Share-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Feb. 01, 2013	Jan. 31, 2014	Feb. 01, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 1,426	$ 3,540	$ 4,246	$ 5,409
Nonvested Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	832	2,997	3,342	4,164
Performance-Based Market Stock Units ("MSU Grants") [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	594	543	904	1,157
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 0	$ 0	$ 0	$ 88