Segment Reporting (Tables)

12 Months Ended

Oct. 01, 2017

Segment Reporting [Abstract]

Summarized Financial Information Of Reportable Segments

	2017			2016			2015
Revenues by segment:
Jack in the Box restaurant operations	$	1,097,291		$	1,162,258		$	1,145,176
Qdoba restaurant operations	456,623			437,073			395,141
Consolidated revenues	$	1,553,914		$	1,599,331		$	1,540,317
Earnings from operations by segment:
Jack in the Box restaurant operations	$	280,097		$	290,346		$	265,230
Qdoba restaurant operations	31,031			47,250			47,264
Shared services and unallocated costs	(83,021		)	(108,911		)	(112,182		)
Gains (losses) on the sale of company-operated restaurants	38,034			1,230			(3,139		)
Consolidated earnings from operations	266,141			229,915			197,173
Interest expense, net	46,518			31,081			18,803
Consolidated earnings from continuing operations and before income taxes	$	219,623		$	198,834		$	178,370
Total expenditures for long-lived assets by segment:
Jack in the Box restaurant operations	$	29,426		$	38,607		$	41,928
Qdoba restaurant operations	34,163			53,316			34,071
Shared services and unallocated costs	3,864			4,692			10,227
Consolidated expenditures for long-lived assets	$	67,453		$	96,615		$	86,226
Total depreciation expense by segment:
Jack in the Box restaurant operations	$	60,595		$	66,287		$	64,597
Qdoba restaurant operations	20,854			19,306			17,103
Shared services and unallocated costs	6,761			6,489			7,078
Consolidated depreciation expense	$	88,210		$	92,082		$	88,778