Annual report pursuant to Section 13 and 15(d)

Reconciliation of Income Taxes at Federal Statutory Rate to Effective Tax Rate (Details)

v3.21.2
Reconciliation of Income Taxes at Federal Statutory Rate to Effective Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]        
Federal statutory rate 21.00% 21.00% 21.00%  
State income taxes, net of federal effect (0.20%) (0.60%) (4.00%)  
Net effects of foreign tax rate differential and credits 2.80% 38.70% 20.60%  
Effective Income Tax Rate Reconciliation, Foreign derived intangible income deduction, Percent (3.20%) 0.00% (9.30%)  
Effective Income Tax Rate Reconciliation, Compensation Adjustment 3.10% 6.60% 4.40%  
Impairment and divestiture charges 1.60% 3.30% 19.30%  
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent 7.10% (8.10%) 3.90%  
Changes in liability for unrecognized tax benefits (18.50%) (5.30%) 4.10%  
Effective Income Tax Rate Reconciliation, U.S. Legislative changes (9.80%) (32.50%) (31.10%)  
Net Benefit Taxable Liquidations of Subsidiaries Percent 0.00% 52.60% 0.00%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 1.20% 7.40% 18.20%  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent (3.40%) (9.00%) 1.70%  
Effective Income Tax Rate Reconciliation, Audits and Adjustments 8.00% (27.40%) 10.00%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Percent (1.80%) (11.50%) (5.20%)  
Other items 0.70% (6.00%) 3.30%  
Effective income tax rate 8.60% 29.20% 56.90%  
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount $ 4,600 $ 4,000 $ 3,500  
Impairment and divestiture (benefit) charges 6,198 (3,159) 22,827 $ 22,800
Impairment, Non-Deductible for Income Tax Purposes 3,500 300 14,000  
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense 4,900 9,400 1,700  
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction 9,100 12,300 2,900  
Net Benefit, Taxable Liquidations of Foreign Subsidiaries   4,100    
Effective Income Tax Rate Reconciliation, Withholding Tax, Foreign, Amount 1,700 5,400 2,600  
Non-Cash Impairment charges - foreign earnings 1,500 (600) 13,800  
Effective Income Tax Rate Reconciliation audits and adjustments, amount $ 3,500 $ 2,200 $ 1,900