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RESTRUCTURING AND ASSET IMPAIRMENT - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2018
Dec. 30, 2017
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Jun. 30, 2018
Jul. 01, 2017
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]                
Restructuring costs $ 4,675   $ 912 $ 7,169 $ 2,461      
Severance and retention costs liability 7,062 $ 6,856 7,170 7,062 7,170 $ 6,810 $ 7,010 $ 8,102
Accrued Compensation                
Restructuring Cost and Reserve [Line Items]                
Severance and retention costs liability 2,600   2,900 2,600 2,900      
RMS                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs 303 18,100   1,630        
RMS | Maximum                
Restructuring Cost and Reserve [Line Items]                
Expected restructuring costs (not expected to exceed) 1,000     1,000        
Cash portion of expected amount (up to)       2,500        
Asset Impairments and Accelerated Depreciation | RMS                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs   $ 17,700            
Severance and Transition Costs                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs 4,649   636 7,121 1,976      
Severance and Transition Costs | Other Noncurrent Liabilities                
Restructuring Cost and Reserve [Line Items]                
Severance and retention costs liability 4,400   $ 4,300 4,400 $ 4,300      
Severance and Transition Costs | RMS                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs $ 65     $ 808