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LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowances (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Jun. 30, 2020 | Dec. 31, 2019
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | $ 26,233 | $ 19,745 | $ 23,478 | $ 18,944 | $ 18,944 |  |
Charge-offs | (2,489) | (405) | (2,921) | (853) |  |  |
Recoveries | 126 | 166 | 263 | 322 |  |  |
Net recoveries (charge-offs) | (2,363) | (239) | (2,658) | (531) |  |  |
Provision | 260 | 150 | 3,310 | 1,243 |  |  |
Ending balance | 24,130 | 19,656 | 24,130 | 19,656 | 23,478 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | $ 5,706 | $ 8,097
Collectively evaluated for impairment |  |  |  |  |  | 18,424 | 15,381
Total ending allowance balance | 24,130 | 19,656 | 23,478 | 19,656 | 23,478 | 24,130 | 23,478
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 15,741 | 15,665
Loans collectively evaluated for impairment |  |  |  |  |  | 1,487,005 | 1,297,238
Total recorded investment in loans |  |  |  |  |  | 1,502,746 | 1,312,903
Commercial and Agricultural |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 11,191 | 5,429 | 10,227 | 5,383 | 5,383 |  |
Charge-offs | (36) | (48) | (65) | (55) |  |  |
Recoveries | 5 | 4 | 8 | 15 |  |  |
Net recoveries (charge-offs) | (31) | (44) | (57) | (40) |  |  |
Provision | (2,833) | 91 | (1,843) | 133 |  |  |
Ending balance | 8,327 | 5,476 | 8,327 | 5,476 | 10,227 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 5,431 | 6,000
Collectively evaluated for impairment |  |  |  |  |  | 2,896 | 4,227
Total ending allowance balance | 8,327 | 5,476 | 8,327 | 5,476 | 5,383 | 8,327 | 10,227
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 6,572 | 6,147
Loans collectively evaluated for impairment |  |  |  |  |  | 390,126 | 224,775
Total recorded investment in loans |  |  |  |  |  | 396,698 | 230,922
Commercial Mortgages |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 10,472 | 9,474 | 8,869 | 8,184 | 8,184 |  |
Charge-offs | (2,143) | 0 | (2,143) | 0 |  |  |
Recoveries | 0 | 1 | 0 | 2 |  |  |
Net recoveries (charge-offs) | (2,143) | 1 | (2,143) | 2 |  |  |
Provision | 2,220 | 70 | 3,823 | 1,359 |  |  |
Ending balance | 10,549 | 9,545 | 10,549 | 9,545 | 8,869 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 213 | 2,097
Collectively evaluated for impairment |  |  |  |  |  | 10,336 | 6,772
Total ending allowance balance | 10,549 | 9,545 | 8,869 | 8,184 | 8,184 | 10,549 | 8,869
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 7,162 | 8,844
Loans collectively evaluated for impairment |  |  |  |  |  | 665,378 | 641,726
Total recorded investment in loans |  |  |  |  |  | 672,540 | 650,570
Residential mortgages |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 1,421 | 1,215 | 1,252 | 1,226 | 1,226 |  |
Charge-offs | (13) | (39) | (13) | (41) |  |  |
Recoveries | 49 | 45 | 48 | 45 |  |  |
Net recoveries (charge-offs) | 36 | 6 | 35 | 4 |  |  |
Provision | 434 | 8 | 604 | (1) |  |  |
Ending balance | 1,891 | 1,229 | 1,891 | 1,229 | 1,252 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  | 1,891 | 1,252
Total ending allowance balance | 1,891 | 1,229 | 1,252 | 1,226 | 1,252 | 1,891 | 1,252
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 1,170 | 525
Loans collectively evaluated for impairment |  |  |  |  |  | 207,523 | 188,349
Total recorded investment in loans |  |  |  |  |  | 208,693 | 188,874
Consumer Loans |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 3,149 | 3,627 | 3,130 | 4,151 | 4,151 |  |
Charge-offs | (297) | (318) | (700) | (757) |  |  |
Recoveries | 72 | 116 | 207 | 260 |  |  |
Net recoveries (charge-offs) | (225) | (202) | (493) | (497) |  |  |
Provision | 439 | (19) | 726 | (248) |  |  |
Ending balance | 3,363 | 3,406 | 3,363 | 3,406 | 3,130 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 62 | 0
Collectively evaluated for impairment |  |  |  |  |  | 3,301 | 3,130
Total ending allowance balance | $ 3,363 | $ 3,406 | $ 3,130 | $ 4,151 | $ 3,130 | 3,363 | 3,130
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 837 | 149
Loans collectively evaluated for impairment |  |  |  |  |  | 223,978 | 242,388
Total recorded investment in loans |  |  |  |  |  | $ 224,815 | $ 242,537

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