Consolidated Statements of Comprehensive Income (Parenthetical) $ in Thousands		12 Months Ended
	Jun. 15, 2018 USD ($) restaurant	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($) restaurant	Dec. 31, 2017 USD ($)
Consolidated Statements of Comprehensive Income (Unaudited)
Income tax (benefit) expense		$ (611)	$ 2,624	$ 33,817
Stores in Beijing and Tianjin, China
Consolidated Statements of Comprehensive Income (Unaudited)
Number of Restaurants Sold | restaurant	34		34
Other Comprehensive Income (Loss), Foreign Currency Transaction And Translation Reclassification Adjustment From AOCI	$ 1,300		$ 1,300
Reversal of deferred tax related to foreign currency translation on refranchised stores	$ (300)
Qualifying as hedges | Interest rate swap | Amount reclassified from AOCL
Consolidated Statements of Comprehensive Income (Unaudited)
Net Interest income (expense)		660	(22)	(421)
Income tax (benefit) expense		$ 152	$ (5)	$ (156)