Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Restaurant sales	$ 943,583	$ 859,004	$ 692,755
Costs and expenses:
Cost of sales	250,112	240,322	209,664
Restaurant wages and related expenses	297,766	267,950	219,718
Restaurant rent expense	64,814	58,096	48,865
Other restaurant operating expenses	148,946	135,874	113,586
Advertising expense	41,299	32,242	27,961
General and administrative	54,956	50,515	40,001
Depreciation and amortization	47,295	39,845	36,923
Impairment and other lease charges	2,355	3,078	3,541
Other expense (income)	338	(126)	47
Total operating expenses	907,881	827,796	700,306
Income (loss) from operations	35,702	31,208	(7,551)
Interest Expense	18,315	18,569	18,801
Loss on extinguishment of debt	0	12,635	0
Income (loss) before income taxes	17,387	4	(26,352)
Provision (benefit) for income taxes	(28,085)	0	11,765
Net income (loss)	$ 45,472	$ 4	$ (38,117)
Basic and diluted net income (loss) per share	$ 1.01	$ 0.00	$ (1.23)
Basic weighted average common shares outstanding	35,178,329	34,958,847	30,885,275
Diluted weighted average common shares outstanding	44,851,345	44,623,251	30,885,275
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 45,472	$ 4	$ (38,117)
Change in postretirement benefit obligations, net of tax	(868)	22	(1,059)
Comprehensive income (loss)	$ 44,604	$ 26	$ (39,176)