Consolidated Statements Of Operations And Comprehensive Loss (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Restaurant sales	$ 692,755	$ 663,483	$ 539,608
Costs and expenses:
Cost of sales	209,664	201,532	172,698
Restaurant wages and related expenses	219,718	208,404	169,857
Restaurant rent expense	48,865	47,198	37,883
Other restaurant operating expenses	113,586	106,508	88,883
Advertising expense	27,961	29,615	22,257
General and administrative	40,001	37,228	36,085
Depreciation and amortization	36,923	33,594	26,321
Impairment and other lease charges	3,541	4,462	977
Other expense (income)	47	17	(717)
Total operating expenses	700,306	668,558	554,244
Income from operations	(7,551)	(5,075)	(14,636)
Interest Expense	18,801	18,841	12,764
Loss on extinguishment of debt	0	0	1,509
Income (loss) from continuing operations before income taxes	(26,352)	(23,916)	(28,909)
Provision (benefit) for income taxes	11,765	(10,397)	(10,093)
Income (loss) from continuing operations	(38,117)	(13,519)	(18,816)
Income (loss) from discontinued operations, net of income taxes	0	0	(72)
Net income (loss)	(38,117)	(13,519)	(18,888)
Basic and diluted net income (loss) per share:
Continuing Operations	$ (1.23)	$ (0.59)	$ (0.83)
Discontinued Operations	$ 0.00	$ 0.00	$ 0.00
Basic and diluted weighted average common shares outstanding	30,885,275	22,958,963	22,580,468
Other comprehensive income (loss), net of tax:
Net income (loss)	(38,117)	(13,519)	(18,888)
Change in valuation of interest rate swap, net of tax	0	0	68
Change in postretirement benefit obligations, net of tax	(1,059)	33	(484)
Comprehensive income (loss)	$ (39,176)	$ (13,486)	$ (19,304)