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COMMITMENTS AND CONTINGENT LIABILITIES, SCHEDULE OF FUTURE COMMITTED EXPENSES (Details) $ in Thousands | 12 Months Ended
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Sep. 30, 2015 USD ($)
Long-term Purchase Commitment [Line Items] |  |
Current charges recoverable through BGSS | $ 86,900 |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 492,559 | [1]
2017 | 230,065 | [1]
2018 | 142,009 | [1]
2019 | 113,263 | [1]
2020 | 102,704 | [1]
Thereafter | $ 790,199 | [1]
Minimum [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Storage and pipeline capacity, fixed period | 1 year |
Maximum [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Storage and pipeline capacity, fixed period | 10 years |
NJRES [Member] | Natural Gas Purchases [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | $ 230,355 |
2017 | 4,438 |
2018 | 0 |
2019 | 0 |
2020 | 0 |
Thereafter | 0 |
NJRES [Member] | Storage Demand Fees [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 27,734 |
2017 | 12,162 |
2018 | 7,591 |
2019 | 4,473 |
2020 | 3,672 |
Thereafter | 3,270 |
NJRES [Member] | Pipeline Demand Fees [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 82,777 |
2017 | 35,118 |
2018 | 15,440 |
2019 | 7,513 |
2020 | 4,256 |
Thereafter | 3,900 |
NJRES [Member] | Subtotal [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 340,866 |
2017 | 51,718 |
2018 | 23,031 |
2019 | 11,986 |
2020 | 7,928 |
Thereafter | 7,170 |
NJNG [Member] | Natural Gas Purchases [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 64,834 |
2017 | 71,248 |
2018 | 11,516 |
2019 | 0 |
2020 | 0 |
Thereafter | 0 |
NJNG [Member] | Storage Demand Fees [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 29,019 |
2017 | 25,332 |
2018 | 15,871 |
2019 | 11,079 |
2020 | 5,345 |
Thereafter | 0 |
NJNG [Member] | Pipeline Demand Fees [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 57,840 |
2017 | 81,767 |
2018 | 91,591 |
2019 | 90,198 |
2020 | 89,431 |
Thereafter | 783,029 |
NJNG [Member] | Subtotal [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
2016 | 151,693 |
2017 | 178,347 |
2018 | 118,978 |
2019 | 101,277 |
2020 | 94,776 |
Thereafter | $ 783,029 |
[1] | Does not include amounts related to intercompany asset management agreements between NJRES and NJNG.

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