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Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs (Narrative) (Details) $ in Thousands | 12 Months Ended
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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 |

X
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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