DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Natural Gas Distribution | Assets, Current
Derivative [Line Items]
Broker margin - current assets	$ 12,866	$ 26,138
Energy Services | Assets, Current
Derivative [Line Items]
Broker margin - current assets	38,703	68,123
Energy Services | Liabilities, Current
Derivative [Line Items]
Broker margin - Current liabilities	$ 1,245	$ 0