Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 6,999	$ 4,697	$ 4,097
Restaurants leased or subleased to franchisees
Impairment of Long-Lived Assets
Impairment of long-lived assets	5,308	283	244
Company-operated restaurants
Impairment of Long-Lived Assets
Impairment of long-lived assets	294	4,060	3,169
Surplus properties
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 1,397	$ 354	$ 684