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Revenue from Customers - Backlog By Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Backlog | $ 1,493,115 | $ 1,175,388
Transportation Solutions |  |
Segment Reporting Information [Line Items] |  |
Backlog | 963,267 | 898,183
E-Infrastructure Solutions |  |
Segment Reporting Information [Line Items] |  |
Backlog | 432,613 | 192,049
Building Solutions |  |
Segment Reporting Information [Line Items] |  |
Backlog | $ 97,235 | $ 85,156

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