Impairment Of Long-Lived Assets And Other Lease Charges (Details) $ in Thousands	3 Months Ended
	Apr. 03, 2022 USD ($) restaurant	Apr. 04, 2021 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment and other lease charges	$ 496	$ 353
Asset impairment charges	$ 200	$ 300
Underperforming Restaurants [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment charges, number of restaurants | restaurant	1
Initial Impairment Charge [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment and other lease charges	$ 100
Capital Expenditures At Underperforming Restaurants [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment charges	100
Other Lease Charges [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment charges	$ 300