SEGMENT REPORTING - Schedule of Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 10, 2022	Jul. 04, 2021	Jul. 10, 2022	Jul. 04, 2021
Segment Reporting Information [Line Items]
Revenues:	$ 398,305	$ 269,458	$ 1,065,310	$ 865,216
Segment operating profit	77,160	75,397	235,200	248,163
Depreciation and amortization	16,713	10,389	40,754	35,656
Acquisition, integration, and restructuring costs	2,753	0	18,864	4
Share-based compensation	1,607	502	5,541	3,338
Net COLI losses (gains)	4,585	(2,611)	7,165	(8,951)
Gains on the sale of company-operated restaurants	(802)	(264)	(1,660)	(3,079)
Amortization of favorable and unfavorable leases and subleases, net	437	0	685	0
Earnings from operations	51,867	67,381	163,851	221,195
Total capital expenditures	13,568	12,229	34,349	35,157
Jack in the Box
Segment Reporting Information [Line Items]
Revenues:	271,976	269,458	876,024	865,216
Segment operating profit	64,951	75,397	216,935	248,163
Depreciation and amortization	9,202	10,389	31,038	35,656
Total capital expenditures	7,603	12,229	24,933	35,157
Del Taco
Segment Reporting Information [Line Items]
Revenues:	126,329	0	189,286	0
Segment operating profit	12,209	0	18,265	0
Depreciation and amortization	7,511	0	9,716	0
Total capital expenditures	$ 5,965	$ 0	$ 9,416	$ 0