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Derivatives - Impact of Derivative Instruments on Income Statement (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Derivative [Line Items]    
Unrealized loss on foreign currency contracts $ (974) $ 0
Not Designated as Hedging Instrument | Foreign currency contracts    
Derivative [Line Items]    
Total net loss on foreign currency contracts (1,688) 0
Not Designated as Hedging Instrument | Other income | Foreign currency contracts    
Derivative [Line Items]    
Unrealized loss on foreign currency contracts (974) 0
Realized loss on foreign currency contracts $ (714) $ 0