Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans Employee Benefit Plans - Additional Information (Details)

v3.23.3
Employee Benefit Plans Employee Benefit Plans - Additional Information (Details) - USD ($)
 12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Deferred Compensation Arrangement with Individual, Compensation Expense $ 900,000 $ 700,000 $ 1,200,000
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage 40.00%    
Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage 60.00%    
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage   50.00%  
Other Postretirement Benefit Plan, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation $ 1,700,000 $ 1,900,000  
Foreign Defined Benefit Plan, Net Periodic Benefit Cost (100,000)   (200,000)
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 200,000    
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate 7.00%    
Defined Benefit Plan Health Care Cost Trend Rate In Future Period 5.00%    
Other Current Liabilities and Other Long-term Liabilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Deferred Compensation Liability, Current and Noncurrent $ 11,000,000 12,900,000  
401(k) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%    
Defined Contribution Plan, Cost $ 2,100,000 2,200,000 1,100,000
Maximum Percentage Of Core Contributions Made By Employer 3.00%    
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 0.50    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount 1    
Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 1,000,000 1,100,000  
Defined Contribution Plan, Cost 200,000 200,000 100,000
Domestic Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Amount of benefits expected to be paid in fiscal 2023 2,900,000    
Amount of benefits expected to be paid in fiscal 2024 3,000,000    
Amount of benefits expected to be paid in fiscal 2025 3,000,000    
Amount of benefits expected to be paid in, fiscal 2026 3,000,000    
Amount of benefits expected to be paid fiscal 2027 through fiscal 2032 13,400,000    
Defined Benefit Plan, Benefit Obligation 33,204,000 37,135,000 47,147,000
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ 588,000 $ 324,000 $ 868,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.40% 4.75% 2.55%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 400,000    
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax (16,900,000) $ (18,300,000)  
Defined Benefit Plan, Expected Amortization, Next Fiscal Year $ 900,000    
Defined Benefit Plan, Expected Long Term Rate Of Returns On Assets Assumption 5.70%    
Defined Benefit Plan, Plan Assets, Benefits Paid $ 3,289,000 2,980,000  
Defined Benefit Plan, Plan Assets, Contributions by Employer 108,000 108,000  
Amount of benefits expected to be paid in, fiscal 2025 2,900,000    
Foreign Plan Member      
Defined Benefit Plan Disclosure [Line Items]      
Amount of benefits expected to be paid in fiscal 2023 300,000    
Amount of benefits expected to be paid in fiscal 2024 300,000    
Amount of benefits expected to be paid in fiscal 2025 300,000    
Amount of benefits expected to be paid in, fiscal 2026 300,000    
Amount of benefits expected to be paid fiscal 2027 through fiscal 2032 2,200,000    
Defined Benefit Plan, Benefit Obligation 8,085,000 8,017,000 $ 14,421,000
Foreign Defined Benefit Plan, Net Periodic Benefit Cost $ 171,000 $ 193,000 $ 110,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 4.30% 3.60%  
Defined Benefit Plan, Expected Long Term Rate Of Returns On Assets Assumption 3.70%    
Defined Benefit Plan, Plan Assets, Benefits Paid $ 469,000 $ 680,000  
Defined Benefit Plan, Plan Assets, Contributions by Employer 286,000 $ 44,000  
Amount of benefits expected to be paid in, fiscal 2025 $ 400,000    
Minimum | Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan Employer Contribution Percentage 3.00%    
Maximum | Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan Employer Contribution Percentage 6.00%