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Share-Based Compensation - Total Share-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 24, 2020	Jun. 30, 2021	Jun. 24, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation	$ 3,388	$ 1,511	$ 6,860	$ (26)
Employee share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation	3,164	1,326	6,417	(420)
Restricted stock units for board members
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation	$ 224	$ 185	$ 443	$ 394

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

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-SubTopic 10
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-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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.

+ References

No definition available.

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