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RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 24 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Dec. 29, 2018
Mar. 30, 2019
Mar. 31, 2018
Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]                
Restructuring costs $ 1,685 $ 1,856 $ 3,234 $ 2,494        
Severance and other personnel related costs liability and lease obligation liabilities 2,758 6,810 2,758 6,810 $ 2,921 $ 2,113 $ 7,053 $ 6,856
Accrued Compensation                
Restructuring Cost and Reserve [Line Items]                
Severance and other personnel related costs liability and lease obligation liabilities 2,700 2,600 2,700 2,600        
RMS                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs 641 0 942 0 20,100      
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 1,311 1,856 1,711 2,472        
Severance and Transition Costs | Other Noncurrent Liabilities                
Restructuring Cost and Reserve [Line Items]                
Severance and other personnel related costs liability and lease obligation liabilities $ 100 $ 4,200 $ 100 $ 4,200        
Severance and Transition Costs | RMS                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs         $ 1,200