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Segment Information - Summary of Segment's Internal Financial Reports (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Contract revenues	$ 3,643,905	$ 3,008,542	$ 2,498,289
Income from operations	129,093	114,907	118,560
General Corporate
Segment Reporting Information [Line Items]
Income from operations	(66,499)	(67,138)	(68,596)
T&D
Segment Reporting Information [Line Items]
Contract revenues	2,089,196	1,745,792	1,301,587
T&D | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	149,703	138,886	132,738
C&I
Segment Reporting Information [Line Items]
Contract revenues	1,554,709	1,262,750	1,196,702
C&I | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	$ 45,889	$ 43,159	$ 54,418

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The net result for the period of deducting operating expenses from operating revenues.

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