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Restructuring Costs (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 27, 2019	Dec. 27, 2019	Dec. 29, 2017	Dec. 29, 2019
Restructuring And Related Activities [Abstract]
Restructuring Costs	$ 3,300,000	$ 3,334,000	$ 1,300,000
Remaining restructuring commitments	$ 1,584,000	$ 1,584,000	$ 0	$ 1,600,000

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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