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INCOME TAXES, DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Deferred tax assets |  |  |
Investment tax credits | [1] | $ 24,770 | $ 10,341
Deferred service contract revenue |  | 3,440 | 3,299
Incentive compensation |  | 10,369 | 14,632
Fair value of derivatives |  | 0 | 14,350
State net operating losses |  | 12,757 | 8,962
Conservation incentive plan |  | 2,091 | 2,312
Underrecovered gas costs |  | 2,827 | 0
Other |  | 12,762 | 10,078
Total deferred tax assets |  | 69,016 | 63,974
Deferred tax liabilities |  |  |
Property related items |  | (440,420) | (371,017)
Remediation costs |  | (7,641) | (12,429)
Equity investments |  | (37,930) | (35,474)
Post employment benefits |  | (2,976) | (10,268)
Fair value of derivatives |  | (3,180) | 0
Under-recovered gas costs |  | 0 | (5,056)
Other |  | (13,409) | (11,751)
Total deferred tax liabilities |  | (505,556) | (445,995)
Total net deferred tax liabilities |  | (436,540) | (382,021)
NJNG [Member] |  |  |
Deferred tax assets |  |  |
Investment tax credits |  | 2,700 | 2,800
NJRCEV [Member] |  |  |
Deferred tax liabilities |  |  |
Tax credit carryforward |  | $ 22,100 | $ 7,500
[1] | Includes $2.7 million and $2.8 million for NJNG for fiscal 2015 and fiscal 2014, respectively, which is being amortized over the life of the related assets and $22.1 million and $7.5 million for NJRCEV for fiscal 2015 and fiscal 2014, respectively, which is ITC carryforward.

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