NBT Bancorp (NBTB) 10-Q 12 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'NBT BANCORP INC	'
Entity Central Index Key	'0000790359	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	43,689,389
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'

Consolidated_Balance_Sheets_un

Consolidated Balance Sheets (unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$182,071	$157,625
Short-term interest bearing accounts	3,493	1,301
Securities available for sale, at fair value	1,377,585	1,364,881
Securities held to maturity (fair value $114,920 and $113,276, respectively)	117,896	117,283
Trading securities	6,954	5,779
Federal Reserve and Federal Home Loan Bank stock	41,458	46,864
Loans	5,482,025	5,406,795
Less allowance for loan losses	69,434	69,434
Net loans	5,412,591	5,337,361
Premises and equipment, net	87,647	88,327
Goodwill	263,634	264,997
Intangible assets, net	24,248	25,557
Bank owned life insurance	115,775	114,966
Other assets	119,777	127,234
Total assets	7,753,129	7,652,175
Liabilities	'	'
Demand (noninterest bearing)	1,616,612	1,645,641
Savings, NOW, and money market	3,482,925	3,223,441
Time	969,361	1,021,142
Total deposits	6,068,898	5,890,224
Short-term borrowings	356,878	456,042
Long-term debt	308,679	308,823
Junior subordinated debt	101,196	101,196
Other liabilities	85,276	79,321
Total liabilities	6,920,927	6,835,606
Stockholders' equity	'	'
Preferred stock, $0.01 par value. Authorized 2,500,000 shares at March 31, 2014 and December 31, 2013	0	0
Common stock, $0.01 par value. Authorized 100,000,000 shares at March 31, 2014 and December 31, 2013; issued 49,651,494 at March 31, 2014 and December 31, 2013	497	497
Additional paid-in-capital	574,071	574,152
Retained earnings	394,589	385,787
Accumulated other comprehensive loss	-11,550	-16,765
Common stock in treasury, at cost, 6,050,806 and 6,138,444 shares at March 31, 2014 and December 31, 2013, respectively	-125,405	-127,102
Total stockholders' equity	832,202	816,569
Total liabilities and stockholders' equity	$7,753,129	$7,652,175

Consolidated_Balance_Sheets_un1

Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Assets	'	'
Securities held to maturity fair value	$114,920	$113,276
Stockholders' equity	'	'
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	49,651,494	49,651,494
Common stock in treasury, at cost (in shares)	6,050,806	6,138,444

Consolidated_Statements_of_Inc

Consolidated Statements of Income (unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest, fee, and dividend income	'	'
Interest and fees on loans	$60,015	$53,695
Securities available for sale	6,757	5,746
Securities held to maturity	768	525
Other	537	403
Total interest, fee, and dividend income	68,077	60,369
Interest expense	'	'
Deposits	3,284	4,150
Short-term borrowings	231	42
Long-term debt	2,507	3,609
Junior subordinated debt	538	428
Total interest expense	6,560	8,229
Net interest income	61,517	52,140
Provision for loan losses	3,596	5,658
Net interest income after provision for loan losses	57,921	46,482
Noninterest income	'	'
Insurance and other financial services revenue	6,737	6,893
Service charges on deposit accounts	4,369	4,323
ATM and debit card fees	4,072	3,242
Retirement plan administration fees	2,918	2,682
Trust	4,446	2,913
Bank owned life insurance	1,382	849
Net securities gains	7	1,145
Other	2,346	3,182
Total noninterest income	26,277	25,229
Noninterest expense	'	'
Salaries and employee benefits	29,534	27,047
Occupancy	6,226	4,977
Data processing and communications	4,001	3,455
Professional fees and outside services	3,415	2,901
Equipment	3,116	2,582
Office supplies and postage	1,685	1,590
FDIC expenses	1,278	1,130
Advertising	739	723
Amortization of intangible assets	1,310	851
Loan collection and other real estate owned	1,040	718
Merger expenses	0	10,681
Other	5,173	4,050
Total noninterest expense	57,517	60,705
Income before income tax expense	26,681	11,006
Income tax expense	8,672	3,357
Net income	$18,009	$7,649
Earnings per share	'	'
Basic (in dollars per share)	$0.41	$0.21
Diluted (in dollars per share)	$0.41	$0.21

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Comprehensive Income (unaudited) [Abstract]	'	'
Net income	$18,009	$7,649
Other comprehensive income (loss), net of tax	'	'
Unrealized net holding gains (losses) arising during the period (pre-tax amounts of $8,623 and ($1,752))	5,208	-1,058
Reclassification adjustment for net gains related to securities available for sale included in net income (pre-tax amounts of $7 and $1,145)	-4	-691
Pension and other benefits:	'	'
Amortization of prior service cost and actuarial gains (pre-tax amounts of $19 and $826)	11	503
Total other comprehensive income (loss)	5,215	-1,246
Comprehensive income	$23,224	$6,403

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other comprehensive (loss) income, before tax	'	'
Unrealized net holding (losses) gains arising during the period, pre-tax amounts	$8,623	($1,752)
Reclassification adjustment for net gains related to securities available for sale included in net income, pre-tax amounts	7	1,145
Amortization of prior service cost and actuarial gains, pre-tax amounts	$19	$826

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (unaudited) (USD $)	Common Stock [Member]	Additional Paid-in-Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Common Stock in Treasury [Member]	Total
In Thousands
Beginning Balance at Dec. 31, 2012	$393	$346,692	$357,558	($5,880)	($116,490)	$582,273
Net income	0	0	7,649	0	0	7,649
Cash dividends	0	0	-6,758	0	0	-6,758
Net issuance of shares for acquisition	104	225,447	0	0	-5,779	219,772
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit	0	-965	0	0	606	-359
Stock-based compensation	0	1,964	0	0	0	1,964
Other comprehensive (loss) income	0	0	0	-1,246	0	-1,246
Ending Balance at Mar. 31, 2013	497	573,138	358,449	-7,126	-121,663	803,295
Beginning Balance at Dec. 31, 2013	497	574,152	385,787	-16,765	-127,102	816,569
Net income	0	0	18,009	0	0	18,009
Cash dividends	0	0	-9,207	0	0	-9,207
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit	0	-1,335	0	0	1,697	362
Stock-based compensation	0	1,254	0	0	0	1,254
Other comprehensive (loss) income	0	0	0	5,215	0	5,215
Ending Balance at Mar. 31, 2014	$497	$574,071	$394,589	($11,550)	($125,405)	$832,202

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Stockholders' Equity (unaudited) [Abstract]	'	'
Cash dividends - per share (in dollars per share)	$0.21	$0.20
Net issuance of shares for acquisition (in shares)	'	10,346,363
Treasury stock reissued in acquisition of Alliance (in shares)	'	408,957
Net issuance of shares to employee benefit plans and other stock plans, including tax benefit (in shares)	87,638	28,339

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating activities	'	'
Net income	$18,009	$7,649
Adjustments to reconcile net income to net cash provided by operating activities	'	'
Provision for loan losses	3,596	5,658
Depreciation and amortization of premises and equipment	2,046	1,791
Net accretion on securities	921	1,091
Amortization of intangible assets	1,310	851
Stock based compensation	1,254	1,964
Increase in surrender value of bank owned life insurance	-968	-849
Purchases of trading securities	-1,043	-744
Unrealized gains in trading securities	-132	-100
Deferred income tax benefit	-18	-309
Proceeds from sale of loans held for sale	439	15,417
Originations and purchases of loans held for sale	-1,418	-17,307
Net gains on sales of loans held for sale	-3	-480
Net security gains	-7	-1,145
Net gains on sales of other real estate owned	-102	-151
Proceeds from settlement of bank owned life insurance	573	0
Gains on bank owned life insurance settlement	-414	0
Net decrease in other assets	7,136	915
Net increase (decrease) in other liabilities	1,156	-9,336
Net cash provided by operating activities	32,335	4,915
Investing activities	'	'
Net cash provided by acquisitions	0	81,049
Securities available for sale:	'	'
Proceeds from maturities, calls, and principal paydowns	67,341	109,986
Proceeds from sales	0	2,607
Purchases	-70,339	-119,749
Securities held to maturity:	'	'
Proceeds from maturities, calls, and principal paydowns	5,107	6,940
Purchases	-5,217	-3,131
Proceeds from FHLB stock redemption	15,306	1,989
Net increase in loans	-78,304	-17,791
Net increase in Federal Reserve and FHLB stock	-9,900	0
Purchases of premises and equipment	-1,114	-1,006
Proceeds from sales of other real estate owned	902	1,023
Net cash (used in) provided by investing activities	-76,218	61,917
Financing activities	'	'
Net increase in deposits	178,674	118,194
Net (decrease) increase in short-term borrowings	-99,164	1,326
Repayments of long-term debt	-144	-43,757
Proceeds from the issuance of shares to employee benefit plans and other stock plans	362	-359
Cash dividends and payment for fractional shares	-9,207	-6,758
Net cash provided by financing activities	70,521	68,646
Net increase in cash and cash equivalents	26,638	135,478
Cash and cash equivalents at beginning of period	158,926	163,668
Cash and cash equivalents at end of period	185,564	299,146
Cash paid during the period for:	'	'
Interest	6,829	8,000
Income taxes paid	2,745	344
Noncash investing activities:	'	'
Loans transferred to other real estate owned	460	959
Acquisitions:	'	'
Fair value of assets acquired	0	1,503,448
Fair value of liabilities assumed	$0	$1,283,676

Description_of_Business

Description of Business	3 Months Ended
	Mar. 31, 2014
Description of Business [Abstract]	'
Description of Business	'
	Note 1.	Description of Business
	NBT Bancorp Inc. (the “Registrant” or the “Company”) is a registered financial holding company incorporated in the state of Delaware in 1986, with its principal headquarters located in Norwich, New York.  The principal assets of the Registrant consist of all of the outstanding shares of common stock of its subsidiaries, including:  NBT Bank, National Association (the “Bank”), NBT Financial Services, Inc. (“NBT Financial”), NBT Holdings, Inc. (“NBT Holdings”), Hathaway Agency, Inc., and CNBF Capital Trust I, NBT Statutory Trust I and NBT Statutory Trust II (collectively, the “Trusts”).  The Company’s principal sources of revenue are the management fees and dividends it receives from the Bank, NBT Financial and NBT Holdings.
	The Company’s business, primarily conducted through the Bank but also through its other subsidiaries, consists of providing commercial banking and financial services to customers in its market area, which includes central and upstate New York, northeastern Pennsylvania, southern New Hampshire, western Massachusetts and the greater Burlington, Vermont area.  The Company has been, and intends to continue to be, a community-oriented financial institution offering a variety of financial services.  The Company’s business philosophy is to operate as a community bank with local decision-making, principally in non-metropolitan markets, providing a broad array of banking and financial services to retail, commercial, and municipal customers.

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Basis of Presentation [Abstract]	'
Basis of Presentation	'
	Note 2.	Basis of Presentation
	The accompanying unaudited interim consolidated financial statements include the accounts of the Registrant and its wholly owned subsidiaries, the Bank, NBT Financial and NBT Holdings.  Collectively, the Registrant and its subsidiaries are referred to herein as “the Company.”  The interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the results for the interim periods in accordance with generally accepted accounting principles (“GAAP”).  These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our 2013 Annual Report on Form 10-K. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period.  All intercompany transactions have been eliminated in consolidation. Amounts in the prior period financial statements are reclassified whenever necessary to conform to current period presentation.  The Company has evaluated subsequent events for potential recognition and/or disclosure and there were none identified.

Securities

Securities	3 Months Ended
	Mar. 31, 2014
Securities [Abstract]	'
Securities	'
	Note 3.	Securities
	The amortized cost, estimated fair value, and unrealized gains and losses of securities available for sale are as follows:
	(In thousands)		Amortized		Unrealized			Unrealized		Estimated
			cost		gains			losses		fair value
	31-Mar-14
	U.S. Treasury		$	33,204	$	269		$	-	$	33,473
	Federal Agency			305,245		430			5,517		300,158
	State & municipal			111,583		1,967			855		112,695
	Mortgage-backed:
	Government-sponsored enterprises			351,748		6,164			1,404		356,508
	U.S. government agency securities			20,781		940			71		21,650
	Collateralized mortgage obligations:
	Government-sponsored enterprises			501,563		2,080			13,411		490,232
	U.S. government agency securities			46,876		656			117		47,415
	Other securities			12,839		2,851			236		15,454
	Total securities available for sale		$	1,383,839	$	15,357		$	21,611	$	1,377,585
	31-Dec-13
	U.S. Treasury		$	43,279	$	337		$	-	$	43,616
	Federal Agency			285,880		343			7,308		278,915
	State & municipal			113,435		1,842			1,612		113,665
	Mortgage-backed:
	Government-sponsored enterprises			337,666		5,788			2,131		341,323
	U.S. government agency securities			21,924		1,002			85		22,841
	Collateralized mortgage obligations:
	Government-sponsored enterprises			521,257		1,777			18,141		504,893
	U.S. government agency securities			43,943		794			102		44,635
	Other securities			12,367		2,854			228		14,993
	Total securities available for sale		$	1,379,751	$	14,737		$	29,607	$	1,364,881
	Other securities primarily represent marketable equity securities.
	There were no sales of securities available for sale during the three months ended March 31, 2014.  Proceeds from the sales of securities available for sale were $2.6 million during the three months ended March 31, 2013, and gains on the sales were $1.1 million.  There were no losses on the sales during 2013.
	Securities with amortized costs totaling $1.5 billion at March 31, 2014 and $1.4 billion at December 31, 2013 were pledged to secure public deposits and for other purposes required or permitted by law.  Additionally, at March 31, 2014 and December 31, 2013, securities with an amortized cost of $224.9 million and $218.4 million, respectively, were pledged as collateral for securities sold under repurchase agreements.
	The amortized cost, estimated fair value, and unrealized gains and losses of securities held to maturity are as follows:
			Amortized		Unrealized			Unrealized		Estimated
	(In thousands)		cost		gains			losses		fair value
	31-Mar-14
	Mortgage-backed		$	881	$	120		$	-	$	1,001
	Collateralized mortgage obligations			60,973		-			3,444		57,529
	State & municipal			56,042		361			13		56,390
	Total securities held to maturity		$	117,896	$	481		$	3,457	$	114,920
	31-Dec-13
	Mortgage-backed		$	953	$	128		$	-	$	1,081
	Collateralized mortgage obligations			62,025		-			4,569		57,456
	State & municipal			54,305		442			8		54,739
	Total securities held to maturity		$	117,283	$	570		$	4,577	$	113,276
	The following table sets forth information with regard to investment securities with unrealized losses at March 31, 2014 and December 31, 2013:
			Less than 12 months							12 months or longer							Total
	Security Type:		Fair Value		Unrealized			Number		Fair Value		Unrealized			Number		Fair Value		Unrealized			Number
					losses			of				losses			of				losses			of
								Positions							Positions							Positions
	31-Mar-14
	Investment securities available for sale:
	Federal agency		$	245,397	$	(5,221	)		21	$	9,704	$	(296	)		1	$	255,101	$	(5,517	)		22
	State & municipal			48,377		(839	)		171		934		(16	)		3		49,311		(855	)		174
	Mortgage-backed			1,110,605		(1,465	)		58		960		(10	)		4		1,111,565		(1,475	)		62
	Collateralized mortgage obligations			295,408		(10,516	)		31		60,681		(3,012	)		4		356,089		(13,528	)		35
	Other securities			5,507		(186	)		2		198		(50	)		1		5,705		(236	)		3
	Total securities with unrealized losses		$	1,705,294	$	(18,227	)		283	$	72,477	$	(3,384	)		13	$	1,777,771	$	(21,611	)		296
	31-Mar-14
	Investment securities held to maturity:
	Collateralized mortgage obligations		$	57,528	$	(3,444	)		5	$	-	$	-			-	$	57,528	$	(3,444	)		5
	State & municipal			2,120		(13	)		3		-		-			-		2,120		(13	)		3
	Total securities with unrealized losses		$	59,648	$	(3,457	)		8	$	-	$	-			-	$	59,648	$	(3,457	)		8
	31-Dec-13
Investment securities available for sale:
Federal agency		$	233,935	$	(6,927	)		20	$	9,619	$	(381	)		1	$	243,554	$	(7,308	)		21
State & municipal			50,328		(1,612	)		177		-		-			-		50,328		(1,612	)		177
Mortgage-backed			143,080		(2,216	)		79		-		-			-		143,080		(2,216	)		79
Collateralized mortgage obligations			379,273		(18,243	)		36		-		-			-		379,273		(18,243	)		36
Other securities			5,490		(203	)		2		223		(25	)		1		5,713		(228	)		3
Total securities with unrealized losses		$	812,106	$	(29,201	)		314	$	9,842	$	(406	)		2	$	821,948	$	(29,607	)		316
31-Dec-13
Investment securities held to maturity:
Collateralized mortgage obligations		$	57,456	$	(4,569	)		5	$	-	$	-			-	$	57,456	$	(4,569	)		5
State & municipal			1,012		(8	)		1		-		-			-		1,012		(8	)		1
Total securities with unrealized losses		$	58,468	$	(4,577	)		6	$	-	$	-			-	$	58,468	$	(4,577	)		6
Declines in the fair value of held-to-maturity and available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses or in other comprehensive income, depending on whether the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss.  If the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss, the other-than-temporary impairment shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis and its fair value at the balance sheet date.  If the Company does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss, the other-than-temporary impairment shall be separated into (a) the amount representing the credit loss and (b) the amount related to all other factors.  The amount of the total other-than-temporary impairment related to the credit loss shall be recognized in earnings. The amount of the total other-than-temporary impairment related to other factors shall be recognized in other comprehensive income, net of applicable taxes.
In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the historical and implied volatility of the fair value of the security.
Management has the intent to hold the securities classified as held to maturity until they mature, at which time it is believed the Company will receive full value for the securities. Furthermore, as of March 31, 2014, management also had the intent to hold, and will not be required to sell, the securities classified as available for sale for a period of time sufficient for a recovery of cost, which may be until maturity.  The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying securities were purchased. When necessary, the Company has performed a discounted cash flow analysis to determine whether or not it will receive the contractual principal and interest on certain securities.  The fair value is expected to recover as the bonds approach their maturity date or repricing date or if market yields for such investments decline.  As of March 31, 2014, management believes the impairments detailed in the table above are temporary and no other-than-temporary impairment losses have been realized in the Company’s consolidated statements of income.
The following tables set forth information with regard to contractual maturities of debt securities at March 31, 2014:
(In thousands)		Amortized		Estimated fair
		cost		value
Debt securities classified as available for sale
Within one year		$	27,461	$	27,627
From one to five years			302,113		301,603
From five to ten years			259,225		259,821
After ten years			782,201		773,080
		$	1,371,000	$	1,362,131
Debt securities classified as held to maturity
Within one year		$	24,714	$	24,765
From one to five years			21,654		21,957
From five to ten years			8,401		8,395
After ten years			63,127		59,803
		$	117,896	$	114,920
Maturities of mortgage-backed, collateralized mortgage obligations and asset-backed securities are stated based on their estimated average lives.  Actual maturities may differ from estimated average lives or contractual maturities because, in certain cases, borrowers have the right to call or prepay obligations with or without call or prepayment penalties.
Except for U.S. Government securities, there were no holdings, when taken in the aggregate, of any single issuer that exceeded 10% of consolidated stockholders’ equity at March 31, 2014.

Allowance_for_Loan_Losses_and_

Allowance for Loan Losses and Credit Quality of Loans	3 Months Ended
	Mar. 31, 2014
Allowance for Loan Losses and Credit Quality of Loans [Abstract]	'
Allowance for Loan Losses and Credit Quality of Loans	'
	Note  4.	Allowance for Loan Losses and Credit Quality of Loans
	Allowance for Loan Losses
	The allowance for loan losses is maintained at a level estimated by management to provide adequately for risk of probable losses inherent in the current loan portfolio. The adequacy of the allowance for loan losses is continuously monitored.  It is assessed for adequacy using a methodology designed to ensure the level of the allowance reasonably reflects the loan portfolio’s risk profile. It is evaluated to ensure that it is sufficient to absorb all reasonably estimable credit losses inherent in the current loan portfolio.
	To develop and document a systematic methodology for determining the allowance for loan losses, the Company has divided the loan portfolio into three segments, each with different risk characteristics and methodologies for assessing risk.  Those segments are further segregated between our loans accounted for under the amortized cost method (referred to as “originated” loans) and loans acquired in a business combination (referred to as “acquired” loans).  Each portfolio segment is broken down into class segments where appropriate.  Class segments contain unique measurement attributes, risk characteristics and methods for monitoring and assessing risk that are necessary to develop the allowance for loan losses.  Unique characteristics such as borrower type, loan type, collateral type, and risk characteristics define each class segment.  The following table illustrates the portfolio and class segments for the Company’s loan portfolio:
	Portfolio		Class
	Commercial Loans		Commercial
			Commercial Real Estate
			Agricultural
			Agricultural Real Estate
			Business Banking
	Consumer Loans		Indirect
			Home Equity
			Direct
	Residential Real Estate Mortgages
	Commercial Loans
	The Company offers a variety of commercial loan products including commercial (non-real estate), commercial real estate, agricultural, agricultural real estate, and business banking loans.  The Company’s underwriting analysis for commercial loans typically includes credit verification, independent appraisals, a review of the borrower’s financial condition, and a detailed analysis of the borrower’s underlying cash flows.
	Commercial – The Company offers a variety of loan options to meet the specific needs of our commercial customers including term loans, time notes and lines of credit.  Such loans are made available to businesses for working capital needs such as inventory and receivables, business expansion and equipment purchases. Generally, a collateral lien is placed on equipment or other assets owned by the borrower.  These loans carry a higher risk than commercial real estate loans due to the nature of the underlying collateral, which can be business assets such as equipment and accounts receivable. To reduce the risk, management also attempts to secure real estate as collateral and obtain personal guarantees of the borrowers.
	Commercial Real Estate – The Company offers commercial real estate loans to finance real estate purchases, refinancings, expansions and improvements to commercial properties.  Commercial real estate loans are made to finance the purchases of real estate, generally with completed structures. These commercial real estate loans are secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities, and other non owner-occupied facilities.  These loans are typically less risky than commercial loans, since they are secured by real estate and buildings, and are generally originated in amounts of no more than 80% of the appraised value of the property.
	Agricultural – The Company offers a variety of agricultural loans to meet the needs of our agricultural customers including term loans, time notes, and lines of credit.  These loans are made to purchase livestock, purchase and modernize equipment, and finance seasonal crop expenses.  Generally, a collateral lien is placed on the livestock, equipment, produce inventories, and/or receivables owned by the borrower.  These loans may carry a higher risk than commercial and agricultural real estate loans due to the industry price volatility, and in some cases, the perishable nature of the underlying collateral.  To reduce these risks, management may attempt to secure these loans with additional real estate collateral, obtain personal guarantees of the borrowers, or obtain government loan guarantees to provide further support.
	Agricultural Real Estate – The Company offers real estate loans to our agricultural customers to finance farm related real estate purchases, refinancings, expansions, and improvements to agricultural properties such as barns, production facilities, and land.  The agricultural real estate loans are secured by first liens on the farm real estate.  Because they are secured by land and buildings, these loans may be less risky than agricultural loans.  These loans are typically originated in amounts of no more than 75% of the appraised value of the property.  Government loan guarantees may be obtained to provide further support.
	Business Banking - The Company offers a variety of loan options to meet the specific needs of our business banking customers including term loans, business banking mortgages and lines of credit.  Such loans are generally less than $0.5 million and are made available to businesses for working capital such as inventory and receivables, business expansion, equipment purchases, and agricultural needs.  Generally, a collateral lien is placed on equipment or other assets owned by the borrower such as inventory and/or receivables.  These loans carry a higher risk than commercial loans due to the smaller size of the borrower and lower levels of capital.  To reduce the risk, the Company obtains personal guarantees of the owners for a majority of the loans.
	Consumer Loans
	The Company offers a variety of consumer loan products including indirect, home equity, and direct loans.
	Indirect – The Company maintains relationships with many dealers primarily in the communities that we serve.  Through these relationships, the company primarily finances the purchases of automobiles and recreational vehicles (such as campers, boats, etc.) indirectly through dealer relationships.  Approximately 75% of the indirect relationships represent automobile financing.  Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from three to six years, based upon the nature of the collateral and the size of the loan. The majority of indirect consumer loans are underwritten on a secured basis using the underlying collateral being financed.
	Home Equity – The Company offers fixed home equity loans as well as home equity lines of credit to consumers to finance home improvements, debt consolidation, education and other uses.  Consumers are able to borrow up to 85% of the equity in their homes.  The Company originates home equity lines of credit and second mortgage loans (loans secured by a second junior lien position on one-to-four-family residential real estate).  These loans carry a higher risk than first mortgage residential loans as they are in a second position with respect to collateral.  Risk is reduced through underwriting criteria, which include credit verification, appraisals, a review of the borrower's financial condition, and personal cash flows.  A security interest, with title insurance when necessary, is taken in the underlying real estate.
	Direct – The Company offers a variety of consumer installment loans to finance vehicle purchases, mobile home purchases and personal expenditures.  Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from one to ten years, based upon the nature of the collateral and the size of the loan. The majority of consumer loans are underwritten on a secured basis using the underlying collateral being financed or a customer's deposit account. In addition to installment loans, the Company also offers personal lines of credit and overdraft protection.  A minimal amount of loans are unsecured, which carry a higher risk of loss.
	Residential Real Estate Mortgages
	Residential real estate loans consist primarily of loans secured by first or second deeds of trust on primary residences.  We originate adjustable-rate and fixed-rate, one-to-four-family residential real estate loans for the construction, purchase or refinancing of a mortgage.  These loans are collateralized by owner-occupied properties located in the Company’s market area.  Loans on one-to-four-family residential real estate are generally originated in amounts of no more than 85% of the purchase price or appraised value (whichever is lower), or have private mortgage insurance.  The Company’s underwriting analysis for residential mortgage loans typically includes credit verification, independent appraisals, and a review of the borrower’s financial condition.  Mortgage title insurance and hazard insurance are normally required. Construction loans have a unique risk, because they are secured by an incomplete dwelling. This risk is reduced through periodic site inspections, including one at each loan draw period.
	For purposes of evaluating the adequacy of the allowance, the Company considers a number of significant factors that affect the collectability of the portfolio.  For individually analyzed loans, these include estimates of loss exposure, which reflect the facts and circumstances that affect the likelihood of repayment of such loans as of the evaluation date. For homogeneous pools of loans, estimates of the Company’s exposure to credit loss reflect a current assessment of a number of factors, which could affect collectability.  These factors include:  past loss experience;  size, trend, composition, and nature of loans;  changes in lending policies and procedures, including underwriting standards and collection,  charge-offs  and  recoveries; trends experienced in nonperforming and delinquent loans; current economic conditions in the Company’s market;  portfolio concentrations that may affect loss experienced across one or more components of the portfolio; the effect of external factors such as competition, legal and regulatory requirements; and the experience, ability, and depth of lending management and staff. In addition, various regulatory agencies, as an integral component of their examination process, periodically review the Company’s allowance for loan losses.  Such agencies may require the Company to make loan grade changes as well as recognize additions to the allowance based on their examinations.
	After a thorough consideration of the factors discussed above, any required additions or reductions to the allowance for loan losses are made periodically by charges or credits to the provision for loan losses. These charges or credits are necessary to maintain the allowance at a level which management believes is reasonably reflective of overall inherent risk of probable loss in the portfolio. While management uses available information to recognize losses on loans, additions and reductions of the allowance may fluctuate from one reporting period to another.  These fluctuations are reflective of changes in risk associated with portfolio content and/or changes in management’s assessment of any or all of the determining factors discussed above.
	The following tables illustrate the changes in the allowance for loan losses by our portfolio segments for the three months ended March 31, 2014 and 2013:
									Residential
	Three months ended March 31		Commercial			Consumer			Real Estate
			Loans			Loans			Mortgages			Unallocated		Total
	Balance as of December 31, 2013		$	35,090		$	27,694		$	6,520		$	130	$	69,434
	Charge-offs			(479	)		(4,032	)		(319	)		-		(4,830	)
	Recoveries			399			741			94			-		1,234
	Provision			(573	)		4,033			(70	)		206		3,596
	Ending Balance as of March 31, 2014		$	34,437		$	28,436		$	6,225		$	336	$	69,434
	Balance as of December 31, 2012		$	35,624		$	27,162		$	6,252		$	296	$	69,334
	Charge-offs			(3,322	)		(3,723	)		(671	)		-		(7,716	)
	Recoveries			467			977			14			-		1,458
	Provision			2,589			1,869			1,113			87		5,658
	Ending Balance as of March 31, 2013		$	35,358		$	26,285		$	6,708		$	383	$	68,734
	For acquired loans, to the extent that we experience deterioration in borrower credit quality resulting in a decrease in our expected cash flows subsequent to acquisition of the loans, an allowance for loan losses would be established based on our estimate of future credit losses over the remaining life of the loans.  As of March 31, 2014 and 2013, there was no allowance for loan losses for the acquired loan portfolio. Net charge-offs related to acquired loans totaled approximately $0.2 million during the three months ended March 31, 2014 and 2013, and are included in the table above.
	The following tables illustrate the allowance for loan losses and the recorded investment by portfolio segments as of March 31, 2014 and December 31, 2013:
	Allowance for Loan Losses and Recorded Investment in Loans
	(in thousands)
									Residential
			Commercial			Consumer			Real Estate
			Loans			Loans			Mortgages			Unallocated		Total
	As of March 31, 2014
	Allowance for loan losses		$	34,437		$	28,436		$	6,225		$	336	$	69,434
	Allowance for loans individually evaluated for impairment			925			-			-					925
	Allowance for loans collectively evaluated for impairment		$	33,512		$	28,436		$	6,225		$	336	$	68,509
	Ending balance of loans		$	2,436,202		$	1,989,030		$	1,056,793				$	5,482,025
	Ending balance of originated loans individually evaluated for impairment			15,025			4,248			2,722					21,995
	Ending balance of acquired loans individually evaluated for impairment			9,873			-			-					9,873
	Ending balance of acquired loans collectively evaluated for impairment			385,669			199,196			300,360					885,225
	Ending balance of originated loans collectively evaluated for impairment		$	2,025,635		$	1,785,586		$	753,711				$	4,564,932
	As of December 31, 2013
	Allowance for loan losses		$	35,090		$	27,694		$	6,520		$	130	$	69,434
	Allowance for loans individually evaluated for impairment			715			-			-					715
Allowance for loans collectively evaluated for impairment		$	34,375		$	27,694		$	6,520		$	130	$	68,719
Ending balance of loans		$	2,392,621		$	1,972,537		$	1,041,637				$	5,406,795
Ending balance of originated loans individually evaluated for impairment			16,120			3,248			2,012					21,380
Ending balance of acquired loans individually evaluated for impairment			10,060			-			-					10,060
Ending balance of acquired loans collectively evaluated for impairment			392,329			219,587			308,416					920,332
Ending balance of originated loans collectively evaluated for impairment		$	1,974,112		$	1,749,702		$	731,209				$	4,455,023
Credit Quality of Loans
Loans are placed on nonaccrual status when timely collection of principal and interest in accordance with contractual terms is doubtful. Loans are transferred to nonaccrual status generally when principal or interest payments become ninety days delinquent, unless the loan is well secured and in the process of collection, or sooner when management concludes or circumstances indicate that borrowers may be unable to meet contractual principal or interest payments.  When a loan is transferred to a nonaccrual status, all interest previously accrued in the current period but not collected is reversed against interest income in that period. Interest accrued in a prior period and not collected is charged-off against the allowance for loan losses.  The Company’s nonaccrual policies are the same for all classes of financing receivable.
If ultimate repayment of a nonaccrual loan is expected, any payments received are applied in accordance with contractual terms. If ultimate repayment of principal is not expected, any payment received on a nonaccrual loan is applied to principal until ultimate repayment becomes expected.  Nonaccrual loans are returned to accrual status when they become current as to principal and interest and demonstrate a period of performance under the contractual terms and, in the opinion of management, are fully collectible as to principal and interest.  When in the opinion of management the collection of principal appears unlikely, the loan balance is charged-off in total or in part.  For loans in all portfolios, the principal amount is charged off in full or in part as soon as management determines, based on available facts, that the collection of principal in full is improbable.  For commercial loans, management considers specific facts and circumstances relative to individual credits in making such a determination.  For consumer and residential loan classes, management uses specific guidance and thresholds from the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy.
The following table illustrates the Company’s nonaccrual loans by loan class:
Loans on Nonaccrual Status as of:
(In thousands)		31-Mar-14			31-Dec-13
ORIGINATED
Commercial Loans
Commercial		$	3,644		$	3,669
Commercial Real Estate			7,282			7,834
Agricultural			1,366			1,135
Agricultural Real Estate			1,758			961
Business Banking			5,708			5,701
			19,758			19,300
Consumer Loans
Indirect			1,549			1,461
Home Equity			7,074			5,931
Direct			76			86
			8,699			7,478
Residential Real Estate Mortgages			6,905			7,105
		$	35,362		$	33,883
ACQUIRED
Commercial Loans
Commercial		$	6,477		$	6,599
Commercial Real Estate			3,493			3,559
Business Banking			1,037			1,340
			11,007			11,498
Consumer Loans
Indirect			129			93
Home Equity			808			570
Direct			38			49
			975			712
Residential Real Estate Mortgages			4,120			3,872
		$	16,102		$	16,082
TOTAL NONACCRUAL LOANS		$	51,464		$	49,965
The following tables set forth information with regard to past due and nonperforming loans by loan class as of March 31, 2014 and December 31, 2013:
Age Analysis of Past Due Financing Receivables
As of March 31, 2014
(in thousands)
								Greater Than
		31-60 Days			61-90 Days			90 Days			Total							Recorded
		Past Due			Past Due			Past Due			Past Due							Total
		Accruing			Accruing			Accruing			Accruing		Non-Accrual			Current		Loans
ORIGINATED
Commercial Loans
Commercial		$	-		$	409		$	-		$	409	$	3,644		$	631,041	$	635,094
Commercial Real Estate			367			69			-			436		7,282			959,156		966,874
Agricultural			-			-			-			-		1,366			60,979		62,345
Agricultural Real Estate			136			-			-			136		1,758			36,719		38,613
Business Banking			1,151			159			158			1,468		5,708			330,558		337,734
			1,654			637			158			2,449		19,758			2,018,453		2,040,660
Consumer Loans
Indirect			9,189			2,061			1,286			12,536		1,549			1,203,341		1,217,426
Home Equity			5,403			2,032			583			8,018		7,074			502,372		517,464
Direct			413			90			52			555		76			54,313		54,944
			15,005			4,183			1,921			21,109		8,699			1,760,026		1,789,834
Residential Real Estate Mortgages			3,307			1,076			444			4,827		6,905			744,701		756,433
		$	19,966		$	5,896		$	2,523		$	28,385	$	35,362		$	4,523,180	$	4,586,927
ACQUIRED
Commercial Loans
Commercial		$	150		$	-		$	-		$	150	$	6,477		$	97,406	$	104,033
Commercial Real Estate			-			-			-			-		3,493			219,524		223,017
Business Banking			45			-			-			45		1,037			67,410		68,492
			195			-			-			195		11,007			384,340		395,542
Consumer Loans
Indirect			575			84			50			709		129			107,501		108,339
Home Equity			288			93			112			493		808			83,044		84,345
Direct			99			8			15			122		38			6,352		6,512
			962			185			177			1,324		975			196,897		199,196
Residential Real Estate Mortgages			1,329			39			-			1,368		4,120			294,872		300,360
		$	2,486		$	224		$	177		$	2,887	$	16,102		$	876,109	$	895,098
Total Loans		$	22,452		$	6,120		$	2,700		$	31,272	$	51,464		$	5,399,289	$	5,482,025
Age Analysis of Past Due Financing Receivables
As of December 31, 2013
(in thousands)
								Greater Than
		31-60 Days			61-90 Days			90 Days			Total							Recorded
		Past Due			Past Due			Past Due			Past Due							Total
		Accruing			Accruing			Accruing			Accruing		Non-Accrual			Current		Loans
ORIGINATED
Commercial Loans
Commercial		$	105		$	247		$	-		$	352	$	3,669		$	612,402	$	616,423
Commercial Real Estate			1,366			-			-			1,366		7,834			925,116		934,316
Agricultural			150			21			-			171		1,135			63,856		65,162
Agricultural Real Estate			519			-			-			519		961			35,172		36,652
Business Banking			1,228			122			105			1,455		5,701			330,523		337,679
			3,368			390			105			3,863		19,300			1,967,069		1,990,232
Consumer Loans
Indirect			14,093			2,878			1,583			18,554		1,461			1,141,829		1,161,844
Home Equity			6,033			1,888			1,115			9,036		5,931			517,856		532,823
Direct			679			125			46			850		86			57,347		58,283
			20,805			4,891			2,744			28,440		7,478			1,717,032		1,752,950
Residential Real Estate Mortgages			3,951			379			808			5,138		7,105			720,978		733,221
		$	28,124		$	5,660		$	3,657		$	37,441	$	33,883		$	4,405,079	$	4,476,403
ACQUIRED
Commercial Loans
Commercial		$	24		$	-		$	-		$	24	$	6,599		$	96,603	$	103,226
Commercial Real Estate			-			-			-			-		3,559			225,455		229,014
Business Banking			320			2			-			322		1,340			68,487		70,149
			344			2			-			346		11,498			390,545		402,389
Consumer Loans
Indirect			939			113			71			1,123		93			123,870		125,086
Home Equity			753			63			-			816		570			85,690		87,076
Direct			76			56			9			141		49			7,235		7,425
			1,768			232			80			2,080		712			216,795		219,587
Residential Real Estate Mortgages			1,725			-			-			1,725		3,872			302,819		308,416
		$	3,837		$	234		$	80		$	4,151	$	16,082		$	910,159	$	930,392
Total Loans		$	31,961		$	5,894		$	3,737		$	41,592	$	49,965		$	5,315,238	$	5,406,795
There were no material commitments to extend further credit to borrowers with nonperforming loans.
Impaired Loans
The methodology used to establish the allowance for loan losses on impaired loans incorporates specific allocations on loans analyzed individually.  Classified and nonperforming loans and troubled debt restructured loans (“TDR”) with outstanding balances of $0.5 million or more are evaluated for impairment through the Company’s quarterly status review process.  In determining that we will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreements, we consider factors such as payment history and changes in the financial condition of individual borrowers, local economic conditions, historical loss experience and the conditions of the various markets in which the collateral may be liquidated.  For loans that are impaired as defined by accounting standards, impairment is measured by one of three methods: 1) the fair value of collateral less cost to sell, 2) present value of expected future cash flows or 3) the loan’s observable market price.  All impaired loans are reviewed on a quarterly basis for changes in the measurement of impairment.  Any change to the previously recognized impairment loss is recognized as a change to the allowance account and recorded in the consolidated statement of income as a component of the provision for credit losses.
The following table provides information on loans specifically evaluated for impairment as of March 31, 2014 and December 31, 2013:
		31-Mar-14									31-Dec-13
		Recorded			Unpaid						Recorded		Unpaid
		Investment			Principal						Investment		Principal
		Balance			Balance			Related			Balance		Balance			Related
(in thousands)		(Book)			(Legal)			Allowance			(Book)		(Legal)			Allowance
ORIGINATED
With no related allowance recorded:
Commercial Loans
Commercial		$	2,026		$	2,096					$	4,721	$	4,777
Commercial Real Estate			7,252			7,823						4,613		5,164
Agricultural			124			195						125		195
Agricultural Real Estate			1,418			1,697						1,431		1,708
Business Banking			172			564						210		602
Total Commercial Loans			10,992			12,375						11,100		12,446
Consumer Loans
Home Equity			4,248			4,534						3,248		3,472
Residential Real Estate Mortgages			2,722			3,036						2,012		2,255
Total			17,962			19,945						16,360		18,173
With an allowance recorded:
Commercial Loans
Commercial Real Estate			4,033			5,890			925			5,020		6,877			715
ACQUIRED
With no related allowance recorded:
Commercial Loans
Commercial			6,380			6,538						6,501		6,538
Commercial Real Estate			3,493			3,842						3,559		3,842
Total Commercial Loans			9,873			10,380						10,060		10,380
Total:		$	31,868		$	36,215		$	925		$	31,440	$	35,430		$	715
The following tables summarize the average recorded investments on impaired loans specifically evaluated for impairment and the interest income recognized for the three ended March 31, 2014 and 2013:
		For the three months ended
		31-Mar-14						31-Mar-13
		Average						Average
		Recorded			Interest Income			Recorded			Interest Income
(in thousands)		Investment			Recognized			Investment			Recognized
ORIGINATED
Commercial Loans
Commercial		$	2,038		$	-		$	5,069		$	29
Commercial Real Estate			11,553			42			12,339			72
Agricultural			125			-			378			3
Agricultural Real Estate			1,424			12			900			12
Business Banking			185			12			80			-
Consumer Loans
Home Equity			4,282			43			2,901			29
Residential Real Estate Mortgage			2,727			23			2,065			11
Total Originated		$	22,334		$	132		$	23,732		$	156
ACQUIRED
Commercial Loans
Commercial			6,436			-			-			-
Commercial Real Estate			3,524			-			-			-
TotalAcquired		$	9,960		$	-		$	-		$	-
Total Loans		$	32,294		$	132		$	23,732		$	156
Credit Quality Indicators
The Company has developed an internal loan grading system to evaluate and quantify the Company’s loan portfolio with respect to quality and risk.  The system focuses on, among other things, financial strength of borrowers, experience and depth of borrower’s management, primary and secondary sources of repayment, payment history, nature of the business, and outlook on particular industries.  The internal grading system enables the Company to monitor the quality of the entire loan portfolio on a consistent basis and provide management with an early warning system, enabling recognition and response to problem loans and potential problem loans.
Commercial Grading System
For commercial and agricultural loans, the Company uses a grading system that relies on quantifiable and measurable characteristics when available.  This would include comparison of financial strength to available industry averages, comparison of transaction factors (loan terms and conditions) to loan policy, and comparison of credit history to stated repayment terms and industry averages. Some grading factors are necessarily more subjective such as economic and industry factors, regulatory environment, and management.  Classified commercial loans consist of loans graded substandard and below.  The grading system for commercial and agricultural loans is as follows:
	·	Doubtful
A doubtful loan has a high probability of total or substantial loss, but because of specific pending events that may strengthen the asset, its classification as a loss is deferred. Doubtful borrowers are usually in default, lack adequate liquidity or capital, and lack the resources necessary to remain an operating entity. Pending events can include mergers, acquisitions, liquidations, capital injections, the perfection of liens on additional collateral, the valuation of collateral, and refinancing. Generally, pending events should be resolved within a relatively short period and the ratings will be adjusted based on the new information. Nonaccrual treatment is required for doubtful assets because of the high probability of loss.
	·	Substandard
Substandard loans have a high probability of payment default, or they have other well-defined weaknesses. They require more intensive supervision by bank management. Substandard loans are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization. Repayment may depend on collateral or other credit risk mitigants. For some Substandard loans, the likelihood of full collection of interest and principal may be in doubt and those loans should be placed on nonaccrual. Although Substandard assets in the aggregate will have a distinct potential for loss, an individual asset’s loss potential does not have to be distinct for the asset to be rated Substandard.
	·	Special Mention
Special Mention loans have potential weaknesses that may, if not checked or corrected, weaken the asset or inadequately protect the Company’s position at some future date. These loans pose elevated risk, but their weakness does not yet justify a Substandard classification. Borrowers may be experiencing adverse operating trends (declining revenues or margins) or may be struggling with an ill-proportioned balance sheet (e.g., increasing inventory without an increase in sales, high leverage, tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a Special Mention rating. Although a Special Mention loan has a higher probability of default than a pass asset, its default is not imminent.
	·	Pass
Loans graded as Pass encompass all loans not graded as Doubtful, Substandard, or Special Mention.  Pass loans are in compliance with loan covenants, and payments are generally made as agreed.  Pass loans range from superior quality to fair quality.
Business Banking Grading System
Business banking loans are graded as either Classified or Non-classified:
	·	Classified
Classified loans are inadequately protected by the current worth and paying capacity of the obligor or, if applicable, the collateral pledged.   These loans have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt, or in some cases make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected.   Classified loans have a high probability of payment default, or a high probability of total or substantial loss.  These loans require more intensive supervision by management and are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization.  Repayment may depend on collateral or other credit risk mitigants.  When the likelihood of full collection of interest and principal may be in doubt; classified loans are considered to have a nonaccrual status.   In some cases, Classified loans are considered uncollectible and of such little value that their continuance as assets is not warranted.
	·	Non-classified
Loans graded as Non-classified encompass all loans not graded as Classified.  Non-classified loans are in compliance with loan covenants, and payments are generally made as agreed.
Consumer and Residential Mortgage Grading System
Consumer and Residential Mortgage loans are graded as either Performing or Nonperforming.   Nonperforming loans are loans that are 1) over 90 days past due and interest is still accruing, 2) on nonaccrual status or 3) restructured.  All loans not meeting any of these three criteria are considered Performing.
The following tables illustrate the Company’s credit quality by loan class as of March 31, 2014 and December 31, 2013:
Credit Quality Indicators
As of March 31, 2014
ORIGINATED
Commercial Credit Exposure					Commercial						Agricultural
By Internally Assigned Grade:		Commercial			Real Estate			Agricultural			Real Estate		Total
Pass		$	585,553		$	910,431		$	57,573		$	34,754	$	1,588,311
Special Mention			12,755			20,924			366			7		34,052
Substandard			36,786			35,519			4,394			3,852		80,551
Doubtful			-			-			12			-		12
Total		$	635,094		$	966,874		$	62,345		$	38,613	$	1,702,926
Business Banking Credit Exposure
By Internally Assigned Grade:		Business Banking											Total
Non-classified		$	319,727										$	319,727
Classified			18,007											18,007
Total		$	337,734										$	337,734
Consumer Credit Exposure
By Payment Activity:		Indirect			Home Equity			Direct					Total
Performing		$	1,214,591		$	509,807		$	54,816				$	1,779,214
Nonperforming			2,835			7,657			128					10,620
Total		$	1,217,426		$	517,464		$	54,944				$	1,789,834
Residential Mortgage Credit Exposure		Residential
By Payment Activity:		Mortgage											Total
Performing		$	749,084										$	749,084
Nonperforming			7,349											7,349
Total		$	756,433										$	756,433
Credit Quality Indicators
As of March 31, 2014
ACQUIRED
Commercial Credit Exposure					Commercial
By Internally Assigned Grade:		Commercial			Real Estate			Agricultural			Total
Pass		$	88,439		$	204,582		$	-		$	293,021
Special Mention			2,010			2,699			-			4,709
Substandard			13,584			15,736			-			29,320
Doubtful			-			-			-			-
Total		$	104,033		$	223,017		$	-		$	327,050
Business Banking Credit Exposure
By Internally Assigned Grade:		Business Banking									Total
Non-classified		$	63,332								$	63,332
Classified			5,160									5,160
Total		$	68,492								$	68,492
Consumer Credit Exposure
By Payment Activity:		Indirect			Home Equity			Direct			Total
Performing		$	108,160		$	83,425		$	6,459		$	198,044
Nonperforming			179			920			53			1,152
Total		$	108,339		$	84,345		$	6,512		$	199,196
Residential Mortgage Credit Exposure		Residential
By Payment Activity:		Mortgage									Total
Performing		$	296,240								$	296,240
Nonperforming			4,120									4,120
Total		$	300,360								$	300,360
Credit Quality Indicators
As of December 31, 2013
ORIGINATED
Commercial Credit Exposure					Commercial						Agricultural
By Internally Assigned Grade:		Commercial			Real Estate			Agricultural			Real Estate		Total
Pass		$	576,079		$	878,411		$	60,043		$	33,136	$	1,547,669
Special Mention			16,836			22,777			381			43		40,037
Substandard			23,508			33,128			4,726			3,473		64,835
Doubtful			-			-			12			-		12
Total		$	616,423		$	934,316		$	65,162		$	36,652	$	1,652,553
Business Banking Credit Exposure
By Internally Assigned Grade:		Business Banking											Total
Non-classified		$	319,578										$	319,578
Classified			18,101											18,101
Total		$	337,679										$	337,679
Consumer Credit Exposure
By Payment Activity:		Indirect			Home Equity			Direct					Total
Performing		$	1,158,800		$	525,777		$	58,151				$	1,742,728
Nonperforming			3,044			7,046			132					10,222
Total		$	1,161,844		$	532,823		$	58,283				$	1,752,950
Residential Mortgage Credit Exposure		Residential
By Payment Activity:		Mortgage											Total
Performing		$	725,308										$	725,308
Nonperforming			7,913											7,913
Total		$	733,221										$	733,221
Credit Quality Indicators
As of December 31, 2013
ACQUIRED
Commercial Credit Exposure					Commercial
By Internally Assigned Grade:		Commercial			Real Estate			Agricultural			Total
Pass		$	85,692		$	205,010		$	-		$	290,702
Special Mention			2,230			6,183			-			8,413
Substandard			15,304			17,821			-			33,125
Doubtful			-			-			-			-
Total		$	103,226		$	229,014		$	-		$	332,240
Business Banking Credit Exposure
By Internally Assigned Grade:		Business Banking									Total
Non-classified		$	65,437								$	65,437
Classified			4,712									4,712
Total		$	70,149								$	70,149
Consumer Credit Exposure
By Payment Activity:		Indirect			Home Equity			Direct			Total
Performing		$	124,922		$	86,506		$	7,367		$	218,795
Nonperforming			164			570			58			792
Total		$	125,086		$	87,076		$	7,425		$	219,587
Residential Mortgage Credit Exposure		Residential
By Payment Activity:		Mortgage									Total
Performing		$	304,544								$	304,544
Nonperforming			3,872									3,872
Total		$	308,416								$	308,416
Troubled Debt Restructured Loans
The Company’s loan portfolio includes certain loans that have been modified where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties.  These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions.  Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months.  Substantially all of these modifications included one or a combination of the following: an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; temporary reduction in the interest rate; or change in scheduled payment amount.
When the Company modifies a loan, management evaluates any possible impairment based on the present value of the expected future cash flows, discounted at the contractual interest rate of the original loan agreement, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the collateral.  In these cases, management uses the current fair value of the collateral, less selling costs, instead of discounted cash flows.  If management determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized by segment or class of loan as applicable, through an allowance estimate or a charge-off to the allowance.  Segment and class status is determined by the loan’s classification at origination.
TDRs that occurred during the three month period ending March 31, 2014 consisted of 22 home equity loans and 12 residential real estate mortgages totaling $1.1 million and $1.0 million, respectively.  For all such modifications, the pre and post outstanding recorded investment amount remained unchanged. During the three month period ending March 31, 2014 there was one default on a home equity loan totaling $11,000 and one default on a residential real estate mortgage totaling $0.1 million.
TDRs that occurred during the three month period ending March 31, 2013 consisted of 10 home equity loans and one residential real estate mortgage totaling $0.6 million and $0.1 million, respectively.  For all such modifications, the pre and post outstanding recorded investment amount remained unchanged. During the three month period ending March 31, 2013 there were no defaults on previously modified loans.

Defined_Benefit_Postretirement

Defined Benefit Postretirement Plans	3 Months Ended
	Mar. 31, 2014
Defined Benefit Postretirement Plans [Abstract]	'
Defined Benefit Postretirement Plans	'
	Note 5.	Defined Benefit Postretirement Plans
	The Company has a qualified, noncontributory, defined benefit pension plan (“the Plan”) covering substantially all of its employees at March 31, 2014.  Benefits paid from the plan are based on age, years of service, compensation and social security benefits, and are determined in accordance with defined formulas. The Company’s policy is to fund the pension plan in accordance with Employee Retirement Income Security Act of 1974 (“ERISA”) standards. Assets of the plan are invested in publicly traded stocks and bonds.  The Company is not required to make contributions to the Plan in 2014, and did not do so during the three months ended March 31, 2014.
	The Company assumed a noncontributory, defined benefit pension plan in the Alliance acquisition.  This plan covers certain Alliance full-time employees who met eligibility requirements on October 6, 2006, at which time all benefits were frozen.  Under the plan, retirement benefits are primarily a function of both the years of service and the level of compensation.  Effective May 1, 2013, this plan was merged into the Plan.
	Market conditions can result in an unusually high degree of volatility and increase the risks and short term liquidity associated with certain investments held by the Plan which could impact the value of these investments.
	In addition to the Plan, the Company also provides supplemental employee retirement plans to certain current and former executives.  These supplemental employee retirement plans and the Plan are collectively referred to herein as “Pension Benefits.”
	Also, the Company provides certain health care benefits for retired employees.  Benefits are accrued over the employees’ active service period. Only employees that were employed by the Company on or before January 1, 2000 are eligible to receive postretirement health care benefits.  This health care benefits plan is contributory for participating retirees, requiring participants to absorb certain deductibles and coinsurance amounts with contributions adjusted annually to reflect cost sharing provisions and benefit limitations called for in the plan.  Eligibility is contingent upon the direct transition from active employment status to retirement without any break in employment from the Company.  Employees also must be participants in the Company’s medical plan prior to their retirement.  The Company funds the cost of postretirement health care as benefits are paid. The Company elected to recognize the transition obligation on a delayed basis over twenty years.  In addition, the Company assumed post-retirement medical life insurance benefits for certain Alliance employees, retirees and their spouses, if applicable, in the Alliance acquisition.  These postretirement benefits are referred to herein as “Other Benefits.”  The components of expense for Pension Benefits and Other Benefits are set forth below (in thousands):
			Pension Benefits						Other Benefits
			Three months ended March 31,						Three months ended March 31,
	Components of net periodic (benefit) cost:		2014			2013			2014			2013
	Service cost		$	587		$	604		$	4		$	6
	Interest cost			1,040			722			90			34
	Expected return on plan assets			(2,175	)		(1,825	)		-			-
	Net amortization			25			603			(6	)		223
	Total (benefit) cost		$	(523	)	$	104		$	88		$	263

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Note 6.	Earnings Per Share
	Basic earnings per share excludes dilution and is computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity (such as the Company’s dilutive stock options and restricted stock units).
	The following is a reconciliation of basic and diluted earnings per share for the periods presented in the consolidated statements of income.
	Three months ended March 31,		2014		2013
	(in thousands, except per share data)
	Basic EPS:
	Weighted average common shares outstanding			43,762		36,410
	Net income available to common shareholders			18,009		7,649
	Basic EPS		$	0.41	$	0.21
	Diluted EPS:
	Weighted average common shares outstanding			43,762		36,410
	Dilutive effect of common stock options and restricted stock			505		384
	Weighted average common shares and common share equivalents			44,267		36,794
	Net income available to common shareholders			18,009		7,649
	Diluted EPS		$	0.41	$	0.21
	There were 479,543 stock options for the quarter ended March 31, 2014 and 1,171,825 stock options for the quarter ended March 31, 2013 that were not considered in the calculation of diluted earnings per share since the stock options’ exercise price was greater than the average market price during these periods.

Reclassification_Adjustments_O

Reclassification Adjustments Out of Other Comprehensive (Loss) Income	3 Months Ended
	Mar. 31, 2014
Reclassification Adjustments Out of Other Comprehensive (Loss) income [Abstract]	'
Reclassification Adjustments Out of Other Comprehensive (Loss) Income	'
	Note 7.	Reclassification Adjustments Out of Other Comprehensive (Loss) Income
	The following table summarizes the reclassification adjustments out of accumulated other comprehensive loss (in thousands):
	Detail About Accumulated Other Comprehensive		Amount reclassified from accumulated other						Affected line item in the
	(Loss) Income Components		comprehensive income (loss)						consolidated statement of
									comprehensive income
			Three months ended
			31-Mar-14			31-Mar-13
	Available for sale securities:
	Gains on available for sale securities		$	(7	)	$	(1,145	)	Net securities gains
	Tax benefit			3			454		Income tax expense
	Net of tax		$	(4	)	$	(691	)
	Pension and other benefits:
	Amortization of net gains		$	74		$	882		Salaries and employee benefits
	Amortization of prior service costs			(55	)		(56	)	Salaries and employee benefits
	Tax benefit			8			323		Income tax expense
	Net of tax		$	11		$	503
	Total reclassifications during the period, net of tax		$	7		$	(188	)

Fair_Values_Measurements_and_F

Fair Values Measurements and Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2014
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]	'
Fair Value Measurements and Fair Value of Financial Instruments	'
	Note  8.	Fair Value Measurements and Fair Value of Financial Instruments
	U.S. GAAP states that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants.  Fair value measurements are not adjusted for transaction costs.  A fair value hierarchy exists within U.S. GAAP 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 are described below:
	Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2 -  Quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability;
	Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	The types of instruments valued based on quoted market prices in active markets include most U.S. government and agency securities, many other sovereign government obligations, liquid mortgage products, active listed equities and most money market securities. Such instruments are generally classified within level 1 or level 2 of the fair value hierarchy.  The Company does not adjust the quoted price for such instruments.
	The types of instruments valued based on quoted prices in markets that are not active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency include most investment-grade and high-yield corporate bonds, less liquid mortgage products, less liquid agency securities, less liquid listed equities, state, municipal and provincial obligations, and certain physical commodities. Such instruments are generally classified within level 2 of the fair value hierarchy.
	Level 3 is for positions that are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate will be used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Subsequent to inception, management only changes level 3 inputs and assumptions when corroborated by evidence such as transactions in similar instruments, completed or pending third-party transactions in the underlying investment or comparable entities, subsequent rounds of financing, recapitalizations and other transactions across the capital structure, offerings in the equity or debt markets, and changes in financial ratios or cash flows.
	For the three month period ending March 31, 2014, the Company has made no transfers of assets between Level 1 and Level 2, and has had no Level 3 activity.
	The following tables set forth the Company’s financial assets and liabilities measured on a recurring basis that were accounted for at fair value.  Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands):
	March 31, 2014:
			Quoted Prices in		Significant		Significant
			Active Markets for		Other		Unobservable		Balance
			Identical Assets		Observable Inputs		Inputs		as of
			(Level 1)		(Level 2)		(Level 3)		31-Mar-14
	Assets:
	Securities Available for Sale:
	U.S. Treasury		$	33,473	$	-	$	-	$	33,473
	Federal Agency			-		300,158		-		300,158
	State & municipal			-		112,695		-		112,695
	Mortgage-backed			-		378,158		-		378,158
	Collateralized mortgage obligations			-		537,647		-		537,647
	Other securities			7,238		8,216		-		15,454
	Total Securities Available for Sale		$	40,711	$	1,336,874	$	-	$	1,377,585
	Trading Securities			6,954		-		-		6,954
	Interest Rate Swaps			-		1,283		-		1,283
	Total		$	47,665	$	1,338,157	$	-	$	1,385,822
	Liabilities:
	Interest Rate Swaps		$	-	$	1,283	$	-	$	1,283
	Total		$	-	$	1,283	$	-	$	1,283
	December 31, 2013:
			Quoted Prices in		Significant		Significant
			Active Markets for		Other		Unobservable		Balance
			Identical Assets		Observable Inputs		Inputs		as of
			(Level 1)		(Level 2)		(Level 3)		31-Dec-13
	Assets:
	Securities Available for Sale:
	U.S. Treasury		$	43,616	$	-	$	-	$	43,616
	Federal Agency			-		278,915		-		278,915
	State & municipal			-		113,665		-		113,665
	Mortgage-backed			-		364,164		-		364,164
	Collateralized mortgage obligations			-		549,528		-		549,528
	Other securities			6,796		8,197		-		14,993
	Total Securities Available for Sale		$	50,412	$	1,314,469	$	-	$	1,364,881
	Trading Securities			5,779		-		-		5,779
	Interest Rate Swaps			-		281		-		281
	Total		$	56,191	$	1,314,750	$	-	$	1,370,941
	Liabilities:
	Interest Rate Swaps		$	-	$	281	$	-	$	281
	Total		$	-	$	281	$	-	$	281
	Certain common equity securities are reported at fair value utilizing Level 1 inputs (exchange quoted prices).  The majority of the other investment securities are reported at fair value utilizing Level 2 inputs.  The prices for these instruments are obtained through an independent pricing service or dealer market participants with whom the Company has historically transacted both purchases and sales of investment securities.  Prices obtained from these sources include prices derived from market quotations and matrix pricing.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things.  Management reviews the methodologies used in pricing the securities by its third party providers.
	U.S. GAAP requires disclosure of assets and liabilities measured and recorded at fair value on a nonrecurring basis such as goodwill, loans held for sale, other real estate owned, collateral-dependent impaired loans, mortgage servicing rights, and held-to-maturity securities.  The only nonrecurring fair value measurement recorded during the three month period ended March 31, 2014 and December 31, 2013 was related to impaired loans.  The Company had collateral dependent impaired loans with a carrying value of approximately $4.0 million which had specific reserves included in the allowance for loan losses of $0.9 million at March 31, 2014.  The Company had collateral dependent impaired loans with a carrying value of approximately $5.0 million which had specific reserves included in the allowance for loan losses of $0.7 million at December 31, 2013.  The Company uses the fair value of underlying collateral, less costs to sell, to estimate the specific reserves for collateral dependent impaired loans.  The appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses ranging from 10% to 35%.  Based on the valuation techniques used, the fair value measurements for collateral dependent impaired loans are classified as Level 3.
	The following table sets forth information with regard to estimated fair values of financial instruments at March 31, 2014 and December 31, 2013.  This table excludes financial instruments for which the carrying amount approximates fair value.  Financial instruments for which the fair value approximates carrying value include cash and cash equivalents, securities available for sale, trading securities, accrued interest receivable, non-maturity deposits, short-term borrowings, accrued interest payable, and interest rate swaps.
					31-Mar-14				31-Dec-13
	(In thousands)		Fair		Carrying		Estimated		Carrying		Estimated
			Value		amount		fair value		amount		fair value
			Hierarchy
	Financial assets
	Securities held to maturity			2	$	117,896	$	114,920	$	117,283	$	113,276
	Net loans			3		5,412,591		5,460,326		5,337,361		5,386,520
	Financial liabilities
	Time deposits			2	$	969,361	$	969,980	$	1,021,142	$	1,023,982
Long-term debt			2		308,679		323,712		308,823		325,195
Junior subordinated debt			2		101,196		105,864		101,196		105,121
Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.
Fair value estimates are based on existing on and off balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. For example, the Company has a substantial trust and investment management operation that contributes net fee income annually. The trust and investment management operation is not considered a financial instrument, and its value has not been incorporated into the fair value estimates. Other significant assets and liabilities include the benefits resulting from the low-cost funding of deposit liabilities as compared to the cost of borrowing funds in the market, and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimate of fair value.
Securities Held to Maturity
The fair value of the Company’s investment securities held to maturity is primarily measured using information from a third party pricing service.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things.
Net Loans
The fair value of the Company’s loans was estimated by discounting the expected future cash flows using the current interest rates at which similar loans would be made for the same remaining maturities.  Loans were first segregated by type, and then further segmented into fixed and variable rate and loan quality categories.  Expected future cash flows were projected based on contractual cash flows, adjusted for estimated prepayments.
Time Deposits
The fair value of time deposits was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.  The fair values of the Company’s time deposit liabilities do not take into consideration the value of the Company’s long-term relationships with depositors, which may have significant value.
Long-Term Debt
The fair value of long-term debt was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.
Trust Preferred Debentures
The fair value of trust preferred debentures has been estimated using a discounted cash flow analysis.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	Note 9.	Commitments and Contingencies
	The Company is a party to financial instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuating interest rates. These financial instruments include commitments to extend credit, unused lines of credit, and standby letters of credit. Exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to make loans and standby letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit origination guidelines, portfolio maintenance and management procedures as other credit and off-balance sheet products.  Commitments to extend credit and unused lines of credit totaled $1.1 billion at March 31, 2014 and December 31, 2013.  Since commitments to extend credit and unused lines of credit may expire without being fully drawn upon, this amount does not necessarily represent future cash commitments. Collateral obtained upon exercise of the commitment is determined using management’s credit evaluation of the borrower and may include accounts receivable, inventory, property, land and other items.
	The Company guarantees the obligations or performance of customers by issuing standby letters of credit to third parties. These standby letters of credit are frequently issued in support of third party debt, such as corporate debt issuances, industrial revenue bonds and municipal securities. The credit risk involved in issuing standby letters of credit is essentially the same as the credit risk involved in extending loan facilities to customers, and they are subject to the same credit origination guidelines, portfolio maintenance and management procedures as other credit and off-balance sheet products. Typically, these instruments have terms of five years or less and expire unused; therefore, the total amounts do not necessarily represent future cash commitments. Standby letters of credit totaled $38.3 million at March 31, 2014 and $36.8 million at December 31, 2013.  As of March 31, 2014, the fair value of standby letters of credit was not significant to the Company’s consolidated financial statements.
	The Company has also entered into commercial letter of credit agreements on behalf of its customers.  Under these agreements, the Company, on the request of its customer, opens the letter of credit and makes a commitment to honor draws made under the agreement, whereby the beneficiary is normally the provider of goods and/or services and the Company essentially replaces the customer as the payee.  The credit risk involved in issuing commercial letters of credit is essentially the same as the credit risk involved in extending loan facilities to customers, and they are subject to the same credit origination guidelines, portfolio maintenance and management procedures as other credit and off-balance sheet products.  Typically, these agreements vary in terms and the total amounts do not necessarily represent future cash commitments.  Commercial letters of credit totaled $41.0 million at March 31, 2014 and $41.3 million at December 31, 2013.  As of March 31, 2014, the fair value of commercial letters of credit was not significant to the Company’s consolidated financial statements.

Subsequent_Event

Subsequent Event	3 Months Ended
	Mar. 31, 2014
Subsequent Event [Abstract]	'
Subsequent Event	'
	Note 10.	Subsequent Event
	On April 17, 2014, NBT Capital Corp., a wholly-owned subsidiary of NBT, sold to LendingClub Corporation, its 20% ownership interest in Springstone Financial, LLC, which NBT originally acquired in exchange for a $3 million investment, as part of LendingClub’s acquisition of all of the outstanding equity in Springstone.  In total, LendingClub paid the group of selling equityholders a purchase price equal to $140 million in cash and preferred stock.  Springstone provides affordable financing options for consumers seeking to finance private education and elective medical procedures through a network of over 14,000 schools and healthcare providers.  In connection with the acquisition, NBT Bank and Springstone entered into an amended and restated program agreement pursuant to which NBT Bank will continue to participate in lending activities with respect to Springstone’s financing operations.  NBT is exploring balance sheet strategies for optimal use of the proceeds from this transaction.

Description_of_Business_Polici

Description of Business (Policies)	3 Months Ended
	Mar. 31, 2014
Description of Business [Abstract]	'
Nature of Operations	'
	Description of Business
	NBT Bancorp Inc. (the “Registrant” or the “Company”) is a registered financial holding company incorporated in the state of Delaware in 1986, with its principal headquarters located in Norwich, New York.  The principal assets of the Registrant consist of all of the outstanding shares of common stock of its subsidiaries, including:  NBT Bank, National Association (the “Bank”), NBT Financial Services, Inc. (“NBT Financial”), NBT Holdings, Inc. (“NBT Holdings”), Hathaway Agency, Inc., and CNBF Capital Trust I, NBT Statutory Trust I and NBT Statutory Trust II (collectively, the “Trusts”).  The Company’s principal sources of revenue are the management fees and dividends it receives from the Bank, NBT Financial and NBT Holdings.
	The Company’s business, primarily conducted through the Bank but also through its other subsidiaries, consists of providing commercial banking and financial services to customers in its market area, which includes central and upstate New York, northeastern Pennsylvania, southern New Hampshire, western Massachusetts and the greater Burlington, Vermont area.  The Company has been, and intends to continue to be, a community-oriented financial institution offering a variety of financial services.  The Company’s business philosophy is to operate as a community bank with local decision-making, principally in non-metropolitan markets, providing a broad array of banking and financial services to retail, commercial, and municipal customers.

Securities_Policies

Securities (Policies)	3 Months Ended
	Mar. 31, 2014
Securities [Abstract]	'
Investment, Policy	'
	Declines in the fair value of held-to-maturity and available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses or in other comprehensive income, depending on whether the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss.  If the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss, the other-than-temporary impairment shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis and its fair value at the balance sheet date.  If the Company does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss, the other-than-temporary impairment shall be separated into (a) the amount representing the credit loss and (b) the amount related to all other factors.  The amount of the total other-than-temporary impairment related to the credit loss shall be recognized in earnings. The amount of the total other-than-temporary impairment related to other factors shall be recognized in other comprehensive income, net of applicable taxes.
	In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the historical and implied volatility of the fair value of the security.
	Management has the intent to hold the securities classified as held to maturity until they mature, at which time it is believed the Company will receive full value for the securities. Furthermore, as of March 31, 2014, management also had the intent to hold, and will not be required to sell, the securities classified as available for sale for a period of time sufficient for a recovery of cost, which may be until maturity.  The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying securities were purchased. When necessary, the Company has performed a discounted cash flow analysis to determine whether or not it will receive the contractual principal and interest on certain securities.  The fair value is expected to recover as the bonds approach their maturity date or repricing date or if market yields for such investments decline.  As of March 31, 2014, management believes the impairments detailed in the table above are temporary and no other-than-temporary impairment losses have been realized in the Company’s consolidated statements of income.

Allowance_for_Loan_Losses_and_1

Allowance for Loan Losses and Credit Quality of Loans (Policies)	3 Months Ended
	Mar. 31, 2014
Allowance for Loan Losses and Credit Quality of Loans [Abstract]	'
Loans and Leases Receivable, Allowance for Loan Losses Policy	'
	Allowance for Loan Losses
	The allowance for loan losses is maintained at a level estimated by management to provide adequately for risk of probable losses inherent in the current loan portfolio. The adequacy of the allowance for loan losses is continuously monitored.  It is assessed for adequacy using a methodology designed to ensure the level of the allowance reasonably reflects the loan portfolio’s risk profile. It is evaluated to ensure that it is sufficient to absorb all reasonably estimable credit losses inherent in the current loan portfolio.
	To develop and document a systematic methodology for determining the allowance for loan losses, the Company has divided the loan portfolio into three segments, each with different risk characteristics and methodologies for assessing risk.  Those segments are further segregated between our loans accounted for under the amortized cost method (referred to as “originated” loans) and loans acquired in a business combination (referred to as “acquired” loans).  Each portfolio segment is broken down into class segments where appropriate.  Class segments contain unique measurement attributes, risk characteristics and methods for monitoring and assessing risk that are necessary to develop the allowance for loan losses.  Unique characteristics such as borrower type, loan type, collateral type, and risk characteristics define each class segment.  The following table illustrates the portfolio and class segments for the Company’s loan portfolio:
	Portfolio		Class
	Commercial Loans		Commercial
			Commercial Real Estate
			Agricultural
			Agricultural Real Estate
			Business Banking
	Consumer Loans		Indirect
			Home Equity
			Direct
	Residential Real Estate Mortgages
	Commercial Loans
	The Company offers a variety of commercial loan products including commercial (non-real estate), commercial real estate, agricultural, agricultural real estate, and business banking loans.  The Company’s underwriting analysis for commercial loans typically includes credit verification, independent appraisals, a review of the borrower’s financial condition, and a detailed analysis of the borrower’s underlying cash flows.
	Commercial – The Company offers a variety of loan options to meet the specific needs of our commercial customers including term loans, time notes and lines of credit.  Such loans are made available to businesses for working capital needs such as inventory and receivables, business expansion and equipment purchases. Generally, a collateral lien is placed on equipment or other assets owned by the borrower.  These loans carry a higher risk than commercial real estate loans due to the nature of the underlying collateral, which can be business assets such as equipment and accounts receivable. To reduce the risk, management also attempts to secure real estate as collateral and obtain personal guarantees of the borrowers.
	Commercial Real Estate – The Company offers commercial real estate loans to finance real estate purchases, refinancings, expansions and improvements to commercial properties.  Commercial real estate loans are made to finance the purchases of real estate, generally with completed structures. These commercial real estate loans are secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities, and other non owner-occupied facilities.  These loans are typically less risky than commercial loans, since they are secured by real estate and buildings, and are generally originated in amounts of no more than 80% of the appraised value of the property.
	Agricultural – The Company offers a variety of agricultural loans to meet the needs of our agricultural customers including term loans, time notes, and lines of credit.  These loans are made to purchase livestock, purchase and modernize equipment, and finance seasonal crop expenses.  Generally, a collateral lien is placed on the livestock, equipment, produce inventories, and/or receivables owned by the borrower.  These loans may carry a higher risk than commercial and agricultural real estate loans due to the industry price volatility, and in some cases, the perishable nature of the underlying collateral.  To reduce these risks, management may attempt to secure these loans with additional real estate collateral, obtain personal guarantees of the borrowers, or obtain government loan guarantees to provide further support.
	Agricultural Real Estate – The Company offers real estate loans to our agricultural customers to finance farm related real estate purchases, refinancings, expansions, and improvements to agricultural properties such as barns, production facilities, and land.  The agricultural real estate loans are secured by first liens on the farm real estate.  Because they are secured by land and buildings, these loans may be less risky than agricultural loans.  These loans are typically originated in amounts of no more than 75% of the appraised value of the property.  Government loan guarantees may be obtained to provide further support.
	Business Banking - The Company offers a variety of loan options to meet the specific needs of our business banking customers including term loans, business banking mortgages and lines of credit.  Such loans are generally less than $0.5 million and are made available to businesses for working capital such as inventory and receivables, business expansion, equipment purchases, and agricultural needs.  Generally, a collateral lien is placed on equipment or other assets owned by the borrower such as inventory and/or receivables.  These loans carry a higher risk than commercial loans due to the smaller size of the borrower and lower levels of capital.  To reduce the risk, the Company obtains personal guarantees of the owners for a majority of the loans.
	Consumer Loans
	The Company offers a variety of consumer loan products including indirect, home equity, and direct loans.
	Indirect – The Company maintains relationships with many dealers primarily in the communities that we serve.  Through these relationships, the company primarily finances the purchases of automobiles and recreational vehicles (such as campers, boats, etc.) indirectly through dealer relationships.  Approximately 75% of the indirect relationships represent automobile financing.  Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from three to six years, based upon the nature of the collateral and the size of the loan. The majority of indirect consumer loans are underwritten on a secured basis using the underlying collateral being financed.
	Home Equity – The Company offers fixed home equity loans as well as home equity lines of credit to consumers to finance home improvements, debt consolidation, education and other uses.  Consumers are able to borrow up to 85% of the equity in their homes.  The Company originates home equity lines of credit and second mortgage loans (loans secured by a second junior lien position on one-to-four-family residential real estate).  These loans carry a higher risk than first mortgage residential loans as they are in a second position with respect to collateral.  Risk is reduced through underwriting criteria, which include credit verification, appraisals, a review of the borrower's financial condition, and personal cash flows.  A security interest, with title insurance when necessary, is taken in the underlying real estate.
	Direct – The Company offers a variety of consumer installment loans to finance vehicle purchases, mobile home purchases and personal expenditures.  Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from one to ten years, based upon the nature of the collateral and the size of the loan. The majority of consumer loans are underwritten on a secured basis using the underlying collateral being financed or a customer's deposit account. In addition to installment loans, the Company also offers personal lines of credit and overdraft protection.  A minimal amount of loans are unsecured, which carry a higher risk of loss.
	Residential Real Estate Mortgages
	Residential real estate loans consist primarily of loans secured by first or second deeds of trust on primary residences.  We originate adjustable-rate and fixed-rate, one-to-four-family residential real estate loans for the construction, purchase or refinancing of a mortgage.  These loans are collateralized by owner-occupied properties located in the Company’s market area.  Loans on one-to-four-family residential real estate are generally originated in amounts of no more than 85% of the purchase price or appraised value (whichever is lower), or have private mortgage insurance.  The Company’s underwriting analysis for residential mortgage loans typically includes credit verification, independent appraisals, and a review of the borrower’s financial condition.  Mortgage title insurance and hazard insurance are normally required. Construction loans have a unique risk, because they are secured by an incomplete dwelling. This risk is reduced through periodic site inspections, including one at each loan draw period.
	For purposes of evaluating the adequacy of the allowance, the Company considers a number of significant factors that affect the collectability of the portfolio.  For individually analyzed loans, these include estimates of loss exposure, which reflect the facts and circumstances that affect the likelihood of repayment of such loans as of the evaluation date. For homogeneous pools of loans, estimates of the Company’s exposure to credit loss reflect a current assessment of a number of factors, which could affect collectability.  These factors include:  past loss experience;  size, trend, composition, and nature of loans;  changes in lending policies and procedures, including underwriting standards and collection,  charge-offs  and  recoveries; trends experienced in nonperforming and delinquent loans; current economic conditions in the Company’s market;  portfolio concentrations that may affect loss experienced across one or more components of the portfolio; the effect of external factors such as competition, legal and regulatory requirements; and the experience, ability, and depth of lending management and staff. In addition, various regulatory agencies, as an integral component of their examination process, periodically review the Company’s allowance for loan losses.  Such agencies may require the Company to make loan grade changes as well as recognize additions to the allowance based on their examinations.
	After a thorough consideration of the factors discussed above, any required additions or reductions to the allowance for loan losses are made periodically by charges or credits to the provision for loan losses. These charges or credits are necessary to maintain the allowance at a level which management believes is reasonably reflective of overall inherent risk of probable loss in the portfolio. While management uses available information to recognize losses on loans, additions and reductions of the allowance may fluctuate from one reporting period to another.  These fluctuations are reflective of changes in risk associated with portfolio content and/or changes in management’s assessment of any or all of the determining factors discussed above.
	For acquired loans, to the extent that we experience deterioration in borrower credit quality resulting in a decrease in our expected cash flows subsequent to acquisition of the loans, an allowance for loan losses would be established based on our estimate of future credit losses over the remaining life of the loans.  As of March 31, 2014 and 2013, there was no allowance for loan losses for the acquired loan portfolio. Net charge-offs related to acquired loans totaled approximately $0.2 million during the three months ended March 31, 2014 and 2013, and are included in the table above.
	Credit Quality of Loans
	Loans are placed on nonaccrual status when timely collection of principal and interest in accordance with contractual terms is doubtful. Loans are transferred to nonaccrual status generally when principal or interest payments become ninety days delinquent, unless the loan is well secured and in the process of collection, or sooner when management concludes or circumstances indicate that borrowers may be unable to meet contractual principal or interest payments.  When a loan is transferred to a nonaccrual status, all interest previously accrued in the current period but not collected is reversed against interest income in that period. Interest accrued in a prior period and not collected is charged-off against the allowance for loan losses.  The Company’s nonaccrual policies are the same for all classes of financing receivable.
	If ultimate repayment of a nonaccrual loan is expected, any payments received are applied in accordance with contractual terms. If ultimate repayment of principal is not expected, any payment received on a nonaccrual loan is applied to principal until ultimate repayment becomes expected.  Nonaccrual loans are returned to accrual status when they become current as to principal and interest and demonstrate a period of performance under the contractual terms and, in the opinion of management, are fully collectible as to principal and interest.  When in the opinion of management the collection of principal appears unlikely, the loan balance is charged-off in total or in part.  For loans in all portfolios, the principal amount is charged off in full or in part as soon as management determines, based on available facts, that the collection of principal in full is improbable.  For commercial loans, management considers specific facts and circumstances relative to individual credits in making such a determination.  For consumer and residential loan classes, management uses specific guidance and thresholds from the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy.
	Impaired Loans
	The methodology used to establish the allowance for loan losses on impaired loans incorporates specific allocations on loans analyzed individually.  Classified and nonperforming loans and troubled debt restructured loans (“TDR”) with outstanding balances of $0.5 million or more are evaluated for impairment through the Company’s quarterly status review process.  In determining that we will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreements, we consider factors such as payment history and changes in the financial condition of individual borrowers, local economic conditions, historical loss experience and the conditions of the various markets in which the collateral may be liquidated.  For loans that are impaired as defined by accounting standards, impairment is measured by one of three methods: 1) the fair value of collateral less cost to sell, 2) present value of expected future cash flows or 3) the loan’s observable market price.  All impaired loans are reviewed on a quarterly basis for changes in the measurement of impairment.  Any change to the previously recognized impairment loss is recognized as a change to the allowance account and recorded in the consolidated statement of income as a component of the provision for credit losses.
Credit Quality Indicators	'
	Credit Quality Indicators
	The Company has developed an internal loan grading system to evaluate and quantify the Company’s loan portfolio with respect to quality and risk.  The system focuses on, among other things, financial strength of borrowers, experience and depth of borrower’s management, primary and secondary sources of repayment, payment history, nature of the business, and outlook on particular industries.  The internal grading system enables the Company to monitor the quality of the entire loan portfolio on a consistent basis and provide management with an early warning system, enabling recognition and response to problem loans and potential problem loans.
	Commercial Grading System
	For commercial and agricultural loans, the Company uses a grading system that relies on quantifiable and measurable characteristics when available.  This would include comparison of financial strength to available industry averages, comparison of transaction factors (loan terms and conditions) to loan policy, and comparison of credit history to stated repayment terms and industry averages. Some grading factors are necessarily more subjective such as economic and industry factors, regulatory environment, and management.  Classified commercial loans consist of loans graded substandard and below.  The grading system for commercial and agricultural loans is as follows:
		·	Doubtful
	A doubtful loan has a high probability of total or substantial loss, but because of specific pending events that may strengthen the asset, its classification as a loss is deferred. Doubtful borrowers are usually in default, lack adequate liquidity or capital, and lack the resources necessary to remain an operating entity. Pending events can include mergers, acquisitions, liquidations, capital injections, the perfection of liens on additional collateral, the valuation of collateral, and refinancing. Generally, pending events should be resolved within a relatively short period and the ratings will be adjusted based on the new information. Nonaccrual treatment is required for doubtful assets because of the high probability of loss.
		·	Substandard
	Substandard loans have a high probability of payment default, or they have other well-defined weaknesses. They require more intensive supervision by bank management. Substandard loans are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization. Repayment may depend on collateral or other credit risk mitigants. For some Substandard loans, the likelihood of full collection of interest and principal may be in doubt and those loans should be placed on nonaccrual. Although Substandard assets in the aggregate will have a distinct potential for loss, an individual asset’s loss potential does not have to be distinct for the asset to be rated Substandard.
		·	Special Mention
	Special Mention loans have potential weaknesses that may, if not checked or corrected, weaken the asset or inadequately protect the Company’s position at some future date. These loans pose elevated risk, but their weakness does not yet justify a Substandard classification. Borrowers may be experiencing adverse operating trends (declining revenues or margins) or may be struggling with an ill-proportioned balance sheet (e.g., increasing inventory without an increase in sales, high leverage, tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a Special Mention rating. Although a Special Mention loan has a higher probability of default than a pass asset, its default is not imminent.
		·	Pass
	Loans graded as Pass encompass all loans not graded as Doubtful, Substandard, or Special Mention.  Pass loans are in compliance with loan covenants, and payments are generally made as agreed.  Pass loans range from superior quality to fair quality.
	Business Banking Grading System
	Business banking loans are graded as either Classified or Non-classified:
		·	Classified
	Classified loans are inadequately protected by the current worth and paying capacity of the obligor or, if applicable, the collateral pledged.   These loans have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt, or in some cases make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected.   Classified loans have a high probability of payment default, or a high probability of total or substantial loss.  These loans require more intensive supervision by management and are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization.  Repayment may depend on collateral or other credit risk mitigants.  When the likelihood of full collection of interest and principal may be in doubt; classified loans are considered to have a nonaccrual status.   In some cases, Classified loans are considered uncollectible and of such little value that their continuance as assets is not warranted.
		·	Non-classified
	Loans graded as Non-classified encompass all loans not graded as Classified.  Non-classified loans are in compliance with loan covenants, and payments are generally made as agreed.
	Consumer and Residential Mortgage Grading System
	Consumer and Residential Mortgage loans are graded as either Performing or Nonperforming.   Nonperforming loans are loans that are 1) over 90 days past due and interest is still accruing, 2) on nonaccrual status or 3) restructured.  All loans not meeting any of these three criteria are considered Performing.
Loans and Leases Receivable, Troubled Debt Restructuring Policy	'
	Troubled Debt Restructured Loans
	The Company’s loan portfolio includes certain loans that have been modified where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties.  These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions.  Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months.  Substantially all of these modifications included one or a combination of the following: an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; temporary reduction in the interest rate; or change in scheduled payment amount.
	When the Company modifies a loan, management evaluates any possible impairment based on the present value of the expected future cash flows, discounted at the contractual interest rate of the original loan agreement, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the collateral.  In these cases, management uses the current fair value of the collateral, less selling costs, instead of discounted cash flows.  If management determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized by segment or class of loan as applicable, through an allowance estimate or a charge-off to the allowance.  Segment and class status is determined by the loan’s classification at origination.

Defined_Benefit_Postretirement1

Defined Benefit Postretirement Plans (Policies)	3 Months Ended
	Mar. 31, 2014
Defined Benefit Postretirement Plans [Abstract]	'
Postemployment Benefit Plans, Policy	'
	The Company has a qualified, noncontributory, defined benefit pension plan (“the Plan”) covering substantially all of its employees at March 31, 2014.  Benefits paid from the plan are based on age, years of service, compensation and social security benefits, and are determined in accordance with defined formulas. The Company’s policy is to fund the pension plan in accordance with Employee Retirement Income Security Act of 1974 (“ERISA”) standards. Assets of the plan are invested in publicly traded stocks and bonds.  The Company is not required to make contributions to the Plan in 2014, and did not do so during the three months ended March 31, 2014.
	The Company assumed a noncontributory, defined benefit pension plan in the Alliance acquisition.  This plan covers certain Alliance full-time employees who met eligibility requirements on October 6, 2006, at which time all benefits were frozen.  Under the plan, retirement benefits are primarily a function of both the years of service and the level of compensation.  Effective May 1, 2013, this plan was merged into the Plan.
	Market conditions can result in an unusually high degree of volatility and increase the risks and short term liquidity associated with certain investments held by the Plan which could impact the value of these investments.
	In addition to the Plan, the Company also provides supplemental employee retirement plans to certain current and former executives.  These supplemental employee retirement plans and the Plan are collectively referred to herein as “Pension Benefits.”
	Also, the Company provides certain health care benefits for retired employees.  Benefits are accrued over the employees’ active service period. Only employees that were employed by the Company on or before January 1, 2000 are eligible to receive postretirement health care benefits.  This health care benefits plan is contributory for participating retirees, requiring participants to absorb certain deductibles and coinsurance amounts with contributions adjusted annually to reflect cost sharing provisions and benefit limitations called for in the plan.  Eligibility is contingent upon the direct transition from active employment status to retirement without any break in employment from the Company.  Employees also must be participants in the Company’s medical plan prior to their retirement.  The Company funds the cost of postretirement health care as benefits are paid. The Company elected to recognize the transition obligation on a delayed basis over twenty years.  In addition, the Company assumed post-retirement medical life insurance benefits for certain Alliance employees, retirees and their spouses, if applicable, in the Alliance acquisition.  These postretirement benefits are referred to herein as “Other Benefits.”  The components of expense for Pension Benefits and Other Benefits are set forth below (in thousands):

Fair_Values_Measurements_and_F1

Fair Values Measurements and Fair Value of Financial Instruments (Policies)	3 Months Ended
	Mar. 31, 2014
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]	'
Fair Value of Financial Instruments, Policy	'
	U.S. GAAP states that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants.  Fair value measurements are not adjusted for transaction costs.  A fair value hierarchy exists within U.S. GAAP 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 are described below:
	Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2 -  Quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability;
	Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	The types of instruments valued based on quoted market prices in active markets include most U.S. government and agency securities, many other sovereign government obligations, liquid mortgage products, active listed equities and most money market securities. Such instruments are generally classified within level 1 or level 2 of the fair value hierarchy.  The Company does not adjust the quoted price for such instruments.
	The types of instruments valued based on quoted prices in markets that are not active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency include most investment-grade and high-yield corporate bonds, less liquid mortgage products, less liquid agency securities, less liquid listed equities, state, municipal and provincial obligations, and certain physical commodities. Such instruments are generally classified within level 2 of the fair value hierarchy.
	Level 3 is for positions that are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate will be used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Subsequent to inception, management only changes level 3 inputs and assumptions when corroborated by evidence such as transactions in similar instruments, completed or pending third-party transactions in the underlying investment or comparable entities, subsequent rounds of financing, recapitalizations and other transactions across the capital structure, offerings in the equity or debt markets, and changes in financial ratios or cash flows.
	Certain common equity securities are reported at fair value utilizing Level 1 inputs (exchange quoted prices).  The majority of the other investment securities are reported at fair value utilizing Level 2 inputs.  The prices for these instruments are obtained through an independent pricing service or dealer market participants with whom the Company has historically transacted both purchases and sales of investment securities.  Prices obtained from these sources include prices derived from market quotations and matrix pricing.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things.  Management reviews the methodologies used in pricing the securities by its third party providers.
	U.S. GAAP requires disclosure of assets and liabilities measured and recorded at fair value on a nonrecurring basis such as goodwill, loans held for sale, other real estate owned, collateral-dependent impaired loans, mortgage servicing rights, and held-to-maturity securities.  The only nonrecurring fair value measurement recorded during the three month period ended March 31, 2014 and December 31, 2013 was related to impaired loans.  The Company had collateral dependent impaired loans with a carrying value of approximately $4.0 million which had specific reserves included in the allowance for loan losses of $0.9 million at March 31, 2014.  The Company had collateral dependent impaired loans with a carrying value of approximately $5.0 million which had specific reserves included in the allowance for loan losses of $0.7 million at December 31, 2013.  The Company uses the fair value of underlying collateral, less costs to sell, to estimate the specific reserves for collateral dependent impaired loans.  The appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses ranging from 10% to 35%.  Based on the valuation techniques used, the fair value measurements for collateral dependent impaired loans are classified as Level 3.
	Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.
	Fair value estimates are based on existing on and off balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. For example, the Company has a substantial trust and investment management operation that contributes net fee income annually. The trust and investment management operation is not considered a financial instrument, and its value has not been incorporated into the fair value estimates. Other significant assets and liabilities include the benefits resulting from the low-cost funding of deposit liabilities as compared to the cost of borrowing funds in the market, and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimate of fair value.
	Securities Held to Maturity
	The fair value of the Company’s investment securities held to maturity is primarily measured using information from a third party pricing service.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things.
	Net Loans
	The fair value of the Company’s loans was estimated by discounting the expected future cash flows using the current interest rates at which similar loans would be made for the same remaining maturities.  Loans were first segregated by type, and then further segmented into fixed and variable rate and loan quality categories.  Expected future cash flows were projected based on contractual cash flows, adjusted for estimated prepayments.
	Time Deposits
	The fair value of time deposits was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.  The fair values of the Company’s time deposit liabilities do not take into consideration the value of the Company’s long-term relationships with depositors, which may have significant value.
	Long-Term Debt
	The fair value of long-term debt was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.
	Trust Preferred Debentures
	The fair value of trust preferred debentures has been estimated using a discounted cash flow analysis.

Securities_Tables

Securities (Tables)	3 Months Ended
	Mar. 31, 2014
Securities [Abstract]	'
Amortized cost, estimated fair value, and unrealized gains and losses of securities available for sale	'
	The amortized cost, estimated fair value, and unrealized gains and losses of securities available for sale are as follows:
	(In thousands)	Amortized		Unrealized			Unrealized		Estimated
		cost		gains			losses		fair value
	31-Mar-14
	U.S. Treasury	$	33,204	$	269		$	-	$	33,473
	Federal Agency		305,245		430			5,517		300,158
	State & municipal		111,583		1,967			855		112,695
	Mortgage-backed:
	Government-sponsored enterprises		351,748		6,164			1,404		356,508
	U.S. government agency securities		20,781		940			71		21,650
	Collateralized mortgage obligations:
	Government-sponsored enterprises		501,563		2,080			13,411		490,232
	U.S. government agency securities		46,876		656			117		47,415
	Other securities		12,839		2,851			236		15,454
	Total securities available for sale	$	1,383,839	$	15,357		$	21,611	$	1,377,585
	31-Dec-13
	U.S. Treasury	$	43,279	$	337		$	-	$	43,616
	Federal Agency		285,880		343			7,308		278,915
	State & municipal		113,435		1,842			1,612		113,665
	Mortgage-backed:
	Government-sponsored enterprises		337,666		5,788			2,131		341,323
	U.S. government agency securities		21,924		1,002			85		22,841
	Collateralized mortgage obligations:
	Government-sponsored enterprises		521,257		1,777			18,141		504,893
	U.S. government agency securities		43,943		794			102		44,635
	Other securities		12,367		2,854			228		14,993
	Total securities available for sale	$	1,379,751	$	14,737		$	29,607	$	1,364,881
Amortized cost, estimated fair value, and unrealized gains and losses of securities held to maturity	'
	The amortized cost, estimated fair value, and unrealized gains and losses of securities held to maturity are as follows:
		Amortized		Unrealized			Unrealized		Estimated
	(In thousands)	cost		gains			losses		fair value
	31-Mar-14
	Mortgage-backed	$	881	$	120		$	-	$	1,001
	Collateralized mortgage obligations		60,973		-			3,444		57,529
	State & municipal		56,042		361			13		56,390
	Total securities held to maturity	$	117,896	$	481		$	3,457	$	114,920
	31-Dec-13
	Mortgage-backed	$	953	$	128		$	-	$	1,081
	Collateralized mortgage obligations		62,025		-			4,569		57,456
	State & municipal		54,305		442			8		54,739
	Total securities held to maturity	$	117,283	$	570		$	4,577	$	113,276
Investment securities with unrealized losses	'
	The following table sets forth information with regard to investment securities with unrealized losses at March 31, 2014 and December 31, 2013:
		Less than 12 months							12 months or longer							Total
	Security Type:	Fair Value		Unrealized			Number		Fair Value		Unrealized			Number		Fair Value		Unrealized			Number
				losses			of				losses			of				losses			of
							Positions							Positions							Positions
	31-Mar-14
	Investment securities available for sale:
	Federal agency	$	245,397	$	(5,221	)		21	$	9,704	$	(296	)		1	$	255,101	$	(5,517	)		22
	State & municipal		48,377		(839	)		171		934		(16	)		3		49,311		(855	)		174
	Mortgage-backed		1,110,605		(1,465	)		58		960		(10	)		4		1,111,565		(1,475	)		62
	Collateralized mortgage obligations		295,408		(10,516	)		31		60,681		(3,012	)		4		356,089		(13,528	)		35
	Other securities		5,507		(186	)		2		198		(50	)		1		5,705		(236	)		3
	Total securities with unrealized losses	$	1,705,294	$	(18,227	)		283	$	72,477	$	(3,384	)		13	$	1,777,771	$	(21,611	)		296
	31-Mar-14
	Investment securities held to maturity:
	Collateralized mortgage obligations	$	57,528	$	(3,444	)		5	$	-	$	-			-	$	57,528	$	(3,444	)		5
	State & municipal		2,120		(13	)		3		-		-			-		2,120		(13	)		3
	Total securities with unrealized losses	$	59,648	$	(3,457	)		8	$	-	$	-			-	$	59,648	$	(3,457	)		8
	31-Dec-13
	Investment securities available for sale:
	Federal agency	$	233,935	$	(6,927	)		20	$	9,619	$	(381	)		1	$	243,554	$	(7,308	)		21
	State & municipal		50,328		(1,612	)		177		-		-			-		50,328		(1,612	)		177
	Mortgage-backed		143,080		(2,216	)		79		-		-			-		143,080		(2,216	)		79
	Collateralized mortgage obligations		379,273		(18,243	)		36		-		-			-		379,273		(18,243	)		36
	Other securities		5,490		(203	)		2		223		(25	)		1		5,713		(228	)		3
	Total securities with unrealized losses	$	812,106	$	(29,201	)		314	$	9,842	$	(406	)		2	$	821,948	$	(29,607	)		316
	31-Dec-13
	Investment securities held to maturity:
	Collateralized mortgage obligations	$	57,456	$	(4,569	)		5	$	-	$	-			-	$	57,456	$	(4,569	)		5
	State & municipal		1,012		(8	)		1		-		-			-		1,012		(8	)		1
	Total securities with unrealized losses	$	58,468	$	(4,577	)		6	$	-	$	-			-	$	58,468	$	(4,577	)		6
Contractual maturities of debt securities	'
	The following tables set forth information with regard to contractual maturities of debt securities at March 31, 2014:
	(In thousands)	Amortized		Estimated fair
		cost		value
	Debt securities classified as available for sale
	Within one year	$	27,461	$	27,627
	From one to five years		302,113		301,603
	From five to ten years		259,225		259,821
	After ten years		782,201		773,080
		$	1,371,000	$	1,362,131
	Debt securities classified as held to maturity
	Within one year	$	24,714	$	24,765
	From one to five years		21,654		21,957
	From five to ten years		8,401		8,395
	After ten years		63,127		59,803
		$	117,896	$	114,920

Allowance_for_Loan_Losses_and_2

Allowance for Loan Losses and Credit Quality of Loans (Tables)	3 Months Ended
	Mar. 31, 2014
Allowance for Loan Losses and Credit Quality of Loans [Abstract]	'
Allowance for loan losses by portfolio	'
	The following tables illustrate the changes in the allowance for loan losses by our portfolio segments for the three months ended March 31, 2014 and 2013:
								Residential
	Three months ended March 31	Commercial			Consumer			Real Estate
		Loans			Loans			Mortgages			Unallocated		Total
	Balance as of December 31, 2013	$	35,090		$	27,694		$	6,520		$	130	$	69,434
	Charge-offs		(479	)		(4,032	)		(319	)		-		(4,830	)
	Recoveries		399			741			94			-		1,234
	Provision		(573	)		4,033			(70	)		206		3,596
	Ending Balance as of March 31, 2014	$	34,437		$	28,436		$	6,225		$	336	$	69,434
	Balance as of December 31, 2012	$	35,624		$	27,162		$	6,252		$	296	$	69,334
	Charge-offs		(3,322	)		(3,723	)		(671	)		-		(7,716	)
	Recoveries		467			977			14			-		1,458
	Provision		2,589			1,869			1,113			87		5,658
	Ending Balance as of March 31, 2013	$	35,358		$	26,285		$	6,708		$	383	$	68,734
	The following tables illustrate the allowance for loan losses and the recorded investment by portfolio segments as of March 31, 2014 and December 31, 2013:
	Allowance for Loan Losses and Recorded Investment in Loans
	(in thousands)
								Residential
		Commercial			Consumer			Real Estate
		Loans			Loans			Mortgages			Unallocated		Total
	As of March 31, 2014
	Allowance for loan losses	$	34,437		$	28,436		$	6,225		$	336	$	69,434
	Allowance for loans individually evaluated for impairment		925			-			-					925
	Allowance for loans collectively evaluated for impairment	$	33,512		$	28,436		$	6,225		$	336	$	68,509
	Ending balance of loans	$	2,436,202		$	1,989,030		$	1,056,793				$	5,482,025
	Ending balance of originated loans individually evaluated for impairment		15,025			4,248			2,722					21,995
	Ending balance of acquired loans individually evaluated for impairment		9,873			-			-					9,873
	Ending balance of acquired loans collectively evaluated for impairment		385,669			199,196			300,360					885,225
	Ending balance of originated loans collectively evaluated for impairment	$	2,025,635		$	1,785,586		$	753,711				$	4,564,932
	As of December 31, 2013
	Allowance for loan losses	$	35,090		$	27,694		$	6,520		$	130	$	69,434
	Allowance for loans individually evaluated for impairment		715			-			-					715
	Allowance for loans collectively evaluated for impairment	$	34,375		$	27,694		$	6,520		$	130	$	68,719
	Ending balance of loans	$	2,392,621		$	1,972,537		$	1,041,637				$	5,406,795
	Ending balance of originated loans individually evaluated for impairment		16,120			3,248			2,012					21,380
	Ending balance of acquired loans individually evaluated for impairment		10,060			-			-					10,060
	Ending balance of acquired loans collectively evaluated for impairment		392,329			219,587			308,416					920,332
	Ending balance of originated loans collectively evaluated for impairment	$	1,974,112		$	1,749,702		$	731,209				$	4,455,023
Past due and nonperforming loans by loan class	'
	The following table illustrates the Company’s nonaccrual loans by loan class:
	Loans on Nonaccrual Status as of:
	(In thousands)	31-Mar-14			31-Dec-13
	ORIGINATED
	Commercial Loans
	Commercial	$	3,644		$	3,669
	Commercial Real Estate		7,282			7,834
	Agricultural		1,366			1,135
	Agricultural Real Estate		1,758			961
	Business Banking		5,708			5,701
			19,758			19,300
	Consumer Loans
	Indirect		1,549			1,461
	Home Equity		7,074			5,931
	Direct		76			86
			8,699			7,478
	Residential Real Estate Mortgages		6,905			7,105
		$	35,362		$	33,883
	ACQUIRED
	Commercial Loans
	Commercial	$	6,477		$	6,599
	Commercial Real Estate		3,493			3,559
	Business Banking		1,037			1,340
			11,007			11,498
	Consumer Loans
	Indirect		129			93
	Home Equity		808			570
	Direct		38			49
			975			712
	Residential Real Estate Mortgages		4,120			3,872
		$	16,102		$	16,082
	TOTAL NONACCRUAL LOANS	$	51,464		$	49,965
	The following tables set forth information with regard to past due and nonperforming loans by loan class as of March 31, 2014 and December 31, 2013:
	Age Analysis of Past Due Financing Receivables
	As of March 31, 2014
	(in thousands)
								Greater Than
		31-60 Days			61-90 Days			90 Days			Total							Recorded
		Past Due			Past Due			Past Due			Past Due							Total
		Accruing			Accruing			Accruing			Accruing		Non-Accrual			Current		Loans
	ORIGINATED
	Commercial Loans
	Commercial	$	-		$	409		$	-		$	409	$	3,644		$	631,041	$	635,094
	Commercial Real Estate		367			69			-			436		7,282			959,156		966,874
	Agricultural		-			-			-			-		1,366			60,979		62,345
	Agricultural Real Estate		136			-			-			136		1,758			36,719		38,613
	Business Banking		1,151			159			158			1,468		5,708			330,558		337,734
			1,654			637			158			2,449		19,758			2,018,453		2,040,660
	Consumer Loans
	Indirect		9,189			2,061			1,286			12,536		1,549			1,203,341		1,217,426
	Home Equity		5,403			2,032			583			8,018		7,074			502,372		517,464
	Direct		413			90			52			555		76			54,313		54,944
			15,005			4,183			1,921			21,109		8,699			1,760,026		1,789,834
	Residential Real Estate Mortgages		3,307			1,076			444			4,827		6,905			744,701		756,433
		$	19,966		$	5,896		$	2,523		$	28,385	$	35,362		$	4,523,180	$	4,586,927
	ACQUIRED
	Commercial Loans
	Commercial	$	150		$	-		$	-		$	150	$	6,477		$	97,406	$	104,033
	Commercial Real Estate		-			-			-			-		3,493			219,524		223,017
	Business Banking		45			-			-			45		1,037			67,410		68,492
			195			-			-			195		11,007			384,340		395,542
	Consumer Loans
	Indirect		575			84			50			709		129			107,501		108,339
Home Equity		288			93			112			493		808			83,044		84,345
Direct		99			8			15			122		38			6,352		6,512
		962			185			177			1,324		975			196,897		199,196
Residential Real Estate Mortgages		1,329			39			-			1,368		4,120			294,872		300,360
	$	2,486		$	224		$	177		$	2,887	$	16,102		$	876,109	$	895,098
Total Loans	$	22,452		$	6,120		$	2,700		$	31,272	$	51,464		$	5,399,289	$	5,482,025
Age Analysis of Past Due Financing Receivables
As of December 31, 2013
(in thousands)
							Greater Than
	31-60 Days			61-90 Days			90 Days			Total							Recorded
	Past Due			Past Due			Past Due			Past Due							Total
	Accruing			Accruing			Accruing			Accruing		Non-Accrual			Current		Loans
ORIGINATED
Commercial Loans
Commercial	$	105		$	247		$	-		$	352	$	3,669		$	612,402	$	616,423
Commercial Real Estate		1,366			-			-			1,366		7,834			925,116		934,316
Agricultural		150			21			-			171		1,135			63,856		65,162
Agricultural Real Estate		519			-			-			519		961			35,172		36,652
Business Banking		1,228			122			105			1,455		5,701			330,523		337,679
		3,368			390			105			3,863		19,300			1,967,069		1,990,232
Consumer Loans
Indirect		14,093			2,878			1,583			18,554		1,461			1,141,829		1,161,844
Home Equity		6,033			1,888			1,115			9,036		5,931			517,856		532,823
Direct		679			125			46			850		86			57,347		58,283
		20,805			4,891			2,744			28,440		7,478			1,717,032		1,752,950
Residential Real Estate Mortgages		3,951			379			808			5,138		7,105			720,978		733,221
	$	28,124		$	5,660		$	3,657		$	37,441	$	33,883		$	4,405,079	$	4,476,403
ACQUIRED
Commercial Loans
Commercial	$	24		$	-		$	-		$	24	$	6,599		$	96,603	$	103,226
Commercial Real Estate		-			-			-			-		3,559			225,455		229,014
Business Banking		320			2			-			322		1,340			68,487		70,149
		344			2			-			346		11,498			390,545		402,389
Consumer Loans
Indirect		939			113			71			1,123		93			123,870		125,086
Home Equity		753			63			-			816		570			85,690		87,076
Direct		76			56			9			141		49			7,235		7,425
		1,768			232			80			2,080		712			216,795		219,587
Residential Real Estate Mortgages		1,725			-			-			1,725		3,872			302,819		308,416
	$	3,837		$	234		$	80		$	4,151	$	16,082		$	910,159	$	930,392
Total Loans	$	31,961		$	5,894		$	3,737		$	41,592	$	49,965		$	5,315,238	$	5,406,795
Impaired loans and specific reserve allocations	'
	The following table provides information on loans specifically evaluated for impairment as of March 31, 2014 and December 31, 2013:
		31-Mar-14									31-Dec-13
		Recorded			Unpaid						Recorded		Unpaid
		Investment			Principal						Investment		Principal
		Balance			Balance			Related			Balance		Balance			Related
	(in thousands)	(Book)			(Legal)			Allowance			(Book)		(Legal)			Allowance
	ORIGINATED
	With no related allowance recorded:
	Commercial Loans
	Commercial	$	2,026		$	2,096					$	4,721	$	4,777
	Commercial Real Estate		7,252			7,823						4,613		5,164
	Agricultural		124			195						125		195
	Agricultural Real Estate		1,418			1,697						1,431		1,708
	Business Banking		172			564						210		602
	Total Commercial Loans		10,992			12,375						11,100		12,446
	Consumer Loans
	Home Equity		4,248			4,534						3,248		3,472
	Residential Real Estate Mortgages		2,722			3,036						2,012		2,255
	Total		17,962			19,945						16,360		18,173
	With an allowance recorded:
	Commercial Loans
	Commercial Real Estate		4,033			5,890			925			5,020		6,877			715
	ACQUIRED
	With no related allowance recorded:
	Commercial Loans
	Commercial		6,380			6,538						6,501		6,538
	Commercial Real Estate		3,493			3,842						3,559		3,842
	Total Commercial Loans		9,873			10,380						10,060		10,380
	Total:	$	31,868		$	36,215		$	925		$	31,440	$	35,430		$	715
	The following tables summarize the average recorded investments on impaired loans specifically evaluated for impairment and the interest income recognized for the three ended March 31, 2014 and 2013:
		For the three months ended
		31-Mar-14						31-Mar-13
		Average						Average
		Recorded			Interest Income			Recorded			Interest Income
	(in thousands)	Investment			Recognized			Investment			Recognized
	ORIGINATED
	Commercial Loans
	Commercial	$	2,038		$	-		$	5,069		$	29
	Commercial Real Estate		11,553			42			12,339			72
	Agricultural		125			-			378			3
	Agricultural Real Estate		1,424			12			900			12
	Business Banking		185			12			80			-
	Consumer Loans
	Home Equity		4,282			43			2,901			29
	Residential Real Estate Mortgage		2,727			23			2,065			11
	Total Originated	$	22,334		$	132		$	23,732		$	156
	ACQUIRED
	Commercial Loans
	Commercial		6,436			-			-			-
	Commercial Real Estate		3,524			-			-			-
	TotalAcquired	$	9,960		$	-		$	-		$	-
	Total Loans	$	32,294		$	132		$	23,732		$	156
Financing receivable credit quality by loan class	'
	The following tables illustrate the Company’s credit quality by loan class as of March 31, 2014 and December 31, 2013:
	Credit Quality Indicators
	As of March 31, 2014
	ORIGINATED
	Commercial Credit Exposure				Commercial						Agricultural
	By Internally Assigned Grade:	Commercial			Real Estate			Agricultural			Real Estate		Total
	Pass	$	585,553		$	910,431		$	57,573		$	34,754	$	1,588,311
	Special Mention		12,755			20,924			366			7		34,052
	Substandard		36,786			35,519			4,394			3,852		80,551
	Doubtful		-			-			12			-		12
	Total	$	635,094		$	966,874		$	62,345		$	38,613	$	1,702,926
	Business Banking Credit Exposure
	By Internally Assigned Grade:	Business Banking											Total
	Non-classified	$	319,727										$	319,727
	Classified		18,007											18,007
	Total	$	337,734										$	337,734
	Consumer Credit Exposure
	By Payment Activity:	Indirect			Home Equity			Direct					Total
	Performing	$	1,214,591		$	509,807		$	54,816				$	1,779,214
	Nonperforming		2,835			7,657			128					10,620
	Total	$	1,217,426		$	517,464		$	54,944				$	1,789,834
	Residential Mortgage Credit Exposure	Residential
	By Payment Activity:	Mortgage											Total
	Performing	$	749,084										$	749,084
	Nonperforming		7,349											7,349
	Total	$	756,433										$	756,433
	Credit Quality Indicators
	As of March 31, 2014
	ACQUIRED
	Commercial Credit Exposure				Commercial
	By Internally Assigned Grade:	Commercial			Real Estate			Agricultural			Total
	Pass	$	88,439		$	204,582		$	-		$	293,021
	Special Mention		2,010			2,699			-			4,709
	Substandard		13,584			15,736			-			29,320
	Doubtful		-			-			-			-
	Total	$	104,033		$	223,017		$	-		$	327,050
	Business Banking Credit Exposure
	By Internally Assigned Grade:	Business Banking									Total
	Non-classified	$	63,332								$	63,332
	Classified		5,160									5,160
	Total	$	68,492								$	68,492
	Consumer Credit Exposure
	By Payment Activity:	Indirect			Home Equity			Direct			Total
	Performing	$	108,160		$	83,425		$	6,459		$	198,044
	Nonperforming		179			920			53			1,152
	Total	$	108,339		$	84,345		$	6,512		$	199,196
	Residential Mortgage Credit Exposure	Residential
	By Payment Activity:	Mortgage									Total
	Performing	$	296,240								$	296,240
	Nonperforming		4,120									4,120
	Total	$	300,360								$	300,360
	Credit Quality Indicators
	As of December 31, 2013
	ORIGINATED
	Commercial Credit Exposure				Commercial						Agricultural
	By Internally Assigned Grade:	Commercial			Real Estate			Agricultural			Real Estate		Total
	Pass	$	576,079		$	878,411		$	60,043		$	33,136	$	1,547,669
	Special Mention		16,836			22,777			381			43		40,037
	Substandard		23,508			33,128			4,726			3,473		64,835
	Doubtful		-			-			12			-		12
	Total	$	616,423		$	934,316		$	65,162		$	36,652	$	1,652,553
	Business Banking Credit Exposure
	By Internally Assigned Grade:	Business Banking											Total
Non-classified	$	319,578										$	319,578
Classified		18,101											18,101
Total	$	337,679										$	337,679
Consumer Credit Exposure
By Payment Activity:	Indirect			Home Equity			Direct					Total
Performing	$	1,158,800		$	525,777		$	58,151				$	1,742,728
Nonperforming		3,044			7,046			132					10,222
Total	$	1,161,844		$	532,823		$	58,283				$	1,752,950
Residential Mortgage Credit Exposure	Residential
By Payment Activity:	Mortgage											Total
Performing	$	725,308										$	725,308
Nonperforming		7,913											7,913
Total	$	733,221										$	733,221
Credit Quality Indicators
As of December 31, 2013
ACQUIRED
Commercial Credit Exposure				Commercial
By Internally Assigned Grade:	Commercial			Real Estate			Agricultural			Total
Pass	$	85,692		$	205,010		$	-		$	290,702
Special Mention		2,230			6,183			-			8,413
Substandard		15,304			17,821			-			33,125
Doubtful		-			-			-			-
Total	$	103,226		$	229,014		$	-		$	332,240
Business Banking Credit Exposure
By Internally Assigned Grade:	Business Banking									Total
Non-classified	$	65,437								$	65,437
Classified		4,712									4,712
Total	$	70,149								$	70,149
Consumer Credit Exposure
By Payment Activity:	Indirect			Home Equity			Direct			Total
Performing	$	124,922		$	86,506		$	7,367		$	218,795
Nonperforming		164			570			58			792
Total	$	125,086		$	87,076		$	7,425		$	219,587
Residential Mortgage Credit Exposure	Residential
By Payment Activity:	Mortgage									Total
Performing	$	304,544								$	304,544
Nonperforming		3,872									3,872
Total	$	308,416								$	308,416

Defined_Benefit_Postretirement2

Defined Benefit Postretirement Plans (Tables)	3 Months Ended
	Mar. 31, 2014
Defined Benefit Postretirement Plans [Abstract]	'
Components of Net Periodic Pension Benefits and Other Benefit Costs	'
	The components of expense for Pension Benefits and Other Benefits are set forth below (in thousands):
		Pension Benefits						Other Benefits
		Three months ended March 31,						Three months ended March 31,
	Components of net periodic (benefit) cost:	2014			2013			2014			2013
	Service cost	$	587		$	604		$	4		$	6
	Interest cost		1,040			722			90			34
	Expected return on plan assets		(2,175	)		(1,825	)		-			-
	Net amortization		25			603			(6	)		223
	Total (benefit) cost	$	(523	)	$	104		$	88		$	263

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Reconciliation of basic and diluted earnings per share	'
	The following is a reconciliation of basic and diluted earnings per share for the periods presented in the consolidated statements of income.
	Three months ended March 31,	2014		2013
	(in thousands, except per share data)
	Basic EPS:
	Weighted average common shares outstanding		43,762		36,410
	Net income available to common shareholders		18,009		7,649
	Basic EPS	$	0.41	$	0.21
	Diluted EPS:
	Weighted average common shares outstanding		43,762		36,410
	Dilutive effect of common stock options and restricted stock		505		384
	Weighted average common shares and common share equivalents		44,267		36,794
	Net income available to common shareholders		18,009		7,649
	Diluted EPS	$	0.41	$	0.21

Reclassification_Adjustments_O1

Reclassification Adjustments Out of Other Comprehensive (Loss) Income (Tables)	3 Months Ended
	Mar. 31, 2014
Reclassification Adjustments Out of Other Comprehensive (Loss) income [Abstract]	'
Reclassification out of Accumulated Other Comprehensive Income	'
	The following table summarizes the reclassification adjustments out of accumulated other comprehensive loss (in thousands):
	Detail About Accumulated Other Comprehensive	Amount reclassified from accumulated other						Affected line item in the
	(Loss) Income Components	comprehensive income (loss)						consolidated statement of
								comprehensive income
		Three months ended
		31-Mar-14			31-Mar-13
	Available for sale securities:
	Gains on available for sale securities	$	(7	)	$	(1,145	)	Net securities gains
	Tax benefit		3			454		Income tax expense
	Net of tax	$	(4	)	$	(691	)
	Pension and other benefits:
	Amortization of net gains	$	74		$	882		Salaries and employee benefits
	Amortization of prior service costs		(55	)		(56	)	Salaries and employee benefits
	Tax benefit		8			323		Income tax expense
	Net of tax	$	11		$	503
	Total reclassifications during the period, net of tax	$	7		$	(188	)

Fair_Values_Measurements_and_F2

Fair Values Measurements and Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]	'
Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis	'
	The following tables set forth the Company’s financial assets and liabilities measured on a recurring basis that were accounted for at fair value.  Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands):
	March 31, 2014:
		Quoted Prices in		Significant		Significant
		Active Markets for		Other		Unobservable		Balance
		Identical Assets		Observable Inputs		Inputs		as of
		(Level 1)		(Level 2)		(Level 3)		31-Mar-14
	Assets:
	Securities Available for Sale:
	U.S. Treasury	$	33,473	$	-	$	-	$	33,473
	Federal Agency		-		300,158		-		300,158
	State & municipal		-		112,695		-		112,695
	Mortgage-backed		-		378,158		-		378,158
	Collateralized mortgage obligations		-		537,647		-		537,647
	Other securities		7,238		8,216		-		15,454
	Total Securities Available for Sale	$	40,711	$	1,336,874	$	-	$	1,377,585
	Trading Securities		6,954		-		-		6,954
	Interest Rate Swaps		-		1,283		-		1,283
	Total	$	47,665	$	1,338,157	$	-	$	1,385,822
	Liabilities:
	Interest Rate Swaps	$	-	$	1,283	$	-	$	1,283
	Total	$	-	$	1,283	$	-	$	1,283
	December 31, 2013:
		Quoted Prices in		Significant		Significant
		Active Markets for		Other		Unobservable		Balance
		Identical Assets		Observable Inputs		Inputs		as of
		(Level 1)		(Level 2)		(Level 3)		31-Dec-13
	Assets:
	Securities Available for Sale:
	U.S. Treasury	$	43,616	$	-	$	-	$	43,616
	Federal Agency		-		278,915		-		278,915
	State & municipal		-		113,665		-		113,665
	Mortgage-backed		-		364,164		-		364,164
	Collateralized mortgage obligations		-		549,528		-		549,528
	Other securities		6,796		8,197		-		14,993
	Total Securities Available for Sale	$	50,412	$	1,314,469	$	-	$	1,364,881
	Trading Securities		5,779		-		-		5,779
	Interest Rate Swaps		-		281		-		281
	Total	$	56,191	$	1,314,750	$	-	$	1,370,941
	Liabilities:
	Interest Rate Swaps	$	-	$	281	$	-	$	281
	Total	$	-	$	281	$	-	$	281
Fair Value of Financial Instruments By Balance Sheet Grouping	'
	The following table sets forth information with regard to estimated fair values of financial instruments at March 31, 2014 and December 31, 2013.  This table excludes financial instruments for which the carrying amount approximates fair value.  Financial instruments for which the fair value approximates carrying value include cash and cash equivalents, securities available for sale, trading securities, accrued interest receivable, non-maturity deposits, short-term borrowings, accrued interest payable, and interest rate swaps.
				31-Mar-14				31-Dec-13
	(In thousands)	Fair		Carrying		Estimated		Carrying		Estimated
		Value		amount		fair value		amount		fair value
		Hierarchy
	Financial assets
	Securities held to maturity		2	$	117,896	$	114,920	$	117,283	$	113,276
	Net loans		3		5,412,591		5,460,326		5,337,361		5,386,520
	Financial liabilities
	Time deposits		2	$	969,361	$	969,980	$	1,021,142	$	1,023,982
	Long-term debt		2		308,679		323,712		308,823		325,195
	Junior subordinated debt		2		101,196		105,864		101,196		105,121

Securities_Details

Securities (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	Position		Position
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	$1,383,839,000	'	$1,379,751,000
Unrealized gains	15,357,000	'	14,737,000
Unrealized losses	21,611,000	'	29,607,000
Estimated fair value	1,377,585,000	'	1,364,881,000
Sales transactions of securities available for sale [Abstract]	'	'	'
Proceeds from sales	0	2,600,000	'
Gross realized gains	0	1,100,000	'
Loss on sales	0	0	'
Amortized costs of securities available for sale pledged to secure public deposits	1,500,000,000	'	1,400,000,000
Amortized costs of securities available for sale pledged as collateral for repurchase agreements	224,900,000	'	218,400,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	1,705,294,000	'	812,106,000
12 Months or Longer, Fair Value	72,477,000	'	9,842,000
Total, Fair Value	1,777,771,000	'	821,948,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-18,227,000	'	-29,201,000
12 months or longer Unrealized Losses	-3,384,000	'	-406,000
Total Unrealized Losses	-21,611,000	'	-29,607,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	283	'	314
12 Months or Longer, Number of Positions	13	'	2
Total, Number of Positions	296	'	316
Schedule of Held-to-maturity Securities [Line Items]	'	'	'
Amortized cost	117,896,000	'	117,283,000
Unrealized gains	481,000	'	570,000
Unrealized losses	3,457,000	'	4,577,000
Estimated fair value	114,920,000	'	113,276,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	59,648,000	'	58,468,000
12 Months or Longer, Fair Value	0	'	0
Total, Fair Value	59,648,000	'	58,468,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less Than 12 Months, Unrealized Losses	-3,457,000	'	-4,577,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Unrealized Losses	-3,457,000	'	-4,577,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	8	'	6
12 Months or Longer, Number of Positions	0	'	0
Total, Number of Positions	8	'	6
Consolidated stockholders' equity threshold percentage that no single issuer of securities exceeded except for U.S. Government securities. (in hundredths)	10.00%	'	'
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]	'	'	'
Within one year	27,461,000	'	'
From one to five years	302,113,000	'	'
From five to ten years	259,225,000	'	'
After ten years	782,201,000	'	'
Total, Amortized Cost	1,371,000,000	'	'
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Within one year	27,627,000	'	'
From one to five years	301,603,000	'	'
From five to ten years	259,821,000	'	'
After ten years	773,080,000	'	'
Total, Fair Value	1,362,131,000	'	'
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]	'	'	'
Within one year	24,714,000	'	'
From one to five years	21,654,000	'	'
From five to ten years	8,401,000	'	'
After ten years	63,127,000	'	'
Securities held to maturity	117,896,000	'	117,283,000
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Within one year	24,765,000	'	'
From one to five years	21,957,000	'	'
From five to ten years	8,395,000	'	'
After ten years	59,803,000	'	'
Total, Fair Value	114,920,000	'	113,276,000
State & Municipal [Member]	'	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'	'
Amortized cost	56,042,000	'	54,305,000
Unrealized gains	361,000	'	442,000
Unrealized losses	13,000	'	8,000
Estimated fair value	56,390,000	'	54,739,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	2,120,000	'	1,012,000
12 Months or Longer, Fair Value	0	'	0
Total, Fair Value	2,120,000	'	1,012,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less Than 12 Months, Unrealized Losses	-13,000	'	-8,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Unrealized Losses	-13,000	'	-8,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	3	'	1
12 Months or Longer, Number of Positions	0	'	0
Total, Number of Positions	3	'	1
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]	'	'	'
Securities held to maturity	56,042,000	'	54,305,000
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Total, Fair Value	56,390,000	'	54,739,000
Mortgage backed [Member]	'	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'	'
Amortized cost	881,000	'	953,000
Unrealized gains	120,000	'	128,000
Unrealized losses	0	'	0
Estimated fair value	1,001,000	'	1,081,000
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]	'	'	'
Securities held to maturity	881,000	'	953,000
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Total, Fair Value	1,001,000	'	1,081,000
Collateralized Mortgage Obligations [Member]	'	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'	'
Amortized cost	60,973,000	'	62,025,000
Unrealized gains	0	'	0
Unrealized losses	3,444,000	'	4,569,000
Estimated fair value	57,529,000	'	57,456,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	57,528,000	'	57,456,000
12 Months or Longer, Fair Value	0	'	0
Total, Fair Value	57,528,000	'	57,456,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less Than 12 Months, Unrealized Losses	-3,444,000	'	-4,569,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Unrealized Losses	-3,444,000	'	-4,569,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	5	'	5
12 Months or Longer, Number of Positions	0	'	0
Total, Number of Positions	5	'	5
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]	'	'	'
Securities held to maturity	60,973,000	'	62,025,000
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Total, Fair Value	57,529,000	'	57,456,000
US Treasury [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	33,204,000	'	43,279,000
Unrealized gains	269,000	'	337,000
Unrealized losses	0	'	0
Estimated fair value	33,473,000	'	43,616,000
Federal Agency [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	305,245,000	'	285,880,000
Unrealized gains	430,000	'	343,000
Unrealized losses	5,517,000	'	7,308,000
Estimated fair value	300,158,000	'	278,915,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	245,397,000	'	233,935,000
12 Months or Longer, Fair Value	9,704,000	'	9,619,000
Total, Fair Value	255,101,000	'	243,554,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-5,221,000	'	-6,927,000
12 months or longer Unrealized Losses	-296,000	'	-381,000
Total Unrealized Losses	-5,517,000	'	-7,308,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	21	'	20
12 Months or Longer, Number of Positions	1	'	1
Total, Number of Positions	22	'	21
Mortgage-Backed [Member]	'	'	'
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	1,110,605,000	'	143,080,000
12 Months or Longer, Fair Value	960,000	'	0
Total, Fair Value	1,111,565,000	'	143,080,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-1,465,000	'	-2,216,000
12 months or longer Unrealized Losses	-10,000	'	0
Total Unrealized Losses	-1,475,000	'	-2,216,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	58	'	79
12 Months or Longer, Number of Positions	4	'	0
Total, Number of Positions	62	'	79
Mortgage-Backed [Member] | Government-sponsored enterprises [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	351,748,000	'	337,666,000
Unrealized gains	6,164,000	'	5,788,000
Unrealized losses	1,404,000	'	2,131,000
Estimated fair value	356,508,000	'	341,323,000
Mortgage-Backed [Member] | U.S. government agency securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	20,781,000	'	21,924,000
Unrealized gains	940,000	'	1,002,000
Unrealized losses	71,000	'	85,000
Estimated fair value	21,650,000	'	22,841,000
State & Municipal [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	111,583,000	'	113,435,000
Unrealized gains	1,967,000	'	1,842,000
Unrealized losses	855,000	'	1,612,000
Estimated fair value	112,695,000	'	113,665,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	48,377,000	'	50,328,000
12 Months or Longer, Fair Value	934,000	'	0
Total, Fair Value	49,311,000	'	50,328,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-839,000	'	-1,612,000
12 months or longer Unrealized Losses	-16,000	'	0
Total Unrealized Losses	-855,000	'	-1,612,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	171	'	177
12 Months or Longer, Number of Positions	3	'	0
Total, Number of Positions	174	'	177
Collateralized Mortgage Obligations [Member]	'	'	'
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	295,408,000	'	379,273,000
12 Months or Longer, Fair Value	60,681,000	'	0
Total, Fair Value	356,089,000	'	379,273,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-10,516,000	'	-18,243,000
12 months or longer Unrealized Losses	-3,012,000	'	0
Total Unrealized Losses	-13,528,000	'	-18,243,000
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	31	'	36
12 Months or Longer, Number of Positions	4	'	0
Total, Number of Positions	35	'	36
Collateralized Mortgage Obligations [Member] | Government-sponsored enterprises [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	501,563,000	'	521,257,000
Unrealized gains	2,080,000	'	1,777,000
Unrealized losses	13,411,000	'	18,141,000
Estimated fair value	490,232,000	'	504,893,000
Collateralized Mortgage Obligations [Member] | U.S. government agency securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	46,876,000	'	43,943,000
Unrealized gains	656,000	'	794,000
Unrealized losses	117,000	'	102,000
Estimated fair value	47,415,000	'	44,635,000
Other Securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized cost	12,839,000	'	12,367,000
Unrealized gains	2,851,000	'	2,854,000
Unrealized losses	236,000	'	228,000
Estimated fair value	15,454,000	'	14,993,000
Unrealized Loss Position, Fair Value [Abstract]	'	'	'
Less Than 12 Months, Fair Value	5,507,000	'	5,490,000
12 Months or Longer, Fair Value	198,000	'	223,000
Total, Fair Value	5,705,000	'	5,713,000
Unrealized Loss Position, Unrealized Losses [Abstract]	'	'	'
Less than 12 months Unrealized Losses	-186,000	'	-203,000
12 months or longer Unrealized Losses	-50,000	'	-25,000
Total Unrealized Losses	($236,000)	'	($228,000)
Unrealized Loss Position, Number of Positions [Abstract]	'	'	'
Less Than 12 Months, Number of Positions	2	'	2
12 Months or Longer, Number of Positions	1	'	1
Total, Number of Positions	3	'	3

Allowance_for_Loan_Losses_and_3

Allowance for Loan Losses and Credit Quality of Loans (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
	Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Loan portfolio segments	3
Commercial Loans [Member] | Commercial Real Estate [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Real estate loan amount, percentage of appraised value or purchase price of the property, maximum (in hundredths)	80.00%
Commercial Loans [Member] | Agricultural Real Estate [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Real estate loan amount, percentage of appraised value or purchase price of the property, maximum (in hundredths)	75.00%
Consumer Loans [Member] | Business Banking [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Business banking loans, maximum amount	0.5
Consumer Loans [Member] | Indirect [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Percentage of automobile financing to indirect relationships with dealers (in hundredths)	75.00%
Principal repayment term of loan, minimum	'3 years
Principal repayment term of loan, maximum	'6 years
Consumer Loans [Member] | Home Equity [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Home equity loan amount, percentage of equity in home, maximum (in hundredths)	85.00%
Consumer Loans [Member] | Direct [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Principal repayment term of loan, minimum	'1 year
Principal repayment term of loan, maximum	'10 years
Residential Real Estate Mortgages [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Real estate loan amount, percentage of appraised value or purchase price of the property, maximum (in hundredths)	85.00%

Allowance_for_Loan_Losses_and_4

Allowance for Loan Losses and Credit Quality of Loans, Allowance for Loan Losses (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'
Balance as of Beginning of Period	$69,434,000	'	'
Balance as of Ending of Period	69,434,000	'	'
Allowance for loan losses for acquired loan portfolio	0	0	'
Provision expense and net charge-offs related to acquired loans	200,000	200,000	'
Allowance loan losses [Abstract]	'	'	'
Allowance for loan losses	69,434,000	'	'
Allowance for loans individually evaluated for impairment	925,000	'	715,000
Allowance for loans collectively evaluated for impairment	68,509,000	'	68,719,000
Ending balance of loans	5,482,025,000	'	5,406,795,000
Commercial Loans [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'
Balance as of Beginning of Period	35,090,000	35,624,000	'
Charge-offs	-479,000	-3,322,000	'
Recoveries	399,000	467,000	'
Provision	-573,000	2,589,000	'
Balance as of Ending of Period	34,437,000	35,358,000	'
Allowance loan losses [Abstract]	'	'	'
Allowance for loan losses	34,437,000	35,358,000	'
Allowance for loans individually evaluated for impairment	925,000	'	715,000
Allowance for loans collectively evaluated for impairment	33,512,000	'	34,375,000
Ending balance of loans	2,436,202,000	'	2,392,621,000
Consumer Loans [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'
Balance as of Beginning of Period	27,694,000	27,162,000	'
Charge-offs	-4,032,000	-3,723,000	'
Recoveries	741,000	977,000	'
Provision	4,033,000	1,869,000	'
Balance as of Ending of Period	28,436,000	26,285,000	'
Allowance loan losses [Abstract]	'	'	'
Allowance for loan losses	28,436,000	26,285,000	'
Allowance for loans individually evaluated for impairment	0	'	0
Allowance for loans collectively evaluated for impairment	28,436,000	'	27,694,000
Ending balance of loans	1,989,030,000	'	1,972,537,000
Residential Real Estate Mortgages [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'
Balance as of Beginning of Period	6,520,000	6,252,000	'
Charge-offs	-319,000	-671,000	'
Recoveries	94,000	14,000	'
Provision	-70,000	1,113,000	'
Balance as of Ending of Period	6,225,000	6,708,000	'
Allowance loan losses [Abstract]	'	'	'
Allowance for loan losses	6,225,000	6,708,000	'
Allowance for loans individually evaluated for impairment	0	'	0
Allowance for loans collectively evaluated for impairment	6,225,000	'	6,520,000
Ending balance of loans	1,056,793,000	'	1,041,637,000
Unallocated [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'
Balance as of Beginning of Period	130,000	296,000	'
Charge-offs	0	0	'
Recoveries	0	0	'
Provision	206,000	87,000	'
Balance as of Ending of Period	336,000	383,000	'
Allowance loan losses [Abstract]	'	'	'
Allowance for loan losses	336,000	383,000	'
Allowance for loans collectively evaluated for impairment	336,000	'	130,000
Originated Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans	4,586,927,000	'	4,476,403,000
Ending balance of loans individually evaluated for impairment	21,995,000	'	21,380,000
Ending balance of loans collectively evaluated for impairment	4,564,932,000	'	4,455,023,000
Originated Loans [Member] | Commercial Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	15,025,000	'	16,120,000
Ending balance of loans collectively evaluated for impairment	2,025,635,000	'	1,974,112,000
Originated Loans [Member] | Consumer Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	4,248,000	'	3,248,000
Ending balance of loans collectively evaluated for impairment	1,785,586,000	'	1,749,702,000
Originated Loans [Member] | Residential Real Estate Mortgages [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	2,722,000	'	2,012,000
Ending balance of loans collectively evaluated for impairment	753,711,000	'	731,209,000
Acquired Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans	895,098,000	'	930,392,000
Ending balance of loans individually evaluated for impairment	9,873,000	'	10,060,000
Ending balance of loans collectively evaluated for impairment	885,225,000	'	920,332,000
Acquired Loans [Member] | Commercial Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	9,873,000	'	10,060,000
Ending balance of loans collectively evaluated for impairment	385,669,000	'	392,329,000
Acquired Loans [Member] | Consumer Loans [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	0	'	0
Ending balance of loans collectively evaluated for impairment	199,196,000	'	219,587,000
Acquired Loans [Member] | Residential Real Estate Mortgages [Member]	'	'	'
Allowance loan losses [Abstract]	'	'	'
Ending balance of loans individually evaluated for impairment	0	'	0
Ending balance of loans collectively evaluated for impairment	$300,360,000	'	$308,416,000

Allowance_for_Loan_Losses_and_5

Allowance for Loan Losses and Credit Quality of Loans, Past Due Loans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
Minimum number of days past due for nonaccrual loan status	'90 days	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	$22,452	$31,961
61 - 90 Days Past Due Accruing	6,120	5,894
Greater Than 90 Days Past Due Accruing	2,700	3,737
Total Past Due Accruing	31,272	41,592
Non-Accrual	51,464	49,965
Current	5,399,289	5,315,238
Ending balance of loans	5,482,025	5,406,795
Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	19,966	28,124
61 - 90 Days Past Due Accruing	5,896	5,660
Greater Than 90 Days Past Due Accruing	2,523	3,657
Total Past Due Accruing	28,385	37,441
Non-Accrual	35,362	33,883
Current	4,523,180	4,405,079
Ending balance of loans	4,586,927	4,476,403
ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	2,486	3,837
61 - 90 Days Past Due Accruing	224	234
Greater Than 90 Days Past Due Accruing	177	80
Total Past Due Accruing	2,887	4,151
Non-Accrual	16,102	16,082
Current	876,109	910,159
Ending balance of loans	895,098	930,392
Commercial Loans [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
Non-Accrual	19,758	19,300
Commercial Loans [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
Non-Accrual	11,007	11,498
Commercial Loans [Member] | Commercial [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	0	105
61 - 90 Days Past Due Accruing	409	247
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	409	352
Non-Accrual	3,644	3,669
Current	631,041	612,402
Ending balance of loans	635,094	616,423
Commercial Loans [Member] | Commercial [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	150	24
61 - 90 Days Past Due Accruing	0	0
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	150	24
Non-Accrual	6,477	6,599
Current	97,406	96,603
Ending balance of loans	104,033	103,226
Commercial Loans [Member] | Commercial Real Estate [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	367	1,366
61 - 90 Days Past Due Accruing	69	0
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	436	1,366
Non-Accrual	7,282	7,834
Current	959,156	925,116
Ending balance of loans	966,874	934,316
Commercial Loans [Member] | Commercial Real Estate [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	0	0
61 - 90 Days Past Due Accruing	0	0
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	0	0
Non-Accrual	3,493	3,559
Current	219,524	225,455
Ending balance of loans	223,017	229,014
Commercial Loans [Member] | Agricultural [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	0	150
61 - 90 Days Past Due Accruing	0	21
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	0	171
Non-Accrual	1,366	1,135
Current	60,979	63,856
Ending balance of loans	62,345	65,162
Commercial Loans [Member] | Agricultural Real Estate [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	136	519
61 - 90 Days Past Due Accruing	0	0
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	136	519
Non-Accrual	1,758	961
Current	36,719	35,172
Ending balance of loans	38,613	36,652
Commercial Loans [Member] | Business Banking [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	1,151	1,228
61 - 90 Days Past Due Accruing	159	122
Greater Than 90 Days Past Due Accruing	158	105
Total Past Due Accruing	1,468	1,455
Non-Accrual	5,708	5,701
Current	330,558	330,523
Ending balance of loans	337,734	337,679
Commercial Loans [Member] | Business Banking [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	45	320
61 - 90 Days Past Due Accruing	0	2
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	45	322
Non-Accrual	1,037	1,340
Current	67,410	68,487
Ending balance of loans	68,492	70,149
Commercial Loans [Member] | Total Commercial Loan [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	1,654	3,368
61 - 90 Days Past Due Accruing	637	390
Greater Than 90 Days Past Due Accruing	158	105
Total Past Due Accruing	2,449	3,863
Non-Accrual	19,758	19,300
Current	2,018,453	1,967,069
Ending balance of loans	2,040,660	1,990,232
Commercial Loans [Member] | Total Commercial Loan [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	195	344
61 - 90 Days Past Due Accruing	0	2
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	195	346
Non-Accrual	11,007	11,498
Current	384,340	390,545
Ending balance of loans	395,542	402,389
Consumer Loans [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
Non-Accrual	8,699	7,478
Consumer Loans [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
Non-Accrual	975	712
Consumer Loans [Member] | Indirect [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	9,189	14,093
61 - 90 Days Past Due Accruing	2,061	2,878
Greater Than 90 Days Past Due Accruing	1,286	1,583
Total Past Due Accruing	12,536	18,554
Non-Accrual	1,549	1,461
Current	1,203,341	1,141,829
Ending balance of loans	1,217,426	1,161,844
Consumer Loans [Member] | Indirect [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	575	939
61 - 90 Days Past Due Accruing	84	113
Greater Than 90 Days Past Due Accruing	50	71
Total Past Due Accruing	709	1,123
Non-Accrual	129	93
Current	107,501	123,870
Ending balance of loans	108,339	125,086
Consumer Loans [Member] | Home Equity Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	5,403	6,033
61 - 90 Days Past Due Accruing	2,032	1,888
Greater Than 90 Days Past Due Accruing	583	1,115
Total Past Due Accruing	8,018	9,036
Non-Accrual	7,074	5,931
Current	502,372	517,856
Ending balance of loans	517,464	532,823
Consumer Loans [Member] | Home Equity Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	288	753
61 - 90 Days Past Due Accruing	93	63
Greater Than 90 Days Past Due Accruing	112	0
Total Past Due Accruing	493	816
Non-Accrual	808	570
Current	83,044	85,690
Ending balance of loans	84,345	87,076
Consumer Loans [Member] | Direct [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	413	679
61 - 90 Days Past Due Accruing	90	125
Greater Than 90 Days Past Due Accruing	52	46
Total Past Due Accruing	555	850
Non-Accrual	76	86
Current	54,313	57,347
Ending balance of loans	54,944	58,283
Consumer Loans [Member] | Direct [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	99	76
61 - 90 Days Past Due Accruing	8	56
Greater Than 90 Days Past Due Accruing	15	9
Total Past Due Accruing	122	141
Non-Accrual	38	49
Current	6,352	7,235
Ending balance of loans	6,512	7,425
Consumer Loans [Member] | Total Consumer Loan [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	15,005	20,805
61 - 90 Days Past Due Accruing	4,183	4,891
Greater Than 90 Days Past Due Accruing	1,921	2,744
Total Past Due Accruing	21,109	28,440
Non-Accrual	8,699	7,478
Current	1,760,026	1,717,032
Ending balance of loans	1,789,834	1,752,950
Consumer Loans [Member] | Total Consumer Loan [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	962	1,768
61 - 90 Days Past Due Accruing	185	232
Greater Than 90 Days Past Due Accruing	177	80
Total Past Due Accruing	1,324	2,080
Non-Accrual	975	712
Current	196,897	216,795
Ending balance of loans	199,196	219,587
Residential Real Estate Mortgages [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	3,307	3,951
61 - 90 Days Past Due Accruing	1,076	379
Greater Than 90 Days Past Due Accruing	444	808
Total Past Due Accruing	4,827	5,138
Non-Accrual	6,905	7,105
Current	744,701	720,978
Ending balance of loans	756,433	733,221
Residential Real Estate Mortgages [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
31 - 60 Days Past Due Accruing	1,329	1,725
61 - 90 Days Past Due Accruing	39	0
Greater Than 90 Days Past Due Accruing	0	0
Total Past Due Accruing	1,368	1,725
Non-Accrual	4,120	3,872
Current	294,872	302,819
Ending balance of loans	$300,360	$308,416

Allowance_for_Loan_Losses_and_6

Allowance for Loan Losses and Credit Quality of Loans, Impaired Loans (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Allowance for Loan Losses and Credit Quality of Loans [Abstract]	'	'	'
Minimum balance for classified loans to be evaluated individually for impairment	$500,000	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	31,868,000	'	31,440,000
Unpaid Principal Balance (Legal)	36,215,000	'	34,430,000
Related Allowance	925,000	'	715,000
Average Recorded Investment	32,294,000	23,732,000	'
Interest Income Recognized	132,000	156,000	'
Originated Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	22,334,000	23,732,000	'
Interest Income Recognized	132,000	156,000	'
Acquired Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	9,960,000	0	'
Interest Income Recognized	0	0	'
Commercial Loans [Member] | Business Banking [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	185,000	80,000	'
Interest Income Recognized	12,000	0	'
Commercial Loans [Member] | Originated Loans [Member] | Commercial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	2,038,000	5,069,000	'
Interest Income Recognized	0	29,000	'
Commercial Loans [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	11,553,000	12,339,000	'
Interest Income Recognized	42,000	72,000	'
Commercial Loans [Member] | Originated Loans [Member] | Agricultural [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	125,000	378,000	'
Interest Income Recognized	0	3,000	'
Commercial Loans [Member] | Originated Loans [Member] | Agricultural Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	1,424,000	900,000	'
Interest Income Recognized	12,000	12,000	'
Commercial Loans [Member] | Acquired Loans [Member] | Commercial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	6,436,000	0	'
Interest Income Recognized	0	0	'
Commercial Loans [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	3,524,000	0	'
Interest Income Recognized	0	0	'
Consumer Loans [Member] | Originated Loans [Member] | Home Equity [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	4,282,000	2,901,000	'
Interest Income Recognized	43,000	29,000	'
Residential Real Estate Mortgages [Member] | Originated Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	2,727,000	2,065,000	'
Interest Income Recognized	23,000	11,000	'
With No Allowance Recorded [Member] | Originated Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	17,962,000	'	16,360,000
Unpaid Principal Balance (Legal)	19,945,000	'	18,173,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Commercial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	2,026,000	'	4,721,000
Unpaid Principal Balance (Legal)	2,096,000	'	4,777,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	7,252,000	'	4,613,000
Unpaid Principal Balance (Legal)	7,823,000	'	5,164,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Agricultural [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	124,000	'	125,000
Unpaid Principal Balance (Legal)	195,000	'	195,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Agricultural Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	1,418,000	'	1,431,000
Unpaid Principal Balance (Legal)	1,697,000	'	1,708,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Business Banking [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	172,000	'	210,000
Unpaid Principal Balance (Legal)	564,000	'	602,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Total Commercial Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	10,992,000	'	11,100,000
Unpaid Principal Balance (Legal)	12,375,000	'	12,446,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Acquired Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	9,873,000	'	10,060,000
Unpaid Principal Balance (Legal)	10,380,000	'	10,380,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Acquired Loans [Member] | Commercial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	6,380,000	'	6,501,000
Unpaid Principal Balance (Legal)	6,538,000	'	6,538,000
With No Allowance Recorded [Member] | Commercial Loans [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	3,493,000	'	3,559,000
Unpaid Principal Balance (Legal)	3,842,000	'	3,842,000
With No Allowance Recorded [Member] | Consumer Loans [Member] | Originated Loans [Member] | Home Equity [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	4,248,000	'	3,248,000
Unpaid Principal Balance (Legal)	4,534,000	'	3,472,000
With No Allowance Recorded [Member] | Residential Real Estate Mortgages [Member] | Originated Loans [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	2,722,000	'	2,012,000
Unpaid Principal Balance (Legal)	3,036,000	'	2,255,000
With An Allowance Recorded [Member] | Commercial Loans [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Balance (Book)	4,033,000	'	5,020,000
Unpaid Principal Balance (Legal)	5,890,000	'	6,877,000
Related Allowance	$925,000	'	$715,000

Allowance_for_Loan_Losses_and_7

Allowance for Loan Losses and Credit Quality of Loans, Credit Quality by Loan Class (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commercial Credit Exposure [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	$327,050	$332,240
Commercial Credit Exposure [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,702,926	1,652,553
Commercial Credit Exposure [Member] | Pass [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	293,021	290,702
Commercial Credit Exposure [Member] | Pass [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,588,311	1,547,669
Commercial Credit Exposure [Member] | Special Mention [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	4,709	8,413
Commercial Credit Exposure [Member] | Special Mention [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	34,052	40,037
Commercial Credit Exposure [Member] | Substandard [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	29,320	33,125
Commercial Credit Exposure [Member] | Substandard [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	80,551	64,835
Commercial Credit Exposure [Member] | Doubtful [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Doubtful [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	12	12
Commercial Credit Exposure [Member] | Commercial [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	104,033	103,226
Commercial Credit Exposure [Member] | Commercial [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	635,094	616,423
Commercial Credit Exposure [Member] | Commercial [Member] | Pass [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	88,439	85,692
Commercial Credit Exposure [Member] | Commercial [Member] | Pass [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	585,553	576,079
Commercial Credit Exposure [Member] | Commercial [Member] | Special Mention [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	2,010	2,230
Commercial Credit Exposure [Member] | Commercial [Member] | Special Mention [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	12,755	16,836
Commercial Credit Exposure [Member] | Commercial [Member] | Substandard [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	13,584	15,304
Commercial Credit Exposure [Member] | Commercial [Member] | Substandard [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	36,786	23,508
Commercial Credit Exposure [Member] | Commercial [Member] | Doubtful [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Commercial [Member] | Doubtful [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	223,017	229,014
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	966,874	934,316
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Pass [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	204,582	205,010
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Pass [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	910,431	878,411
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Special Mention [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	2,699	6,183
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Special Mention [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	20,924	22,777
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Substandard [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	15,736	17,821
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Substandard [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	35,519	33,128
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Doubtful [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Doubtful [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	62,345	65,162
Commercial Credit Exposure [Member] | Agricultural [Member] | Pass [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | Pass [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	57,573	60,043
Commercial Credit Exposure [Member] | Agricultural [Member] | Special Mention [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | Special Mention [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	366	381
Commercial Credit Exposure [Member] | Agricultural [Member] | Substandard [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | Substandard [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	4,394	4,726
Commercial Credit Exposure [Member] | Agricultural [Member] | Doubtful [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Commercial Credit Exposure [Member] | Agricultural [Member] | Doubtful [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	12	12
Commercial Credit Exposure [Member] | Agricultural Real Estate [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	38,613	36,652
Commercial Credit Exposure [Member] | Agricultural Real Estate [Member] | Pass [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	34,754	33,136
Commercial Credit Exposure [Member] | Agricultural Real Estate [Member] | Special Mention [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7	43
Commercial Credit Exposure [Member] | Agricultural Real Estate [Member] | Substandard [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	3,852	3,473
Commercial Credit Exposure [Member] | Agricultural Real Estate [Member] | Doubtful [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	0	0
Consumer Credit Exposure [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	199,196	219,587
Consumer Credit Exposure [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,789,834	1,752,950
Consumer Credit Exposure [Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,152	792
Consumer Credit Exposure [Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	10,620	10,222
Consumer Credit Exposure [Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	198,044	218,795
Consumer Credit Exposure [Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,779,214	1,742,728
Consumer Credit Exposure [Member] | Indirect [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	108,339	125,086
Consumer Credit Exposure [Member] | Indirect [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,217,426	1,161,844
Consumer Credit Exposure [Member] | Indirect [Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	179	164
Consumer Credit Exposure [Member] | Indirect [Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	2,835	3,044
Consumer Credit Exposure [Member] | Indirect [Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	108,160	124,922
Consumer Credit Exposure [Member] | Indirect [Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,214,591	1,158,800
Consumer Credit Exposure [Member] | Home Equity Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	84,345	87,076
Consumer Credit Exposure [Member] | Home Equity Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	517,464	532,823
Consumer Credit Exposure [Member] | Home Equity Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	920	570
Consumer Credit Exposure [Member] | Home Equity Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7,657	7,046
Consumer Credit Exposure [Member] | Home Equity Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	83,425	86,506
Consumer Credit Exposure [Member] | Home Equity Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	509,807	525,777
Consumer Credit Exposure [Member] | Direct [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	6,512	7,425
Consumer Credit Exposure [Member] | Direct [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	54,944	58,283
Consumer Credit Exposure [Member] | Direct [Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	53	58
Consumer Credit Exposure [Member] | Direct [Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	128	132
Consumer Credit Exposure [Member] | Direct [Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	6,459	7,367
Consumer Credit Exposure [Member] | Direct [Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	54,816	58,151
Residential Mortgage Credit Exposure [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	300,360	308,416
Residential Mortgage Credit Exposure [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	756,433	733,221
Residential Mortgage Credit Exposure [Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	4,120	3,872
Residential Mortgage Credit Exposure [Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7,349	7,913
Residential Mortgage Credit Exposure [Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	296,240	304,544
Residential Mortgage Credit Exposure [Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	749,084	725,308
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	300,360	308,416
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	756,433	733,221
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | Nonperforming [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	4,120	3,872
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | Nonperforming [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7,349	7,913
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | Performing [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	296,240	304,544
Residential Mortgage Credit Exposure [Member] | Residential Mortgage [Member] | Performing [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	749,084	725,308
Business Banking Credit Exposure [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	68,492	70,149
Business Banking Credit Exposure [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	337,734	337,679
Business Banking Credit Exposure [Member] | Non-classified [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	63,332	65,437
Business Banking Credit Exposure [Member] | Non-classified [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	319,727	319,578
Business Banking Credit Exposure [Member] | Classified [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	5,160	4,712
Business Banking Credit Exposure [Member] | Classified [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	18,007	18,101
Business Banking Credit Exposure [Member] | Business Banking [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	68,492	70,149
Business Banking Credit Exposure [Member] | Business Banking [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	337,734	337,679
Business Banking Credit Exposure [Member] | Business Banking [Member] | Non-classified [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	63,332	65,437
Business Banking Credit Exposure [Member] | Business Banking [Member] | Non-classified [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	319,727	319,578
Business Banking Credit Exposure [Member] | Business Banking [Member] | Classified [Member] | ACQUIRED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	5,160	4,712
Business Banking Credit Exposure [Member] | Business Banking [Member] | Classified [Member] | ORIGINATED [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	$18,007	$18,101

Allowance_for_Loan_Losses_and_8

Allowance for Loan Losses and Credit Quality of Loans, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'
Period of sustained repayment performance for nonperforming TDRs to be returned to performing status	'6 months	'
Home Equity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of contracts	22	10
Pre-modification outstanding recorded investment	$1,100,000	$600,000
Residential Real Estate Mortgages [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of contracts	12	1
Pre-modification outstanding recorded investment	1,000,000	100,000
Subsequent Default [Member] | Home Equity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of contracts	1	'
Pre-modification outstanding recorded investment	11,000	'
Subsequent Default [Member] | Residential Real Estate Mortgages [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of contracts	1	'
Pre-modification outstanding recorded investment	$100,000	'

Defined_Benefit_Postretirement3

Defined Benefit Postretirement Plans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'
Transition obligation period of recognition	'20 years	'
Pension Benefits [Member]	'	'
Components of net periodic benefit cost [Abstract]	'	'
Service cost	$587	$604
Interest cost	1,040	722
Expected return on plan assets	-2,175	-1,825
Net amortization	25	603
Total cost (benefit)	-523	104
Other Benefits [Member]	'	'
Components of net periodic benefit cost [Abstract]	'	'
Service cost	4	6
Interest cost	90	34
Expected return on plan assets	0	0
Net amortization	-6	223
Total cost (benefit)	$88	$263

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Basic EPS [Abstract]	'	'
Weighted average common shares outstanding (in shares)	43,762,000	36,410,000
Net income available to common shareholders	$18,009	$7,649
Basic EPS (in dollars per share)	$0.41	$0.21
Diluted EPS [Abstract]	'	'
Weighted average common shares outstanding (in shares)	43,762,000	36,410,000
Dilutive effect of common stock options and restricted stock (in shares)	505,000	384,000
Weighted average common shares and common share equivalents (in shares)	44,267,000	36,794,000
Net income available to common shareholders	$18,009	$7,649
Diluted EPS (in dollars per share)	$0.41	$0.21
Stock Options [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Stock options excluded from calculation of diluted EPS (in shares)	479,543	1,171,825

Reclassification_Adjustments_O2

Reclassification Adjustments Out of Other Comprehensive (Loss) Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Net securities gains	$7	$1,145
Salaries and employee benefits	29,534	27,047
Tax benefit	8,672	3,357
Net Income	18,009	7,649
Total reclassification during the period, net of tax	7	-188
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Net securities gains	-7	-1,145
Tax benefit	3	454
Net Income	-4	-691
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Tax benefit	8	323
Net Income	11	503
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of net gains [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Salaries and employee benefits	74	882
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of prior service costs [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Salaries and employee benefits	($55)	($56)

Fair_Values_Measurements_and_F3

Fair Values Measurements and Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Securities Available for Sale [Abstract]	'	'
Total Securities Available for Sale	$1,377,585,000	$1,364,881,000
Trading Securities	6,954,000	5,779,000
Liabilities [Abstract]	'	'
Collateral dependent impaired financing receivable with specific reserves	4,000,000	5,000,000
Allowance for loan and lease losses collateral dependent impaired loans with specific reserves	900,000	700,000
Liquidation expense ratio on impaired collateral minimum (in hundredths)	10.00%	'
Liquidation expense ratio on impaired collateral maximum (in hundredths)	35.00%	'
Financial assets [Abstract]	'	'
Securities held to maturity	114,920,000	113,276,000
Financial liabilities [Abstract]	'	'
Time deposits	969,361,000	1,021,142,000
Long-term debt	308,679,000	308,823,000
Junior subordinated debt	101,196,000	101,196,000
Significant Other Observable Inputs (Level 2) [Member] | Carrying Amount [Member]	'	'
Financial assets [Abstract]	'	'
Securities held to maturity	117,896,000	117,283,000
Financial liabilities [Abstract]	'	'
Time deposits	969,361,000	1,021,142,000
Long-term debt	308,679,000	308,823,000
Junior subordinated debt	101,196,000	101,196,000
Significant Other Observable Inputs (Level 2) [Member] | Estimated Fair Value [Member]	'	'
Financial assets [Abstract]	'	'
Securities held to maturity	114,920,000	113,276,000
Financial liabilities [Abstract]	'	'
Time deposits	969,980,000	1,023,982,000
Long-term debt	323,712,000	325,195,000
Junior subordinated debt	105,864,000	105,121,000
Significant Unobservable Inputs (Level 3) [Member] | Carrying Amount [Member]	'	'
Financial assets [Abstract]	'	'
Net Loans	5,412,591,000	5,337,361,000
Significant Unobservable Inputs (Level 3) [Member] | Estimated Fair Value [Member]	'	'
Financial assets [Abstract]	'	'
Net Loans	5,460,326,000	5,386,520,000
Recurring Basis [Member]	'	'
Securities Available for Sale [Abstract]	'	'
U.S. Treasury	33,473,000	43,616,000
Federal Agency	300,158,000	278,915,000
State & municipal	112,695,000	113,665,000
Mortgage-backed	378,158,000	364,164,000
Collateralized mortgage obligations	537,647,000	549,528,000
Other securities	15,454,000	14,993,000
Total Securities Available for Sale	1,377,585,000	1,364,881,000
Trading Securities	6,954,000	5,779,000
Interest Rate Swaps	1,283,000	281,000
Total	1,385,822,000	1,370,941,000
Liabilities [Abstract]	'	'
Interest Rate Swaps	1,283,000	281,000
Total	1,283,000	281,000
Recurring Basis [Member] | Quoted Prices in Active Market for Identical Assets (Level I) [Member]	'	'
Securities Available for Sale [Abstract]	'	'
U.S. Treasury	33,473,000	43,616,000
Federal Agency	0	0
State & municipal	0	0
Mortgage-backed	0	0
Collateralized mortgage obligations	0	0
Other securities	7,238,000	6,796,000
Total Securities Available for Sale	40,711,000	50,412,000
Trading Securities	6,954,000	5,779,000
Interest Rate Swaps	0	0
Total	47,665,000	56,191,000
Liabilities [Abstract]	'	'
Interest Rate Swaps	0	0
Total	0	0
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'
Securities Available for Sale [Abstract]	'	'
U.S. Treasury	0	0
Federal Agency	300,158,000	278,915,000
State & municipal	112,695,000	113,665,000
Mortgage-backed	378,158,000	364,164,000
Collateralized mortgage obligations	537,647,000	549,528,000
Other securities	8,216,000	8,197,000
Total Securities Available for Sale	1,336,874,000	1,314,469,000
Trading Securities	0	0
Interest Rate Swaps	1,283,000	281,000
Total	1,338,157,000	1,314,750,000
Liabilities [Abstract]	'	'
Interest Rate Swaps	1,283,000	281,000
Total	1,283,000	281,000
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'
Securities Available for Sale [Abstract]	'	'
U.S. Treasury	0	0
Federal Agency	0	0
State & municipal	0	0
Mortgage-backed	0	0
Collateralized mortgage obligations	0	0
Other securities	0	0
Total Securities Available for Sale	0	0
Trading Securities	0	0
Interest Rate Swaps	0	0
Total	0	0
Liabilities [Abstract]	'	'
Interest Rate Swaps	0	0
Total	$0	$0

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commitment to Extend Credits and Unused Lines of Credit [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Commitments - maximum potential obligation	$1,100	$1,100
Standby Letters of Credit [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Commitments - maximum potential obligation	38.3	36.8
Obligation instrument term	'5 years	'
Commercial Letters of Credit [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Commitments - maximum potential obligation	$41	$41.30

Subsequent_Event_Details

Subsequent Event (Details) (Subsequent Event [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Apr. 17, 2014
	SchoolsandHealthcare
Subsequent Event [Member]	'
Subsequent Event [Line Items]	'
Percentage of ownership interest sold (in hundredths)	20.00%
Original acquisition price of ownership interest	$3
Proceeds from sale of ownership interest	$140
Number of schools and healthcare providers	14,000