Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)			3 Months Ended		6 Months Ended
	May 09, 2021	May 03, 2020	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Jan. 02, 2021
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise right maturity period	7 years
Goodwill			$ 156,754,000		$ 156,754,000		$ 155,617,000
Goodwill impairment						$ 3,665,000
Finite-lived intangible assets, aggregate amortization expense			8,035,000	$ 7,386,000	16,033,000	14,551,000
Franchise Rights
Goodwill And Intangible Assets Disclosure [Line Items]
Indefinite-lived intangible assets, impairment charges	$ 0	$ 0
United States
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					698,383,000
Goodwill			102,968,000		102,968,000
Canada
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					61,644,000
Goodwill			$ 43,486,000		43,486,000
United Kingdom
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					12,459,000
Australia
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					6,766,000
New Zealand
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					4,976,000
New Zealand | Franchise Rights
Goodwill And Intangible Assets Disclosure [Line Items]
Franchise rights acquired					$ 4,976,000
Percentage of franchise rights acquired			0.60%		0.60%
Percentage of estimated fair value in excess of carrying amount			10.00%		10.00%
Other Countries
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill			$ 10,300,000		$ 10,300,000
All Units of Account Except New Zealand | Franchise Rights
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage of franchise rights acquired			99.40%		99.40%
Brazil
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment						$ 3,665,000
Minimum | Goodwill
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage of estimated fair value in excess of carrying amount			100.00%		100.00%
Minimum | All Units of Account Except New Zealand | Franchise Rights
Goodwill And Intangible Assets Disclosure [Line Items]
Percentage of estimated fair value in excess of carrying amount			45.00%		45.00%
Franchise Rights | Maximum
Goodwill And Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)					1 year