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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Investment Securities [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 105  
Debt securities available for sale, Due from one to five years, Amortized Cost 153,605  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 268,354  
Debt securities available for sale, Due after ten years, Amortized Cost 121,999  
Debt securities available for sale, Amortized Cost 544,063  
Debt securities available for sale, Due in one year or less, Fair Value 105  
Debt securities available for sale, Due from one to five years, Fair Value 156,094  
Debt securities available for sale, Due after five years through ten years, Fair Value 277,631  
Debt securities available for sale, Due after ten years, Fair Value 125,665  
Debt securities available for sale, Fair Value 559,495  
Debt securities held to maturity, Due in one year or less, Amortized Cost 42,584  
Debt securities held to maturity, Due from one to five years, Amortized Cost 178,401  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 92,745  
Debt securities held to maturity, Due after ten years, Amortized Cost 214,978  
Securities held to maturity, Amortized Cost 528,708 $ 485,717
Debt securities held to maturity, Due in one year or less, Fair Value 42,684  
Debt securities held to maturity, Due from one to five years, Fair Value 183,536  
Debt securities held to maturity, Due after five years through ten years, Fair Value 95,657  
Debt securities held to maturity, Due after ten years, Fair Value 216,753  
Securities held to maturity, Fair Value $ 538,630 $ 490,064