Quarterly report pursuant to Section 13 or 15(d)

Net Income Per Common Share (Details)

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Net Income Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Apr. 28, 2012
Apr. 30, 2011
Net income per common share reconciliation    
Net income $ 34,868 $ 23,296
Denominator for basic net income per share - weighted-average common shares 62,496 60,554
Dilutive effect of stock options and non-vested stock 1,576 2,204
Denominator for diluted net income per share 64,072 62,758
Net income per common share:    
Basic $ 0.56 $ 0.38
Diluted $ 0.54 $ 0.37
Net income per common share (Textual) [Abstract]    
Antidilutive stock option excluded from computation of net income per common share 525 189