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PORTFOLIO LOANS - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Pledged loans | $ 7,724,116 | $ 7,559,294
Total pledged loans |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Pledged loans | 5,691,193 | 5,588,395
FHLB |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Pledged loans | 4,935,257 | 4,865,481
Federal Reserve Bank |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Pledged loans | $ 755,936 | $ 722,914

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