SEGMENT REPORTING - Schedule of Operating Segments (Details) - USD ($) $ in Thousands		4 Months Ended
		Jan. 21, 2024	Jan. 22, 2023
Segment Reporting Information [Line Items]
Revenues		$ 487,498	$ 527,096
Depreciation and amortization		18,473	19,402
Acquisition, integration, and strategic initiatives	[1]	5,621	1,651
Share-based compensation		4,820	3,534
Net COLI gains		(4,834)	(5,724)
Losses (gains) on the sale of company-operated restaurants		254	(3,825)
Gains on acquisition of restaurants	[2]	2,357	0
Amortization of favorable and unfavorable leases and subleases, net		124	541
Earnings from operations		79,480	100,931
Jack in the Box restaurant operations
Segment Reporting Information [Line Items]
Revenues		368,340	366,917
Segment operating profit		116,043	128,780
Del Taco
Segment Reporting Information [Line Items]
Revenues		119,158	160,179
Segment operating profit		10,741	16,236
Corporate Segment
Segment Reporting Information [Line Items]
Segment operating profit		$ (25,203)	$ (28,506)

[1] Acquisition, integration, and strategic initiatives are related to the acquisition and integration of Del Taco, as well as strategic consulting fees.

[2] gains on acquisition of 9 Del Taco restaurants.