Securities Available for Sale and Held to Maturity - Securities Held to Maturity by Credit Rating, as Determined by Moody's (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Schedule Of Available For Sale And Held To Maturity Securities [Line Items] | ||
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss | $ 1,159,676 | $ 1,207,454 |
| 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 | 51,891 | 52,405 |
| 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 | $ 1,107,785 | $ 1,155,049 |