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Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Income Statement [Abstract]
Charge for restructuring	$ 3,300		$ 3,334		$ 1,300
Charge for asset impairments	$ 1,200	$ 6,300	$ 1,180	$ 6,269

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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- References

No definition available.

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X

- 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.

+ References

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