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MORTGAGE BANKING OPERATIONS - Single Family MSR Roll Forward (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Additions and amortization: |  |  |  |
Amortization | $ 1,626 | $ 2,515 | $ 3,310 | $ 5,940
Changes in fair value of MSR assumptions | 1,320 | 4,323 | 1,009 | 14,626
Ending balance | 76,314 |  | 76,314 |
Single family |  |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |  |
Beginning balance | 75,701 | 72,378 | 76,617 | 61,584
Additions and amortization: |  |  |  |
Originations | 919 | 2,295 | 1,538 | 6,211
Purchases | 0 | 0 | 460 | 0
Amortization | (1,626) | (2,515) | (3,310) | (5,940)
Net additions and amortization | (707) | (220) | (1,312) | 271
Changes in fair value of MSR assumptions | 1,320 | 4,323 | 1,009 | 14,626
Ending balance | $ 76,314 | $ 76,481 | $ 76,314 | $ 76,481

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