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Revenue Recognition - Schedule of revenue by market type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Contract revenues	$ 828,890	$ 888,616	$ 1,644,452	$ 1,700,232
Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%	100.00%	100.00%
T&D
Disaggregation of Revenue [Line Items]
Contract revenues	$ 458,209	$ 503,737	$ 948,604	$ 949,060
T&D | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%	100.00%	100.00%
T&D | Transmission
Disaggregation of Revenue [Line Items]
Contract revenues	$ 282,488	$ 322,272	$ 596,414	$ 620,370
T&D | Transmission | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	34.10%	36.30%	36.30%	36.50%
T&D | Distribution
Disaggregation of Revenue [Line Items]
Contract revenues	$ 175,721	$ 181,465	$ 352,190	$ 328,690
T&D | Distribution | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	21.20%	20.40%	21.40%	19.30%
C&I
Disaggregation of Revenue [Line Items]
Contract revenues	$ 370,681	$ 384,879	$ 695,848	$ 751,172
C&I | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	100.00%	100.00%	100.00%	100.00%
C&I | Electrical construction
Disaggregation of Revenue [Line Items]
Contract revenues	$ 370,681	$ 384,879	$ 695,848	$ 751,172
C&I | Electrical construction | Product concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, Percent	44.70%	43.30%	42.30%	44.20%

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