Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Jan. 01, 2017	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 3,250	$ 5,525	$ 7,105	$ 4,097	$ 16,241	$ 25,001
Properties and Other Intangible Assets, Franchisee Leased / Subleased Assets
Impairment of Long-Lived Assets
Impairment of long-lived assets				244	14,010	19,214
Properties and Other Intangible Assets, Operating Restaurants
Impairment of Long-Lived Assets
Impairment of long-lived assets				3,169	1,918	3,132
Surplus Properties
Impairment of Long-Lived Assets
Impairment of long-lived assets				684	313	2,655
Impairment of long-lived assets
Impairment of Long-Lived Assets
Impairment of long-lived assets				$ 4,097	$ 16,241	$ 25,001