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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded commitments | $ 22,436 | $ 22,679 | $ 22,908 | $ 17,939
Interest income, nonaccrual loans, payoffs | 600 | 10 |  |
Outstanding commitments | 0 |  |  |
Remaining borrowing capacity | $ 459 |  |  |
Commercial Loan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income discontinued over delinquent days | 90 days |  |  |
Closed End Consumer Loan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income discontinued over delinquent days | 120 days |  |  |
Real Estate and Open Ended Consumer Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income discontinued over delinquent days | 180 days |  |  |
Unfunded Commitment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded commitments | $ 975 |  | 1,250 | 0
Commercial/Agricultural Real Estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded commitments | $ 18,255 | $ 18,496 | $ 18,784 | $ 14,085
Commercial/Agricultural Real Estate | Agricultural real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan-to-value ratio (as a percent) | 75.00% |  |  |

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