Adoption of ASU 2014-09, "Revenue from Contracts with Customers" – Transaction Price Allocated to Remaining Performance Obligations (Details) - USD ($) $ in Thousands	Dec. 30, 2018	Jan. 01, 2018
Performance Obligations by Period
Total deferred revenue	$ 35,141	$ 30,574
Franchise royalties and fees
Performance Obligations by Period
Less than 1 Year	2,443
1-2 Years	2,186
2-3 Years	1,960
3-4 Years	1,768
4-5 Years	1,488
Thereafter	3,829
Total deferred revenue	13,674
Area development fees
Performance Obligations by Period
Total deferred revenue	3,500
Customer loyalty program
Performance Obligations by Period
Total deferred revenue	$ 18,019	$ 14,724