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ACQUISITIONS (MDT Narrative) (Details) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 04, 2013 USD ($) state branch | Dec. 25, 2015 USD ($) | Dec. 26, 2014 USD ($) | Dec. 27, 2013 USD ($) | Sep. 25, 2015 USD ($) | Jun. 26, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | $ 67,500 | $ 305,876 | $ 77,560 |  |
Goodwill |  | $ 268,495 | $ 241,855 |  | $ 14,600 | $ 10,700
MDT Personnel, LLC [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 53,100 |  |  |  |  |
Estimated Fair Value | 10,200 |  |  |  |  |
Goodwill | $ 25,686 |  |  |  |  |
Business Acquisition, Number of Branch Locations Operated by Acquiree | branch | 105 |  |  |  |  |
Business Acquisition, Number of States in Which Acquiree Operates | state | 25 |  |  |  |  |
Acquisition-Related and integration Costs Associated with a Business Combination |  |  |  | $ 6,000 |  |

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