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Allowance for Loss - Sharing Obligations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Loss Contingency Accrual [Roll Forward] |  |  |
Provisions for loss sharing | $ 11,782 | $ 15,695 | $ 1,862
Guarantee obligations | 34,800 | 34,600 |
Allowance for loss sharing obligations | $ 48,300 | $ 37,000 |
Loss-sharing obligations (as a percent) | 0.21% | 0.17% |
Impact of adopting CECL | $ 11,600 |  |
Loss-Sharing Obligation |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |
Beginning balance | 71,634 | $ 57,168 |
Provisions for loss sharing | 13,319 | 17,864 |
Provisions reversal for loan repayments | (764) | (2,169) |
Recoveries (charge-offs), net | (1,039) | (1,229) |
Ending balance | 83,150 | 71,634 | $ 57,168
Outstanding advances under the Fannie Mae DUS program | 1,900 | 1,100 |
Maximum quantifiable liability | $ 4,300,000 | $ 3,950,000 |

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