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DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Natural Gas Distribution
Derivative [Line Items]
Broker margin - Current assets	$ 0	$ 1,982
Accounts payable and other	(219)	0
Energy Services
Derivative [Line Items]
Broker margin - Current assets	$ 52,211	$ 71,741

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Amount of other payables due to broker-dealers or clearing organizations.

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Amount of other receivables due from broker-dealers or clearing organizations.

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