Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 24, 2014
Cash flows from operating activities:
Net income	$ 18,688,000	$ 37,888,000
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	9,624,000	8,271,000
Stock-based compensation expense	608,000	635,000
Interest accretion		250,000
Income tax receivable agreement expense	1,022,000	40,119,000
Gain on sale of restaurants		(2,658,000)
Loss on disposal of assets	427,000	568,000
Early extinguishment of debt		5,082,000
Impairment of property and equipment	136,000	62,000
Closed-store reserve	(112,000)	353,000
Amortization of deferred financing costs	229,000	1,173,000
Amortization of favorable and unfavorable leases, net	(128,000)	(168,000)
Excess income tax benefit related to share-based compensation plans	(5,700,000)
Deferred income taxes, net	10,581,000	(60,536,000)
Changes in operating assets and liabilities:
Accounts and other receivables, net	(292,000)	186,000
Inventories	148,000	29,000
Prepaid expenses and other current assets	1,278,000	(1,215,000)
Income taxes receivable/payable	5,670,000	(27,000)
Other assets	102,000	491,000
Accounts payable	500,000	(457,000)
Accrued salaries and vacation	(113,000)	(1,202,000)
Accrued insurance	1,032,000	349,000
Other accrued expenses and liabilities	(279,000)	649,000
Net cash flows provided by operating activities	43,421,000	29,842,000
Cash flows from investing activities:
Proceeds from sale of restaurants		5,435,000
Purchase of property and equipment	(16,512,000)	(19,414,000)
Net cash flows used in investing activities	(16,512,000)	(13,979,000)
Cash flows from financing activities:
Payments on senior secured loan		(101,425,000)
Proceeds from issuance of common stock, net of expenses		112,300,000
Payments of call premium on notes		(1,512,000)
Proceeds from exercise of stock options	4,254,000
Payments on revolver loan	(40,000,000)
Payments on obligations under capital leases	(155,000)	(201,000)
Amendment fee		(215,000)
Excess income tax benefit related to share-based compensation plans	5,700,000
Net cash flows (used in) provided by financing activities	(30,201,000)	8,947,000
(Decrease) Increase in cash and cash equivalents	(3,292,000)	24,810,000
Cash and cash equivalents, beginning of period	11,499,000	17,015,000
Cash and cash equivalents, end of period	8,207,000	41,825,000
Supplemental cash flow information
Cash paid during the period for interest	2,781,000	15,705,000
Cash paid during the period for income taxes, net	30,000	161,000
Unpaid purchases of property and equipment	4,567,000	2,857,000
Cashless stock option exercise	$ (34,000)	$ (37,000)