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Revenue Recognition - Schedule of Revenue by Contract Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Contract revenues	$ 3,643,905	$ 3,008,542	$ 2,498,289
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	$ 2,375,036	$ 1,886,716	$ 1,523,338
Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	65.20%	62.70%	61.00%
Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 641,802	$ 553,990	$ 443,536
Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	17.60%	18.40%	17.70%
T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 627,067	$ 567,836	$ 531,415
T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	17.20%	18.90%	21.30%
T&D
Disaggregation of Revenue [Line Items]
Contract revenues	$ 2,089,196	$ 1,745,792	$ 1,301,587
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	$ 1,100,273	$ 835,288	$ 559,861
T&D | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	52.70%	47.80%	43.00%
T&D | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 549,221	$ 475,276	$ 369,710
T&D | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	26.30%	27.20%	28.40%
T&D | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 439,702	$ 435,228	$ 372,016
T&D | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	21.00%	25.00%	28.60%
C&I
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,554,709	$ 1,262,750	$ 1,196,702
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	$ 1,274,763	$ 1,051,428	$ 963,477
C&I | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	82.00%	83.30%	80.50%
C&I | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 92,581	$ 78,714	$ 73,826
C&I | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	6.00%	6.20%	6.20%
C&I | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 187,365	$ 132,608	$ 159,399
C&I | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	12.00%	10.50%	13.30%

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