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Employee Benefit Plans - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 28, 2024
Sep. 30, 2023
Sep. 24, 2022
Pension Benefits [Member]      
Reconciliation of benefit obligations:      
Benefit obligation at beginning of year $ 69,372 $ 75,851  
Interest cost 3,129 3,306 $ 2,459
Actuarial loss (gain) 2,012 (1,670)  
Lump sum benefits paid (3,917) (2,639) (3,332)
Ordinary benefits paid (5,191) (5,476)  
Prior Service Credit 0 0  
Benefit obligation at end of year 65,405 69,372 75,851
Reconciliation of fair value of plan assets:      
Fair value of plan assets at beginning of year 51,340 [1],[2] 55,091  
Actual return on plan assets 6,526 364  
Employer contributions 4,000 4,000 3,330
Lump sum benefits paid (3,917) (2,639)  
Ordinary benefits paid (5,191) (5,476)  
Fair value of plan assets at end of year 52,758 [1],[2] 51,340 [1],[2] 55,091
Funded status:      
Funded status at end of year (12,647) (18,032)  
Amounts recognized in consolidated balance sheets consist of:      
Net amount recognized at end of year (12,647) (18,032)  
Less: current portion 0 0  
Noncurrent benefit liability (12,647) (18,032)  
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):      
Actuarial net (loss) gain (9,809) (15,190)  
Prior service credits 0 0  
Net amount recognized in accumulated other comprehensive (loss) income (9,809) (15,190)  
Retiree Health and Life Benefits [Member]      
Reconciliation of benefit obligations:      
Benefit obligation at beginning of year 2,871 3,712  
Interest cost 143 166 81
Actuarial loss (gain) (164) (463)  
Lump sum benefits paid 0 0  
Ordinary benefits paid (322) (412)  
Prior Service Credit 0 (132)  
Benefit obligation at end of year 2,528 2,871 3,712
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 322 412  
Lump sum benefits paid 0 0  
Ordinary benefits paid (322) (412)  
Fair value of plan assets at end of year 0 0 $ 0
Funded status:      
Funded status at end of year (2,528) (2,871)  
Amounts recognized in consolidated balance sheets consist of:      
Net amount recognized at end of year (2,528) (2,871)  
Less: current portion 342 422  
Noncurrent benefit liability (2,186) (2,449)  
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):      
Actuarial net (loss) gain 3,556 4,133  
Prior service credits 106 390  
Net amount recognized in accumulated other comprehensive (loss) income $ 3,662 $ 4,523  
[1] Includes funds which are not publicly traded and are valued at the net asset value of the units provided by the fund issuer.
[2] Includes funds which invest primarily in publicly traded and non-publicly traded, investment grade corporate bonds, U.S. government bonds and asset-backed securities.