Company-owned Store Transactions - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 29, 2019 USD ($) Store	Dec. 30, 2018 USD ($) Store	Dec. 31, 2017 USD ($) Store	Jun. 16, 2019 Store
Number of company-owned stores sold | Store	62	12	17	59
Consideration For Sale Of Stores	$ 12,300
Proceeds from sale of assets	12,258	$ 8,367	$ 6,835
Pre-tax gain (loss) on sale of assets, net of goodwill reduction, charged to general and administrative expenses	(300)	5,900	4,000
Reduction of goodwill related to sale of stores	$ 1,500	400	600
US Franchisee [Member]
Number of stores purchased | Store	3
Payment for purchase of productive assets	$ 3,400
Value of goodwill purchased	1,700
Value of intangibles purchased	1,300
Value of leasehold and other assets purchased	$ 400
Franchisee [Member]
Proceeds from sale of assets		$ 300
Number of stores closed | Store		2
Pre-tax gain (loss) on sale of assets, net of goodwill reduction, charged to general and administrative expenses		$ 100
Reduction of goodwill related to sale of stores		100
Franchisee Sale Two Thousand Eighteen [Member]
Proceeds from sale of assets		$ 7,900
Franchisee Sale Two Thousand Seventeen [Member]
Proceeds from sale of assets			$ 6,800