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ACQUISITIONS (Details) - USD ($) $ in Millions				9 Months Ended
	Oct. 06, 2015	Oct. 01, 2015	Dec. 24, 2014	Sep. 30, 2015
Ahana Renewables
Acquisitions
Total transaction value			$ 117.7
Cash consideration			66.3
Reimbursement of cash held			12.5
Assumed debt			$ 38.9
Ahana Renewables | Minimum | Solar assets
Acquisitions
Useful life				10 years
Ahana Renewables | Maximum | Solar assets
Acquisitions
Useful life				25 years
Ahana Renewables | Tax Equity Investor
Acquisitions
Period of placed in service date for solar assets			5 years
Ahana Renewables | Tax Equity Investor | Minimum
Acquisitions
Period to receive return on investment			2 years
Ahana Renewables | Tax Equity Investor | Maximum
Acquisitions
Period to receive return on investment			4 years
Subsequent Event [Member]
Acquisitions
Total transaction value		$ 145.0
Cash consideration		85.0
Loan amount		$ 60.0
Subsequent Event [Member] | CellOne [Member]
Acquisitions
Ownership percentage	43.00%
Ownership interest held by minority shareholders	15.00%
Subsequent Event [Member] | KeyTech [Member]
Acquisitions
Ownership percentage	51.00%
Cash consideration	$ 42.0
Subsequent Event [Member] | KeyTech [Member] | CellOne [Member]
Acquisitions
Ownership percentage	85.00%

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