Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

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Stock-Based Compensation (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
Stock Options
       
Share-based compensation plan disclosures        
Awards issued (in shares)   20,000 97,000 153,000
Weighted-average exercise price (in dollars per share)   $ 29.98 $ 35.44 $ 32.38
Remaining weighted-average vesting period     1 year 3 months 18 days  
Weighted average assumptions used in estimation of fair value of options        
Risk-free interest rate (as a percent)   0.80% 0.70% 1.20%
Expected years until exercise   3 years 9 months 18 days 4 years 1 month 6 days 3 years 7 months 6 days
Expected stock volatility (as a percent)   60.70% 52.80% 60.30%
Weighted-average grant date fair value (in dollars per share)   $ 13.42 $ 14.60 $ 14.27
Restricted Stock
       
Share-based compensation plan disclosures        
Remaining weighted-average vesting period     4 months 24 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 6 months  
Restricted Stock        
Awards granted (in shares) 2,000 26,000 65,000 69,000
Weighted-average grant date fair value (in dollars per share) $ 29.32 $ 28.50 $ 33.69 $ 31.77
Performance-Based RSUs
       
Restricted Stock        
Performance period     3 years  
Number of shares of common stock per award 1   1