DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Derivative [Line Items] | ||
| Broker margin - current assets | $ 8,918 | $ 8,920 |
| Broker margin - current liabilities | 653 | 3,949 |
| NJNG | ||
| Derivative [Line Items] | ||
| Broker margin - current assets | 5,614 | 5,480 |
| ES | ||
| Derivative [Line Items] | ||
| Broker margin - current assets | 3,304 | 3,440 |
| Broker margin - current liabilities | $ 653 | $ 3,949 |
| X | ||||||||||
- Definition Amount payable to broker-dealers or clearing organizations for executing or clearing trades or orders. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|