FAIR VALUE - ADDITIONAL INFORMATION (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
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| NJNG | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Finance leases | $ 41,200 | $ 33,500 |
| Level 2 | NJNG | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Finance leases | 40,400 | 32,500 |
| Fair market value | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt, fair value | 2,585,645 | 2,631,512 |
| Solar Asset Financing | CEV | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt, fair value | 538,000 | 471,500 |
| Solar Asset Financing | Fair market value | CEV | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt, fair value | $ 538,800 | $ 481,400 |
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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