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DERIVATIVE INSTRUMENTS - BALANCE SHEET RELATED DISCLOSURES (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Sep. 30, 2023
--- | --- | ---
Fair Value |  |
Derivative assets, current | $ 14,056 | $ 30,755
Derivative liability, current | 10,725 | 16,145
Derivative assets, noncurrent | 910 | 1,564
Derivative liabilities, noncurrent | 13,791 | 7,967
Not Designated as Hedging Instrument |  |
Fair Value |  |
Derivative assets | 14,966 | 32,319
Derivative liabilities | 24,516 | 24,112
NJNG | Not Designated as Hedging Instrument | Physical commodity contracts |  |
Fair Value |  |
Derivative assets, current | 49 | 43
Derivative liability, current | 6 | 488
NJNG | Not Designated as Hedging Instrument | Financial commodity contracts |  |
Fair Value |  |
Derivative assets, current | 1,229 | 6,110
Derivative liability, current | 35 | 20
ES | Not Designated as Hedging Instrument | Physical commodity contracts |  |
Fair Value |  |
Derivative assets, current | 1,384 | 6,209
Derivative liability, current | 6,656 | 12,757
Derivative assets, noncurrent | 678 | 802
Derivative liabilities, noncurrent | 13,014 | 7,870
ES | Not Designated as Hedging Instrument | Financial commodity contracts |  |
Fair Value |  |
Derivative assets, current | 11,394 | 18,393
Derivative liability, current | 4,028 | 2,880
Derivative assets, noncurrent | 232 | 762
Derivative liabilities, noncurrent | $ 777 | $ 97

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