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Savings Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Savings Plans      
Employee contribution limit per calendar year (as a percent of compensation) 100.00%    
Employer contribution limit (as a percent of compensation) 3.00%    
Company's contributions to the Savings Plan $ 1.2 $ 1.1 $ 1.1
Deferred Compensation Plan, (losses) gains related to the change in the fair value of the insurance policy investments (0.1) 0.7 3.6
Deferred compensation liability 6.8 6.5  
Deferred compensation, long-term assets $ 12.3 $ 12.3