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Overview and Summary of Significant Accounting Policies - Unsatisfied Performance Obligation (Details) $ in Millions | Sep. 30, 2023 USD ($)
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Engineered Structures | Utility, wind, and related structures |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Unsatisfied performance obligations, Amount | $ 1,450.8
Revenue, remaining performance obligation expected to be delivered in current year | 15.00%
Revenue Remaining Performance Obligation Percentage Year 2 | 33.00%
Transportation Products | Inland barges |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Unsatisfied performance obligations, Amount | $ 240.4
Revenue, remaining performance obligation expected to be delivered in current year | 26.00%

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- 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 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 + Details
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