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Segment Reporting (Summarized Financial Information Of Reportable Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 03, 2016 | Jul. 05, 2015 | Jul. 03, 2016 | Jul. 05, 2015 | Sep. 27, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated revenues | $ 368,938 | $ 359,506 | $ 1,200,912 | $ 1,186,249 |
Consolidated earnings from operations | 55,705 | 50,395 | 171,005 | 155,499 |
Gains (losses) on the sale of company-operated restaurants | 409 | (183) | 1,224 | (4,353) |
Interest expense, net | 7,613 | 4,504 | 22,699 | 13,937 |
Consolidated earnings from continuing operations and before income taxes | 48,092 | 45,891 | 148,306 | 141,562 |
Consolidated depreciation expense | 20,814 | 20,174 | 69,748 | 67,675 |
Consolidated goodwill | 149,007 |  | 149,007 |  | $ 149,027
Total goodwill disposals |  |  | 20 |  |
Qdoba brand restaurant operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated depreciation expense | 4,536 | 3,864 | 14,403 | 13,179 |
Consolidated goodwill | 100,597 |  | 100,597 |  | 100,597
Total goodwill disposals |  |  | 0 |  |
Jack in the box brand restaurant operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gains (losses) on the sale of company-operated restaurants | 409 | (183) | 1,224 | (4,353) |
Consolidated depreciation expense | 14,877 | 14,737 | 50,409 | 49,051 |
Consolidated goodwill | 48,410 |  | 48,410 |  | $ 48,430
Total goodwill disposals |  |  | 20 |  |
Shared services and unallocated costs [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated depreciation expense | 1,401 | 1,573 | 4,936 | 5,445 |
Segment Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gains (losses) on the sale of company-operated restaurants | 409 | (183) | 1,224 | (4,353) |
Corporate, Non-Segment [Member] | Shared services and unallocated costs [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated earnings from operations | (28,404) | (25,582) | (82,115) | (84,936) |
Operating Segments [Member] | Qdoba brand restaurant operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated revenues | 104,445 | 96,167 | 324,774 | 301,515 |
Consolidated earnings from operations | 14,172 | 13,805 | 33,532 | 37,265 |
Operating Segments [Member] | Jack in the box brand restaurant operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Consolidated revenues | 264,493 | 263,339 | 876,138 | 884,734 |
Consolidated earnings from operations | $ 69,528 | $ 62,355 | $ 218,364 | $ 207,523 |

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