Segments - Schedule of Company's Segment Results (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues, net		$ 643,422	$ 619,586	$ 584,985	$ 585,500	$ 609,991	$ 577,877	$ 541,237	$ 520,433	$ 2,433,492	[1]	$ 2,249,538	$ 1,831,546
Operating income:		284,738	$ 281,090	$ 264,783	$ 260,087	240,012	$ 232,637	$ 216,043	$ 195,068	1,090,698	[1]	883,760	754,153
Depreciation and amortization										274,609	[1]	264,560	203,256
Capital expenditures:	[2]									81,387		70,093	59,011
Long-lived assets (excluding goodwill and investments):		2,741,743				3,020,209				2,741,743		3,020,209	2,867,689
North America
Segment Reporting Information [Line Items]
Revenues, net										1,571,466		1,428,711	1,279,102
Operating income:										673,867		541,598	506,414
Depreciation and amortization										154,405		139,418	129,653
Capital expenditures:										36,514		40,747	39,000
Long-lived assets (excluding goodwill and investments):		1,799,149				1,888,599				1,799,149		1,888,599	1,664,224
International
Segment Reporting Information [Line Items]
Revenues, net										862,026		820,827	552,444
Operating income:										416,831		342,162	247,739
Depreciation and amortization										120,204		125,142	73,603
Capital expenditures:										44,873		29,346	20,011
Long-lived assets (excluding goodwill and investments):		$ 942,594				$ 1,131,610				$ 942,594		$ 1,131,610	$ 1,203,465

[1] Reflects the impact of the Company's adoption of Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASC 606") and related cost capitalization guidance, which was adopted by the Company on January 1, 2018 using the modified retrospective transition method. The adoption of ASC 606 resulted in an adjustment to retained earnings in our consolidated balance sheet for the cumulative effect of applying the standard, which included costs incurred to obtain a contract, as well as presentation changes in our statements of income, including the classification of certain amounts previously classified as merchant commissions and processing expense net with revenues. As a result of the application of the modified retrospective transition method, the Company's prior period results within its Form 10-K and quarterly reports on Form 10-Q will not be restated to reflect ASC 606.

[2] Reflects the impact of the Company's adoption of Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230), which was adopted by the Company on January 1, 2018 and applied retrospectively to results for 2017. The adoption of Topic 230 resulted in the statement of cash flows presenting the changes in the total of cash, cash equivalents and restricted cash. As a result, the Company will no longer present transfers between cash and cash equivalents and restricted cash in the statement of cash flows.