Divestitures and Acquisitions (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013 restaurant	Dec. 31, 2013	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Divestitures and acquisitions
Number of restaurants sold	2
Purchase price of restaurants sold	$ 6,000,000
Gain on sale of Aspen Creek concept and restaurants	1,800,000	1,800,000	1,800,000
Purchase price allocated
Goodwill	116,468,000	116,468,000	116,468,000	113,435,000	110,946,000
Amortization expense relating to the intangible asset			1,624,000	1,076,000
Aspen Creek concept
Divestitures and acquisitions
Number of restaurants sold	2	2	2
Purchase price of restaurants sold		6,000,000	6,000,000
Gain on sale of Aspen Creek concept and restaurants		1,800,000	1,800,000
Franchise restaurants in Ohio
Divestitures and acquisitions
Number of franchise restaurants acquired	2
Cash received on sale	1,500,000
Purchase price allocated
Current assets	64,000	64,000	64,000
Property and equipment, net	558,000	558,000	558,000
Goodwill	3,013,000	3,013,000	3,013,000
Intangible asset	1,154,000	1,154,000	1,154,000
Current liabilities	(139,000)	(139,000)	(139,000)
Other liabilities	(150,000)	(150,000)	(150,000)
Purchase Price	4,500,000
Intangible assets weighted-average life			3 years 8 months 12 days
Expected average annual expense for the next four years			300,000
Franchise restaurants in Illinois
Divestitures and acquisitions
Number of franchise restaurants acquired				2
Purchase price allocated
Current assets				64,000
Property and equipment, net				304,000
Goodwill				2,759,000
Intangible asset				1,342,000
Current liabilities				(195,000)
Other liabilities				(64,000)
Purchase Price				4,210,000
Intangible assets weighted-average life				2 years 7 months 6 days
Amortization expense relating to the intangible asset			600,000
Expected annual amortization expense for 2014	500,000	500,000	500,000
Expected annual amortization expense for 2015	200,000	200,000	200,000
Expected annual amortization expense for 2016	$ 100,000	$ 100,000	$ 100,000