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OFF-BALANCE SHEET COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Amortization | $ 185 | $ 198 | $ 558 | $ 593 |
Capital Contributions, Small Business Investment Corporation |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Capital contributions |  |  | 20,000 |  | $ 17,000
Small Business Investment Corporations |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Capital contributions |  |  | 5,500 |  | 5,500
Capital Contributions, Low Income Housing Partnerships |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Capital contributions |  |  | 4,000 |  | 4,500
Low Income Housing Partnerships |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Capital contributions |  |  | $ 796 |  | $ 1,000

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