Debt - Schedule of Debt (Details) - USD ($)	Mar. 01, 2025	Aug. 31, 2024
Debt Instrument [Line Items]
Long-Term Note Payable	$ 4,750,000	$ 4,750,000
Financing arrangements	527,000	640,000
Obligations under finance leases	551,000	654,000
Less: unamortized debt issuance costs	(591,000)	(780,000)
Total debt, including obligations under finance leases	538,987,000	508,764,000
Less: current portion	(234,056,000)	(229,911,000)
Total long-term debt, including obligations under finance leases	304,931,000	278,853,000
Finance lease, liability, current	207,000	199,000
Unamortized debt issuance costs, current	383,000	383,000
Committed Bank Facility
Debt Instrument [Line Items]
Amended Revolving Credit Facility	100,000,000	74,000,000
Uncommitted Bank Facilities
Debt Instrument [Line Items]
Uncommitted Credit Facilities	213,750,000	209,500,000
Financing Arrangement
Debt Instrument [Line Items]
Financing obligations, current	482,000	595,000
Senior Notes, Series B, Due July 28, 2026 | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000,000	100,000,000
Interest rate	2.90%
Senior Notes Due June 11, 2025 | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 20,000,000	$ 20,000,000
Interest rate	3.79%	3.79%
Senior notes, Due March 5, 2027 | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000,000	$ 50,000,000
Interest rate	2.60%
Senior Notes Due April 18, 2027 | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000,000	$ 50,000,000
Interest rate	5.73%