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OFF-BALANCE SHEET COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |
Amortization | $ 178 | $ 186 |
Capital Contributions, Small Business Investment Corporation |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |
Capital contributions | 22,200 | 21,700 |
Small Business Investment Corporations |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |
Capital contributions | 6,300 | $ 6,800 |
Capital Contributions, Low Income Housing Partnerships |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |
Capital contributions | 3,600 |  | $ 3,800
Low Income Housing Partnerships |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |
Capital contributions | $ 529 |  | $ 796

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