Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 3,468,011	$ 3,508,360
Accumulated Amortization	(1,352,129)	(1,166,478)
Net Carrying Amount	2,115,882	2,341,882
Trade names and trademarks—indefinite lived
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	475,376	496,306
Net Carrying Amount	$ 475,376	496,306
Customer and vendor agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	17 years 4 months 24 days
Gross Carrying Amounts	$ 2,671,104	2,698,327
Accumulated Amortization	(1,105,702)	(943,537)
Net Carrying Amount	$ 1,565,402	1,754,790
Trade names and trademarks—other
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	11 years 7 months 6 days
Gross Carrying Amounts	$ 7,041	5,384
Accumulated Amortization	(3,431)	(2,877)
Net Carrying Amount	$ 3,610	2,507
Software
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	6 years 3 months 18 days
Gross Carrying Amounts	$ 248,686	242,783
Accumulated Amortization	(194,187)	(180,839)
Net Carrying Amount	$ 54,499	61,944
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	$ 65,804	65,560
Accumulated Amortization	(48,809)	(39,225)
Net Carrying Amount	$ 16,995	$ 26,335