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Business Segments (Narrative) (Details) - segment | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments |  |  | 3 |
Revenue Benchmark | Customer Concentration Risk | Civil, Building, And Specialty Contractors | Customer One |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Concentration risk, percentage | 15.30% | 19.00% | 15.40% | 18.90%
Revenue Benchmark | Customer Concentration Risk | Civil, Building, And Specialty Contractors | Customer Two |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Concentration risk, percentage |  |  | 10.20% |

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