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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
Sep. 28, 2019
Jan. 01, 2019
Dec. 30, 2018
Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease assets $ 53,689     $ 0
Operating lease liability 53,799      
Cumulative impact, deferred gains     $ 1,291  
ASU 2016-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease assets     $ 57,500  
Operating lease liability   $ 57,500    
Cumulative impact, deferred gains   $ 1,700    
Accounts Payable        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Outstanding checks and electronic payments $ 39,800     $ 17,400