Financial Instruments and Fair Value Measurements - Summary of Recognized Unrealized Gains (Losses) in Foreign Currency and Derivative Gains (Losses) Net on Remeasurement of Unhedged Portion of Debt and Accrued Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivatives Fair Value [Line Items]
Foreign currency translation gains (losses), net	$ (45,576)	$ 30,053	$ (180,162)	$ 42,471
Forward Contracts [Member]
Derivatives Fair Value [Line Items]
Foreign currency translation gains (losses), net	$ (77,000)	$ 40,000	$ (51,000)	$ 41,000