Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plans (Details)

v2.4.0.8
Stock Incentive Plans (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 4 Months Ended 6 Months Ended
Jul. 13, 2014
Jul. 14, 2013
Apr. 20, 2014
Jul. 13, 2014
Jul. 14, 2013
Stock-based compensation expense recognized          
Stock-based compensation expense $ 1,021 $ 1,050   $ 2,030 $ 2,242
Stock Options
          
Weighted average assumptions used in estimation of fair value of options          
Risk-free interest rate (as a percent) 1.50% 1.00%   1.70% 0.70%
Expected years until exercise 5 years 4 years 1 month   5 years 9 months 4 years 2 months
Expected volatility (as a percent) 46.10% 44.20%   44.80% 44.40%
Dividend yield (as a percent) 0.00% 0.00%   0.00% 0.00%
Weighted average Black-Scholes fair value per share at date of grant (in dollars per share) $ 30.05 $ 21.14   $ 31.43 $ 15.19
Stock Options          
Outstanding, Beginning of period (in shares) 510   491 491  
Granted (in shares) 5   67    
Forfeited/expired (in shares) (3)   (6)    
Exercised (in shares) (19)   (42)    
Outstanding, End of period(in shares) 493   510 493  
Restricted Stock Units
          
Restricted Stock Units          
Outstanding, Beginning of period (in shares) 132   139 139  
Granted (in shares) 13   19    
Forfeited/expired (in shares) (1)   (4)    
Vested (in shares) (33)   (22)    
Outstanding, End of period (in shares) 111   132 111  
Labor related
          
Stock-based compensation expense recognized          
Stock-based compensation expense 18 34   49 103
Selling, general, administrative related
          
Stock-based compensation expense recognized          
Stock-based compensation expense $ 1,003 $ 1,016   $ 1,981 $ 2,139