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REVENUE - TIMING OF REVENUE RECOGNITION - BALANCE SHEET (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | --- | ---
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | $ 105,531 | $ 97,540 |
Unbilled revenues | 20,094 | 19,100 |
Customers’ credit balances and deposits | (38,595) | (44,910) | $ (33,246)
Customers accounts receivables & Customers' credit balances and deposits | 87,030 | 71,730 |
Operating Segments | NJNG |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | 51,613 | 55,234 |
Unbilled revenues | 11,839 | 10,784 |
Customers’ credit balances and deposits | (38,572) | (44,898) |
Customers accounts receivables & Customers' credit balances and deposits | 24,880 | 21,120 |
Operating Segments | CEV |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | 8,441 | 9,962 |
Unbilled revenues | 8,255 | 8,316 |
Customers’ credit balances and deposits | 0 | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 16,696 | 18,278 |
Operating Segments | ES |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | 34,002 | 23,716 |
Unbilled revenues | 0 | 0 |
Customers’ credit balances and deposits | 0 | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 34,002 | 23,716 |
Operating Segments | S&T |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | 8,598 | 6,577 |
Unbilled revenues | 0 | 0 |
Customers’ credit balances and deposits | (23) | (12) |
Customers accounts receivables & Customers' credit balances and deposits | 8,575 | 6,565 |
Corporate, Non-Segment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Customer accounts receivable | 2,877 | 2,051 |
Unbilled revenues | 0 | 0 |
Customers’ credit balances and deposits | 0 | 0 |
Customers accounts receivables & Customers' credit balances and deposits | $ 2,877 | $ 2,051 |

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