Investment Securities Available For Sale, at Fair Value - Schedule of Weighted Average Lives of Investment Securities (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| 0 to 5 years | $ 213,718 | $ 1,523,025 |
| Over 5 to 10 years | 7,014,578 | 5,165,072 |
| 10+ years | 114,865 | 216,684 |
| Total | $ 7,343,161 | $ 6,904,781 |
| X | ||||||||||
- Definition Debt Securities, Trading, Available-For-Sale, Debt Maturities, Zero Through Year Five, Fair Value No definition available.
|
| X | ||||||||||
- Definition Debt Securities, Trading, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value No definition available.
|
| X | ||||||||||
- Definition Debt Securities, Trading, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value No definition available.
|
| X | ||||||||||
- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|