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REVENUE - TIMING OF REVENUE RECOGNITION - BALANCE SHEET (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Sep. 30, 2019
--- | --- | ---
Customer accounts receivable |  |
Billed | $ 250,419 | $ 139,263
Unbilled revenues | 63,656 | 6,510
Customers' credit | (29,573) | $ (27,116)
Customers accounts receivables & Customers' credit balances and deposits | 284,502 |
Operating Segments | Natural Gas Distribution |  |
Customer accounts receivable |  |
Billed | 78,365 |
Unbilled revenues | 63,656 |
Customers' credit | (29,573) |
Customers accounts receivables & Customers' credit balances and deposits | 112,448 |
Operating Segments | Clean Energy Ventures |  |
Customer accounts receivable |  |
Billed | 3,059 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 3,059 |
Operating Segments | Energy Services |  |
Customer accounts receivable |  |
Billed | 164,688 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 164,688 |
Operating Segments | Midstream |  |
Customer accounts receivable |  |
Billed | 2,727 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 2,727 |
Home Services and Other |  |
Customer accounts receivable |  |
Billed | 2,355 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 2,355 |
Eliminations |  |
Customer accounts receivable |  |
Billed | (775) |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | $ (775) |

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