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Derivative Financial Instruments Offsetting of Derivative Assets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets $ 345us-gaap_DerivativeFairValueOfDerivativeAsset $ 182us-gaap_DerivativeFairValueOfDerivativeAsset
Derivative Financial Instruments Not Offset in the Consolidated Balance Sheets (267)us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral (182)us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Cash Collateral Received Not Offset in the Consolidated Balance Sheets 0us-gaap_DerivativeCollateralObligationToReturnCash 0us-gaap_DerivativeCollateralObligationToReturnCash
Derivative Asset, Fair Value, Amount Offset Against Collateral $ 78us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral $ 0us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral