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Stockholders' Equity
12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Stockholders' Equity

Note 16.    Stockholders’ Equity

 

     Common Stock      Treasury Stock  

(number of shares in thousands)

   2017      2016      2015      2017     2016     2015  

At January 1

     29,555        29,555        29,555        5,483       5,453       5,263  

Exercise of options

     0        0        0        (296     (152     (152

Stock purchases

     0        0        0        17       182       342  
  

 

 

    

 

 

    

 

 

    

 

 

   

 

 

   

 

 

 

At December 31

     29,555        29,555        29,555        5,204       5,483       5,453  
  

 

 

    

 

 

    

 

 

    

 

 

   

 

 

   

 

 

 

 

At December 31, 2017, the Company had authorized common stock of 40,000,000 shares (2016 – 40,000,000).