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LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | $ 14,028 | $ 12,043
Loans Past Due 90 Days or More and Still Accruing | 21 | 13
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 14,800 | 17,873
Loans Not Past Due | 1,276,629 | 1,184,191
Total recorded investment in loans | 1,292,261 | 1,203,482
30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 7,979 | 4,969
60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,159 | 6,383
90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 5,662 | 6,521
Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 832 | 1,418
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 832 | 1,418
Commercial and agricultural: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 189,303 | 177,027
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 | 0
Commercial Mortgages |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 639,501 | 570,156
Commercial Mortgages | Loans acquired with deteriorated credit quality |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 832 | 1,323
Commercial Mortgages | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 159 | 19
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 | 1,177
Loans Not Past Due | 57,861 | 45,333
Total recorded investment in loans | 57,861 | 46,510
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 | 1,177
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 | 8,473 | 5,454
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6,790 | 7,524
Loans Not Past Due | 574,018 | 514,799
Total recorded investment in loans | 581,640 | 523,646
Commercial Mortgages | Commercial mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4,218 | 652
Commercial Mortgages | Commercial mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 4,460
Commercial Mortgages | Commercial mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,572 | 2,412
Commercial Mortgages | Commercial mortgages | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 832 | 1,323
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 832 | 1,323
Residential mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 3,210 | 4,201
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 3,531 | 4,919
Loans Not Past Due | 194,170 | 193,951
Total recorded investment in loans | 197,701 | 198,965
Residential mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,122 | 2,100
Residential mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 695 | 436
Residential mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,714 | 2,383
Residential mortgages | Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 95
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 95
Consumer loans: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 265,756 | 257,334
Consumer loans: | Loans acquired with deteriorated credit quality |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 0 | 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 | 19 | 11
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 27 | 23
Loans Not Past Due | 1,417 | 1,453
Total recorded investment in loans | 1,444 | 1,476
Consumer loans: | Credit cards | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6 | 3
Consumer loans: | Credit cards | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2 | 9
Consumer loans: | Credit cards | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 19 | 11
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 | 1,178 | 1,670
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,165 | 1,376
Loans Not Past Due | 97,598 | 97,477
Total recorded investment in loans | 98,763 | 98,853
Consumer loans: | Home equity lines and loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 220 | 227
Consumer loans: | Home equity lines and loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 99 | 0
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 | 846 | 1,149
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 | 837 | 654
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,910 | 2,602
Loans Not Past Due | 144,880 | 137,391
Total recorded investment in loans | 147,790 | 139,993
Consumer loans: | Indirect consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,084 | 1,773
Consumer loans: | Indirect consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 325 | 287
Consumer loans: | Indirect consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 501 | 542
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 | 21 | 45
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 141 | 83
Loans Not Past Due | 17,618 | 16,929
Total recorded investment in loans | 17,759 | 17,012
Consumer loans: | Direct consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 112 | 54
Consumer loans: | Direct consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 21 | 7
Consumer loans: | Direct consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 8 | 22
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 | 150 | 0
Loans Past Due 90 Days or More and Still Accruing | 2 | 2
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 236 | 169
Loans Not Past Due | 188,617 | 176,497
Total recorded investment in loans | 188,853 | 176,666
Commercial and industrial | Commercial and agricultural: | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 217 | 160
Commercial and industrial | Commercial and agricultural: | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 17 | 7
Commercial and industrial | Commercial and agricultural: | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2 | 2
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 | 450 | 361
Total recorded investment in loans | 450 | 361
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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