Segment Information - Segment Disclosures (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 1,261,943	$ 1,066,421	$ 2,477,820	$ 2,015,946
Total depreciation and amortization	307,331	254,786	614,899	471,792
Capital expenditures	520,239	348,572	869,968	625,814
Americas [Member]
Segment Reporting Information [Line Items]
Total revenues	618,275	533,608	1,220,902	970,055
Total depreciation and amortization	159,922	124,342	317,500	212,269
Capital expenditures	200,277	160,679	347,606	314,114
EMEA [Member]
Segment Reporting Information [Line Items]
Total revenues	383,168	322,944	762,798	637,791
Total depreciation and amortization	88,492	78,962	181,772	155,130
Capital expenditures	222,377	151,485	376,768	235,069
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total revenues	260,500	209,869	494,120	408,100
Total depreciation and amortization	58,917	51,482	115,627	104,393
Capital expenditures	$ 97,585	$ 36,408	$ 145,594	$ 76,631