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 6 Months Ended
Aug. 03, 2013
Jul. 28, 2012
Aug. 03, 2013
Jul. 28, 2012
Earnings Per Share [Abstract]        
Net income $ 44,911 $ 34,998 $ 86,737 $ 69,866
Denominator for basic net income per share - weighted-average common shares 63,834 63,070 63,838 62,782
Dilutive effect of stock options and non-vested stock 497 1,223 524 1,420
Denominator for diluted net income per share 64,331 64,293 64,362 64,202
Net income per common share:        
Basic $ 0.70 $ 0.55 $ 1.36 $ 1.11
Diluted $ 0.70 $ 0.54 $ 1.35 $ 1.09