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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 122,513	$ (25,684)	$ 59,092	$ (26,083)
Other comprehensive income, net of tax	252	133	502	313
Ending balance	233,182	(18,248)	233,182	(18,248)
Reclassification of actuarial loss			(700)
Reclassification of actuarial loss, tax			200
Foreign currency, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			660
Other comprehensive income, net of tax			0
Ending balance	660		660
Defined benefit pension plan, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(36,855)
Other comprehensive income, net of tax			485
Ending balance	(36,370)		(36,370)
Other, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			203
Other comprehensive income, net of tax			17
Ending balance	220		220
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(35,742)	(34,383)	(35,992)	(34,563)
Ending balance	$ (35,490)	$ (34,250)	$ (35,490)	$ (34,250)

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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