Acquisitions, Goodwill, and Other Intangible Assets, Net - Rollforward of Goodwill by Segment (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Goodwill [Line Items]
Goodwill		$ 1,645,300
Accumulated impairment loss		(124,700)
Goodwill, net	$ 1,493,843	1,520,575
Goodwill [Roll Forward]
Goodwill, net, beginning balance	1,520,575
Goodwill, acquired during period	14,500
Goodwill, measurement period adjustments	(39,900)
Goodwill, currency translation adjustments	(1,400)
Goodwill, net, ending balance	1,493,843	1,520,575
HMG
Goodwill [Line Items]
Goodwill, net		71,400
Goodwill [Roll Forward]
Goodwill, net, beginning balance	71,400
Goodwill, net, ending balance		71,400
Communications
Goodwill [Line Items]
Goodwill		614,500
Accumulated impairment loss		0
Goodwill, net	606,000	614,500
Goodwill [Roll Forward]
Goodwill, net, beginning balance	614,500
Goodwill, acquired during period	2,900
Goodwill, measurement period adjustments	(11,400)
Goodwill, currency translation adjustments	0
Goodwill, net, ending balance	606,000	614,500
Communications | HMG
Goodwill [Roll Forward]
Goodwill, period increase (decrease)		13,000
Clean Energy and Infrastructure
Goodwill [Line Items]
Goodwill		166,100
Accumulated impairment loss
Goodwill, net	174,100	166,100
Goodwill [Roll Forward]
Goodwill, net, beginning balance	166,100
Goodwill, acquired during period	5,900
Goodwill, measurement period adjustments	2,100
Goodwill, currency translation adjustments	0
Goodwill, net, ending balance	174,100	166,100
Oil and Gas
Goodwill [Line Items]
Goodwill		561,300
Accumulated impairment loss		(124,700)
Goodwill, net	445,500	436,600
Goodwill [Roll Forward]
Goodwill, net, beginning balance	436,600
Goodwill, acquired during period	4,100
Goodwill, measurement period adjustments	6,200
Goodwill, currency translation adjustments	(1,400)
Goodwill, net, ending balance	445,500	436,600
Oil and Gas | HMG
Goodwill [Roll Forward]
Goodwill, period increase (decrease)		10,400
Power Delivery
Goodwill [Line Items]
Goodwill		303,400
Accumulated impairment loss		0
Goodwill, net	268,200	303,400
Goodwill [Roll Forward]
Goodwill, net, beginning balance	303,400
Goodwill, acquired during period	1,600
Goodwill, measurement period adjustments	(36,800)
Goodwill, currency translation adjustments	0
Goodwill, net, ending balance	$ 268,200	303,400
Power Delivery | HMG
Goodwill [Roll Forward]
Goodwill, period increase (decrease)		$ (23,400)