Segment Reporting - Changes in Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 6,187,643	$ 5,726,650
Goodwill acquired	516,441	280,874
Goodwill acquisition adjustments		(2)
Impact of changes in foreign currency	(129,224)	(989)
Goodwill, Ending Balance	6,574,860	6,006,533
Southern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,588,467	1,532,215
Goodwill acquired	83,970	2,970
Goodwill acquisition adjustments		0
Impact of changes in foreign currency		0
Goodwill, Ending Balance	1,672,437	1,535,185
Eastern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,607,723	1,374,577
Goodwill acquired	182,697	169,561
Goodwill acquisition adjustments		0
Impact of changes in foreign currency		0
Goodwill, Ending Balance	1,790,420	1,544,138
Western [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	539,732	442,862
Goodwill acquired	8,060	60,999
Goodwill acquisition adjustments		0
Impact of changes in foreign currency		0
Goodwill, Ending Balance	547,792	503,861
Central [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	892,209	824,204
Goodwill acquired	73,788	47,344
Goodwill acquisition adjustments		0
Impact of changes in foreign currency		0
Goodwill, Ending Balance	965,997	871,548
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,559,512	1,552,792
Goodwill acquired	167,926
Goodwill acquisition adjustments		(2)
Impact of changes in foreign currency	(129,224)	(989)
Goodwill, Ending Balance	$ 1,598,214	$ 1,551,801