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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, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018 | Jun. 30, 2019 | Dec. 31, 2018
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | $ 19,745 | $ 21,390 | $ 18,944 | $ 21,161 | $ 21,161 |  |
Charge-offs | (405) | (4,303) | (853) | (4,875) |  |  |
Recoveries | 166 | 196 | 322 | 288 |  |  |
Net recoveries (charge-offs) | (239) | (4,107) | (531) | (4,587) |  |  |
Provision | 150 | 2,362 | 1,243 | 3,071 |  |  |
Ending balance | 19,656 | 19,645 | 19,656 | 19,645 | 18,944 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | $ 4,464 | $ 2,189
Collectively evaluated for impairment |  |  |  |  |  | 15,192 | 16,755
Total ending allowance balance | 19,745 | 21,390 | 18,944 | 21,161 | 21,161 | 19,656 | 18,944
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 16,675 | 8,731
Loans collectively evaluated for impairment |  |  |  |  |  | 1,275,748 | 1,306,878
Total recorded investment in loans |  |  |  |  |  | 1,292,423 | 1,315,609
Commercial and Agricultural |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 5,429 | 7,003 | 5,383 | 6,976 | 6,976 |  |
Charge-offs | (48) | (3,624) | (55) | (3,644) |  |  |
Recoveries | 4 | 11 | 15 | 21 |  |  |
Net recoveries (charge-offs) | (44) | (3,613) | (40) | (3,623) |  |  |
Provision | 91 | 1,579 | 133 | 1,616 |  |  |
Ending balance | 5,476 | 4,969 | 5,476 | 4,969 | 5,383 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 1,726 | 1,743
Collectively evaluated for impairment |  |  |  |  |  | 3,750 | 3,640
Total ending allowance balance | 5,429 | 7,003 | 5,383 | 6,976 | 6,976 | 5,476 | 5,383
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 2,074 | 2,128
Loans collectively evaluated for impairment |  |  |  |  |  | 205,395 | 201,284
Total recorded investment in loans |  |  |  |  |  | 207,469 | 203,412
Commercial Mortgages |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 9,474 | 8,640 | 8,184 | 8,514 | 8,514 |  |
Charge-offs | 0 | (145) | 0 | (145) |  |  |
Recoveries | 1 | 1 | 2 | 2 |  |  |
Net recoveries (charge-offs) | 1 | (144) | 2 | (143) |  |  |
Provision | 70 | 244 | 1,359 | 369 |  |  |
Ending balance | 9,545 | 8,740 | 9,545 | 8,740 | 8,184 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 2,738 | 446
Collectively evaluated for impairment |  |  |  |  |  | 6,807 | 7,738
Total ending allowance balance | 9,474 | 8,640 | 8,184 | 8,514 | 8,514 | 9,545 | 8,184
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 14,056 | 6,146
Loans collectively evaluated for impairment |  |  |  |  |  | 636,546 | 656,842
Total recorded investment in loans |  |  |  |  |  | 650,602 | 662,988
Residential mortgages |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 1,215 | 1,407 | 1,226 | 1,316 | 1,316 |  |
Charge-offs | (39) | (71) | (41) | (165) |  |  |
Recoveries | 45 | 0 | 45 | 5 |  |  |
Net recoveries (charge-offs) | 6 | (71) | 4 | (160) |  |  |
Provision | 8 | 109 | (1) | 289 |  |  |
Ending balance | 1,229 | 1,445 | 1,229 | 1,445 | 1,226 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  | 1,229 | 1,226
Total ending allowance balance | 1,215 | 1,407 | 1,226 | 1,316 | 1,316 | 1,229 | 1,226
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 385 | 402
Loans collectively evaluated for impairment |  |  |  |  |  | 183,962 | 182,823
Total recorded investment in loans |  |  |  |  |  | 184,347 | 183,225
Consumer Loans |  |  |  |  |  |  |
Allowance for loan losses, by portfolio segment [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 3,627 | 4,340 | 4,151 | 4,355 | 4,355 |  |
Charge-offs | (318) | (463) | (757) | (921) |  |  |
Recoveries | 116 | 184 | 260 | 260 |  |  |
Net recoveries (charge-offs) | (202) | (279) | (497) | (661) |  |  |
Provision | (19) | 430 | (248) | 797 |  |  |
Ending balance | 3,406 | 4,491 | 3,406 | 4,491 | 4,151 |  |
Ending allowance balance attributable to loans [Abstract] |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  | 3,406 | 4,151
Total ending allowance balance | $ 3,627 | $ 4,340 | $ 4,151 | $ 4,355 | $ 4,355 | 3,406 | 4,151
Loans [Abstract] |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 160 | 55
Loans collectively evaluated for impairment |  |  |  |  |  | 249,845 | 265,929
Total recorded investment in loans |  |  |  |  |  | $ 250,005 | $ 265,984

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