RELATED PARTY TRANSACTIONS - Schedule of Related-Party Costs Incurred by the Company and Amounts Payable to the Manager (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Payable	$ 4,526		$ 4,526		$ 4,135
ACREM | Continuing Operations
Related Party Transaction [Line Items]
Incurred	4,041	$ 4,462	7,984	$ 8,226
ACREM | Continuing Operations | Management fees
Related Party Transaction [Line Items]
Incurred	2,692	3,000	5,460	6,010
ACREM | Continuing Operations | Incentive fees
Related Party Transaction [Line Items]
Incurred	0	334	0	334
ACREM | Continuing Operations | General and administrative expenses
Related Party Transaction [Line Items]
Incurred	1,277	1,109	2,409	1,842
ACREM | Continuing Operations | Direct costs
Related Party Transaction [Line Items]
Incurred	72	$ 19	115	$ 40
Related Party | Continuing Operations
Related Party Transaction [Line Items]
Payable	4,526		4,526		4,135
Related Party | Continuing Operations | Management fees
Related Party Transaction [Line Items]
Payable	2,692		2,692		2,946
Related Party | Continuing Operations | Incentive fees
Related Party Transaction [Line Items]
Payable	0		0		0
Related Party | Continuing Operations | General and administrative expenses
Related Party Transaction [Line Items]
Payable	1,809		1,809		1,154
Related Party | Continuing Operations | Direct costs
Related Party Transaction [Line Items]
Payable	$ 25		$ 25		$ 35