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DERIVATIVES - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net interest income (expense) | $ 36,675,000 | $ 36,515,000 | $ 38,921,000 | $ 43,978,000 | $ 48,040,000 | $ 45,525,000 | $ 42,893,000 | $ 39,622,000 | $ 156,089,000 | $ 176,080,000 | $ 138,061,000
Accrued interest receivable | 30,676,000 |  |  |  | 25,157,000 |  |  |  | 30,676,000 | 25,157,000 |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount | 310,000,000 |  |  |  | 290,000,000 |  |  |  | 310,000,000 | 290,000,000 |
Net interest income (expense) |  |  |  |  |  |  |  |  | 5,000,000 | (851,000) |
Unrealized after-tax gain of accumulated other comprehensive income (loss) |  |  |  |  | 167,000 |  |  |  |  |  |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount | 310,000,000 |  |  |  | 290,000,000 |  |  |  | 310,000,000 | 290,000,000 |
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount | 545,983,000 |  |  |  | 612,211,000 |  |  |  | 545,983,000 | 612,211,000 |
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accrued interest payable | 1,100,000 |  |  |  | 1,100,000 |  |  |  | 1,100,000 | 1,100,000 |
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accrued interest receivable | $ 1,400,000 |  |  |  | $ 1,400,000 |  |  |  | $ 1,400,000 | $ 1,400,000 |

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