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MORTGAGE BANKING OPERATIONS - Sensitivity Analysis (Details) - Single family - USD ($) $ in Thousands | 9 Months Ended |  |  |  |  |
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Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Key economic assumptions and the sensitivity of the current fair value for single family MSRs |  |  |  |  |  |
Fair value of single family MSR | $ 70,800 | $ 73,725 | $ 74,249 | $ 76,470 | $ 76,314 | $ 76,617
Expected weighted-average life (in years) | 8 years 1 month 24 days |  |  |  |  |
CPR |  |  |  |  |  |
Impact on fair value of 25 basis points adverse change in interest rates | $ (995) |  |  |  |  |
Impact on fair value of 50 basis points adverse change in interest rates | (2,158) |  |  |  |  |
Discount rate |  |  |  |  |  |
Impact on fair value of 100 basis points increase | (2,380) |  |  |  |  |
Impact on fair value of 200 basis points increase | $ (5,005) |  |  |  |  |

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