DISPOSITIONS AND PLATFORM INVESTMENTS - Disposition - US Solar Business (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - U.S. Solar Operations - USD ($) $ in Thousands		12 Months Ended
	Nov. 06, 2018	Dec. 31, 2018
Disposition
Cash proceeds	$ 65,286
Debt assumption	57,300
Receivables, escrowed	6,500
Total value of disposal consideration	122,600
Assets and liabilities disposed
Cash	3,049
Accounts receivable	1,248
Prepayments and other current assets	801
Property, plant and equipment	94,678
Restricted cash	8,407
Other assets	38
Current portion of long-term debt	(6,992)
Accounts payable and accrued liabilities	(938)
Accrued taxes	586
Long-term debt, excluding current portion	(48,038)
Net assets disposed	52,839
Consideration less net assets disposed	12,447
Transaction costs	(2,133)
Gain	10,314
Gain to non-controlling interests	$ 1,100
Transaction-related charges		$ 2,100