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DERIVATIVES AND HEDGING ACTIVITIES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Derivative [Line Items] |  |  |  |  |
Liability for cash collateral received from counterparties | $ 7,400 |  | $ 7,400 |  | $ 10,100
Receivable for cash collateral paid to counterparties | 177 |  | 177 |  | 218
Notional amount of open interest rate swap agreements | 432,825 |  | 432,825 |  | 366,320
Interest income, securities, US treasury | 300 | $ 300 | 900 | $ 1,100 |
Interest rate swaps, back-to-back |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional amount of open interest rate swap agreements | $ 225,000 |  | $ 225,000 |  | $ 236,000

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