INCOME TAXES (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	24.90%	16.30%
Operating Loss Carryforwards [Line Items]
Forecasted annual ITC for effective tax rate calculation			$ 18,300,000
Forecasted annual PTC for effective tax rate calculation			187,000
Unrealized Gain (Loss) from Derivative Instruments and Related Transactions	88,673,000	(65,652,000)
ITC carryforward, expiration period			20 years
Forecast [Member]
Operating Loss Carryforwards [Line Items]
Forecasted annual ITC for effective tax rate calculation				25,100,000
Forecasted annual PTC for effective tax rate calculation				2,000,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	169,700,000		153,200,000
Net operating loss carryforwards, expiration term	20 years
Deferred tax assets, operating loss carryforwards	10,000,000		9,000,000
Valuation allowance	211,000		212,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
ITC carryforward			$ 7,500,000