RELATED PARTY TRANSACTIONS - Narrative (Details)		12 Months Ended
	Apr. 25, 2022 USD ($)	Dec. 31, 2023 USD ($) quarter loan	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Management fee renewal term (in years)		1 year
Management agreement termination, termination fee times average annual base management free and incentive fees received		300.00%
Management fee look back period		24 months
Loans held for investment		$ 2,126,524,000	$ 2,264,008,000
Outstanding principal		$ 2,158,045,000	2,282,821,000
Number of affiliates of company's manager that may originate commercial real estate loans (or more) | loan		1
Residential
Related Party Transaction [Line Items]
Loans held for investment		$ 236,700,000	213,700,000
ACREM
Related Party Transaction [Line Items]
Base management fees as a percentage of stockholders' equity per annum		1.50%
Incentive fee payable (not less than)		$ 0
Percentage multiplied to arrive at first value affecting calculation of incentive fees		20.00%
Previous period for which core earnings are considered to arrive at first value affecting calculation of incentive fees		12 months
Previous period for product of weighted average price per share and weighted average number of shares of common stock and other shares		12 months
Percentage multiplied to arrive at difference of first value affecting calculation of incentive fees		8.00%
Related party transaction, number of fiscal quarter | loan		3
Period whose fiscal quarters are considered to arrive at first value affecting calculation of incentive fees		12 months
Minimum cumulative core earnings, number of quarters | quarter		12
Minimum cumulative core earnings for calculation of incentive fee		$ 0
Related Party
Related Party Transaction [Line Items]
Amended agreement to exclude real estate revenues from net income	$ 2,400,000
Amended agreement to include gain on termination of interest rate cap derivative	$ 2,000,000
Incentive fees		$ 334,000	$ 3,400,000	$ 2,800,000