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Investment Securities Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Debt Securities, Held-to-Maturity, Fair Value $ 1,046,932 $ 1,072,207
Collateral Pledged [Member]    
Schedule of Investments [Line Items]    
Securities pledged as collateral $ 600,000 $ 400,000