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Debt - Asset-backed revolver Narratives (Details) - Asset-backed revolver - USD ($)
Mar. 28, 2020
Dec. 28, 2019
Revolving credit facility    
Line of Credit Facility    
Maximum borrowing capacity of credit facility $ 325,000,000.0  
Current borrowing capacity of credit facility 301,200,000 $ 294,600,000
Line of credit carrying value 0 0
Letter of credit sub-facility    
Line of Credit Facility    
Maximum borrowing capacity of credit facility 150,000,000.0  
Line of credit carrying value $ 45,900,000 $ 50,100,000