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Investment Securities - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Securities Financing Transactions Disclosures [Abstract] |  |  |
AFS accrued interest | $ 986 |  |
Held-to-maturity securities | 393,320 |  | $ 399,128
HTM accrued interest | 1,800 |  |
Available-for-sale securities pledged as collateral | 408,300 |  | 380,300
Letter of credit outstanding, amount | 138,900 |  | $ 153,500
Net gains | $ 0 | $ 0 |
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Accrued interest receivable |  |

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