Dec 28                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,589,500               
              $63.58 p/Share               
          
        
            
        
          
              25,000 
              Reduced 13.01% 
          
   
         
        
          
            167,196  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Dec 28                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $431,000               
              $17.24 p/Share               
          
        
            
        
          
              25,000 
              Added 11.51% 
          
   
         
        
          
            192,196  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Nov 16                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,529,125               
              $122.33 p/Share               
          
        
            
        
          
              12,500 
              Reduced 13.01% 
          
   
         
        
          
            83,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Nov 16                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $431,000               
              $34.48 p/Share               
          
        
            
        
          
              12,500 
              Added 12.63% 
          
   
         
        
          
            86,452  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Oct 15                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,599,875               
              $127.99 p/Share               
          
        
            
        
          
              12,500 
              Reduced 13.01% 
          
   
         
        
          
            83,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Oct 15                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $431,000               
              $34.48 p/Share               
          
        
            
        
          
              12,500 
              Added 12.82% 
          
   
         
        
          
            84,982  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Sep 21                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,451,875               
              $116.15 p/Share               
          
        
            
        
          
              12,500 
              Reduced 13.01% 
          
   
         
        
          
            83,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Sep 21                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $431,000               
              $34.48 p/Share               
          
        
            
        
          
              12,500 
              Added 12.55% 
          
   
         
        
          
            87,134  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 24                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $5,681,500               
              $113.63 p/Share               
          
        
            
        
          
              50,000 
              Reduced 37.43% 
          
   
         
        
          
            83,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 24                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $1,724,000               
              $34.48 p/Share               
          
        
            
        
          
              50,000 
              Added 27.23% 
          
   
         
        
          
            133,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 20                           
            2015                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $229,654               
              $113.13 p/Share               
          
        
            
        
          
              2,030 
              Reduced 2.37% 
          
   
         
        
          
            83,598  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 19                           
            2015                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $172,358               
              $112.8 p/Share               
          
        
            
        
          
              1,528 
              Reduced 1.75% 
          
   
         
        
          
            85,628  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 18                           
            2015                           
          
        
          
            
              SELL 
            
            
                Payment of exercise price or tax liability 
            
                            
         
        
          
              $140,887               
              $112.8 p/Share               
          
        
            
        
          
              1,249 
              Reduced 1.41% 
          
   
         
        
          
            87,156  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jul 17                           
            2015                           
          
        
          
            
              BUY 
            
            
                Grant, award, or other acquisition 
            
                            
         
        
          
              -                  
          
        
            
        
          
              4,433 
              Added 4.77% 
          
   
         
        
          
            88,405  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jun 05                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,623,360               
              $101.46 p/Share               
          
        
            
        
          
              16,000 
              Reduced 16.0% 
          
   
         
        
          
            83,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jun 05                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $419,520               
              $26.22 p/Share               
          
        
            
        
          
              16,000 
              Added 13.8% 
          
   
         
        
          
            99,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            May 05                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $2,009,600               
              $100.48 p/Share               
          
        
            
        
          
              20,000 
              Reduced 19.24% 
          
   
         
        
          
            83,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            May 05                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $524,400               
              $26.22 p/Share               
          
        
            
        
          
              20,000 
              Added 16.13% 
          
   
         
        
          
            103,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Apr 06                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,993,000               
              $99.65 p/Share               
          
        
            
        
          
              20,000 
              Reduced 19.24% 
          
   
         
        
          
            83,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Apr 06                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $524,400               
              $26.22 p/Share               
          
        
            
        
          
              20,000 
              Added 16.32% 
          
   
         
        
          
            102,572  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Mar 05                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,966,200               
              $98.31 p/Share               
          
        
            
        
          
              20,000 
              Reduced 19.24% 
          
   
         
        
          
            83,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Mar 05                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $475,000               
              $23.75 p/Share               
          
        
            
        
          
              20,000 
              Added 17.55% 
          
   
         
        
          
            93,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Feb 20                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,900,000               
              $95.0 p/Share               
          
        
            
        
          
              20,000 
              Reduced 19.24% 
          
   
         
        
          
            83,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Feb 20                           
            2015                           
          
        
          
            
              BUY 
            
            
                Exercise of conversion of derivative security 
            
                            
         
        
          
              $425,600               
              $21.28 p/Share               
          
        
            
        
          
              20,000 
              Added 16.13% 
          
   
         
        
          
            103,972  
            Class B Common Stock 
          
          
        
          
             
           
                
        
      
      
        
            Jan 07                           
            2015                           
          
        
          
            
              SELL 
            
            
                Open market or private sale 
            
                            
         
        
          
              $1,900,000               
              $95.0 p/Share               
          
        
            
        
          
              20,000 
              Reduced 19.24% 
          
   
         
        
          
            83,974  
            Class B Common Stock