v3.26.1
Related party transactions - Additional Information (Detail) - Alpha Steel [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2026
Related Party Transaction [Line Items]      
Purchases from Alpha Steel $ 2.9 $ 7.6  
Ownership percentage     45.00%