XML 41 R30.htm IDEA: XBRL DOCUMENT v3.3.1.900
(5) Share-Based Compensation Plans - Annualized weighted average values of significant assumptions of the options granted (Details) - $ / shares
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Compensation and Retirement Disclosure [Abstract]    
Risk-free interest rate low 1.44% 0.91%
Risk-free interest rate high 1.60% 2.16%
Expected life in years - low 6 years 9 years
Expected life in years - high 7 years 9 years
Expected volatility 0.50% 0.53%
Expected dividend yield $ 0 $ 0
Weighted average fair value of grants $ 1.41 $ 1.74