Condensed Consolidated Statements of Income - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Revenues:
Restaurant sales	$ 85,765	$ 77,989	$ 177,836	$ 163,059
Franchise income	4,117	3,807	8,139	7,843
Other operating income	1,167	1,210	2,419	2,458
Total revenues	91,049	83,006	188,394	173,360
Costs and expenses:
Food and beverage costs	26,162	24,828	54,262	51,496
Restaurant operating expenses	40,264	37,741	81,966	76,584
Marketing and advertising	2,448	1,923	4,040	3,669
General and administrative costs	7,445	5,847	13,892	12,072
Depreciation and amortization expenses	3,187	2,714	6,106	5,224
Pre-opening costs	139	119	515	528
Total costs and expenses	79,645	73,172	160,781	149,573
Operating income	11,404	9,834	27,613	23,787
Other income (expense):
Interest expense, net	(174)	(298)	(400)	(585)
Other	16	12	31	21
Income from continuing operations before income tax expense	11,246	9,548	27,244	23,223
Income tax expense	3,577	2,880	8,807	7,566
Income from continuing operations	7,669	6,668	18,437	15,657
Income (loss) from discontinued operations, net of income taxes	(153)	236	(509)	111
Net income	$ 7,516	$ 6,904	$ 17,928	$ 15,768
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ 0.22	$ 0.19	$ 0.53	$ 0.45
Discontinued operations (in dollars per share)	0	0.01	(0.01)	0
Basic earnings per share (in dollars per share)	0.22	0.20	0.52	0.45
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	0.22	0.18	0.53	0.44
Discontinued operations (in dollars per share)	0	0.01	(0.01)	0
Diluted earnings per share (in dollars per share)	$ 0.22	$ 0.19	$ 0.52	$ 0.44
Shares used in computing net income per common share:
Basic (in shares)	34,343,691	35,122,131	34,280,024	35,108,391
Diluted (in shares)	34,611,107	35,587,975	34,640,397	35,703,436
Cash dividends declared per common share (in dollars per share)	$ 0.06	$ 0.05	$ 0.12	$ 0.10