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Shareholders' Equity Stock Based Compensation Plans (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 29, 2012
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock plans approved by shareholders   3    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   1,130,000    
Allocated Share-based Compensation Expense   $ 10,306 $ 4,971 $ 3,962
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   3,576 [1] 1,710 1,379
Allocated Share-based Compensation Expense, Net of Tax   6,730 3,261 2,583
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost 5,595 5,595 0 0
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated Share-based Compensation Expense   3,688 2,721 2,491
Time-Based Stock Awards And Performance Stock Awards [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated Share-based Compensation Expense   $ 6,618 $ 2,250 $ 1,471
[1] (1) Includes $5.6 million of CEO transition costs.