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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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