LOANS HELD FOR INVESTMENT - Schedule of Loans Held for Investment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,629,366	$ 1,528,806
Outstanding Principal	$ 1,711,278	$ 1,601,059
Mortgage Loans On Real Estate Unleveraged Effective Yield, Including Non-accrual Loans	5.80%	5.70%
Weighted Average Unleveraged Effective Yield, Excluding Non-accrual Loans	7.30%	7.40%
Weighted Average Remaining Life (in years)	1 year 4 months 24 days	1 year 3 months 18 days
Senior mortgage loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,610,092	$ 1,509,670
Outstanding Principal	$ 1,690,176	$ 1,580,074
Mortgage Loans On Real Estate Unleveraged Effective Yield, Including Non-accrual Loans	5.80%	5.70%
Weighted Average Unleveraged Effective Yield, Excluding Non-accrual Loans	7.30%	7.40%
Weighted Average Remaining Life (in years)	1 year 4 months 24 days
Subordinated debt and preferred equity investments
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 19,274	$ 19,136
Outstanding Principal	$ 21,102	$ 20,985
Mortgage Loans On Real Estate Unleveraged Effective Yield, Including Non-accrual Loans	2.70%	2.70%
Weighted Average Unleveraged Effective Yield, Excluding Non-accrual Loans	6.60%	6.70%
Weighted Average Remaining Life (in years)	1 year 1 month 6 days	1 year 3 months 18 days