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Debt And Capital Lease Obligations (Schedule Of Debt) (Details) - USD ($)		Aug. 31, 2019	Sep. 01, 2018
Debt Instrument [Line Items]
Capital lease and financing obligations		$ 3,053,000	$ 27,926,000
Less: unamortized debt issuance costs		(1,169,000)	(1,593,000)
Total debt		441,884,000	535,333,000
Less: short-term debt	[1]	(175,453,000)	(224,097,000)
Long-term debt		266,431,000	311,236,000
Committed Bank Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility			224,000,000
Uncommitted Bank Facilities [Member]
Debt Instrument [Line Items]
Revolving credit facility		155,000,000
Shelf Facility Agreement [Member]
Debt Instrument [Line Items]
Principal amount		90,000,000	90,000,000
Senior Notes Series A [Member] | Private Placement Debt [Member]
Debt Instrument [Line Items]
Principal amount		75,000,000	75,000,000
Senior Notes Series B [Member] | Private Placement Debt [Member]
Debt Instrument [Line Items]
Principal amount		100,000,000	100,000,000
Senior Notes Due June 11, 2025 [Member]
Debt Instrument [Line Items]
Principal amount		20,000,000
Senior Notes Due June 11, 2025 [Member] | Private Placement Debt [Member]
Debt Instrument [Line Items]
Principal amount		$ 20,000,000	$ 20,000,000
[1] Net of unamortized debt issuance costs expected to be amortized in the next 12 months.

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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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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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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