Segments and Related Information - Schedule of Financial Information by Reportable Segment - Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue (in dollars)	$ 7,951,781	$ 6,320,975	$ 7,183,188
Communications | Customer Concentration Risk | Revenue Benchmark | Utilities
Revenue:
Concentration risk, percentage of total	20.80%	15.60%	15.00%
Reportable Segments | Communications
Revenue:
Revenue (in dollars)	$ 2,551,100	$ 2,512,200	$ 2,618,800
Reportable Segments | Clean Energy and Infrastructure
Revenue:
Revenue (in dollars)	1,865,000	1,526,900	1,034,300
Reportable Segments | Oil and Gas
Revenue:
Revenue (in dollars)	2,540,500	1,789,800	3,117,200
Reportable Segments | Power Delivery
Revenue:
Revenue (in dollars)	1,016,800	506,500	413,900
Reportable Segments | Other
Revenue:
Revenue (in dollars)	0	600	200
Eliminations
Revenue:
Revenue (in dollars)	$ (21,600)	$ (15,000)	$ (1,200)