Leases Weighted average lease term and discount rate (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 27, 2020 |
Dec. 29, 2019 |
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| Leases [Abstract] | ||
| Operating Lease, Payments | $ 23,021 | $ 25,781 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | $ 3,845 | $ 177,701 |
| X | ||||||||||
- References No definition available.
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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