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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
CPRs |  |  |
Rates per annum [Abstract] |  |  |
Servicing asset, measurement input | 10.91% | 8.84% | 11.37%
Discount Rates |  |  |
Rates per annum [Abstract] |  |  |
Servicing asset, measurement input | 9.35% | 8.23% | 7.82%

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