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Fair Value, Company's Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Servicing Related Assets [Abstract] |  |  |  |  |  |  |
Beginning Balance | [1] |  |  |  |  | $ 233,658 |
Changes in Fair Value due to [Abstract] |  |  |  |  |  |  |
Ending Balance | [1] | $ 218,688 |  |  |  | 218,688 |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |  |  |  |  |  |  |
Servicing Related Assets [Abstract] |  |  |  |  |  |  |
Beginning Balance |  | 224,601 |  | $ 234,263 |  | 233,658 | $ 253,629
Purchases, Sales and Other Changes [Abstract] |  |  |  |  |  |  |
Sales |  | 0 |  | 0 |  | 0 | (12,804)
Other changes |  | (1) | [2] | (14) | [2] | (2) | (7)
Total |  | (1) |  | (14) |  | (2) | (12,811)
Changes in Fair Value due to [Abstract] |  |  |  |  |  |  |
Changes in valuation inputs or assumptions used in valuation model |  | (2,121) |  | (3,624) |  | (4,154) | (1,586)
Other changes in fair value |  | $ (3,791) | [3] | $ (3,843) | [3] | $ (10,814) | $ (12,450)
Servicing Asset, Fair Value, Change in Fair Value, Other, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Unrealized Gain (Loss) On Investments In Servicing Related Assets |  | Unrealized Gain (Loss) On Investments In Servicing Related Assets |  | Unrealized Gain (Loss) On Investments In Servicing Related Assets | Unrealized Gain (Loss) On Investments In Servicing Related Assets
Unrealized gain (loss) included in Net Income |  | $ (5,912) |  | $ (7,467) |  | $ (14,968) | $ (14,036)
Ending Balance |  | $ 218,688 |  | $ 226,782 |  | $ 218,688 | $ 226,782
[1] | See Note 9 regarding the estimation of fair value, which approximates carrying value for all pools.
[2] | Represents purchase price adjustments, principally contractual prepayment protection, and changes due to the Company’s repurchase of the underlying collateral.
[3] | Represents changes due to realization of expected cash flows and estimated MSR runoff.

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