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Derivatives - Fair Value (Details) - Fair Value, Measurements, Recurring [Member] - Foreign Exchange Forward [Member] - Not Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Estimate of Fair Value Measurement [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency exchange contracts $ 158 $ (1,146)
Level 1 [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency exchange contracts 0 0
Level 2 [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency exchange contracts 158 (1,146)
Level 3 [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency exchange contracts $ 0 $ 0