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Debt, Commitments And Contingencies (Schedule Of Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 30, 2012
Dec. 30, 2011
Debt Instrument [Line Items]    
Total debt $ 623,133 $ 564,436
Less current portion of long-term debt 87,929 65,918
Non-current portion of long-term debt 535,204 498,518
Revolving Credit Facility [Member]
   
Debt Instrument [Line Items]    
Total debt 241,000 177,300
Non-current portion of long-term debt 175,000  
Promissory Notes And Other Debt [Member]
   
Debt Instrument [Line Items]    
Total debt 2,133 2,136
Term Loan [Member]
   
Debt Instrument [Line Items]    
Total debt 380,000 385,000
Non-current portion of long-term debt $ 360,000