Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs (Narrative) (Details) $ in Thousands	12 Months Ended
	Sep. 27, 2015 USD ($) litigation	Sep. 28, 2014 USD ($)	Sep. 29, 2013 USD ($) litigation
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Accelerated depreciation	$ 6,260	$ 1,202	$ 2,554
Gain (Loss) on Disposition of Property Plant Equipment	$ (1,847)	$ (1,680)	$ (789)
Number of Closed Restaurants Related to Eminent Domain Proceeds in Current Period | litigation	1		4
Accelerated Depreciation Related to Beverage Equipment Upgrades [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Accelerated depreciation	$ 3,600
Gains from imminent domain [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment	900		$ 2,800
Accelerated Depreciation Related to Lighting Upgrades [Member] [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Accelerated depreciation	$ 1,500