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Share-Based Compensation (Tables)
 6 Months Ended
Sep. 28, 2013
Options Activity and Information about Options Outstanding

The following table summarizes the share option activity during the six months ended September 28, 2013, and information about options outstanding at September 28, 2013:

 

     Number of
Options		     Weighted
Average
Exercise price		      Weighted
Average
Remaining
Contractual
Life (years)		      Aggregate
Intrinsic
Value
(in  thousands)		  

Outstanding at March 30, 2013

      10,381,342      $ 9.21         

Granted

      613,381      $ 62.46         

Exercised

      (2,144,008 )    $ 6.08         

Canceled/forfeited

      (3,510 )    $ 62.24         
  

 

 

          

Outstanding at September 28, 2013

      8,847,205      $ 13.64         6.64       $ 538,013   
  

 

 

    

 

 

     

 

 

     

 

 

  

Vested or expected to vest at September 28, 2013

      8,493,317      $ 13.64         6.64      
  

 

 

    

 

 

     

 

 

     

 

 

  

Vested and exercisable at September 28, 2013

      2,203,549      $ 7.12         6.21       $ 148,362   
  

 

 

    

 

 

     

 

 

     

 

 

  
Assumptions Used to Estimate Fair Value of Options

The following table represents assumptions used to estimate the fair value of options:

 

     Three Months Ended     Six Months Ended  
     September 28,
2013		     September 29,
2012		     September 28,
2013		     September 29,
2012		  

Expected dividend yield

      0.0 %      0.0 %      0.0 %      0.0 % 

Volatility factor

      43.3 %      50.2 %      46.1 %      50.2 % 

Weighted average risk-free interest rate

      1.5 %      0.6 %      1.0 %      0.6 % 

Expected life of option

      4.75 years        4.75 years        4.75 years        4.75 years   
Restricted Shares and Restricted Share Units

The following table summarizes restricted shares under the 2012 Plan as of September 28, 2013 and changes during the fiscal period then ended:

 

     Number of Unvested
Restricted Shares		     Weighted
Average Grant
Date Fair Value		  

Unvested at March 30, 2013

      617,468      $ 23.66   

Granted

      249,921      $ 62.55   

Vested

      (888 )    $ 38.75   

Canceled/forfeited

      (1,406 )    $ 62.24   
  

 

 

    

Unvested at September 28, 2013

      865,095      $ 34.54   
  

 

 

    

The following table summarizes restricted share units under the 2012 Plan as of September 28, 2013 and changes during the fiscal period then ended:

 

     Number of Unvested
Restricted Units		      Weighted
Average Grant
Date Fair Value		  

Unvested at March 30, 2013

      27,763       $ 31.12   

Granted

      174,002       $ 62.64   

Vested

      —         $ —     

Canceled/forfeited

      —         $ —     
  

 

 

     

Unvested at September 28, 2013

      201,765       $ 58.30