Acquisitions, Goodwill, and Other Intangible Assets, Net - Rollforward of Goodwill by Segment (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Goodwill [Line Items]
Goodwill		$ 2,161,700
Accumulated impairment loss		(116,700)
Goodwill, net	$ 2,118,866	2,045,041
Goodwill [Roll Forward]
Goodwill, net, beginning balance	2,045,041
Additions from new business combinations	32,600
Goodwill, measurement period adjustments	41,300
Currency translation adjustments	(0)
Goodwill, net, ending balance	2,118,866
Deferred Tax Liabilities
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	(38,000)
Contingent Liabilities
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	29,000
Property And Equipment
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	7,000
Depreciation Expense
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	6,000
Revenues
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	35,000
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization
Goodwill [Roll Forward]
Goodwill, measurement period adjustments	8,000
Communications
Goodwill [Line Items]
Goodwill		606,100
Accumulated impairment loss		0
Goodwill, net	638,100	606,100
Goodwill [Roll Forward]
Goodwill, net, beginning balance	606,100
Additions from new business combinations	32,600
Goodwill, measurement period adjustments	(600)
Currency translation adjustments	0
Goodwill, net, ending balance	638,100
Clean Energy and Infrastructure
Goodwill [Line Items]
Goodwill		703,300
Accumulated impairment loss		0
Goodwill, net	743,800	703,300
Goodwill [Roll Forward]
Goodwill, net, beginning balance	703,300
Additions from new business combinations	0
Goodwill, measurement period adjustments	40,500
Currency translation adjustments	0
Goodwill, net, ending balance	743,800
Oil and Gas
Goodwill [Line Items]
Goodwill		582,200
Accumulated impairment loss		(116,700)
Goodwill, net	466,300	465,500
Goodwill [Roll Forward]
Goodwill, net, beginning balance	465,500
Additions from new business combinations	0
Goodwill, measurement period adjustments	800
Currency translation adjustments	(0)
Goodwill, net, ending balance	466,300
Power Delivery
Goodwill [Line Items]
Goodwill		270,100
Accumulated impairment loss		0
Goodwill, net	270,700	$ 270,100
Goodwill [Roll Forward]
Goodwill, net, beginning balance	270,100
Additions from new business combinations	0
Goodwill, measurement period adjustments	600
Currency translation adjustments	0
Goodwill, net, ending balance	$ 270,700