Acquisitions (Details) $ in Thousands	9 Months Ended
	Oct. 02, 2016 USD ($) Restaurant	Sep. 27, 2015 USD ($) Restaurant	Jan. 03, 2016 USD ($)
Identifiable assets acquired and liabilities assumed:
Goodwill	$ 742,234		$ 770,781
Acquisitions [Member]
Business Acquisition [Line Items]
Restaurants acquired from franchisees | Restaurant	2	4
Total consideration paid, net of cash received	$ 2,209	$ 1,232
Identifiable assets acquired and liabilities assumed:
Properties	2,218	1,303
Acquired franchise rights	0	760
Other assets	9	0
Capital lease obligations	0	(438)
Unfavorable leases	0	(440)
Other liabilities	(18)	(80)
Total identifiable net assets	2,209	1,105
Goodwill	$ 0	$ 127