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Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Oct. 29, 2016
Oct. 31, 2015
Oct. 29, 2016
Oct. 31, 2015
Basic Earnings per Share:        
Net income $ 9,672 $ 9,386 $ 24,437 $ 24,599
Amount allocated to participating securities (214) (187) (515) (479)
Net income available for basic common shares and basic earnings per share $ 9,458 $ 9,199 $ 23,922 $ 24,120
Net income available for basic common shares and basic earnings per share, Shares 17,609 19,444 18,220 19,542
Net income available for basic common shares and basic earnings per share, Per Share Amount $ 0.54 $ 0.47 $ 1.31 $ 1.23
Diluted Earnings per Share:        
Net income $ 9,672 $ 9,386 $ 24,437 $ 24,599
Amount allocated to participating securities (214) (187) (515) (479)
Adjustment for dilutive potential common shares $ 0 $ 0 $ 0 $ 0
Adjustment for dilutive potential common shares, Shares 5 8 5 11
Net income available for diluted common shares and diluted earnings per share $ 9,458 $ 9,199 $ 23,922 $ 24,120
Net income available for diluted common shares and diluted earnings per share, Shares 17,614 19,452 18,225 19,553
Net income available for diluted common shares and diluted earnings per share, Per Share Amount $ 0.54 $ 0.47 $ 1.31 $ 1.23