SEGMENT REPORTING - Schedule of Operating Segments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 09, 2023	Jul. 10, 2022	Jul. 09, 2023	Jul. 10, 2022
Segment Reporting Information [Line Items]
Revenues		$ 396,942	$ 398,305	$ 1,319,782	$ 1,065,310
Segment operating profit		76,234	77,160	271,910	235,200
Depreciation and amortization		14,460	16,713	48,460	40,754
Acquisition, integration, and restructuring costs	[1]	2,463	2,753	5,359	18,864
Share-based compensation		2,059	1,607	7,991	5,541
Net COLI (gains) losses		(579)	4,585	(7,147)	7,165
Gains on the sale of company-operated restaurants		(5,794)	(802)	(10,323)	(1,660)
Amortization of favorable and unfavorable leases and subleases, net		83	437	1,458	685
Earnings from operations		63,542	51,867	226,112	163,851
Total capital expenditures		32,641	13,568	56,669	34,349
Jack in the Box
Segment Reporting Information [Line Items]
Revenues		280,211	271,976	921,960	876,024
Segment operating profit		72,067	64,951	246,779	216,935
Depreciation and amortization		8,319	9,202	27,631	31,038
Total capital expenditures		24,588	7,603	39,844	24,933
Del Taco
Segment Reporting Information [Line Items]
Revenues		116,731	126,329	397,822	189,286
Segment operating profit		4,167	12,209	25,131	18,265
Depreciation and amortization		6,141	7,511	20,829	9,716
Total capital expenditures		$ 8,053	$ 5,965	$ 16,825	$ 9,416

[1] Acquisition, integration, and restructuring costs are related to the acquisition and integration of Del Taco.