Acquisitions and Divestitures - Assets Held for Sale (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2015 restaurant	Dec. 27, 2015 USD ($) restaurant	Dec. 28, 2014 USD ($)	Dec. 29, 2013 USD ($)
Assets classified as held for sale
Total assets held for sale		$ 9,299
China Operations | International
Sale of restaurants
Number of restaurants expects to be sold | restaurant	45
Gain (loss) on assets transferred to held for sale		0
Assets classified as held for sale
Inventories		667
Prepaid expenses		672
Net property and equipment		5,571
Goodwill		1,690
Other assets		699
Total assets held for sale		9,299
Income statement disclosures related to operations held for sale
Income (loss) before income taxes		(1,200)	$ (3,400)	$ (2,700)
Impairment charge		$ 1,000
Number of restaurants for which impairment charges recorded | restaurant		11