CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2024	Dec. 27, 2023	Dec. 28, 2022
Revenue
Total revenue	$ 473,008	$ 468,664	$ 469,959
Cost of operations
Food and paper cost	100,725	108,250	117,774
Labor and related expenses	127,179	127,244	130,773
Occupancy and other operating expenses	99,280	101,398	101,543
Gain on recovery of insurance proceeds, lost profits, net		(327)
Company restaurant expenses	327,184	336,565	350,090
General and administrative expenses	46,270	42,025	39,093
Franchise expenses	42,307	38,404	36,169
Depreciation and amortization	15,717	15,235	14,418
Loss on disposal of assets	221	192	165
Gain on recovery of insurance proceeds, property, equipment and expenses	(41)	(247)
Loss (gain) on disposition of restaurants	7	(5,034)	(848)
Impairment and closed-store reserves	175	1,732	752
Total expenses	431,840	428,872	439,839
Income from operations	41,168	39,792	30,120
Interest expense, net	5,899	4,811	1,677
Income tax receivable agreement (income) expense	(20)	103	(436)
Income before provision for income taxes	35,289	34,878	28,879
Provision for income taxes	9,605	9,324	8,078
Net income	$ 25,684	$ 25,554	$ 20,801
Net income per share
Basic (usd per share)	$ 0.86	$ 0.75	$ 0.57
Diluted (usd per share)	$ 0.86	$ 0.74	$ 0.57
Weighted-average shares used in computing net income per share
Basic (shares)	29,850,256	34,253,542	36,350,579
Diluted (shares)	30,034,978	34,374,706	36,575,904
Company-operated restaurant revenue
Revenue
Total revenue	$ 396,260	$ 398,437	$ 403,218
Franchise revenue
Revenue
Total revenue	45,561	41,002	38,225
Franchise advertising fee revenue
Revenue
Total revenue	$ 31,187	$ 29,225	$ 28,516