Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 24, 2014	Sep. 25, 2013
Cash flows from operating activities:
Net income	$ 37,888	$ 1,268
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,271	7,570
Stock-based compensation expense	635	191
Interest accretion	250	4,854
Income tax receivable agreement expense	40,119
Gain on sale of restaurants	(2,658)
Loss on disposal of assets	568	686
Early extinguishment of debt	5,082
Impairment of property and equipment	62	45
Close-store reserve	353	81
Amortization of deferred financing costs	1,173	1,538
Amortization of favorable and unfavorable leases, net	(168)	(159)
Deferred income taxes, net	(60,536)	1,979
Changes in operating assets and liabilities:
Accounts and other receivables, net	186	(1,979)
Inventories	29	50
Prepaid expenses and other current assets	(1,215)	(1,219)
Income taxes payable	(27)	(3)
Other assets	491	91
Accounts payable	(457)	2,150
Accrued salaries and vacation	(1,202)	(1,459)
Accrued insurance	349	343
Other accrued expenses and liabilities	649	(3,499)
Net cash flows provided by operating activities	29,842	12,528
Cash flows from investing activities:
Proceeds from sale of restaurants	5,435	15
Purchase of property and equipment	(19,414)	(10,169)
Net cash flows used in investing activities	(13,979)	(10,154)
Cash flows from financing activities:
Payments on senior secured loan	(101,425)	(1,275)
Proceeds from issuance of common stock, net of expenses	112,300
Payment of call premium on notes	(1,512)
Payment of obligations under capital leases	(201)	(168)
Amendment fee	(215)
Net cash flows provided by (used in) financing activities	8,947	(1,443)
Increase in cash and cash equivalents	24,810	931
Cash and cash equivalents, beginning of period	17,015	21,487
Cash and cash equivalents, end of period	41,825	22,418
Supplemental cash flow information
Cash paid during the period for interest	15,705	26,380
Cash paid during the period for income taxes, net	161	29
Unpaid purchases of property and equipment	2,857	562
Cashless stock option exercise	$ (27)