Commitments And Contingencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 01, 2012	Aug. 27, 2011	Aug. 28, 2010
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 11,271	$ 10,716	$ 9,646
Lease expiration date	2030
Related Party Commitments [Member]
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 2,258	$ 2,247	$ 2,310
Equipment And Automobile [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	2020