Revenues - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2024	Dec. 27, 2023	Dec. 28, 2022
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 452,334	$ 463,922	$ 456,429
Company restaurant sales
Disaggregation of Revenue [Line Items]
Total operating revenue	211,781	215,532	199,753
Royalties
Disaggregation of Revenue [Line Items]
Total operating revenue	118,705	120,131	113,891
Advertising revenue
Disaggregation of Revenue [Line Items]
Total operating revenue	79,973	78,494	75,926
Initial and other fees
Disaggregation of Revenue [Line Items]
Total operating revenue	8,711	13,882	28,262
Occupancy revenue
Disaggregation of Revenue [Line Items]
Total operating revenue	33,164	35,883	38,597
Franchise and license revenue
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 240,553	$ 248,390	$ 256,676