Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2021	Dec. 30, 2020	Dec. 25, 2019
Revenue
Total revenue	$ 454,363	$ 426,087	$ 442,330
Cost of operations
Food and paper cost	104,394	98,774	109,264
Labor and related expenses	120,308	114,455	116,703
Occupancy and other operating expenses	97,557	92,422	92,005
Gain on recovery of insurance proceeds, lost profits	0	(2,000)	0
Company restaurant expenses	322,259	303,651	317,972
General and administrative expenses	39,852	35,918	40,389
Legal settlements	0	2,566	0
Franchise expenses	32,831	28,761	27,612
Depreciation and amortization	15,176	16,878	17,855
Loss on disposal of assets	289	189	266
Recovery of securities lawsuits related legal expenses and other insurance claims	0	(123)	(10,000)
Loss on disposition of restaurants	1,534	0	5,058
Impairment and closed-store reserves	1,087	4,691	4,852
Total expenses	413,028	392,531	404,004
Income from operations	41,335	33,556	38,326
Interest expense, net	1,824	3,292	3,687
Income tax receivable agreement expense	58	139	57
Income before provision for income taxes	39,453	30,125	34,582
Provision for income taxes	10,332	5,651	9,682
Net income	$ 29,121	$ 24,474	$ 24,900
Net income per share
Basic (usd per share)	$ 0.81	$ 0.70	$ 0.68
Diluted (usd per share)	$ 0.80	$ 0.68	$ 0.67
Weighted-average shares used in computing net income per share
Basic (shares)	35,973,892	35,193,325	36,739,209
Diluted (shares)	36,446,756	35,796,406	37,441,503
Company-operated restaurant revenue
Revenue
Total revenue	$ 394,733	$ 374,064	$ 391,112
Franchise revenue
Revenue
Total revenue	33,729	29,418	28,819
Franchise advertising fee revenue
Revenue
Total revenue	$ 25,901	$ 22,605	$ 22,399