Derivative and Credit Risk Transfer Strip Assets and Liabilities - Net Gains (Losses) Recognized on Derivative Financial Instruments (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Interest Rate Lock Commitments [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Net gains on derivative financial instruments used as economic hedges | $ 2,904 | $ (3,292) | $ 7,078 | $ (5,980) |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net |
| Interest rate lock commitments and loans acquired for sale [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Net gains on derivative financial instruments used as economic hedges | $ (12,338) | $ 7,163 | $ (38,697) | $ 9,773 |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net | Gain (Loss) on Sales of Loans, Net |
| Mortgage service rights [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Net gains on derivative financial instruments used as economic hedges | $ (60,637) | $ (18,365) | $ (100,581) | $ (108,179) |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset | Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset | Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset | Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset |
| Assets Sold Under Agreements to Repurchase [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Net gains on derivative financial instruments used as economic hedges | $ 0 | $ 0 | $ 0 | $ 20,098 |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings |
| CRT Derivatives [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Net gains on derivative financial instruments used as economic hedges | $ 5,375 | $ 5,039 | $ 7,355 | $ 15,229 |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings | Gain Loss On Investments And Financings |