Share-Based Compensation (Total Cost Of Share-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 01, 2012	Nov. 26, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 473	$ 1,191
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	346	925
Unvested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	88	80
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost		168
Compensation Cost Of The ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	17	18
Fully Vested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 22