SEGMENT DISCLOSURE - Reconciliation of Segment Operating Income to Net Income Attributable to Company (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest and other income	$ 3,798	$ 2,957
Asset management and other fees to related parties	(2,259)	(2,645)
Interest expense	(2,632)	(3,167)
General and administrative	(2,622)	(1,734)
Depreciation and amortization	(5,037)	(5,258)
LOSS BEFORE PROVISION (BENEFIT) FOR INCOME TAXES	(3,297)	(1,278)
(Provision) benefit for income taxes	(374)	22
NET LOSS	(3,671)	(1,256)
Net loss (income) attributable to noncontrolling interests	1	(4)
NET LOSS ATTRIBUTABLE TO THE COMPANY	(3,670)	(1,260)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment net operating income	9,086	11,535
Expense reimbursements to related parties—corporate	(731)	(682)
Corporate and Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest and other income	0	1
Asset management and other fees to related parties	(2,259)	(2,645)
Interest expense	(2,441)	(2,876)
General and administrative	(2,041)	(1,223)
Non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Expense reimbursements to related parties—corporate	$ (605)	$ (812)