Summary of Refranchisings and Franchise Acquisitions (Purchase Price Allocations on Franchise Acquisitions) (Details) $ in Thousands	12 Months Ended
Oct. 02, 2022 USD ($) restaurant	Oct. 03, 2021 USD ($) restaurant	Sep. 27, 2020 USD ($) restaurant
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Number of restaurants acquired from franchisees \| restaurant	13	20	8
Goodwill	$ 366,821	$ 47,774	$ 47,161
Gains on the acquisition of franchise-operated restaurants	(309)	(340)	0
Franchise Acquisitions
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Inventory	0	258	73
Property and equipment	540	1,136	903
Intangible assets	66	245	263
Other assets	0	10	6
Goodwill	0	613	414
Liabilities assumed	0	(277)	(800)
Total consideration	$ 297	$ 1,645	$ 859

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of franchises purchased during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period.

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