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DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Natural Gas Distribution | Assets, Current |  |
Derivative [Line Items] |  |
Broker margin - current assets | $ 4,027 | $ 26,138
Energy Services | Assets, Current |  |
Derivative [Line Items] |  |
Broker margin - current assets | 16,210 | 68,123
Energy Services | Liabilities, Current |  |
Derivative [Line Items] |  |
Broker margin - Current liabilities | $ 1,218 | $ 0

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