v3.26.3
Related Party Transactions - Additional Information (Detail) - Axis LLC - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
Related Party Transaction [Line Items]      
Percentage of ownership in entity 41.90%    
Railcar Components      
Related Party Transaction [Line Items]      
Purchases of goods from related party $ 4.9 $ 9.4 $ 8.8