Securities Available for Sale and Held to Maturity - Securities Held to Maturity by Credit Rating, as Determined by Moody's (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Schedule Of Available For Sale And Held To Maturity Securities [Line Items] | ||
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss | $ 1,290,572 | $ 1,335,385 |
| Aaa [Member] | ||
| Schedule Of Available For Sale And Held To Maturity Securities [Line Items] | ||
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss | 53,200 | 1,335,385 |
| Aa1 to Aa3 [Member] | ||
| Schedule Of Available For Sale And Held To Maturity Securities [Line Items] | ||
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss | $ 1,237,372 | $ 0 |