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Share Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 30, 2019
Mar. 30, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Stock Purchase Plan Discount Rate   0.15  
Share-based Compensation   $ 9,624,000 $ 8,567,000
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted   389,290  
Weighted average exercise price   $ 89.59  
Weighted average fair value per option   $ 20.93  
Total unrecognized compensation expense $ 16,500,000 $ 16,500,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 10 months 19 days    
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted   230,820  
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted   56,379  
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   $ 86.35  
Total unrecognized compensation expense $ 33,900,000 $ 33,900,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 3 months 45 days