Business, Basis of Presentation and Significant Accounting Policies - Goodwill and Indefinite-Lived Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) yr reportingComponent reportingUnit	Dec. 31, 2022 USD ($) yr reportingUnit	Dec. 31, 2021 USD ($) yr reportingUnit
Goodwill [Line Items]
Goodwill	$ 2,126,366	$ 2,045,041	$ 1,520,600
Goodwill
Goodwill [Line Items]
Discount rate sensitivity analysis, spread on discount rate for which evaluation was completed (percentage)	1.00%	1.00%	1.00%
Terminal Growth Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input	0.030	0.030
Discount Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input		0.130
Maximum | Terminal Growth Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input			0.030
Maximum | Number of Years of Discounted Cash Flows
Goodwill [Line Items]
Goodwill impairment testing, measurement input | yr	9	9	9
Maximum | Discount Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input	0.140		0.150
Minimum | Terminal Growth Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input			0.025
Minimum | Number of Years of Discounted Cash Flows
Goodwill [Line Items]
Goodwill impairment testing, measurement input | yr	6	5	5
Minimum | Discount Rate
Goodwill [Line Items]
Goodwill impairment testing, measurement input	0.105		0.105
Clean Energy and Infrastructure, Communications and Oil And Gas
Goodwill [Line Items]
Goodwill impairment testing, number of reporting units | reportingUnit	1
Oil and Gas
Goodwill [Line Items]
Goodwill impairment testing, number of reporting units | reportingUnit	1	4	4
Goodwill	$ 466,700	$ 465,500	$ 436,600
Oil and Gas | One Reporting Unit
Goodwill [Line Items]
Goodwill		$ 37,500
Goodwill impairment testing, reporting unit, percentage of estimated fair value in excess of carrying value (percentage)		14.00%
Power Delivery
Goodwill [Line Items]
Number of reporting components | reportingComponent	3
Goodwill impairment testing, number of reporting units | reportingUnit	1	1
Goodwill	$ 270,800	$ 270,100	$ 303,400
Clean Energy and Infrastructure
Goodwill [Line Items]
Goodwill impairment testing, number of reporting units | reportingUnit	3	1	1
Goodwill	$ 742,000	$ 703,300	$ 166,100
Communications
Goodwill [Line Items]
Goodwill impairment testing, number of reporting units | reportingUnit			3
Goodwill	$ 646,900	$ 606,100	$ 614,500