Retirement Plans (Reconciliation of Changes in Benefit Obligations, Plan Assets and Funded Status of Retirement Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Oct. 02, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	$ 275,143
Fair value at end of year	302,439	$ 275,143
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Net actuarial loss (gain)	9,856	(823)	$ (24,249)
Total recognized in OCI	7,721	(2,977)	(27,487)
Qualified Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	266,345	293,342
Interest cost	15,791	16,068	12,506
Participant contributions	0	0
Actuarial loss (gain)	29,769	(13,792)
Benefits paid	(13,985)	(14,884)
Settlements and other	0	(14,389)
Obligation at end of year	297,920	266,345	293,342
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	275,143	303,951
Actual return on plan assets	41,281	465
Participant contributions	0	0
Employer contributions	0	0
Benefits paid	(13,985)	(14,884)
Settlements and other	0	(14,389)
Fair value at end of year	302,439	275,143	303,951
Funded (unfunded) status at end of year	4,519	8,798
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	4,519	8,798
Current liabilities	0	0
Noncurrent liabilities	0	0
Total asset (liability) recognized	4,519	8,798
Unamortized actuarial loss (gain), net	100,938	99,871
Unamortized prior service cost	0	0
Total	100,938	99,871
Net actuarial loss (gain)	3,470	848
Amortization of actuarial (loss) gain	(2,403)	(2,349)
Amortization of prior service cost	0	0
Total recognized in OCI	1,067	(1,501)
Net periodic benefit (credit) cost	3,212	3,312	(3,404)
Total recognized in comprehensive income	4,279	1,811
Net actuarial loss (gain)	2,416
SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	53,513	56,891
Interest cost	3,188	3,149	2,173
Participant contributions	0	0
Actuarial loss (gain)	5,199	(1,287)
Benefits paid	(4,803)	(5,240)
Settlements and other	0	0
Obligation at end of year	57,097	53,513	56,891
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return on plan assets	0	0
Participant contributions	0	0
Employer contributions	4,803	5,240
Benefits paid	(4,803)	(5,240)
Settlements and other	0	0
Fair value at end of year	0	0	0
Funded (unfunded) status at end of year	(57,097)	(53,513)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	0	0
Current liabilities	(5,124)	(5,138)
Noncurrent liabilities	(51,973)	(48,375)
Total asset (liability) recognized	(57,097)	(53,513)
Unamortized actuarial loss (gain), net	18,542	13,974
Unamortized prior service cost	0	15
Total	18,542	13,989
Net actuarial loss (gain)	5,199	(1,287)
Amortization of actuarial (loss) gain	(632)	(718)
Amortization of prior service cost	(14)	(19)
Total recognized in OCI	4,553	(2,024)
Net periodic benefit (credit) cost	3,834	3,886	3,858
Total recognized in comprehensive income	8,387	1,862
Net actuarial loss (gain)	990
Postretirement Health Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	11,891	12,577
Interest cost	711	700	489
Participant contributions	102	101
Actuarial loss (gain)	1,186	(383)
Benefits paid	(1,268)	(1,145)
Settlements and other	32	41
Obligation at end of year	12,654	11,891	12,577
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return on plan assets	0	0
Participant contributions	102	101
Employer contributions	1,134	1,002
Benefits paid	(1,268)	(1,145)
Settlements and other	32	42
Fair value at end of year	0	0	0
Funded (unfunded) status at end of year	(12,654)	(11,891)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	0	0
Current liabilities	(1,111)	(1,072)
Noncurrent liabilities	(11,543)	(10,819)
Total asset (liability) recognized	(12,654)	(11,891)
Unamortized actuarial loss (gain), net	(8,132)	(10,232)
Unamortized prior service cost	0	0
Total	(8,132)	(10,232)
Net actuarial loss (gain)	1,186	(383)
Amortization of actuarial (loss) gain	914	932
Amortization of prior service cost	0	0
Total recognized in OCI	2,100	549
Net periodic benefit (credit) cost	(203)	(232)	$ (151)
Total recognized in comprehensive income	1,897	$ 317
Net actuarial loss (gain)	$ (778)