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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loan Balances and Allowance for Loan Losses for Each Impairment Method (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | $ 19,358 |  |  |
Loans receivable: Collectively Evaluated |  |  | 1,720,682 |  |  |
Loans receivable | $ 1,814,510 |  | 1,740,040 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 453 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 15,162 |  |  |
Allowance for loan losses | 19,056 | $ 18,346 | 16,615 | $ 14,547 | $ 14,271 | $ 13,537
Commercial |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 18,754 |  |  |
Loans receivable: Collectively Evaluated |  |  | 1,092,744 |  |  |
Loans receivable |  |  | 1,111,498 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 453 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 10,845 |  |  |
Allowance for loan losses |  |  | 11,298 | 8,894 | 8,922 | 8,293
Commercial | Real estate loan |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 7,154 |  |  |
Loans receivable: Collectively Evaluated |  |  | 675,095 |  |  |
Loans receivable |  |  | 682,249 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 427 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 6,647 |  |  |
Allowance for loan losses |  |  | 7,074 | 4,982 | 5,017 | 4,405
Commercial | Commercial and industrial |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 11,223 |  |  |
Loans receivable: Collectively Evaluated |  |  | 167,048 |  |  |
Loans receivable |  |  | 178,271 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 26 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 2,883 |  |  |
Allowance for loan losses |  |  | 2,909 | 2,792 | 2,841 | 2,723
Commercial | Paycheck Protection Program - 1st Draw |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 5 |  |  |
Loans receivable |  |  | 5 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 0 |  |  |
Allowance for loan losses |  |  | 0 |  |  |
Commercial | Paycheck Protection Program - 2nd Draw |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 163 |  |  |
Loans receivable |  |  | 163 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 0 |  |  |
Allowance for loan losses |  |  | 0 |  |  |
Commercial | Political subdivisions |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 90,719 |  |  |
Loans receivable |  |  | 90,719 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 0 |  |  |
Allowance for loan losses |  |  | 0 |  |  |
Commercial | Commercial Construction And Land |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 244 |  |  |
Loans receivable: Collectively Evaluated |  |  | 73,719 |  |  |
Loans receivable |  |  | 73,963 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 647 |  |  |
Allowance for loan losses |  |  | 647 | 515 | 391 | 637
Commercial | Loans secured by farm land |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 76 |  |  |
Loans receivable: Collectively Evaluated |  |  | 12,874 |  |  |
Loans receivable |  |  | 12,950 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 112 |  |  |
Allowance for loan losses |  |  | 112 | 112 | 129 | 115
Commercial | Multi-family (5 or more) residential |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 55,886 |  |  |
Loans receivable |  |  | 55,886 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 411 |  |  |
Allowance for loan losses |  |  | 411 | 339 | 367 | 215
Commercial | Agricultural loans |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 57 |  |  |
Loans receivable: Collectively Evaluated |  |  | 2,378 |  |  |
Loans receivable |  |  | 2,435 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 21 |  |  |
Allowance for loan losses |  |  | 21 | 23 | 27 | 25
Commercial | Other commercial loans |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 14,857 |  |  |
Loans receivable | 392,684 |  | 14,857 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 124 |  |  |
Allowance for loan losses |  |  | 124 | 131 | 150 | 173
Residential mortgage |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 604 |  |  |
Loans receivable: Collectively Evaluated |  |  | 608,502 |  |  |
Loans receivable | 404,233 |  | 609,106 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 4,073 |  |  |
Allowance for loan losses |  |  | 4,073 | 4,392 | 4,445 | 4,338
Residential mortgage | Real estate loan | first liens |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 506 |  |  |
Loans receivable: Collectively Evaluated |  |  | 509,276 |  |  |
Loans receivable |  |  | 509,782 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 3,413 |  |  |
Allowance for loan losses |  |  | 3,413 | 3,689 | 3,810 | 3,650
Residential mortgage | Real estate loan | junior liens |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 30 |  |  |
Loans receivable: Collectively Evaluated |  |  | 24,919 |  |  |
Loans receivable |  |  | 24,949 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 167 |  |  |
Allowance for loan losses |  |  | 167 | 180 | 181 | 184
Residential mortgage | Home equity lines of credit |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 68 |  |  |
Loans receivable: Collectively Evaluated |  |  | 43,730 |  |  |
Loans receivable |  |  | 43,798 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 282 |  |  |
Allowance for loan losses |  |  | 282 | 308 | 306 | 302
Residential mortgage | 1-4 Family residential construction |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 30,577 |  |  |
Loans receivable |  |  | 30,577 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 211 |  |  |
Allowance for loan losses |  |  | 211 | 215 | 148 | 202
Consumer |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Loans receivable: Individually Evaluated |  |  | 0 |  |  |
Loans receivable: Collectively Evaluated |  |  | 19,436 |  |  |
Loans receivable | 56,009 |  | 19,436 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 |  |  | 0 |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1 |  |  | 244 |  |  |
Allowance for loan losses |  |  | 244 | 261 | 237 | 235
Unallocated |  |  |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Allowance for loan losses | $ 0 | $ 0 | $ 1,000 | $ 1,000 | $ 667 | $ 671

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