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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Contingent Consideration) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Business Acquisition, Contingent Consideration [Line Items]        
Accretion (income) expense $ 400 $ 500 $ 900 $ 2,300
Level 3 [Member]
       
Business Acquisition, Contingent Consideration [Line Items]        
Balance at beginning of period 16,848 29,950 16,348 29,704
Payments made (8,901) (14,721) (8,901) (14,721)
Accretion (income) expense 444 480 900 2,347
Foreign currency translation adjustment (762) 791 (718) (830)
Balance at end of period $ 7,629 $ 16,500 $ 7,629 $ 16,500
Discount rate     18.00%