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Share Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee stock purchase program discount percentage 15.00%   15.00%  
Share-based compensation plan modifications     no  
Share-based Payment Arrangement, Noncash Expense $ 12,500 $ 7,400 $ 26,977 $ 25,755
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted     443,967  
Weighted average exercise price     $ 94.62  
Weighted average fair value per option     $ 19.46  
Total unrecognized compensation expense 10,100   $ 10,100  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     2 years  
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted     320,053  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted     83,368  
Restricted Stock Units and Performance-Based Restricted Share Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average fair value per share     $ 94.39  
Total unrecognized compensation expense $ 43,800   $ 43,800  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     2 years