Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Income Tax Reconciliation [Abstract]
Income tax provision at federal statutory tax rate	$ 26,128	$ 29,429	$ 26,020
Impact of Partnership income not subject to federal income taxes	(31,604)	(30,851)	(26,444)
Permanent differences	104	131	174
Change in valuation allowance	6,721	1,174	570
State income taxes	552	717	929
Other	(129)	(171)	(139)
Provision for income taxes - current and deferred	$ 668	$ 429	$ 1,110