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Employee Benefit Plans (Schedule of Valuation and Expense Information) (Details)
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Jul. 01, 2018
Jul. 02, 2017
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected life (in years) 4 years 5 months 4 years 5 months 4 years 5 months
Risk-free interest rate 1.65% 2.32% 1.65%
Expected volatility 31.60% 30.90% 31.60%
Dividend yield 0.00% 0.00% 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 1.81% 0.66%
Expected volatility 37.10% 27.60%
Dividend yield 0.00% 0.00%