| Component: (Network and Table) | |
|---|---|
| Network | 2409405 - Disclosure - Impairment, Disposition Of Property And Equipment, Restaurant Closing Costs And Restructuring Restructuring Costs (Details) (http://www.jackinthebox.com/role/ImpairmentDispositionOfPropertyAndEquipmentRestaurantClosingCostsAndRestructuringRestructuringCostsDetails) |
| Table | Schedule of Restructuring and Related Costs [Table] |
| Reporting Entity [Axis] | 0000807882 (http://www.sec.gov/CIK) |
| Restructuring Cost and Reserve [Line Items] | Period [Axis] | ||||
|---|---|---|---|---|---|
2011-10-03 - 2012-09-30 | 2010-10-04 - 2011-10-02 | 2009-09-28 - 2010-10-03 | |||
| Restructuring Cost and Reserve [Axis] | Restructuring Cost and Reserve [Axis] | Restructuring Cost and Reserve [Axis] | |||
| Employee Severance [Member] | Type of Restructuring [Domain] | Employee Severance [Member] | Type of Restructuring [Domain] | Type of Restructuring [Domain] | |
Enhanced pension benefits | 6,167,000 | ||||
Severance costs | 6,987,000 | ||||
Other restructuring costs | 2,307,000 | ||||
Restructuring costs | 15,461,000 | 0 | 0 | ||
Restructuring Reserve [Roll Forward] | |||||
Balance at beginning of year | 0 | ||||
Additions | 6,987,000 | ||||
Cash payments | (5,229,000) | ||||
Balance at end of year | 1,758,000 | 0 | |||