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 ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Aug. 01, 2015
Aug. 02, 2014
Earnings Per Share [Abstract]        
Numerator for diluted net income per share - net income $ 74,169 $ 60,794 $ 141,115 $ 110,747
Denominator for basic net income per share - weighted-average common shares 64,087 64,349 64,134 64,311
Dilutive effect of stock options and non-vested stock 323 287 350 307
Denominator for diluted net income per share 64,410 64,636 64,484 64,618
Net income per common share:        
Basic $ 1.16 $ 0.94 $ 2.20 $ 1.72
Diluted $ 1.15 $ 0.94 $ 2.19 $ 1.71