Share-Based Compensation (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended
Mar. 25, 2020	Mar. 27, 2019
Total share-based compensation [Abstract]
Total share-based compensation	$ (1,537)	$ 2,253
Performance share awards
Total share-based compensation [Abstract]
Total share-based compensation	$ (1,746)	1,998
Restricted Stock Units [Abstract]
Common stock, shares issued (in shares)	0.3
Shares paid for tax withholding (in shares)	0.1
Unrecognized compensation cost related to unvested share awards outstanding	$ 4,900
Unrecognized compensation cost, expected weighted average period	1 year 6 months
Restricted stock units for board members
Total share-based compensation [Abstract]
Total share-based compensation	$ 209	$ 255
Restricted Stock Units [Abstract]
Unrecognized compensation cost related to unvested share awards outstanding	$ 100
Unrecognized compensation cost, expected weighted average period	2 months 12 days

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

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=116856206&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Number of shares issued under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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