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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Investment Securities [Abstract]    
Debt securities available for sale, Due in one year or less, Amortized Cost $ 22,102us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost  
Debt securities available for sale, Due from one to five years, Amortized Cost 136,917us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost  
Debt securities available for sale, Due after five years through ten years, Amortized Cost 214,050us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost  
Debt securities available for sale, Due after ten years, Amortized Cost 246,224us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost  
Debt securities available for sale, Amortized Cost 619,293us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost  
Debt securities available for sale, Due in one year or less, Fair Value 22,104us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue  
Debt securities available for sale, Due from one to five years, Fair Value 136,720us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue  
Debt securities available for sale, Due after five years through ten years, Fair Value 217,119us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue  
Debt securities available for sale, Due after ten years, Fair Value 246,551us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue  
Debt securities available for sale, Fair Value 622,494us-gaap_AvailableForSaleSecuritiesDebtSecurities  
Debt securities held to maturity, Due in one year or less, Amortized Cost 23,659us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount  
Debt securities held to maturity, Due from one to five years, Amortized Cost 136,752us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount  
Debt securities held to maturity, Due after five years through ten years, Amortized Cost 116,862us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount  
Debt securities held to maturity, Due after ten years, Amortized Cost 17,165us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount  
Held-to-maturity Securities, Total 294,438us-gaap_HeldToMaturitySecurities 249,785us-gaap_HeldToMaturitySecurities
Debt securities held to maturity, Due in one year or less, Fair Value 23,734us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue  
Debt securities held to maturity, Due from one to five years, Fair Value 138,499us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue  
Debt securities held to maturity, Due after five years through ten years, Fair Value 119,151us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue  
Debt securities held to maturity, Due after ten years, Fair Value 17,311us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue  
Securities held to maturity, Fair Value $ 298,695us-gaap_HeldToMaturitySecuritiesFairValue $ 250,657us-gaap_HeldToMaturitySecuritiesFairValue