Condensed Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Revenues:
Restaurant sales	$ 475,761	$ 443,961	$ 1,406,146	$ 1,285,382
Operating expenses:
Food, beverage and packaging costs	129,984	138,012	392,110	401,244
Restaurant wages and related expenses	153,712	148,838	455,305	439,773
Restaurant rent expense (Note 6)	32,207	31,244	96,221	93,487
Other restaurant operating expenses	74,685	70,237	217,528	204,676
Advertising expense	19,323	17,841	56,799	51,446
General and administrative expenses (including stock-based compensation of $1,870, $940, $3,969 and $3,817, respectively)	26,165	22,572	76,493	65,416
Depreciation and amortization	18,291	19,284	55,568	58,897
Impairment and other lease charges (Note 4)	1,591	1,196	5,680	19,868
Other income, net (Note 14)	(3,638)	(1,750)	(6,463)	(1,109)
Total operating expenses	452,320	447,474	1,349,241	1,333,698
Income (loss) from operations	23,441	(3,513)	56,905	(48,316)
Interest expense	7,189	7,896	23,089	22,968
Income (loss) before income taxes	16,252	(11,409)	33,816	(71,284)
Provision (benefit) for income taxes	3,634	(2,712)	5,380	(14,842)
Net income (loss)	$ 12,618	$ (8,697)	$ 28,436	$ (56,442)
Basic net income (loss) per share (in dollars per share)	$ 0.20	$ (0.17)	$ 0.44	$ (1.11)
Diluted net income (loss) per share (in shares)	$ 0.20	$ (0.17)	$ 0.44	$ (1.11)
Weighted average common shares outstanding:
Weighted average common shares outstanding (in shares)	51,560,307	50,805,461	51,506,367	50,689,730
Shares used in computing diluted net income (loss) per share (in shares)	62,827,875	50,805,461	62,124,464	50,689,730
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 12,618	$ (8,697)	$ 28,436	$ (56,442)
Change in valuation of interest rate swap (Note 7)	(472)	2,905	(904)	7,782
Comprehensive income (loss)	$ 12,146	$ (5,792)	$ 27,532	$ (48,660)