Impairment, Disposition Of Property And Equipment, Restaurant Closing Costs And Restructuring (Details) (USD $) In Thousands, unless otherwise specified	4 Months Ended
	Jan. 18, 2015	Jan. 19, 2014
Restructuring Cost and Reserve [Line Items]
Losses (gains) on the disposition of property and equipment, net	$ 1,243	$ 992
Business Exit Costs	786	564
Impairment and other charges, net	2,180	1,909
Restructuring Reserve [Roll Forward]
Restructuring Charges	7	298
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Balance at beginning of period	13,173	16,321
Cash payments	(1,665)	(1,434)
Balance at end of period	12,383	15,499
Restructuring costs	875	612
Jack In The Box Restaurants [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	215	95
Continuing Operations [Member]
Restructuring Cost and Reserve [Line Items]
Losses (gains) on the disposition of property and equipment, net	$ 1,172	$ 952