Revenue Recognition - Transaction Price Allocated to Remaining Performance Obligations (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Dec. 27, 2020
Performance Obligations by Period
Total deferred revenue	$ 33,198	$ 33,254
Franchise royalties and fees
Performance Obligations by Period
Less than 1 Year	2,308
1-2 Years	2,105
2-3 Years	1,832
3-4 Years	1,613
4-5 Years	1,368
Thereafter	2,882
Total deferred revenue	12,108
Area development fees
Performance Obligations by Period
Total deferred revenue	1,600
Gift Card
Performance Obligations by Period
Total deferred revenue	$ 5,300