VARIABLE INTEREST ENTITIES - Information Regarding Activity in Alternative Energy Partnerships (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Variable Interest Entity [Line Items]
Loss on investments in alternative energy partnerships	$ (3,630)	$ 673	$ (1,905)
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Funding transferred	0		3,631
Cash distribution from investment	538		454
Loss on investments in alternative energy partnerships	(3,630)		(1,905)
Income tax credits recognized	0		0
Tax expense (benefit) recognized from HLBV application	$ (992)		$ (458)

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