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Investment Securities (Scheduled Maturities of Securities Available for Sale and Securities Held to Maturity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Investments [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 16  
Debt securities available for sale, Due from one to five years, Amortized Cost 91,628  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 87,217  
Debt securities available for sale, Due after ten years, Amortized Cost 832,988  
Securities available for sale, Amortized Cost 1,011,849 $ 1,037,990
Debt securities available for sale, Due in one year or less, Fair Value 16  
Debt securities available for sale, Due from one to five years, Fair Value 85,664  
Debt securities available for sale, Due after five years through ten years, Fair Value 80,109  
Debt securities available for sale, Due after ten years, Fair Value 721,027  
Debt securities available for sale, Fair Value 886,816 887,730
Debt securities held to maturity, Due in one year or less, Amortized Cost 18,896  
Debt securities held to maturity, Due from one to five years, Amortized Cost 21,975  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 22,940  
Debt securities held to maturity, Due after ten years, Amortized Cost 57,471  
Securities held to maturity, Amortized Cost 121,282 148,160
Debt securities held to maturity, Due in one year or less, Fair Value 18,771  
Debt securities held to maturity, Due from one to five years, Fair Value 21,257  
Debt securities held to maturity, Due after five years through ten years, Fair Value 21,487  
Debt securities held to maturity, Due after ten years, Fair Value 51,098  
Securities held to maturity, Fair Value $ 112,613 $ 137,030