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FAIR VALUE MEASUREMENTS (Details 2) (Fund Of Funds Investment [Member], Fair Value, Inputs, Level 3 [Member], USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 24, 2012
Jun. 26, 2011
Fund Of Funds Investment [Member] | Fair Value, Inputs, Level 3 [Member]
   
Balance at beginning of period $ 59 $ 1,190
Included in other comprehensive income 0 51
Sale of securities (59) 0
Balance at end of period $ 0 $ 1,241