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Restructuring Costs (Schedule of Activity in Restructuring Expense Accruals) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	12 Months Ended
	Sep. 25, 2020	Jun. 26, 2020	Mar. 27, 2020	Jun. 26, 2020	Dec. 27, 2019
Restructuring Cost And Reserve [Line Items]
Accrual beginning balance	$ 3,231	$ 526	$ 1,584	$ 1,584
Additions		5,034			$ 3,300
Expenditures	(2,051)	(2,329)	(1,058)
Accrual ending balance	1,180	3,231	526	3,231	1,584
Severance and Other Employee Costs [Member]
Restructuring Cost And Reserve [Line Items]
Accrual beginning balance	3,018	257	1,247	1,247
Additions		5,034
Expenditures	(2,020)	(2,273)	(990)
Accrual ending balance	998	3,018	257	3,018	1,247
Exit Closure and Consolidation of Facilities [Member]
Restructuring Cost And Reserve [Line Items]
Accrual beginning balance	213	269	337	337
Expenditures	(31)	(56)	(68)
Accrual ending balance	$ 182	$ 213	$ 269	$ 213	$ 337

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-Section 45
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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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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

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