v3.26.3
Related party transactions - Additional Information (Detail) - Alpha Steel [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2025
Sep. 30, 2026
Related Party Transaction [Line Items]      
Purchases from Alpha Steel $ 5.0 $ 12.6  
Ownership percentage     45.00%