Property and Equipment - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2021 USD ($) restaurant	Sep. 23, 2020 USD ($) restaurant	Sep. 29, 2021 USD ($) restaurant	Sep. 23, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 3,700	$ 4,100	$ 11,500	$ 12,600
Impairment of property and equipment	$ 34	1,506	$ 293	2,935
Number Of Restaurants Resulting In Impairment | restaurant			2
California
Property, Plant and Equipment [Line Items]
Impairment of property and equipment		$ 1,500	$ 300	$ 2,900
Number Of Restaurants Resulting In Impairment | restaurant	3	4	3
California | Maximum
Property, Plant and Equipment [Line Items]
Impairment of property and equipment	$ 100