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Loans and Leases - Schedule of Loans and Leases (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | $ 4,806,306 | $ 4,672,909
Less: unearned income and deferred costs and fees | (3,597) | (3,789)
Total loans and leases, net of unearned income and deferred costs and fees | 4,802,709 | 4,669,120
Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 4,534,838 | 4,362,332
Less: unearned income and deferred costs and fees | (3,597) | (3,789)
Total loans and leases, net of unearned income and deferred costs and fees | 4,531,241 | 4,358,543
Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 271,468 | 310,577
Less: unearned income and deferred costs and fees | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 271,468 | 310,577
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,065,385 | 1,091,651
Commercial and industrial | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 93,228 | 108,608
Commercial and industrial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 972,157 | 983,043
Commercial and industrial | Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,021,094 | 1,040,675
Commercial and industrial | Originated | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 93,228 | 108,608
Commercial and industrial | Originated | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 927,866 | 932,067
Commercial and industrial | Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 44,291 | 50,976
Commercial and industrial | Acquired | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 0 | 0
Commercial and industrial | Acquired | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 44,291 | 50,976
Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 2,321,158 | 2,200,727
Commercial real estate | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 147,813 | 129,959
Commercial real estate | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,992,852 | 1,866,802
Commercial real estate | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 180,493 | 203,966
Commercial real estate | Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 2,138,013 | 1,992,980
Commercial real estate | Originated | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 147,582 | 129,712
Commercial real estate | Originated | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,811,348 | 1,660,782
Commercial real estate | Originated | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 179,083 | 202,486
Commercial real estate | Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 183,145 | 207,747
Commercial real estate | Acquired | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 231 | 247
Commercial real estate | Acquired | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 181,504 | 206,020
Commercial real estate | Acquired | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,410 | 1,480
Residential real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,338,406 | 1,302,941
Residential real estate | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 231,601 | 241,256
Residential real estate | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,106,805 | 1,061,685
Residential real estate | Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,295,233 | 1,251,852
Residential real estate | Originated | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 209,168 | 212,812
Residential real estate | Originated | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 1,086,065 | 1,039,040
Residential real estate | Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 43,173 | 51,089
Residential real estate | Acquired | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 22,433 | 28,444
Residential real estate | Acquired | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 20,740 | 22,645
Consumer and other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 67,302 | 63,123
Consumer and other | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 55,339 | 50,979
Consumer and other | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 11,963 | 12,144
Consumer and other | Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 66,443 | 62,358
Consumer and other | Originated | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 54,480 | 50,214
Consumer and other | Originated | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 11,963 | 12,144
Consumer and other | Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 859 | 765
Consumer and other | Acquired | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 859 | 765
Consumer and other | Acquired | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 0 | 0
Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 14,055 | 14,467
Leases | Originated |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | 14,055 | 14,467
Leases | Acquired |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases | $ 0 | $ 0

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