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Overview and Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2023
Accounting Policies [Abstract] |
Unsatisfied Performance Obligations | Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of March 31, 2023 and the percentage of the outstanding performance obligations as of March 31, 2023 expected to be delivered during the remainder of 2023:
| Unsatisfied performance obligations as of March 31, 2023 |  |
| Total Amount |  | Percent expected to be delivered in 2023 |  |
| (in millions) |  |  |  |
Engineered Structures: |  |  |  |  |
Utility, wind, and related structures | $ | 1,531.4 |  |  | 29 | % |  |
Transportation Products: |  |  |  |  |
Inland barges | $ | 279.0 |  |  | 68 | % |  |
Of the remaining unsatisfied performance obligations for utility, wind, and related structures, 22% are expected to be delivered during 2024 with the remainder expected to be delivered through 2028. Substantially all of the remaining unsatisfied performance obligations for inland barges are expected to be delivered during 2024.

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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 + Details
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