Annual report pursuant to Section 13 and 15(d)

Debt - Summary of Long-term Debt (Details)

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Debt - Summary of Long-term Debt (Details) - USD ($)
$ in Thousands
Dec. 27, 2018
Dec. 28, 2017
Sep. 30, 2016
Debt Instrument [Line Items]      
Total debt at par value $ 149,000 $ 193,500  
Less: current maturities 3,500 3,500  
Long-term debt maturities 145,500 190,000  
Less: unamortized discount and debt issuance costs 3,666 4,438  
Total long-term debt $ 141,834 185,562  
Term Loan Facility      
Debt Instrument [Line Items]      
Interest rate at end of period, as a percent 4.48%    
Total debt at par value $ 149,000 152,500 $ 350,000
Wells Facility Revolving Line of Credit      
Debt Instrument [Line Items]      
Interest rate at end of period, as a percent 3.72%    
Total debt at par value   $ 41,000