Mortgage Servicing Rights - Summary of MSRs Carried at Fair Value (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
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| Summary Of Mortgage Servicing Rights [Line Items] | ||||||||||||
| Balance at beginning of period | $ 3,770,034 | $ 3,951,737 | $ 3,867,394 | $ 3,919,107 | ||||||||
| (Price adjustment) purchases | 0 | (13) | 0 | 29,428 | ||||||||
| Servicing Asset At Fair Value Additions From Loan Sales | 44,030 | 40,619 | 91,039 | 71,868 | ||||||||
| Transfers to Agency of mortgage servicing rights relating to delinquent loans | 170 | 74 | 391 | 216 | ||||||||
| Due to changes in inputs used in valuation model | 22,713 | [1] | 46,039 | [1] | (33,118) | [1] | 117,609 | |||||
| Other changes in fair value | (97,841) | [2] | (96,595) | [2] | (186,600) | [2] | (196,367) | |||||
| Change in fair value, Total | (75,128) | (50,556) | (219,718) | (78,758) | ||||||||
| Balance at end of period | 3,739,106 | $ 3,941,861 | 3,739,106 | $ 3,941,861 | ||||||||
| Pledged Assets [Member] | ||||||||||||
| Summary Of Mortgage Servicing Rights [Line Items] | ||||||||||||
| Fair value of mortgage servicing rights pledged to secure Assets sold under agreements to repurchase and Notes payable secured by credit risk transfer and mortgage servicing assets | $ 3,677,782 | $ 3,677,782 | $ 3,807,065 | |||||||||
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