Share-Based Compensation (Components Of Share-Based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	4 Months Ended
	Jan. 19, 2014	Jan. 20, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3,801	$ 4,062
Allocated Share-based Compensation Expense	3,801	4,062
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	1,289	1,890
Performance-Vested Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	1,497	1,117
Nonvested Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	173	134
Nonvested Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 842	$ 921