Amount of average amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second and third fiscal years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Acquisitions and Divestitures (Details) (USD $)	3 Months Ended	12 Months Ended		0 Months Ended
Acquisitions and Divestitures (Details) (USD $)	Dec. 31, 2013	Dec. 30, 2014	Dec. 31, 2013	Nov. 26, 2014	Dec. 31, 2013 restaurant	Dec. 25, 2012	Apr. 01, 2014	Nov. 25, 2014
Acquisitions and Divestitures
Issuance of shares for franchise acquisition		$ 1,284,000
Gain on sale of Aspen Creek concept and restaurants	1,800,000		1,800,000
Purchase price allocated
Goodwill	117,197,000us-gaap_Goodwill	116,571,000us-gaap_Goodwill	117,197,000us-gaap_Goodwill		117,197,000us-gaap_Goodwill	113,435,000us-gaap_Goodwill
Amortization expense relating to the intangible asset		1,673,000us-gaap_AmortizationOfIntangibleAssets	1,644,000us-gaap_AmortizationOfIntangibleAssets
Measurement Period Adjustments
Purchase price allocated
Property and equipment, net							19,000
Goodwill							730,000
Intangible asset							(749,000)
Franchise restaurant jointly owned
Acquisitions and Divestitures
Ownership percentage by entity								5.00%
Issuance of shares for franchise acquisition (in shares)				40,699
Issuance of shares for franchise acquisition				1,300,000
Consideration paid				1,300,000
Book value of noncontrolling interest				700,000
Cash received on sale				200,000
Debt repayment				1,300,000
Franchise restaurants in Ohio
Acquisitions and Divestitures
Cash received on sale					1,500,000
Number of franchise restaurants acquired					2
Aggregate transaction value	6,000,000		6,000,000		6,000,000
Purchase price allocated
Current assets		64,000
Property and equipment, net		577,000
Goodwill		3,743,000
Intangible asset		405,000
Current liabilities		(139,000)
Other liabilities		(150,000)
Purchase Price		4,500,000
Intangible assets weighted-average life		2 years 8 months 12 days
Amortization expense relating to the intangible asset		100,000
Franchise restaurants in Ohio \| Amounts Previously Recorded
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		4,500,000		4,500,000
Franchise restaurants in Ohio \| Forecast
Purchase price allocated
Expected average annual expense		100,000
Aspen Creek concept
Acquisitions and Divestitures
Number of restaurants sold					2
Gain on sale of Aspen Creek concept and restaurants					$ 1,800,000