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Fair Value of Financial Instruments - Additional Information (Details) - Forward contracts - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Fair Value, Option, Quantitative Disclosures [Line Items]          
Derivative, notional amount $ 895,200   $ 895,200   $ 626,500
Other accounts receivable          
Fair Value, Option, Quantitative Disclosures [Line Items]          
Fair value foreign currency forward contracts, asset 0   0   431
Accrued expenses          
Fair Value, Option, Quantitative Disclosures [Line Items]          
Fair value foreign currency forward contracts, liability 87   87   $ 0
Other (expenses) income, net          
Fair Value, Option, Quantitative Disclosures [Line Items]          
Recognized gains (losses) of foreign currency forward contracts $ 2,099 $ (17,650) (8,316) $ (12,831)  
Other, net          
Fair Value, Option, Quantitative Disclosures [Line Items]          
Change in the fair value of foreign currency forward contracts     8,300 12,800  
Cash settlements     $ (7,800) $ (18,000)