Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting [Abstract]
Revenues	$ 5,483,525	$ 4,595,790	$ 10,415,706	$ 8,637,267
Operating Income (Loss)	370,709	218,872	654,738	352,123
Adjusted EBITDA	$ 444,460	$ 309,245	$ 808,582	$ 525,793
Adjusted EBITDA Margin %	8.10%	6.70%	7.80%	6.10%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,483,525	$ 4,595,790	$ 10,415,706	$ 8,637,267
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	370,709	218,872	654,738	352,123
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	13,863,266		13,863,266		$ 12,617,699
EES
Segment Reporting [Abstract]
Adjusted EBITDA	$ 235,449	$ 167,955	$ 427,865	$ 279,981
Adjusted EBITDA Margin %	10.10%	8.70%	9.70%	7.70%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,330,153	$ 1,923,011	$ 4,420,112	$ 3,643,824
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,557,228		4,557,228		4,098,335
CSS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 150,042	$ 131,139	$ 273,081	$ 221,820
Adjusted EBITDA Margin %	9.40%	9.00%	9.00%	8.20%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,601,997	$ 1,461,120	$ 3,036,172	$ 2,711,735
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,869,427		4,869,427		4,601,132
UBS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 169,035	$ 100,702	$ 305,395	$ 184,355
Adjusted EBITDA Margin %	10.90%	8.30%	10.30%	8.10%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,551,375	$ 1,211,659	$ 2,959,422	$ 2,281,708
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,689,724		3,689,724		3,266,231
Corporate Segment
Segment Reporting [Abstract]
Adjusted EBITDA	(110,066)	(90,551)	(197,759)	(160,363)
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	$ 0	0	$ 0
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 746,887		$ 746,887		$ 652,001