Consolidated Statements Of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Revenues:
Revenue	$ 485,223,000	$ 441,945,000	$ 930,385,000	$ 841,421,000
Costs and expenses:
Food, beverage and packaging costs	136,683,000	140,175,000	262,126,000	263,232,000
Restaurant wages and related expenses	155,269,000	149,315,000	301,593,000	290,935,000
Restaurant rent expense (Note 6)	32,180,000	31,230,000	64,014,000	62,243,000
Other restaurant operating expenses	73,711,000	69,032,000	142,843,000	134,439,000
Advertising expense	19,578,000	17,641,000	37,476,000	33,605,000
General and administrative expenses (including stock-based compensation of $1,002, $936, $2,099 and $2,877, respectively)	24,588,000	20,827,000	50,328,000	42,844,000
Depreciation and amortization	18,559,000	20,071,000	37,277,000	39,613,000
Impairment and other lease charges (Note 4)	2,749,000	18,176,000	4,089,000	18,672,000
Other (income) expense, net (Note 14)	(1,319,000)	439,000	(2,825,000)	641,000
Total operating expenses	461,998,000	466,906,000	896,921,000	886,224,000
Income (loss) from operations	23,225,000	(24,961,000)	33,464,000	(44,803,000)
Interest expense	7,667,000	7,636,000	15,900,000	15,072,000
Income (loss) before income taxes	15,558,000	(32,597,000)	17,564,000	(59,875,000)
Provision (benefit) for income taxes	604,000	(6,121,000)	1,746,000	(12,130,000)
Net income (loss)	$ 14,954,000	$ (26,476,000)	$ 15,818,000	$ (47,745,000)
Basic net income (loss) per share (in dollars per share)	$ 0.23	$ (0.52)	$ 0.25	$ (0.94)
Diluted net income (loss) per share (in shares)	$ 0.23	$ (0.52)	$ 0.25	$ (0.94)
Weighted average common shares outstanding:
Weighted average common shares outstanding (in shares)	51,535,242	50,795,328	51,479,396	50,634,008
Shares used in computing diluted net income (loss) per share (in shares)	62,123,941	50,795,328	61,772,757	50,634,008
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 14,954,000	$ (26,476,000)	$ 15,818,000	$ (47,745,000)
Change in valuation of interest rate swap (Note 7)	705,000	595,000	(432,000)	4,877,000
Comprehensive income (loss)	$ 15,659,000	$ (25,881,000)	$ 15,386,000	$ (42,868,000)