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REVENUE - TIMING OF REVENUE RECOGNITION - BALANCE SHEET (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Customer accounts receivable |  |
Billed | $ 195,683 | $ 139,263
Unbilled revenues | 41,161 | 6,510
Customers' credit | (19,328) | $ (27,116)
Customers accounts receivables & Customers' credit balances and deposits | 217,516 |
Operating Segments | Natural Gas Distribution |  |
Customer accounts receivable |  |
Billed | 104,853 |
Unbilled revenues | 41,161 |
Customers' credit | (19,328) |
Customers accounts receivables & Customers' credit balances and deposits | 126,686 |
Operating Segments | Clean Energy Ventures |  |
Customer accounts receivable |  |
Billed | 3,057 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 3,057 |
Operating Segments | Energy Services |  |
Customer accounts receivable |  |
Billed | 81,064 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 81,064 |
Operating Segments | Midstream |  |
Customer accounts receivable |  |
Billed | 4,574 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 4,574 |
Home Services and Other |  |
Customer accounts receivable |  |
Billed | 2,135 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 2,135 |
Eliminations |  |
Customer accounts receivable |  |
Billed | 0 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | $ 0 |

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