Revenue from Contracts with Customers - Change in Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 29, 2021	Dec. 30, 2020	Dec. 25, 2019
Gift card liability
Change in Contract with Customer, Liability [Roll Forward]
Revenue recognized - beginning balance	$ (1,218)	$ (1,028)	$ (871)
Franchise revenue
Change in Contract with Customer, Liability [Roll Forward]
Contract with Customer, Liability	5,628	6,317
Revenue recognized - beginning balance	(680)	(1,082)
Additional contract liability	1,380	398
Revenue recognized - additional contract liability		(5)
Contract with Customer, Liability	$ 6,328	$ 5,628	$ 6,317

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 http://asc.fasb.org/extlink&oid=123360276&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 http://asc.fasb.org/extlink&oid=123351226&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 http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044

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