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Share Capital (Tables)
 9 Months Ended
Sep. 30, 2013
Equity [Abstract]  
Changes in Number of Shares of Class A Stock Outstanding

The following table reflects changes in the number of shares of Class A Stock outstanding for the periods indicated:

 

     Three months ended September 30,     Nine months ended September 30,  
     2013     2012     2013     2012  

Class A Stock outstanding, beginning of period

      13,496,783        13,489,162        13,508,318        13,572,265   

Issued pursuant to shared-based compensation plans

      65,227        40,850        65,227        57,647   

Repurchased and cancelled pursuant to the stock buy-back

      (119,251 )      (15,000 )      (130,786 )      (114,900 ) 
  

 

 

    

 

 

    

 

 

    

 

 

  

Class A Stock outstanding, end of period

      13,442,759        13,515,012        13,442,759        13,515,012