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DEBT - LONG TERM DEBT (Details) $ in Thousands |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | ---
Apr. 18, 2019 USD ($) First_mortgage_bond | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from sale-leaseback transaction |  |  |  | $ 9,895 | $ 7,820
Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of first mortgage bonds | First_mortgage_bond | 3 |  |  |  |
Proceeds from reissuance of first mortgage bond | $ 35,800 |  |  |  |
First Mortgage Bond | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted average interest rate | 3.02% |  |  |  |
NJNG |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from sale-leaseback transaction |  | $ 9,900 | $ 7,800 |  |
Remaining principal payments |  |  |  | $ 1,100 | $ 1,100

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow after closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51831-112757 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51840-112757 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51843-112757 + Details
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- Definition Other amounts the seller-lessee is required to pay under the terms of the transaction involving the sale of property to another party and lease of the property back to the seller, including reimbursements for such items, as utilities, taxes, insurance and common area maintenance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77913982&loc=d3e50796-112755 + Details
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