Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended			12 Months Ended
	Dec. 30, 2014	Dec. 31, 2013 restaurant	Dec. 25, 2012 restaurant	Dec. 30, 2014	Dec. 31, 2013 restaurant	Dec. 25, 2012 restaurant
Property and Equipment
Repairs and maintenance expense				$ 17,900,000	$ 15,900,000	$ 13,800,000
Impairment of Goodwill
Number of restaurants impaired		2	1			1
Impairment of goodwill	600,000			626,000	0	300,000
Impairment or Disposal of Long-Lived Assets
Maximum threshold amount considered for impairment				300,000
Impairment analysis, estimated useful life of operating a restaurant				20 years
Impairment of restaurant				$ 0	$ 200,000
Number of long-lived assets impaired					1
Land improvements | Minimum
Property and Equipment
Estimated useful life				10 years
Land improvements | Maximum
Property and Equipment
Estimated useful life				25 years
Buildings and leasehold improvements | Minimum
Property and Equipment
Estimated useful life				3 years
Buildings and leasehold improvements | Maximum
Property and Equipment
Estimated useful life				10 years
Equipment and smallwares | Minimum
Property and Equipment
Estimated useful life				3 years
Equipment and smallwares | Maximum
Property and Equipment
Estimated useful life				10 years