Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 03, 2016	Aug. 29, 2015	Aug. 30, 2014
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 13,428	$ 14,504	$ 16,329
Maximum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	2026
Related Party Commitments [Member]
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 1,044	$ 2,401	$ 2,297
Equipment And Automobile [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	2020