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Stockholders' Equity
 12 Months Ended
Dec. 31, 2012
Stockholders' Equity [Abstract]  
Stockholders' Equity

Note 18.    Stockholders’ Equity

 

                                                 
    Common Stock     Treasury Stock  

(number of shares in thousands)

   2012     2011     2010     2012     2011     2010  

At January 1

     29,555       29,555       29,555       6,507       5,851       5,890  

Exercise of options

     0       0       0       (333 )      (236 )      (186 ) 

Stock purchases

     0       0       0       48       1,087       147  

Settlement of NewMarket Corporation civil complaint

     0       0       0       0       (195 )      0  
   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

At December 31

     29,555       29,555       29,555       6,222       6,507       5,851  
   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

 

At December 31, 2012, the Company had authorized common stock of 40,000,000 shares (2011 – 40,000,000). Issued shares at December 31, 2012, were 29,554,500 (2011 – 29,554,500) and treasury stock amounted to 6,222,076 shares (2011 – 6,507,081).