Annual report pursuant to Section 13 and 15(d)

Debt - Covenants, Deferred Debt Issuance Cost And Original Issue Discount (Details)

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Debt - Covenants, Deferred Debt Issuance Cost And Original Issue Discount (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 27, 2018
Dec. 28, 2017
Dec. 29, 2016
Debt Instrument [Line Items]      
Amortization expense $ 1,045 $ 1,205 $ 954
ABL Facility      
Debt Instrument [Line Items]      
Percentage usage of facility to trigger covenant 90.00%    
Deferred debt issuance costs $ 902 1,005  
Term Loan Facility      
Debt Instrument [Line Items]      
Deferred debt issuance costs $ 3,666    
Prior Term Loan Facility And GCI Facility      
Debt Instrument [Line Items]      
Deferred debt issuance costs   $ 4,438