Business Combination (Estimated Fair Value of Assets and Liabilities) (Details) - USD ($) $ in Thousands	Oct. 02, 2022	Mar. 08, 2022	Oct. 01, 2023	Oct. 03, 2021
Liabilities:
Goodwill	$ 366,821		$ 329,986	$ 47,774
Del Taco
Business Acquisition [Line Items]
Cash acquired		$ 12,068
Total aggregate purchase consideration, net of $12,068 cash acquired	$ 581,241
Assets:
Accounts and other receivables			4,583
Inventory			3,233
Prepaid expenses			2,950
Other current assets			105
Property and equipment			145,032
Operating lease right-of-use assets			350,289
Intangible assets			12,371
Trademarks			283,500
Other assets			5,128
Liabilities:
Current maturities of long-term debt			22
Current operating lease liabilities			21,991
Accounts payable			18,808
Accrued liabilities			112,579
Long-term debt, net of current maturities			349
Long-term operating lease liabilities, net of current portion			303,488
Deferred tax liabilities			75,355
Other long-term liabilities			13,080
Net assets acquired, excluding goodwill			261,519
Goodwill			$ 319,722