Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 3,508,360		$ 3,367,524
Accumulated Amortization	(1,166,478)		(959,614)
Net Carrying Amount	2,341,882	[1]	2,407,910
Trade names and trademarks—indefinite lived
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	496,306		479,555
Net Carrying Amount	$ 496,306		479,555
Customer and vendor agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	17 years
Gross Carrying Amounts	$ 2,698,327		2,625,270
Accumulated Amortization	(943,537)		(776,383)
Net Carrying Amount	$ 1,754,790		1,848,887
Trade names and trademarks—other
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	13 years 4 months 24 days
Gross Carrying Amounts	$ 5,384		2,957
Accumulated Amortization	(2,877)		(2,501)
Net Carrying Amount	$ 2,507		456
Software
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	6 years
Gross Carrying Amounts	$ 242,783		212,733
Accumulated Amortization	(180,839)		(152,416)
Net Carrying Amount	$ 61,944		60,317
Non-compete agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	4 years 1 month 6 days
Gross Carrying Amounts	$ 65,560		47,009
Accumulated Amortization	(39,225)		(28,314)
Net Carrying Amount	$ 26,335		$ 18,695

[1] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using a modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 14.