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Investment Securities - Schedule of Income Earned on Available-for Sale Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Investment Income [Line Items] |  |  |  |
Income earned on securities, taxable | $ 26,326 | $ 31,006 | $ 80,203 | $ 96,822
Income earned on securities, non-taxable | 7,743 | 7,704 | 23,019 | 23,276
Total | 34,069 | 38,710 | 103,222 | 120,098
Available-for-sale |  |  |  |
Investment Income [Line Items] |  |  |  |
Income earned on securities, taxable | 18,899 | 23,550 | 57,991 | 74,439
Income earned on securities, non-taxable | 4,706 | 4,612 | 13,865 | 13,971
Held-to-maturity |  |  |  |
Investment Income [Line Items] |  |  |  |
Income earned on securities, taxable | 7,427 | 7,456 | 22,212 | 22,383
Income earned on securities, non-taxable | $ 3,037 | $ 3,092 | $ 9,154 | $ 9,305

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