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DERIVATIVE INSTRUMENTS - BALANCE SHEET RELATED DISCLOSURES (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Sep. 30, 2020
--- | --- | ---
Fair Value |  |
Derivative assets, current | $ 17,433 | $ 23,310
Derivative liabilities, current | 23,690 | 33,865
Derivative assets, noncurrent | 1,977 | 3,349
Derivative liabilities, noncurrent | 20,506 | 13,352
Not Designated as Hedging Instrument |  |
Fair Value |  |
Derivative assets | 19,410 | 26,659
Derivative liabilities | 44,196 | 47,217
Natural Gas Distribution | Not Designated as Hedging Instrument | Physical commodity contracts |  |
Fair Value |  |
Derivative assets, current | 177 | 78
Derivative liabilities, current | 1 | 76
Natural Gas Distribution | Not Designated as Hedging Instrument | Financial commodity contracts |  |
Fair Value |  |
Derivative assets, current | 589 | 71
Derivative liabilities, current | 88 | 282
Energy Services | Not Designated as Hedging Instrument | Physical commodity contracts |  |
Fair Value |  |
Derivative assets, current | 3,668 | 6,454
Derivative liabilities, current | 16,415 | 20,438
Derivative assets, noncurrent | 1,364 | 1,264
Derivative liabilities, noncurrent | 20,090 | 12,003
Energy Services | Not Designated as Hedging Instrument | Financial commodity contracts |  |
Fair Value |  |
Derivative assets, current | 12,770 | 16,671
Derivative liabilities, current | 7,166 | 12,965
Derivative assets, noncurrent | 585 | 2,037
Derivative liabilities, noncurrent | 407 | 1,346
Energy Services | Not Designated as Hedging Instrument | Foreign currency contracts |  |
Fair Value |  |
Derivative assets, current | 229 | 36
Derivative liabilities, current | 20 | 104
Derivative assets, noncurrent | 28 | 48
Derivative liabilities, noncurrent | $ 9 | $ 3

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