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Offsetting of Derivative Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Offsetting Derivative Liabilities [Abstract]    
Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets $ 846 $ 1,383
Derivative Liability, Fair Value, Amount Not Offset Against Collateral (687) (1,322)
Cash Collateral Pledged Not Offset in the Consolidated Balance Sheets 0 0
Derivative Liability, Fair Value, Amount Offset Against Collateral $ 159 $ 61