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Earnings Per Share
 12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Earnings Per Share

(11) EARNINGS PER SHARE

Basic earnings and diluted earnings per share data were computed as follows:

 

     Years Ended December 31,  
     2011      2010      2009  

Numerator for basic and diluted earnings per share

         

Net income

    $ 27,557       $ 25,054       $ 27,010   

Denominator:

         

Weighted-average basic common shares outstanding

      31,267         34,075         35,240   

Assumed conversion of dilutive securities:

         

Stock options

      1,887         1,453         1,384   
  

 

 

     

 

 

     

 

 

  

Denominator for diluted earnings per share — Adjusted weighted-average shares

      33,154         35,528         36,624   
  

 

 

     

 

 

     

 

 

  

Earnings per common share:

         

Basic

    $ 0.88       $ 0.74       $ 0.77   
  

 

 

     

 

 

     

 

 

  

Diluted

    $ 0.83       $ 0.71       $ 0.74   
  

 

 

     

 

 

     

 

 

  

Stock options representing the right to purchase common stock of 714,000 shares in 2011, 1.8 million shares in 2010, and 2.6 million shares in 2009 were not included in the computation of diluted earnings per share because their inclusion would have had an anti-dilutive effect.