Goodwill and Other Intangibles - Schedule of Other Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 3,740,692	$ 3,468,011
Accumulated Amortization	(1,371,235)	(1,352,129)
Net Carrying Amount	2,369,457	2,115,882
Trade names and trademarks—indefinite lived
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	450,203	475,376
Net Carrying Amount	$ 450,203	475,376
Customer and vendor relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	15 years 10 months 24 days
Gross Carrying Amounts	$ 2,959,128	2,671,104
Accumulated Amortization	(1,127,206)	(1,105,702)
Net Carrying Amount	$ 1,831,922	1,565,402
Trade names and trademarks—other
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	6 years 3 months 18 days
Gross Carrying Amounts	$ 12,084	7,041
Accumulated Amortization	(4,424)	(3,431)
Net Carrying Amount	$ 7,660	3,610
Software
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	5 years 7 months 6 days
Gross Carrying Amounts	$ 258,917	248,686
Accumulated Amortization	(193,658)	(194,187)
Net Carrying Amount	$ 65,259	54,499
Non-compete agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	3 years 10 months 24 days
Gross Carrying Amounts	$ 60,360	65,804
Accumulated Amortization	(45,947)	(48,809)
Net Carrying Amount	$ 14,413	$ 16,995