Annual report pursuant to Section 13 and 15(d)

U.S. Pension Plan Investment Allocations by Asset Category (Detail)

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U.S. Pension Plan Investment Allocations by Asset Category (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 28,530 $ 31,166  
Percentage of fair value of pension plan assets 100.00% 100.00%  
Foreign Plan Member      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 6,195 $ 6,208 $ 9,396
Defined Benefit Plan, Plan Assets, Benefits Paid 469 680  
Fixed Income Securities      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 15,928 $ 16,247  
Percentage of fair value of pension plan assets 55.80% 52.20%  
Fixed Income Securities | Corporate Bond Securities | Fair Value, Inputs, Level 2      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 0 $ 0  
Percentage of fair value of pension plan assets 0.00% 0.00%  
Fixed Income Securities | Mutual Funds | Fair Value, Inputs, Level 1      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 11,269 $ 11,395  
Percentage of fair value of pension plan assets 39.50% 36.60%  
Fixed Income Securities | US Treasury Securities | Fair Value, Inputs, Level 2      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 4,659 $ 4,852  
Percentage of fair value of pension plan assets 16.30% 15.60%  
Cash and cash equivalents | Fair Value, Inputs, Level 1      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 51 $ 0  
Percentage of fair value of pension plan assets 0.20% 0.00%  
Equity Securities | Mutual Funds | Fair Value, Inputs, Level 1      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 12,511 $ 14,888  
Percentage of fair value of pension plan assets 43.90% 47.70%  
Income Receivable      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 40 $ 31  
Percentage of fair value of pension plan assets 0.10% 0.10%