Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2017	Mar. 30, 2016
Revenue
Company-operated restaurant revenue	$ 93,449	$ 88,369
Franchise revenue	6,322	5,985
Total revenue	99,771	94,354
Cost of operations
Food and paper cost	27,072	26,768
Labor and related expenses	26,833	24,507
Occupancy and other operating expenses	20,542	18,834
Company restaurant expenses	74,447	70,109
General and administrative expenses	9,733	9,237
Franchise expenses	817	924
Depreciation and amortization	4,317	3,758
Loss on disposal of assets	225	199
Expenses related to fire loss	0	48
Gain on recovery of insurance proceeds, property, equipment and expenses	0	(289)
Asset impairment and closed-store reserves	871	74
Total expenses	90,410	84,060
Income from operations	9,361	10,294
Interest expense-net of interest income of $5 and $7 for the quarters ended March 29, 2017 and March 30, 2016, respectively	790	826
Income tax receivable agreement expense	227	264
Income before provision for income taxes	8,344	9,204
Provision for income taxes	3,467	3,761
Net income	$ 4,877	$ 5,443
Net income per share
Basic (usd per share)	$ 0.13	$ 0.14
Diluted (usd per share)	$ 0.12	$ 0.14
Weighted-average shares used in computing net income per share
Basic (shares)	38,437,020	38,284,435
Diluted (shares)	39,079,007	39,001,078