| Debt - Covenants, Deferred Debt Issuance Cost And Original Issue Discount (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2020 | Dec. 26, 2019 | Dec. 27, 2018 | |
| Debt Instrument [Line Items] | |||
| Amortization expense | $ 1,400 | $ 1,100 | $ 1,000 | 
| ABL Facility | |||
| Debt Instrument [Line Items] | |||
| Percentage usage of facility to trigger covenant | 90.00% | ||
| Deferred debt issuance costs | $ 975 | 574 | |
| Term Loan Facility | |||
| Debt Instrument [Line Items] | |||
| Deferred debt issuance costs | $ 9,000 | $ 2,900 | |
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- Definition Borrowing Requirement Of Credit Facility Percent Of Availability No definition available. 
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- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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