Investment Securities - Summary of Pledged Securities (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Debt Securities, Available-for-sale [Line Items] | ||||
| Held-to-maturity | [1] | $ 878,076 | $ 922,837 | |
| Asset Pledged as Collateral | Securing public and trust department deposits, and repurchase agreements | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| Available-for-sale | 316,646 | 328,516 | ||
| Held-to-maturity | 761,771 | 704,470 | ||
| Asset Pledged as Collateral | Securing additional borrowing capacity at the FHLB and the FRB | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| Available-for-sale | 83,188 | 4,018 | ||
| Held-to-maturity | $ 39,864 | $ 68,425 | ||
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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, 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/2009/role/commonPracticeRef
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- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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