Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 26, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 242,449	$ 211,406
Restaurant sales
Disaggregation of Revenue [Line Items]
Total revenues	239,308	207,968
In-restaurant dining sales
Disaggregation of Revenue [Line Items]
Total revenues	195,199	169,229
Third-party delivery sales
Disaggregation of Revenue [Line Items]
Total revenues	25,935	22,314
Take-out sales
Disaggregation of Revenue [Line Items]
Total revenues	18,174	16,425
Franchise revenues
Disaggregation of Revenue [Line Items]
Total revenues	3,141	3,438
Royalty and system fund contributions
Disaggregation of Revenue [Line Items]
Total revenues	3,009	3,361
Initial fees
Disaggregation of Revenue [Line Items]
Total revenues	102	77
Business combinations - revenues recognized
Disaggregation of Revenue [Line Items]
Total revenues	$ 30	$ 0