Consolidated Statements Of Comprehensive Income - USD ($)	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Revenues:
Revenue	$ 389,993,000	$ 351,518,000
Costs and expenses:
Cost of sales	113,790,000	102,927,000
Restaurant wages and related expenses	129,646,000	124,575,000
Restaurant rent expense	30,314,000	29,454,000
Other restaurant operating expenses	61,419,000	57,978,000
Advertising expense	15,369,000	13,876,000
General and administrative expenses (including stock-based compensation of $1,469 and $1,132, respectively)	21,369,000	20,787,000
Depreciation and amortization	20,609,000	21,031,000
Impairment and other lease charges	353,000	2,881,000
Total operating expenses	393,096,000	373,565,000
Loss from operations	(3,103,000)	(22,047,000)
Interest expense	6,726,000	7,140,000
Loss before income taxes	(9,829,000)	(29,187,000)
Provision (benefit) for income taxes	(2,661,000)	(6,978,000)
Net loss	$ (7,168,000)	$ (22,209,000)
Basic and diluted net income (loss) per share	$ (0.14)	$ (0.44)
Weighted average common shares outstanding:
Weighted average common shares outstanding (in shares)	49,824,140	50,821,101
Shares used in computing diluted net income (loss) per share (in shares)	49,824,140	50,821,101
Other comprehensive income (loss), net of tax:
Net loss	$ (7,168,000)	$ (22,209,000)
Change in valuation of interest rate swap (Note 6)	3,159,000	(5,209,000)
Comprehensive loss	$ (4,009,000)	$ (27,418,000)