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LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | $ 12,629 | $ 17,324
Loans Past Due 90 Days or More and Still Accruing | 14 | 29
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 14,673 | 14,076
Loans Not Past Due | 1,309,849 | 1,300,714
Total recorded investment in loans | 1,324,522 | 1,315,582
30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 11,087 | 7,639
60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,032 | 2,605
90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,554 | 3,832
Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 792
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 792
Commercial and agricultural |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 192,958 | 199,576
Commercial and agricultural | Loans acquired with deteriorated credit quality |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans |  | 0
Commercial Mortgages |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 667,575 | 646,174
Commercial Mortgages | Loans acquired with deteriorated credit quality |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans |  | 792
Commercial Mortgages | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 115 | 135
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Loans Not Past Due | 50,504 | 45,688
Total recorded investment in loans | 50,504 | 45,688
Commercial Mortgages | Construction | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages | Construction | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages | Construction | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages | Construction | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Commercial Mortgages | Commercial mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 5,849 | 6,520
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,598 | 3,262
Loans Not Past Due | 614,473 | 596,432
Total recorded investment in loans | 617,071 | 600,486
Commercial Mortgages | Commercial mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,137 | 2,399
Commercial Mortgages | Commercial mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 25 | 115
Commercial Mortgages | Commercial mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 436 | 748
Commercial Mortgages | Commercial mortgages | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 792
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 792
Residential mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 2,654 | 3,160
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,780 | 3,812
Loans Not Past Due | 186,381 | 191,125
Total recorded investment in loans | 189,161 | 194,937
Residential mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,324 | 1,399
Residential mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 510 | 939
Residential mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 946 | 1,474
Residential mortgages | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Consumer Loans |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 274,828 | 274,895
Consumer Loans | Loans acquired with deteriorated credit quality |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans |  | 0
Consumer Loans | Credit cards |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans Past Due 90 Days or More and Still Accruing | 14 | 24
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 23 | 50
Loans Not Past Due | 1,370 | 1,466
Total recorded investment in loans | 1,393 | 1,516
Consumer Loans | Credit cards | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 5 | 17
Consumer Loans | Credit cards | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4 | 9
Consumer Loans | Credit cards | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 14 | 24
Consumer Loans | Credit cards | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Consumer Loans | Home equity lines and loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 1,289 | 1,310
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,171 | 1,279
Loans Not Past Due | 97,366 | 99,599
Total recorded investment in loans | 98,537 | 100,878
Consumer Loans | Home equity lines and loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 244 | 265
Consumer Loans | Home equity lines and loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 111 | 31
Consumer Loans | Home equity lines and loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 816 | 983
Consumer Loans | Home equity lines and loans | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Consumer Loans | Indirect consumer loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 616 | 935
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,969 | 2,887
Loans Not Past Due | 155,557 | 150,645
Total recorded investment in loans | 157,526 | 153,532
Consumer Loans | Indirect consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,424 | 1,822
Consumer Loans | Indirect consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 240 | 484
Consumer Loans | Indirect consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 305 | 581
Consumer Loans | Indirect consumer loans | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Consumer Loans | Direct consumer loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 31 | 14
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 103 | 78
Loans Not Past Due | 17,269 | 18,891
Total recorded investment in loans | 17,372 | 18,969
Consumer Loans | Direct consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 59 | 48
Consumer Loans | Direct consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 21 | 28
Consumer Loans | Direct consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 23 | 2
Consumer Loans | Direct consumer loans | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Commercial and industrial | Commercial and agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 2,075 | 5,250
Loans Past Due 90 Days or More and Still Accruing | 0 | 5
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6,029 | 2,708
Loans Not Past Due | 186,641 | 196,322
Total recorded investment in loans | 192,670 | 199,030
Commercial and industrial | Commercial and agricultural | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 5,894 | 1,689
Commercial and industrial | Commercial and agricultural | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 121 | 999
Commercial and industrial | Commercial and agricultural | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 14 | 20
Commercial and industrial | Commercial and agricultural | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 0
Agricultural | Commercial and agricultural |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Loans Not Past Due | 288 | 546
Total recorded investment in loans | 288 | 546
Agricultural | Commercial and agricultural | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural | Commercial and agricultural | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural | Commercial and agricultural | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural | Commercial and agricultural | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | $ 0 | $ 0

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