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Derivative Financial Instruments Offsetting of Derivative Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Offsetting Liabilities [Line Items]    
Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets $ 1,726 $ 2,176
Derivative Liability, Fair Value, Amount Not Offset Against Collateral (198) (40)
Cash Collateral Pledged Not Offset in the Consolidated Balance Sheets 0 0
Net Amount $ 1,528 $ 2,136