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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 3 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Summary of Gas in Storage | The following table summarizes gas in storage, at average cost by company as of:
| December 31, 2017 | September 30, 2017
($ in thousands) | Gas in Storage |  | Bcf | Gas in Storage |  | Bcf
Energy Services |  | $ | 144,456 |  | 51.9 |  |  | $ | 122,884 |  | 53.9 |
Natural Gas Distribution |  | 58,991 |  | 16.5 |  |  | 79,179 |  | 21.8 |
Total |  | $ | 203,447 |  | 68.4 |  |  | $ | 202,063 |  | 75.7 |
Accounts Receivable by Subsidiary | Customer accounts receivable include outstanding billings from the following subsidiaries as of:
(Thousands) | December 31, 2017 |  | September 30, 2017
Energy Services | $ | 246,203 |  | 76 | % |  | $ | 150,322 |  | 77 | %
Natural Gas Distribution (1) | 72,067 |  | 22 |  |  | 37,432 |  | 19 |
Clean Energy Ventures | 3,072 |  | 1 |  |  | 2,655 |  | 1 |
NJRHS and other | 4,064 |  | 1 |  |  | 6,058 |  | 3 |
Total | $ | 325,406 |  | 100 | % |  | $ | 196,467 |  | 100 | %
(1) | Does not include unbilled revenues of $70.1 million and $7.2 million as of December 31, 2017 and September 30, 2017, respectively.

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