Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Cash flows provided from (used for) operating activities:
Net income (loss)	$ (31,919)	$ 10,104	$ 7,159
Adjustments to reconcile net income to net cash provided from operating activities:
Loss (gain) on disposals of property and equipment	(74)	312	521
Stock-based compensation	5,753	5,812	3,518
Gain on bargain purchase	0	(230)	0
Impairment and other lease charges	3,564	3,685	2,827
Depreciation and amortization	74,674	58,468	54,159
Amortization of deferred financing costs	1,694	1,202	1,035
Amortization of bond premium and discount on debt	(80)	(913)	(459)
Amortization of deferred gains from sale-leaseback transactions	0	(1,584)	(1,626)
Deferred income taxes	(11,982)	(483)	574
Loss on extinguishment of debt - non-cash	129	0	0
Refundable income taxes	(284)	55	99
Trade and other receivables	(523)	(2,275)	(1,310)
Accounts payable	1,196	(926)	3,084
Accrued interest	(2,917)	146	996
Accrued payroll, related taxes and benefits	(538)	2,084	336
Change in operating right-of-use assets and operating lease liabilities, net	3,980	0	0
Other	6,035	5,312	1,870
Net cash provided from operating activities	48,708	80,769	72,783
Cash flows used for investing activities:
New restaurant development	(53,596)	(23,171)	(14,759)
Restaurant remodeling	(61,105)	(31,951)	(33,504)
Other restaurant capital expenditures	(18,922)	(15,726)	(18,926)
Corporate and restaurant information systems	(11,978)	(4,887)	(6,327)
Total capital expenditures	(145,601)	(75,735)	(73,516)
Acquisition of restaurants, net of cash acquired	(130,646)	(38,102)	(37,923)
Proceeds from insurance recoveries	323	642	481
Proceeds from lease incentives	10,722	0	0
Properties purchased for sale-leaseback	(1,207)	(2,123)	(1,404)
Proceeds from sale-leaseback transactions	48,364	8,424	4,257
Net cash used for investing activities	(218,045)	(106,894)	(108,105)
Cash flows provided from (used for) financing activities:
Proceeds from issuance of senior secured second lien notes	422,875	0	0
Repayments of Term Loan B Facility	(2,125)	0	0
Retirement of 8% Senior Secured Second Lien Notes	(280,500)	0	0
Proceeds from issuance of 8% senior secured second lien notes	0	0	79,875
Borrowings under prior revolving credit facility	0	17,000	183,250
Repayments under prior revolving credit facility	0	(17,000)	(196,750)
Borrowings under new revolving credit facility	436,000	0	0
Repayments under new revolving credit facility	(390,250)	0	0
Payments on finance lease liabilities	(2,170)	(1,811)	(1,651)
Proceeds from lease financing obligations	0	2,692	0
Costs associated with financing long-term debt	(11,516)	(154)	(1,992)
Purchase of treasury shares	(4,017)	0	0
Net cash provided from (used for) financing activities	168,297	727	62,732
Net increase (decrease) in cash	(1,040)	(25,398)	27,410
Cash and cash equivalents, beginning of period	4,014	29,412	2,002
Cash and cash equivalents, end of period	2,974	4,014	29,412
Supplemental disclosures:
Interest paid on long-term debt	29,055	23,098	20,885
Interest paid on lease financing obligations	104	105	119
Accruals for capital expenditures	15,062	7,605	6,839
Common stock issued for consideration in acquisition	145,333	0	0
Non-cash reduction of capital lease assets and obligation	0	2,538	1,744
Income taxes paid (refunded), net	144	(270)	(63)
Finance lease obligations acquired or incurred	$ 754	$ 49	$ 316