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Shareholders' Equity (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended
Jul. 02, 2011
Jul. 03, 2010
Jul. 02, 2011
Jul. 03, 2010
May 31, 2011
Stock-Based Incentive Awards[Member]
Jul. 02, 2011
Stock-Based Incentive Awards[Member]
Jul. 02, 2011
Restricted Stock [Member]
Recognized share-based compensation expense $ 4,400,000 $ 1,700,000 $ 6,235,000 $ 3,065,000      
Excess income tax benefit recognized relating to share-based compensation     1,000,000 1,400,000      
Unrecognized compensation cost related to share-based compensation $ 27,000,000   $ 27,000,000        
Share-based compensation expected to recognize over a weighted average period, years     3.1        
Authorized shares of common stock 5,000,000   5,000,000        
Share available for future grant or payment under the various plans 1,400,000   1,400,000        
Per share weighted average fair value of share-based incentive awards granted         $ 26.81    
Share-based incentive awards, risk-free interest rate           2.60%  
Share-based incentive awards, expected dividend yield           1.00%  
Share-based incentive awards, expected volatility           35.50%  
Share-based incentive awards, estimated life, years           7.0  
Restricted stock outstanding, shares             231,730
Restricted stock weighted average grant date fair value             $ 61.26
Restricted stock weighted average life             2.3
Share- based incentive awards expiration, in years 10   10       3
Restricted stock vested, shares             30,350
Restricted stock, stock vested with a weighted average fair value             $ 43.56
Shares of restricted stock granted             81,203
Restricted stock granted with a weighted average fair value             $ 72.06
Restricted stock forfeited             300
Restricted stock, forfeited with a weighted average fair value             $ 52.01