Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use			$ 12,257		$ 17,139
Impairment of Long-Lived Assets to be Disposed of	$ 59	$ 1,131	1,211	$ 1,463	2,474
Impairment of long-lived assets	1,513	8,618	13,468	11,224	$ 19,613
Restaurants leased or subleased to franchisees
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	1,235	5,460	9,491	7,734
Company-owned restaurants
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 219	$ 2,027	$ 2,766	$ 2,027