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BUSINESS ACQUISITIONS - Celsis, Additional Information (Details) - Celsis - USD ($)
$ in Thousands
 5 Months Ended 12 Months Ended
Jul. 24, 2015
Dec. 26, 2015
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Business Acquisition [Line Items]          
Purchase price $ 214,500        
Assumed liabilities 10,300        
Purchase price allocation 212,236        
Cash acquired $ 2,300        
Transaction and integration costs     $ 1,000 $ 8,800  
Revenue   $ 11,100      
Operating income (loss)   $ (6,100)      
Nonrecurring costs and other adjustments       $ (600) $ 13,100