Leases - Operating lease options (Details) $ in Thousands	6 Months Ended
	Jul. 02, 2019 USD ($) lease	Jan. 01, 2019 USD ($)
Operating Leases
Initial term of leases, Restaurant locations	20 years
Renewal term of leases, Restaurant locations	5 years
Number of leases that have been executed but have not yet commenced | lease	2
Undiscounted fixed payments | $	$ 1,607,916	$ 938,374
Four Leases
Operating Leases
Number of leases that have been executed but have not yet commenced | lease	4
Undiscounted fixed payments | $	$ 30,500
Three Lease Options
Operating Leases
Initial term of leases, Restaurant locations	20 years
One Lease Option
Operating Leases
Initial term of leases, Restaurant locations	10 years