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Revenue Recognition - Schedule of Revenue by Contract Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Contract revenues	$ 3,008,542	$ 2,498,289	$ 2,247,392
Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	100.00%	100.00%	100.00%
Fixed price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,886,716	$ 1,523,338	$ 1,411,658
Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	62.70%	61.00%	62.80%
Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 553,990	$ 443,536	$ 415,942
Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	18.40%	17.70%	18.50%
T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 567,836	$ 531,415	$ 419,792
T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	18.90%	21.30%	18.70%
T&D
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,745,792	$ 1,301,587	$ 1,154,378
T&D | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	100.00%	100.00%	100.00%
T&D | Fixed price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 835,288	$ 559,861	$ 507,634
T&D | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	47.80%	43.00%	44.00%
T&D | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 475,276	$ 369,710	$ 338,611
T&D | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	27.20%	28.40%	29.30%
T&D | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 435,228	$ 372,016	$ 308,133
T&D | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	25.00%	28.60%	26.70%
C&I
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,262,750	$ 1,196,702	$ 1,093,014
C&I | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	100.00%	100.00%	100.00%
C&I | Fixed price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,051,428	$ 963,477	$ 904,024
C&I | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	83.30%	80.50%	82.70%
C&I | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 78,714	$ 73,826	$ 77,331
C&I | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	6.20%	6.20%	7.10%
C&I | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 132,608	$ 159,399	$ 111,659
C&I | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	10.50%	13.30%	10.20%

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