Loans and Leases (Details 3) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases $ 3,259,560 $ 3,196,507
Less: unearned income and deferred costs and fees (2,091) (2,223)
Total loans and leases, net 3,257,469 3,194,284
Commercial and Industrial - Agriculture [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 49,828 74,788
Commercial and Industrial Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 729,891 690,942
Commercial and industrial, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 779,719 765,730
Commercial Real Estate - Construction [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 93,301 85,794
Commercial Real Estate - Agriculture [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 60,340 55,762
Commercial Real Estate Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 1,282,060 1,269,758
Commercial real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 1,435,701 1,411,314
Residential Real Estate - Home equity [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 241,453 238,992
Residential Real Estate - Mortgages [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 719,189 694,302
Residential real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 960,642 933,294
Consumer and other - Indirect [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 18,825 21,207
Consumer and other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 35,446 33,531
Consumer and other, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 54,271 54,738
Finance Leases [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 8,317 5,563
Covered Loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 20,910 25,868
Orginated Loans and Leases [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 3,811 5,762
90 days or more 14,933 23,166
Current Loans 2,658,318 2,500,539
Total loans and leases 2,677,062 2,529,467
90 days and accruing 395 607
Nonaccrual 16,319 29,875
Less: unearned income and deferred costs and fees (2,091) (2,223)
Total loans and leases, net 2,674,971 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 49,828 74,788
Total loans and leases 49,828 74,788
90 days and accruing 0 0
Nonaccrual 0 0
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 169 211
90 days or more 508 1,187
Current Loans 626,613 561,041
Total loans and leases 627,290 562,439
90 days and accruing 0 0
Nonaccrual 1,639 1,260
Orginated Loans and Leases [Member] | Commercial and industrial, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 169 211
90 days or more 508 1,187
Current Loans 676,441 635,829
Total loans and leases 677,118 637,227
90 days and accruing 0 0
Nonaccrual 1,639 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 0 7,657
Current Loans 51,988 38,568
Total loans and leases 51,988 46,441
90 days and accruing 0 0
Nonaccrual 534 9,873
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 180
90 days or more 29 0
Current Loans 57,129 52,447
Total loans and leases 57,158 52,627
90 days and accruing 0 0
Nonaccrual 132 46
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 473 1,104
90 days or more 4,325 6,976
Current Loans 955,548 895,240
Total loans and leases 960,346 903,320
90 days and accruing 0 161
Nonaccrual 5,162 9,522
Orginated Loans and Leases [Member] | Commercial real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 473 1,500
90 days or more 4,354 14,633
Current Loans 1,064,665 986,255
Total loans and leases 1,069,492 1,002,388
90 days and accruing 0 161
Nonaccrual 5,828 19,441
Orginated Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 1,175 784
90 days or more 1,384 1,248
Current Loans 179,785 169,777
Total loans and leases 182,994 171,809
90 days and accruing 60 62
Nonaccrual 1,550 1,477
Orginated Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 1,250 2,439
90 days or more 6,964 5,946
Current Loans 676,943 650,581
Total loans and leases 685,989 658,966
90 days and accruing 335 384
Nonaccrual 6,850 7,443
Orginated Loans and Leases [Member] | Residential real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 2,425 3,223
90 days or more 8,348 7,194
Current Loans 856,728 820,358
Total loans and leases 868,983 830,775
90 days and accruing 395 446
Nonaccrual 8,400 8,920
Orginated Loans and Leases [Member] | Consumer and other - Indirect [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 508 768
90 days or more 0 152
Current Loans 18,317 20,282
Total loans and leases 18,825 21,202
90 days and accruing 0 0
Nonaccrual 72 216
Orginated Loans and Leases [Member] | Consumer and other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 236 60
90 days or more 241 0
Current Loans 33,850 32,252
Total loans and leases 34,327 32,312
90 days and accruing 0 0
Nonaccrual 380 38
Orginated Loans and Leases [Member] | Consumer and other, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 744 828
90 days or more 241 152
Current Loans 52,167 52,534
Total loans and leases 53,152 53,514
90 days and accruing 0 0
Nonaccrual 452 254
Orginated Loans and Leases [Member] | Finance Leases [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 0
90 days or more 0 0
Current Loans 8,317 5,563
Total loans and leases 8,317 5,563
90 days and accruing 0 0
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 736 1,532
90 days or more 7,263 11,998
Current Loans 574,499 653,510
Total loans and leases 582,498 667,040
90 days and accruing 4,320 6,973
Nonaccrual 4,998 8,508
Less: unearned income and deferred costs and fees 0 0
Total loans and leases, net 582,498 667,040
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 0 554
90 days or more 941 1,651
Current Loans 101,660 126,298
Total loans and leases 102,601 128,503
90 days and accruing 649 1,231
Nonaccrual 761 419
Acquired Loans and Leases [Member] | Commercial and industrial, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 554
90 days or more 941 1,651
Current Loans 101,660 126,298
Total loans and leases 102,601 128,503
90 days and accruing 649 1,231
Nonaccrual 761 419
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 1,970 2,148
Current Loans 39,343 37,205
Total loans and leases 41,313 39,353
90 days and accruing 1,709 1,676
Nonaccrual 466 473
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 3,182 3,135
Total loans and leases 3,182 3,135
90 days and accruing 0 0
Nonaccrual 0 0
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 403
90 days or more 1,857 3,585
Current Loans 319,857 362,450
Total loans and leases 321,714 366,438
90 days and accruing 79 709
Nonaccrual 2,084 3,450
Acquired Loans and Leases [Member] | Commercial real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 403
90 days or more 3,827 5,733
Current Loans 362,382 402,790
Total loans and leases 366,209 408,926
90 days and accruing 1,788 2,385
Nonaccrual 2,550 3,923
Acquired Loans and Leases [Member] | Residential Real Estate - Home equity [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 156 213
90 days or more 643 934
Current Loans 57,660 66,036
Total loans and leases 58,459 67,183
90 days and accruing 173 347
Nonaccrual 660 1,844
Acquired Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 580 345
90 days or more 703 1,264
Current Loans 31,917 33,727
Total loans and leases 33,200 35,336
90 days and accruing 561 594
Nonaccrual 1,027 2,322
Acquired Loans and Leases [Member] | Residential real estate, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 736 558
90 days or more 1,346 2,198
Current Loans 89,577 99,763
Total loans and leases 91,659 102,519
90 days and accruing 734 941
Nonaccrual 1,687 4,166
Acquired Loans and Leases [Member] | Consumer and other - Indirect [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days   0
90 days or more   0
Current Loans   5
Total loans and leases 0 5
90 days and accruing   0
Nonaccrual   0
Acquired Loans and Leases [Member] | Consumer and other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 17
90 days or more 0 0
Current Loans 1,119 1,202
Total loans and leases 1,119 1,219
90 days and accruing 0 0
Nonaccrual 0 0
Acquired Loans and Leases [Member] | Consumer and other, total [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 17
90 days or more 0 0
Current Loans 1,119 1,207
Total loans and leases 1,119 1,224
90 days and accruing 0 0
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 0 0
90 days or more 1,149 2,416
Current Loans 19,761 23,452
Total loans and leases 20,910 25,868
90 days and accruing 1,149 2,416
Nonaccrual $ 0 $ 0