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Derivatives - Gross and Net Fair Value of Derivatives (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative Asset Positions, Gross position - asset $ 0 $ 316
Derivative Asset Positions, Netting adjustment 0 (106)
Derivative Asset Positions, Net position - asset 0 210
Derivative Liability Positions, Gross position - liability (764) (106)
Derivative Liability Positions, Netting adjustment 0 106
Derivative Liability Positions, Net position - liability $ (764) $ 0