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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2021 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |
TDR loans evaluated on individual | $ 100,000 |  |  |
Interest income |  | $ 0 | $ 0 |
Non-accrual loans for no related allowance amortized cost |  | 2,600,000 |  | $ 792,000
Minimum loan balance required for collateral-dependent loans |  | 100,000 |  |
Provision expense on its portfolio of outstanding loans |  | 500,000 | 1,500,000 |
Provision for loan losses |  | $ 500,000 | 1,500,000 |
Maximum percentage of concessions granted of their respective classes of loan portfolios |  | 2.00% |  |
Consumer | Principal forgiveness |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |
Loan paid during period |  | $ 14,000 | 4,000 |
Allowance for unfunded commitment |  |  |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |  |  |
Provision for loan losses |  | $ (130,000) | $ 826,000 |

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