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REGULATION (Tables)
 12 Months Ended
Sep. 30, 2022
Regulated Operations [Abstract]  
Schedule of Regulatory Assets
Regulatory assets and liabilities included on the Consolidated Balance Sheets for NJNG are comprised of the following, as of September 30:
(Thousands)20222021
Regulatory assets-current
New Jersey Clean Energy Program$15,697 $16,308 
Conservation Incentive Program23,099 11,839 
Other current regulatory assets1,290 1,554 
Total current regulatory assets$40,086 $29,701 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$66,149 $58,483 
Liability for future expenditures127,070 135,012 
Deferred income taxes40,520 39,694 
SAVEGREEN52,690 32,941 
Postemployment and other benefit costs56,021 117,194 
Deferred storm damage costs2,172 4,343 
Cost of removal104,850 99,238 
Other noncurrent regulatory assets45,828 32,695 
Total noncurrent regulatory assets$495,300 $519,600 
Regulatory liability-current
Overrecovered natural gas costs$17,807 $5,510 
Derivatives at fair value, net7,972 22,497 
Total current regulatory liabilities$25,779 $28,007 
Regulatory liabilities-noncurrent
Tax Act impact (1)
$185,367 $190,386 
Derivatives at fair value, net116 1,166 
Other noncurrent regulatory liabilities151 336 
Total noncurrent regulatory liabilities$185,634 $191,888 
(1)Reflects the re-measurement and subsequent amortization of NJNG’s net deferred tax liabilities as a result of the change in federal tax rates enacted in the Tax Act.

Regulatory assets and liabilities included on the Consolidated Balance Sheets for Adelphia Gateway are comprised of the following, as of September 30:
(Thousands)20222021
Total current regulatory assets$— $417 
Total noncurrent regulatory assets$5,366 $2,499 
Total current regulatory liabilities5,311 — 
Total noncurrent regulatory liabilities$— $1,163 
Schedule of Regulatory Liabilities
Regulatory assets and liabilities included on the Consolidated Balance Sheets for NJNG are comprised of the following, as of September 30:
(Thousands)20222021
Regulatory assets-current
New Jersey Clean Energy Program$15,697 $16,308 
Conservation Incentive Program23,099 11,839 
Other current regulatory assets1,290 1,554 
Total current regulatory assets$40,086 $29,701 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$66,149 $58,483 
Liability for future expenditures127,070 135,012 
Deferred income taxes40,520 39,694 
SAVEGREEN52,690 32,941 
Postemployment and other benefit costs56,021 117,194 
Deferred storm damage costs2,172 4,343 
Cost of removal104,850 99,238 
Other noncurrent regulatory assets45,828 32,695 
Total noncurrent regulatory assets$495,300 $519,600 
Regulatory liability-current
Overrecovered natural gas costs$17,807 $5,510 
Derivatives at fair value, net7,972 22,497 
Total current regulatory liabilities$25,779 $28,007 
Regulatory liabilities-noncurrent
Tax Act impact (1)
$185,367 $190,386 
Derivatives at fair value, net116 1,166 
Other noncurrent regulatory liabilities151 336 
Total noncurrent regulatory liabilities$185,634 $191,888 
(1)Reflects the re-measurement and subsequent amortization of NJNG’s net deferred tax liabilities as a result of the change in federal tax rates enacted in the Tax Act.

Regulatory assets and liabilities included on the Consolidated Balance Sheets for Adelphia Gateway are comprised of the following, as of September 30:
(Thousands)20222021
Total current regulatory assets$— $417 
Total noncurrent regulatory assets$5,366 $2,499 
Total current regulatory liabilities5,311 — 
Total noncurrent regulatory liabilities$— $1,163