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Other Income (Expense), Net (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Other Income and Expenses [Abstract]        
Net gain (loss) on foreign currency exchange contracts $ (1,488) $ (218) $ (2,852) $ (894)
Net gain (loss) on foreign currency exchange transactions 1,176 439 2,512 2,455
Other income (expense) 373 114 342 165
Other income (expense), net $ 61 $ 335 $ 2 $ 1,726