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Amounts Reclassified Out of Accumulated Other Comprehensive Income - Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 29, 2025	Mar. 30, 2024	Mar. 29, 2025	Mar. 30, 2024
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period				$ (6,147)
Other comprehensive (loss) income		$ (117)	$ 169	(233)	$ 338
Balance, end of period		(6,380)		(6,380)
Pension Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period		(9,747)	(14,765)	(9,809)	(15,190)
Reclassifications to earnings	[1]	61	426	123	851
Other comprehensive (loss) income		61	426	123	851
Balance, end of period		(9,686)	(14,339)	(9,686)	(14,339)
Postretirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period		3,484	4,267	3,662	4,523
Amortization of net gain and prior service credits	[1]	(178)	(257)	(356)	(513)
Other comprehensive (loss) income		(178)	(257)	(356)	(513)
Balance, end of period		3,306	4,010	3,306	4,010
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period		(6,263)	(10,498)	(6,147)	(10,667)
Reclassifications to earnings		(117)	169	(233)	338
Other comprehensive (loss) income		(117)	169	(233)	338
Balance, end of period		$ (6,380)	$ (10,329)	$ (6,380)	$ (10,329)
[1] These amounts are included in the computation of net periodic benefit cost. See Note 15, “Pension Plans and Other Postretirement Benefits.”

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