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Retirement Plans (Reconciliation of Changes in Benefit Obligations, Plan Assets and Funded Status of Retirement Plans) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Oct. 01, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value at beginning of year $ 302,439    
Fair value at end of year 290,569 $ 302,439  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]      
Net actuarial loss (gain) (7,705) 9,856 $ (823)
Total recognized in OCI (10,333) 7,721 (2,977)
Qualified Plan      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Obligation at beginning of year 297,920 266,345  
Interest cost 14,825 15,791 16,068
Participant contributions 0 0  
Actuarial (gain) loss (17,080) 29,769  
Benefits paid (14,275) (13,985)  
Settlements and other 0 0  
Obligation at end of year 281,390 297,920 266,345
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value at beginning of year 302,439 275,143  
Actual return on plan assets 2,405 41,281  
Participant contributions 0 0  
Employer contributions 0 0  
Benefits paid (14,275) (13,985)  
Settlements and other 0 0  
Fair value at end of year 290,569 302,439 275,143
Funded (unfunded) status at end of year 9,179 4,519  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]      
Noncurrent assets 9,179 4,519  
Current liabilities 0 0  
Noncurrent liabilities 0 0  
Total asset (liability) recognized 9,179 4,519  
Unamortized actuarial loss (gain), net 94,069 100,938  
Unamortized prior service cost 0 0  
Total 94,069 100,938  
Net actuarial loss (gain) (4,453) 3,470  
Amortization of actuarial (loss) gain (2,416) (2,403)  
Amortization of prior service cost 0 0  
Total recognized in OCI (6,869) 1,067  
Net periodic benefit (credit) cost 2,209 3,212 3,312
Total recognized in comprehensive income (4,660) 4,279  
SERP      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Obligation at beginning of year 57,097 53,513  
Interest cost 2,778 3,188 3,149
Participant contributions 0 0  
Actuarial (gain) loss (3,572) 5,199  
Benefits paid (5,169) (4,803)  
Settlements and other 0 0  
Obligation at end of year 51,134 57,097 53,513
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 5,169 4,803  
Benefits paid (5,169) (4,803)  
Settlements and other 0 0  
Fair value at end of year 0 0 0
Funded (unfunded) status at end of year (51,134) (57,097)  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]      
Noncurrent assets 0 0  
Current liabilities (4,814) (5,124)  
Noncurrent liabilities (46,320) (51,973)  
Total asset (liability) recognized (51,134) (57,097)  
Unamortized actuarial loss (gain), net 13,980 18,542  
Unamortized prior service cost 0 0  
Total 13,980 18,542  
Net actuarial loss (gain) (3,572) 5,199  
Amortization of actuarial (loss) gain (990) (632)  
Amortization of prior service cost 0 (14)  
Total recognized in OCI (4,562) 4,553  
Net periodic benefit (credit) cost 3,768 3,834 3,886
Total recognized in comprehensive income (794) 8,387  
Postretirement Health Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Obligation at beginning of year 12,654 11,891  
Interest cost 615 711 700
Participant contributions 103 102  
Actuarial (gain) loss 320 1,186  
Benefits paid (1,445) (1,268)  
Settlements and other 116 32  
Obligation at end of year 12,363 12,654 11,891
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 103 102  
Employer contributions 1,226 1,134  
Benefits paid (1,445) (1,268)  
Settlements and other 116 32  
Fair value at end of year 0 0 0
Funded (unfunded) status at end of year (12,363) (12,654)  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]      
Noncurrent assets 0 0  
Current liabilities (1,140) (1,111)  
Noncurrent liabilities (11,223) (11,543)  
Total asset (liability) recognized (12,363) (12,654)  
Unamortized actuarial loss (gain), net (7,034) (8,132)  
Unamortized prior service cost 0 0  
Total (7,034) (8,132)  
Net actuarial loss (gain) 320 1,186  
Amortization of actuarial (loss) gain 778 914  
Amortization of prior service cost 0 0  
Total recognized in OCI 1,098 2,100  
Net periodic benefit (credit) cost (163) (203) $ (232)
Total recognized in comprehensive income $ 935 $ 1,897