Employee Benefit Plans - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 26, 2020
Pension Benefits [Member]
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	$ 103,115	$ 115,232
Interest cost	2,459	2,263	$ 2,726
Actuarial (gain) loss	(20,763)	(4,461)
Lump sum benefits paid	(3,332)	(3,859)	(3,623)
Ordinary benefits paid	(5,628)	(6,060)
Benefit obligation at end of year	75,851	103,115	115,232
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	77,892	80,001
Actual gain return on plan assets	(17,171)	1,540
Employer contributions	3,330	6,270	3,835
Lump sum benefits paid	(3,332)	(3,859)
Ordinary benefits paid	(5,628)	(6,060)
Fair value of plan assets at end of year	55,091	77,892	80,001
Funded status:
Funded status at end of year	(20,760)	(25,223)
Amounts recognized in consolidated balance sheets consist of:
Net amount recognized at end of year	(20,760)	(25,223)
Less: current portion	0	0
Noncurrent benefit liability	(20,760)	(25,223)
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):
Actuarial net (loss) gain	(17,797)	(23,303)
Prior service credits	0	0
Net amount recognized in accumulated other comprehensive (loss) income	(17,797)	(23,303)
Retiree Health and Life Benefits [Member]
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	4,962	5,999
Interest cost	81	77	151
Actuarial (gain) loss	(705)	(431)
Lump sum benefits paid	0	0
Ordinary benefits paid	(626)	(683)
Benefit obligation at end of year	3,712	4,962	5,999
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	0	0
Actual gain return on plan assets	0	0
Employer contributions	626	683
Lump sum benefits paid	0	0
Ordinary benefits paid	(626)	(683)
Fair value of plan assets at end of year	0	0	$ 0
Funded status:
Funded status at end of year	(3,712)	(4,962)
Amounts recognized in consolidated balance sheets consist of:
Net amount recognized at end of year	(3,712)	(4,962)
Less: current portion	627	710
Noncurrent benefit liability	(3,085)	(4,252)
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):
Actuarial net (loss) gain	4,445	4,465
Prior service credits	756	1,255
Net amount recognized in accumulated other comprehensive (loss) income	$ 5,201	$ 5,720