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Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
May 08, 2022
May 09, 2021
Aug. 10, 2018
Oct. 01, 2022
Jul. 02, 2022
Oct. 02, 2021
Oct. 01, 2022
Oct. 02, 2021
Jan. 01, 2022
Jan. 02, 2021
Goodwill And Intangible Assets Disclosure [Line Items]                    
Franchise right maturity period             7 years      
Net book value of goodwill       $ 156,155,000     $ 156,155,000   $ 157,374,000 $ 155,617,000
Goodwill impairment $ 0 $ 0         1,101,000      
Finite-lived intangible assets, aggregate amortization expense       8,347,000   $ 8,032,000 25,282,000 $ 24,066,000    
Kurbo Health, Inc                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of goodwill     $ 1,101,000              
Net purchase price     $ 3,063,000              
Kurbo, Inc                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Goodwill impairment         $ 1,101,000          
Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Indefinite-lived intangible assets, impairment charges   $ 0                
Franchise Rights | Other Units of Account                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Indefinite-lived intangible assets, impairment charges $ 0                  
United States                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of goodwill       104,019,000     104,019,000      
United States | Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       400,092,000     400,092,000      
Indefinite-lived intangible assets, impairment charges       298,291,000            
Percentage of estimated fair value in excess of carrying amount 15.00%                  
Canada                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of goodwill       38,759,000     38,759,000      
Canada | Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       19,342,000     19,342,000      
Indefinite-lived intangible assets, impairment charges       13,312,000 24,485,000          
United Kingdom | Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       10,061,000     10,061,000      
Australia | Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       5,753,000     5,753,000      
New Zealand | Franchise Rights                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       2,141,000     2,141,000      
Indefinite-lived intangible assets, impairment charges       1,138,000 $ 834,000          
Other Countries                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of goodwill       $ 13,377,000     $ 13,377,000      
All Reporting Units Except for Republic of Ireland                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Percentage of goodwill held       97.40%     97.40%      
Republic of Ireland                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of goodwill       $ 4,009,000     $ 4,009,000      
Percentage of goodwill held       2.60%     2.60%      
Percentage of estimated fair value in excess of carrying amount 14.00%                  
Minimum | Franchise Rights | Other Units of Account                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Percentage of estimated fair value in excess of carrying amount 100.00%                  
Minimum | All Reporting Units Except for Republic of Ireland | Goodwill                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Percentage of estimated fair value in excess of carrying amount 35.00%                  
Franchise Rights | Other Units of Account                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Percentage of franchise rights acquired         2.20%          
Franchise Rights | United States                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       $ 400,092,000 $ 698,383,000   $ 400,092,000      
Percentage of estimated fair value equal to carrying amount       91.50% 92.70%   91.50%      
Franchise Rights | Canada                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       $ 19,342,000 $ 34,556,000   $ 19,342,000      
Percentage of estimated fair value equal to carrying amount       4.40% 4.60%   4.40%      
Franchise Rights | New Zealand                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Net book value of franchise rights acquired       $ 2,141,000 $ 3,574,000   $ 2,141,000      
Percentage of estimated fair value equal to carrying amount       0.50% 0.50%   0.50%      
Franchise Rights | Maximum                    
Goodwill And Intangible Assets Disclosure [Line Items]                    
Finite-lived intangible assets, estimated useful life (in years)             1 year