Loans and Leases (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 3,206,453	$ 3,196,507
Less: unearned income and deferred costs and fees	(2,241)	(2,223)
Originated loans and leases, net of unearned income and deferred costs and fees	3,204,212	3,194,284
Commercial and Industrial - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	53,261	74,788
Commercial and Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	707,662	690,942
Commercial and industrial, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	760,923	765,730
Commercial Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	94,035	85,794
Commercial Real Estate - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	60,280	55,762
Commercial Real Estate Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,273,119	1,269,758
Commercial real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,427,434	1,411,314
Residential Real Estate - Home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	237,208	238,992
Residential Real Estate - Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	698,039	694,302
Residential real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	935,247	933,294
Consumer and other - Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	19,904	21,207
Consumer and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	33,310	33,531
Consumer and other, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	53,214	54,738
Finance Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	5,529	5,563
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	24,106	25,868
Orginated Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,557,763	2,529,467
Less: unearned income and deferred costs and fees	(2,241)	(2,223)
Originated loans and leases, net of unearned income and deferred costs and fees	2,555,522	2,527,244
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	53,261	74,788
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	577,784	562,439
Orginated Loans and Leases [Member] | Commercial and industrial, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	631,045	637,227
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	53,380	46,441
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	57,225	52,627
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	922,024	903,320
Orginated Loans and Leases [Member] | Commercial real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,032,629	1,002,388
Orginated Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	173,169	171,809
Orginated Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	663,335	658,966
Orginated Loans and Leases [Member] | Residential real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	836,504	830,775
Orginated Loans and Leases [Member] | Consumer and other - Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	19,902	21,202
Orginated Loans and Leases [Member] | Consumer and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	32,154	32,312
Orginated Loans and Leases [Member] | Consumer and other, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	52,056	53,514
Orginated Loans and Leases [Member] | Finance Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	5,529	5,563
Orginated Loans and Leases [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Acquired Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	648,690	667,040
Less: unearned income and deferred costs and fees	0	0
Originated loans and leases, net of unearned income and deferred costs and fees	648,690	667,040
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	129,878	128,503
Acquired Loans and Leases [Member] | Commercial and industrial, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	129,878	128,503
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	40,655	39,353
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,055	3,135
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	351,095	366,438
Acquired Loans and Leases [Member] | Commercial real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	394,805	408,926
Acquired Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	64,039	67,183
Acquired Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	34,704	35,336
Acquired Loans and Leases [Member] | Residential real estate, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	98,743	102,519
Acquired Loans and Leases [Member] | Consumer and other - Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2	5
Acquired Loans and Leases [Member] | Consumer and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,156	1,219
Acquired Loans and Leases [Member] | Consumer and other, total [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,158	1,224
Acquired Loans and Leases [Member] | Finance Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Acquired Loans and Leases [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 24,106	$ 25,868