Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v2.4.0.6
Stock-Based Compensation (Details) (USD $)
3 Months Ended 6 Months Ended
Jul. 08, 2012
Jul. 10, 2011
Jul. 08, 2012
Jul. 10, 2011
Stock Options
       
Share-based compensation plan disclosures        
Awards issued (in shares)   110,000 97,000 133,000
Weighted-average exercise price (in dollars per share)   $ 34.60 $ 35.44 $ 32.75
Remaining weighted-average vesting period 1 year 4 months 24 days   1 year 4 months 24 days  
Weighted average assumptions used in estimation of fair value of options        
Risk-free interest rate (as a percent)   1.20% 0.70% 1.20%
Expected years until exercise   3 years 7 months 6 days 4 years 1 month 6 days 3 years 7 months 6 days
Expected stock volatility (as a percent)   60.00% 52.80% 60.00%
Weighted-average grant date fair value (in dollars per share)   $ 15.28 $ 14.60 $ 14.40
Restricted Stock
       
Share-based compensation plan disclosures        
Remaining weighted-average vesting period     7 months 6 days  
Restricted Stock        
Non-vested shares of common stock outstanding 3,000   3,000  
Vesting period     4 years  
Time Based RSUs
       
Share-based compensation plan disclosures        
Remaining weighted-average vesting period 1 year 7 months 6 days   1 year 7 months 6 days  
Restricted Stock        
Awards granted (in shares)   40,000 63,000 43,000
Weighted-average grant date fair value (in dollars per share)   $ 34.61 $ 33.84 $ 33.77
Time Based RSUs | Employees and non-employee directors
       
Restricted Stock        
Awards granted (in shares) 32,000      
Weighted-average grant date fair value (in dollars per share) 32.31      
Number of shares of common stock per award 1   1  
Time Based RSUs | Non-employee directors
       
Restricted Stock        
Number of installments for award vesting 3   3  
Time Based RSUs | Minimum | Employees
       
Restricted Stock        
Vesting period 3 years      
Time Based RSUs | Maximum | Employees
       
Restricted Stock        
Vesting period 4 years      
Performance-Based RSUs
       
Restricted Stock        
Number of shares of common stock per award 1   1  
Performance period     3 years