Earnings Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Apr. 28, 2012
Apr. 30, 2011
Income    
Basic EPS, Income $ 37,809 $ 33,469
Effect of dilutive stock options and non-vested shares, Income 0 0
Diluted EPS, Income $ 37,809 $ 33,469
Weighted Average Shares    
Basic EPS, weighted average shares 47,219 46,748
Effect of dilutive stock options and non-vested shares, weighted average shares 378 516
Diluted EPS, weighted average shares 47,597 47,264
Per Share Amount    
Basic EPS, per share $ 0.80 $ 0.72
Effect of dilutive stock options and non-vested shares, per share $ (0.01) $ (0.01)
Diluted EPS, per share $ 0.79 $ 0.71