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DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
NJNG | Assets, Current |  |
Derivative [Line Items] |  |
Broker margin - current assets | $ 4,975 | $ 5,915
ES | Assets, Current |  |
Derivative [Line Items] |  |
Broker margin - current assets | 8,268 | 14,881
ES | Liabilities, Current |  |
Derivative [Line Items] |  |
Broker margin - current liabilities | $ 1,146 | $ 8,029

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