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LEASES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 31, 2021
Lessee, Lease, Description [Line Items] |  |  |  |
ROU asset obtained in exchange for operating lease liability | $ 911 | $ 46,100 |  |
Proceeds from sale leaseback transaction | 17,300 | 0 | $ 4,000 |
ROU asset obtained in exchange for finance lease liability | $ 17,300 | $ 0 |  |
Weighted average remaining lease term, operating lease | 29 years 2 months 12 days | 29 years 7 months 6 days |  |
Operating lease, discount rate | 3.20% | 3.20% |  |
Weighted average remaining lease term, finance lease | 4 years | 3 years 4 months 24 days |  |
Finance lease, discount rate | 2.70% | 3.50% |  |
NJNG |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Proceeds from sale leaseback transaction | $ 17,300 | $ 0 | $ 4,000 |
Solar Property | Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 20 years |  |  |
Renewal term | 5 years |  |  |
Solar Property | Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 50 years |  |  |
Renewal term | 20 years |  |  |
Office Building |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract |  |  |  | 16 years
Office Building | Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 2 years |  |  |
Office Building | Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 17 years |  |  |
Meter License | Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 7 years |  |  |
Meter License | Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 10 years |  |  |
Equipment |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 7 years |  |  |
Storage and Capacity |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Term of contract | 50 years |  |  |

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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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