Quarterly report pursuant to Section 13 or 15(d)

Net income per common share - Net Income Per Basic and Diluted Share (Detail)

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Net income per common share - Net Income Per Basic and Diluted Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
May 04, 2013
Apr. 28, 2012
Earnings Per Share [Abstract]    
Net income $ 41,826 $ 34,868
Denominator for basic net income per share - weighted-average common shares 63,842 62,496
Dilutive effect of stock options and non-vested stock 653 1,576
Denominator for diluted net income per share 64,495 64,072
Net income per common share:    
Basic $ 0.66 $ 0.56
Diluted $ 0.65 $ 0.54