Segments - Schedule of Company's Segment Results (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues, net	$ 647,094	$ 584,985	[1]	$ 1,268,919		$ 1,170,484	[1]
Operating income	297,317	264,783	[1]	581,493		524,870	[1]
Depreciation and amortization	70,908	68,610	[1]	138,353		140,112	[1]
Capital expenditures	17,470	19,400		31,975	[2]	34,614
North America
Segment Reporting Information [Line Items]
Revenues, net	417,941	370,949		814,840		735,218
Operating income	184,198	161,376		356,609		317,326
Depreciation and amortization	41,875	38,317		80,167		76,992
Capital expenditures	11,306	11,685		19,683		20,096
International
Segment Reporting Information [Line Items]
Revenues, net	229,153	214,036		454,079		435,266
Operating income	113,119	103,407		224,884		207,544
Depreciation and amortization	29,033	30,293		58,186		63,120
Capital expenditures	$ 6,164	$ 7,715		$ 12,292		$ 14,518

[1] Reflects reclassifications from previously disclosed amounts to conform to current presentation.

[2] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using the modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 2.