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REGULATION (Tables) | 6 Months Ended
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Mar. 31, 2017
Regulated Operations [Abstract] |
Schedule of Regulatory Assets and Liabilities | Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets are comprised of the following:
(Thousands) | March 31, 2017 | September 30, 2016
Regulatory assets-current |  |
Conservation Incentive Program | $ | 23,834 |  | $ | 36,957 |
New Jersey Clean Energy Program | 6,239 |  | 14,232 |
Underrecovered gas costs | 13,271 |  | — |
Derivatives at fair value, net | — |  | 3,097 |
Total current regulatory assets | $ | 43,344 |  | $ | 54,286 |
Regulatory assets-noncurrent |  |
Environmental remediation costs |  |
Expended, net of recoveries | $ | 19,067 |  | $ | 19,595 |
Liability for future expenditures | 165,849 |  | 172,000 |
Deferred income taxes | 21,209 |  | 20,273 |
Derivatives at fair value, net | 4,392 |  | 23,384 |
SAVEGREEN | 15,604 |  | 25,208 |
Postemployment and other benefit costs | 151,414 |  | 157,027 |
Deferred Superstorm Sandy costs | 14,116 |  | 15,201 |
Other noncurrent regulatory assets | 5,273 |  | 8,606 |
Total noncurrent regulatory assets | $ | 396,924 |  | $ | 441,294 |
Regulatory liability-current |  |
Derivatives at fair value, net | $ | 5,747 |  | $ | — |
Overrecovered gas costs | — |  | 9,469 |
Total current regulatory liabilities | $ | 5,747 |  | $ | 9,469 |
Regulatory liabilities-noncurrent |  |
Cost of removal obligation | $ | 17,224 |  | $ | 30,549 |
New Jersey Clean Energy Program | 10,269 |  | 10,657 |
Other noncurrent regulatory liabilities | 964 |  | 205 |
Total noncurrent regulatory liabilities | $ | 28,457 |  | $ | 41,411 |

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- Definition The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit. + References No definition available. + Details
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