Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2017	Jun. 29, 2016
Operating Cash Flows, Direct Method [Abstract]
Impairment of Long-Lived Assets Held-for-use	$ 445	$ 56
Asset impairment and closed-store reserves	1,255	134
Cash flows from operating activities:
Net income	12,696	12,710
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	8,949	7,722
Stock-based compensation expense	414	139
Fire insurance proceeds for expenses paid and lost profit	0	8
Income tax receivable agreement (income) expense	126	229
Gain (Loss) on Disposition of Business	0	33
Loss on disposal of assets	659	466
Gain on recovery of insurance proceeds property, equipment and expenses	0	(889)
Closed-store reserve	810	78
Amortization of deferred financing costs	152	152
Amortization of favorable and unfavorable leases, net	(57)	(20)
Excess income tax benefit related to share-based compensation plans	0	(253)
Deferred income taxes, net	7,562	8,716
Changes in operating assets and liabilities:
Accounts and other receivables, net	(1,398)	(607)
Inventories	(18)	140
Prepaid expenses and other current assets	(624)	(2,701)
Income taxes payable	14	214
Other assets	37	19
Accounts payable	(1,187)	(5,889)
Accrued salaries and vacation	2,110	355
Accrued insurance	271	(48)
Other accrued expenses and liabilities	(353)	454
Restricted cash	125	0
Net cash flows provided by operating activities	30,733	21,018
Cash flows from investing activities:
Proceeds from Divestiture of Businesses	0	1,465
Fire insurance proceeds for property and equipment	0	992
Purchase of property and equipment	(19,040)	(14,311)
Net cash flows used in investing activities	(19,040)	(11,854)
Cash flows from financing activities:
Payments on revolver loan	(9,500)	(6,500)
Proceeds from Issuance of Common Stock	93	566
Payment of obligations under capital leases	(83)	(88)
Excess income tax benefit related to share-based compensation plans	0	253
Net cash flows used in financing activities	(9,490)	(5,769)
Increase in cash and cash equivalents	2,203	3,395
Cash and cash equivalents, beginning of period	2,168	6,101
Cash and cash equivalents, end of period	4,371	9,496
Supplemental cash flow information
Cash paid during the period for interest	1,650	1,567
Cash paid during the period for income taxes	135	170
Unpaid purchases of property and equipment	$ 4,321	$ 3,881