XML 93 R72.htm IDEA: XBRL DOCUMENT
v3.20.2

Leases - Sale, Leaseback Transactions (Details) $ in Thousands | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 05, 2020 USD ($) | Jan. 19, 2020 USD ($) | Sep. 27, 2020 USD ($) sale_leasebackTransaction | Sep. 29, 2019 USD ($) | Sep. 30, 2018 USD ($)
Sale Leaseback Transaction [Line Items] |  |  |  |  |
Number of sales - leaseback transactions completed | sale_leasebackTransaction |  |  | 2 |  |
Proceeds from the sale and leaseback of assets |  |  | $ 19,828 | $ 4,447 | $ 9,336
Notice period for termination of lease without penalty |  |  | 90 days |  |
Multi-tenant Commercial Property |  |  |  |  |
Sale Leaseback Transaction [Line Items] |  |  |  |  |
Proceeds from the sale and leaseback of assets |  | $ 17,400 |  |  |
Gain (loss) on sale and leaseback transaction |  | $ (200) |  |  |
Initial term of operating lease |  | 20 years |  |  |
Restaurant |  |  |  |  |
Sale Leaseback Transaction [Line Items] |  |  |  |  |
Proceeds from the sale and leaseback of assets | $ 2,400 |  |  |  |
Gain (loss) on sale and leaseback transaction | $ (100) |  |  |  |
Initial term of operating lease | 17 years |  |  |  |
Principal Executive Offices |  |  |  |  |
Sale Leaseback Transaction [Line Items] |  |  |  |  |
Proceeds from the sale and leaseback of assets |  |  | $ 20,600 |  |
Gain (loss) on sale and leaseback transaction |  |  | $ 10,800 |  |
Initial term of operating lease |  |  | 18 months |  |

X
- Definition Notice Period for Termination of Lease without Penalty + References No definition available. + Details
Name: | jack_NoticePeriodForTerminationOfLeaseWithoutPenalty
Namespace Prefix: | jack_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Sale, Leaseback Transactions During Period + References No definition available. + Details
Name: | jack_NumberOfSaleLeasebackTransactionsDuringPeriod
Namespace Prefix: | jack_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Assets Held For Sale and Leaseback + References No definition available. + Details
Name: | jack_ProceedsFromAssetsHeldForSaleAndLeaseback
Namespace Prefix: | jack_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888430&loc=SL77919786-209982 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
Name: | us-gaap_SaleAndLeasebackTransactionGainLossNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SaleLeasebackTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SaleLeasebackTransactionDescriptionAxis=jack_MultiTenantCommercialPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SaleLeasebackTransactionDescriptionAxis=jack_RestaurantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SaleLeasebackTransactionDescriptionAxis=naics_ZZ921110
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |