$NJR
NEW JERSEY RESOURCES CORP Stock $njr

$njr Overview Financials Valuation SEC Filings Company Website

2019 Q3 Form 10-K Financial Statement

#000035630919000133 Filed on November 22, 2019

Income Statement

Concept	2019 Q3	2019	2018 Q3
Revenue	$479.1M	$2.592B	$647.3M
YoY Change	-25.99%	-11.08%	20.65%
Cost Of Revenue	$386.8M	$2.044B	$552.6M
YoY Change	-30.0%	2.69%	17.23%
Gross Profit	$92.30M	$547.7M	$94.70M
YoY Change	-2.53%	-40.74%	45.47%
Gross Profit Margin	19.27%	21.13%	14.63%
Selling, General & Admin	$1.800M	$43.70M	$2.100M
YoY Change	-14.29%	-15.64%	-16.0%
% of Gross Profit	1.95%	7.98%	2.22%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$24.40M	$81.11M	$21.10M
YoY Change	15.64%	5.93%	-1.86%
% of Gross Profit	26.44%	14.81%	22.28%
Operating Expenses	$100.1M	$2.438B	$113.1M
YoY Change	-11.49%	-10.21%	16.36%
Operating Profit	-$4.951M	$164.6M	-$18.34M
YoY Change	-73.01%	-21.27%	-42.77%
Interest Expense	-$4.800M	$47.08M	-$6.200M
YoY Change	-22.58%	1.72%	-47.01%
% of Operating Profit		28.61%
Other Income/Expense, Net	$1.200M	$11.27M	-$1.000M
YoY Change	-220.0%	-13.6%	-147.62%
Pretax Income	-$11.40M	$128.7M	-$25.60M
YoY Change	-55.47%	-26.75%	-38.61%
Income Tax	-$25.90M	$18.44M	$12.90M
% Of Pretax Income		14.32%
Net Earnings	-$12.03M	$123.9M	-$16.26M
YoY Change	-26.01%	-46.35%	-55.49%
Net Earnings / Revenue	-2.51%	4.78%	-2.51%
Basic Earnings Per Share	-$0.16	$1.39	-$0.18
Diluted Earnings Per Share	-$0.17	$1.38	-$0.18
COMMON SHARES
Basic Shares Outstanding	89.98M shares	89.24M shares	88.28M shares
Diluted Shares Outstanding		89.60M shares

Balance Sheet

Concept	2019 Q3	2019	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.700M	$2.700M	$1.500M
YoY Change	80.0%	80.0%	-31.82%
Cash & Equivalents	$2.676M	$2.700M	$1.458M
Short-Term Investments
Other Short-Term Assets	$22.40M	$179.1M	$33.73M
YoY Change	-33.61%	-50.22%	1.41%
Inventory	$184.3M	$184.3M	$198.5M
Prepaid Expenses
Receivables	$133.1M	$133.1M	$199.8M
Other Receivables	$12.40M	$12.40M	$10.40M
Total Short-Term Assets	$511.6M	$511.6M	$770.1M
YoY Change	-33.56%	-33.57%	32.9%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.041B	$3.041B	$2.651B
YoY Change	14.72%	14.72%	1.58%
Goodwill
YoY Change
Intangibles	$14.61M		$23.38M
YoY Change	-37.49%		-43.1%
Long-Term Investments	$200.3M	$200.3M	$190.9M
YoY Change	4.93%	-10.5%	10.59%
Other Assets	$116.1M	$566.5M	$96.23M
YoY Change	20.61%	29.96%	28.61%
Total Long-Term Assets	$820.2M	$3.861B	$722.5M
YoY Change	13.52%	14.46%	-2.27%
TOTAL ASSETS
Total Short-Term Assets	$511.6M	$511.6M	$770.1M
Total Long-Term Assets	$820.2M	$3.861B	$722.5M
Total Assets	$4.158B	$4.373B	$3.986B
YoY Change	4.31%	5.53%	1.47%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$129.7M	$267.8M	$135.2M
YoY Change	-4.08%	-22.98%	39.6%
Accrued Expenses
YoY Change
Deferred Revenue			$27.33M
YoY Change
Short-Term Debt	$25.45M	$25.50M	$152.0M
YoY Change	-83.25%	-83.22%	-42.88%
Long-Term Debt Due	$21.40M	$21.40M	$123.5M
YoY Change	-82.67%	-82.67%	-25.33%
Total Short-Term Liabilities	$446.4M	$446.4M	$751.0M
YoY Change	-40.56%	-40.56%	-6.47%
LONG-TERM LIABILITIES
Long-Term Debt	$1.537B	$1.537B	$1.181B
YoY Change	30.2%	30.2%	18.4%
Other Long-Term Liabilities	$11.95M	$643.4M	$8.959M
YoY Change	33.33%	17.69%	-10.3%
Total Long-Term Liabilities	$792.6M	$2.181B	$793.1M
YoY Change	-0.07%	26.24%	-11.08%
TOTAL LIABILITIES
Total Short-Term Liabilities	$446.4M	$446.4M	$751.0M
Total Long-Term Liabilities	$792.6M	$2.181B	$793.1M
Total Liabilities	$1.239B	$2.821B	$1.544B
YoY Change	-19.76%	3.55%	-8.89%
SHAREHOLDERS EQUITY
Retained Earnings	$906.1M		$1.007B
YoY Change	-10.03%		16.03%
Common Stock	$518.0M		$500.9M
YoY Change	3.4%		13.35%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$10.44M		$76.47M
YoY Change	-86.35%		9.19%
Treasury Stock Shares	660.7K shares		2.185M shares
Shareholders Equity	$1.382B	$1.552B	$1.295B
YoY Change
Total Liabilities & Shareholders Equity	$4.158B	$4.373B	$4.144B
YoY Change	0.34%	5.53%	5.48%

Cashflow Statement

Concept	2019 Q3	2019	2018 Q3
OPERATING ACTIVITIES
Net Income	-$12.03M	$123.9M	-$16.26M
YoY Change	-26.01%	-46.35%	-55.49%
Depreciation, Depletion And Amortization	$24.40M	$81.11M	$21.10M
YoY Change	15.64%	5.93%	-1.86%
Cash From Operating Activities	$23.60M	$194.1M	$5.700M
YoY Change	314.04%	-51.26%	-77.11%
INVESTING ACTIVITIES
Capital Expenditures	-$169.2M	$300.0M	-$112.9M
YoY Change	49.87%	45.03%	40.77%
Acquisitions
YoY Change
Other Investing Activities	-$8.400M	$198.4M	-$6.000M
YoY Change	40.0%	-649.58%	-91.07%
Cash From Investing Activities	-$177.6M	-$287.4M	-$118.9M
YoY Change	49.37%	-22.97%	-19.34%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$16.72M
YoY Change		-2.45%
Debt Paid & Issued, Net		$218.6M
YoY Change		32.12%
Cash From Financing Activities	131.4M	$95.60M	113.5M
YoY Change	15.77%	-468.34%	81.6%
NET CHANGE
Cash From Operating Activities	23.60M	$194.1M	5.700M
Cash From Investing Activities	-177.6M	-$287.4M	-118.9M
Cash From Financing Activities	131.4M	$95.60M	113.5M
Net Change In Cash	-22.60M	$2.353M	300.0K
YoY Change	-7633.33%	-410.01%	-100.5%
FREE CASH FLOW
Cash From Operating Activities	$23.60M	$194.1M	$5.700M
Capital Expenditures	-$169.2M	$300.0M	-$112.9M
Free Cash Flow	$192.8M	-$105.9M	$118.6M
YoY Change	62.56%	-155.33%	12.84%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000356309
CY2019	njr	Site Contingency Recoveryfrom Third Partyof Environmental Remediation Cost Period SiteContingencyRecoveryfromThirdPartyofEnvironmentalRemediationCostPeriod	P7Y
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.0375
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.11
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.19
CY2018Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2.5
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2.5
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	88292956	shares
CY2019Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	89998788	shares
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3487000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	573000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-6106000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-858000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	4401000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-6973000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2018Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	2185013	shares
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	660734	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-08359
CY2019	dei	Entity Registrant Name EntityRegistrantName	NEW JERSEY RESOURCES CORPORATION
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-2376465
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	1415 Wyckoff Road,
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Wall,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	07719
CY2019	dei	City Area Code CityAreaCode	(732)
CY2019	dei	Local Phone Number LocalPhoneNumber	938‑1000
CY2019	dei	Security12b Title Security12bTitle	Common Stock ‑ $2.50 Par Value
CY2019	dei	Trading Symbol TradingSymbol	NJR
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q1	dei	Entity Public Float EntityPublicFloat	4363911091	USD
CY2019Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	90164811	shares
CY2019	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	710793000	USD
CY2018	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	731865000	USD
CY2017	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	695637000	USD
CY2019	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1881252000	USD
CY2018	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	2183244000	USD
CY2017	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1572980000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2018	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2915109000	USD
CY2017	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2268617000	USD
CY2019	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	7948000	USD
CY2018	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	8505000	USD
CY2017	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	8340000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	256951000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	263113000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	222176000	USD
CY2019	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	33937000	USD
CY2018	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	38969000	USD
CY2017	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	40243000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91730000	USD
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CY2019	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	11190000	USD
CY2018	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	52102000	USD
CY2017	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	49366000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	2438110000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	2715227000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	2097393000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	153935000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	199882000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	171224000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11273000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	13047000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	10257000	USD
CY2019	us-gaap	Interest Expense InterestExpense	47082000	USD
CY2018	us-gaap	Interest Expense InterestExpense	46286000	USD
CY2017	us-gaap	Interest Expense InterestExpense	44886000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	118126000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	166643000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	136595000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37751000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-53785000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18343000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13628000	USD
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CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13813000	USD
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CY2018	us-gaap	Net Income Loss NetIncomeLoss	233436000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	132065000	USD
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CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	87689000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86321000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89616000	shares
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	169505000	USD
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CY2017	us-gaap	Net Income Loss NetIncomeLoss	132065000	USD
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CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6078000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11899000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	153774000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	227358000	USD
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CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	11241000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1567000	USD
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CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	645000	USD
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CY2019	njr	Amortization Of Acquired Contracts AmortizationOfAcquiredContracts	8424000	USD
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CY2017	njr	Amortization Of Acquired Contracts AmortizationOfAcquiredContracts	762000	USD
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CY2017	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	3867000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2387000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2579000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2023000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-59013000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15590000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	41442000	USD
CY2019	njr	Deferred Income Tax Benefit Tax Legislation DeferredIncomeTaxBenefitTaxLegislation	0	USD
CY2018	njr	Deferred Income Tax Benefit Tax Legislation DeferredIncomeTaxBenefitTaxLegislation	-75736000	USD
CY2017	njr	Deferred Income Tax Benefit Tax Legislation DeferredIncomeTaxBenefitTaxLegislation	0	USD
CY2019	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	6482000	USD
CY2018	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	0	USD
CY2017	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	0	USD
CY2019	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	13878000	USD
CY2018	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	16171000	USD
CY2017	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	10934000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	4156000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	1725000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	462000	USD
CY2019	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	258000	USD
CY2018	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	298000	USD
CY2017	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	484000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	8157000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	6359000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	6077000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-1290000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-2950000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-1285000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	27759000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-97004000	USD
CY2017	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-17081000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-3415000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-17860000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-13978000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	38125000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	13989000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-2079000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	189350000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	398286000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	248046000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	300031000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	206880000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	144106000	USD
CY2019	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	157828000	USD
CY2018	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	123421000	USD
CY2017	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	149400000	USD
CY2019	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	23100000	USD
CY2018	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	6644000	USD
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2434000	USD
CY2019	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	40195000	USD
CY2018	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	47643000	USD
CY2017	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	32143000	USD
CY2019	njr	Paymentsto Acquire Businesses Energy Contract Fair Value PaymentstoAcquireBusinessesEnergyContractFairValue	0	USD
CY2018	njr	Paymentsto Acquire Businesses Energy Contract Fair Value PaymentstoAcquireBusinessesEnergyContractFairValue	0	USD
CY2017	njr	Paymentsto Acquire Businesses Energy Contract Fair Value PaymentstoAcquireBusinessesEnergyContractFairValue	-55661000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4102000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	16151000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	27070000	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	2428000	USD
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	3117000	USD
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	2749000	USD
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	10000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9443000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	205745000	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	27916000	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	34484000	USD
CY2018	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	6616000	USD
CY2017	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	6639000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-282599000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-373090000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-391983000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	467900000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	225000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	100000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	218638000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	165486000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	97854000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-126500000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-114050000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	144300000	USD
CY2019	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	0	USD
CY2018	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	71538000	USD
CY2017	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	32901000	USD
CY2019	us-gaap	Sale Leaseback Transaction Net Proceeds Financing Activities SaleLeasebackTransactionNetProceedsFinancingActivities	9895000	USD
CY2018	us-gaap	Sale Leaseback Transaction Net Proceeds Financing Activities SaleLeasebackTransactionNetProceedsFinancingActivities	7820000	USD
CY2017	us-gaap	Sale Leaseback Transaction Net Proceeds Financing Activities SaleLeasebackTransactionNetProceedsFinancingActivities	9587000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	104059000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	95835000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	87988000	USD
CY2019	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	57391000	USD
CY2018	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	41677000	USD
CY2017	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	16717000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17136000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17492000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6355000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-7104000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-13755000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-4788000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	95602000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-25955000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	107295000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2353000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-759000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-36642000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1710000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2469000	USD
CY2016Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39111000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4063000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1710000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2469000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-63795000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7524000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	56974000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-14265000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-15464000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3022000	USD
CY2019	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	15733000	USD
CY2018	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	-30439000	USD
CY2017	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	90000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	-74031000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	51187000	USD
CY2017	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	20663000	USD
CY2019	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	-360000	USD
CY2018	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	-1000	USD
CY2017	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	2000	USD
CY2019	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	2271000	USD
CY2018	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	1254000	USD
CY2017	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	10366000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2256000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	40422000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	13086000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-22004000	USD
CY2018	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-30974000	USD
CY2017	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	22570000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-209000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	368000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-5877000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	30559000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	21769000	USD
CY2019	us-gaap	Transfer To Investments TransferToInvestments	0	USD
CY2018	us-gaap	Transfer To Investments TransferToInvestments	14579000	USD
CY2017	us-gaap	Transfer To Investments TransferToInvestments	0	USD
CY2019Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	2625730000	USD
CY2018Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	2368914000	USD
CY2019Q3	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	232233000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1991000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3631000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-10313000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	27759000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-97004000	USD
CY2017	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-17081000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	50371000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	44821000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	44362000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12647000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5577000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-6877000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	30725000	USD
CY2018Q3	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	192481000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	861904000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	697406000	USD
CY2019Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	62492000	USD
CY2018Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	45690000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3782359000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3304491000	USD
CY2019Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	585160000	USD
CY2018Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	530753000	USD
CY2019Q3	njr	Accumulated Depreciation Depletionand Amortization Other Property Plantand Equipment AccumulatedDepreciationDepletionandAmortizationOtherPropertyPlantandEquipment	156033000	USD
CY2018Q3	njr	Accumulated Depreciation Depletionand Amortization Other Property Plantand Equipment AccumulatedDepreciationDepletionandAmortizationOtherPropertyPlantandEquipment	122689000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3041166000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2651049000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2676000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1458000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	139263000	USD
CY2018Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	205490000	USD
CY2019Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	6510000	USD
CY2018Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	7199000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6148000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5704000	USD
CY2019Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	32871000	USD
CY2018Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	18297000	USD
CY2019Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	169803000	USD
CY2018Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	184633000	USD
CY2019Q3	us-gaap	Other Inventory OtherInventory	14475000	USD
CY2018Q3	us-gaap	Other Inventory OtherInventory	13910000	USD
CY2019Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	496637000	USD
CY2018Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	32917000	USD
CY2019Q3	us-gaap	Prepaid Taxes PrepaidTaxes	22602000	USD
CY2018Q3	us-gaap	Prepaid Taxes PrepaidTaxes	23047000	USD
CY2019Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	25103000	USD
CY2018Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	27396000	USD
CY2019Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	73723000	USD
CY2018Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	53719000	USD
CY2019Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	0	USD
CY2018Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	206905000	USD
CY2019Q3	us-gaap	Other Assets Current OtherAssetsCurrent	30728000	USD
CY2018Q3	us-gaap	Other Assets Current OtherAssetsCurrent	33730000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	511606000	USD
CY2018Q3	us-gaap	Assets Current AssetsCurrent	770080000	USD
CY2019Q3	us-gaap	Equity Method Investments EquityMethodInvestments	200268000	USD
CY2018Q3	us-gaap	Equity Method Investments EquityMethodInvestments	190866000	USD
CY2018Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	368592000	USD
CY2019Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	7426000	USD
CY2018Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	10560000	USD
CY2019Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	0	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	14611000	USD
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	23375000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	101271000	USD
CY2018Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	96225000	USD
CY2019Q3	us-gaap	Assets Noncurrent AssetsNoncurrent	820213000	USD
CY2018Q3	us-gaap	Assets Noncurrent AssetsNoncurrent	722535000	USD
CY2019Q3	us-gaap	Assets Assets	4372985000	USD
CY2018Q3	us-gaap	Assets Assets	4143664000	USD
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	226649000	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	226196000	USD
CY2019Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	291331000	USD
CY2018Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	274748000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-31787000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12610000	USD
CY2019Q3	us-gaap	Treasury Stock Value TreasuryStockValue	10436000	USD
CY2018Q3	us-gaap	Treasury Stock Value TreasuryStockValue	76473000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1075960000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1007117000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1551717000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1418978000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1537177000	USD
CY2018Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1180619000	USD
CY2019Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3088894000	USD
CY2018Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	2599597000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	21419000	USD
CY2018Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	123545000	USD
CY2019Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	25450000	USD
CY2018Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	151950000	USD
CY2019Q3	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	137271000	USD
CY2018Q3	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	211303000	USD
CY2019Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	790000	USD
CY2018Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	1150000	USD
CY2019Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	129724000	USD
CY2018Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	135240000	USD
CY2019Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	28122000	USD
CY2018Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	25824000	USD
CY2019Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	3394000	USD
CY2018Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	1568000	USD
CY2019Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	0	USD
CY2018Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	8185000	USD
CY2019Q3	njr	Clean Energy Program Current CleanEnergyProgramCurrent	15468000	USD
CY2018Q3	njr	Clean Energy Program Current CleanEnergyProgramCurrent	14052000	USD
CY2019Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	57623000	USD
CY2018Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	46652000	USD
CY2019Q3	njr	Disposal Group Including Discontinued Operation Liabilities Held For Sale DisposalGroupIncludingDiscontinuedOperationLiabilitiesHeldForSale	0	USD
CY2018Q3	njr	Disposal Group Including Discontinued Operation Liabilities Held For Sale DisposalGroupIncludingDiscontinuedOperationLiabilitiesHeldForSale	4182000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27116000	USD
CY2018Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27325000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	446377000	USD
CY2018Q3	us-gaap	Liabilities Current LiabilitiesCurrent	750976000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	190663000	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	242436000	USD
CY2019Q3	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	3653000	USD
CY2018Q3	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	3976000	USD
CY2019Q3	njr	Deferred Gain Noncurrent DeferredGainNoncurrent	1554000	USD
CY2018Q3	njr	Deferred Gain Noncurrent DeferredGainNoncurrent	9104000	USD
CY2019Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	18821000	USD
CY2018Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	22982000	USD
CY2019Q3	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	131080000	USD
CY2018Q3	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	130800000	USD
CY2019Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	246517000	USD
CY2018Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	137007000	USD
CY2019Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	202435000	USD
CY2018Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	209139000	USD
CY2019Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	31046000	USD
CY2018Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	28688000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11945000	USD
CY2018Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	8959000	USD
CY2019Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	837714000	USD
CY2018Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	793091000	USD
CY2019Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4372985000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4143664000	USD
CY2016Q3	us-gaap	Stockholders Equity StockholdersEquity	1166591000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	132065000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11899000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	5694000	USD
CY2017	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	17622000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	89637000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	7591000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	1236643000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	233436000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6078000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	16572000	USD
CY2018	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	17094000	USD
CY2018	njr	Stock Issued During Period Value Dividend Reinvestment Plan Waiver Discount StockIssuedDuringPeriodValueDividendReinvestmentPlanWaiverDiscount	41677000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	97579000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	22787000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1418978000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169505000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-15731000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3787000	USD
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	16663000	USD
CY2019	njr	Stock Issued During Period Value Dividend Reinvestment Plan Waiver Discount StockIssuedDuringPeriodValueDividendReinvestmentPlanWaiverDiscount	57391000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	106342000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	-5232000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1551717000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">1. NATURE OF THE BUSINESS</span><span style="font-family:inherit;font-size:10pt;font-weight:bold;"> </span></div><div style="line-height:120%;text-align:justify;font-size:6pt;"><span style="font-family:inherit;font-size:6pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">New Jersey Resources Corporation provides regulated gas distribution services and operates certain unregulated businesses primarily through the following:</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">New Jersey Natural Gas Company provides natural gas utility service to approximately </span><span style="font-family:inherit;font-size:10pt;"><span>547,600</span></span><span style="font-family:inherit;font-size:10pt;"> retail customers in central and northern New Jersey and is subject to rate regulation by the BPU. NJNG comprises the Natural Gas Distribution segment.</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">NJR Clean Energy Ventures Corporation, the Company's clean energy subsidiary, comprises the Clean Energy Ventures segment and consists of the Company's capital investments in commercial and residential solar projects located throughout New Jersey. Clean Energy Ventures finalized the sale of its remaining wind assets on </span><span style="font-family:inherit;font-size:10pt;">February 7, 2019</span><span style="font-family:inherit;font-size:10pt;">; see </span><span style="font-family:inherit;font-size:10pt;font-style:italic;">Note 17. Acquisitions and Dispositions</span><span style="font-family:inherit;font-size:10pt;"> for more details.</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">NJR Energy Services Company </span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;">comprises</span><span style="font-family:inherit;font-size:10pt;"> the Energy Services segment. Energy Services maintains and transacts around a portfolio of natural gas storage and transportation capacity contracts and provides physical wholesale energy, retail energy and energy management services in the U.S. and Canada. From July 2017 through February 2018, N</span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;">JR Retail Services Company </span><span style="font-family:inherit;font-size:10pt;">provided retail natural gas supply and transportation services to commercial and industrial customers in Delaware, Maryland, Pennsylvania and New Jersey as part of the Energy Services segment. NJRRS was sold to an unrelated third party on </span><span style="font-family:inherit;font-size:10pt;">February 28, 2018</span><span style="font-family:inherit;font-size:10pt;">. See </span><span style="font-family:inherit;font-size:10pt;font-style:italic;">Note 17. Acquisitions and Dispositions</span><span style="font-family:inherit;font-size:10pt;"> for more details regarding the sale.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">NJR Midstream Holdings Corporation, which comprises the Midstream segment, invests in energy-related ventures through its subsidiaries: NJR Steckman Ridge Storage Company, which holds the Company's </span><span style="font-family:inherit;font-size:10pt;"><span>50 percent</span></span><span style="font-family:inherit;font-size:10pt;"> combined </span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;">ownership</span><span style="font-family:inherit;font-size:10pt;"> interest in Steckman Ridge, located in Pennsylvania; NJNR Pipeline; and </span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;">NJR Pipeline Company, which includes Adelphia Gateway, LLC and the Company's </span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;"><span>20 percent</span></span><span style="font-family:inherit;font-size:10pt;text-align:justify;vertical-align:bottom;"> ownership interest in PennEast</span><span style="font-family:inherit;font-size:10pt;">. See </span><span style="font-family:inherit;font-size:10pt;font-style:italic;">Note 7. Investments in Equity Investees</span><span style="font-family:inherit;font-size:10pt;font-style:italic;"> </span><span style="font-family:inherit;font-size:10pt;">for more information.</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">NJR Retail Holdings Corporation has </span><span style="font-family:inherit;font-size:10pt;"><span>two</span></span><span style="font-family:inherit;font-size:10pt;"> principal subsidiaries: NJR Home Services Company, which provides heating, central air conditioning, standby generators, solar and other indoor and outdoor comfort products to residential homes throughout New Jersey; and Commercial Realty & Resources Corporation, which owns commercial real estate. NJR Home Services Company and Commercial Realty & Resources Corporation are included in Home Services and Other operations.</span></div>
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires the Company to make estimates that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosure of contingencies during the reporting period. On a quarterly basis or more frequently whenever events or changes in circumstances indicate a need, the Company evaluates its estimates, including those related to the calculation of the fair value of derivative instruments, debt, equity method investments, unbilled revenues, allowance for doubtful accounts, provisions for depreciation and amortization, long-lived assets, regulatory assets and liabilities, income taxes, pensions and other postemployment benefits, contingencies related to environmental matters and litigation. ARO are evaluated as often as needed. The Company’s estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.</span></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company has legal, regulatory and environmental proceedings during the normal course of business that can result in loss contingencies. When evaluating the potential for a loss, the Company will establish a reserve if a loss is probable and can be reasonably estimated, in which case it is the Company’s policy to accrue the full amount of such estimates. Where the information is sufficient only to establish a range of probable liability, and no point within the range is more likely than any other, it is the Company’s policy to accrue the lower end of the range. In the normal course of business, estimated amounts are subsequently adjusted to actual results that may differ from estimates.</span></div>
CY2019	njr	Demand Fees DemandFees	239500000	USD
CY2018	njr	Demand Fees DemandFees	245500000	USD
CY2017	njr	Demand Fees DemandFees	206600000	USD
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0225
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0229
CY2017	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0225
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91700000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85700000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81800000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3782359000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3304491000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	741193000	USD
CY2018Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	653442000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3041166000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2651049000	USD
CY2019	njr	Sbc Interest Rate SBCInterestRate	0.0330
CY2018	njr	Sbc Interest Rate SBCInterestRate	0.0341
CY2017	njr	Sbc Interest Rate SBCInterestRate	0.0255
CY2019	njr	Deferred Interest DeferredInterest	760000	USD
CY2018	njr	Deferred Interest DeferredInterest	411000	USD
CY2017	njr	Deferred Interest DeferredInterest	78000	USD
CY2019Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1400000	USD
CY2018Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	252000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	12400000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	10400000	USD
CY2019Q3	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	38800000	USD
CY2018Q3	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	39500000	USD
CY2019Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	169803000	USD
CY2019Q3	njr	Energy Related Inventory Natural Gasin Storage Bcf EnergyRelatedInventoryNaturalGasinStorageBCF	52.6	Bcf
CY2018Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	184633000	USD
CY2018Q3	njr	Energy Related Inventory Natural Gasin Storage Bcf EnergyRelatedInventoryNaturalGasinStorageBCF	59.0	Bcf
CY2018Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	32900000	USD
CY2019Q1	us-gaap	Debt Instrument Convertible Conversion Ratio1 DebtInstrumentConvertibleConversionRatio1	0.2492
CY2019Q1	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	34500000	USD
CY2019Q1	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	1600000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	14600000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	5011000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	4691000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	2561000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	2271000	USD
CY2019Q3	njr	Finite Lived Intangible Assets Amortization Expense Year Five And Thereafter FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndThereafter	77000	USD
CY2019	njr	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	2	plan
CY2019	njr	Defined Benefit Plan Numberof Medicaland Life Insurance Plans DefinedBenefitPlanNumberofMedicalandLifeInsurancePlans	2	plan
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;text-align:left;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassification</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Certain prior period amounts related to restricted cash on the Consolidated Statements of Cash Flows and compensation costs on the Consolidated Statements of Operations have been reclassified to conform to the current period presentation due to the ASU adoptions listed below.</span></div>
CY2019	njr	Sales Tax SalesTax	45300000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2676000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1458000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2226000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	37546000	USD
CY2019Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	1387000	USD
CY2018Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	252000	USD
CY2017Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	243000	USD
CY2016Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	1565000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4063000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1710000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2469000	USD
CY2016Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39111000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	782331000	USD
CY2019	njr	Alternative Revenue Programs Revenue AlternativeRevenueProgramsRevenue	10364000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1807588000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1809714000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1809714000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2018Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	205490000	USD
CY2018Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	7199000	USD
CY2018Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27325000	USD
CY2019	njr	Contractwith Customer Increase Decreasefor Accounts Receivable ContractwithCustomerIncreaseDecreaseforAccountsReceivable	-66227000	USD
CY2019	njr	Contractwith Customer Increase Decreasefor Unbilled Receivable ContractwithCustomerIncreaseDecreaseforUnbilledReceivable	-689000	USD
CY2019	njr	Contractwith Customer Increase Decreasefor Contract Liability ContractwithCustomerIncreaseDecreaseforContractLiability	-209000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	139263000	USD
CY2019Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	6510000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27116000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	139263000	USD
CY2019Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	6510000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27116000	USD
CY2019Q3	njr	Contractwith Customer Assets Liabilities Net ContractwithCustomerAssetsLiabilitiesNet	118657000	USD
CY2019	us-gaap	Public Utilities Approved Equity Capital Structure Percentage PublicUtilitiesApprovedEquityCapitalStructurePercentage	0.069
CY2019	us-gaap	Public Utilities Approved Return On Equity Percentage PublicUtilitiesApprovedReturnOnEquityPercentage	0.0975
CY2019Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	32871000	USD
CY2018Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	18297000	USD
CY2019Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	496637000	USD
CY2018Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	368592000	USD
CY2019Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	0	USD
CY2018Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	8185000	USD
CY2019Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	202435000	USD
CY2018Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	209139000	USD
CY2019	njr	Public Utilities Numberof Interim Filings During Each Fiscal Year PublicUtilitiesNumberofInterimFilingsDuringEachFiscalYear	2	filings
CY2019	njr	Public Utilities Numberof Days Noticefor Refund PublicUtilitiesNumberofDaysNoticeforRefund	P5D
CY2018	njr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	228400000	USD
CY2018	njr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Income Taxes TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredIncomeTaxes	164300000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit	64100000	USD
CY2019Q3	njr	Regulatory Liability Excess Deferred Income Taxes RegulatoryLiabilityExcessDeferredIncomeTaxes	200400000	USD
CY2019	us-gaap	Concentration Risk Credit Risk Financial Instrument Maximum Exposure ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure	217199000	USD
CY2019Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	186000	USD
CY2018Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	124000	USD
CY2019Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	0	USD
CY2018Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	33000	USD
CY2019Q3	us-gaap	Equity Method Investments EquityMethodInvestments	200268000	USD
CY2018Q3	us-gaap	Equity Method Investments EquityMethodInvestments	190866000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169505000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	233436000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	132065000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89242000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	87689000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86321000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.66
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.53
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89242000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	87689000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86321000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	374000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	626000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	823000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89616000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88315000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	87144000	shares
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.89
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.64
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1537177000	USD
CY2018Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1180619000	USD
CY2019Q3	njr	Njbpu Dividend Restriction Equityto Capitalization Ratio NJBPUDividendRestrictionEquitytoCapitalizationRatio	0.30
CY2019Q3	us-gaap	Ratio Of Indebtedness To Net Capital1 RatioOfIndebtednessToNetCapital1	0.563
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	3291481	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9796000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12845000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5807000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2848000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3734000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2372000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	6948000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	9111000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	3435000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-1300000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-3000000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-1300000	USD
CY2019	njr	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	2	plan
CY2019	njr	Defined Benefit Plan Required Lengthof Service DefinedBenefitPlanRequiredLengthofService	P1Y
CY2019	njr	Defined Benefit Plan Benefits Basis Period DefinedBenefitPlanBenefitsBasisPeriod	P60M
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts Year Four1 PrescriptionDrugSubsidyReceiptsYearFour1	350000	USD
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts Year Five1 PrescriptionDrugSubsidyReceiptsYearFive1	387000	USD
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts After Year Five PrescriptionDrugSubsidyReceiptsAfterYearFive	2605000	USD
CY2019	njr	Defined Benefit Plan Desired Rate Of Return Before Permissible Expense After Inflation DefinedBenefitPlanDesiredRateOfReturnBeforePermissibleExpenseAfterInflation	0.05
CY2019Q3	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2019Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2018Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts Next Twelve Months PrescriptionDrugSubsidyReceiptsNextTwelveMonths	261000	USD
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts Year Two1 PrescriptionDrugSubsidyReceiptsYearTwo1	286000	USD
CY2019Q3	us-gaap	Prescription Drug Subsidy Receipts Year Three1 PrescriptionDrugSubsidyReceiptsYearThree1	314000	USD
CY2019	njr	Defined Contribution Plan Company Match Of Employee Contribution DefinedContributionPlanCompanyMatchOfEmployeeContribution	0.75
CY2019	njr	Defined Contribution Plan Maximum Employer Contribution By Percentage Of Employee Salary DefinedContributionPlanMaximumEmployerContributionByPercentageOfEmployeeSalary	0.06
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3900000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3900000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2900000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-40785000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	54965000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1300000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	959000	USD
CY2017	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	781000	USD
CY2019	njr	Future Accretion Year One FutureAccretionYearOne	1669000	USD
CY2019	njr	Future Accretion Year Two FutureAccretionYearTwo	1745000	USD
CY2019	njr	Future Accretion Year Three FutureAccretionYearThree	1823000	USD
CY2019	njr	Future Accretion Year Four FutureAccretionYearFour	1908000	USD
CY2019	njr	Future Accretion Year Five FutureAccretionYearFive	1994000	USD
CY2019	njr	Future Accretion FutureAccretion	9139000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10933000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2848000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-16023000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3530000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4563000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2470000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7988000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	5833000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6731000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11457000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	66035000	USD
CY2019Q3	njr	Deferred Tax Assets Conservation Incentive Plan DeferredTaxAssetsConservationIncentivePlan	0	USD
CY2018Q3	njr	Deferred Tax Assets Conservation Incentive Plan DeferredTaxAssetsConservationIncentivePlan	1955000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3105000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	8213000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	239820000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	21446000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	34526000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37751000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-53785000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18343000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	156153000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	123258000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	24173000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	209474000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	379673000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	392886000	USD
CY2019Q3	njr	Deferred Tax Liabilities Remediation Costs DeferredTaxLiabilitiesRemediationCosts	10720000	USD
CY2018Q3	njr	Deferred Tax Liabilities Remediation Costs DeferredTaxLiabilitiesRemediationCosts	9229000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	24500000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	25302000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	34754000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	9673000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	8411000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	9192000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	0	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7231000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4646000	USD
CY2019Q3	njr	Deferred Tax Assets Amortizationof Intangibles DeferredTaxAssetsAmortizationofIntangibles	4991000	USD
CY2018Q3	njr	Deferred Tax Assets Amortizationof Intangibles DeferredTaxAssetsAmortizationofIntangibles	3737000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	21730000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	31956000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	2657000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	1156000	USD
CY2019Q3	njr	Deferred Tax Liabilities Conservation Incentive Plan DeferredTaxLiabilitiesConservationIncentivePlan	942000	USD
CY2018Q3	njr	Deferred Tax Liabilities Conservation Incentive Plan DeferredTaxLiabilitiesConservationIncentivePlan	0	USD
CY2019Q3	njr	Deferredtaxliabilities Tax Deferred Expense Post Employment Benefits DeferredtaxliabilitiesTaxDeferredExpensePostEmploymentBenefits	0	USD
CY2018Q3	njr	Deferredtaxliabilities Tax Deferred Expense Post Employment Benefits DeferredtaxliabilitiesTaxDeferredExpensePostEmploymentBenefits	353000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4776000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	7826000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	420498000	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	443406000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	180678000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	233932000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27668000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	44014000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	52643000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	66035000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	21446000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	34526000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-6349000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-5829000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-6886000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	2313000	USD
CY2018	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	2117000	USD
CY2017	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	2624000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7707000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7092000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8222000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Basis Adjustment EffectiveIncomeTaxRateReconciliationBasisAdjustment	6500000	USD
CY2018	njr	Effective Income Tax Rate Reconciliation Basis Adjustment EffectiveIncomeTaxRateReconciliationBasisAdjustment	1080000	USD
CY2017	njr	Effective Income Tax Rate Reconciliation Basis Adjustment EffectiveIncomeTaxRateReconciliationBasisAdjustment	4256000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	-3573000	USD
CY2018	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	-1786000	USD
CY2017	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	0	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Tax Act Nonutility Excess Deferred Income Taxes EffectiveIncomeTaxRateReconciliationTaxActNonutilityExcessDeferredIncomeTaxes	0	USD
CY2018	njr	Effective Income Tax Rate Reconciliation Tax Act Nonutility Excess Deferred Income Taxes EffectiveIncomeTaxRateReconciliationTaxActNonutilityExcessDeferredIncomeTaxes	-59627000	USD
CY2017	njr	Effective Income Tax Rate Reconciliation Tax Act Nonutility Excess Deferred Income Taxes EffectiveIncomeTaxRateReconciliationTaxActNonutilityExcessDeferredIncomeTaxes	0	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Relatedto Customer Refunds EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesRelatedtoCustomerRefunds	0	USD
CY2018	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Relatedto Customer Refunds EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesRelatedtoCustomerRefunds	-14323000	USD
CY2017	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Relatedto Customer Refunds EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesRelatedtoCustomerRefunds	0	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1356000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-843000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2742000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37751000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-53785000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18343000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.287
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.299
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.122
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019Q2	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.30
CY2019Q2	njr	Income Tax Expense Benefit Solar Investment Tax Credit Netof Deferred Taxes IncomeTaxExpenseBenefitSolarInvestmentTaxCreditNetofDeferredTaxes	-10000000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4930000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4930000	USD
CY2019Q3	njr	Deferred Tax Assets Operating Loss Carryforwards Domestic Refundableand Receivables DeferredTaxAssetsOperatingLossCarryforwardsDomesticRefundableandReceivables	22800000	USD
CY2018Q3	njr	Deferred Tax Assets Operating Loss Carryforwards Domestic Refundableand Receivables DeferredTaxAssetsOperatingLossCarryforwardsDomesticRefundableandReceivables	23000000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	24200000	USD
CY2019Q3	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	4000000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	59600000	USD
CY2018	njr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	228400000	USD
CY2018	njr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Income Taxes TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredIncomeTaxes	164300000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit	64100000	USD
CY2018Q2	njr	Tax Cuts And Jobs Acts Of2017 Incomplete Accounting Initial Revaluation Of Excess Deferred Income Taxes TaxCutsAndJobsActsOf2017IncompleteAccountingInitialRevaluationOfExcessDeferredIncomeTaxes	20100000	USD
CY2018Q2	njr	Tax Cuts And Jobs Acts Of2017 Overcollectionof Taxes TaxCutsAndJobsActsOf2017OvercollectionofTaxes	9000000	USD
CY2018	njr	Deferred Income Tax Expense Benefit Remeasurement DeferredIncomeTaxExpenseBenefitRemeasurement	14300000	USD
CY2018	njr	Amortization Of Excess Deferred Income Taxes AmortizationOfExcessDeferredIncomeTaxes	1800000	USD
CY2018	njr	Revaluation Of Deferred Income Taxes Not Included In Base Rates RevaluationOfDeferredIncomeTaxesNotIncludedInBaseRates	880000	USD
CY2019Q3	njr	Regulatory Liability Excess Deferred Income Taxes RegulatoryLiabilityExcessDeferredIncomeTaxes	200400000	USD
CY2019	njr	Current Charges Recoverable Through Bgss CurrentChargesRecoverableThroughBgss	129300000	USD
CY2019Q3	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	521040000	USD
CY2019Q3	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	263069000	USD
CY2019Q3	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	205671000	USD
CY2019Q3	us-gaap	Purchase Obligation Due In Fourth Year PurchaseObligationDueInFourthYear	166384000	USD
CY2019Q3	us-gaap	Purchase Obligation Due In Fifth Year PurchaseObligationDueInFifthYear	116702000	USD
CY2019Q3	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	603502000	USD
CY2019Q3	njr	Lessee Operating Lease Liability Payments Due Next Five Years LesseeOperatingLeaseLiabilityPaymentsDueNextFiveYears	4700000	USD
CY2017	us-gaap	Interest Expense InterestExpense	44886000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37751000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	2034000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	54400000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2018	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2915109000	USD
CY2017	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2268617000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	91730000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85701000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81841000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	1623000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	614000	USD
CY2019	us-gaap	Interest Expense InterestExpense	47082000	USD
CY2018	us-gaap	Interest Expense InterestExpense	46286000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-53785000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18343000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13628000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13008000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13813000	USD
CY2019	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	174960000	USD
CY2018	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	240486000	USD
CY2017	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	149392000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	521154000	USD
CY2018	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	384588000	USD
CY2017	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	328083000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	4102000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	16151000	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	27070000	USD
CY2019	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	174960000	USD
CY2018	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	240486000	USD
CY2017	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	149392000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-2881000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-26770000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	11241000	USD
CY2019	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	-711000	USD
CY2018	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	-4512000	USD
CY2017	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	4062000	USD
CY2019	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	-4309000	USD
CY2018	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	22570000	USD
CY2017	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	-38470000	USD
CY2019	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	-1024000	USD
CY2018	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	7362000	USD
CY2017	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	-13964000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169505000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	233436000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	132065000	USD
CY2019Q3	us-gaap	Assets Assets	4372985000	USD
CY2018Q3	us-gaap	Assets Assets	4143664000	USD
CY2017Q3	us-gaap	Assets Assets	3928507000	USD
CY2019	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	7948000	USD
CY2018	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	8505000	USD
CY2017	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	8340000	USD
CY2019Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	790000	USD
CY2018Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	1150000	USD
CY2019	njr	Numberof Asset Management Agreement NumberofAssetManagementAgreement	4	contract
CY2018Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	811767000	USD
CY2019Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	866255000	USD
CY2019Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	434942000	USD
CY2019Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	479081000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	88743000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	77001000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-4019000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-7790000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	86248000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	73573000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-8402000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	18086000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.97
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.97
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2017Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	705305000	USD
CY2018Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1019043000	USD
CY2018Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	543435000	USD
CY2018Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	647326000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	76196000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	178744000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-36715000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-18343000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	123699000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	140266000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-14274000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-16255000	USD
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.60
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.16
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.18
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.59
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.16
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.18

Files In Submission

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$NJR
NEW JERSEY RESOURCES CORP Stock $njr

2019 Q3 Form 10-K Financial Statement

#000035630919000133 Filed on November 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NJR NEW JERSEY RESOURCES CORP Stock $njr

2019 Q3 Form 10-K Financial Statement

#000035630919000133 Filed on November 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NJR
NEW JERSEY RESOURCES CORP Stock $njr