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Long-term Debt - Narrative (Details) - USD ($)
6 Months Ended 12 Months Ended
Jul. 05, 2020
Dec. 29, 2019
Other Line Of Credit    
Debt Instrument [Line Items]    
Revolving loan borrowings under the Facility $ 0 $ 0
Line of credit facility, maximum borrowing capacity $ 9,500,000 $ 9,500,000
Other Line Of Credit | Minimum    
Debt Instrument [Line Items]    
Line of credit facility, interest rate during period (percentage) 2.00% 2.00%
Other Line Of Credit | Maximum    
Debt Instrument [Line Items]    
Line of credit facility, interest rate during period (percentage) 6.00% 6.00%
Syndicated Facility Agreement    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Net $ 1,100,000 $ 1,300,000
Term loan borrowings outstanding 566,800,000 581,600,000
Revolving loan borrowings under the Facility 58,800,000 20,900,000
Letters of credit outstanding $ 1,600,000 $ 2,200,000
Long-term debt, weighted average interest rate, at point in time (percentage) 2.75% 3.27%
Syndicated Facility Agreement | Term Loan    
Debt Instrument [Line Items]    
Unamortized debt costs $ 5,400,000 $ 6,300,000