v3.3.1.900
Common Stock, Stock Option Plans and Stock Compensation Agreements (Details)
12 Months Ended
Jan. 03, 2016
Dec. 28, 2014
Dec. 29, 2013
Weighted average assumptions of fair value of options      
Risk-free rate 1.77% 1.87% 1.01%
Expected volatility 15.48% 14.60% 14.04%
Expected life 7 years 6 years 6 years
Dividend yield 2.90% 3.10% 3.40%