Business Segments (Narrative) (Details) - segment	3 Months Ended		6 Months Ended
Business Segments (Narrative) (Details) - segment	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]
Number of reportable segments			3
Revenue Benchmark \| Customer Concentration Risk \| Civil, Building, And Specialty Contractors \| Customer One
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]
Concentration risk (as a percent)	10.20%	15.30%	11.60%	15.40%
Revenue Benchmark \| Customer Concentration Risk \| Civil, Building, And Specialty Contractors \| Customer Two
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]
Concentration risk (as a percent)	14.40%		13.50%	10.20%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.