Benefit Plans - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of employees' contribution	50.00%
Employer matching contribution, percent of employees' gross pay	6.00%
Employer discretionary contribution amount	$ 2,900,000	$ 2,300,000	$ 1,300,000
Medical, dental and accident and sickness benefit expense	18,000,000.0	13,700,000	15,300,000
Bonus liabilities	16,000,000.0	17,400,000
Expected future payment next year	109,600,000
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	900,000	0
Benefits paid	8,030,000	8,786,000
Benefit obligation	109,649,000	$ 113,634,000	$ 108,393,000
Estimated net loss to be amortized from accumulated other comprehensive loss over next fiscal year	500,000
Estimated future employer contributions in next fiscal year	$ 600,000