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INCOME TAXES (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2015
Income Tax Disclosure [Abstract] |  |  |
Effective income tax rate | 14.70% | 24.90% |
Forecasted tax credits, net of deferred tax | $ 26,800 | $ 27,100 |
Operating Loss Carryforwards [Line Items] |  |  |
Tax benefit associated with the loss carryforwards | 13,000 |  | $ 12,800
ITC carryforward, expiration period |  |  | 20 years
NJRCEV [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
ITC carryforward |  |  | $ 22,100
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards | $ 222,600 |  | 218,100
Net operating loss carryforwards, expiration term | 20 years |  |
Valuation allowance | $ 271 |  | $ 176

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