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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Disaggregation of Revenue | Revenues Total revenues for the Company's reportable segments are presented below:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| ($ in millions)
Aggregates and specialty materials | $ | 977.9 |  |  | $ | 879.9 |  |  | $ | 821.4 |
Construction site support | 127.2 |  |  | 121.4 |  |  | 102.1 |
Construction Products | 1,105.1 |  |  | 1,001.3 |  |  | 923.5 |
Utility, wind, and related structures | 1,047.3 |  |  | 873.5 |  |  | 813.1 |
Storage tanks | — |  |  | — |  |  | 188.9 |
Engineered Structures | 1,047.3 |  |  | 873.5 |  |  | 1,002.0 |
Inland barges | 329.8 |  |  | 280.2 |  |  | 189.9 |
Steel components(1) | 87.8 |  |  | 153.3 |  |  | 127.4 |
Transportation Products | 417.6 |  |  | 433.5 |  |  | 317.3 |
Segment Totals before Eliminations | 2,570.0 |  |  | 2,308.3 |  |  | 2,242.8 |
Eliminations | (0.1) |  |  | (0.4) |  |  | — |
Consolidated Total | $ | 2,569.9 |  |  | $ | 2,307.9 |  |  | $ | 2,242.8 |
(1) On August 16, 2024, the Company completed the divestiture of its steel components business.
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 December 31, 2024 and the percentage of the outstanding performance obligations as of December 31, 2024 expected to be delivered during 2025:
| Unsatisfied performance obligations at |  |
| December 31, 2024 |  |
| Total Amount |  |  |  |
| (in millions) |  |  |  |
Engineered Structures: |  |  |  |  |
Utility, wind, and related structures | $ | 1,190.8 |  |  |  |  |
Transportation Products: |  |  |  |  |
Inland barges | $ | 280.1 |  |  |  |  |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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