Common Stock and Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 25, 2016
Summary of Stock Options under Employee Equity Incentive Plan and Stock Option Plan for Non-Employee Directors

Information related to stock options under the Employee Equity Incentive Plan and the Stock Option Plan for Non-Employee Directors is summarized as follows:

 

     Shares      Weighted-
Average
Exercise
Price		      Weighted-Average
Remaining
Contractual Term
in Years		      Aggregate
Intrinsic
Value
(in thousands)		  
           

Outstanding at December 26, 2015

      1,127,162       $ 63.99         

Granted

      765,112         199.05         

Forfeited

      (30,514 )       213.51         

Expired

      —           —           

Exercised

      (326,653 )       90.64         
  

 

 

     

 

 

     

 

 

     

 

 

  

Outstanding at June 25, 2016

      1,535,107       $ 128.99         6.10       $ 80,043   
  

 

 

     

 

 

     

 

 

     

 

 

  

Exercisable at June 25, 2016

      408,936       $ 68.47         2.93       $ 38,947   
  

 

 

     

 

 

     

 

 

     

 

 

  

Vested and expected to vest at June 25, 2016

      1,478,799       $ 128.15         6.05       $ 77,988   
  

 

 

     

 

 

     

 

 

     

 

 

  
Summary of Vesting Activities of Shares Issued Under Investment Share Program and Restricted Stock Awards

The following table summarizes vesting activities of shares issued under the investment share program and restricted stock awards:

 

     Number of
Shares		      Weighted
Average Fair
Value		  

Non-vested at December 26, 2015

      60,922       $ 150.03   

Granted

      27,221         161.39   

Vested

      (19,281 )       111.56   

Forfeited

      (4,105 )       145.12   
  

 

 

     

Non-vested at March 25, 2016

      64,757       $ 166.57