Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 25, 2014	Jun. 26, 2013	Jun. 25, 2014	Jun. 26, 2013
Revenue:
Company restaurant sales	$ 81,138	$ 82,841	$ 160,442	$ 163,871
Franchise and license revenue	33,476	33,730	66,092	67,190
Total operating revenue	114,614	116,571	226,534	231,061
Costs of company restaurant sales:
Product costs	21,327	21,402	41,910	42,548
Payroll and benefits	31,978	33,220	65,077	64,766
Occupancy	4,899	5,513	10,027	10,741
Other operating expenses	11,443	11,316	22,808	22,516
Total costs of company restaurant sales	69,647	71,451	139,822	140,571
Costs of franchise and license revenue	10,633	11,585	21,330	22,987
General and administrative expenses	14,068	14,085	28,184	29,244
Depreciation and amortization	5,281	5,352	10,519	10,576
Operating (gains), losses and other charges, net	40	1,484	462	1,618
Total operating costs and expenses, net	99,669	103,957	200,317	204,996
Operating income	14,945	12,614	26,217	26,065
Interest expense, net	2,274	2,548	4,596	5,348
Other nonoperating (income) expense, net	(332)	1,331	(432)	1,332
Net income before income taxes	13,003	8,735	22,053	19,385
Provision for income taxes	4,730	2,537	7,349	6,106
Net income	$ 8,273	$ 6,198	$ 14,704	$ 13,279
Basic net income per share	$ 0.10	$ 0.07	$ 0.17	$ 0.14
Diluted net income per share	$ 0.09	$ 0.07	$ 0.16	$ 0.14
Basic weighted average shares outstanding	86,781	91,659	87,792	92,004
Diluted weighted average shares outstanding	88,384	93,665	89,630	94,081