INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Percent valuation allowance against U.S. taxable REIT deferred tax assets	100.00%
Increase in valuation allowance	$ 6.7
Operating Partnership
Income Tax Contingency [Line Items]
Ownership interest	96.90%