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DERIVATIVE FINANCIAL INSTRUMENTS - Interest Rate Swaps Recorded in Noninterest Expense (Details) - Interest Rate Swap - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative Financial Instruments |  |  |
Net change in fair value of interest rate swaps | $ 0 | $ 0 | $ 0
Non-interest expense |  |  |
Derivative Financial Instruments |  |  |
Gain (loss) pay, floating receive fixed | (11,525) | 19,308 | (12,587)
Gain (loss) pay fixed receive floating | $ 11,525 | $ (19,308) | $ 12,587

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