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Stock-Based Compensation (Details 2) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2015
Sep. 30, 2014
Sep. 29, 2015
Sep. 30, 2014
Dec. 30, 2014
Stock options          
Stock option activity, shares          
Outstanding, at the beginning of the period (in shares)     4,023    
Granted (in shares)     311    
Exercised (in shares)     (1,129)    
Forfeited or cancelled (in shares)     (67)    
Outstanding at the end of the period (in shares) 3,138   3,138   4,023
Exercisable at the end of the period (in shares) 1,779   1,779    
Weighted Average Exercise price          
Outstanding at the beginning of the period (in dollars per share)     $ 26.34    
Granted (in dollars per share)     48.01    
Exercised (in dollars per share)     22.55    
Forfeited or cancelled (in dollars per share)     12.57    
Outstanding at the end of the period (in dollars per share) $ 30.14   30.14   $ 26.34
Exercisable at the end of the period (in dollars per share) $ 24.20   $ 24.20    
Weighted Average Remaining Contractual Term          
Weighted Average Remaining Contractual Term     3 years 10 months 24 days   3 years 8 months 12 days
Exercisable at the end of the period     2 years 8 months 12 days    
Aggregate Intrinsic Value          
Outstanding at the beginning of the period     $ 97,406    
Outstanding at the end of the period $ 73,714   73,714   $ 97,406
Exercisable at the end of the period 52,365   52,365    
Total intrinsic value of options exercised 13,100 $ 4,800 34,700 $ 17,500  
Unrecognized Stock-based Compensation Expense          
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units 11,300   $ 11,300    
Expected weighted average period for recognition of compensation expense related to unvested stock option     2 years 1 month 6 days    
Restricted stock          
Unrecognized Stock-based Compensation Expense          
Total unrecognized stock-based compensation expenses related to unvested stock options, restricted shares and restricted share units $ 43,700   $ 43,700    
Expected weighted average period for recognition of compensation expense related to unvested stock option     3 years    
Restricted Shares and Restricted Share Units          
Outstanding at the beginning of the period (in shares)     1,820    
Granted (in shares)     397    
Vested (in shares)     (248)    
Forfeited (in shares)     (82)    
Outstanding at the end of the period (in shares) 1,887   1,887   1,820
Fair value of shares vested $ 500 $ 400 $ 6,800 $ 4,200  
Weighted Average Fair Value          
Outstanding at the beginning of the period (in dollars per share)     $ 37.12    
Granted (in dollars per share) $ 54.47 $ 43.41 49.84    
Vested (in dollars per share)     27.47    
Forfeited (in dollars per share)     37.14    
Outstanding at the end of the period (in dollars per share) $ 41.07   $ 41.07   $ 37.12