XML 65 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail)
3 Months Ended
Apr. 01, 2018
Apr. 02, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Risk-free rate 2.90% 2.40%
Expected dividend yield 0.32% 0.39%
Expected volatility 39.00% 41.00%
Expected term (in years) 5 years 3 months 18 days 5 years 3 months 18 days