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Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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