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DERIVATIVES - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Derivative [Line Items] |  |  |
Net interest income (expense) | $ 34,375,000 | $ 43,978,000 |
Accrued interest receivable | 32,672,000 |  | $ 30,676,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | 310,000,000 |  | 310,000,000
Unrealized gain | 9,686,000 |  | 6,814,000
Net interest income (expense) | 1,500,000 | $ 947,000 |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | 310,000,000 |  | 310,000,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | 520,222,000 |  | 545,983,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member] |  |  |
Derivative [Line Items] |  |  |
Accrued interest receivable | 1,300,000 |  | 1,300,000
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] |  |  |
Derivative [Line Items] |  |  |
Accrued interest payable | $ 1,400,000 |  | $ 1,400,000

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