Variable Interest Entities (Assets Of Jack In The Box Franchise Finance, LLC ("FFE")) (Details) (USD $)	Jul. 10, 2011		Oct. 03, 2010
Other current assets	$ 2,301,000		$ 3,592,000
Jack In The Box Franchise Finance, LLC ("FFE") [Member]
Cash	157,000
Other current assets	947,000	[1]
Other assets, net	7,325,000	[1]
Total assets	8,429,000
Deferred finance fees	$ 900,000

[1] Consists primarily of amounts due from franchisees and $0.9 million of deferred finance fees included in other assets, net.