Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ (67,811)
Ending Balance	$ (61,928)		(61,928)
Defined Benefit Pension Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(55,501)	$ (37,379)	(56,154)	$ (38,427)
Amounts reclassified from other comprehensive loss and included in earnings	430	689	1,289	2,068
Total amount recognized in other comprehensive loss	430	689	1,289	2,068
Income tax expense	(103)	(165)	(309)	(496)
Ending Balance	(55,174)	(36,855)	(55,174)	(36,855)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(55,501)	(37,379)	(56,154)	(38,427)
Amounts reclassified from other comprehensive loss and included in earnings	430	689	1,289	2,068
Total amount recognized in other comprehensive loss	430	689	1,289	2,068
Income tax expense	(103)	(165)	(309)	(496)
Ending Balance	$ (55,174)	$ (36,855)	$ (55,174)	$ (36,855)

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

No definition available.

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

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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

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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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