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. 02, 2014
Aug. 03, 2013
Aug. 02, 2014
Aug. 03, 2013
Earnings Per Share [Abstract]        
Net income $ 60,794 $ 44,911 $ 110,747 $ 86,737
Denominator for basic net income per share - weighted-average common shares 64,349 63,834 64,311 63,838
Dilutive effect of stock options and non-vested stock 287 497 307 524
Denominator for diluted net income per share 64,636 64,331 64,618 64,362
Net income per common share:        
Basic $ 0.94 $ 0.70 $ 1.72 $ 1.36
Diluted $ 0.94 $ 0.70 $ 1.71 $ 1.35