Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jul. 28, 2012
item
Jul. 30, 2011
Income Taxes    
Effective income tax rate (as a percent) 34.20% 38.00%
Valuation allowance   $ 0.7
Number of states in which ability to utilize tax credits is no longer more likely than not 1