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Derivatives (Details) - Foreign currency forward contracts [Member] - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Prepaid expenses and other current assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instruments and Hedges, Liabilities $ 81 $ 0
Accrued expenses [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instruments and Hedges, Liabilities $ 0 $ 165