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REGULATION - REGULATORY ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Sep. 30, 2021
--- | --- | ---
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | $ 38,653 | $ 30,118
Overrecovered natural gas costs | 18,999 | 28,007
Regulatory liabilities-noncurrent | 190,714 | 193,051
NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 38,280 | 29,701
Regulatory assets-noncurrent | 524,658 | 519,600
Overrecovered natural gas costs | 18,999 | 28,007
Regulatory liabilities-noncurrent | 189,819 | 191,888
Adelphia |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 373 | 417
Regulatory assets-noncurrent | 3,416 | 2,499
Regulatory liabilities-noncurrent | 895 | 1,163
Total current regulatory liabilities | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Overrecovered natural gas costs | 11,659 | 5,510
Derivatives at fair value, net | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Overrecovered natural gas costs | 7,340 | 22,497
Regulatory liabilities-noncurrent | 0 | 1,166
Tax Act impact | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory liabilities-noncurrent | 189,131 | 190,386
Other noncurrent regulatory liabilities | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory liabilities-noncurrent | 688 | 336
New Jersey Clean Energy Program | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 14,416 | 16,308
Conservation Incentive Program | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 22,493 | 11,839
Other current regulatory assets | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-current | 1,371 | 1,554
Regulatory assets-noncurrent | 38,685 | 32,695
Expended, net of recoveries | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 64,662 | 58,483
Liability for future expenditures | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 126,881 | 135,012
Deferred income taxes | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 39,613 | 39,694
SAVEGREEN | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 37,342 | 32,941
Postemployment and other benefit costs | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 114,515 | 117,194
Deferred storm damage costs | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | 3,800 | 4,343
Cost of removal | NJNG |  |
Regulatory Assets And Liabilities [Line Items] |  |
Regulatory assets-noncurrent | $ 99,160 | $ 99,238

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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