Commitments And Contingencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Sep. 01, 2012
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 16,329	$ 13,243	$ 11,271
Maximum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	2030
Related Party Commitments [Member]
Commitments And Contingencies [Line Items]
Rental expense, operating leases	$ 2,297	$ 2,293	$ 2,258
Equipment And Automobile [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	2019