Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plans (Details)

v3.4.0.3
Stock Incentive Plans (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 4 Months Ended
Apr. 17, 2016
Apr. 19, 2015
Stock-based compensation expense recognized    
Stock-based compensation expense $ 2.1 $ 1.4
Stock Options    
Weighted average assumptions used in estimation of fair value of options    
Risk-free interest rate (as a percent) 1.20% 1.40%
Expected years until exercise 4 years 8 months 12 days 4 years 9 months 18 days
Expected stock volatility (as a percent) 39.30% 40.60%
Dividend yield (as a percent) 0.00% 0.00%
Weighted average Black-Scholes fair value per share at date of grant (in dollars per share) $ 21.93 $ 29.69
Stock Options    
Outstanding, Beginning of period (in shares) 395  
Granted (in shares) 125  
Forfeited/expired (in shares) (4)  
Exercised/vested (in shares) (7)  
Outstanding, End of period (in shares) 509  
Restricted Stock Units    
Restricted Stock Units    
Outstanding, Beginning of period (in shares) 75  
Granted (in shares) 33  
Forfeited/expired (in shares) (1)  
Exercised/vested (in shares) (17)  
Outstanding, End of period (in shares) 90