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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) (USD $)
 12 Months Ended
Dec. 28, 2012
Dec. 30, 2011
acquisitions
Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Abstract]      
Change in carrying amount of goodwill for the current fiscal year $ 0    
Number of business acquisitions completed during period   2  
Total purchase price of acquisitions   17,400,000  
Future payments related to business acquisitions completed during fiscal year 2011 6,400,000    
Cash paid during period in connection with 2011 acquisitions 4,600,000    
Acquired finite-lived intangible assets   1,800,000  
Estimated weighted average useful life of acquired finite-lived intangible assets   4 years 7 months 6 days  
Goodwill acquired during the year 0 11,200,000  
Amortization of intangible assets $ 3,100,000 $ 2,900,000 $ 2,700,000