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REGULATION (Tables) | 3 Months Ended
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Dec. 31, 2018
Regulated Operations [Abstract] |
Schedule of Regulator Liabilities | Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets are comprised of the following:
(Thousands) | December 31, 2018 | September 30, 2018
Regulatory assets-current |  |
New Jersey Clean Energy Program | $ | 12,359 |  | $ | 14,052 |
Underrecovered gas costs | 6,149 |  | 4,137 |
Derivatives at fair value, net | 1 |  | 108 |
Total current regulatory assets | $ | 18,509 |  | $ | 18,297 |
Regulatory assets-noncurrent |  |
Environmental remediation costs |  |
Expended, net of recoveries | $ | 32,764 |  | $ | 33,017 |
Liability for future expenditures | 129,556 |  | 130,800 |
Deferred income taxes | 17,842 |  | 17,225 |
SAVEGREEN | 5,888 |  | 8,636 |
Postemployment and other benefit costs | 138,027 |  | 136,716 |
Deferred storm damage costs | 10,315 |  | 10,858 |
Cost of removal | 26,587 |  | 22,339 |
Other noncurrent regulatory assets | 9,045 |  | 9,001 |
Total noncurrent regulatory assets | $ | 370,024 |  | $ | 368,592 |
Regulatory liabilities-current |  |
Conservation Incentive Program | $ | 7,861 |  | $ | 6,994 |
Derivatives at fair value, net | 4,961 |  | 1,191 |
Total current regulatory liabilities | $ | 12,822 |  | $ | 8,185 |
Regulatory liabilities-noncurrent |  |
Tax Act impact (1) | $ | 204,161 |  | $ | 205,410 |
New Jersey Clean Energy Program | 4,722 |  | 1,902 |
Other noncurrent regulatory liabilities | 1,697 |  | 1,827 |
Total noncurrent regulatory liabilities | $ | 210,580 |  | $ | 209,139 |
(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.
Schedule of Regulatory Assets | Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets are comprised of the following:
(Thousands) | December 31, 2018 | September 30, 2018
Regulatory assets-current |  |
New Jersey Clean Energy Program | $ | 12,359 |  | $ | 14,052 |
Underrecovered gas costs | 6,149 |  | 4,137 |
Derivatives at fair value, net | 1 |  | 108 |
Total current regulatory assets | $ | 18,509 |  | $ | 18,297 |
Regulatory assets-noncurrent |  |
Environmental remediation costs |  |
Expended, net of recoveries | $ | 32,764 |  | $ | 33,017 |
Liability for future expenditures | 129,556 |  | 130,800 |
Deferred income taxes | 17,842 |  | 17,225 |
SAVEGREEN | 5,888 |  | 8,636 |
Postemployment and other benefit costs | 138,027 |  | 136,716 |
Deferred storm damage costs | 10,315 |  | 10,858 |
Cost of removal | 26,587 |  | 22,339 |
Other noncurrent regulatory assets | 9,045 |  | 9,001 |
Total noncurrent regulatory assets | $ | 370,024 |  | $ | 368,592 |
Regulatory liabilities-current |  |
Conservation Incentive Program | $ | 7,861 |  | $ | 6,994 |
Derivatives at fair value, net | 4,961 |  | 1,191 |
Total current regulatory liabilities | $ | 12,822 |  | $ | 8,185 |
Regulatory liabilities-noncurrent |  |
Tax Act impact (1) | $ | 204,161 |  | $ | 205,410 |
New Jersey Clean Energy Program | 4,722 |  | 1,902 |
Other noncurrent regulatory liabilities | 1,697 |  | 1,827 |
Total noncurrent regulatory liabilities | $ | 210,580 |  | $ | 209,139 |
(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.

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- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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