Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plans (Details)

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Stock Incentive Plans (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Oct. 05, 2014
Oct. 06, 2013
Oct. 05, 2014
Oct. 06, 2013
Stock-based compensation expense recognized        
Stock-based compensation expense $ 1,178 $ 856 $ 3,211 $ 3,099
Stock Options
        
Weighted average assumptions used in estimation of fair value of options        
Risk-free interest rate (as a percent) 1.40%   1.70% 0.70%
Expected years until exercise 4 years 2 months   5 years 8 months 4 years 2 months
Expected volatility (as a percent) 40.20%   44.60% 44.40%
Dividend yield (as a percent) 0.00%   0.00% 0.00%
Weighted average Black-Scholes fair value per share at date of grant (in dollars per share) $ 18.12   $ 30.70 $ 15.19
Stock Options        
Outstanding, Beginning of period (in shares)     491  
Granted (in shares)     76  
Forfeited/expired (in shares)     (10)  
Exercised (in shares)     (68)  
Outstanding, End of period(in shares) 489   489  
Restricted Stock Units
        
Restricted Stock Units        
Outstanding, Beginning of period (in shares)     139  
Granted (in shares)     37  
Forfeited/expired (in shares)     (5)  
Vested (in shares)     (70)  
Outstanding, End of period (in shares) 101   101  
Restaurant related
        
Stock-based compensation expense recognized        
Stock-based compensation expense 16 25 65 129
Selling, general, administrative related
        
Stock-based compensation expense recognized        
Stock-based compensation expense $ 1,162 $ 831 $ 3,146 $ 2,970