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COMMITMENTS, GUARANTEES AND CONTINGENCIES - Schedule of Commitments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Loss Contingencies [Line Items] |  |
Unfunded commitment balance of loans sold on a servicing-retained basis | $ 1,273,939 | $ 1,365,959
Unused consumer portfolio lines |  |
Loss Contingencies [Line Items] |  |
Unfunded commitment balance of loans sold on a servicing-retained basis | 586,904 | 531,784
Commercial portfolio lines |  |
Loss Contingencies [Line Items] |  |
Unfunded commitment balance of loans sold on a servicing-retained basis | 648,609 | 788,108
Commitments to fund loans |  |
Loss Contingencies [Line Items] |  |
Unfunded commitment balance of loans sold on a servicing-retained basis | 38,426 | 46,067
Undisbursed construction loan funds |  |
Loss Contingencies [Line Items] |  |
Unfunded commitment balance of loans sold on a servicing-retained basis | $ 403,000 | $ 525,000

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