Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs (Narrative) (Details) $ in Thousands	12 Months Ended
	Oct. 02, 2016 USD ($)	Sep. 27, 2015 USD ($) litigation	Sep. 28, 2014 USD ($)
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Accelerated depreciation	$ 2,214	$ 6,260	$ 1,202
Gain (Loss) on Disposition of Property Plant Equipment	$ (2,654)	$ (1,847)	$ (1,680)
Jack in the box brand restaurant operations [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Number of Closed Restaurants Related to Eminent Domain Proceeds in Current Period | litigation		1
Gains from imminent domain [Member] | Jack in the box brand restaurant operations [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment		$ 900
Accelerated Depreciation Related to Beverage Equipment Upgrades [Member]
Impairment, Disposition of Property and Equipment, and Restaurant Closing Costs [Line Items]
Accelerated depreciation		$ 3,600