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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Investment Securities [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 5,042  
Debt securities available for sale, Due from one to five years, Amortized Cost 175,737  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 306,996  
Debt securities available for sale, Due after ten years, Amortized Cost 114,164  
Debt securities available for sale, Amortized Cost 601,939  
Debt securities available for sale, Due in one year or less, Fair Value 5,047  
Debt securities available for sale, Due from one to five years, Fair Value 179,161  
Debt securities available for sale, Due after five years through ten years, Fair Value 317,590  
Debt securities available for sale, Due after ten years, Fair Value 117,921  
Debt securities available for sale, Fair Value 619,719  
Debt securities held to maturity, Due in one year or less, Amortized Cost 38,909  
Debt securities held to maturity, Due from one to five years, Amortized Cost 176,378  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 92,311  
Debt securities held to maturity, Due after ten years, Amortized Cost 170,951  
Securities held to maturity, Amortized Cost 478,549 $ 485,717
Debt securities held to maturity, Due in one year or less, Fair Value 39,051  
Debt securities held to maturity, Due from one to five years, Fair Value 182,498  
Debt securities held to maturity, Due after five years through ten years, Fair Value 96,184  
Debt securities held to maturity, Due after ten years, Fair Value 173,100  
Securities held to maturity, Fair Value $ 490,833 $ 490,064