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MORTGAGE BANKING OPERATIONS - SF MSR Roll Forward (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Additions and amortization: |  |  |
Amortization | $ 6,378 | $ 9,951 | $ 19,669
Changes in fair value assumptions | (414) | (16,739) | (7,379)
Ending balance | 74,249 |  |
Single family |  |  |
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |
Beginning balance | 76,617 | 61,584 | 49,966
Additions and amortization: |  |  |
Originations | 3,136 | 8,245 | 23,908
Servicing Asset at Fair Value Additions Purchase | 460 | 0 | 0
Amortization | (6,378) | (9,951) | (19,669)
Net additions and amortization | (2,782) | (1,706) | 4,239
Changes in fair value assumptions | 414 | 16,739 | 7,379
Ending balance | $ 74,249 | $ 76,617 | $ 61,584

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