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BUSINESS SEGMENT AND OTHER OPERATIONS DATA, NET FINANCIAL EARNINGS LOSS RECONCILIATION (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Consolidated net financial earnings |  |  |  |  |  |  |  |  | $ 113,681,000 |  | $ 112,417,000 |  | $ 106,533,000 |
Unrealized (gain) loss from derivative instruments and related transactions, net of taxes |  |  |  |  |  |  |  |  | (5,956,000) | [1],[2] | 22,631,000 | [1],[2] | 23,320,000 | [1],[2]
Effects of economic hedging related to natural gas inventory, net of taxes |  |  |  |  |  |  |  |  | 4,828,000 | [3] | (3,093,000) | [3] | (18,086,000) | [3]
Net income | (20,021,000) | 29,155,000 | 45,469,000 | 60,206,000 | (8,693,000) | (10,320,000) | 54,535,000 | 57,357,000 | 114,809,000 |  | 92,879,000 |  | 101,299,000 |
Taxes related to unrealized gain (loss) from derivative instruments and related transactions |  |  |  |  |  |  |  |  | (3,800,000) |  | 13,000,000 |  | 13,400,000 |
Taxes related to effects of economic hedging related to natural gas inventory |  |  |  |  |  |  |  |  | 2,800,000 |  | (1,800,000) |  | (10,500,000) |
Transactions Between NJNG and NJRES [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized (gain) loss from derivative instruments and related transactions, net of taxes |  |  |  |  |  |  |  |  | $ 286,000 |  | $ 142,000 |  | $ 130,000 |
[1] | Excludes unrealized losses related to an intercompany transaction between NJNG and NJRES that have been eliminated in consolidation of approximately $286,000, $142,000 and $130,000 for the fiscal years ended September 30, 2013, 2012 and 2011, respectively.
[2] | Amounts are net of taxes of approximately $(3.8) million, $13 million, and $13.4 million for the fiscal years ended September 30, 2013, 2012 and 2011, respectively.
[3] | Amounts are net of taxes of approximately $2.8 million, $(1.8) million and $(10.5) million for the fiscal years ended September 30, 2013, 2012 and 2011, respectively.

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