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Supplemental Executive Retirement Plan (Details) (USD $)
 3 Months Ended 9 Months Ended
Oct. 27, 2012
Oct. 29, 2011
Oct. 27, 2012
Oct. 29, 2011
Jan. 28, 2012
Components of net periodic benefit cost          
Interest cost $ 598,000 $ 662,000 $ 1,794,000 $ 1,978,000  
Net amortization of unrecognized prior service cost 155,000 155,000 465,000 785,000  
Net amortization of actuarial losses 835,000 458,000 2,505,000 1,592,000  
Curtailment expense       1,242,000  
Net periodic defined benefit pension cost 1,588,000 1,275,000 4,764,000 5,597,000  
Cash surrender values of the insurance policies held in a rabbi trust 46,100,000   46,100,000   38,400,000
Gain (loss) as a result of the change in value of the insurance policy investments, included in other income and expense $ 900,000 $ (700,000) $ 1,600,000 $ (300,000)