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Derivative and Other Fair Value Instruments (Details 4) (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      
Proceeds from sale of investment securities $ 57us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities $ 4,878us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities $ 0us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
(Gains) on Sale of Securities, Net 0us-gaap_GainLossOnSaleOfSecuritiesNet (2,122)us-gaap_GainLossOnSaleOfSecuritiesNet 0us-gaap_GainLossOnSaleOfSecuritiesNet
Available-for-sale Securities [Member]      
Schedule of Available for Sale and Held to Maturity Securities      
Proceeds from sale of investment securities   2,800us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_AvailableforsaleSecuritiesMember		  
(Gains) on Sale of Securities, Net   $ 2,100us-gaap_GainLossOnSaleOfSecuritiesNet
/ us-gaap_InvestmentTypeAxis
= us-gaap_AvailableforsaleSecuritiesMember