ 1,009 $ 1,084 $ — $ 1,084 $ — Agency mortgage-backed securities 172,684 178,402 — 178,402 — Agency collateralized mortgage obligations 230,820 231,910 — 231,910 — State, county, and municipal securities 225 229 — 229 — Single issuer trust preferred securities issued by banks 1,500 1,496 — 1,496 — Small business administration pooled securities 36,901 37,613 — 37,613 — Corporate debt securities 5,000 5,042 — 5,042 — Loans, net of allowance for loan losses(b) 5,436,905 5,406,492 — — 5,406,492 Financial liabilities Time certificates of deposits(c) $ 711,263 $ 713,473 $ — $ 713,473 $ — Federal Home Loan Bank borrowings(c) 104,133 104,989 — 104,989 — Customer repurchase agreements and other short-term borrowings(c) 138,449 138,449 — — 138,449 Junior subordinated debentures(d) 73,520 70,925 — 70,925 — Subordinated debentures(c) 35,000 35,282 — — 35,282 Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2014 (Dollars in thousands) Financial assets Securities held to maturity(a) U.S. Treasury securities $ 1,010 $ 1,073 $ — $ 1,073 $ — Agency mortgage-backed securities 159,522 164,944 — 164,944 — Agency collateralized mortgage obligations 198,220 196,584 — 196,584 — State, county, and municipal securities 424 428 — 428 — Single issuer trust preferred securities issued by banks 1,500 1,477 — 1,477 — Small business administration pooled securities 9,775 10,074 — 10,074 — Corporate debt securities 5,002 5,119 — 5,119 — Loans, net of allowance for loan losses(b) 4,907,437 4,875,283 — — 4,875,283 Financial liabilities Time certificates of deposits(c) $ 649,620 $ 651,180 $ — $ 651,180 $ — Federal Home Loan Bank borrowings(c) 70,080 70,208 — 70,208 — Customer repurchase agreements and other short-term borrowings(c) 147,890 147,890 — — 147,890 Wholesale repurchase agreements(c) 50,000 50,510 — — 50,510 Junior subordinated debentures(d) 73,685 70,045 — 70,045 — Subordinated debentures(c) 65,000 64,198 — — 64,198 (a) The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analyses. (b) Fair value is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities or cash flows. (c) Fair value was determined by discounting anticipated future cash payments using rates currently available for instruments with similar remaining maturities. (d) Fair value was determined based upon market prices of securities with similar terms and maturities. This summary excludes financial assets and liabilities for which the carrying value approximates fair value. For financial assets, these include cash and due from banks, federal funds sold, short-term investments, FHLB stock, and cash surrender value of life insurance policies. For financial liabilities, these include demand, savings, money market deposits, and federal funds purchased. These instruments would all be considered to be classified as Level 1 within the fair value hierarchy. Also excluded from the summary are financial instruments measured at fair value on a recurring and nonrecurring basis, as previously described. The Company considers its financial instruments' current use to be the highest and best use of the instruments.

Comprehensive Income_Loss

Comprehensive Income/Loss	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
COMPREHENSIVE INCOME/LOSS	The following table presents a reconciliation of the changes in the components of other comprehensive income (loss) for the dates indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss): Three Months Ended September 30, 2015 Nine Months Ended September 30, 2015 Pre Tax Tax (Expense) After Tax Pre Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ 1,966 $ (755 ) $ 1,211 $ 597 $ (239 ) $ 358 Less: net security losses reclassified into other noninterest income — — — (315 ) 129 (186 ) Net change in fair value of securities available for sale 1,966 (755 ) 1,211 912 (368 ) 544 Change in fair value of cash flow hedges (493 ) 201 (292 ) (1,096 ) 429 (667 ) Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) (715 ) 291 (424 ) (2,130 ) 867 (1,263 ) Net change in fair value of cash flow hedges 222 (90 ) 132 1,034 (438 ) 596 Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 50 (21 ) 29 137 (71 ) 66 Less: amortization of actuarial gains 61 (25 ) 36 182 (74 ) 108 Less: amortization of prior service costs 75 (30 ) 45 227 (92 ) 135 Net change in other comprehensive income for defined benefit postretirement plans (2) 186 (76 ) 110 546 (237 ) 309 Total other comprehensive income $ 2,374 $ (921 ) $ 1,453 $ 2,492 $ (1,043 ) $ 1,449 Three Months Ended September 30, 2014 Nine Months Ended September 30, 2014 Pre Tax Tax (Expense) After Tax Pre Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (1,322 ) $ 512 $ (810 ) $ 5,869 $ (2,325 ) $ 3,544 Less: net security gains reclassified into other noninterest income 67 (27 ) 40 138 (56 ) 82 Net change in fair value of securities available for sale (1,389 ) 539 (850 ) 5,731 (2,269 ) 3,462 Change in fair value of cash flow hedges 252 (103 ) 149 (535 ) 220 (315 ) Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) (726 ) 297 (429 ) (2,937 ) 1,200 (1,737 ) Less: loss on termination of hedge reclassified into noninterest expense — — — (1,122 ) 459 (663 ) Net change in fair value of cash flow hedges 978 (400 ) 578 3,524 (1,439 ) 2,085 Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period (80 ) 32 (48 ) (240 ) 98 (142 ) Less: amortization of actuarial losses (10 ) 5 (5 ) (32 ) 13 (19 ) Less: amortization of prior service costs 26 (11 ) 15 76 (31 ) 45 Less: amortization of transfer obligations (2 ) 1 (1 ) (2 ) 1 (1 ) Net change in other comprehensive income for defined benefit postretirement plans (2) (66 ) 27 (39 ) (198 ) 81 (117 ) Total other comprehensive income (loss) $ (477 ) $ 166 $ (311 ) $ 9,057 $ (3,627 ) $ 5,430 (1) Includes the amortization of the remaining balance of a realized but unrecognized gain, net of tax, from the termination of interest rate swaps in June 2009. The original gain of $1.4 million , net of tax, is being recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain has amortized to $463,000 and $606,000 at September 30, 2015 and 2014 , respectively. (2) The amortization of prior service costs is included in the computation of net periodic pension cost as disclosed in the Employee Benefit Plans footnote in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 , filed with the Securities and Exchange Commission. Information on the Company’s accumulated other comprehensive loss, net of tax, is comprised of the following components as of the periods indicated: Unrealized Gain on Securities Unrealized Loss on Cash Flow Hedge Deferred Gain on Hedge Transactions Defined Benefit Postretirement Plans Accumulated Other Comprehensive Loss (Dollars in thousands) 2015 Beginning balance: January 1, 2015 $ 3,389 $ (3,298 ) $ 571 $ (2,794 ) $ (2,132 ) Net change in other comprehensive income (loss) 544 704 (108 ) 309 1,449 Ending balance: September 30, 2015 $ 3,933 $ (2,594 ) $ 463 $ (2,485 ) $ (683 ) 2014 Beginning balance: January 1, 2014 $ (2,023 ) $ (5,698 ) $ 715 $ (428 ) $ (7,434 ) Net change in other comprehensive income (loss) 3,462 2,194 (109 ) (117 ) 5,430 Ending balance: September 30, 2014 $ 1,439 $ (3,504 ) $ 606 $ (545 ) $ (2,004 )

Commitments and contingencies

Commitments and contingencies	9 Months Ended
	Sep. 30, 2015
Other Commitments [Line Items]
Commitments and Contingencies Disclosure [Text Block]	COMMITMENTS AND CONTINGENCIES Financial Instruments with Off-Balance Sheet Risk In the normal course of business, the Company enters into various transactions to meet the financing needs of its customers, which, in accordance with GAAP, are not included in its consolidated balance sheets. These transactions include commitments to extend credit and standby letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company minimizes its exposure to loss under these commitments by subjecting them to credit approval and monitoring procedures. The Company enters into contractual commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Substantially all of these commitments to extend credit are contingent upon customers maintaining specific credit standards at the time of loan funding. Standby letters of credit are written conditional commitments issued to guarantee the performance of a customer to a third party. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. If the commitment were funded, the Company would be entitled to seek recovery from the customer. The Company’s policies generally require that standby letter of credit arrangements contain security and debt covenants similar to those contained in loan agreements. The fees collected in connection with the issuance of standby letters of credit are representative of the fair value of its obligation undertaken in issuing the guarantee. In accordance with applicable accounting standards related to guarantees, fees collected in connection with the issuance of standby letters of credit are deferred. The fees are then recognized in income proportionately over the life of the standby letter of credit agreement. The deferred standby letter of credit fees represent the fair value of the Company's potential obligations under the standby letter of credit guarantees. The following table summarizes the above financial instruments at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Commitments to extend credit $ 2,011,329 $ 1,822,369 Standby letters of credit 18,834 18,516 Deferred standby letter of credit fees 77 105 Lease Commitments The Company leases office space, space for ATM locations, and certain branch locations under noncancelable operating leases. Rent expense incurred under operating leases was approximately $2.1 million and $1.9 million for the three months ended September 30, 2015 and 2014 , respectively, and $6.1 million and $5.8 million for the nine months ended September 30, 2015 and 2014 , respectively. Renewal options ranging from 1-10 years exist for several of these leases. Rockland Trust had previously entered into a lease with a related party. The terms of that lease were substantially the same as terms for comparable transactions with unrelated parties, and required rent payments of approximately $92,000 and $216,000 for the three and nine months ended September 30, 2014 , respectively. However, there were no such leases for the three and nine months ended September 30, 2015 . There has been no significant change in the future minimum lease payments payable by the Company since December 31, 2014 . See the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2014 for information regarding our leases and other commitments. Other Contingencies At September 30, 2015 , Rockland Trust was involved in pending lawsuits that arose in the ordinary course of business or due to acquisitions. Management has reviewed these pending lawsuits with legal counsel and has taken into consideration the view of counsel as to their outcome. In the opinion of management, the final disposition of pending lawsuits is not expected to have a material adverse effect on the Company’s financial position or results of operations. The Bank is required to maintain certain reserve requirements of vault cash and/or deposits with the Federal Reserve Bank of Boston. The amount of this reserve requirement was $42.0 million and $33.0 million at September 30, 2015 and December 31, 2014 , respectively.

Investments is Low Income Housi

Investments is Low Income Housing Tax Credits Investments in Low Income Housing Tax Credits	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments in Low Income Housing Projects [Text Block]	LOW INCOME HOUSING PROJECT INVESTMENTS The Company has invested in low income housing projects that generate Low Income Housing Tax Credits (“LIHTC”) which provide the Company with tax credits and operating loss tax benefits over a period of approximately 15 years. None of the original investment is expected to be repaid. The investment in LIHTC projects is being accounted for using the proportional amortization method, under which the Company amortizes the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognizes the net investment benefit in the income statement as a component of income tax expense (benefit). The following table presents the Company's investments in low income housing projects as of the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Original investment value $ 42,626 $ 40,541 Current recorded investment 38,929 38,943 Unfunded liability obligation 15,272 28,004 Tax credits and benefits (1) 4,151 1,683 Amortization of investments (2) 2,840 1,089 Net income tax benefit (3) 1,314 594 (1) This amount reflects anticipated tax credits and tax benefits for the full years ended December 31, 2015 and 2014 . (2) The amortization amount reduces the tax credits and benefits anticipated for the full years ended December 31, 2015 and 2014 . (3) This amount represents the net tax benefit expected to be realized for the full years ended December 31, 2015 and 2014 in determining the Company's effective tax rate.

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting Policy	Independent Bank Corp. (the “Company”) is a state chartered, federally registered bank holding company, incorporated in 1985. The Company is the sole stockholder of Rockland Trust Company (“Rockland Trust” or the “Bank”), a Massachusetts trust company chartered in 1907. All material intercompany balances and transactions have been eliminated in consolidation. Certain previously reported amounts may have been reclassified to conform to the current year’s presentation. The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation of the financial statements, primarily consisting of normal recurring adjustments, have been included. Operating results for the quarter ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 or any other interim period. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 , filed with the Securities and Exchange Commission.

ACQUISITIONS (Tables)

ACQUISITIONS (Tables)	9 Months Ended
	Sep. 30, 2015
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition: Net Assets Acquired at Fair Value (Dollars in thousands) Assets Cash $ 41,957 Investments 43,585 Loans 463,927 Premises and equipment 9,346 Goodwill 30,662 Core deposit and other intangibles 3,936 Other assets 46,920 Total assets acquired 640,333 Liabilities Deposits 432,250 Borrowings 51,209 Other liabilities 15,054 Total liabilities assumed 498,513 Purchase price $ 141,820
Summary of Purchased Credit Impaired Loans Associated with the business combination [Table Text Block]	The following is a summary of these PCI loans associated with the acquisition as of the date acquired: (Dollars in thousands) Contractually required principal and interest at acquisition $ 4,358 Contractual cash flows not expected to be collected (1,596 ) Expected cash flows at acquisition 2,762 Interest component of expected cash flows (319 ) Basis in PCI loans at acquisition - estimated fair value $ 2,443
Business Acquisition, Pro Forma Information [Table Text Block]	The selected pro forma financial information is presented for illustrative purposes only and is not necessarily indicative of the financial results of the combined companies had the acquisition actually been completed at the beginning of the periods presented, nor does it indicate future results for any other interim or full-year period. Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Net interest income after provision for loan losses $ 54,245 $ 52,089 $ 161,700 $ 150,878 Net income 18,594 15,590 50,360 44,772

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2015
Gain (Loss) on Investments [Line Items]
Realized Gain (Loss) on Investments [Table Text Block]	When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Equity securities classified as available for sale: Gross realized gains $ — $ 67 $ 19 $ 138 Gross realized losses — — (8 ) — Net realized gain on equity securities $ — $ 67 $ 11 $ 138 Fixed income securities classified as available for sale: Gross realized gains $ — $ — $ 798 $ — Gross realized losses — — (1,124 ) — Net realized loss on fixed income securities $ — $ — $ (326 ) $ —
Reconciliation of fair value of securities	The following table presents a summary of the amortized cost, gross unrealized holding gains and losses, other-than-temporary impairment recorded in other comprehensive income and fair value of securities available for sale and securities held to maturity for the periods below: September 30, 2015 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Dollars in thousands) Available for sale securities U.S. government agency securities $ 36,895 $ 692 $ — $ 37,587 $ 41,369 $ 139 $ (22 ) $ 41,486 Agency mortgage-backed securities 206,778 6,247 (104 ) 212,921 211,168 7,203 (693 ) 217,678 Agency collateralized mortgage obligations 51,868 611 (404 ) 52,075 63,059 599 (623 ) 63,035 State, county, and municipal securities 4,557 114 — 4,671 5,106 117 — 5,223 Single issuer trust preferred securities issued by banks 2,877 9 (45 ) 2,841 2,913 12 (16 ) 2,909 Pooled trust preferred securities issued by banks and insurers (1) 2,226 — (640 ) 1,586 7,906 195 (1,780 ) 6,321 Small business administration pooled securities 41,018 155 (17 ) 41,156 — — — — Equity securities 13,200 245 (490 ) 12,955 11,572 567 (237 ) 11,902 Total available for sale securities $ 359,419 $ 8,073 $ (1,700 ) $ 365,792 $ 343,093 $ 8,832 $ (3,371 ) $ 348,554 Held to maturity securities U.S. Treasury securities $ 1,009 $ 75 $ — $ 1,084 $ 1,010 $ 63 $ — $ 1,073 Agency mortgage-backed securities 172,684 5,718 — 178,402 159,522 5,422 — 164,944 Agency collateralized mortgage obligations 230,820 2,769 (1,679 ) 231,910 198,220 1,842 (3,478 ) 196,584 State, county, and municipal securities 225 4 — 229 424 4 — 428 Single issuer trust preferred securities issued by banks 1,500 — (4 ) 1,496 1,500 — (23 ) 1,477 Small business administration pooled securities 36,901 712 — 37,613 9,775 299 — 10,074 Corporate debt securities 5,000 42 — 5,042 5,002 117 — 5,119 Total held to maturity securities $ 448,139 $ 9,320 $ (1,683 ) $ 455,776 $ 375,453 $ 7,747 $ (3,501 ) $ 379,699 Total $ 807,558 $ 17,393 $ (3,383 ) $ 821,568 $ 718,546 $ 16,579 $ (6,872 ) $ 728,253 (1) Gross unrealized gains and gross unrealized losses include $230,000 of a net loss on non-credit related other-than-temporary impairment ("OTTI") at December 31, 2014 . There was no non-credit related OTTI at September 30, 2015 .
Schedule of contractual maturities of securities	A schedule of the contractual maturities of securities available for sale and securities held to maturity as of September 30, 2015 is presented below: Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ — $ — $ 5,225 $ 5,271 Due after one year to five years 42,709 43,495 118 120 Due after five to ten years 81,841 83,361 29,013 29,954 Due after ten years 221,669 225,981 413,783 420,431 Total debt securities $ 346,219 $ 352,837 $ 448,139 $ 455,776 Equity securities $ 13,200 $ 12,955 $ — $ — Total $ 359,419 $ 365,792 $ 448,139 $ 455,776
Schedule of gross unrealized losses and fair value of investments	The following tables show the gross unrealized losses and fair value of the Company’s investments in an unrealized loss position, which the Company has not deemed to be OTTI, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: September 30, 2015 Less than 12 months 12 months or longer Total # of holdings Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Dollars in thousands) Agency mortgage-backed securities 8 $ 6,886 $ (18 ) $ 4,515 $ (86 ) $ 11,401 $ (104 ) Agency collateralized mortgage obligations 12 16,667 (135 ) 85,255 (1,948 ) 101,922 (2,083 ) Single issuer trust preferred securities issued by banks and insurers 3 2,541 (15 ) 1,039 (34 ) 3,580 (49 ) Pooled trust preferred securities issued by banks and insurers 1 — — 1,586 (640 ) 1,586 (640 ) Small business administration pooled securities 1 11,982 (17 ) — — 11,982 (17 ) Equity securities 33 2,627 (178 ) 5,018 (312 ) 7,645 (490 ) Total temporarily impaired securities 58 $ 40,703 $ (363 ) $ 97,413 $ (3,020 ) $ 138,116 $ (3,383 ) December 31, 2014 Less than 12 months 12 months or longer Total # of holdings Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Dollars in thousands) U.S.government agency securities 22 $ 21,950 $ (22 ) $ — $ — $ 21,950 $ (22 ) Agency mortgage-backed securities 17 3,471 (1 ) 42,222 (692 ) 45,693 (693 ) Agency collateralized mortgage obligations 14 35,083 (331 ) 94,974 (3,770 ) 130,057 (4,101 ) Single issuer trust preferred securities issued by banks and insurers 2 2,553 (39 ) — — 2,553 (39 ) Pooled trust preferred securities issued by banks and insurers 2 — — 2,681 (1,356 ) 2,681 (1,356 ) Equity securities 23 1,480 (74 ) 4,072 (163 ) 5,552 (237 ) Total temporarily impaired securities 80 $ 64,537 $ (467 ) $ 143,949 $ (5,981 ) $ 208,486 $ (6,448 )
Summary of cumulative credit related component of OTTI	The following table shows the total OTTI that the Company recorded for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Gross change in OTTI recorded on certain investments $ — $ 235 $ 84 $ 1,264 Portion of OTTI recognized in OCI — (235 ) (84 ) (1,264 ) Total credit related OTTI recognized in earnings $ — $ — $ — $ — The following table shows the cumulative credit related component of OTTI for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Balance at beginning of period $ — $ (9,997 ) $ (9,997 ) $ (9,997 ) Add Incurred on securities not previously impaired — — — — Incurred on securities previously impaired — — — — Less Securities sold during the period — — 9,997 — Reclassification due to changes in Company's intent — — — — Increases in cash flow expected to be collected — — — — Balance at end of period $ — $ (9,997 ) $ — $ (9,997 )

Loans, Allowance for Loan Los26

Loans, Allowance for Loan Losses and Credit Quality (Tables)	9 Months Ended
	Sep. 30, 2015
Loans, Allowance for Loan Losses and Credit Quality [Abstract]
Tabular disclosure of financing receivables bifurcated by type of impairment evaluation [Table Text Block]	The following tables bifurcate the amount of loans and the allowance allocated to each loan category based on the type of impairment analysis as of the periods indicated: September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Financing receivables ending balance: Collectively evaluated for impairment $ 856,916 $ 2,618,612 $ 307,908 $ 91,307 $ 627,031 $ 901,863 $ 15,330 $ 5,418,967 Individually evaluated for impairment $ 5,596 $ 29,506 $ 306 $ 971 $ 15,247 $ 5,777 $ 611 $ 58,014 Purchased credit impaired loans $ — $ 11,224 $ — $ — $ 9,659 $ 254 $ 3 $ 21,140 Total loans by group $ 862,512 $ 2,659,342 $ 308,214 $ 92,278 $ 651,937 $ 907,894 $ 15,944 $ 5,498,121 (1 ) December 31, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Financing receivables ending balance: Collectively evaluated for impairment $ 856,185 $ 2,304,099 $ 265,501 $ 84,159 $ 505,799 $ 858,305 $ 16,335 $ 4,890,383 Individually evaluated for impairment $ 4,654 $ 30,729 $ 311 $ 1,088 $ 15,055 $ 5,330 $ 868 $ 58,035 Purchased credit impaired loans $ — $ 12,495 $ 182 $ — $ 9,405 $ 228 $ 5 $ 22,315 Total loans by group $ 860,839 $ 2,347,323 $ 265,994 $ 85,247 $ 530,259 $ 863,863 $ 17,208 $ 4,970,733 (1 ) (1) The amount of net deferred costs included in the ending balance was $4.0 million and $2.8 million at September 30, 2015 and December 31, 2014 , respectively.
Summary of changes in allowance for loan losses	The following tables summarize changes in allowance for loan losses by loan category for the periods indicated: Three Months Ended September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,279 $ 26,359 $ 4,071 $ 1,248 $ 2,551 $ 4,871 $ 616 $ 54,995 Charge-offs (497 ) (28 ) — (2 ) (40 ) (249 ) (349 ) (1,165 ) Recoveries 22 152 — 57 6 130 208 575 Provision (benefit) (518 ) 582 422 (20 ) 75 128 131 800 Ending balance $ 14,286 $ 27,065 $ 4,493 $ 1,283 $ 2,592 $ 4,880 $ 606 $ 55,205 Three Months Ended September 30, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,929 $ 25,095 $ 3,757 $ 1,154 $ 2,879 $ 4,969 $ 755 $ 54,538 Charge-offs (504 ) (691 ) — (73 ) (199 ) (160 ) (279 ) (1,906 ) Recoveries 6 57 — 29 178 67 135 472 Provision (benefit) 91 1,248 356 45 (36 ) 71 126 1,901 Ending balance $ 15,522 $ 25,709 $ 4,113 $ 1,155 $ 2,822 $ 4,947 $ 737 $ 55,005 Nine Months Ended September 30, 2015 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,573 $ 25,873 $ 3,945 $ 1,171 $ 2,834 $ 4,956 $ 748 $ 55,100 Charge-offs (1,531 ) (236 ) — (198 ) (242 ) (659 ) (922 ) (3,788 ) Recoveries 903 1,006 — 189 52 234 509 2,893 Provision (benefit) (659 ) 422 548 121 (52 ) 349 271 1,000 Ending balance $ 14,286 $ 27,065 $ 4,493 $ 1,283 $ 2,592 $ 4,880 $ 606 $ 55,205 Ending balance: individually evaluated for impairment $ 252 $ 225 $ — $ 28 $ 1,313 $ 245 $ 27 $ 2,090 Ending balance: collectively evaluated for impairment $ 14,034 $ 26,840 $ 4,493 $ 1,255 $ 1,279 $ 4,635 $ 579 $ 53,115 Nine Months Ended September 30, 2014 (Dollars in thousands) Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Residential Real Estate Home Equity Other Consumer Total Allowance for loan losses Beginning balance $ 15,622 $ 24,541 $ 3,371 $ 1,215 $ 2,760 $ 5,036 $ 694 $ 53,239 Charge-offs (1,757 ) (4,273 ) — (469 ) (653 ) (562 ) (908 ) (8,622 ) Recoveries 213 322 — 168 368 215 449 1,735 Provision (benefit) 1,444 5,119 742 241 347 258 502 8,653 Ending balance $ 15,522 $ 25,709 $ 4,113 $ 1,155 $ 2,822 $ 4,947 $ 737 $ 55,005 Ending balance: individually evaluated for impairment $ 541 $ 315 $ — $ 10 $ 1,521 $ 269 $ 43 $ 2,699 Ending balance: collectively evaluated for impairment $ 14,981 $ 25,394 $ 4,113 $ 1,145 $ 1,301 $ 4,678 $ 694 $ 52,306
Internal risk-rating categories for the Company's commercial portfolio	The following table details the amount of outstanding principal balances relative to each of the risk-rating categories for the Company’s commercial portfolio: September 30, 2015 Category Risk Rating Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Total (Dollars in thousands) Pass 1 - 6 $ 796,556 $ 2,504,079 $ 297,405 $ 88,793 $ 3,686,833 Potential weakness 7 45,609 93,609 10,280 2,666 152,164 Definite weakness-loss unlikely 8 20,272 60,421 529 735 81,957 Partial loss probable 9 75 1,233 — 84 1,392 Definite loss 10 — — — — — Total $ 862,512 $ 2,659,342 $ 308,214 $ 92,278 $ 3,922,346 December 31, 2014 Category Risk Rating Commercial and Industrial Commercial Real Estate Commercial Construction Small Business Total (Dollars in thousands) Pass 1 - 6 $ 801,578 $ 2,196,109 $ 248,696 $ 81,255 $ 3,327,638 Potential weakness 7 37,802 82,372 15,464 2,932 138,570 Definite weakness-loss unlikely 8 20,241 67,571 1,834 949 90,595 Partial loss probable 9 1,218 1,271 — 111 2,600 Definite loss 10 — — — — — Total $ 860,839 $ 2,347,323 $ 265,994 $ 85,247 $ 3,559,403
Weighted average FICO scores and the weighted average combined LTV ratio	The following table shows the weighted average FICO scores and the weighted average combined LTV ratios as of the periods indicated below: September 30, December 31, Residential portfolio FICO score (re-scored)(1) 741 739 LTV (re-valued)(2) 60.8 % 67.1 % Home equity portfolio FICO score (re-scored)(1) 765 764 LTV (re-valued)(2) 50.9 % 53.6 % (1) The average FICO scores for September 30, 2015 are based upon rescores available from August 31, 2015 and origination score data for loans booked between September 1, 2015 and September 30, 2015. The average FICO scores for December 31, 2014 are based upon rescores available from November 30, 2014 and origination score data for loans booked between December 1, 2014 and December 31, 2014. (2) The combined LTV ratios for September 30, 2015 are based upon updated automated valuations as of March 31, 2015 and origination value data for loans booked between April 1, 2015 and September 30, 2015. The combined LTV ratios for December 31, 2014 are based upon updated automated valuations as of February 28, 2013 and actual score data for loans booked from March 1, 2013 through December 31, 2014. For home equity loans and lines in a subordinate lien position, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.
Summary of nonaccrual loans	The following table shows nonaccrual loans at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Commercial and industrial $ 4,114 $ 2,822 Commercial real estate 8,699 7,279 Commercial construction 307 311 Small business 159 246 Residential real estate 9,106 8,697 Home equity 7,142 8,038 Other consumer 40 — Total nonaccrual loans(1) $ 29,567 $ 27,393 (1) Included in these amounts were $5.2 million of nonaccruing TDRs at both September 30, 2015 and December 31, 2014 , respectively.
Foreclosed Residential Real Estate Property [Table Text Block]	The following table shows information regarding foreclosed residential real estate property at the date indicated: September 30, 2015 (Dollars in thousands) Foreclosed residential real estate property held by the creditor $ 1,700 Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure $ 1,465
Age analysis of past due financing receivables	The following table shows the age analysis of past due financing receivables as of the dates indicated: September 30, 2015 30-59 days 60-89 days 90 days or more Total Past Due Total Financing Receivables Recorded Investment >90 Days and Accruing Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Current (Dollars in thousands) Loan Portfolio Commercial and industrial 6 $ 383 3 $ 920 10 $ 3,334 19 $ 4,637 $ 857,875 $ 862,512 $ — Commercial real estate 6 1,222 4 746 16 4,769 26 6,737 2,652,605 2,659,342 — Commercial construction — — — — 1 306 1 306 307,908 308,214 — Small business 8 27 4 44 10 105 22 176 92,102 92,278 — Residential real estate 12 1,620 9 1,760 23 4,096 44 7,476 644,461 651,937 — Home equity 27 1,770 13 769 14 1,295 54 3,834 904,060 907,894 — Other consumer (1) 308 262 9 16 13 33 330 311 15,633 15,944 — Total 367 $ 5,284 42 $ 4,255 87 $ 13,938 496 $ 23,477 $ 5,474,644 $ 5,498,121 $ — December 31, 2014 30-59 days 60-89 days 90 days or more Total Past Due Total Financing Receivables Recorded Investment >90 Days and Accruing Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Number of Loans Principal Balance Current (Dollars in thousands) Loan Portfolio Commercial and industrial 18 $ 3,192 10 $ 1,007 19 $ 2,320 47 $ 6,519 $ 854,320 $ 860,839 $ — Commercial real estate 19 13,428 6 1,480 16 4,225 41 19,133 2,328,190 2,347,323 — Commercial construction 1 506 — — 1 311 2 817 265,177 265,994 — Small business 7 21 8 113 7 173 22 307 84,940 85,247 — Residential real estate 13 1,670 10 1,798 36 4,826 59 8,294 521,965 530,259 106 Home equity 20 1,559 7 307 23 2,402 50 4,268 859,595 863,863 — Other consumer (1) 318 382 16 23 15 15 349 420 16,788 17,208 13 Total 396 $ 20,758 57 $ 4,728 117 $ 14,272 570 $ 39,758 $ 4,930,975 $ 4,970,733 $ 119
Summary of Troubled Debt Restructuring and other pertinent information	The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) TDRs on accrual status $ 37,477 $ 38,382 TDRs on nonaccrual 5,201 5,248 Total TDRs $ 42,678 $ 43,630 Amount of specific reserves included in the allowance for loan losses associated with TDRs $ 1,681 $ 2,004 Additional commitments to lend to a borrower who has been a party to a TDR $ 1,366 $ 1,400
Change in investment recorded subsequent to modifications	The following table shows the modifications which occurred during the periods indicated and the change in the recorded investment subsequent to the modifications occurring: Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (Dollars in thousands) Troubled debt restructurings Commercial and industrial 1 $ 100 $ 100 10 $ 1,153 $ 1,153 Commercial real estate 1 653 653 6 2,963 2,963 Small business 2 103 103 7 269 269 Residential real estate 2 218 245 5 376 403 Home equity 1 36 36 4 251 251 Total 7 $ 1,110 $ 1,137 32 $ 5,012 $ 5,039 Three Months Ended Nine Months Ended September 30, 2014 September 30, 2014 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (Dollars in thousands) Troubled debt restructurings Commercial and industrial 3 $ 193 $ 193 12 $ 744 $ 744 Commercial real estate 5 2,095 2,095 13 4,225 4,225 Small business — — — 1 58 58 Residential real estate 1 156 158 8 1,388 1,419 Home equity 2 55 55 9 781 781 Other consumer — — — 1 8 8 Total 11 $ 2,499 $ 2,501 44 $ 7,204 $ 7,235 (1) The post-modification balances represent the legal principal balance of the loan on the date of modification. These amounts may show an increase when modifications include a capitalization of interest.
Post modification balance of Troubled Debt Restructuring	The following table shows the Company’s post-modification balance of TDRs listed by type of modification during the period indicated: Three Months Ended September 30 Nine Months Ended September 30 2015 2014 2015 2014 (Dollars in thousands) (Dollars in thousands) Extended maturity $ 855 $ 1,902 $ 2,204 $ 3,403 Adjusted interest rate — — — 726 Combination rate and maturity 246 599 2,769 2,269 Court ordered concession 36 — 66 837 Total $ 1,137 $ 2,501 $ 5,039 $ 7,235
Troubled Debt Restructurings that subsequently defaulted	The following table shows loans that have been modified during the past twelve months which have subsequently defaulted during the periods indicated: Three Months Ended September 30 2015 2014 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (Dollars in thousands) Troubled debt restructurings that subsequently defaulted Commercial and industrial — — 1 46 Residential real estate — — 1 87 — $ — 2 $ 133 Nine Months Ended September 30 2015 2014 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (Dollars in thousands) Troubled debt restructurings that subsequently defaulted Commercial real estate 2 $ 880 — $ — Commercial and industrial 3 339 1 46 Residential real estate — — 3 214 5 $ 1,219 4 $ 260
Impaired loans by loan portfolio	The tables below set forth information regarding the Company’s impaired loans by loan portfolio at the dates indicated: September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 2,041 $ 2,193 $ — Commercial real estate 13,740 14,835 — Commercial construction 306 308 — Small business 458 494 — Residential real estate 3,555 3,658 — Home equity 4,564 4,631 — Other consumer 195 196 — Subtotal 24,859 26,315 — With an allowance recorded Commercial and industrial $ 3,555 $ 3,641 $ 252 Commercial real estate 15,766 15,938 225 Small business 513 543 28 Residential real estate 11,692 12,806 1,313 Home equity 1,213 1,359 245 Other consumer 416 430 27 Subtotal 33,155 34,717 2,090 Total $ 58,014 $ 61,032 $ 2,090 December 31, 2014 Recorded Investment Unpaid Principal Balance Related Allowance (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 3,005 $ 3,278 $ — Commercial real estate 15,982 17,164 — Commercial construction 311 311 — Small business 692 718 — Residential real estate 2,439 2,502 — Home equity 4,169 4,221 — Other consumer 338 341 — Subtotal 26,936 28,535 — With an allowance recorded Commercial and industrial $ 1,649 $ 1,859 $ 412 Commercial real estate 14,747 15,514 197 Small business 396 458 7 Residential real estate 12,616 13,727 1,500 Home equity 1,161 1,264 262 Other consumer 530 530 38 Subtotal 31,099 33,352 2,416 Total $ 58,035 $ 61,887 $ 2,416
Interest income recognized on impaired loans	The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated: Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 2,080 $ 11 $ 2,204 $ 41 Commercial real estate 13,876 89 14,433 337 Commercial construction 307 — 309 — Small business 465 4 484 14 Residential real estate 3,566 42 3,601 123 Home equity 4,585 44 4,670 134 Other consumer 198 4 207 12 Subtotal 25,077 194 25,908 661 With an allowance recorded Commercial and industrial $ 3,687 $ 10 $ 3,894 $ 57 Commercial real estate 15,830 204 15,993 609 Small business 540 7 564 22 Residential real estate 11,698 106 11,764 358 Home equity 1,221 4 1,238 13 Other consumer 421 4 443 11 Subtotal 33,397 335 33,896 1,070 Total $ 58,474 $ 529 $ 59,804 $ 1,731 Three Months Ended Nine Months Ended September 30, 2014 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded Commercial and industrial $ 4,411 $ 47 $ 4,743 $ 155 Commercial real estate 16,517 154 17,098 492 Small business 840 8 889 25 Residential real estate 2,806 34 2,836 71 Home equity 4,405 45 4,456 136 Other consumer 365 5 382 19 Subtotal 29,655 293 30,715 904 With an allowance recorded Commercial and industrial $ 3,889 $ 24 $ 4,285 $ 98 Commercial real estate 17,509 233 17,674 700 Small business 427 7 452 22 Residential real estate 12,841 106 12,959 324 Home equity 1,111 4 1,124 15 Other consumer 625 5 656 17 Subtotal 36,402 379 37,150 1,176 Total $ 66,057 $ 672 $ 67,865 $ 2,080
Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period	The following table displays certain information pertaining to PCI loans at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Outstanding balance $ 23,877 $ 25,279 Carrying amount $ 21,140 $ 22,315
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule	The following table summarizes activity in the accretable yield for the PCI loan portfolio: Three Months Ended September 30 Nine Months Ended September 30 2015 2014 2015 2014 (Dollars in thousands) Beginning balance $ 2,527 $ 3,845 $ 2,974 $ 2,514 Acquisition — — 319 — Accretion (592 ) (667 ) (2,138 ) (1,722 ) Other change in expected cash flows (1) 278 380 978 2,572 Reclassification from nonaccretable difference for loans which have paid off (2) 218 — 298 194 Ending balance $ 2,431 $ 3,558 $ 2,431 $ 3,558 (1) Represents changes in cash flows expected to be collected and resulting in increased interest income as a prospective yield adjustment over the remaining life of the loan(s). (2) Results in increased interest income during the period in which the loan paid off at amount greater than originally expected.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Summary of earnings per share	Earnings per share consisted of the following components for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands, except share and per share data) Net income $ 18,594 $ 15,738 $ 45,505 $ 43,867 Weighted Average Shares Basic shares 26,200,621 23,911,678 25,774,571 23,876,391 Effect of dilutive securities 63,493 90,685 72,921 95,320 Diluted shares 26,264,114 24,002,363 25,847,492 23,971,711 Net income per share Basic EPS $ 0.71 $ 0.66 $ 1.77 $ 1.84 Effect of dilutive securities — — (0.01 ) (0.01 ) Diluted EPS $ 0.71 $ 0.66 $ 1.76 $ 1.83

Stock Based Compensation (Table

Stock Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted stock compensation footnote	During the nine months ended September 30, 2015 , the Company made the following awards of restricted stock: Date Shares Granted Plan Grant Date Fair Value Vesting Period 2/11/2015 31,500 2005 Employee Stock Plan $ 39.42 Ratably over 5 years from grant date 2/12/2015 25,910 2005 Employee Stock Plan $ 40.03 Ratably over 5 years from grant date 3/19/2015 3,800 2005 Employee Stock Plan $ 43.56 Ratably over 5 years from grant date 4/27/2015 625 2005 Employee Stock Plan $ 41.61 At the end of 3 years from grant date 4/27/2015 1,875 2005 Employee Stock Plan $ 41.61 At the end of 5 years from grant date 5/27/2015 8,800 2010 Non-Employee Director Stock Plan $ 45.02 At the end of 5 years from grant date 7/14/2015 800 2010 Non-Employee Director Stock Plan $ 47.82 Once on May 27, 2020

Repurchase Agreements Repurchas

Repurchase Agreements Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2015
Repurchase Agreements [Abstract]
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]	The table below sets forth information regarding the Company’s repurchase agreements allocated by source of collateral at the date indicated: September 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total (Dollars in thousands) Sources of Collateral U.S. government agency securities $ 10,148 $ — $ — $ — $ 10,148 Agency mortgage-backed securities 68,601 — — — 68,601 Agency collateralized mortgage obligations 59,700 — — — 59,700 Total borrowings $ 138,449 $ — $ — $ — $ 138,449

Derivatives and Hedging Activ30

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes	The following table reflects the Company’s derivative positions for the periods indicated below for interest rate swaps which qualify as cash flow hedges for accounting purposes: September 30, 2015 Notional Amount Trade Date Effective Date Maturity Date Receive (Variable) Index Current Rate Received Pay Fixed Swap Rate Fair Value (Dollars in thousands) $ 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.34 % 5.04 % $ (1,409 ) 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.34 % 5.04 % (1,409 ) 25,000 9-Dec-08 10-Dec-08 10-Dec-18 3 Month LIBOR 0.33 % 2.94 % (1,537 ) $ 75,000 $ (4,355 ) December 31, 2014 Notional Amount Trade Date Effective Date Maturity Date Receive (Variable) Index Current Rate Received Pay Fixed Swap Rate Fair Value (Dollars in thousands) $ 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.24 % 5.04 % $ (2,093 ) 25,000 16-Feb-06 28-Dec-06 28-Dec-16 3 Month LIBOR 0.24 % 5.04 % (2,094 ) 25,000 9-Dec-08 10-Dec-08 10-Dec-18 3 Month LIBOR 0.24 % 2.94 % (1,383 ) $ 75,000 $ (5,570 )
Summary of customer related derivative positions, not designated as hedging	The following table reflects the Company’s customer related derivative positions for the periods indicated below for those derivatives not designated as hedging: Notional Amount Maturing Number of Positions (1) Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value September 30, 2015 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 176 $ 63,287 $ 19,527 $ 42,008 $ 92,501 $ 435,087 $ 652,410 $ 29,205 Pay fixed, receive variable 170 $ 63,287 $ 19,527 $ 42,008 $ 92,501 $ 435,087 $ 652,410 $ (29,202 ) Foreign exchange contracts Buys foreign currency, sells U.S. currency 29 $ 35,732 $ — $ — $ — $ — $ 35,732 $ 332 Buys U.S. currency, sells foreign currency 29 $ 35,732 $ — $ — $ — $ — $ 35,732 $ (304 ) December 31, 2014 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 174 $ 88,147 $ 46,854 $ 40,958 $ 38,108 $ 403,208 $ 617,275 $ 17,840 Pay fixed, receive variable 168 $ 88,147 $ 46,854 $ 40,958 $ 38,108 $ 403,208 $ 617,275 $ (17,837 ) Foreign exchange contracts Buys foreign currency, sells U.S. currency 23 $ 57,112 $ — $ — $ — $ — $ 57,112 $ 3,983 Buys U.S. currency, sells foreign currency 23 $ 57,112 $ — $ — $ — $ — $ 57,112 $ (3,960 ) (1) The Company may enter
Fair value of derivative financial instruments as well as their classification on the balance sheet	The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the balance sheet at the periods indicated: Asset Derivatives Liability Derivatives Fair Value at Fair Value at Fair Value at Fair Value at Balance Sheet September 30, 2015 December 31, 2014 Balance Sheet September 30, 2015 December 31, 2014 (Dollars in thousands) Derivatives designated as hedges Interest rate derivatives Other assets $ — $ — Other liabilities $ 4,355 $ 5,570 Derivatives not designated as hedges Customer Related Positions Loan level derivatives Other assets $ 29,205 $ 18,383 Other liabilities $ 29,202 $ 18,380 Foreign exchange contracts Other assets 662 4,007 Other liabilities 634 3,984 Mortgage Derivatives Interest rate lock commitments Other assets 209 295 Other liabilities — — Forward TBA mortgage contracts Other assets — — Other liabilities — 16 Forward sales agreements Other assets 140 3 Other liabilities — — $ 30,216 $ 22,688 $ 29,836 $ 22,380 Total $ 30,216 $ 22,688 $ 34,191 $ 27,950
Effect of derivative financial instruments included in OCI and current earnings	The table below presents the effect of the Company’s derivative financial instruments included in OCI and current earnings for the periods indicated: Three Months Ended Nine Months Ended September 30 September 30 2015 2014 2015 2014 (Dollars in thousands) Derivatives designated as hedges Gain in OCI on derivatives (effective portion), net of tax $ 132 $ 578 $ 596 $ 2,085 Loss reclassified from OCI into interest expense (effective portion) $ (715 ) $ (726 ) $ (2,130 ) $ (2,937 ) Loss reclassified from OCI into noninterest expense (loss on termination) $ — $ — $ — $ (1,122 ) Loss recognized in income on derivatives (ineffective portion & amount excluded from effectiveness testing) Interest expense $ — $ — $ — $ — Other expense — — — — Total $ — $ — $ — $ — Derivatives not designated as hedges Changes in fair value of customer related positions Other income $ 39 $ 10 $ 56 $ 54 Other expense — (1 ) (51 ) (3 ) Changes in fair value of mortgage derivatives Mortgage banking income 174 42 $ 67 $ 43 Total $ 213 $ 51 $ 72 $ 94

Asset & Liability Derivative Po

Asset & Liability Derivative Positions & the Potential Effect of Netting Arrangements - Current Quarter (Tables)	9 Months Ended
	Sep. 30, 2015
Offsetting [Abstract]
Offsetting Assets [Table Text Block]	The following tables present the Company's asset and liability derivative positions and the potential effect of netting arrangements on its financial position, as of the periods indicated: Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts Recognized in the Statement of Financial Position Gross Amounts Offset in the Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Financial Instruments Collateral Pledged (Received) Net Amount September 30, 2015 (Dollars in thousands) Derivative Assets Interest rate swaps $ — $ — $ — $ — $ — $ — Loan level derivatives 29,205 — 29,205 — — 29,205 Customer foreign exchange contracts 662 — 662 — — 662 $ 29,867 $ — $ 29,867 $ — $ — $ 29,867 Derivative Liabilities Interest rate swaps $ 4,355 $ — $ 4,355 $ — $ 4,355 $ — Loan level derivatives 29,202 — 29,202 — 29,202 — Customer foreign exchange contracts 634 — 634 — — 634 Repurchase agreements Customer repurchase agreements 138,449 — 138,449 — 138,449 — $ 172,640 $ — $ 172,640 $ — $ 172,006 $ 634 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts Recognized in the Statement of Financial Position Gross Amounts Offset in the Statement of Financial Position Net Amounts Presented in the Statement of Financial Position Financial Instruments (1) Collateral Pledged (Received) Net Amount December 31, 2014 (Dollars in thousands) Derivative Assets Interest rate swaps $ — $ — $ — $ — $ — $ — Loan level derivatives 18,383 — 18,383 272 — 18,111 Customer foreign exchange contracts 4,007 — 4,007 — — 4,007 $ 22,390 $ — $ 22,390 $ 272 $ — $ 22,118 Derivative Liabilities Interest rate swaps $ 5,570 $ — $ 5,570 $ — $ 5,570 $ — Loan level derivatives 18,380 — 18,380 272 17,836 272 Customer foreign exchange contracts 3,984 — 3,984 — — 3,984 Repurchase agreements Customer repurchase agreements 147,890 — 147,890 — 147,890 — Wholesale repurchase agreements 50,000 — 50,000 — 50,000 — $ 225,824 $ — $ 225,824 $ 272 $ 221,296 $ 4,256 (1) Reflects offsetting derivative positions with the same counterparty.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis	Assets and liabilities measured at fair value at the periods indicated were as follows: Fair Value Measurements at Reporting Date Using Balance Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2015 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 454 $ 454 $ — $ — Securities available for sale U.S. Government agency securities 37,587 — 37,587 $ — Agency mortgage-backed securities 212,921 — 212,921 — Agency collateralized mortgage obligations 52,075 — 52,075 — State, county, and municipal securities 4,671 — 4,671 — Single issuer trust preferred securities issued by banks and insurers 2,841 — 2,841 — Pooled trust preferred securities issued by banks and insurers 1,586 — — 1,586 Small business administration pooled securities 41,156 — 41,156 — Equity securities 12,955 12,955 — — Loans held for sale 11,476 — 11,476 — Derivative instruments 30,216 — 30,216 — Liabilities Derivative instruments 34,191 — 34,191 — Total recurring fair value measurements $ 373,747 $ 13,409 $ 358,752 $ 1,586 Nonrecurring fair value measurements Assets Collateral dependent impaired loans $ 6,011 $ — $ — $ 6,011 Other real estate owned and other foreclosed assets 2,532 — — 2,532 Total nonrecurring fair value measurements $ 8,543 $ — $ — $ 8,543 Fair Value Measurements at Reporting Date Using Balance Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2014 (Dollars in thousands) Recurring fair value measurements Assets Securities available for sale U.S. Government agency securities $ 41,486 $ — $ 41,486 $ — Agency mortgage-backed securities 217,678 — 217,678 — Agency collateralized mortgage obligations 63,035 — 63,035 — State, county, and municipal securities 5,223 5,223 Single issuer trust preferred securities issued by banks and insurers 2,909 — 2,909 — Pooled trust preferred securities issued by banks and insurers 6,321 — — 6,321 Equity securities 11,902 11,902 — — Loans held for sale 6,888 — 6,888 — Derivative instruments 22,688 — 22,688 — Liabilities Derivative instruments 27,950 — 27,950 — Total recurring fair value measurements $ 350,180 $ 11,902 $ 331,957 $ 6,321 Nonrecurring fair value measurements: Assets Collateral dependent impaired loans $ 8,196 $ — $ — $ 8,196 Other real estate owned and other foreclosed assets 7,743 — — 7,743 Total nonrecurring fair value measurements $ 15,939 $ — $ — $ 15,939
Reconciliation for all assets and liabilities measured at fair value on a recurring basis	The table below presents a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3), which were valued using pricing models and discounted cash flow methodologies, as of the dates indicated: Securities Available for Sale: Three Months Ended September 30, 2015 Three Months Ended September 30, 2014 (Dollars in thousands) Pooled Trust Preferred Securities Beginning balance $ 1,595 $ 5,091 Gains and (losses) (realized/unrealized) Included in other comprehensive income 12 318 Settlements (21 ) (23 ) Ending balance $ 1,586 $ 5,386
Investments in securities that are classified as level 3	The following table sets forth certain unobservable inputs regarding the Company’s investment in securities that are classified as Level 3 for the periods indicated: September 30 December 31 September 30 December 31 September 30 December 31 2015 2014 2015 2014 2015 2014 Valuation Technique Fair Value Unobservable Inputs Range Weighted Average (Dollars in thousands) Discounted cash flow methodology Pooled trust preferred securities $ 1,586 $ 6,321 Cumulative prepayment 0% - 65% 0% - 75% 2.5% 7.0% Cumulative default 5% - 100% 3% - 100% 14.8% 13.9% Loss given default 85% - 100% 85% - 100% 94.2% 96.1% Cure given default 0% - 75% 0% - 75% 63.8% 46.7% Appraisals of collateral (1) Impaired loans $ 6,011 $ 8,196 Other real estate owned and foreclosed assets $ 2,532 $ 7,743 (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable. 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.
The estimated fair values and related carrying amounts for assets and liabilities	The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below as of the periods indicated: Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2015 (Dollars in thousands) Financial assets Securities held to maturity(a) U.S. Treasury securities $ 1,009 $ 1,084 $ — $ 1,084 $ — Agency mortgage-backed securities 172,684 178,402 — 178,402 — Agency collateralized mortgage obligations 230,820 231,910 — 231,910 — State, county, and municipal securities 225 229 — 229 — Single issuer trust preferred securities issued by banks 1,500 1,496 — 1,496 — Small business administration pooled securities 36,901 37,613 — 37,613 — Corporate debt securities 5,000 5,042 — 5,042 — Loans, net of allowance for loan losses(b) 5,436,905 5,406,492 — — 5,406,492 Financial liabilities Time certificates of deposits(c) $ 711,263 $ 713,473 $ — $ 713,473 $ — Federal Home Loan Bank borrowings(c) 104,133 104,989 — 104,989 — Customer repurchase agreements and other short-term borrowings(c) 138,449 138,449 — — 138,449 Junior subordinated debentures(d) 73,520 70,925 — 70,925 — Subordinated debentures(c) 35,000 35,282 — — 35,282 Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2014 (Dollars in thousands) Financial assets Securities held to maturity(a) U.S. Treasury securities $ 1,010 $ 1,073 $ — $ 1,073 $ — Agency mortgage-backed securities 159,522 164,944 — 164,944 — Agency collateralized mortgage obligations 198,220 196,584 — 196,584 — State, county, and municipal securities 424 428 — 428 — Single issuer trust preferred securities issued by banks 1,500 1,477 — 1,477 — Small business administration pooled securities 9,775 10,074 — 10,074 — Corporate debt securities 5,002 5,119 — 5,119 — Loans, net of allowance for loan losses(b) 4,907,437 4,875,283 — — 4,875,283 Financial liabilities Time certificates of deposits(c) $ 649,620 $ 651,180 $ — $ 651,180 $ — Federal Home Loan Bank borrowings(c) 70,080 70,208 — 70,208 — Customer repurchase agreements and other short-term borrowings(c) 147,890 147,890 — — 147,890 Wholesale repurchase agreements(c) 50,000 50,510 — — 50,510 Junior subordinated debentures(d) 73,685 70,045 — 70,045 — Subordinated debentures(c) 65,000 64,198 — — 64,198 (a) The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analyses. (b) Fair value is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities or cash flows. (c) Fair value was determined by discounting anticipated future cash payments using rates currently available for instruments with similar remaining maturities. (d) Fair value was determined based upon market prices of securities with similar terms and maturities.

Comprehensive Income_Loss (Tabl

Comprehensive Income/Loss (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Comprehensive income	comprehensive income (loss): Three Months Ended September 30, 2015 Nine Months Ended September 30, 2015 Pre Tax Tax (Expense) After Tax Pre Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ 1,966 $ (755 ) $ 1,211 $ 597 $ (239 ) $ 358 Less: net security losses reclassified into other noninterest income — — — (315 ) 129 (186 ) Net change in fair value of securities available for sale 1,966 (755 ) 1,211 912 (368 ) 544 Change in fair value of cash flow hedges (493 ) 201 (292 ) (1,096 ) 429 (667 ) Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) (715 ) 291 (424 ) (2,130 ) 867 (1,263 ) Net change in fair value of cash flow hedges 222 (90 ) 132 1,034 (438 ) 596 Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 50 (21 ) 29 137 (71 ) 66 Less: amortization of actuarial gains 61 (25 ) 36 182 (74 ) 108 Less: amortization of prior service costs 75 (30 ) 45 227 (92 ) 135 Net change in other comprehensive income for defined benefit postretirement plans (2) 186 (76 ) 110 546 (237 ) 309 Total other comprehensive income $ 2,374 $ (921 ) $ 1,453 $ 2,492 $ (1,043 ) $ 1,449 Three Months Ended September 30, 2014 Nine Months Ended September 30, 2014 Pre Tax Tax (Expense) After Tax Pre Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (1,322 ) $ 512 $ (810 ) $ 5,869 $ (2,325 ) $ 3,544 Less: net security gains reclassified into other noninterest income 67 (27 ) 40 138 (56 ) 82 Net change in fair value of securities available for sale (1,389 ) 539 (850 ) 5,731 (2,269 ) 3,462 Change in fair value of cash flow hedges 252 (103 ) 149 (535 ) 220 (315 ) Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) (726 ) 297 (429 ) (2,937 ) 1,200 (1,737 ) Less: loss on termination of hedge reclassified into noninterest expense — — — (1,122 ) 459 (663 ) Net change in fair value of cash flow hedges 978 (400 ) 578 3,524 (1,439 ) 2,085 Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period (80 ) 32 (48 ) (240 ) 98 (142 ) Less: amortization of actuarial losses (10 ) 5 (5 ) (32 ) 13 (19 ) Less: amortization of prior service costs 26 (11 ) 15 76 (31 ) 45 Less: amortization of transfer obligations (2 ) 1 (1 ) (2 ) 1 (1 ) Net change in other comprehensive income for defined benefit postretirement plans (2) (66 ) 27 (39 ) (198 ) 81 (117 ) Total other comprehensive income (loss) $ (477 ) $ 166 $ (311 ) $ 9,057 $ (3,627 ) $ 5,430 (1) Includes the amortization of the remaining balance of a realized but unrecognized gain, net of tax, from the termination of interest rate swaps in June 2009. The original gain of $1.4 million , net of tax, is being recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain has amortized to $463,000 and $606,000 at September 30, 2015 and 2014 , respectively. (2) The amortization of prior service costs is included in the computation of net periodic pension cost as disclosed in the Employee Benefit Plans footnote in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 , filed with the Securities and Exchange Commission.
Company's accumulated other comprehensive loss, net of tax	Information on the Company’s accumulated other comprehensive loss, net of tax, is comprised of the following components as of the periods indicated: Unrealized Gain on Securities Unrealized Loss on Cash Flow Hedge Deferred Gain on Hedge Transactions Defined Benefit Postretirement Plans Accumulated Other Comprehensive Loss (Dollars in thousands) 2015 Beginning balance: January 1, 2015 $ 3,389 $ (3,298 ) $ 571 $ (2,794 ) $ (2,132 ) Net change in other comprehensive income (loss) 544 704 (108 ) 309 1,449 Ending balance: September 30, 2015 $ 3,933 $ (2,594 ) $ 463 $ (2,485 ) $ (683 ) 2014 Beginning balance: January 1, 2014 $ (2,023 ) $ (5,698 ) $ 715 $ (428 ) $ (7,434 ) Net change in other comprehensive income (loss) 3,462 2,194 (109 ) (117 ) 5,430 Ending balance: September 30, 2014 $ 1,439 $ (3,504 ) $ 606 $ (545 ) $ (2,004 )

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	The following table summarizes the above financial instruments at the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Commitments to extend credit $ 2,011,329 $ 1,822,369 Standby letters of credit 18,834 18,516 Deferred standby letter of credit fees 77 105

Investments is Low Income Hou35

Investments is Low Income Housing Tax Credits Investments in Low Income Housing Tax Credits (Tables)	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments in Low Income Housing Projects [Table Text Block]	The following table presents the Company's investments in low income housing projects as of the dates indicated: September 30, 2015 December 31, 2014 (Dollars in thousands) Original investment value $ 42,626 $ 40,541 Current recorded investment 38,929 38,943 Unfunded liability obligation 15,272 28,004 Tax credits and benefits (1) 4,151 1,683 Amortization of investments (2) 2,840 1,089 Net income tax benefit (3) 1,314 594 (1) This amount reflects anticipated tax credits and tax benefits for the full years ended December 31, 2015 and 2014 . (2) The amortization amount reduces the tax credits and benefits anticipated for the full years ended December 31, 2015 and 2014 . (3) This amount represents the net tax benefit expected to be realized for the full years ended December 31, 2015 and 2014 in determining the Company's effective tax rate.

ACQUISITIONS - Estimated FV of

ACQUISITIONS - Estimated FV of Assets Acquired & Liab Assumed(Details) - USD ($) $ in Thousands	Sep. 30, 2015	Feb. 20, 2015	Dec. 31, 2014
Assets
Goodwill	$ 201,083		$ 170,421
Peoples Federal Bancshares, Inc [Member]
Assets
Cash		$ 41,957
Investments		43,585
Loans		463,927
Premises and equipment		9,346
Goodwill		30,662
Core deposit intangible		3,936
Other assets		46,920
Total assets acquired		640,333
Liabilities
Deposits		432,250
Borrowings		51,209
Other liabilities		15,054
Total liabilities assumed		498,513
Purchase price		$ 141,820

ACQUISITIONS PCI Loans (Details

ACQUISITIONS PCI Loans (Details 1) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Feb. 20, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Interest component of expected cash flows	$ (2,431)	$ (2,527)		$ (2,974)	$ (3,558)	$ (3,845)	$ (2,514)
Peoples Federal Bancshares, Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest payments receivable			$ 4,358
Certain Loans Acquired in Transfer, Nonaccretable Difference			(1,596)
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition			2,762
Interest component of expected cash flows			(319)
Less: fair value (initial carrying amount)			$ 2,443

ACQUISITIONS Selected Pro Forma

ACQUISITIONS Selected Pro Forma Results (Details 2) - Peoples Federal Bancshares, Inc [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Net interest income after provision for loan losses	$ 54,245	$ 52,089	$ 161,700	$ 150,878
Net income	$ 18,594	$ 15,590	$ 50,360	$ 44,772

ACQUISITIONS (Details Textual)

ACQUISITIONS (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Feb. 20, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Acquisition Related Costs		$ 0	$ 677	$ 10,501	$ 754
Peoples Federal Bancshares, Inc [Member]
Business Acquisition [Line Items]
Equity Interest Issued or Issuable Shareholders Option To Receive, Cash Per Share	$ 21
Number of shares of company stock issued for each share of Central common stock (in shares)	0.5523
Value of shares of company stock issued for each share of acquiree stock (in dollars per share)	$ 23.26
Company's closing price per share (in dollars per share)	$ 42.11
Business transaction value	$ 141,800
Cost of acquired entity, percentage cash	40.00%
Business Acquisition, Cost of Acquired Entity, Percentage Stock Consideration	60.00%
Cost of acquired entity, cash paid	$ 55,400
Consideration Transferred, Equity Interests Issued and Issuable	$ 86,400
Increase in acquirer outstanding shares	2,052,137
Acquisition Related Costs				10,500
Loans acquired	$ 463,927
Combination of INDB and Peoples Federal Bancshares, Inc [Member]
Business Acquisition [Line Items]
Acquisition Related Costs				$ 16,700

Securities (Reconciliation of f

Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	$ 359,419	$ 343,093
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	8,073	8,832
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(1,700)	(3,371)
Available-for-sale Securities	365,792	348,554
Held to maturity Securities, Amortized Cost	448,139	375,453
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	9,320	7,747
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(1,683)	(3,501)
Held to Maturity, Fair Value, Total	455,776	379,699
Amortized Cost	807,558	718,546
Gross Unrealized Gains	17,393	16,579
Unrealized Losses Other	(3,383)	(6,872)
Fair Value	821,568	728,253
U. S. Government Agency Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	36,895	41,369
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	692	139
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	(22)
Available-for-sale Securities	37,587	41,486
U.S. Treasury securities
Reconciliation of fair value of securities
Held to maturity Securities, Amortized Cost	1,009	1,010
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	75	63
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	0	0
Held to Maturity, Fair Value, Total	1,084	1,073
Agency mortgage-backed securities
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	206,778	211,168
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	6,247	7,203
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(104)	(693)
Available-for-sale Securities	212,921	217,678
Held to maturity Securities, Amortized Cost	172,684	159,522
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	5,718	5,422
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	0	0
Held to Maturity, Fair Value, Total	178,402	164,944
Agency Collateralized Mortgage Obligations [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	51,868	63,059
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	611	599
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(404)	(623)
Available-for-sale Securities	52,075	63,035
Held to maturity Securities, Amortized Cost	230,820	198,220
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	2,769	1,842
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(1,679)	(3,478)
Held to Maturity, Fair Value, Total	231,910	196,584
State, County, and Municipal Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	4,557	5,106
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	114	117
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities	4,671	5,223
Held to maturity Securities, Amortized Cost	225	424
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	4	4
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	0	0
Held to Maturity, Fair Value, Total	229	428
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	2,877	2,913
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	9	12
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(45)	(16)
Available-for-sale Securities	2,841	2,909
Held to maturity Securities, Amortized Cost	1,500	1,500
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	0	0
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(4)	(23)
Held to Maturity, Fair Value, Total	1,496	1,477
Pooled trust preferred securities issued by banks and insurers
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	2,226	7,906
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	195
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(640)	(1,780)
Available-for-sale Securities	1,586	6,321
Small Business Administration Pooled Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	41,018	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	155	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(17)	0
Available-for-sale Securities	41,156	0
Held to maturity Securities, Amortized Cost	36,901	9,775
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	712	299
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	0	0
Held to Maturity, Fair Value, Total	37,613	10,074
Equity securities
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	13,200	11,572
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	245	567
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(490)	(237)
Available-for-sale Securities	12,955	11,902
Corporate debt securities
Reconciliation of fair value of securities
Held to maturity Securities, Amortized Cost	5,000	5,002
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	42	117
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	0	0
Held to Maturity, Fair Value, Total	$ 5,042	$ 5,119

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available for Sale, Amortized Cost
Available for sale Securities, Amortized Cost	$ 359,419	$ 343,093
Available for Sale, Fair Value
Available for sale Securities, Fair Value, Total	365,792	348,554
Held to Maturity, Amortized Cost
Held to maturity Securities, Amortized Cost	448,139	375,453
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Total	455,776	$ 379,699
Debt Securities
Available for Sale, Amortized Cost
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	42,709
Available for Sale, Amortized Cost, Due after five to ten years	81,841
Available for Sale, Amortized Cost, Due after ten years	221,669
Available for sale Securities, Amortized Cost	346,219
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	43,495
Available for Sale, Fair Value, Due after five to ten years	83,361
Available for Sale, Fair Value, Due after ten years	225,981
Available for sale Securities, Fair Value, Total	352,837
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	5,225
Held to Maturity, Amortized Cost, Due after one year to five years	118
Held to Maturity, Amortized Cost, Due after five to ten years	29,013
Held to Maturity, Amortized Cost, Due after ten years	413,783
Held to maturity Securities, Amortized Cost	448,139
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	5,271
Held to Maturity, Fair Value, Due after one year to five years	120
Held to Maturity, Fair Value, Due after five to ten years	29,954
Held to Maturity, Fair Value, Due after ten years	420,431
Held to Maturity, Fair Value, Total	455,776
Equity securities
Available for Sale, Amortized Cost
Available for Sale, Amortized Cost, Marketable equity securities	13,200
Available for Sale, Fair Value
Available for Sale, Fair Value, Marketable equity securities	12,955
Held to Maturity, Amortized Cost
Held to maturity Securities, Amortized Cost	0
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Total	$ 0

Securities (Unrealized Loss NOT

Securities (Unrealized Loss NOT deemed to be OTTI) (Details) $ in Thousands	Sep. 30, 2015USD ($)holding	Dec. 31, 2014USD ($)holding
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	58	80
Fair value, less than 12 months	$ 40,703	$ 64,537
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(363)	(467)
Fair value, 12 months or longer	97,413	143,949
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(3,020)	(5,981)
Fair value, Total	138,116	208,486
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (3,383)	$ (6,448)
U. S. Government Agency Securities [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings | holding		22
Fair value, less than 12 months		$ 21,950
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months		(22)
Fair value, 12 months or longer		0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months		0
Fair value, Total		21,950
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss		$ (22)
Agency mortgage-backed securities
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	8	17
Fair value, less than 12 months	$ 6,886	$ 3,471
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(18)	(1)
Fair value, 12 months or longer	4,515	42,222
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(86)	(692)
Fair value, Total	11,401	45,693
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (104)	$ (693)
Agency Collateralized Mortgage Obligations [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	12	14
Fair value, less than 12 months	$ 16,667	$ 35,083
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(135)	(331)
Fair value, 12 months or longer	85,255	94,974
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(1,948)	(3,770)
Fair value, Total	101,922	130,057
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (2,083)	$ (4,101)
Single issuer trust preferred securities issued by banks and insurers
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	3	2
Fair value, less than 12 months	$ 2,541	$ 2,553
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(15)	(39)
Fair value, 12 months or longer	1,039	0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(34)	0
Fair value, Total	3,580	2,553
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (49)	$ (39)
Pooled trust preferred securities issued by banks and insurers
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	1	2
Fair value, less than 12 months	$ 0	$ 0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	0	0
Fair value, 12 months or longer	1,586	2,681
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(640)	(1,356)
Fair value, Total	1,586	2,681
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (640)	$ (1,356)
Equity securities
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	33	23
Fair value, less than 12 months	$ 2,627	$ 1,480
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(178)	(74)
Fair value, 12 months or longer	5,018	4,072
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	(312)	(163)
Fair value, Total	7,645	5,552
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (490)	$ (237)
Small Business Administration Pooled Securities [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings | holding	1
Fair value, less than 12 months	$ 11,982
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months	(17)
Fair value, 12 months or longer	0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months	0
Fair value, Total	11,982
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss	$ (17)

Securities (Total OTTI) (Detail

Securities (Total OTTI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Gross change in OTTI recorded on certain investments	$ 0	$ 235	$ 84	$ 1,264
Portion of OTTI recognized in OCI	0	235	(84)	(1,264)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ 0	$ 0	$ 0	$ 0

Securities (Summary of Cumulati

Securities (Summary of Cumulative Credit Related Component of OTTI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of cumulative credit related component of OTTI
Balance at beginning of period	$ 0	$ (9,997)	$ (9,997)	$ (9,997)
Add
Incurred on securities not previously impaired	0	0	0	0
Incurred on securities previously impaired	0	0	0	0
Less
Securities sold during the period	0	0	9,997	0
Reclassification due to changes in Company's intent	0	0	0	0
Increases in cash flow expected to be collected	0	0	0	0
Balance at end of period	$ 0	$ (9,997)	$ 0	$ (9,997)

Securities (Details Textual) (D

Securities (Details Textual) (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Debt Securities	$ 0	$ 230,000
Securities (Textual) [Abstract]
Callable Securities in Investment Portfolio	25,100,000
Pledged Financial Instruments, Not Separately Reported, Securities	322,600,000	340,000,000
Trading Securities	454,000	0
Investments in obligations of individual states, counties or municipalities which exceed 10% of equity	$ 0	$ 0

Securities Realized Gain (Loss)

Securities Realized Gain (Loss) on Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Gain (Loss) on Investments [Line Items]
Available-For-Sale- Securities - Equity - Gross Realized Gains	$ 0	$ 67	$ 19	$ 138
Available-For-Sale Securities - Equity Gross Realized Losses	0	0	(8)	0
Net realized gain on equity securities	0	(67)	(11)	(138)
Available-For-Sale Securities - Fixed Income Gross Realized Gains	0	0	798	0
Available-for-Sale Securities - Fixed Income Gross Realized Losses	0	0	(1,124)	0
Net realized loss on fixed income securities	$ 0	$ 0	$ (326)	$ 0

Loans, Allowance for Loan Los47

Loans, Allowance for Loan Losses and Credit Quality (Allowance Allocations) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Amortization of Deferred Loan Origination Fees, Net	$ 4,000	$ 2,800
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	5,418,967	4,890,383
Ending Balance: Individually Evaluated for Impairment	58,014	58,035
Financing receivable	3,922,346	3,559,403
Ending Balance: Total Loans by Group	5,498,121	4,970,733
Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	21,140	22,315
Commercial and Industrial [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	856,916	856,185
Ending Balance: Individually Evaluated for Impairment	5,596	4,654
Financing receivable	862,512	860,839
Ending Balance: Total Loans by Group	862,512	860,839
Commercial and Industrial [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	0	0
Commercial Real Estate [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	2,618,612	2,304,099
Ending Balance: Individually Evaluated for Impairment	29,506	30,729
Financing receivable	2,659,342	2,347,323
Ending Balance: Total Loans by Group	2,659,342	2,347,323
Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	11,224	12,495
Construction Loans [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	307,908	265,501
Ending Balance: Individually Evaluated for Impairment	306	311
Financing receivable	308,214	265,994
Ending Balance: Total Loans by Group	308,214	265,994
Construction Loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	0	182
Small Business [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	91,307	84,159
Ending Balance: Individually Evaluated for Impairment	971	1,088
Financing receivable	92,278	85,247
Ending Balance: Total Loans by Group	92,278	85,247
Small Business [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	0	0
Residential Real Estate [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	627,031	505,799
Ending Balance: Individually Evaluated for Impairment	15,247	15,055
Ending Balance: Total Loans by Group	651,937	530,259
Residential Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	9,659	9,405
Consumer Home Equity [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	901,863	858,305
Ending Balance: Individually Evaluated for Impairment	5,777	5,330
Ending Balance: Total Loans by Group	907,894	863,863
Consumer Home Equity [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	254	228
Consumer Other [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Ending Balance: Collectively Evaluated for Impairment	15,330	16,335
Ending Balance: Individually Evaluated for Impairment	611	868
Ending Balance: Total Loans by Group	15,944	17,208
Consumer Other [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for loans based on collective and individual evaluation of impairment by loan category
Financing receivable	$ 3	$ 5

Loans, Allowance for Loan Los48

Loans, Allowance for Loan Losses and Credit Quality (ALLL - by category) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Summary of changes in allowance for loan losses
Beginning Balance	$ 54,995	$ 54,538	$ 55,100	$ 53,239
Charge-offs	(1,165)	(1,906)	(3,788)	(8,622)
Recoveries	575	472	2,893	1,735
Provision for loan losses	800	1,901	1,000	8,653
Ending Balance	55,205	55,005	55,205	55,005
Ending Balance: Individually Evaluated for Impairment	2,090	2,699	2,090	2,699	$ 2,416
Ending Balance: Collectively Evaluated for Impairment	53,115	52,306	53,115	52,306
Commercial and Industrial [Member]
Summary of changes in allowance for loan losses
Beginning Balance	15,279	15,929	15,573	15,622
Charge-offs	(497)	(504)	(1,531)	(1,757)
Recoveries	22	6	903	213
Provision for loan losses	(518)	91	(659)	1,444
Ending Balance	14,286	15,522	14,286	15,522
Ending Balance: Individually Evaluated for Impairment	252	541	252	541	412
Ending Balance: Collectively Evaluated for Impairment	14,034	14,981	14,034	14,981
Commercial Real Estate [Member]
Summary of changes in allowance for loan losses
Beginning Balance	26,359	25,095	25,873	24,541
Charge-offs	(28)	(691)	(236)	(4,273)
Recoveries	152	57	1,006	322
Provision for loan losses	582	1,248	422	5,119
Ending Balance	27,065	25,709	27,065	25,709
Ending Balance: Individually Evaluated for Impairment	225	315	225	315	197
Ending Balance: Collectively Evaluated for Impairment	26,840	25,394	26,840	25,394
Construction Loans [Member]
Summary of changes in allowance for loan losses
Beginning Balance	4,071	3,757	3,945	3,371
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan losses	422	356	548	742
Ending Balance	4,493	4,113	4,493	4,113
Ending Balance: Individually Evaluated for Impairment	0	0	0	0
Ending Balance: Collectively Evaluated for Impairment	4,493	4,113	4,493	4,113
Small Business [Member]
Summary of changes in allowance for loan losses
Beginning Balance	1,248	1,154	1,171	1,215
Charge-offs	(2)	(73)	(198)	(469)
Recoveries	57	29	189	168
Provision for loan losses	(20)	45	121	241
Ending Balance	1,283	1,155	1,283	1,155
Ending Balance: Individually Evaluated for Impairment	28	10	28	10	7
Ending Balance: Collectively Evaluated for Impairment	1,255	1,145	1,255	1,145
Residential Real Estate [Member]
Summary of changes in allowance for loan losses
Beginning Balance	2,551	2,879	2,834	2,760
Charge-offs	(40)	(199)	(242)	(653)
Recoveries	6	178	52	368
Provision for loan losses	75	(36)	(52)	347
Ending Balance	2,592	2,822	2,592	2,822
Ending Balance: Individually Evaluated for Impairment	1,313	1,521	1,313	1,521	1,500
Ending Balance: Collectively Evaluated for Impairment	1,279	1,301	1,279	1,301
Consumer Home Equity [Member]
Summary of changes in allowance for loan losses
Beginning Balance	4,871	4,969	4,956	5,036
Charge-offs	(249)	(160)	(659)	(562)
Recoveries	130	67	234	215
Provision for loan losses	128	71	349	258
Ending Balance	4,880	4,947	4,880	4,947
Ending Balance: Individually Evaluated for Impairment	245	269	245	269	262
Ending Balance: Collectively Evaluated for Impairment	4,635	4,678	4,635	4,678
Consumer Other [Member]
Summary of changes in allowance for loan losses
Beginning Balance	616	755	748	694
Charge-offs	(349)	(279)	(922)	(908)
Recoveries	208	135	509	449
Provision for loan losses	131	126	271	502
Ending Balance	606	737	606	737
Ending Balance: Individually Evaluated for Impairment	27	43	27	43	$ 38
Ending Balance: Collectively Evaluated for Impairment	$ 579	$ 694	$ 579	$ 694

Loans, Allowance for Loan Los49

Loans, Allowance for Loan Losses and Credit Quality (Internal Risk-Rating Categories for the Commercial Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	$ 3,922,346	$ 3,559,403
Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	862,512	860,839
Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	2,659,342	2,347,323
Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	308,214	265,994
Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	92,278	85,247
PASS [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	3,686,833	3,327,638
PASS [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	796,556	801,578
PASS [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	2,504,079	2,196,109
PASS [Member] | Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	297,405	248,696
PASS [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	88,793	81,255
POTENTIAL WEAKNESS [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	152,164	138,570
POTENTIAL WEAKNESS [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	45,609	37,802
POTENTIAL WEAKNESS [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	93,609	82,372
POTENTIAL WEAKNESS [Member] | Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	10,280	15,464
POTENTIAL WEAKNESS [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	2,666	2,932
DEFINITE WEAKNESS-LOSS UNLIKELY [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	81,957	90,595
DEFINITE WEAKNESS-LOSS UNLIKELY [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	20,272	20,241
DEFINITE WEAKNESS-LOSS UNLIKELY [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	60,421	67,571
DEFINITE WEAKNESS-LOSS UNLIKELY [Member] | Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	529	1,834
DEFINITE WEAKNESS-LOSS UNLIKELY [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	735	949
PARTIAL LOSS PROBABLE [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	1,392	2,600
PARTIAL LOSS PROBABLE [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	75	1,218
PARTIAL LOSS PROBABLE [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	1,233	1,271
PARTIAL LOSS PROBABLE [Member] | Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	0	0
PARTIAL LOSS PROBABLE [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	84	111
DEFINITE LOSS [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	0	0
DEFINITE LOSS [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	0	0
DEFINITE LOSS [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	0	0
DEFINITE LOSS [Member] | Commercial Construction [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	0	0
DEFINITE LOSS [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
TOTAL	$ 0	$ 0

Loans, Allowance for Loan Los50

Loans, Allowance for Loan Losses and Credit Quality (Weighted Average FICO Scores and the Weighted Average Combined LTV Ratio) (Details) - score	Sep. 30, 2015	Dec. 31, 2014
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable With Quality Of Loan Based On Weighted Average Fico Rating	741	739
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	60.80%	67.10%
Consumer Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable With Quality Of Loan Based On Weighted Average Fico Rating	765	764
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	50.90%	53.60%

Loans, Allowance for Loan Los51

Loans, Allowance for Loan Losses and Credit Quality (Summary of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 29,567	$ 27,393
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	4,114	2,822
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	8,699	7,279
Construction Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	307	311
Small Business [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	159	246
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	9,106	8,697
Consumer Home Equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	7,142	8,038
Consumer - Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 40	$ 0

Loans, Allowance for Loan Los52

Loans, Allowance for Loan Losses and Credit Quality (Age Analysis of Past Due Financing Receivables) (Details) $ in Thousands	Sep. 30, 2015USD ($)loan	Dec. 31, 2014USD ($)loan
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	367	396
Number of Loans 60-89 Days | loan	42	57
Number of Loans 90 Days or More | loan	87	117
Number of Loans Total Past Due | loan	496	570
Principal Balance Total Past Due	$ 23,477	$ 39,758
Current	5,474,644	4,930,975
Total Financing Receivables	5,498,121	4,970,733
Recorded Investment >90 Days and Accruing	$ 0	$ 119
Commercial and Industrial [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	6	18
Number of Loans 60-89 Days | loan	3	10
Number of Loans 90 Days or More | loan	10	19
Number of Loans Total Past Due | loan	19	47
Principal Balance Total Past Due	$ 4,637	$ 6,519
Current	857,875	854,320
Total Financing Receivables	862,512	860,839
Recorded Investment >90 Days and Accruing	$ 0	$ 0
Commercial Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	6	19
Number of Loans 60-89 Days | loan	4	6
Number of Loans 90 Days or More | loan	16	16
Number of Loans Total Past Due | loan	26	41
Principal Balance Total Past Due	$ 6,737	$ 19,133
Current	2,652,605	2,328,190
Total Financing Receivables	2,659,342	2,347,323
Recorded Investment >90 Days and Accruing	$ 0	$ 0
Construction Loans [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	0	1
Number of Loans 60-89 Days | loan	0	0
Number of Loans 90 Days or More | loan	1	1
Number of Loans Total Past Due | loan	1	2
Principal Balance Total Past Due	$ 306	$ 817
Current	307,908	265,177
Total Financing Receivables	308,214	265,994
Recorded Investment >90 Days and Accruing	$ 0	$ 0
Small Business [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	8	7
Number of Loans 60-89 Days | loan	4	8
Number of Loans 90 Days or More | loan	10	7
Number of Loans Total Past Due | loan	22	22
Principal Balance Total Past Due	$ 176	$ 307
Current	92,102	84,940
Total Financing Receivables	92,278	85,247
Recorded Investment >90 Days and Accruing	$ 0	$ 0
Residential Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	12	13
Number of Loans 60-89 Days | loan	9	10
Number of Loans 90 Days or More | loan	23	36
Number of Loans Total Past Due | loan	44	59
Principal Balance Total Past Due	$ 7,476	$ 8,294
Current	644,461	521,965
Total Financing Receivables	651,937	530,259
Recorded Investment >90 Days and Accruing	$ 0	$ 106
Consumer Home Equity [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	27	20
Number of Loans 60-89 Days | loan	13	7
Number of Loans 90 Days or More | loan	14	23
Number of Loans Total Past Due | loan	54	50
Principal Balance Total Past Due	$ 3,834	$ 4,268
Current	904,060	859,595
Total Financing Receivables	907,894	863,863
Recorded Investment >90 Days and Accruing	$ 0	$ 0
Consumer - Other [Member]
Age Analysis of Past Due Financing Receivables
Number of Loans 30-59 Days | loan	308	318
Number of Loans 60-89 Days | loan	9	16
Number of Loans 90 Days or More | loan	13	15
Number of Loans Total Past Due | loan	330	349
Principal Balance Total Past Due	$ 311	$ 420
Current	15,633	16,788
Total Financing Receivables	15,944	17,208
Recorded Investment >90 Days and Accruing	0	13
Financing Receivables, 30 to 59 Days Past Due [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	5,284	20,758
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	383	3,192
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	1,222	13,428
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	0	506
Financing Receivables, 30 to 59 Days Past Due [Member] | Small Business [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	27	21
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	1,620	1,670
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Home Equity [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	1,770	1,559
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer - Other [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	262	382
Financing Receivables, 60 to 89 Days Past Due [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	4,255	4,728
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	920	1,007
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	746	1,480
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Small Business [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	44	113
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	1,760	1,798
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Home Equity [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	769	307
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer - Other [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	16	23
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	13,938	14,272
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	3,334	2,320
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	4,769	4,225
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	306	311
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Small Business [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	105	173
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Real Estate [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	4,096	4,826
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Home Equity [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	1,295	2,402
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer - Other [Member]
Age Analysis of Past Due Financing Receivables
Principal Balance Total Past Due	$ 33	$ 15

Loans, Allowance for Loan Los53

Loans, Allowance for Loan Losses and Credit Quality (TDR's and Other Pertinent Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Summary of Troubled Debt Restructurings and other pertinent information
TDRS ON ACCRUAL STATUS	$ 37,477	$ 38,382
TDRS ON NONACCRUAL	5,201	5,248
TOTAL TDR'S	42,678	43,630
AMOUNT OF SPECIFIC RESERVES INCLUDED IN THE ALLOWANCE FOR LOAN LOSSES ASSOCIATED WITH TDRS:	1,681	2,004
Additional Commitments To Lend To Borrower For Trouble Debt Restructuring	$ 1,366	$ 1,400

Loans, Allowance for Loan Los54

Loans, Allowance for Loan Losses and Credit Quality (Modifications which occurred during the period & change in recorded investment) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)contract	Sep. 30, 2014USD ($)contract	Sep. 30, 2015USD ($)contract	Sep. 30, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	7	11	32	44
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,110	$ 2,499	$ 5,012	$ 7,204
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,137	$ 2,501	$ 5,039	$ 7,235
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	3	10	12
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 100	$ 193	$ 1,153	$ 744
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 100	$ 193	$ 1,153	$ 744
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	5	6	13
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 653	$ 2,095	$ 2,963	$ 4,225
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 653	$ 2,095	$ 2,963	$ 4,225
Small Business [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	2	0	7	1
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 103	$ 0	$ 269	$ 58
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 103	$ 0	$ 269	$ 58
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	2	1	5	8
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 218	$ 156	$ 376	$ 1,388
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 245	$ 158	$ 403	$ 1,419
Consumer - Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	2	4	9
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 36	$ 55	$ 251	$ 781
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 36	$ 55	$ 251	$ 781
Consumer - Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		0		1
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 0		$ 8
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 0		$ 8

Loans, Allowance for Loan Los55

Loans, Allowance for Loan Losses and Credit Quality (Post-Modification balance of TDRs Listed by Type of Modifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Post modification balance of Troubled Debt Restructuring
EXTENDED MATURITY	$ 855	$ 1,902	$ 2,204	$ 3,403
ADJUSTED INTEREST RATE	0	0	0	726
COMBINATION RATE & MATURITY	246	599	2,769	2,269
COURT ORDERED CONCESSION	36	0	66	837
TOTAL	$ 1,137	$ 2,501	$ 5,039	$ 7,235

Loans, Allowance for Loan Los56

Loans, Allowance for Loan Losses and Credit Quality (TDRs that have subsequently defaulted) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)contract	Sep. 30, 2014USD ($)contract	Sep. 30, 2015USD ($)contract	Sep. 30, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0	2	5	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 133	$ 1,219	$ 260
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract			2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment			$ 880	$ 0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0	1	3	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 46	$ 339	$ 46
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0	1	0	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 87	$ 0	$ 214

Loans, Allowance for Loan Los57

Loans, Allowance for Loan Losses and Credit Quality (Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 2,090	$ 2,416	$ 2,699
Related Allowance	2,090	2,416
Impaired Financing Receivable, Recorded Investment, Total	58,014	58,035
Impaired Financing Receivable, Unpaid Principal Balance	61,032	61,887
WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	24,859	26,936
Unpaid Principal Balance	26,315	28,535
Related Allowance	0	0
WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	33,155	31,099
Unpaid Principal Balance	34,717	33,352
Commercial and Industrial [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	252	412	541
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	2,041	3,005
Unpaid Principal Balance	2,193	3,278
Related Allowance	0	0
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	3,555	1,649
Unpaid Principal Balance	3,641	1,859
Commercial Real Estate [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	225	197	315
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	13,740	15,982
Unpaid Principal Balance	14,835	17,164
Related Allowance	0	0
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	15,766	14,747
Unpaid Principal Balance	15,938	15,514
Construction Loans [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Construction Loans [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	306	311
Unpaid Principal Balance	308	311
Related Allowance	0	0
Small Business [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	28	7	10
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	458	692
Unpaid Principal Balance	494	718
Related Allowance	0	0
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	513	396
Unpaid Principal Balance	543	458
Residential Real Estate [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,313	1,500	1,521
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	3,555	2,439
Unpaid Principal Balance	3,658	2,502
Related Allowance	0	0
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	11,692	12,616
Unpaid Principal Balance	12,806	13,727
Consumer - Home Equity [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	245	262	269
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	4,564	4,169
Unpaid Principal Balance	4,631	4,221
Related Allowance	0	0
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	1,213	1,161
Unpaid Principal Balance	1,359	1,264
Consumer - Other [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	27	38	$ 43
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	195	338
Unpaid Principal Balance	196	341
Related Allowance	0	0
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	416	530
Unpaid Principal Balance	$ 430	$ 530

Loans, Allowance for Loan Los58

Loans, Allowance for Loan Losses and Credit Quality (Int Inc. Recognized on Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income recognized on impaired loans
Average Recorded Investment	$ 58,474	$ 66,057	$ 59,804	$ 67,865
Interest Income Recognized	529	672	1,731	2,080
WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	25,077	29,655	25,908	30,715
Interest Income Recognized	194	293	661	904
WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	33,397	36,402	33,896	37,150
Interest Income Recognized	335	379	1,070	1,176
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	2,080	4,411	2,204	4,743
Interest Income Recognized	11	47	41	155
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	3,687	3,889	3,894	4,285
Interest Income Recognized	10	24	57	98
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	13,876	16,517	14,433	17,098
Interest Income Recognized	89	154	337	492
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	15,830	17,509	15,993	17,674
Interest Income Recognized	204	233	609	700
Construction Loans [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	307		309
Interest Income Recognized	0
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	465	840	484	889
Interest Income Recognized	4	8	14	25
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	540	427	564	452
Interest Income Recognized	7	7	22	22
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	3,566	2,806	3,601	2,836
Interest Income Recognized	42	34	123	71
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	11,698	12,841	11,764	12,959
Interest Income Recognized	106	106	358	324
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	4,585	4,405	4,670	4,456
Interest Income Recognized	44	45	134	136
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	1,221	1,111	1,238	1,124
Interest Income Recognized	4	4	13	15
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	198	365	207	382
Interest Income Recognized	4	5	12	19
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Interest income recognized on impaired loans
Average Recorded Investment	421	625	443	656
Interest Income Recognized	$ 4	$ 5	$ 11	$ 17

Loans, Allowance for Loan Los59

Loans, Allowance for Loan Losses and Credit Quality (Purchased Credit Impaired Loans - Outstanding/Carrying balances) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Outstanding balance	$ 23,877	$ 25,279
Carrying amount	$ 21,140	$ 22,315

Loans, Allowance for Loan Los60

Loans, Allowance for Loan Losses and Credit Quality (Activity in the Accretable Yield for PCI loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Beginning of Period	$ 2,527	$ 3,845	$ 2,974	$ 2,514
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Additions	0	0	319	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(592)	(667)	(2,138)	(1,722)
Certainloansacquiredinatransfernotaccountedforasdebtsecuritiesaccretableyieldadjustmentchangesinexpectedcashflow	278	380	978	2,572
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	218	0	298	194
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, End of Period	$ 2,431	$ 3,558	$ 2,431	$ 3,558

Loans, Allowance for Loan Los61

Loans, Allowance for Loan Losses and Credit Quality (Textual) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Days to be termed as non accrual loans	90 days
Tdrs Recorded Investment On Nonaccrual Status	$ 5,201	$ 5,248
Loans Allowance for Loan Losses and Credit Quality (Textual) [Abstract]
The amount of deferred fees	$ 4,000	$ 2,800

Loans, Allowance for Loan Los62

Loans, Allowance for Loan Losses and Credit Quality Foreclosed Residential Real Estate Property (Details) $ in Thousands	Sep. 30, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Foreclosed residential real estate property held by the creditor	$ 1,700
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 1,465

Earnings Per Share (EPS Compone

Earnings Per Share (EPS Components) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of earnings per share
Net income	$ 18,594	$ 15,738	$ 45,505	$ 43,867
Weighted Average Shares (in shares)
BASIC SHARES	26,200,621	23,911,678	25,774,571	23,876,391
EFFECT OF DILUTIVE SECURITIES	63,493	90,685	72,921	95,320
DILUTIVE SHARES	26,264,114	24,002,363	25,847,492	23,971,711
NET INCOME PER SHARE (in dollars per share)
BASIC EPS	$ 0.71	$ 0.66	$ 1.77	$ 1.84
EFFECT OF DILUTIVE SECURITIES	0	0	(0.01)	(0.01)
DILUTIVE EPS	$ 0.71	$ 0.66	$ 1.76	$ 1.83

Stock Based Compensation (Award

Stock Based Compensation (Awards of Restricted Stock) (Details)	9 Months Ended
	Sep. 30, 2015$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	21,780
Grant Date Fair Value | $ / shares	$ 40.03
2/11/2015 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	31,500
Grant Date Fair Value | $ / shares	$ 39.42
Vesting Period	Ratably over 5 years from grant date
2/12/2015 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	25,910
Grant Date Fair Value | $ / shares	$ 40.03
Vesting Period	Ratably over 5 years from grant date
3/19/2015 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	3,800
Grant Date Fair Value | $ / shares	$ 43.56
Vesting Period	Ratably over 5 years from grant date
4/27/2015 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	625
Grant Date Fair Value | $ / shares	$ 41.61
Vesting Period	At the end of 3 years from grant date
4/27/2015 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	1,875
Grant Date Fair Value | $ / shares	$ 41.61
Vesting Period	At the end of 5 years from grant date
5/27/2015 | 2010 Non-Employee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	8,800
Grant Date Fair Value | $ / shares	$ 45.02
Vesting Period	At the end of 5 years from grant date
7/14/2015 | 2010 Non-Employee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	800
Grant Date Fair Value | $ / shares	$ 47.82
Vesting Period	Once on May 27, 2020

Stock Based Compensation Perfor

Stock Based Compensation Performance-based Restricted Stock Textual (Details)	9 Months Ended
	Sep. 30, 2015$ / sharesshares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	21,780
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	$ 40.03

Repurchase Agreements Repurch66

Repurchase Agreements Repurchase Agreements (Details) $ in Thousands	Sep. 30, 2015USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 138,449
U.S. Government agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	10,148
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	68,601
Collateralized Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	59,700
Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	138,449
Maturity Overnight [Member] | U.S. Government agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	10,148
Maturity Overnight [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	68,601
Maturity Overnight [Member] | Collateralized Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	59,700
Maturity Less than 30 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Less than 30 Days [Member] | U.S. Government agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Less than 30 Days [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Less than 30 Days [Member] | Collateralized Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity 30 to 90 Days [Member] | U.S. Government agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity 30 to 90 Days [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity 30 to 90 Days [Member] | Collateralized Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Greater than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Greater than 90 Days [Member] | U.S. Government agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Greater than 90 Days [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
Maturity Greater than 90 Days [Member] | Collateralized Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 0

Derivatives and Hedging Activ67

Derivatives and Hedging Activities (Derivative Positions for Interest Rate Swaps which Qualify as Hedges) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Notional Amount	$ 75,000,000		$ 75,000,000		$ 75,000,000
Fair Value	(4,355,000)		(4,355,000)		(5,570,000)
Amortization Of Deferred Hedge Gains Losses	61,000	$ 61,000	183,000	$ 183,000
Positions One [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Notional Amount	$ 25,000,000		$ 25,000,000		$ 25,000,000
Receive (Variable) Index			3 Month LIBOR		3 Month LIBOR
Trade Date			Feb. 16, 2006		Feb. 16, 2006
Effective Date			Dec. 28, 2006		Dec. 28, 2006
Maturity Date			Dec. 28, 2016		Dec. 28, 2016
Current Rate Received	0.34%		0.34%		0.24%
Pay Fixed Swap Rate	5.04%		5.04%		5.04%
Fair Value	$ (1,409,000)		$ (1,409,000)		$ (2,093,000)
Positions Two [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Notional Amount	$ 25,000,000		$ 25,000,000		$ 25,000,000
Receive (Variable) Index			3 Month LIBOR		3 Month LIBOR
Trade Date			Feb. 16, 2006		Feb. 16, 2006
Effective Date			Dec. 28, 2006		Dec. 28, 2006
Maturity Date			Dec. 28, 2016		Dec. 28, 2016
Current Rate Received	0.34%		0.34%		0.24%
Pay Fixed Swap Rate	5.04%		5.04%		5.04%
Fair Value	$ (1,409,000)		$ (1,409,000)		$ (2,094,000)
Positions Four [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Notional Amount	$ 25,000,000		$ 25,000,000		$ 25,000,000
Receive (Variable) Index			3 Month LIBOR		3 Month LIBOR
Trade Date			Dec. 9, 2008		Dec. 9, 2008
Effective Date			Dec. 10, 2008		Dec. 10, 2008
Maturity Date			Dec. 10, 2018		Dec. 10, 2018
Current Rate Received	0.33%		0.33%		0.24%
Pay Fixed Swap Rate	2.94%		2.94%		2.94%
Fair Value	$ (1,537,000)		$ (1,537,000)		$ (1,383,000)

Derivatives and Hedging Activ68

Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands	Sep. 30, 2015USD ($)position	Dec. 31, 2014USD ($)position
Summary of customer related derivative positions, not designated as hedging
Total	$ 75,000	$ 75,000
Derivative Asset, Fair Value, Gross Asset	29,867	22,390
Fair Value	(4,355)	(5,570)
Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Derivative Asset, Fair Value, Gross Asset	29,205	18,383
Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Derivative Asset, Fair Value, Gross Asset	$ 662	$ 4,007
Not Designated as Hedging Instrument | Receive fixed, pay variable | Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Number of Positions | position	176	174
Less than 1 year	$ 63,287	$ 88,147
Less than 2 years	19,527	46,854
Less than 3 years	42,008	40,958
Less than 4 years	92,501	38,108
Thereafter	435,087	403,208
Total	652,410	617,275
Fair Value	$ 29,205	$ 17,840
Not Designated as Hedging Instrument | Pay fixed, receive variable | Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Number of Positions | position	170	168
Less than 1 year	$ 63,287	$ 88,147
Less than 2 years	19,527	46,854
Less than 3 years	42,008	40,958
Less than 4 years	92,501	38,108
Thereafter	435,087	403,208
Total	652,410	617,275
Fair Value	$ (29,202)	$ (17,837)
Not Designated as Hedging Instrument | Buys foreign currency, sells U.S. currency | Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Number of Positions | position	29	23
Less than 1 year	$ 35,732	$ 57,112
Total	35,732	57,112
Fair Value	$ 332	$ 3,983
Not Designated as Hedging Instrument | Buys U.S. currency, sells foreign currency | Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Number of Positions | position	29	23
Less than 1 year	$ 35,732	$ 57,112
Total	35,732	57,112
Fair Value	$ (304)	$ (3,960)

Derivatives and Hedging Activ69

Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 29,867	$ 22,390
Liability Derivatives	172,640	225,824
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	30,216	22,688
Derivative Asset, Fair Value, Gross Asset	30,216	22,688
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	29,836	22,380
Liability Derivatives	34,191	27,950
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Liability Derivatives	4,355	5,570
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	0
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	4,355	5,570
Loan level swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	29,205	18,383
Liability Derivatives	29,202	18,380
Loan level swaps [Member] | Not Designated as Hedging Instrument | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	29,205	18,383
Loan level swaps [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	29,202	18,380
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	662	4,007
Liability Derivatives	634	3,984
Foreign exchange contracts | Not Designated as Hedging Instrument | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value		4,007
Foreign exchange contracts | Not Designated as Hedging Instrument | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value		3,984
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Asset at Fair Value	209	295
Derivative Instrument Not Designated as a Hedge, Forward TBA Mortgage Contracts, Asset at Fair Value	0	0
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Asset at Fair Value	140	3
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Liabilities at Fair Value	0	0
Derivative Instrument Not Designated as a Hedge, Forward TBA Mortgage Contracts, Liability at Fair Value	0	16
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Liabilities at Fair Value	$ 0	$ 0

Derivatives and Hedging Activ70

Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain in OCI on derivatives (effective portion), net of tax	$ (292)	$ 149	$ (667)	$ (315)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, before Tax	0	0		(1,122)
Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain in OCI on derivatives (effective portion), net of tax	132	578	596	2,085
Loss reclassified from OCI into interest expense (effective portion)	(715)	(726)	(2,130)	(2,937)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	213	51	72	94
Interest Expense [Member] | Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0
Other expense | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	39	10	56	54
Changes in fair value of mortgage derivatives | Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0
Changes in fair value of mortgage derivatives | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other income	0	(1)	(51)	(3)
Total | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Mortgage banking income	$ 174	$ 42	$ 67	$ 43

Derivatives and Hedging Activ71

Derivatives and Hedging Activities (Textual) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in Fair Value on Loans Held for Sale	$ 181,000	$ 223,000	$ 3,000	$ 1,000
Exposure to Institutional Counterparties	0		0		$ 272,000
Amortization Of Deferred Hedge Gains Losses	$ 61,000	$ 61,000	183,000	$ 183,000
Maximum length of time Company is currently hedging its exposure	3 years
Interest expense from OCI, related to cash flow hedges before tax	$ 2,700,000
Notional amount of fair value hedged derivative	0		0
Customer related positions	$ 30,000,000		$ 30,000,000		$ 18,900,000

Assets & Liability Derivative P

Assets & Liability Derivative Positions & the Potential Effect of Netting Arrangements - Current Quarter (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Offsetting Liabilities [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 29,867	$ 22,390
Derivative Asset, Collateral, Obligation to Return Cash, Offset	0	0
Derivative Asset	29,867	22,390
Derivative, Collateral, Obligation to Return Securities	0	272
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	29,867	22,118
Derivative Liability, Fair Value, Gross Liability	172,640	225,824
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability	172,640	225,824
Derivative, Collateral, Right to Reclaim Securities	0	272
Derivative, Collateral, Right to Reclaim Cash	172,006	221,296
Derivative Liability, Fair Value, Amount Offset Against Collateral	634	4,256
Interest rate swaps
Offsetting Liabilities [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Asset, Collateral, Obligation to Return Cash, Offset	0	0
Derivative Asset	0	0
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Gross Liability	4,355	5,570
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability	4,355	5,570
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	4,355	5,570
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Loan level swaps
Offsetting Liabilities [Line Items]
Derivative Asset, Fair Value, Gross Asset	29,205	18,383
Derivative Asset, Collateral, Obligation to Return Cash, Offset	0	0
Derivative Asset	29,205	18,383
Derivative, Collateral, Obligation to Return Securities	0	272
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	29,205	18,111
Derivative Liability, Fair Value, Gross Liability	29,202	18,380
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability	29,202	18,380
Derivative, Collateral, Right to Reclaim Securities	0	272
Derivative, Collateral, Right to Reclaim Cash	29,202	17,836
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	272
Customer foreign exchange contracts
Offsetting Liabilities [Line Items]
Derivative Asset, Fair Value, Gross Asset	662	4,007
Derivative Asset, Collateral, Obligation to Return Cash, Offset	0	0
Derivative Asset	662	4,007
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	662	4,007
Derivative Liability, Fair Value, Gross Liability	634	3,984
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability	634	3,984
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	634	3,984
Customer repurchase agreements and other short-term borrowings(c)
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	138,449	147,890
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability	138,449	147,890
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	138,449	147,890
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 0	0
Wholesale repurchase agreements
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		50,000
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		0
Derivative Liability		50,000
Derivative, Collateral, Right to Reclaim Securities		0
Derivative, Collateral, Right to Reclaim Cash		50,000
Derivative Liability, Fair Value, Amount Offset Against Collateral		$ 0

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Trading Securities	$ 454	$ 0
Securities - available for sale	365,792	348,554
Disposal Group, Including Discontinued Operation, Mortgage Loans	11,476	6,888
Derivative Asset, Fair Value, Gross Asset	29,867	22,390
Recurring fair value measurements
LIABILITIES
TOTAL RECURRING FAIR VALUE MEASUREMENTS	373,747	350,180
Recurring fair value measurements | Trading Securities [Member]
ASSETS
Trading Securities	454
Recurring fair value measurements | U.S. Government agency securities
ASSETS
Securities - available for sale	37,587	41,486
Recurring fair value measurements | Agency mortgage-backed securities
ASSETS
Securities - available for sale	212,921	217,678
Recurring fair value measurements | Agency collateralized mortgage obligations
ASSETS
Securities - available for sale	52,075	63,035
Recurring fair value measurements | Municipal Bonds [Member]
ASSETS
Securities - available for sale	4,671	5,223
Recurring fair value measurements | Single issuer trust preferred securities issued by banks and insurers
ASSETS
Securities - available for sale	2,841	2,909
Recurring fair value measurements | Pooled trust preferred securities issued by banks and insurers
ASSETS
Securities - available for sale	1,586	6,321
Recurring fair value measurements | Small Business Administration Pooled Securities [Member]
ASSETS
Securities - available for sale	41,156
Recurring fair value measurements | Equity securities
ASSETS
Securities - available for sale	12,955	11,902
Recurring fair value measurements | Loans held for sale
ASSETS
Disposal Group, Including Discontinued Operation, Mortgage Loans	11,476	6,888
Recurring fair value measurements | Derivative Financial Instruments, Assets [Member]
ASSETS
Derivative Asset, Fair Value, Gross Asset	30,216	22,688
Recurring fair value measurements | Derivative instruments
LIABILITIES
Liabilities, Fair Value Disclosure, Recurring	34,191	27,950
Nonrecurring fair value measurements
LIABILITIES
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS	8,543	15,939
Nonrecurring fair value measurements | Collateral dependent impaired loans
ASSETS
Assets, Fair Value Disclosure, Nonrecurring	6,011	8,196
Nonrecurring fair value measurements | Other real estate owned and other foreclosed assets
ASSETS
Assets, Fair Value Disclosure, Nonrecurring	2,532	7,743
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements
LIABILITIES
TOTAL RECURRING FAIR VALUE MEASUREMENTS	13,409	11,902
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Trading Securities [Member]
ASSETS
Trading Securities	454
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member]
ASSETS
Securities - available for sale	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Equity securities
ASSETS
Securities - available for sale	12,955	11,902
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements
LIABILITIES
TOTAL RECURRING FAIR VALUE MEASUREMENTS	358,752	331,957
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | U.S. Government agency securities
ASSETS
Securities - available for sale	37,587	41,486
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Agency mortgage-backed securities
ASSETS
Securities - available for sale	212,921	217,678
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Agency collateralized mortgage obligations
ASSETS
Securities - available for sale	52,075	63,035
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Municipal Bonds [Member]
ASSETS
Securities - available for sale	4,671	5,223
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Single issuer trust preferred securities issued by banks and insurers
ASSETS
Securities - available for sale	2,841	2,909
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member]
ASSETS
Securities - available for sale	41,156
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Loans held for sale
ASSETS
Securities - available for sale	11,476	6,888
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Derivative Financial Instruments, Assets [Member]
ASSETS
Derivative Asset, Fair Value, Gross Asset	30,216	22,688
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Derivative instruments
LIABILITIES
Liabilities, Fair Value Disclosure, Recurring	34,191	27,950
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements
LIABILITIES
TOTAL RECURRING FAIR VALUE MEASUREMENTS	$ 1,586	$ 6,321
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | U.S. Government agency securities
ASSETS
Securities - available for sale
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Pooled trust preferred securities issued by banks and insurers
ASSETS
Securities - available for sale	$ 1,586	$ 6,321
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member]
ASSETS
Securities - available for sale	0
Significant Unobservable Inputs (Level 3) | Nonrecurring fair value measurements
LIABILITIES
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS	8,543	15,939
Significant Unobservable Inputs (Level 3) | Nonrecurring fair value measurements | Collateral dependent impaired loans
ASSETS
Assets, Fair Value Disclosure, Nonrecurring	6,011	8,196
Significant Unobservable Inputs (Level 3) | Nonrecurring fair value measurements | Other real estate owned and other foreclosed assets
ASSETS
Assets, Fair Value Disclosure, Nonrecurring	$ 2,532	$ 7,743

Fair Value Measurements (Deta74

Fair Value Measurements (Details 1) - Pooled trust preferred securities - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation for all assets and liabilities measured at fair value on a recurring basis
Beginning Balance	$ 1,595	$ 5,091	$ 6,321	$ 3,841
Included in Other Comprehensive Income	12	318	20	1,666
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			(4,679)	0
SETTLEMENTS	(21)	(23)	(76)	(121)
Ending Balance	$ 1,586	$ 5,386	$ 1,586	$ 5,386

Fair Value Measurements (Deta75

Fair Value Measurements (Details 2) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Investments in securities that are classified as level 3
Available-for-sale Securities	$ 365,792	$ 348,554
Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) | Weighted Average [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	2.50%	7.00%
Cumulative Default	14.80%	13.90%
Loss Given Default	94.20%	96.10%
Cure Given Default	63.80%	46.70%
Pooled trust preferred securities | Significant Unobservable Inputs (Level 3)
Investments in securities that are classified as level 3
Available-for-sale Securities	$ 1,586	$ 6,321
Pooled trust preferred securities | Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) | Minimum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	0.00%	0.00%
Cumulative Default	5.00%	3.00%
Loss Given Default	85.00%	85.00%
Cure Given Default	0.00%	0.00%
Pooled trust preferred securities | Discounted cash flow methodology [Member] | Significant Unobservable Inputs (Level 3) | Maximum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	65.00%	75.00%
Cumulative Default	100.00%	100.00%
Loss Given Default	100.00%	100.00%
Cure Given Default	75.00%	75.00%
Impaired loans | Significant Unobservable Inputs (Level 3)
Investments in securities that are classified as level 3
Fair Value	$ 6,011	$ 8,196
Other real estate owned and other foreclosed assets | Significant Unobservable Inputs (Level 3)
Investments in securities that are classified as level 3
Fair Value	$ 2,532	$ 7,743

Fair Value Measurements (Deta76

Fair Value Measurements (Details 3) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Held-to-maturity Securities	$ 448,139	$ 375,453
Held to Maturity, Fair Value, Total	455,776	379,699
Loans, net of allowance for loan losses(b)	5,442,916	4,915,633
LIABILITIES
Federal Home Loan Bank borrowings(c)	104,133	70,080
Customer Repurchase Agreements and other short-term borrowings	138,449	147,890
Wholesale Repurchase Agreements	0	50,000
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	73,520	73,685
Subordinated Debt	35,000	65,000
Time certificates of deposits(c)
LIABILITIES
Time certificates of deposits(c)	711,263	649,620
Accrued Liabilities, Fair Value Disclosure	713,473	651,180
Federal Home Loan Bank borrowings(c)
LIABILITIES
Federal Home Loan Bank borrowings(c)	104,133	70,080
Accrued Liabilities, Fair Value Disclosure	104,989	70,208
Customer repurchase agreements and other short-term borrowings(c)
LIABILITIES
Customer Repurchase Agreements and other short-term borrowings	138,449	147,890
Accrued Liabilities, Fair Value Disclosure	138,449	147,890
Wholesale repurchase agreements(c)
LIABILITIES
Wholesale Repurchase Agreements		50,000
Accrued Liabilities, Fair Value Disclosure		50,510
Junior subordinated debentures(d)
LIABILITIES
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	73,520	73,685
Accrued Liabilities, Fair Value Disclosure	70,925	70,045
Subordinated debentures(c)
LIABILITIES
Subordinated Debt	35,000	65,000
Accrued Liabilities, Fair Value Disclosure	35,282	64,198
Significant Other Observable Inputs (Level 2) | Time certificates of deposits(c)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure	713,473	651,180
Significant Other Observable Inputs (Level 2) | Federal Home Loan Bank borrowings(c)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure	104,989	70,208
Significant Other Observable Inputs (Level 2) | Junior subordinated debentures(d)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure	70,925	70,045
Significant Unobservable Inputs (Level 3) | Customer repurchase agreements and other short-term borrowings(c)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure	138,449	147,890
Significant Unobservable Inputs (Level 3) | Wholesale repurchase agreements(c)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure		50,510
Significant Unobservable Inputs (Level 3) | Subordinated debentures(c)
LIABILITIES
Accrued Liabilities, Fair Value Disclosure	35,282	64,198
U.S. Treasury securities
ASSETS
Held-to-maturity Securities	1,009	1,010
Held to Maturity, Fair Value, Total	1,084	1,073
U.S. Treasury securities | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	1,084	1,073
Agency mortgage-backed securities
ASSETS
Held-to-maturity Securities	172,684	159,522
Held to Maturity, Fair Value, Total	178,402	164,944
Agency mortgage-backed securities | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	178,402	164,944
Agency collateralized mortgage obligations
ASSETS
Held-to-maturity Securities	230,820	198,220
Held to Maturity, Fair Value, Total	231,910	196,584
Agency collateralized mortgage obligations | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	231,910	196,584
State, county, and municipal securities
ASSETS
Held-to-maturity Securities	225	424
Held to Maturity, Fair Value, Total	229	428
State, county, and municipal securities | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	229	428
Single issuer trust preferred securities issued by banks
ASSETS
Held-to-maturity Securities	1,500	1,500
Held to Maturity, Fair Value, Total	1,496	1,477
Single issuer trust preferred securities issued by banks | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	1,496	1,477
Small Business Administration Pooled Securities [Member]
ASSETS
Held-to-maturity Securities	36,901	9,775
Held to Maturity, Fair Value, Total	37,613	10,074
Small Business Administration Pooled Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
ASSETS
Held to Maturity, Fair Value, Total	0	0
Small Business Administration Pooled Securities [Member] | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	37,613	10,074
Small Business Administration Pooled Securities [Member] | Significant Unobservable Inputs (Level 3)
ASSETS
Held to Maturity, Fair Value, Total	0	0
Corporate debt securities
ASSETS
Held-to-maturity Securities	5,000	5,002
Held to Maturity, Fair Value, Total	5,042	5,119
Corporate debt securities | Significant Other Observable Inputs (Level 2)
ASSETS
Held to Maturity, Fair Value, Total	5,042	5,119
Loans, net of allowance for loan losses(b)
ASSETS
Loans, net of allowance for loan losses(b)		4,907,437
Loans Receivable, Fair Value Disclosure	5,406,492	4,875,283
Loans, net of allowance for loan losses(b) | Significant Unobservable Inputs (Level 3)
ASSETS
Loans Receivable, Fair Value Disclosure	$ 5,406,492	$ 4,875,283

Comprehensive Income_Loss (Comp

Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
COMPREHENSIVE INCOME
Change in fair value of securities available for sale, pre tax amount	$ 1,966	$ (1,322)	$ 597	$ 5,869
Change in fair value of securities available for sale, tax (expense) benefit	(755)	512	(239)	(2,325)
Change in fair value of securities available for sale, after tax amount	1,211	(810)	358	3,544
Net Security Gains Losses Reclassified Into Earnings Before Tax Amount	0	67	(315)	138
Net Security Gains Losses Reclassified Into Earnings Tax Amount	0	(27)	129	(56)
Net Security Gains Losses Reclassified Into Earnings Net Of Tax Amount	0	40	(186)	82
Change in fair value of securities available for sale, pre tax amount	1,966	(1,389)	912	5,731
Change in fair value of securities available for sale, tax (expense) benefit	(755)	539	(368)	(2,269)
Change in fair value of securities available for sale, after tax amount	1,211	(850)	544	3,462
Change in fair value of cash flow hedges, pre tax amount	(493)	252	(1,096)	(535)
Change in fair value of cash flow hedges, tax (expense) benefit	201	(103)	429	220
Change in fair value of cash flow hedges, after tax amount	(292)	149	(667)	(315)
Less: net cash flow hedge losses reclassified into interest on borrowings expense, pre tax amount	(715)	(726)	(2,130)	(2,937)
Less: net cash flow hedge losses reclassified into earnings, tax (expense) benefit	291	297	867	1,200
Less: net cash flow hedge losses reclassified into interest on borrowings expense, after tax	(424)	(429)	(1,263)	(1,737)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, before Tax	0	0		(1,122)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, Tax		0		459
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, Net of Tax		0		(663)
Net change in fair value of cash flow hedges, pre tax amount	222	978	1,034	3,524
Net change in fair value of cash flow hedges, tax (expense) benefit	(90)	(400)	(438)	(1,439)
Net change in fair value of cash flow hedges	132	578	596	2,085
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	50	(80)	137	(240)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	(21)	32	(71)	98
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	29	(48)	66	(142)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	61	(10)	182	(32)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax	(25)	5	(74)	13
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	36	(5)	108	(19)
Amortization of certain costs included in net periodic retirement costs, pre tax amount	75	26	227	76
Amortization of certain costs included in net periodic retirement costs, tax (expense) benefit	(30)	(11)	(92)	(31)
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax	45	15	135	45
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), before Tax		(2)		(2)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), Tax		1		1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), Net of Tax		(1)		(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	186	(66)	546	(198)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(76)	27	(237)	81
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	110	(39)	309	(117)
Total other comprehensive income, pre tax amount	2,374	(477)	2,492	9,057
Total other comprehensive income, tax (expense) benefit	(921)	166	(1,043)	(3,627)
Total other comprehensive income, after tax amount	$ 1,453	$ (311)	$ 1,449	$ 5,430

Comprehensive Income_Loss (Co78

Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (2,132)	$ (7,434)
Net change in other comprehensive income (loss)	$ 1,453	$ (311)	1,449	5,430
Ending Balance	(683)	(2,004)	(683)	(2,004)
Unrealized Gain on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,389	(2,023)
Net change in other comprehensive income (loss)			544	3,462
Ending Balance	3,933	1,439	3,933	1,439
Unrealized Loss on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3,298)	(5,698)
Net change in other comprehensive income (loss)			704	2,194
Ending Balance	(2,594)	(3,504)	(2,594)	(3,504)
Deferred Gain on Hedge Transactions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			571	715
Net change in other comprehensive income (loss)			(108)	(109)
Ending Balance	463	606	463	606
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,794)	(428)
Net change in other comprehensive income (loss)			309	(117)
Ending Balance	$ (2,485)	$ (545)	$ (2,485)	$ (545)

Comprehensive Income_Loss (Deta

Comprehensive Income/Loss (Details Textual) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2012
Equity [Abstract]
Gain on interest rate swaps	$ 463	$ 606	$ 1,400

Commitments and contingencies F

Commitments and contingencies Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 2,011,329	$ 1,822,369
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	18,834	18,516
Deferred standby letter of credit fees [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 77	$ 105

Commitments and contingencies T

Commitments and contingencies Textual (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Other Commitments [Line Items]
Operating Leases, Rent Expense	$ 2,100,000	$ 1,900,000	$ 6,100,000	$ 5,800,000
Cash Reserve Deposit Required and Made	42,000,000		$ 42,000,000		$ 33,000,000
Minimum [Member]
Other Commitments [Line Items]
Operating Leases, Lease Renewal Period Option			1 year
Maximum [Member]
Other Commitments [Line Items]
Operating Leases, Lease Renewal Period Option			10 years
Affiliated Entity [Member]
Other Commitments [Line Items]
Operating Leases, Rent Expense	$ 0	$ 92,000	$ 0	$ 216,000

Investments is Low Income Hou82

Investments is Low Income Housing Tax Credits Investments in Qualified Affordable Housing Projects (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Investments in Affordable Housing Projects [Abstract]
Original investment value	$ 42,626	$ 40,541
Amortization Method Qualified Affordable Housing Project Investments	38,929	38,943
Capital commitment relating to low income housing project investments	15,272	28,004
Tax credits and benefits (1)	4,151	1,683
Amortization of investments (2)	2,840	1,089
Net income tax benefit (3)	$ 1,314	$ 594