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FAIR VALUE MEASUREMENTS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 30, 2013
Minimum
Mar. 30, 2013
Maximum
Mar. 30, 2013
Fair Value Measurement, Recurring Basis
Level 1
Dec. 29, 2012
Fair Value Measurement, Recurring Basis
Level 1
Mar. 30, 2013
Fair Value Measurement, Recurring Basis
Level 2
Dec. 29, 2012
Fair Value Measurement, Recurring Basis
Level 2
Mar. 30, 2013
Fair Value Measurement, Recurring Basis
Level 3
Dec. 29, 2012
Fair Value Measurement, Recurring Basis
Level 3
Mar. 30, 2013
Fair Value Measurement, Recurring Basis
Total
Dec. 29, 2012
Fair Value Measurement, Recurring Basis
Total
Assets:                      
Investments in publicly traded equity securities       $ 56 $ 127 $ 0 $ 0 $ 0 $ 0 $ 56 $ 127
Forward contracts       0 0 8,678 2,576 0 0 8,678 2,576
Investment in publicly traded mutual funds       3,256 3,188 0 0 0 0 3,256 3,188
Total       3,312 3,315 8,678 2,576 0 0 11,990 5,891
Liabilities:                      
Contingent Consideration       0   0   7,532   7,532  
Forward contracts       0 0 1,719 5,142 0 0 1,719 5,142
Total       $ 0 $ 0 $ 1,719 $ 5,142 $ 7,532 $ 0 $ 9,251 $ 5,142
Revenue growth for 2013, 2014 and 2015 (as a percent)   3.00% 10.00%                
Operating expenses as a percentage of revenues 28.00%                    
Discount rate (as a percent) 19.00%