Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 17,921	$ 18,688
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	11,796	9,624
Stock-based compensation expense	244	608
Fire insurance proceeds for expenses paid and lost profit	257
Income tax receivable agreement expense	411	1,022
Gain on sale of restaurant	(28)
Loss on disposal of assets	524	427
Gain on recovery of insurance proceeds for property, equipment and expenses	(741)
Gain on recovery of insurance proceeds for lost profits	(502)
Impairment of property and equipment	2,508	136
Closed-store reserve	116	(112)
Amortization of deferred financing costs	229	229
Amortization of favorable and unfavorable leases, net	(51)	(128)
Excess income tax benefit related to share-based compensation plans	(169)	(5,700)
Deferred income taxes, net	11,624	10,581
Changes in operating assets and liabilities:
Accounts and other receivables, net	(2,066)	(292)
Inventories	57	148
Prepaid expenses and other current assets	(770)	1,278
Income taxes payable	134	5,670
Other assets	94	102
Accounts payable	(6,269)	500
Accrued salaries and vacation	2,538	(113)
Accrued insurance	140	1,032
Other accrued expenses and liabilities	1,673	(279)
Net cash flows provided by operating activities	39,670	43,421
Cash flows from investing activities:
Proceeds from sale of restaurant	1,465
Fire insurance proceeds for property and equipment	743
Purchase of property and equipment	(26,465)	(16,512)
Net cash flows used in investing activities	(24,257)	(16,512)
Cash flows from financing activities:
Payments on revolver loan	(16,000)	(40,000)
Proceeds from issuance of common stock, net of expenses	978	4,254
Payment of obligations under capital leases	(132)	(155)
Excess income tax benefit related to share-based compensation plans	169	5,700
Net cash flows used in financing activities	(14,985)	(30,201)
Increase (Decrease) in cash and cash equivalents	428	(3,292)
Cash and cash equivalents, beginning of period	6,101	11,499
Cash and cash equivalents, end of period	6,529	8,207
Supplemental cash flow information
Cash paid during the period for interest	2,355	2,781
Cash paid during the period for income taxes	173	30
Unpaid purchases of property and equipment	$ 4,599	4,567
Cashless stock option exercise		$ (34)