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Loans and Leases - Schedule of Age Analysis of Past Due Loans, Segregated by Originated and Acquired Loan and Lease Portfolios and by Class of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total | $ 4,860,898 | $ 4,837,735
Less: unearned income and deferred costs and fees, Past due | (3,825) | (3,796)
Total loans and leases, net of unearned income and deferred costs and fees | 4,857,073 | 4,833,939
Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 4,617,920 | 4,556,048
Total | 4,632,441 | 4,572,537
90 days and accruing | 0 | 0
Nonaccrual | 21,404 | 19,340
Less: unearned income and deferred costs and fees, Past due | (3,825) | (3,796)
Less: unearned income and deferred costs and fees, Current Loans | (3,825) | (3,796)
Less: unearned income and deferred costs and fees, 90 days and accruing | 0 | 0
Less: unearned income and deferred costs and fees, Nonaccrual | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 4,628,616 | 4,568,741
Total originated loans and leases, net of unearned income and deferred costs and fees, Current Loans | 4,614,095 | 4,552,252
Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 3,287 | 7,838
Less: unearned income and deferred costs and fees, Past due | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 3,287 | 7,838
Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 11,234 | 8,651
Less: unearned income and deferred costs and fees, Past due | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 11,234 | 8,651
Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 226,107 | 262,510
Total | 228,457 | 265,198
90 days and accruing | 1,219 | 1,316
Nonaccrual | 2,164 | 2,856
Less: unearned income and deferred costs and fees, Past due | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 228,457 | 265,198
Acquired Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 232 | 67
Acquired Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 2,118 | 2,621
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 994,505 | 1,077,635
Commercial and industrial | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 94,302 | 107,494
Commercial and industrial | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 900,203 | 970,141
Commercial and industrial | Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 953,497 | 1,029,897
Total | 954,734 | 1,033,923
90 days and accruing | 0 | 0
Nonaccrual | 1,707 | 1,861
Commercial and industrial | Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 200 | 2,367
Commercial and industrial | Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,037 | 1,659
Commercial and industrial | Originated Loans and Leases | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 94,302 | 107,494
Total | 94,302 | 107,494
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial and industrial | Originated Loans and Leases | Agriculture | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial and industrial | Originated Loans and Leases | Agriculture | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial and industrial | Originated Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 859,195 | 922,403
Total | 860,432 | 926,429
90 days and accruing | 0 | 0
Nonaccrual | 1,707 | 1,861
Commercial and industrial | Originated Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 200 | 2,367
Commercial and industrial | Originated Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,037 | 1,659
Commercial and industrial | Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 39,769 | 43,702
Total | 39,771 | 43,712
90 days and accruing | 2 | 10
Nonaccrual | 45 | 22
Commercial and industrial | Acquired Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial and industrial | Acquired Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 2 | 10
Commercial and industrial | Acquired Loans and Leases | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Commercial and industrial | Acquired Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 39,769 | 43,702
Total | 39,771 | 43,712
90 days and accruing | 2 | 10
Nonaccrual | 45 | 22
Commercial and industrial | Acquired Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial and industrial | Acquired Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 2 | 10
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,426,770 | 2,340,661
Commercial real estate | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 180,593 | 170,229
Commercial real estate | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 192,015 | 165,669
Commercial real estate | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,054,162 | 2,004,763
Commercial real estate | Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 2,268,920 | 2,158,441
Total | 2,273,981 | 2,161,569
90 days and accruing | 0 | 0
Nonaccrual | 10,329 | 7,691
Commercial real estate | Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 426 | 1,272
Commercial real estate | Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 4,635 | 1,856
Commercial real estate | Originated Loans and Leases | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 180,169 | 169,934
Total | 180,385 | 170,005
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial real estate | Originated Loans and Leases | Agriculture | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 216 | 71
Commercial real estate | Originated Loans and Leases | Agriculture | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Originated Loans and Leases | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 190,447 | 164,285
Total | 190,657 | 164,285
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial real estate | Originated Loans and Leases | Construction | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 210 | 0
Commercial real estate | Originated Loans and Leases | Construction | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Originated Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,898,304 | 1,824,222
Total | 1,902,939 | 1,827,279
90 days and accruing | 0 | 0
Nonaccrual | 10,329 | 7,691
Commercial real estate | Originated Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 1,201
Commercial real estate | Originated Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 4,635 | 1,856
Commercial real estate | Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 152,069 | 178,253
Total | 152,789 | 179,092
90 days and accruing | 564 | 525
Nonaccrual | 289 | 316
Commercial real estate | Acquired Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 720 | 839
Commercial real estate | Acquired Loans and Leases | Agriculture |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 208 | 224
Total | 208 | 224
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial real estate | Acquired Loans and Leases | Agriculture | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | Agriculture | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,358 | 1,384
Total | 1,358 | 1,384
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial real estate | Acquired Loans and Leases | Construction | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | Construction | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 150,503 | 176,645
Total | 151,223 | 177,484
90 days and accruing | 564 | 525
Nonaccrual | 289 | 316
Commercial real estate | Acquired Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Commercial real estate | Acquired Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 720 | 839
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,347,320 | 1,333,894
Residential real estate | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 221,538 | 229,608
Residential real estate | Mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,125,782 | 1,104,286
Residential real estate | Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,304,468 | 1,283,529
Total | 1,312,197 | 1,292,261
90 days and accruing | 0 | 0
Nonaccrual | 9,119 | 9,554
Residential real estate | Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 2,339 | 3,679
Residential real estate | Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 5,390 | 5,053
Residential real estate | Originated Loans and Leases | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 203,099 | 206,447
Total | 205,050 | 208,459
90 days and accruing | 0 | 0
Nonaccrual | 1,859 | 1,784
Residential real estate | Originated Loans and Leases | Home equity | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 725 | 986
Residential real estate | Originated Loans and Leases | Home equity | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,226 | 1,026
Residential real estate | Originated Loans and Leases | Mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,101,369 | 1,077,082
Total | 1,107,147 | 1,083,802
90 days and accruing | 0 | 0
Nonaccrual | 7,260 | 7,770
Residential real estate | Originated Loans and Leases | Mortgages | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,614 | 2,693
Residential real estate | Originated Loans and Leases | Mortgages | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 4,164 | 4,027
Residential real estate | Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 33,495 | 39,797
Total | 35,123 | 41,633
90 days and accruing | 653 | 781
Nonaccrual | 1,830 | 2,518
Residential real estate | Acquired Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 232 | 64
Residential real estate | Acquired Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,396 | 1,772
Residential real estate | Acquired Loans and Leases | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 16,005 | 20,300
Total | 16,488 | 21,149
90 days and accruing | 57 | 59
Nonaccrual | 923 | 1,414
Residential real estate | Acquired Loans and Leases | Home equity | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 212 | 46
Residential real estate | Acquired Loans and Leases | Home equity | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 271 | 803
Residential real estate | Acquired Loans and Leases | Mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 17,490 | 19,497
Total | 18,635 | 20,484
90 days and accruing | 596 | 722
Nonaccrual | 907 | 1,104
Residential real estate | Acquired Loans and Leases | Mortgages | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 20 | 18
Residential real estate | Acquired Loans and Leases | Mortgages | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 1,125 | 969
Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 75,174 | 70,989
Consumer and other | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 61,563 | 58,326
Consumer and other | Indirect |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 13,611 | 12,663
Consumer and other | Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 73,906 | 69,625
Total | 74,400 | 70,228
90 days and accruing | 0 | 0
Nonaccrual | 249 | 234
Consumer and other | Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 322 | 520
Consumer and other | Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 172 | 83
Consumer and other | Originated Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 60,613 | 57,354
Total | 60,789 | 57,565
90 days and accruing | 0 | 0
Nonaccrual | 104 | 79
Consumer and other | Originated Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 100 | 187
Consumer and other | Originated Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 76 | 24
Consumer and other | Originated Loans and Leases | Indirect |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 13,293 | 12,271
Total | 13,611 | 12,663
90 days and accruing | 0 | 0
Nonaccrual | 145 | 155
Consumer and other | Originated Loans and Leases | Indirect | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 222 | 333
Consumer and other | Originated Loans and Leases | Indirect | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 96 | 59
Consumer and other | Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 774 | 758
Total | 774 | 761
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Consumer and other | Acquired Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 3
Consumer and other | Acquired Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Consumer and other | Acquired Loans and Leases | Consumer Other |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 774 | 758
Total | 774 | 761
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Consumer and other | Acquired Loans and Leases | Consumer Other | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 3
Consumer and other | Acquired Loans and Leases | Consumer Other | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Consumer and other | Acquired Loans and Leases | Indirect |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 17,129 | 14,556
Leases | Originated Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 17,129 | 14,556
Total | 17,129 | 14,556
90 days and accruing | 0 | 0
Nonaccrual | 0 | 0
Leases | Originated Loans and Leases | 30-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Leases | Originated Loans and Leases | 90 days or more |  |
Financing Receivable, Past Due [Line Items] |  |
Past due | 0 | 0
Leases | Acquired Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 0 | $ 0

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