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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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