Goodwill and Other Intangibles - Schedule of Other Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 3,420,451	$ 3,508,360
Accumulated Amortization	(1,305,262)	(1,166,478)
Net Carrying Amount	2,115,189	2,341,882
Trade names and trademarks—indefinite lived
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	467,130	496,306
Net Carrying Amount	$ 467,130	496,306
Customer and vendor relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	17 years 2 months 12 days
Gross Carrying Amounts	$ 2,633,710	2,698,327
Accumulated Amortization	(1,065,679)	(943,537)
Net Carrying Amount	$ 1,568,031	1,754,790
Trade names and trademarks—other
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	11 years 4 months 24 days
Gross Carrying Amounts	$ 7,015	5,384
Accumulated Amortization	(3,244)	(2,877)
Net Carrying Amount	$ 3,771	2,507
Software
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	6 years 2 months 12 days
Gross Carrying Amounts	$ 246,478	242,783
Accumulated Amortization	(190,280)	(180,839)
Net Carrying Amount	$ 56,198	61,944
Non-compete agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Lives (Years)	4 years
Gross Carrying Amounts	$ 66,118	65,560
Accumulated Amortization	(46,059)	(39,225)
Net Carrying Amount	$ 20,059	$ 26,335