Debt and Capital Lease Obligations (Schedule Of Debt) (Details) - USD ($)		Sep. 02, 2017	Sep. 03, 2016
Debt Instrument [Line Items]
Capital lease and financing obligations		$ 27,829,000	$ 28,268,000
Less: unamortized debt issuance costs		(1,852,000)	(946,000)
Total Debt		532,977,000	606,822,000
Less: short-term debt	[1]	(331,986,000)	(267,050,000)
Long-term debt		200,991,000	339,772,000
New Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility		332,000,000	217,000,000
Term Loan [Member]
Debt Instrument [Line Items]
Credit Facility			187,500,000
Senior Notes Series A [Member] | Private Placement Debt [Member]
Debt Instrument [Line Items]
Private placement debt		75,000,000	75,000,000
Senior Notes Series B [Member] | Private Placement Debt [Member]
Debt Instrument [Line Items]
Private placement debt		$ 100,000,000	$ 100,000,000

[1] Net of unamortized debt issuance costs expected to be amortized in the next twelve months.