Loans and Leases (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	$ 3,206,453		$ 3,196,507
Less: unearned income and deferred costs and fees	(2,241)		(2,223)
Total loans and leases, net	3,204,212		3,194,284
Commercial and Industrial - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	53,261		74,788
Commercial and Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	707,662		690,942
Commercial and industrial, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	760,923		765,730
Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	94,035		85,794
Commercial Real Estate - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	60,280		55,762
Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	1,273,119		1,269,758
Commercial real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	1,427,434		1,411,314
Residential Real Estate - Home equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	237,208		238,992
Residential Real Estate - Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	698,039		694,302
Residential real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	935,247		933,294
Consumer and other - Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	19,904		21,207
Consumer and other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	33,310		33,531
Consumer and other, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	53,214		54,738
Finance Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	5,529		5,563
Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	24,106		25,868
Orginated Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	5,660		5,762
90 days or more	24,343		23,166
Current Loans	2,527,760		2,500,539
Total loans and leases	2,557,763		2,529,467
90 days and accruing	339	[1]	607	[1]
Nonaccrual	26,974		29,875
Less: unearned income and deferred costs and fees	(2,241)		(2,223)
Total loans and leases, net	2,555,522		2,527,244
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	0		0
90 days or more	0		0
Current Loans	53,261		74,788
Total loans and leases	53,261		74,788
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	971		211
90 days or more	410		1,187
Current Loans	576,403		561,041
Total loans and leases	577,784		562,439
90 days and accruing	0	[1]	0	[1]
Nonaccrual	413		1,260
Orginated Loans and Leases [Member] | Commercial and industrial, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	971		211
90 days or more	410		1,187
Current Loans	629,664		635,829
Total loans and leases	631,045		637,227
90 days and accruing	0	[1]	0	[1]
Nonaccrual	413		1,260
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	0		216
90 days or more	8,558		7,657
Current Loans	44,822		38,568
Total loans and leases	53,380		46,441
90 days and accruing	0	[1]	0	[1]
Nonaccrual	9,335		9,873
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	17		180
90 days or more	0		0
Current Loans	57,208		52,447
Total loans and leases	57,225		52,627
90 days and accruing	0	[1]	0	[1]
Nonaccrual	25		46
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	389		1,104
90 days or more	7,427		6,976
Current Loans	914,208		895,240
Total loans and leases	922,024		903,320
90 days and accruing	278	[1]	161	[1]
Nonaccrual	8,486		9,522
Orginated Loans and Leases [Member] | Commercial real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	406		1,500
90 days or more	15,985		14,633
Current Loans	1,016,238		986,255
Total loans and leases	1,032,629		1,002,388
90 days and accruing	278	[1]	161	[1]
Nonaccrual	17,846		19,441
Orginated Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	269		784
90 days or more	1,647		1,248
Current Loans	171,253		169,777
Total loans and leases	173,169		171,809
90 days and accruing	61	[1]	62	[1]
Nonaccrual	1,933		1,477
Orginated Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	2,971		2,439
90 days or more	6,098		5,946
Current Loans	654,266		650,581
Total loans and leases	663,335		658,966
90 days and accruing	0	[1]	384	[1]
Nonaccrual	6,545		7,443
Orginated Loans and Leases [Member] | Residential real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	3,240		3,223
90 days or more	7,745		7,194
Current Loans	825,519		820,358
Total loans and leases	836,504		830,775
90 days and accruing	61	[1]	446	[1]
Nonaccrual	8,478		8,920
Orginated Loans and Leases [Member] | Consumer and other - Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	462		768
90 days or more	203		152
Current Loans	19,237		20,282
Total loans and leases	19,902		21,202
90 days and accruing	0	[1]	0	[1]
Nonaccrual	234		216
Orginated Loans and Leases [Member] | Consumer and other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	523		60
90 days or more	0		0
Current Loans	31,631		32,252
Total loans and leases	32,154		32,312
90 days and accruing	0	[1]	0	[1]
Nonaccrual	3		38
Orginated Loans and Leases [Member] | Consumer and other, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	985		828
90 days or more	203		152
Current Loans	50,868		52,534
Total loans and leases	52,056		53,514
90 days and accruing	0	[1]	0	[1]
Nonaccrual	237		254
Orginated Loans and Leases [Member] | Finance Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	58		0
90 days or more	0		0
Current Loans	5,471		5,563
Total loans and leases	5,529		5,563
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Orginated Loans and Leases [Member] | Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	0		0
Acquired Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	2,928		1,532
90 days or more	9,241		11,998
Current Loans	636,521		653,510
Total loans and leases	648,690		667,040
90 days and accruing	4,881	[1]	6,973	[1]
Nonaccrual	6,936		8,508
Less: unearned income and deferred costs and fees			0
Total loans and leases, net	648,690		667,040
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	0		0
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	368		554
90 days or more	1,488		1,651
Current Loans	128,022		126,298
Total loans and leases	129,878		128,503
90 days and accruing	859	[1]	1,231	[1]
Nonaccrual	930		419
Acquired Loans and Leases [Member] | Commercial and industrial, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	368		554
90 days or more	1,488		1,651
Current Loans	128,022		126,298
Total loans and leases	129,878		128,503
90 days and accruing	859	[1]	1,231	[1]
Nonaccrual	930		419
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	0		0
90 days or more	2,160		2,148
Current Loans	38,495		37,205
Total loans and leases	40,655		39,353
90 days and accruing	1,691	[1]	1,676	[1]
Nonaccrual	469		473
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	0		0
90 days or more	0		0
Current Loans	3,055		3,135
Total loans and leases	3,055		3,135
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	956		403
90 days or more	2,251		3,585
Current Loans	347,888		362,450
Total loans and leases	351,095		366,438
90 days and accruing	341	[1]	709	[1]
Nonaccrual	3,130		3,450
Acquired Loans and Leases [Member] | Commercial real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	956		403
90 days or more	4,411		5,733
Current Loans	389,438		402,790
Total loans and leases	394,805		408,926
90 days and accruing	2,032	[1]	2,385	[1]
Nonaccrual	3,599		3,923
Acquired Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	265		213
90 days or more	956		934
Current Loans	62,818		66,036
Total loans and leases	64,039		67,183
90 days and accruing	351	[1]	347	[1]
Nonaccrual	773		1,844
Acquired Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	702		345
90 days or more	681		1,264
Current Loans	33,321		33,727
Total loans and leases	34,704		35,336
90 days and accruing	504	[1]	594	[1]
Nonaccrual	1,634		2,322
Acquired Loans and Leases [Member] | Residential real estate, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	967		558
90 days or more	1,637		2,198
Current Loans	96,139		99,763
Total loans and leases	98,743		102,519
90 days and accruing	855	[1]	941	[1]
Nonaccrual	2,407		4,166
Acquired Loans and Leases [Member] | Consumer and other - Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	0		0
90 days or more	0		0
Current Loans	2		5
Total loans and leases	2		5
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Acquired Loans and Leases [Member] | Consumer and other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	2		17
90 days or more	0		0
Current Loans	1,154		1,202
Total loans and leases	1,156		1,219
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Acquired Loans and Leases [Member] | Consumer and other, total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	2		17
90 days or more	0		0
Current Loans	1,156		1,207
Total loans and leases	1,158		1,224
90 days and accruing	0	[1]	0	[1]
Nonaccrual	0		0
Acquired Loans and Leases [Member] | Finance Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	0		0
Acquired Loans and Leases [Member] | Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 days	635		0
90 days or more	1,705		2,416
Current Loans	21,766		23,452
Total loans and leases	24,106		25,868
90 days and accruing	1,135	[1]	2,416	[1]
Nonaccrual	$ 0		$ 0

[1] Includes acquired loans that were recorded at fair value at the acquisition date.