Asset Impairments and Other Charges and Discontinued Operations (Details ) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				3 Months Ended	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012	Apr. 30, 2011	Jul. 28, 2012 Facility Shutdown Costs [Member]	Jan. 28, 2012 Facility Shutdown Costs [Member]
Accrued Provision for Discontinued Operations
Balance at beginning of period								$ 15,035
Additional provision	67	1,224	360	1,524			360	1,692
Charges and adjustments, net							(1,099)	(4,210)
Balance at end of period							11,778	12,517
Current provision for discontinued operations	7,511		7,511		8,250	9,308	7,511
Total Noncurrent Provision for Discontinued Operations	$ 4,267		$ 4,267		$ 4,267	$ 4,363	$ 4,267