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REVENUE - TIMING OF REVENUE RECOGNITION - BALANCE SHEET (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Customer accounts receivable |  |
Billed | $ 174,670 | $ 205,490
Unbilled revenues | 7,413 | 7,199
Customers' credit | (19,493) | $ (27,325)
Customers accounts receivables & Customers' credit balances and deposits | 162,590 |
Operating Segments | Natural Gas Distribution |  |
Customer accounts receivable |  |
Billed | 60,852 |
Unbilled revenues | 7,413 |
Customers' credit | (19,490) |
Customers accounts receivables & Customers' credit balances and deposits | 48,775 |
Operating Segments | Clean Energy Ventures |  |
Customer accounts receivable |  |
Billed | 2,942 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 2,942 |
Operating Segments | Energy Services |  |
Customer accounts receivable |  |
Billed | 108,372 |
Unbilled revenues | 0 |
Customers' credit | 0 |
Customers accounts receivables & Customers' credit balances and deposits | 108,372 |
Home Services and Other |  |
Customer accounts receivable |  |
Billed | 2,504 |
Unbilled revenues | 0 |
Customers' credit | (3) |
Customers accounts receivables & Customers' credit balances and deposits | 2,501 |
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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