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Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Apr. 30, 2016
May. 02, 2015
Basic Earnings per Share:    
Net income $ 10,661 $ 10,396
Amount allocated to participating securities (213) (195)
Net income available for basic common shares and basic earnings per share $ 10,448 $ 10,201
Net income available for basic common shares and basic earnings per share, Shares 18,775 19,588
Net income available for basic common shares and basic earnings per share, Per Share Amount $ 0.56 $ 0.52
Diluted Earnings per Share:    
Net income $ 10,661 $ 10,396
Amount allocated to participating securities (213) (195)
Adjustment for dilutive potential common shares $ 0 $ 0
Adjustment for dilutive potential common shares, Shares 5 13
Net income available for diluted common shares and diluted earnings per share $ 10,448 $ 10,201
Net income available for diluted common shares and diluted earnings per share, Shares 18,780 19,601
Net income available for diluted common shares and diluted earnings per share, Per Share Amount $ 0.56 $ 0.52