Debt - Schedule of Debt (Details) - USD ($)	Mar. 04, 2023	Sep. 03, 2022	Jul. 31, 2016
Debt Instrument [Line Items]
Long-Term Note Payable	$ 4,750,000	$ 4,750,000
Financing arrangements	531,000	88,000
Obligations under finance leases	640,000	1,180,000
Less: unamortized debt issuance costs	(1,222,000)	(1,426,000)
Total debt, including obligations under finance leases	549,699,000	794,592,000
Less: current portion	(275,758,000)	(325,680,000)
Long-term debt including obligations under finance leases	273,941,000	468,912,000
Finance lease, liability, current	605,000	996,000
Unamortized debt issuance costs, current	378,000	404,000
Financing obligations, current		88,000
Committed Bank Facility
Debt Instrument [Line Items]
Credit facility	50,000,000	245,000,000
Uncommitted Bank Facilities
Debt Instrument [Line Items]
Short-term debt	200,000,000	200,000,000
Senior Notes Series A \| Private Placement Debt
Debt Instrument [Line Items]
Principal amount	$ 75,000,000	$ 75,000,000
Interest rate	2.65%	2.65%	2.65%
Long-term debt, current maturities	$ 75,000
Financing obligations, current		$ 75,000
Senior Notes Series B \| Private Placement Debt
Debt Instrument [Line Items]
Principal amount	$ 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]
Principal 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]
Principal amount	$ 50,000,000	50,000,000
Interest rate	2.60%		2.60%
Senior notes due January 12, 2023 \| Private Placement Debt
Debt Instrument [Line Items]
Principal amount	$ 0	$ 50,000,000
Interest rate	3.04%	3.04%
Financing obligations, current		$ 50,000,000
Series 2019A notes, due March 5, 2024 \| Private Placement Debt
Debt Instrument [Line Items]
Principal amount	$ 50,000,000	$ 50,000,000
Interest rate	2.40%

Interest free short-term borrowings.

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Financing obligations, current

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Amount of short-term and long-term debt and lease obligation.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, before accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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