Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)			3 Months Ended	12 Months Ended
	May 09, 2021	May 03, 2020	Mar. 28, 2020	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Property, plant and equipment, impairment charges				$ 516,000	$ 1,310,000	$ 0
Net book value of franchise rights acquired				$ 782,056,000	762,500,000
Franchise right maturity period				7 years
Net book value of goodwill				$ 157,374,000	155,617,000	157,916,000
Goodwill impairment	$ 0	$ 0			3,665,000
Revenue, practical expedient, remaining performance obligation, description				contracts with an original expected length of one year or less.
Revenue, remaining performance obligation, optional exemption, performance obligation				true
Total advertising expenses				$ 252,754,000	248,473,000	235,826,000
Deferred financing costs, amortization expense				6,136,000	8,845,000	9,318,000
Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Indefinite-lived intangible assets, impairment charges	$ 0	$ 0
United States
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				698,383,000	681,497,000
Net book value of goodwill				105,121,000	102,968,000
Canada
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				60,117,000	56,694,000
Net book value of goodwill				42,409,000	42,103,000
Canada | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				60,117,000
Indefinite-lived intangible assets, impairment charges				$ 0
Reporting units percentage of total franchise rights acquired				7.70%
Reporting unit, percentage of estimated fair value in excess of carrying amount				3.00%
United Kingdom
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				$ 12,187,000	12,318,000
Australia
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				6,529,000	6,907,000
New Zealand
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				4,840,000	5,084,000
New Zealand | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of franchise rights acquired				$ 4,840,000
Reporting units percentage of total franchise rights acquired				0.60%
Reporting unit, percentage of estimated fair value in excess of carrying amount	10.00%
Other Countries
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Net book value of goodwill				$ 9,844,000	10,546,000
All Units of Account Except New Zealand | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Reporting units percentage of total franchise rights acquired				99.40%
Brazil
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Goodwill impairment			$ 3,665,000
Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Property, plant and equipment, impairment charges				$ 5,000	$ 62,000	$ 307,000
Website development costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)				3 years
Minimum
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Equipment, estimated useful life (in years)				3 years
Finite-lived intangible assets, estimated useful life (in years)				3 years
Minimum | Goodwill
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Reporting unit, percentage of estimated fair value in excess of carrying amount	100.00%
Minimum | All Units of Account Except New Zealand | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Reporting unit, percentage of estimated fair value in excess of carrying amount	45.00%
Minimum | Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)				3 years
Maximum
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Equipment, estimated useful life (in years)				10 years
Finite-lived intangible assets, estimated useful life (in years)				20 years
Maximum | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)				1 year
Maximum | Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)				5 years