SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)		3 Months Ended	12 Months Ended
	May 05, 2021 shares	Mar. 31, 2025 USD ($) sub-servicer loan $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Feb. 14, 2019 USD ($)	Jan. 15, 2019 USD ($)	Dec. 15, 2015 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Number of commercial real estate loans included in loan performance analytical model | loan		125,000
Number of sub-servicers | sub-servicer		2
Principal amount | $		$ 47,750,000	$ 47,750,000
Common stock, shares authorized (in shares)		450,000,000	450,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Common stock, shares issued (in shares)		52,324,472	52,309,209
Common stock, shares outstanding (in shares)		52,324,472	52,309,209
Stock repurchase program, authorized amount | $						$ 10,000,000
Preferred stock, shares authorized (in shares)		50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)		2,400,000	2,400,000
Preferred stock, dividend rate, percentage		7.875%	7.875%
Preferred stock, shares outstanding (in shares)		2,400,000	2,400,000
REO Assets Held-for-Use | Minimum
Debt and Equity Securities, FV-NI [Line Items]
Estimated useful life		7 years
REO Assets Held-for-Use | Maximum
Debt and Equity Securities, FV-NI [Line Items]
Estimated useful life		39 years
Series A Cumulative Redeemable Preferred Stock
Debt and Equity Securities, FV-NI [Line Items]
Preferred stock, shares issued (in shares)	2,400,000	2,400,000	2,400,000
Preferred stock, dividend rate, percentage	7.875%
Preferred stock, shares outstanding (in shares)		2,400,000	2,400,000
Delayed Draw Facility | Credit Agreement
Debt and Equity Securities, FV-NI [Line Items]
Principal amount | $		$ 47,750,000		$ 40,250,000	$ 40,250,000
Collateralized Loan Obligations
Debt and Equity Securities, FV-NI [Line Items]
Maximum exposure to loss from consolidated trusts | $		$ 234,850,000	$ 234,850,000