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LOANS - Summary of Total Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | $ 2,464,419 | $ 2,485,613
Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 1,471,016 | 1,452,630
Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 993,403 | 1,032,983
Total Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 824,721 | 826,746
Total Commercial Real Estate | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 543,166 | 534,011
Total Commercial Real Estate | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 281,555 | 292,735
Total Commercial Real Estate | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 45,873 | 45,673
Total Commercial Real Estate | Construction and land development | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 31,073 | 28,892
Total Commercial Real Estate | Construction and land development | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 14,800 | 16,781
Total Commercial Real Estate | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 778,848 | 781,073
Total Commercial Real Estate | Other commercial real estate | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 512,093 | 505,119
Total Commercial Real Estate | Other commercial real estate | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 266,755 | 275,954
Total Commercial and Industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 387,205 | 379,423
Total Commercial and Industrial | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 279,705 | 268,004
Total Commercial and Industrial | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 107,500 | 111,419
Total Commercial and Industrial | Other Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 275,502 | 266,120
Total Commercial and Industrial | Other Commercial | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 210,304 | 198,051
Total Commercial and Industrial | Other Commercial | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 65,198 | 68,069
Total Commercial and Industrial | Agricultural |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 26,309 | 27,588
Total Commercial and Industrial | Agricultural | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 26,309 | 27,588
Total Commercial and Industrial | Agricultural | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 0 | 0
Total Commercial and Industrial | Tax exempt |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 85,394 | 85,715
Total Commercial and Industrial | Tax exempt | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 43,092 | 42,365
Total Commercial and Industrial | Tax exempt | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 42,302 | 43,350
Total Commercial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 1,211,926 | 1,206,169
Total Commercial Loans | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 822,871 | 802,015
Total Commercial Loans | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 389,055 | 404,154
Total Residential Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 1,132,977 | 1,155,682
Total Residential Real Estate | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 588,465 | 591,411
Total Residential Real Estate | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 544,512 | 564,271
Total Residential Real Estate | Residential mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 1,132,977 | 1,155,682
Total Residential Real Estate | Residential mortgages | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 588,465 | 591,411
Total Residential Real Estate | Residential mortgages | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 544,512 | 564,271
Total Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 119,516 | 123,762
Total Consumer | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 59,680 | 59,204
Total Consumer | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 59,836 | 64,558
Total Consumer | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 109,866 | 113,593
Total Consumer | Home equity | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 52,100 | 51,376
Total Consumer | Home equity | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 57,766 | 62,217
Total Consumer | Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 9,650 | 10,169
Total Consumer | Other consumer | Business Activities Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | 7,580 | 7,828
Total Consumer | Other consumer | Acquired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans, gross | $ 2,070 | $ 2,341

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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