Financial Instruments and Fair Value Measurements - Summary of Changes in Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative translation adjustment	$ 15,875	$ 111,554
Total foreign currency translation gains, net	60,080	4,770
Total unrealized losses on derivative contracts, net	(2,633)	(6,287)
Total change in other comprehensive income (loss)	57,447	(1,517)
Designated As Hedging Instrument [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total derivative hedging instruments	(19,452)	3,093
Designated As Hedging Instrument [Member] | Non derivative Net Investment Hedge [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Nonderivative net investment hedges	63,657	(109,877)
Designated As Hedging Instrument [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total derivative hedging instruments	1,105	(9,285)
Designated As Hedging Instrument [Member] | Our Share of Derivatives from Unconsolidated Co-Investment Ventures [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total derivative hedging instruments	$ (3,738)	$ 2,998