Jan 07                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $540,200               
              $27.01 p/Share               
          
        
            
        
          
              20,000 
              Added 17.86% 
          
   
         
        
          
            91,974  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Oct 02                           
            2014                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,127,189               
              $87.76 p/Share               
          
        
            
        
          
              12,844 
              Reduced 13.35% 
          
   
         
        
          
            83,400  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 20                           
            2014                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $107,830               
              $77.52 p/Share               
          
        
            
        
          
              1,391 
              Reduced 1.42% 
          
   
         
        
          
            96,244  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 19                           
            2014                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $81,241               
              $77.52 p/Share               
          
        
            
        
          
              1,048 
              Reduced 1.06% 
          
   
         
        
          
            97,635  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 18                           
            2014                           
          
        
          
            
              BUY 
            
            
                Grant, award, or other acquisition 
            
                            
         
        
          
              -                  
          
        
            
        
          
              8,063 
              Added 7.55% 
          
   
         
        
          
            98,683  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 15                           
            2014                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $96,211               
              $78.03 p/Share               
          
        
            
        
          
              1,233 
              Reduced 1.34% 
          
   
         
        
          
            90,620  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jan 10                           
            2014                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $435,760               
              $76.84 p/Share               
          
        
            
        
          
              5,671 
              Reduced 5.81% 
          
   
         
        
          
            91,853  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 20                           
            2013                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $90,590               
              $63.35 p/Share               
          
        
            
        
          
              1,430 
              Reduced 1.45% 
          
   
         
        
          
            97,524  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 19                           
            2013                           
          
        
          
            
              BUY 
            
            
                Grant, award, or other acquisition 
            
                            
         
        
          
              -                  
          
        
            
        
          
              9,866 
              Added 9.07% 
          
   
         
        
          
            98,954  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 16                           
            2013                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $80,961               
              $63.35 p/Share               
          
        
            
        
          
              1,278 
              Reduced 1.41% 
          
   
         
        
          
            89,088  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 16                           
            2013                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $80,961               
              $63.35 p/Share               
          
        
            
        
          
              1,278 
              Reduced 1.41% 
          
   
         
        
          
            89,088  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 15                           
            2013                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $76,977               
              $63.67 p/Share               
          
        
            
        
          
              1,209 
              Reduced 1.32% 
          
   
         
        
          
            90,366  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 15                           
            2013                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $76,977               
              $63.67 p/Share               
          
        
            
        
          
              1,209 
              Reduced 1.32% 
          
   
         
        
          
            90,366  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Mar 26                           
            2013                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $602,124               
              $59.27 p/Share               
          
        
            
        
          
              10,159 
              Reduced 9.99% 
          
   
         
        
          
            91,575  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Dec 26                           
            2012                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $2,080,800               
              $52.02 p/Share               
          
        
            
        
          
              40,000 
              Reduced 28.22% 
          
   
         
        
          
            101,734  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Dec 26                           
            2012                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $801,600               
              $20.04 p/Share               
          
        
            
        
          
              40,000 
              Added 25.36% 
          
   
         
        
          
            117,734  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 20                           
            2012                           
          
        
          
            
              BUY 
            
            
                Grant, award, or other acquisition 
            
                            
         
        
          
              -                  
          
        
            
        
          
              38,678 
              Added 43.19% 
          
   
         
        
          
            50,867  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 17                           
            2012                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $162,599               
              $93.02 p/Share               
          
        
            
        
          
              1,748 
              Reduced 12.54% 
          
   
         
        
          
            12,189  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 16                           
            2012                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $66,625               
              $93.97 p/Share               
          
        
            
        
          
              709 
              Reduced 4.84% 
          
   
         
        
          
            13,937  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 15                           
            2012                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $62,584               
              $93.97 p/Share               
          
        
            
        
          
              666 
              Reduced 4.35% 
          
   
         
        
          
            14,646  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jan 10                           
            2012                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $393,680               
              $98.42 p/Share               
          
        
            
        
          
              4,000 
              Reduced 20.41% 
          
   
         
        
          
            15,597  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jan 10                           
            2012                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $153,120               
              $38.28 p/Share               
          
        
            
        
          
              4,000 
              Added 16.95% 
          
   
         
        
          
            19,597  
            Class B Common Stock