Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Restaurant sales	$ 1,179,307	$ 1,088,532	$ 943,583
Costs and expenses:
Cost of sales	326,308	304,593	250,112
Restaurant wages and related expenses	382,829	350,054	297,766
Restaurant rent expense	81,409	75,948	64,814
Other restaurant operating expenses	178,750	166,786	148,946
Advertising expense	48,340	44,677	41,299
General and administrative	66,587	60,348	54,956
Depreciation and amortization	58,468	54,159	47,295
Impairment and other lease charges	3,685	2,827	2,355
Other expense (income)	(424)	(333)	338
Total operating expenses	1,145,952	1,059,059	907,881
Income (loss) from operations	33,355	29,473	35,702
Interest Expense	23,638	21,710	18,315
Gain on bargain purchase (Note 2)	(230)	0	0
Income (loss) before income taxes	9,947	7,763	17,387
Provision (benefit) for income taxes	(157)	604	(28,085)
Net income (loss)	$ 10,104	$ 7,159	$ 45,472
Earnings Per Share, Basic	$ 0.22	$ 0.16	$ 1.01
Basic weighted average common shares outstanding	35,715,372	35,416,531	35,178,329
Diluted weighted average common shares outstanding	45,319,971	44,976,514	44,851,345
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 10,104	$ 7,159	$ 45,472
Change in postretirement benefit obligations, net of tax	564	(7)	(868)
Comprehensive income (loss)	$ 10,668	$ 7,152	$ 44,604