Other Assets - Rollforward of Capitalized Maintenance Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Capitalized Maintenance Expense [Roll Forward]
Balance at Beginning of Year	$ 147,521	$ 196,641	$ 228,511
Cost Deferred	216,762	25,401	41,899
Amortization	(74,906)	(74,521)	(73,769)
Balance at End of Year	$ 289,377	$ 147,521	$ 196,641