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Leases - Narrative (Details) - USD ($)
$ in Thousands
Sep. 28, 2019
Jan. 01, 2019
Dec. 30, 2018
Dec. 29, 2018
Operating Leased Assets [Line Items]        
Operating lease assets $ 53,689     $ 0
Operating lease liability $ 53,799      
Lease renewal term 5 years      
Minimum        
Operating Leased Assets [Line Items]        
Lease term 1 year      
Maximum        
Operating Leased Assets [Line Items]        
Lease term 15 years      
ASU 2016-02        
Operating Leased Assets [Line Items]        
Operating lease assets     $ 57,500  
Operating lease liability   $ 57,500