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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

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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+ References

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