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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended
Mar. 29, 2013
Mar. 30, 2012
Feb. 04, 2013
MDT Personnel, LLC
Mar. 29, 2013
MDT Personnel, LLC
Feb. 04, 2013
MDT Personnel, LLC
Customer relationships
Feb. 04, 2013
MDT Personnel, LLC
Trade name/trademarks
Feb. 04, 2013
MDT Personnel, LLC
Non-compete agreements
Intangible Assets [Line Items]              
Acquired finite-lived intangible assets     $ 10.2   $ 7.8 $ 1.0 $ 1.4
Estimated Useful Life     6 years 11 months 13 days   8 years 1 year 6 months 5 years
Goodwill acquired during the year 22.5     22.5      
Amortization of intangible assets $ 1.0 $ 0.8