Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Income Tax Reconciliation [Abstract]
Income tax provision at federal statutory tax rate	$ 22,663	$ 15,731	$ 26,128
Impact of Partnership income not subject to federal income taxes	(29,814)	(20,245)	(31,604)
Permanent differences	(280)	135	104
Change in valuation allowance	9,505	4,725	6,721
State income taxes	(547)	449	(552)
Other	(179)	(61)	(129)
Provision for income taxes - current and deferred	$ 1,348	$ 734	$ 668