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LOANS HELD FOR SALE - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Receivable, Held-for-Sale [Abstract] |  |  |
Loans held for sale (including nonperforming loans) | $ 2,400 |  | $ 500
Investment securities held to maturity | 962,799 |  | $ 1,103,170
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Proceeds from sales of loans and leases | $ 23,708 | $ 397,107 |
Variable Interest Entity, Not Primary Beneficiary |  |  |
Receivable, Held-for-Sale [Abstract] |  |  |
Investment securities held to maturity |  | 436,800 |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Proceeds from sales of loans and leases |  | $ 115,100 |

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