Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Revenues from External Customers and Long-Lived Assets
Revenues	$ 397,820	$ 400,550	$ 411,002	$ 380,564	$ 309,247	$ 308,000	$ 320,342	$ 285,819	$ 1,589,936	$ 1,223,408	$ 1,435,418
Properties	1,213,236				1,263,059				1,213,236	1,263,059	1,192,339
U.S.
Revenues from External Customers and Long-Lived Assets
Revenues									1,495,639	1,154,873	1,373,345
Properties	1,176,149				1,226,714				1,176,149	1,226,714	1,162,006
Canada
Revenues from External Customers and Long-Lived Assets
Revenues									74,626	50,431	45,959
Properties	36,967				36,213				36,967	36,213	30,257
Other International
Revenues from External Customers and Long-Lived Assets
Revenues									19,671	18,104	16,114
Properties	$ 120				$ 132				$ 120	$ 132	$ 76