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Share Based Compensation (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 4,000,000 $ 3,400,000 $ 12,114,000 $ 10,349,000
Employee Stock Option [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted     1,142,719 1,022,426
Weighted average exercise price     $ 63.88 $ 51.77
Weighted average fair value per share     $ 15.32 $ 14.66
Total unrecognized compensation expense 20,400,000   20,400,000  
Remaining weighted average expense recognition period     1 year 4 months 24 days  
Restricted Stock Units (RSUs) [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted     57,452 59,864
Weighted average fair value per share     $ 64.51 $ 51.72
Total unrecognized compensation expense $ 3,800,000   $ 3,800,000  
Remaining weighted average expense recognition period     1 year 9 months 18 days