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Securities (Summary of Amounts Relating to Sales of Securities) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Available for Sale and Held to Maturity Securities [Line Items]      
Proceeds from sales $ 547us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds $ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds $ 42,158us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds
Gross realized gains 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 1,224us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Gross realized losses 0us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses 0us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (1)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Net realized gains on securities $ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet $ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet $ 1,223us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet