Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 4,697	$ 4,097	$ 16,241
Properties and Other Intangible Assets, Franchisee Leased / Subleased Assets
Impairment of Long-Lived Assets
Impairment of long-lived assets	283	244	14,010
Properties and Other Intangible Assets, Operating Restaurants
Impairment of Long-Lived Assets
Impairment of long-lived assets	4,060	3,169	1,918
Surplus Properties
Impairment of Long-Lived Assets
Impairment of long-lived assets	354	684	313
Impairment of long-lived assets
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 4,697	$ 4,097	$ 16,241