Revenue from Contracts with Customers - Change in Contract Liabilities (Details) - Franchise revenue - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 28, 2022	Sep. 29, 2021	Dec. 29, 2021
Change in Contract with Customer, Liability [Roll Forward]
Loyalty rewards liability, beginning balance	$ 6,328	$ 5,628	$ 5,628
Revenue recognized - beginning balance	(558)	(514)
Additional contract liability	618	1,330
Loyalty rewards liability, ending balance	$ 6,388	$ 6,444	$ 6,328

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044

Name:	us-gaap_ContractWithCustomerLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant