Investment Securities Available For Sale, at Fair Value - Schedule of Weighted Average Lives of Investment Securities (Details) - USD ($) $ in Thousands |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| 0 to 5 years | $ 1,630,237 | $ 604,459 |
| Over 5 to 10 years | 5,054,934 | 2,923,871 |
| 10+ years | 153,544 | 300,214 |
| Total | $ 6,838,715 | $ 3,828,544 |