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Other Assets - Rollforward of Capitalized Maintenance Activity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Capitalized Maintenance Expense [Roll Forward]      
Balance at Beginning of Year $ 223,119 $ 289,377 $ 147,521
Cost Deferred 271,857 21,909 216,762
Amortization (94,709) (88,167) (74,906)
Balance at End of Year $ 400,267 $ 223,119 $ 289,377