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Revenue from Customers - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 510,568	$ 401,666	$ 920,888	$ 716,982
Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	510,568	401,666	920,888	716,982
E-Infrastructure Solutions Backlog | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	233,548	123,743	402,475	220,315
Transportation Solutions Revenues | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	191,381	203,153	351,880	350,207
Transportation Solutions Revenues | Heavy Highway
Disaggregation of Revenue [Line Items]
Revenues	139,624	139,189	252,369	238,705
Transportation Solutions Revenues | Aviation
Disaggregation of Revenue [Line Items]
Revenues	18,934	36,754	36,517	63,976
Transportation Solutions Revenues | Water Containment and Treatment
Disaggregation of Revenue [Line Items]
Revenues	17,117	16,208	37,004	30,427
Transportation Solutions Revenues | Other
Disaggregation of Revenue [Line Items]
Revenues	15,706	11,002	25,990	17,099
Building Solutions Backlog - Commercial | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	85,639	74,770	166,533	146,460
Building Solutions Backlog - Commercial | Residential
Disaggregation of Revenue [Line Items]
Revenues	60,471	46,609	114,741	90,783
Building Solutions Backlog - Commercial | Commercial
Disaggregation of Revenue [Line Items]
Revenues	25,168	28,161	51,792	55,677
Fixed-Unit Price
Disaggregation of Revenue [Line Items]
Revenues	180,408	225,886	336,718	403,434
Lump-Sum
Disaggregation of Revenue [Line Items]
Revenues	267,274	127,416	465,142	218,571
Residential and Other
Disaggregation of Revenue [Line Items]
Revenues	$ 62,886	$ 48,364	$ 119,028	$ 94,977

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