Amounts Reclassified Out of Accumulated Other Comprehensive Income - Reclassification out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 30, 2023	Dec. 24, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		$ (10,667)	$ (12,596)
Reclassifications to earnings		169	164
Other comprehensive income		169	164
Balance ending		(10,498)	(12,432)
Pension Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		(15,190)	(17,797)
Reclassifications to earnings	[1]	425	482
Other comprehensive income		425	482
Balance ending		(14,765)	(17,315)
Post-Retirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance beginning		4,523	5,201
Other comprehensive income		(256)	(318)
Balance ending		4,267	4,883
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]	$ (256)	$ (318)

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