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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Investments [Abstract]    
Debt securities available for sale, Due from one to five years, Amortized Cost $ 64,382  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 167,809  
Debt securities available for sale, Due after ten years, Amortized Cost 183,661  
Securities available for sale, Amortized Cost 415,852 $ 455,582
Debt securities available for sale, Due from one to five years, Fair Value 65,028  
Debt securities available for sale, Due after five years through ten years, Fair Value 168,755  
Debt securities available for sale, Due after ten years, Fair Value 184,134  
Debt securities available for sale, Fair Value 417,917 445,677
Debt securities held to maturity, Due in one year or less, Amortized Cost 54,606  
Debt securities held to maturity, Due from one to five years, Amortized Cost 124,235  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 34,838  
Debt securities held to maturity, Due after ten years, Amortized Cost 145,321  
Securities held to maturity, Amortized Cost 359,000 446,581
Debt securities held to maturity, Due in one year or less, Fair Value 54,937  
Debt securities held to maturity, Due from one to five years, Fair Value 127,172  
Debt securities held to maturity, Due after five years through ten years, Fair Value 35,494  
Debt securities held to maturity, Due after ten years, Fair Value 145,656  
Securities held to maturity, Fair Value $ 363,259 $ 439,581