Segment Information - Segment Disclosures (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Total revenues	$ 949,525	$ 844,156
Total depreciation and amortization	217,006	200,534
Capital expenditures	277,242	197,700
Americas [Member]
Segment Reporting Information [Line Items]
Total revenues	436,447	404,394
Total depreciation and amortization	87,927	76,259
Capital expenditures	153,435	83,499
EMEA [Member]
Segment Reporting Information [Line Items]
Total revenues	314,847	267,856
Total depreciation and amortization	76,168	76,050
Capital expenditures	83,584	57,273
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total revenues	198,231	171,906
Total depreciation and amortization	52,911	48,225
Capital expenditures	$ 40,223	$ 56,928