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Net Income Per Share
 9 Months Ended
Jun. 30, 2011
Net Income Per Share [Abstract]  
Net Income Per Share
Note 9: Net Income Per Share
Basic per share data is determined by dividing net income by the weighted average shares outstanding during the period. Diluted per share data is computed by dividing net income by the weighted average shares outstanding, assuming all dilutive potential common shares were issued. With respect to the assumed proceeds from the exercise of dilutive options, the treasury stock method is calculated using the average market price for the period.
The following table presents the computation of basic and diluted per share data for the nine and three months ended June 30, 2011 and 2010:
                                                 
    Nine Months Ended June 30,  
    2011     2010  
            Weighted     Per             Weighted     Per  
    Net     Average     Share     Net     Average     Share  
    Income     Shares     Amount     Income     Shares     Amount  
Basic
  $ 8,865,000       14,624,685     $ 0.61     $ 8,471,000       14,455,754     $ 0.59  
 
                                               
Effect of Dilutive Stock
            199,467       (0.01 )             89,003       (0.01 )
 
                                   
 
                                               
Diluted
  $ 8,865,000       14,824,152     $ 0.60     $ 8,471,000       14,544,757     $ 0..58  
 
                                   
At June 30, 2011, 952,810 options at a weighted average exercise price of $13.33 were not included in the diluted earnings per share calculation as they were antidilutive.
At June 30, 2010, 715,345 options at a weighted average exercise price of $15.88 were not included in the diluted earnings per share calculation as they were antidilutive.
                                                 
    Three Months Ended June 30,  
    2011     2010  
            Weighted     Per             Weighted     Per  
    Net     Average     Share     Net     Average     Share  
    Income     Shares     Amount     Income     Shares     Amount  
Basic
  $ 3,344,000       14,620,190     $ 0.23     $ 3,121,000       14,599,162     $ 0.21  
 
                                               
Effect of Dilutive Stock
            237,869                       207,594          
 
                                   
 
                                               
Diluted
  $ 3,344,000       14,858,059     $ 0.23     $ 3,121,000       14,806,756     $ 0.21  
 
                                   
At June 30, 2011, 1,046,162 options at a weighted average exercise price of $12.85 were not included in the diluted earnings per share calculation as they were antidilutive.
At June 30, 2010, 747,771 options at a weighted average exercise price of $15.54 were not included in the diluted earnings per share calculation as they were antidilutive.