Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018		Dec. 31, 2017
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 3,371,056		$ 3,468,241
Accumulated Amortization	(855,824)		(743,284)
Net Carrying Amount	2,515,232	[1]	2,724,957
Trade names and trademarks—indefinite lived
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	481,581		499,587
Accumulated Amortization	0		0
Net Carrying Amount	$ 481,581		499,587
Customer and vendor relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	17 years 1 month 6 days
Gross Carrying Amounts	$ 2,627,119		2,698,428
Accumulated Amortization	(693,263)		(605,347)
Net Carrying Amount	$ 1,933,856		2,093,081
Trade names and trademarks—other
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	13 years 9 months 18 days
Gross Carrying Amounts	$ 2,966		2,986
Accumulated Amortization	(2,375)		(2,207)
Net Carrying Amount	$ 591		779
Software
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	5 years 10 months 24 days
Gross Carrying Amounts	$ 213,563		219,019
Accumulated Amortization	(136,173)		(116,654)
Net Carrying Amount	$ 77,390		102,365
Non-compete agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	4 years 3 months 18 days
Gross Carrying Amounts	$ 45,827		48,221
Accumulated Amortization	(24,013)		(19,076)
Net Carrying Amount	$ 21,814		$ 29,145

[1] Reflects the January 1, 2018 adoption of Accounting Standards Update 2014-09, "Revenue from Contracts with Customers (Topic 606)" and related cost capitalization guidance using the modified retrospective transition method. The adoption of Topic 606 resulted in an adjustment to retained earnings in our consolidated balance sheet for the cumulative effective 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 annual report on Form 10-K and quarterly reports on Form 10-Q will not be restated to reflect the impact of Topic 606. See footnote 1.