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Revenue from Customers - Revenue Disaggregation (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]
Revenues	$ 582,822	$ 522,325	$ 1,023,182	$ 925,904
Lump-Sum
Disaggregation of Revenue [Line Items]
Revenues	274,701	294,815	498,862	531,514
Fixed-Unit Price
Disaggregation of Revenue [Line Items]
Revenues	221,297	151,326	352,158	264,189
Residential and Other
Disaggregation of Revenue [Line Items]
Revenues	86,824	76,184	172,162	130,201
Transportation Solutions Revenues | Heavy Highway
Disaggregation of Revenue [Line Items]
Revenues	161,863	113,310	255,240	180,576
Transportation Solutions Revenues | Aviation
Disaggregation of Revenue [Line Items]
Revenues	22,634	18,310	40,774	31,746
Transportation Solutions Revenues | Other Services
Disaggregation of Revenue [Line Items]
Revenues	48,278	19,468	85,730	49,905
Building Solutions Revenues | Residential
Disaggregation of Revenue [Line Items]
Revenues	84,682	73,413	168,451	127,127
Building Solutions Revenues | Commercial
Disaggregation of Revenue [Line Items]
Revenues	24,053	37,676	47,199	70,562
Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	582,822		1,023,182
Operating Segments | E-Infrastructure Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	241,312	260,148	425,788	465,988
Operating Segments | Transportation Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	232,775	151,088	381,744	262,227
Operating Segments | Building Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 108,735	$ 111,089	$ 215,650	$ 197,689

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