Segments - Schedule of Company's Segment Results (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Operating income	$ 191,055	$ 188,460	$ 538,178	$ 521,385
Depreciation and amortization	57,084	48,526	141,848	145,435
Capital expenditures	17,120	13,292	41,877	29,526
Revenues, net	484,426	451,493	1,316,593	1,272,264
Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Operating income	135,760	132,428	367,221	351,778
Depreciation and amortization	32,739	32,257	96,351	96,200
Capital expenditures	11,980	6,493	28,501	14,510
Revenues, net	345,868	334,944	950,542	918,333
Operating Segments [Member] | International
Segment Reporting Information [Line Items]
Operating income	55,295	56,032	170,957	169,607
Depreciation and amortization	24,345	16,269	45,497	49,235
Capital expenditures	5,140	6,799	13,376	15,016
Revenues, net	$ 138,558	$ 116,549	$ 366,051	$ 353,931