Employee Benefit Plans - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Reconciliation of benefit obligations:
Ordinary benefits paid		$ (626)
Prior Service Credit		0
Reconciliation of fair value of plan assets:
Ordinary benefits paid		(626)
Pension Benefits [Member]
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	$ 75,851	103,115
Interest cost	3,306	2,459	$ 2,263
Actuarial (gain) loss	(1,670)	(20,763)
Lump sum benefits paid	(2,639)	(3,332)	(3,859)
Ordinary benefits paid	(5,476)	(5,628)
Prior Service Credit	0
Benefit obligation at end of year	69,372	75,851	103,115
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	55,091	77,892
Actual return on plan assets	364	(17,171)
Employer contributions	4,000	3,330	6,270
Lump sum benefits paid	(2,639)	(3,332)
Ordinary benefits paid	(5,476)	(5,628)
Fair value of plan assets at end of year	51,340	55,091	77,892
Funded status:
Funded status at end of year	(18,032)	(20,760)
Amounts recognized in consolidated balance sheets consist of:
Net amount recognized at end of year	(18,032)	(20,760)
Less: current portion	0	0
Noncurrent benefit liability	(18,032)	(20,760)
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):
Actuarial net (loss) gain	(15,190)	(17,797)
Prior service credits	0	0
Net amount recognized in accumulated other comprehensive (loss) income	(15,190)	(17,797)
Retiree Health and Life Benefits [Member]
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	3,712	4,962
Interest cost	166	81	77
Actuarial (gain) loss	(463)	(705)
Lump sum benefits paid	0	0
Ordinary benefits paid	(412)	(626)
Prior Service Credit	(132)
Benefit obligation at end of year	2,871	3,712	4,962
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	412	626
Lump sum benefits paid	0	0
Ordinary benefits paid	(412)	(626)
Fair value of plan assets at end of year	0	0	$ 0
Funded status:
Funded status at end of year	(2,871)	(3,712)
Amounts recognized in consolidated balance sheets consist of:
Net amount recognized at end of year	(2,871)	(3,712)
Less: current portion	422	627
Noncurrent benefit liability	(2,449)	(3,085)
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):
Actuarial net (loss) gain	4,133	4,445
Prior service credits	390	756
Net amount recognized in accumulated other comprehensive (loss) income	$ 4,523	$ 5,201