Number of Underperforming Restaurant Locations

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Restructuring Reserve, Reclassification of Lease Related Liabilities

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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The number of franchises purchased during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period.

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Restaurant Closure and Other Related Charges - Additional Information (Details) $ in Thousands	4 Months Ended	12 Months Ended
	Dec. 29, 2015 location	Dec. 31, 2019 USD ($) location	Jan. 01, 2019 USD ($) location	Jan. 02, 2018 USD ($) location	Jan. 03, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restaurant closure liability		$ 400	$ 2,400
Current portion of restaurant closure liability		129	623
Non-current portion of restaurant closure liability		308	1,788
Restaurant closure charges		0	(449)	$ (379)
Closure of 12 Underperforming Restaurants [Member]
Restructuring Cost and Reserve [Line Items]
Restaurant closure liability		437	2,092	1,611	$ 1,773
Adjustments to estimate based on current activity		508	747
Current portion of restaurant closure liability		100	500
Non-current portion of restaurant closure liability		300	1,600
Number of underperforming locations \| location	12
Adjustment to estimates based on current activity				144
Restaurant closure charges		$ 1,900	$ (61)	$ (70)
Franchise revenue
Restructuring Cost and Reserve [Line Items]
Franchise-operated restaurants acquired from franchisees \| location		4	3	1