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LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | $ 15,726 | $ 18,008
Loans Past Due 90 Days or More and Still Accruing | 0 | 7
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 22,415 | 14,370
Loans Not Past Due | 1,521,113 | 1,298,533
Total ending loans balance | 1,543,528 | 1,312,903
30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 15,081 | 4,672
60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 679 | 1,668
90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6,655 | 8,029
Commercial and agricultural: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 406,013 | 230,922
Commercial mortgages: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 692,935 | 650,570
Commercial mortgages: | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 63 | 80
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 | 54,523 | 44,082
Total ending loans balance | 54,523 | 44,082
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: | Commercial mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 6,027 | 8,407
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 13,217 | 2,883
Loans Not Past Due | 625,195 | 603,605
Total ending loans balance | 638,412 | 606,488
Commercial mortgages: | Commercial mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 11,077 | 440
Commercial mortgages: | Commercial mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 262 | 277
Commercial mortgages: | Commercial mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,878 | 2,165
Residential mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 1,742 | 2,155
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,074 | 2,775
Loans Not Past Due | 226,910 | 186,099
Total ending loans balance | 227,984 | 188,874
Residential mortgages | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 631 | 1,016
Residential mortgages | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 9 | 803
Residential mortgages | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 434 | 956
Consumer loans: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 216,596 | 242,537
Consumer loans: | Home equity lines and loans |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 1,017 | 641
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 346 | 653
Loans Not Past Due | 81,424 | 91,412
Total ending loans balance | 81,770 | 92,065
Consumer loans: | Home equity lines and loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 169 | 353
Consumer loans: | Home equity lines and loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 30 | 151
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 | 147 | 149
Consumer loans: | Indirect consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 604 | 571
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,156 | 2,278
Loans Not Past Due | 120,564 | 133,088
Total ending loans balance | 121,720 | 135,366
Consumer loans: | Indirect consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 753 | 1,546
Consumer loans: | Indirect consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 190 | 377
Consumer loans: | Indirect consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 213 | 355
Consumer loans: | Direct consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 1 | 7
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 206 | 49
Loans Not Past Due | 12,900 | 15,057
Total ending loans balance | 13,106 | 15,106
Consumer loans: | Direct consumer loans | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 18 | 32
Consumer loans: | Direct consumer loans | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 187 | 11
Consumer loans: | Direct consumer loans | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1 | 6
Commercial and industrial | Commercial and agricultural: |  |
Financing Receivable, Past Due [Line Items] |  |
Non-accrual | 6,272 | 6,147
Loans Past Due 90 Days or More and Still Accruing | 0 | 7
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6,416 | 5,732
Loans Not Past Due | 398,913 | 224,916
Total ending loans balance | 405,329 | 230,648
Commercial and industrial | Commercial and agricultural: | 30 - 59 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,433 | 1,285
Commercial and industrial | Commercial and agricultural: | 60 - 89 Days Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1 | 49
Commercial and industrial | Commercial and agricultural: | 90 Days or More Past Due |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 3,982 | 4,398
Agricultural | Commercial and agricultural: |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Loans Not Past Due | 684 | 274
Total ending loans balance | 684 | 274
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

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