Segment Information - Segment Disclosures (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 1,215,877	$ 949,525
Total depreciation and amortization	307,568	217,006
Capital expenditures	349,729	277,242
Americas [Member]
Segment Reporting Information [Line Items]
Total revenues	602,627	436,447
Total depreciation and amortization	157,578	87,927
Capital expenditures	147,329	153,435
EMEA [Member]
Segment Reporting Information [Line Items]
Total revenues	379,630	314,847
Total depreciation and amortization	93,280	76,168
Capital expenditures	154,391	83,584
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total revenues	233,620	198,231
Total depreciation and amortization	56,710	52,911
Capital expenditures	$ 48,009	$ 40,223