Debt - Schedule of Debt (Details) - USD ($)	Dec. 02, 2023	Sep. 02, 2023	Jul. 31, 2016
Debt Instrument [Line Items]
Long-Term Note Payable	$ 4,750,000	$ 4,750,000
Financing arrangements	1,336,000	127,000
Obligations under finance leases	329,000	475,000
Less: unamortized debt issuance costs	(937,000)	(1,026,000)
Total debt, including obligations under finance leases	538,478,000	454,326,000
Less: current portion	(244,048,000)	(229,935,000)
Long-term debt including obligations under finance leases	294,430,000	224,391,000
Finance lease, liability, current	135,000	249,000
Unamortized debt issuance costs, current	348,000	351,000
Committed Bank Facility
Debt Instrument [Line Items]
Credit facility	120,000,000	50,000,000
Uncommitted Bank Facilities
Debt Instrument [Line Items]
Short-term debt	193,000,000	180,000,000
Financing Arrangement
Debt Instrument [Line Items]
Financing obligations, current	1,261,000	37,000
Senior Notes Series B | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000,000	100,000,000	$ 100,000,000
Interest rate	2.90%		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	$ 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	$ 50,000,000
Interest rate	2.60%		2.60%
Series 2019A notes, due March 5, 2024 | Private Placement Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000,000	50,000,000
Financing obligations, current	$ 50,000	$ 50,000
Interest rate	2.40%	2.40%