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LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | $ 23,468 | $ 12,254
Loans Past Due 90 Days or More and Still Accruing | 53 | 19
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 13,659 | 14,367
Loans Not Past Due | 1,296,661 | 1,301,242
Total recorded investment in loans | 1,310,320 | 1,315,609
30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 7,598 | 10,688
60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,659 | 1,207
90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4,402 | 2,472
Commercial and agricultural |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 227,725 | 203,412
Commercial Mortgages |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 653,405 | 662,988
Commercial Mortgages | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 87 | 109
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 279 | 0
Loans Not Past Due | 48,490 | 54,626
Total recorded investment in loans | 48,769 | 54,626
Commercial Mortgages | Construction | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 279 | 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 | Commercial mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 13,250 | 5,529
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4,571 | 6,600
Loans Not Past Due | 600,065 | 601,762
Total recorded investment in loans | 604,636 | 608,362
Commercial Mortgages | Commercial mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,176 | 6,273
Commercial Mortgages | Commercial mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 402 | 158
Commercial Mortgages | Commercial mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,993 | 169
Residential mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 2,455 | 2,655
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 3,838 | 3,746
Loans Not Past Due | 180,731 | 179,479
Total recorded investment in loans | 184,569 | 183,225
Residential mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,906 | 2,204
Residential mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 674 | 516
Residential mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,258 | 1,026
Consumer Loans |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total recorded investment in loans | 244,621 | 265,984
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 | 0 | 9
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due |  | 13
Loans Not Past Due |  | 1,437
Total recorded investment in loans |  | 1,450
Consumer Loans | Credit cards | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due |  | 1
Consumer Loans | Credit cards | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due |  | 3
Consumer Loans | Credit cards | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due |  | 9
Consumer Loans | Home equity lines and loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 722 | 1,183
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 547 | 1,106
Loans Not Past Due | 92,205 | 97,360
Total recorded investment in loans | 92,752 | 98,466
Consumer Loans | Home equity lines and loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 36 | 279
Consumer Loans | Home equity lines and loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 15 | 97
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 | 496 | 730
Consumer Loans | Indirect consumer loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 613 | 693
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,010 | 2,266
Loans Not Past Due | 134,830 | 147,540
Total recorded investment in loans | 136,840 | 149,806
Consumer Loans | Indirect consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,356 | 1,511
Consumer Loans | Indirect consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 305 | 319
Consumer Loans | Indirect consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 349 | 436
Consumer Loans | Direct consumer loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 6 | 37
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 81 | 204
Loans Not Past Due | 14,948 | 16,058
Total recorded investment in loans | 15,029 | 16,262
Consumer Loans | Direct consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 63 | 120
Consumer Loans | Direct consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 14 | 53
Consumer Loans | Direct consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4 | 31
Commercial and industrial | Commercial and agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 6,335 | 2,048
Loans Past Due 90 Days or More and Still Accruing | 53 | 10
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,333 | 416
Loans Not Past Due | 225,177 | 202,667
Total recorded investment in loans | 227,510 | 203,083
Commercial and industrial | Commercial and agricultural | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,782 | 284
Commercial and industrial | Commercial and agricultural | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 249 | 61
Commercial and industrial | Commercial and agricultural | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 302 | 71
Agricultural | Commercial and agricultural |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 16
Loans Not Past Due | 215 | 313
Total recorded investment in loans | 215 | 329
Agricultural | Commercial and agricultural | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 16
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

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