Stock-Based Compensation (Details 9) (Employee stock purchase plan, USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 28, 2012		Jul. 30, 2011		Jul. 28, 2012		Jul. 30, 2011
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense before the recognized income tax benefit (1)	$ 9	[1]	$ 7	[1]	$ 21	[1]	$ 19	[1]
Income tax benefit (2)	$ 3	[2]	$ 3	[2]	$ 8	[2]	$ 7	[2]

[1] Amounts are representative of the 15% discount employees are provided for purchases under the employee stock purchase plan.

[2] Income tax benefit was calculated using an adjusted effective tax rate. The adjusted rate removes the tax effects from the favorable resolution of certain tax positions.