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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Investment Securities [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 5,101  
Debt securities available for sale, Due from one to five years, Amortized Cost 179,535  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 300,883  
Debt securities available for sale, Due after ten years, Amortized Cost 112,137  
Debt securities available for sale, Amortized Cost 597,656  
Debt securities available for sale, Due in one year or less, Fair Value 5,137  
Debt securities available for sale, Due from one to five years, Fair Value 182,050  
Debt securities available for sale, Due after five years through ten years, Fair Value 308,638  
Debt securities available for sale, Due after ten years, Fair Value 114,188  
Debt securities available for sale, Fair Value 610,013  
Debt securities held to maturity, Due in one year or less, Amortized Cost 20,934  
Debt securities held to maturity, Due from one to five years, Amortized Cost 174,277  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 111,349  
Debt securities held to maturity, Due after ten years, Amortized Cost 169,723  
Securities held to maturity, Amortized Cost 476,283 $ 485,717
Debt securities held to maturity, Due in one year or less, Fair Value 20,987  
Debt securities held to maturity, Due from one to five years, Fair Value 178,726  
Debt securities held to maturity, Due after five years through ten years, Fair Value 115,419  
Debt securities held to maturity, Due after ten years, Fair Value 170,731  
Securities held to maturity, Fair Value $ 485,863 $ 490,064