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Derivative Financial Instruments and Hedging Activities - Pretax Gains (Losses) on Derivatives Accounted for as Hedging Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Cash Flow Hedging [Member] | Commodity [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax $ 965 $ (605) $ (12,285)