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Employee Benefit Plans (Schedule of Valuation and Expense Information) (Details)
6 Months Ended
Jun. 30, 2019
Jul. 01, 2018
Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years)   4 years 4 months 24 days
Risk-free interest rate   2.32%
Expected volatility   30.90%
Dividend yield   0.00%
ESPP    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 months 6 months
Risk-free interest rate 2.49% 1.81%
Expected volatility 42.60% 37.10%
Dividend yield 0.00% 0.00%