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PORTFOLIO LOANS - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Portfolio loans, net | $ 7,559,294 | $ 7,634,094
Asset Pledged as Collateral |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Portfolio loans, net | 5,588,395 | 5,900,166
FHLB |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Portfolio loans, net | 4,865,481 | 5,095,448
Federal Reserve Bank |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Portfolio loans, net | $ 722,914 | $ 804,718

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