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REGULATION - REGULATORY ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | $ 95,747 | $ 40,086
Regulatory assets-noncurrent | 528,114 | 500,666
Total current regulatory liabilities | 27,701 | 31,090
Regulatory liabilities-noncurrent | 181,814 | 185,634
Expended, net of recoveries |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 63,800 |
NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 95,747 | 40,086
Regulatory assets-noncurrent | 522,858 | 495,300
Total current regulatory liabilities | 26,774 | 25,779
Regulatory liabilities-noncurrent | 181,814 | 185,634
NJNG | Overrecovered natural gas costs |  |
Regulatory Assets And Liabilities [Line Items] |  |
Total current regulatory liabilities | 26,717 | 17,807
NJNG | Derivatives at fair value, net |  |
Regulatory Assets And Liabilities [Line Items] |  |
Total current regulatory liabilities | 57 | 7,972
Regulatory liabilities-noncurrent | 91 | 116
NJNG | Tax Act impact |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory liabilities-noncurrent | 181,602 | 185,367
NJNG | Other noncurrent regulatory liabilities |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory liabilities-noncurrent | 121 | 151
NJNG | New Jersey Clean Energy Program |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 17,943 | 15,697
NJNG | Conservation Incentive Program |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 52,115 | 23,099
NJNG | Derivatives at fair value, net |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 24,228 | 0
NJNG | Other current regulatory assets |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 1,461 | 1,290
Regulatory assets-noncurrent | 43,987 | 45,828
NJNG | Expended, net of recoveries |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 63,841 | 66,149
NJNG | Liability for future expenditures |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 123,070 | 127,070
NJNG | Deferred income taxes |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 41,885 | 40,520
NJNG | SAVEGREEN |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 72,507 | 52,690
NJNG | Postemployment and other benefit costs |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 55,878 | 56,021
NJNG | Deferred storm damage costs |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 543 | 2,172
NJNG | Cost of removal |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 121,147 | 104,850
Adelphia |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 5,256 | 5,366
Total current regulatory liabilities | $ 927 | $ 5,311

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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