Overview and Summary of Significant Accounting Policies - Unsatisfied Performance Obligation (Details) - Engineered Structures $ in Millions |
Jun. 30, 2026
USD ($)
|
|---|---|
| Utility and related structures | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Unsatisfied performance obligations, Amount | $ 648.1 |
| Revenue, remaining performance obligation expected to be delivered in current year | 71.00% |
| Revenue Remaining Performance Obligation Percentage Year 2 | 20.00% |
| Wind towers | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Unsatisfied performance obligations, Amount | $ 537.4 |
| Revenue, remaining performance obligation expected to be delivered in current year | 28.00% |
| Revenue Remaining Performance Obligation Percentage Year 2 | 66.00% |