Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Allowances for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 127,917	$ 143,722	$ 165,540
Additions: Charged to Costs and Expenses	2,348	25,289	10,175
Deductions: Write-offs, Net of Recoveries	(53,638)	(41,094)	(31,993)
Balance at End of Year	76,627	127,917	143,722
Valuation allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	189,685	208,810	219,891
Additions: Charged to Costs and Expenses	9,705	18,341	11,700
Deductions: Write-offs, Net of Recoveries	(16,924)	(37,466)	(22,781)
Balance at End of Year	$ 182,466	$ 189,685	$ 208,810