Loans and Leases (Details 4) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases $ 3,196,507 $ 2,955,473
Less: unearned income and deferred costs and fees (2,223) (863)
Total loans and leases, net 3,194,284 2,954,610
Commercial and Industrial - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 74,788 77,777
Commercial and Industrial Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 690,942 614,303
Commercial and industrial, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 765,730 692,080
Commercial Real Estate - Construction
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 85,794 84,679
Commercial Real Estate - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 55,762 51,556
Commercial Real Estate Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 1,269,759 1,167,632
Commercial real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 1,411,314 1,303,867
Residential Real Estate - Home equity
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 238,992 241,377
Residential Real Estate - Mortgages
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 694,302 615,479
Residential real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 933,294 856,856
Consumer and other - Indirect
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 21,207 26,703
Consumer and other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 33,531 33,749
Consumer and other, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 54,738 60,452
Finance Leases
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 5,563 4,618
Covered Loans
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 25,868 37,600
Orginated Loans and Leases
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 5,762 7,990
90 days or more 23,166 28,075
Current Loans 2,500,539 2,097,904
Total loans and leases 2,529,467 2,133,969
90 days and accruing 607 [1] 257 [1]
Nonaccrual 29,875 33,388
Less: unearned income and deferred costs and fees (2,223) (863)
Total loans and leases, net 2,527,244 2,133,106
Orginated Loans and Leases | Commercial and Industrial - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 0
90 days or more 0 0
Current Loans 74,788 77,777
Total loans and leases 74,788 77,777
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 28
Orginated Loans and Leases | Commercial and Industrial Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 211 2,575
90 days or more 1,187 509
Current Loans 561,041 443,792
Total loans and leases 562,439 446,876
90 days and accruing 0 [1] 0 [1]
Nonaccrual 1,260 748
Orginated Loans and Leases | Commercial and industrial, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 211 2,575
90 days or more 1,187 509
Current Loans 635,829 521,569
Total loans and leases 637,227 524,653
90 days and accruing 0 [1] 0 [1]
Nonaccrual 1,260 776
Orginated Loans and Leases | Commercial Real Estate - Construction
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 216 91
90 days or more 7,657 8,469
Current Loans 38,568 33,045
Total loans and leases 46,441 41,605
90 days and accruing 0 [1] 0 [1]
Nonaccrual 9,873 10,306
Orginated Loans and Leases | Commercial Real Estate - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 180 212
90 days or more 0 0
Current Loans 52,447 48,097
Total loans and leases 52,627 48,309
90 days and accruing 0 [1] 0 [1]
Nonaccrual 46 22
Orginated Loans and Leases | Commercial Real Estate Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 1,104 1,232
90 days or more 6,976 9,541
Current Loans 895,240 711,500
Total loans and leases 903,320 722,273
90 days and accruing 161 [1] 0 [1]
Nonaccrual 9,522 13,168
Orginated Loans and Leases | Commercial real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 1,500 1,535
90 days or more 14,633 18,010
Current Loans 986,255 792,642
Total loans and leases 1,002,388 812,187
90 days and accruing 161 [1] 0 [1]
Nonaccrual 19,441 23,496
Orginated Loans and Leases | Residential Real Estate - Home equity
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 784 582
90 days or more 1,248 2,348
Current Loans 169,777 156,790
Total loans and leases 171,809 159,720
90 days and accruing 62 [1] 120 [1]
Nonaccrual 1,477 1,641
Orginated Loans and Leases | Residential Real Estate - Mortgages
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 2,439 2,303
90 days or more 5,946 6,975
Current Loans 650,581 564,583
Total loans and leases 658,966 573,861
90 days and accruing 384 [1] 137 [1]
Nonaccrual 7,443 7,182
Orginated Loans and Leases | Residential real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 3,223 2,885
90 days or more 7,194 9,323
Current Loans 820,358 721,373
Total loans and leases 830,775 733,581
90 days and accruing 446 [1] 257 [1]
Nonaccrual 8,920 8,823
Orginated Loans and Leases | Consumer and other - Indirect
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 768 869
90 days or more 152 233
Current Loans 20,282 25,577
Total loans and leases 21,202 26,679
90 days and accruing 0 [1] 0 [1]
Nonaccrual 216 277
Orginated Loans and Leases | Consumer and other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 60 126
90 days or more 0 0
Current Loans 32,252 32,125
Total loans and leases 32,312 32,251
90 days and accruing 0 [1] 0 [1]
Nonaccrual 38 16
Orginated Loans and Leases | Consumer and other, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 828 995
90 days or more 152 233
Current Loans 52,534 57,702
Total loans and leases 53,514 58,930
90 days and accruing 0 [1] 0 [1]
Nonaccrual 254 293
Orginated Loans and Leases | Finance Leases
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 0
90 days or more 0 0
Current Loans 5,563 4,618
Total loans and leases 5,563 4,618
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 0
Orginated Loans and Leases | Covered Loans
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 0 0
Acquired Loans and Leases
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 1,532 5,263
90 days or more 11,998 22,458
Current Loans 653,510 793,783
Total loans and leases 667,040 821,504
90 days and accruing 6,973 [1] 18,710 [1]
Nonaccrual 8,508 4,352
Less: unearned income and deferred costs and fees 0 0
Total loans and leases, net 667,040 821,504
Acquired Loans and Leases | Commercial and Industrial - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 0 0
Acquired Loans and Leases | Commercial and Industrial Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 554 13
90 days or more 1,651 1,646
Current Loans 126,298 165,768
Total loans and leases 128,503 167,427
90 days and accruing 1,231 [1] 1,082 [1]
Nonaccrual 419 564
Acquired Loans and Leases | Commercial and industrial, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 554 13
90 days or more 1,651 1,646
Current Loans 126,298 165,768
Total loans and leases 128,503 167,427
90 days and accruing 1,231 [1] 1,082 [1]
Nonaccrual 419 564
Acquired Loans and Leases | Commercial Real Estate - Construction
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 53
90 days or more 2,148 6,607
Current Loans 37,205 36,414
Total loans and leases 39,353 43,074
90 days and accruing 1,676 [1] 6,419 [1]
Nonaccrual 473 188
Acquired Loans and Leases | Commercial Real Estate - Agriculture
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 0
90 days or more 0 0
Current Loans 3,135 3,247
Total loans and leases 3,135 3,247
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 0
Acquired Loans and Leases | Commercial Real Estate Other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 403 1,139
90 days or more 3,585 5,043
Current Loans 362,450 439,177
Total loans and leases 366,438 445,359
90 days and accruing 709 [1] 3,790 [1]
Nonaccrual 3,450 1,330
Acquired Loans and Leases | Commercial real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 403 1,192
90 days or more 5,733 11,650
Current Loans 402,790 478,838
Total loans and leases 408,926 491,680
90 days and accruing 2,385 [1] 10,209 [1]
Nonaccrual 3,923 1,518
Acquired Loans and Leases | Residential Real Estate - Home equity
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 213 1,626
90 days or more 934 1,913
Current Loans 66,036 78,118
Total loans and leases 67,183 81,657
90 days and accruing 347 [1] 865 [1]
Nonaccrual 1,844 1,453
Acquired Loans and Leases | Residential Real Estate - Mortgages
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 345 1,416
90 days or more 1,264 2,968
Current Loans 33,727 37,234
Total loans and leases 35,336 41,618
90 days and accruing 594 [1] 2,282 [1]
Nonaccrual 2,322 808
Acquired Loans and Leases | Residential real estate, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 558 3,042
90 days or more 2,198 4,881
Current Loans 99,763 115,352
Total loans and leases 102,519 123,275
90 days and accruing 941 [1] 3,147 [1]
Nonaccrual 4,166 2,261
Acquired Loans and Leases | Consumer and other - Indirect
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 0
90 days or more 0 0
Current Loans 5 24
Total loans and leases 5 24
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 0
Acquired Loans and Leases | Consumer and other
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 17 2
90 days or more 0 9
Current Loans 1,202 1,487
Total loans and leases 1,219 1,498
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 9
Acquired Loans and Leases | Consumer and other, total
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 17 2
90 days or more 0 9
Current Loans 1,207 1,511
Total loans and leases 1,224 1,522
90 days and accruing 0 [1] 0 [1]
Nonaccrual 0 9
Acquired Loans and Leases | Finance Leases
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and leases 0 0
Acquired Loans and Leases | Covered Loans
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-89 days 0 1,014
90 days or more 2,416 4,272
Current Loans 23,452 32,314
Total loans and leases 25,868 37,600
90 days and accruing 2,416 [1] 4,272 [1]
Nonaccrual $ 0 $ 0
[1] Includes acquired loans that were recorded at fair value at the acquisition date.