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Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 07, 2024 USD ($) | Sep. 29, 2024 USD ($) restaurant segment reporting_unit | Oct. 01, 2023 USD ($) | Oct. 02, 2022 USD ($) restaurant
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | $ 29,422 | $ 28,254 |
Capitalized software implementation costs |  | 11,100 | 7,900 |
Amortization expense for software implementation costs |  | 4,500 | 5,000 | $ 5,100
Depreciation |  | $ 59,200 | 61,700 | 55,800
Number of operating segments | segment |  | 2 |  |
Goodwill impairment |  | $ 162,624 | 0 | 0
Number of reporting units | reporting_unit |  | 2 |  |
Deferred gift card income |  | $ 0 | 19,397 |
Amounts recognized on unredeemed gift card balances |  | 800 | 1,600 | $ 700
General liability and workers' comp estimated claims to be paid by insurance providers |  | $ 27,900 | $ 31,300 |
Contractual contributions |  | 5.00% | 5.00% | 5.00%
Marketing and advertising expense |  | $ 35,000 | $ 38,900 | $ 32,600
Del Taco |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill impairment | $ (162,600) | 162,624 |  |
Accrued advertising costs |  | $ (800) | 800 |
Del Taco | Entity Operated Units |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of restaurants | restaurant |  | 133 |  |
Del Taco | Franchised Units |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of restaurants | restaurant |  | 461 |  |
Jack in the Box |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of restaurants | restaurant |  |  |  | 9
Goodwill impairment |  | $ 0 |  |
Accrued advertising costs |  | $ 800 | $ 9,500 |
Jack in the Box | Entity Operated Units |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of restaurants | restaurant |  | 150 |  |
Jack in the Box | Franchised Units |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of restaurants | restaurant |  | 2,041 |  |
Sales Concentration Risk | Revenue Benchmark | Del Taco |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Concentration risk, percentage |  | 4.00% | 4.00% | 4.00%
Other Assets |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Cash surrender value of life insurance |  | $ 129,700 | $ 113,200 |
Accrued Liabilities |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Deferred gift card income |  | $ 2,700 | $ 2,900 |
Minimum |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment assigned lives |  | 1 year |  |
Maximum |  |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment assigned lives |  | 35 years |  |

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