Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 253	$ 5,525	$ 763	$ 12,630
Restaurants leased or subleased to franchisees
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	0	5,490	0	12,491
Company-operated restaurants
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	201	35	218	35
Surplus properties
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 52	$ 0	$ 545	$ 104