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Other Income (Expense), Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Income and Expenses [Abstract]      
Net gain (loss) on foreign currency exchange contracts $ 545 $ (3,603) $ (1,251)
Net gain (loss) on foreign currency exchange transactions (4,987) 2,174 1,911
Other income (expense) (15) 581 180
Other income (expense), net $ (4,457) $ (848) $ 840