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Revenue Recognition - Schedule of Revenue by Contract Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Contract revenues	$ 3,362,290	$ 3,643,905	$ 3,008,542
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	$ 2,027,296	$ 2,375,036	$ 1,886,716
Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	60.30%	65.20%	62.70%
Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 676,596	$ 641,802	$ 553,990
Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	20.10%	17.60%	18.40%
T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 658,398	$ 627,067	$ 567,836
T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	19.60%	17.20%	18.90%
T&D
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,880,501	$ 2,089,196	$ 1,745,792
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	$ 824,643	$ 1,100,273	$ 835,288
T&D | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	43.90%	52.70%	47.80%
T&D | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 596,089	$ 549,221	$ 475,276
T&D | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	31.70%	26.30%	27.20%
T&D | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 459,769	$ 439,702	$ 435,228
T&D | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	24.40%	21.00%	25.00%
C&I
Disaggregation of Revenue [Line Items]
Contract revenues	$ 1,481,789	$ 1,554,709	$ 1,262,750
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	$ 1,202,653	$ 1,274,763	$ 1,051,428
C&I | Fixed price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	81.20%	82.00%	83.30%
C&I | Unit price
Disaggregation of Revenue [Line Items]
Contract revenues	$ 80,507	$ 92,581	$ 78,714
C&I | Unit price | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	5.40%	6.00%	6.20%
C&I | T&E
Disaggregation of Revenue [Line Items]
Contract revenues	$ 198,629	$ 187,365	$ 132,608
C&I | T&E | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk	13.40%	12.00%	10.50%

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