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INVESTMENT SECURITIES - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Proceeds from sale of available-for-sale investment securities | $ 0 | $ 0 | $ 115,247,000 | $ 0
Gain on sale of available-for-sale investment securities |  |  | 1,052,000 | $ 0
Guaranteed mortgage-backed securities | Floating interest rate |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Proceeds from sale of available-for-sale investment securities |  |  | 115,200,000 |
Gain on sale of available-for-sale investment securities |  |  | $ 1,100,000 |
Investment securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Average percent of amortized cost for securities in unrealized loss positions for more than 12 months | 95.50% |  | 95.50% |

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