LOANS HELD FOR INVESTMENT - Schedule of Current Investment Portfolio (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($) option	Dec. 31, 2024 USD ($)	Sep. 19, 2024 USD ($)	Jun. 12, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 1,355,936	$ 1,355,936	$ 1,698,506
Carrying Amount	1,300,670	$ 1,300,670	1,656,688
Unleveraged Effective Yield		6.30%
Proceeds from Noncontrolling interests	1,900	$ 3,800
Total unfunded commitments	36,514	$ 36,514	$ 74,577
Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of extension options | option		1
Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of extension options | option		2
Extension period of maturity date (in months)		12 months
Office | IL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate Under Subordinated Debt and Preferred Equity Investments		10.00%
Office | NY | Subordinated B Note
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate Under Subordinated Debt and Preferred Equity Investments		5.50%
Office | Senior Mortgage Loans | IL | SOFR Plus 2.25 %, Due March 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	166,400	$ 166,400
Carrying Amount	$ 146,300	$ 146,300
Interest Rate Under Senior Mortgage Loans	2.25%	2.25%
Unleveraged Effective Yield		0.00%
Office | Senior Mortgage Loans | IL | SOFR Plus 3.05% Due Oct 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 54,200	$ 54,200
Carrying Amount	$ 54,200	$ 54,200
Interest Rate Under Senior Mortgage Loans	4.25%	4.25%
Unleveraged Effective Yield		8.70%
Office | Senior Mortgage Loans | NY | SOFR Plus 8.95% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate Under Senior Mortgage Loans	8.95%	8.95%
Office | Senior Mortgage Loans | NY | SOFR Plus 2.65% Due Jul 2027
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 59,000	$ 59,000
Carrying Amount	$ 59,000	$ 59,000
Interest Rate Under Senior Mortgage Loans	2.65%	2.65%
Unleveraged Effective Yield		7.00%
Office | Senior Mortgage Loans | NY | SOFR Plus 2.65% Due Jul 2027 | Senior A Note
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate Under Senior Mortgage Loans	2.65%	2.65%
Office | Senior Mortgage Loans | AZ | SOFR Plus 3.61%, Due Oct 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 80,800	$ 80,800
Carrying Amount	$ 80,800	$ 80,800
Interest Rate Under Senior Mortgage Loans	3.61%	3.61%
Unleveraged Effective Yield		8.30%
Office | Senior Mortgage Loans | NC
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal				$ 68,600
Office | Senior Mortgage Loans | NC | SOFR Plus 3.65% Due Aug 2028
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 70,600	$ 70,600
Carrying Amount	$ 70,500	$ 70,500
Interest Rate Under Senior Mortgage Loans	3.65%	3.65%
Unleveraged Effective Yield		8.00%
Office | Senior Mortgage Loans | Diversified | SOFR Plus 4.25%, Due July 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 62,300	$ 62,300
Carrying Amount	$ 61,900	$ 61,900
Interest Rate Under Senior Mortgage Loans	4.25%	4.25%
Unleveraged Effective Yield		9.30%
Office | Senior Mortgage Loans | CA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal					$ 33,200
Office | Senior Mortgage Loans | CA | SOFR Plus 2.65% Due Jul 2027 | Senior A Note
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total unfunded commitments	$ 500	$ 500
Office | Senior Mortgage Loans | CA | SOFR Plus 2.65% Due Jul 2027 | Subordinated B Note
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	0	0
Office | Senior Mortgage Loans | CA | SOFR Plus 3.50%, Due Nov 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	20,000	20,000
Carrying Amount	$ 20,000	$ 20,000
Interest Rate Under Senior Mortgage Loans	3.50%	3.50%
Unleveraged Effective Yield		8.10%
Office | Subordinated debt and preferred equity investments | NY | 5 .50%, Due July 2027
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 10,500	$ 10,500
Carrying Amount	7,600	$ 7,600
Interest Rate Under Subordinated Debt and Preferred Equity Investments		5.50%
Unleveraged Effective Yield		0.00%
Residential/Condo | Senior Mortgage Loans | NY | SOFR Plus 8.95% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	140,400	$ 140,400
Carrying Amount	$ 112,600	$ 112,600
Interest Rate Under Senior Mortgage Loans	8.95%	8.95%
Unleveraged Effective Yield		0.00%
Multifamily | Senior Mortgage Loans | NY | SOFR Plus 3.90%, Due June 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 132,200	$ 132,200
Carrying Amount	$ 130,900	$ 130,900
Interest Rate Under Senior Mortgage Loans	3.90%	3.90%
Unleveraged Effective Yield		9.30%
Multifamily | Senior Mortgage Loans | TX | SOFR Plus 2.95% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 68,500	$ 68,500
Carrying Amount	$ 68,400	$ 68,400
Interest Rate Under Senior Mortgage Loans	2.95%	2.95%
Unleveraged Effective Yield		7.60%
Multifamily | Senior Mortgage Loans | TX | SOFR Plus 2.60%, Due Oct 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 23,100	$ 23,100
Carrying Amount	$ 23,000	$ 23,000
Interest Rate Under Senior Mortgage Loans	2.60%	2.60%
Unleveraged Effective Yield		7.40%
Multifamily | Senior Mortgage Loans | CA | SOFR Plus 3.00% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 31,700	$ 31,700
Carrying Amount	$ 31,700	$ 31,700
Interest Rate Under Senior Mortgage Loans	3.00%	3.00%
Unleveraged Effective Yield		7.60%
Multifamily | Senior Mortgage Loans | OH | SOFR Plus 3.05%, Due October 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 57,300	$ 57,300
Carrying Amount	$ 57,000	$ 57,000
Interest Rate Under Senior Mortgage Loans	3.05%	3.05%
Unleveraged Effective Yield		7.70%
Multifamily | Senior Mortgage Loans | PA | SOFR Plus 2.50% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 28,200	$ 28,200
Carrying Amount	$ 28,200	$ 28,200
Interest Rate Under Senior Mortgage Loans	2.50%	2.50%
Unleveraged Effective Yield		6.80%
Multifamily | Senior Mortgage Loans | WA | SOFR Plus 3.00% Due Nov 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 23,100	$ 23,100
Carrying Amount	$ 23,100	$ 23,100
Interest Rate Under Senior Mortgage Loans	3.00%	3.00%
Unleveraged Effective Yield		7.50%
Mixed-use | Senior Mortgage Loans | NY | SOFR Plus 3.75% Due July 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 78,300	$ 78,300
Carrying Amount	$ 78,300	$ 78,300
Interest Rate Under Senior Mortgage Loans	3.75%	3.75%
Unleveraged Effective Yield		8.30%
Hotel | Senior Mortgage Loans | NY | LIBOR Plus 4 .40% Due Mar 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 55,700	$ 55,700
Carrying Amount	$ 55,500	$ 55,500
Interest Rate Under Senior Mortgage Loans	4.40%	4.40%
Unleveraged Effective Yield		9.00%
Hotel | Senior Mortgage Loans | CA | SOFR Plus 4.20% Due Mar 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 60,800	$ 60,800
Carrying Amount	$ 60,700	$ 60,700
Interest Rate Under Senior Mortgage Loans	4.20%	4.20%
Unleveraged Effective Yield		8.80%
Industrial | Senior Mortgage Loans | CA | SOFR Plus 3.85%, Due January 2027
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 7,000	$ 7,000
Carrying Amount	$ 7,000	$ 7,000
Interest Rate Under Senior Mortgage Loans	3.85%	3.85%
Unleveraged Effective Yield		8.20%
Industrial | Senior Mortgage Loans | MA | SOFR Plus 2.90% Due Jun 2028
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 48,100	$ 48,100
Carrying Amount	$ 48,000	$ 48,000
Interest Rate Under Senior Mortgage Loans	2.90%	2.90%
Unleveraged Effective Yield		7.30%
Industrial | Senior Mortgage Loans | NJ | SOFR Plus 8.85%, Due Nov 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 27,800	$ 27,800
Carrying Amount	$ 27,800	$ 27,800
Interest Rate Under Senior Mortgage Loans	8.85%	8.85%
Unleveraged Effective Yield		13.20%
Industrial | Subordinated debt and preferred equity investments | CA | SOFR Plus 3.85%, Due January 2027
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 12,600	$ 12,600
Carrying Amount	10,900	$ 10,900
Interest Rate Under Subordinated Debt and Preferred Equity Investments		3.85%
Unleveraged Effective Yield		0.00%
Self Storage | Senior Mortgage Loans | MA | SOFR Plus 3.00% Due Nov 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	7,700	$ 7,700
Carrying Amount	$ 7,700	$ 7,700
Interest Rate Under Senior Mortgage Loans	3.00%	3.00%
Unleveraged Effective Yield		7.60%
Self Storage | Senior Mortgage Loans | PA | SOFR Plus 3.00% Due Dec 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 18,200	$ 18,200
Carrying Amount	$ 18,200	$ 18,200
Interest Rate Under Senior Mortgage Loans	3.00%	3.00%
Unleveraged Effective Yield		7.60%
Self Storage | Senior Mortgage Loans | IN | SOFR Plus 3.60%, Due Jun 2026
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Principal	$ 11,400	$ 11,400
Carrying Amount	$ 11,400	$ 11,400
Interest Rate Under Senior Mortgage Loans	3.60%	3.60%
Unleveraged Effective Yield		8.00%