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Restructuring and Asset Impairment - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Dec. 30, 2017
Apr. 01, 2017
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 638   $ 1,077  
Severance and retention costs liability 7,053 $ 6,856 6,531 $ 8,102
Accrued Compensation        
Restructuring Cost and Reserve [Line Items]        
Severance and retention costs liability 3,100   2,600  
RMS        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 1,038 18,100    
RMS | Minimum        
Restructuring Cost and Reserve [Line Items]        
Expected restructuring costs 5,500      
RMS | Maximum        
Restructuring Cost and Reserve [Line Items]        
Expected restructuring costs 6,000      
Cash portion of expected amount (up to) 8,000      
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 616   1,017  
Severance and Transition Costs | Other Noncurrent Liabilities        
Restructuring Cost and Reserve [Line Items]        
Severance and retention costs liability 3,900   $ 4,000  
Severance and Transition Costs | RMS        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 523      
Expected restructuring costs $ 5,000