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Investment Securities (Scheduled Maturities of Securities Available for Sale and Securities Held to Maturity) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Investments [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 37  
Debt securities available for sale, Due from one to five years, Amortized Cost 41,028  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 133,978  
Debt securities available for sale, Due after ten years, Amortized Cost 862,947  
Securities available for sale, Amortized Cost 1,037,990 $ 1,127,057
Debt securities available for sale, Due in one year or less, Fair Value 36  
Debt securities available for sale, Due from one to five years, Fair Value 37,505  
Debt securities available for sale, Due after five years through ten years, Fair Value 119,497  
Debt securities available for sale, Due after ten years, Fair Value 730,692  
Debt securities available for sale, Fair Value 887,730 954,371
Debt securities held to maturity, Due in one year or less, Amortized Cost 26,357  
Debt securities held to maturity, Due from one to five years, Amortized Cost 30,785  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 30,028  
Debt securities held to maturity, Due after ten years, Amortized Cost 60,990  
Securities held to maturity, Amortized Cost 148,160 188,980
Debt securities held to maturity, Due in one year or less, Fair Value 26,202  
Debt securities held to maturity, Due from one to five years, Fair Value 30,100  
Debt securities held to maturity, Due after five years through ten years, Fair Value 27,140  
Debt securities held to maturity, Due after ten years, Fair Value 53,588  
Securities held to maturity, Fair Value $ 137,030 $ 174,188