Segment Information - Schedule of Revenue from External Customers and Identifiable Assets, by Geographical Areas (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net Revenue	$ 678,808	$ 624,859	$ 717,180	$ 623,464	$ 691,565	$ 608,908	$ 534,680	$ 498,218	$ 2,644,311	$ 2,333,371	$ 2,353,608
Operating Income (Loss)	358,536	$ 144,212	$ 172,501	$ 150,197	156,856	$ 148,992	$ 113,236	$ 98,377	825,446	517,461	(16,620)
Identifiable Assets	4,928,677				4,556,508				4,928,677	4,556,508	4,477,774
Americas [Member]
Segment Reporting Information [Line Items]
Net Revenue									1,558,070	1,399,285	1,322,898
Operating Income (Loss)									596,044	335,887	(259,538)
Identifiable Assets	2,600,412				3,015,267				2,600,412	3,015,267	2,811,850
EMEA [Member]
Segment Reporting Information [Line Items]
Net Revenue									903,525	795,932	813,136
Operating Income (Loss)									193,781	168,745	163,612
Identifiable Assets	2,039,385				1,286,149				2,039,385	1,286,149	1,405,555
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Revenue									182,716	138,154	217,574
Operating Income (Loss)									35,621	12,829	79,306
Identifiable Assets	$ 288,880				$ 255,092				$ 288,880	$ 255,092	$ 260,369