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REVENUE - TIMING OF REVENUE RECOGNITION - BALANCE SHEET (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Customer accounts receivable: |  |
Billed | $ 134,173 | $ 139,263
Unbilled revenues | 9,226 | 6,510
Customers' credit balances and deposits | (25,934) | (27,116)
Customers accounts receivables & Customers' credit balances and deposits | 117,465 | 118,657
Operating Segments | Natural Gas Distribution |  |
Customer accounts receivable: |  |
Billed | 52,134 | 36,302
Unbilled revenues | 7,842 | 6,510
Customers' credit balances and deposits | (25,934) | (27,114)
Customers accounts receivables & Customers' credit balances and deposits | 34,042 | 15,698
Operating Segments | Clean Energy Ventures |  |
Customer accounts receivable: |  |
Billed | 5,282 | 3,233
Unbilled revenues | 1,384 | 0
Customers' credit balances and deposits | 0 | 0
Customers accounts receivables & Customers' credit balances and deposits | 6,666 | 3,233
Operating Segments | Energy Services |  |
Customer accounts receivable: |  |
Billed | 70,457 | 97,301
Unbilled revenues | 0 | 0
Customers' credit balances and deposits | 0 | 0
Customers accounts receivables & Customers' credit balances and deposits | 70,457 | 97,301
Operating Segments | Storage and Transportation |  |
Customer accounts receivable: |  |
Billed | 3,905 | 0
Unbilled revenues | 0 | 0
Customers' credit balances and deposits | 0 | 0
Customers accounts receivables & Customers' credit balances and deposits | 3,905 | 0
Home Services and Other |  |
Customer accounts receivable: |  |
Billed | 2,395 | 2,427
Unbilled revenues | 0 | 0
Customers' credit balances and deposits | 0 | (2)
Customers accounts receivables & Customers' credit balances and deposits | $ 2,395 | $ 2,425

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