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Employee Benefit Plans - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Pension Benefits [Member]      
Reconciliation of benefit obligations:      
Benefit obligation at beginning of year $ 65,405 $ 69,372  
Interest cost 2,577 3,129 $ 3,306
Actuarial (gain) loss (1,888) 2,012  
Lump sum benefits paid (3,441) (3,917) (2,639)
Ordinary benefits paid (4,882) (5,191)  
Prior Service Credit 0 0  
Benefit obligation at end of year 57,771 65,405 69,372
Reconciliation of fair value of plan assets:      
Fair value of plan assets at beginning of year 52,758 [1],[2] 51,340  
Actual return on plan assets (260) 6,526  
Employer contributions 4,000 4,000 4,000
Lump sum benefits paid (3,441) (3,917)  
Ordinary benefits paid (4,882) (5,191)  
Fair value of plan assets at end of year 48,175 [1],[2] 52,758 [1],[2] 51,340
Funded status:      
Funded status at end of year (9,596) (12,647)  
Amounts recognized in consolidated balance sheets consist of:      
Net amount recognized at end of year (9,596) (12,647)  
Less: current portion 0 0  
Noncurrent benefit liability (9,596) (12,647)  
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):      
Actuarial net (loss) gain (8,697) (9,809)  
Prior service credits 0 0  
Net amount recognized in accumulated other comprehensive (loss) income (8,697) (9,809)  
Retiree Health and Life Benefits [Member]      
Reconciliation of benefit obligations:      
Benefit obligation at beginning of year 2,528 2,871  
Interest cost 100 143 166
Actuarial (gain) loss (278) (164)  
Lump sum benefits paid 0 0  
Ordinary benefits paid (277) (322)  
Prior Service Credit 14 0  
Benefit obligation at end of year 2,087 2,528 2,871
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 277 322  
Lump sum benefits paid 0 0  
Ordinary benefits paid (277) (322)  
Fair value of plan assets at end of year 0 0 $ 0
Funded status:      
Funded status at end of year (2,087) (2,528)  
Amounts recognized in consolidated balance sheets consist of:      
Net amount recognized at end of year (2,087) (2,528)  
Less: current portion 289 342  
Noncurrent benefit liability (1,798) (2,186)  
Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (loss):      
Actuarial net (loss) gain 3,148 3,556  
Prior service credits 66 106  
Net amount recognized in accumulated other comprehensive (loss) income $ 3,214 $ 3,662  
[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.