$JACK
Jack in the Box Inc Stock $jack

$jack Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-Q Financial Statement

#000080788220000014 Filed on August 05, 2020

Income Statement

Concept	2020 Q3	2019 Q3	2019 Q2
Revenue	$242.3M	$221.2M	$215.7M
YoY Change	9.51%	24.66%	2.84%
Cost Of Revenue	$61.50M	$57.23M	$55.54M
YoY Change	7.45%	-9.92%	-33.78%
Gross Profit	$180.8M	$164.0M	$160.2M
YoY Change	10.23%	43.94%	27.24%
Gross Profit Margin	74.62%	74.13%	74.25%
Selling, General & Admin	$13.68M	$24.39M	$17.59M
YoY Change	-43.91%	23.98%	-33.88%
% of Gross Profit	7.57%	14.87%	10.98%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$12.14M	$12.79M	$12.69M
YoY Change	-5.04%	-3.09%	-9.06%
% of Gross Profit	6.72%	7.8%	7.92%
Operating Expenses	$13.68M	$24.39M	$17.59M
YoY Change	-43.91%	23.98%	-33.88%
Operating Profit	$61.79M	$48.52M	$47.12M
YoY Change	27.36%	36.1%	0.65%
Interest Expense	-$15.70M	-$36.50M	-$13.30M
YoY Change	-56.99%	234.86%	27.88%
% of Operating Profit	-25.41%	-75.23%	-28.22%
Other Income/Expense, Net	-$1.400M	-$300.0K	-$300.0K
YoY Change	366.67%	-25.0%	-25.0%
Pretax Income	$44.61M	$11.43M	$33.50M
YoY Change	290.44%	-82.55%	-7.97%
Income Tax	$12.43M	-$2.048M	$8.374M
% Of Pretax Income	27.87%	-17.93%	24.99%
Net Earnings	$32.56M	$22.06M	$25.09M
YoY Change	47.57%	35.6%	-47.3%
Net Earnings / Revenue	13.44%	9.97%	11.63%
Basic Earnings Per Share	$1.42	$0.86	$0.97
Diluted Earnings Per Share	$1.42	$0.85	$0.96
COMMON SHARES
Basic Shares Outstanding	22.85M shares	25.96M shares	25.94M shares
Diluted Shares Outstanding	22.92M shares	26.18M shares	26.15M shares

Balance Sheet

Concept	2020 Q3	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$159.5M	$12.40M	$1.600M
YoY Change	1186.29%	12300.0%	33.33%
Cash & Equivalents	$236.9M	$151.6M	$1.590M
Short-Term Investments
Other Short-Term Assets	$3.724M	$2.718M	$5.244M
YoY Change	37.01%	-40.89%	46.4%
Inventory	$1.808M	$1.776M	$1.949M
Prepaid Expenses	$10.11M	$9.015M	$13.46M
Receivables	$76.30M	$42.70M	$51.70M
Other Receivables	$11.90M	$14.90M	$18.50M
Total Short-Term Assets	$335.6M	$227.1M	$105.3M
YoY Change	47.75%	139.15%	-27.43%
LONG-TERM ASSETS
Property, Plant & Equipment	$336.0M	$391.9M	$398.6M
YoY Change	-14.28%	-6.61%	-10.09%
Goodwill	$47.16M	$46.75M	$46.75M
YoY Change	0.89%	0.0%	-1.41%
Intangibles	$300.0K	$39.00K	$486.0K
YoY Change	669.23%	-93.5%	-31.55%
Long-Term Investments
YoY Change
Other Assets	$1.235B	$339.4M	$207.4M
YoY Change	263.83%	70.34%	-13.02%
Total Long-Term Assets	$1.571B	$339.4M	$328.2M
YoY Change	362.82%	9.93%	14.53%
TOTAL ASSETS
Total Short-Term Assets	$335.6M	$227.1M	$105.3M
Total Long-Term Assets	$1.571B	$339.4M	$328.2M
Total Assets	$1.906B	$958.5M	$832.1M
YoY Change	98.91%	16.41%	-4.9%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$31.11M	$37.07M	$25.14M
YoY Change	-16.08%	-17.58%	2.63%
Accrued Expenses	$129.4M	$120.1M	$114.4M
YoY Change	7.78%	12.31%	14.19%
Deferred Revenue	$1.687M	$2.036M
YoY Change	-17.14%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$13.80M	$42.90M	$42.60M
YoY Change	-67.83%	30.65%	-0.7%
Total Short-Term Liabilities	$340.4M	$157.9M	$182.1M
YoY Change	115.52%	-14.04%	8.71%
LONG-TERM LIABILITIES
Long-Term Debt	$1.366B	$971.8M	$1.015B
YoY Change	40.58%	1.93%	12.72%
Other Long-Term Liabilities	$47.08M	$72.68M	$87.75M
YoY Change	-35.23%	-21.58%	-63.13%
Total Long-Term Liabilities	$2.360B	$1.538B	$1.243B
YoY Change	53.4%	24.91%	9.14%
TOTAL LIABILITIES
Total Short-Term Liabilities	$340.4M	$157.9M	$182.1M
Total Long-Term Liabilities	$2.360B	$1.538B	$1.243B
Total Liabilities	$2.700B	$1.696B	$1.425B
YoY Change	59.18%	19.86%	9.09%
SHAREHOLDERS EQUITY
Retained Earnings	$1.636B	$1.574B	$1.562B
YoY Change	3.94%	0.82%	2.66%
Common Stock	$490.3M	$481.1M	$476.7M
YoY Change	1.91%	2.01%	3.48%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.809B	$2.656B	$2.530B
YoY Change	5.78%	4.95%	10.48%
Treasury Stock Shares	59.65M shares	57.76M shares	56.33M shares
Shareholders Equity	-$793.4M	-$737.6M	-$592.5M
YoY Change
Total Liabilities & Shareholders Equity	$1.906B	$958.5M	$832.1M
YoY Change	98.91%	16.41%	-4.9%

Cashflow Statement

Concept	2020 Q3	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$32.56M	$22.06M	$25.09M
YoY Change	47.57%	35.6%	-47.3%
Depreciation, Depletion And Amortization	$12.14M	$12.79M	$12.69M
YoY Change	-5.04%	-3.09%	-9.06%
Cash From Operating Activities	$31.30M	$56.00M	$23.20M
YoY Change	-44.11%	88.55%	-166.48%
INVESTING ACTIVITIES
Capital Expenditures	-$3.900M	-$6.800M	-$7.000M
YoY Change	-42.65%	-8.11%	-39.66%
Acquisitions
YoY Change
Other Investing Activities	$3.900M	$16.00M	$3.100M
YoY Change	-75.63%	-56.76%	-99.01%
Cash From Investing Activities	-$100.0K	$9.100M	-$3.800M
YoY Change	-101.1%	-69.15%	-101.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.500M	-54.20M	-22.10M
YoY Change	-93.54%	-10.12%	-91.85%
NET CHANGE
Cash From Operating Activities	31.30M	56.00M	23.20M
Cash From Investing Activities	-100.0K	9.100M	-3.800M
Cash From Financing Activities	-3.500M	-54.20M	-22.10M
Net Change In Cash	27.70M	10.90M	-2.700M
YoY Change	154.13%	-1090.91%	-52.63%
FREE CASH FLOW
Cash From Operating Activities	$31.30M	$56.00M	$23.20M
Capital Expenditures	-$3.900M	-$6.800M	-$7.000M
Free Cash Flow	$35.20M	$62.80M	$30.20M
YoY Change	-43.95%	69.27%	-229.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0000807882
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-27
	dei	Local Phone Number LocalPhoneNumber	571-2121
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CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-07-05
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-9390
	dei	Entity Registrant Name EntityRegistrantName	JACK IN THE BOX INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	95-2698708
	dei	Entity Address Address Line1 EntityAddressAddressLine1	9357 Spectrum Center Blvd.
	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92123
	dei	City Area Code CityAreaCode	858
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	JACK
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21023000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15699000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	32176000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	13473000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	51536000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	69724000	USD
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	379000	USD
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-284000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	379000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	379000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2652000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	32555000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	13189000	USD
	us-gaap	Net Income Loss NetIncomeLoss	51915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	72376000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.41
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.52
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.22
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.69
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.02
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.02
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.10
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.24
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.79
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.40
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.51
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.21
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.67
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.02
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.02
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.10
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.77
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.80
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	32555000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	13189000	USD
	us-gaap	Net Income Loss NetIncomeLoss	51915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	72376000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-11499000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-23625000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-23715000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-24328000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	12216000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	703000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	6132000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	3165000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	6084000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-2462000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	19666000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-12841000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	1494000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	904000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	43166000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	3013000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	21160000	USD
CY2019Q3	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	904000	USD
	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	30325000	USD
	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	3013000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-5493000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-232000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7872000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-777000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-15667000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-672000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-22453000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2236000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	15667000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6756000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	22453000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-226000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	48222000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19945000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	74368000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	72150000	USD
	us-gaap	Net Income Loss NetIncomeLoss	51915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	72376000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	379000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	379000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2652000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	51536000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	69724000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	41151000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42645000	USD
	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	2383000	USD
	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	1524000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4337000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1903000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	71000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	66000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12567000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1745000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	7612000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6589000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	40972000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	1141000	USD
	jack	Gains Losses On Cash Surrender Value Of Company Owned Life Insurance GainsLossesOnCashSurrenderValueOfCompanyOwnedLifeInsurance	1861000	USD
	jack	Gains Losses On Cash Surrender Value Of Company Owned Life Insurance GainsLossesOnCashSurrenderValueOfCompanyOwnedLifeInsurance	3117000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	2625000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	219000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	10386000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	5756000	USD
	jack	Operating Lease Costs Non Cash OperatingLeaseCostsNonCash	5689000	USD
	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	195000	USD
	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	1624000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	39198000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	3555000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-14000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	79000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5034000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1509000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4620000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	24321000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	15755000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	9363000	USD
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	4921000	USD
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	5126000	USD
	us-gaap	Payments For Proceeds From Tenant Allowance PaymentsForProceedsFromTenantAllowance	7105000	USD
	us-gaap	Payments For Proceeds From Tenant Allowance PaymentsForProceedsFromTenantAllowance	7875000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-4844000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-16012000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	90168000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	116793000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	16736000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	25041000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	22790000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7563000	USD
	jack	Proceeds From Assets Held For Sale And Leaseback ProceedsFromAssetsHeldForSaleAndLeaseback	19828000	USD
	jack	Proceeds From Assets Held For Sale And Leaseback ProceedsFromAssetsHeldForSaleAndLeaseback	3056000	USD
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	-2625000	USD
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	-133000	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	15239000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1036000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	29543000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	950000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	111376000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	229798000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	3500000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	252800000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	7094000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	32611000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	216000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5088000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	18466000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	30929000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3559000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	696000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	155576000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14362000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4442000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2705000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-74359000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-108001000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	45352000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	9742000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	151561000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2705000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	196913000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12447000	USD
CY2020Q3	us-gaap	Number Of Restaurants NumberOfRestaurants	2244	restaurant
CY2019Q3	us-gaap	Number Of Restaurants NumberOfRestaurants	2242	restaurant
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
	us-gaap	Fiscal Period FiscalPeriod	<span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%;">Fiscal year</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;"> — Our fiscal year is 52 or 53 weeks ending the Sunday closest to September 30. Fiscal years 2020 and 2019 include 52 weeks. Our first quarter includes 16-weeks and all other quarters include 12-weeks. All comparisons between 2020 and 2019 refer to the 12-weeks (“quarter”) and 40-weeks (“year-to-date”) ended July 5, 2020 and July 7, 2019, respectively, unless otherwise indicated.</span>
	us-gaap	Use Of Estimates UseOfEstimates	<span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%;">Use of estimates</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;"> — In preparing the condensed consolidated financial statements in conformity with U.S. GAAP, management is required to make certain assumptions and estimates that affect reported amounts of assets, liabilities, revenues, expenses and the disclosure of contingencies. In making these assumptions and estimates, management may from time to time seek advice and consider information provided by actuaries and other experts in a particular area. Actual amounts could differ materially from these estimates.</span>
	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.90
	jack	Contractual Contributions Towards Advertising Costs Percentage Of Sales ContractualContributionsTowardsAdvertisingCostsPercentageOfSales	0.050
CY2020Q1	jack	Contractual Contributions Towards Advertising Costs Percentage Of Sales ContractualContributionsTowardsAdvertisingCostsPercentageOfSales	0.040
CY2020Q1	jack	Collection Period For Marketing Fees CollectionPeriodForMarketingFees	P24M
CY2020Q3	jack	Uncollected Postponed Marketing Fees UncollectedPostponedMarketingFees	16200000	USD
	jack	Incremental Corporate Advertising Contributions IncrementalCorporateAdvertisingContributions	2000000.0	USD
	jack	Incremental Corporate Advertising Contributions IncrementalCorporateAdvertisingContributions	0	USD
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3900000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	12800000	USD
CY2019Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	4000000.0	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	15000000.0	USD
CY2020Q3	us-gaap	Restricted Cash RestrictedCash	37400000	USD
CY2019Q3	us-gaap	Restricted Cash RestrictedCash	26000000.0	USD
CY2019Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	29000000.0	USD
CY2019Q3	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	2100000	USD
CY2019Q3	jack	Exit Related Lease Liabilities ExitRelatedLeaseLiabilities	19400000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Asset Off Market Lease Favorable Gross FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross	400000	USD
CY2019Q3	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-2900000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	880564000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	425000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	39000	USD
CY2019Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	85564000	USD
CY2019Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	86570000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	159821000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	120083000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	115381000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	770818000	USD
CY2019Q3	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	263770000	USD
CY2019Q3	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	221887000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1577034000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1574164000	USD
	jack	Franchise Fees Current Standard FranchiseFeesCurrentStandard	50000	USD
	jack	Royalty And Marketing Fee Percent Of Gross Sales RoyaltyAndMarketingFeePercentOfGrossSales	0.05
CY2020Q3	us-gaap	Revenues Revenues	242275000	USD
CY2019Q3	us-gaap	Revenues Revenues	222359000	USD
	us-gaap	Revenues Revenues	766105000	USD
	us-gaap	Revenues Revenues	728872000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	46272000	USD
CY2018Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	50018000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	4249000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	3953000	USD
	jack	Contract With Customer Liability Additions ContractWithCustomerLiabilityAdditions	1923000	USD
	jack	Contract With Customer Liability Additions ContractWithCustomerLiabilityAdditions	970000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	43946000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	47035000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1136000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4947000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4742000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4590000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4398000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	24133000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	43946000	USD
	us-gaap	Significant Changes Franchises Sold SignificantChangesFranchisesSold	0	restaurant
	us-gaap	Significant Changes Franchises Sold SignificantChangesFranchisesSold	0	restaurant
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	2600000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	200000	USD
CY2020Q3	jack	Number Of New Restaurants Opened By Franchisees NumberOfNewRestaurantsOpenedByFranchisees	4	restaurant
CY2019Q3	jack	Number Of New Restaurants Opened By Franchisees NumberOfNewRestaurantsOpenedByFranchisees	5	restaurant
	jack	Number Of New Restaurants Opened By Franchisees NumberOfNewRestaurantsOpenedByFranchisees	20	restaurant
	jack	Number Of New Restaurants Opened By Franchisees NumberOfNewRestaurantsOpenedByFranchisees	16	restaurant
CY2020Q3	jack	Number Of Franchised Restaurants Closed NumberOfFranchisedRestaurantsClosed	6	restaurant
CY2019Q3	jack	Number Of Franchised Restaurants Closed NumberOfFranchisedRestaurantsClosed	3	restaurant
	jack	Number Of Franchised Restaurants Closed NumberOfFranchisedRestaurantsClosed	18	restaurant
	jack	Number Of Franchised Restaurants Closed NumberOfFranchisedRestaurantsClosed	11	restaurant
CY2020Q3	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P20Y
CY2020Q3	jack	Lessee Temporary Rent Concession Deferral Of Payment LesseeTemporaryRentConcessionDeferralOfPayment	15500000	USD
CY2020Q3	jack	Lessee Lease Liabilities Subject To Accretion LesseeLeaseLiabilitiesSubjectToAccretion	934500000	USD
CY2020Q3	jack	Lessee Lease Liabilities Deferred LesseeLeaseLiabilitiesDeferred	12700000	USD
CY2020Q3	jack	Lessor Portion Of Monthly Rent Postponed Percent LessorPortionOfMonthlyRentPostponedPercent	0.40
CY2020Q2	jack	Lessor Portion Of Monthly Rent Postponed Amount LessorPortionOfMonthlyRentPostponedAmount	9100000	USD
CY2020Q3	jack	Lessor Rent Concession Deferrals Passed Through To Lessees LessorRentConcessionDeferralsPassedThroughToLessees	5600000	USD
	jack	Collected Postponed Marketing Fees CollectedPostponedMarketingFees	6200000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	902858000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2511000	USD
CY2020Q3	jack	Right Of Use Asset RightOfUseAsset	905369000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	169347000	USD
CY2020Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	821000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	777883000	USD
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	2306000	USD
CY2020Q3	jack	Lease Liabilities LeaseLiabilities	950357000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	177000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	590000	USD
CY2020Q3	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	27000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	88000	USD
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	44006000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	146409000	USD
CY2020Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	46000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	149000	USD
CY2020Q3	us-gaap	Variable Lease Cost VariableLeaseCost	9494000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	31317000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	53750000	USD
	us-gaap	Lease Cost LeaseCost	178553000	USD
CY2020Q3	jack	Variable Lease Cost Executory Cost VariableLeaseCostExecutoryCost	8600000	USD
	jack	Variable Lease Cost Executory Cost VariableLeaseCostExecutoryCost	28800000	USD
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y3M18D
CY2020Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.036
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.042
CY2020Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	405000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	38311000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	917000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	211404000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	906000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	163586000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	893000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	136250000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	217000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	49000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	191090000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	484203000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	3127000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	104566000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	947230000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	3387000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1138320000	USD
CY2020Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	260000	USD
CY2020Q3	jack	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Decrease Due To Rent Concessions LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYearDecreaseDueToRentConcessions	5500000	USD
CY2020Q3	jack	Lessee Operating Lease Liability Payments Due Year Two Increase Due To Rent Concessions In Prior Year LesseeOperatingLeaseLiabilityPaymentsDueYearTwoIncreaseDueToRentConcessionsInPriorYear	7300000	USD
CY2020Q3	jack	Finance Lease Noncancellable Commitments FinanceLeaseNoncancellableCommitments	3400000	USD
CY2020Q3	jack	Operating Lease Noncancellable Commitments OperatingLeaseNoncancellableCommitments	1080000000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	879000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	193313000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	879000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	186226000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	879000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	145794000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	864000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	117753000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	396000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	87420000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	40000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	363505000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	3937000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1094011000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	343000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	3594000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	151981000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	88000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	593000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	143604000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	132000	USD
CY2020Q2	jack	Notice Period For Termination Of Lease Without Penalty NoticePeriodForTerminationOfLeaseWithoutPenalty	P90D
CY2020Q3	jack	Operating Lease Income Closed Restaurants And Other OperatingLeaseIncomeClosedRestaurantsAndOther	1442000	USD
	jack	Operating Lease Income Closed Restaurants And Other OperatingLeaseIncomeClosedRestaurantsAndOther	4969000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	44093000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	262910000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	233084000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	226507000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	201325000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	1259936000	USD
CY2020Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	2227855000	USD
CY2020Q3	jack	Lessor Portion Of Monthly Rent Postponed Amount LessorPortionOfMonthlyRentPostponedAmount	2900000	USD
CY2020Q3	jack	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year Decrease Due To Rent Concessions LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYearDecreaseDueToRentConcessions	1900000	USD
CY2020Q3	jack	Lessor Operating Lease Payments To Be Received Two Years Increase Due To Rent Concessions In Year One LessorOperatingLeasePaymentsToBeReceivedTwoYearsIncreaseDueToRentConcessionsInYearOne	2700000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	239219000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	255315000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	231394000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	224605000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	199442000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	1215811000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	2365786000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	3127000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	3594000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	1404503000	USD
CY2019Q3	us-gaap	Long Term Debt LongTermDebt	1303594000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	13821000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	774000	USD
CY2020Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	24511000	USD
CY2019Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	28446000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1366171000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1274374000	USD
CY2020Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Obligations FairValueLiabilitiesMeasuredOnRecurringBasisObligations	26638000	USD
CY2019Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Obligations FairValueLiabilitiesMeasuredOnRecurringBasisObligations	30104000	USD
CY2019	jack	Paymentsto Terminate Derivative Contract PaymentstoTerminateDerivativeContract	23600000	USD
CY2020Q3	us-gaap	Restructuring Costs RestructuringCosts	2000	USD
CY2019Q3	us-gaap	Restructuring Costs RestructuringCosts	-64000	USD
	us-gaap	Restructuring Costs RestructuringCosts	1165000	USD
	us-gaap	Restructuring Costs RestructuringCosts	6722000	USD
CY2020Q3	us-gaap	Business Exit Costs1 BusinessExitCosts1	890000	USD
CY2019Q3	us-gaap	Business Exit Costs1 BusinessExitCosts1	2010000	USD
	us-gaap	Business Exit Costs1 BusinessExitCosts1	1322000	USD
	us-gaap	Business Exit Costs1 BusinessExitCosts1	3259000	USD
CY2020Q3	jack	Accelerateddepreciation Accelerateddepreciation	62000	USD
CY2019Q3	jack	Accelerateddepreciation Accelerateddepreciation	416000	USD
	jack	Accelerateddepreciation Accelerateddepreciation	62000	USD
	jack	Accelerateddepreciation Accelerateddepreciation	1342000	USD
CY2020Q3	jack	Impairment And Other Costs Net ImpairmentAndOtherCostsNet	738000	USD
CY2019Q3	jack	Impairment And Other Costs Net ImpairmentAndOtherCostsNet	-3256000	USD
	jack	Impairment And Other Costs Net ImpairmentAndOtherCostsNet	-7837000	USD
	jack	Impairment And Other Costs Net ImpairmentAndOtherCostsNet	5567000	USD
CY2020Q3	us-gaap	Restructuring Costs RestructuringCosts	2000	USD
CY2019Q3	us-gaap	Restructuring Costs RestructuringCosts	-64000	USD
	us-gaap	Restructuring Costs RestructuringCosts	1165000	USD
	us-gaap	Restructuring Costs RestructuringCosts	6722000	USD
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.279
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.290
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.179
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.184
	jack	Number Of Defined Benefit Pension Plans Sponsored NumberOfDefinedBenefitPensionPlansSponsored	2	defined_benefit_plan
	us-gaap	Defined Benefit Plan Settlements Plan Assets DefinedBenefitPlanSettlementsPlanAssets	122300000	USD
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	38600000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	300000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	100000	USD
	jack	Postretirement Medical Plan Number Sponsored PostretirementMedicalPlanNumberSponsored	2	healthcare_plan
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.058
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.059
CY2020Q1	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.052
CY2020Q2	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.054
CY2019Q1	jack	Minimum Required Contribution For Retirement Plans MinimumRequiredContributionForRetirementPlans	0	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	-876926000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	-592514000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	-737584000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	-591699000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	453000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3559000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6756000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	696000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1747000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1881000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7612000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6589000	USD
CY2020Q3	us-gaap	Dividends Dividends	0	USD
CY2019Q3	us-gaap	Dividends Dividends	10326000	USD
	us-gaap	Dividends Dividends	18492000	USD
	us-gaap	Dividends Dividends	30967000	USD
CY2020Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	0	USD
CY2019Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	0	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	153550000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	0	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	32555000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	13189000	USD
	us-gaap	Net Income Loss NetIncomeLoss	51915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	72376000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	15667000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	22453000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-226000	USD
CY2020Q3	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	0	USD
CY2019Q3	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	0	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-2870000	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-37330000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	-826957000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	-580561000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	-826957000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	-580561000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1900000	shares
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	81.41
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	153500000	USD
CY2020Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2020Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2020Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	122200000	USD
	jack	Stock Repurchase Transactions Initiated In Prior Year StockRepurchaseTransactionsInitiatedInPriorYear	2000000.0	USD
	jack	Number Of Cash Dividends Declared NumberOfCashDividendsDeclared	2	dividend
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18500000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	22847000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25958000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23192000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25933000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	22916000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26176000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23322000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26150000	shares
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	344000	shares
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	186000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	334000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	186000	shares
CY2020Q3	jack	Excluded From Diluted Weighted Average Shares Performance Conditions Not Satisfied ExcludedFromDilutedWeightedAverageSharesPerformanceConditionsNotSatisfied	77000	shares
CY2019Q3	jack	Excluded From Diluted Weighted Average Shares Performance Conditions Not Satisfied ExcludedFromDilutedWeightedAverageSharesPerformanceConditionsNotSatisfied	89000	shares
	jack	Excluded From Diluted Weighted Average Shares Performance Conditions Not Satisfied ExcludedFromDilutedWeightedAverageSharesPerformanceConditionsNotSatisfied	77000	shares
	jack	Excluded From Diluted Weighted Average Shares Performance Conditions Not Satisfied ExcludedFromDilutedWeightedAverageSharesPerformanceConditionsNotSatisfied	89000	shares
CY2020Q3	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	14900000	USD
CY2019Q3	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	10000000.0	USD
	us-gaap	Discontinued Operation Period Of Continuing Involvement After Disposal DiscontinuedOperationPeriodOfContinuingInvolvementAfterDisposal	P12M
	jack	Discontinued Operation Period Of Continuing Involvement After Disposal Number Of Extension Options DiscontinuedOperationPeriodOfContinuingInvolvementAfterDisposalNumberOfExtensionOptions	2	extnsion_option
	jack	Discontinued Operation Period Of Continuing Involvement After Disposal Service Period Extension Option DiscontinuedOperationPeriodOfContinuingInvolvementAfterDisposalServicePeriodExtensionOption	P3M
CY2019Q3	us-gaap	Other Nonrecurring Income OtherNonrecurringIncome	900000	USD
	us-gaap	Other Nonrecurring Income OtherNonrecurringIncome	6500000	USD
CY2019Q3	us-gaap	Disposal Group Including Discontinued Operation Accrued Income Tax Payable DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxPayable	2800000	USD
CY2020Q3	us-gaap	Contractual Obligation ContractualObligation	29300000	USD
	jack	Lessee Guaranteed Leases Remaining Term LesseeGuaranteedLeasesRemainingTerm	P15Y
CY2020Q3	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	0	USD
	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	-2025000	USD
	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	-14362000	USD
	us-gaap	Increase Decrease In Construction Payables IncreaseDecreaseInConstructionPayables	2534000	USD
	us-gaap	Increase Decrease In Construction Payables IncreaseDecreaseInConstructionPayables	5421000	USD
	jack	Increasedecreaseindividendsaccruedorconvertedtostockequivalents Increasedecreaseindividendsaccruedorconvertedtostockequivalents	65000	USD
	jack	Increasedecreaseindividendsaccruedorconvertedtostockequivalents Increasedecreaseindividendsaccruedorconvertedtostockequivalents	184000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Accounts Receivable Acquired1 NoncashOrPartNoncashAcquisitionAccountsReceivableAcquired1	859000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Accounts Receivable Acquired1 NoncashOrPartNoncashAcquisitionAccountsReceivableAcquired1	0	USD
	jack	Increase Decrease In Capital Lease Obligations IncreaseDecreaseInCapitalLeaseObligations	24000	USD
	jack	Increase Decrease In Capital Lease Obligations IncreaseDecreaseInCapitalLeaseObligations	41000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	82132000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	36907000	USD
CY2020Q3	us-gaap	Notes And Loans Receivable Gross Current NotesAndLoansReceivableGrossCurrent	505000	USD
CY2019Q3	us-gaap	Notes And Loans Receivable Gross Current NotesAndLoansReceivableGrossCurrent	278000	USD
CY2020Q3	us-gaap	Income Tax Receivable IncomeTaxReceivable	1172000	USD
CY2019Q3	us-gaap	Income Tax Receivable IncomeTaxReceivable	160000	USD
CY2020Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	10273000	USD
CY2019Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	10855000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5840000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2965000	USD
CY2020Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	88242000	USD
CY2019Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	45235000	USD
CY2020Q3	us-gaap	Prepaid Taxes PrepaidTaxes	6881000	USD
CY2019Q3	us-gaap	Prepaid Taxes PrepaidTaxes	579000	USD
CY2020Q3	us-gaap	Prepaid Advertising PrepaidAdvertising	32000	USD
CY2019Q3	us-gaap	Prepaid Advertising PrepaidAdvertising	1838000	USD
CY2020Q3	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	6534000	USD
CY2019Q3	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	6598000	USD
CY2020Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	13447000	USD
CY2019Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	9015000	USD
CY2020Q3	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	112984000	USD
CY2019Q3	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	112753000	USD
CY2020Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	48832000	USD
CY2019Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	49333000	USD
CY2020Q3	us-gaap	Tenant Improvements TenantImprovements	29967000	USD
CY2019Q3	us-gaap	Tenant Improvements TenantImprovements	26925000	USD
CY2020Q3	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	24225000	USD
CY2019Q3	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	17674000	USD
CY2020Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	216008000	USD
CY2019Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	206685000	USD
CY2020Q3	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	25605000	USD
CY2019Q3	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	27888000	USD
CY2020Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	30214000	USD
CY2019Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	31095000	USD
CY2020Q3	jack	Deferred Franchise Fees Accrued Liabilities DeferredFranchiseFeesAccruedLiabilities	4934000	USD
CY2019Q3	jack	Deferred Franchise Fees Accrued Liabilities DeferredFranchiseFeesAccruedLiabilities	4978000	USD
CY2020Q3	jack	Accrued Sales And Property Taxes Current AccruedSalesAndPropertyTaxesCurrent	15428000	USD
CY2019Q3	jack	Accrued Sales And Property Taxes Current AccruedSalesAndPropertyTaxesCurrent	4268000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2214000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2036000	USD
CY2020Q3	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	17347000	USD
CY2019Q3	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	915000	USD
CY2020Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	47602000	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	48903000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	143344000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	120083000	USD
CY2020Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	126217000	USD
CY2019Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	120260000	USD
CY2020Q3	jack	Deferredfranchisefees Noncurrent DeferredfranchisefeesNoncurrent	39012000	USD
CY2019Q3	jack	Deferredfranchisefees Noncurrent DeferredfranchisefeesNoncurrent	41295000	USD
CY2020Q3	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	0	USD
CY2019Q3	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	29537000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	51523000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	72678000	USD
CY2020Q3	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	216752000	USD
CY2019Q3	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	263770000	USD

Files In Submission

Name	View Source	Status
0000807882-20-000014-index-headers.html	Edgar Link	pending
0000807882-20-000014-index.html	Edgar Link	pending
0000807882-20-000014.txt	Edgar Link	pending
0000807882-20-000014-xbrl.zip	Edgar Link	pending
exfy20q310218.htm	Edgar Link	pending
exfy20q3311.htm	Edgar Link	pending
exfy20q3312.htm	Edgar Link	pending
exfy20q3321.htm	Edgar Link	pending
exfy20q3322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
jack-20200705.htm	Edgar Link	pending
jack-20200705.xsd	Edgar Link	pending
jack-20200705_cal.xml	Edgar Link	unprocessable
jack-20200705_def.xml	Edgar Link	unprocessable
jack-20200705_g1.jpg	Edgar Link	pending
jack-20200705_htm.xml	Edgar Link	completed
jack-20200705_lab.xml	Edgar Link	unprocessable
jack-20200705_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$JACK
Jack in the Box Inc Stock $jack

2020 Q3 Form 10-Q Financial Statement

#000080788220000014 Filed on August 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JACK Jack in the Box Inc Stock $jack

2020 Q3 Form 10-Q Financial Statement

#000080788220000014 Filed on August 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JACK
Jack in the Box Inc Stock $jack