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Earnings Per Share.
 3 Months Ended
Oct. 31, 2011
Earnings Per Share [Abstract]  
Earnings Per Share.
(3) Earnings Per Share. Basic earnings per share have been computed by dividing net income by the weighted average shares outstanding. Diluted earnings per share have been computed by dividing net income by the weighted average shares outstanding plus potentially dilutive common shares. The following table presents information necessary to calculate basic and diluted earnings per share for periods indicated:
                 
    Three Months Ended  
    October 31,  
    2011     2010  
    (Amounts in thousands, except  
    per share data)  
Income from continuing operations
  $ 3,568     $ 3,516  
Loss from discontinued operations
    (33 )     —  
 
           
Net income
  $ 3,535     $ 3,516  
 
           
 
               
Weighted average shares outstanding-basic
    11,348       11,299  
Dilutive effect of options and stock awards
    163       161  
 
           
Weighted average shares outstanding-diluted
    11,511       11,460  
 
           
 
               
BASIC EARNINGS PER SHARE
               
Basic earnings per share from continuing operations
  $ 0.31     $ 0.31  
Basic earnings per share on loss from discontinued operations
    —       —  
 
           
Basic earnings per share
  $ 0.31     $ 0.31  
 
           
 
               
DILUTED EARNINGS PER SHARE
               
Diluted earnings per share from continuing operations
  $ 0.31     $ 0.31  
Diluted earnings per share on loss from discontinued operations
    —       —  
 
           
Diluted earnings per share
  $ 0.31     $ 0.31  
 
           
Outstanding stock based awards are not included in the computation of diluted earnings per share under the treasury stock method, if including them would be anti-dilutive. There were approximately 7,300 shares of potentially dilutive securities not included in the computation of diluted earnings per share for the three months ended October 31, 2011 and there were no shares of potentially dilutive securities not included in the computation of diluted earnings per share for the three month period ended October 31, 2010.