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Investment Securities (Realized Gain Loss Table) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Proceeds and gross unrealized gains and losses on sales of available-for-sale securities      
Realized gains $ 382us-gaap_AvailableForSaleSecuritiesGrossRealizedGains $ 3,786us-gaap_AvailableForSaleSecuritiesGrossRealizedGains $ 3,786us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Realized losses (216)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (6,589)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses 0us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Net securities gains $ 166us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet $ (2,803)us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet $ 3,786us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet