XML 32 R11.htm IDEA: XBRL DOCUMENT v2.4.0.6
Earnings Per Share
 3 Months Ended
Mar. 31, 2012
Earnings Per Share [Abstract]  
Earnings Per Share
(6) The following table reconciles the numerators and denominators used in the calculation of basic and diluted earnings per share (EPS):

 

     Three Months Ended March 31,  
     2012      2011  

Numerators:

      

Numerator for both basic and diluted EPS, net income

    $ 46,344,584       $ 42,332,882   

Denominators:

      

Denominator for basic EPS,weighted-average shares outstanding

      143,502,772         141,860,885   

Potentially dilutive shares resulting from stock plans

      1,485,229         2,124,959   
  

 

 

     

 

 

  

Denominator for diluted EPS

      144,988,001         143,985,844   
  

 

 

     

 

 

  

Shares related to stock plans not included in diluted average common shares outstanding because their effect would be antidilutive

      2,233,907         0