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Derivative Financial Instruments - Summary of Effect of Foreign Currency Exchange Contracts on Consolidated Financial Statements (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Derivatives designated as hedges:  
Gains (losses) recognized in accumulated OCI (effective portion) $ (286)
Gains (losses) reclassified from accumulated OCI into operating expenses (effective portion) 64
Derivatives not designated as hedges:  
Gains (losses) recognized in other income (expense), net $ (80)