Fair Value Measurements Notional Amount of Financial Instruments (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Notional Disclosures [Abstract] | ||
| Whole loan contracts and related committed IRLCs | $ 2,654 | $ 0 |
| Uncommitted IRLCs | 513,409 | 300,595 |
| FMBSs related to uncommitted IRLCs | 514,000 | 335,000 |
| Whole loan contracts and related mortgage loans held for sale | 11,473 | 15,044 |
| FMBSs related to mortgage loans held for sale | 246,000 | 290,000 |
| Mortgage loans held for sale covered by FMBSs | $ 243,098 | $ 302,790 |