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Segment Information - Summary of Segment's Internal Financial Reports (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Contract revenues	$ 3,008,542	$ 2,498,289	$ 2,247,392
Income from operations	114,907	118,560	86,545
General Corporate
Segment Reporting Information [Line Items]
Income from operations	(67,138)	(68,596)	(60,089)
T&D
Segment Reporting Information [Line Items]
Contract revenues	1,745,792	1,301,587	1,154,378
T&D | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	138,886	132,738	109,387
C&I
Segment Reporting Information [Line Items]
Contract revenues	1,262,750	1,196,702	1,093,014
C&I | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	$ 43,159	$ 54,418	$ 37,247

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