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DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 25, 2010
Quoted Prices in Active Markets for Identical Assets (Level 1)
   
Assets and liabilities measured at fair value    
Trading Securities $ 19,152 $ 18,433
Carrying Value
   
Assets and liabilities measured at fair value    
Long-term debt 474,650 468,154
Trading Securities 19,152 18,433
Estimated fair value
   
Assets and liabilities measured at fair value    
Long-term debt $ 513,449 $ 481,275