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Revenue Recognition - Schedule of revenue by market type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Contract revenues	$ 815,562	$ 811,616
Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%
T&D
Disaggregation of Revenue [Line Items]
Contract revenues	$ 490,395	$ 445,324
T&D | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%
T&D | Transmission
Disaggregation of Revenue [Line Items]
Contract revenues	$ 313,926	$ 298,098
T&D | Transmission | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	38.50%	36.70%
T&D | Distribution
Disaggregation of Revenue [Line Items]
Contract revenues	$ 176,469	$ 147,226
T&D | Distribution | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	21.60%	18.20%
C&I
Disaggregation of Revenue [Line Items]
Contract revenues	$ 325,167	$ 366,292
C&I | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%
C&I | Electrical construction
Disaggregation of Revenue [Line Items]
Contract revenues	$ 325,167	$ 366,292
C&I | Electrical construction | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	39.90%	45.10%

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