Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
Cash flows from operating activities:
Net income	$ 17,766	$ 15,998	$ 16,597
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,865	16,776	13,598
Loss on disposal of restaurant property	429	27	108
Loan cost amortization	2	8	18
Equity based compensation	2,666	2,900	2,567
Impairment charges	598	3,248	3,536
Deferred income taxes	1,575	3,495	653
Amortization of deferred lease incentives	(1,140)	(666)	(852)
Changes in operating assets and liabilities:
Restricted cash		215
Inventory	908	(716)	(2,498)
Lease incentives receivable	2,692	5,760	3,767
Prepaid expenses and other assets	(1,497)	(2,282)	(2,154)
Accounts payable	(2,666)	2,801	3,209
Income taxes	1,888	(4,287)	(3,050)
Deferred rent obligations	2,307	(1,094)	1,970
Deferred revenue	1,100	1,919	2,733
Other liabilities	4,322	1,766	2,564
Net cash provided by operating activities	49,815	45,868	42,766
Cash flows from investing activities:
Proceeds from sale of property and equipment	3,078	1	13
Purchase of trade name	(546)
Purchases of property and equipment	(36,698)	(46,150)	(47,491)
Other investing activities	(2)	(381)	(478)
Net cash used in investing activities	(34,168)	(46,530)	(47,956)
Cash flows from financing activities:
Net (payments on) proceeds from revolving credit facility	(4,500)	4,500
Purchases of treasury stock	(4,823)	(3,000)	(6,319)
Cash settlement for share-based awards	(85)
Proceeds from exercise of stock options	3,207	818	1,355
Net cash (used in) provided by financing activities	(6,201)	2,318	(4,964)
Net change in cash and cash equivalents	9,446	1,656	(10,154)
Cash and cash equivalents at beginning of period	5,176	3,520	13,674
Cash and cash equivalents at end of period	14,622	5,176	3,520
Supplemental disclosures of cash flow information:
Interest	87	175	129
Income taxes	3,756	6,626	10,225
Non cash operating and investing activities:
Capital expenditures included in accounts payable at end of period	968	$ 1,998	$ 511
Acquisition of trade name financed by current liabilities	$ 100