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. 30, 2024	Mar. 25, 2023	Mar. 30, 2024	Mar. 25, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		$ (10,498)	$ (12,432)	$ (10,667)	$ (12,596)
Reclassifications to earnings		169	163	338	327
Other comprehensive income		169	163	338	327
Balance ending		(10,329)	(12,269)	(10,329)	(12,269)
Pension Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		(14,765)	(17,315)	(15,190)	(17,797)
Reclassifications to earnings		426	481	851	963
Other comprehensive income		426	481	851	963
Balance ending		(14,339)	(16,834)	(14,339)	(16,834)
Post-Retirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		4,267	4,883	4,523	5,201
Other comprehensive income		(257)	(318)	(513)	(636)
Balance ending		4,010	4,565	4,010	4,565
Accumulated Defined Benefit Plans Adjustment Net Prior Service Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amortization of net gain and prior service credits	[1]	$ (257)	$ (318)	$ (513)	$ (636)

[1] These amounts are included in the computation of net periodic benefit cost. See Note 15, “Pension Plans and Other Postretirement Benefits.”