LOANS (Summary of Loans) (Details)	Jun. 30, 2024 USD ($) Loan Note	Dec. 31, 2023 USD ($) Loan Note	Dec. 31, 2022 USD ($)
Receivables With Imputed Interest [Line Items]
Amortized Cost, Loans held for investment	$ 1,713,711,000	$ 1,857,093,000
Less: allowance for credit losses	$ (34,990,000)	$ (28,757,000)	$ (18,803,000)
Mezzanine loan
Receivables With Imputed Interest [Line Items]
Number of bank loans \| Note	1	1
Commercial Real Estate Loans
Receivables With Imputed Interest [Line Items]
Principal, Loans held for investment	$ 1,717,687,000	$ 1,862,965,000
Unamortized (Discount) Premium, net	(3,976,000)	(5,872,000)
Amortized Cost, Loans held for investment	1,713,711,000	1,857,093,000
Less: allowance for credit losses	(34,990,000)	(28,757,000)
Carrying Value, Loans held for investment	1,678,721,000	1,828,336,000
Loan origination fees	3,100,000	5,800,000
Deferred amendment fees	$ 902,000	$ 110,000
Concentration of loan portfolio risk	100.00%	100.00%
Commercial Real Estate Loans \| Multifamily
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 1,333,273,000	$ 1,453,681,000
Concentration of loan portfolio risk	79.40%	79.60%
Commercial Real Estate Loans \| Office
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 229,276,000	$ 247,410,000
Concentration of loan portfolio risk	13.70%	13.50%
Commercial Real Estate Loans \| Hotel
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 67,541,000	$ 70,857,000
Concentration of loan portfolio risk	4.00%	3.90%
Commercial Real Estate Loans \| Self Storage
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 48,631,000	$ 48,363,000
Concentration of loan portfolio risk	2.90%	2.60%
Commercial Real Estate Loans \| Retail
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment		$ 8,025,000
Concentration of loan portfolio risk	0.00%	0.40%
Commercial Real Estate Loans \| Southwest
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 464,051,000	$ 484,902,000
Concentration of loan portfolio risk	27.60%	26.60%
Commercial Real Estate Loans \| Southeast
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 315,470,000	$ 401,624,000
Concentration of loan portfolio risk	18.80%	22.00%
Commercial Real Estate Loans \| Mountain
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 275,437,000	$ 275,120,000
Concentration of loan portfolio risk	16.40%	15.00%
Commercial Real Estate Loans \| Mid Atlantic
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 239,217,000	$ 236,104,000
Concentration of loan portfolio risk	14.20%	12.90%
Commercial Real Estate Loans \| Pacific
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 165,358,000	$ 169,789,000
Concentration of loan portfolio risk	9.90%	9.30%
Commercial Real Estate Loans \| Northeast
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 133,279,000	$ 161,172,000
Concentration of loan portfolio risk	7.90%	8.80%
Commercial Real Estate Loans \| East North Central
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 46,220,000	$ 60,401,000
Concentration of loan portfolio risk	2.80%	3.30%
Commercial Real Estate Loans \| West North Central
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 39,689,000	$ 39,224,000
Concentration of loan portfolio risk	2.40%	2.10%
Commercial Real Estate Loans \| Whole Loans
Receivables With Imputed Interest [Line Items]
Principal, Loans held for investment	$ 1,712,987,000	$ 1,858,265,000
Unamortized (Discount) Premium, net	(3,976,000)	(5,872,000)
Amortized Cost, Loans held for investment	1,709,011,000	1,852,393,000
Less: allowance for credit losses	(30,290,000)	(24,057,000)
Carrying Value, Loans held for investment	$ 1,678,721,000	$ 1,828,336,000
Quantity \| Loan	63	69
Loans receivable, interest rate floor	5.38%	5.39%
Loans held for investment, unfunded loan commitments	$ 89,100,000	$ 109,400,000
Mezzanine tranche	$ 2,100,000
Fixed interest rate	15.00%
Commercial Real Estate Loans \| Whole Loans \| Minimum
Receivables With Imputed Interest [Line Items]
Contractual Interest Rates	2.50%	2.50%
Commercial Real Estate Loans \| Whole Loans \| Maximum
Receivables With Imputed Interest [Line Items]
Contractual Interest Rates	8.61%	8.61%
Commercial Real Estate Loans \| Mezzanine loan
Receivables With Imputed Interest [Line Items]
Principal, Loans held for investment	$ 4,700,000	$ 4,700,000
Amortized Cost, Loans held for investment	4,700,000	4,700,000
Less: allowance for credit losses	$ (4,700,000)	$ (4,700,000)
Quantity \| Loan	1	1
Contractual Interest Rates	10.00%	10.00%
Loans receivable, interest rate floor	0.75%	0.70%
Commercial Real Estate Loans \| Whole Loans in Default
Receivables With Imputed Interest [Line Items]
Amortized Cost, Loans held for investment	$ 14,400,000	$ 41,200,000
Quantity \| Loan	1	3
Commercial Real Estate Loans \| Whole Loans in Default \| Office
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 14,400,000	$ 33,100,000
Quantity \| Loan	1	2
Commercial Real Estate Loans \| Whole Loans in Default \| Retail
Receivables With Imputed Interest [Line Items]
Quantity \| Loan	1	1
Commercial Real Estate Loans \| Whole Loans in Default \| Southwest
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment	$ 14,400,000	$ 19,100,000
Quantity \| Loan	1	1
Commercial Real Estate Loans \| Whole Loans in Default \| Northeast
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment		$ 8,000,000
Quantity \| Loan		1
Commercial Real Estate Loans \| Whole Loans in Default \| East North Central
Receivables With Imputed Interest [Line Items]
Carrying Value, Loans held for investment		$ 14,000,000
Quantity \| Loan	1
Commercial Real Estate Loans \| Mazzanine Loans In Payment Defaults
Receivables With Imputed Interest [Line Items]
Number of bank loans \| Loan	1	1
Recorded investment	$ 4,700,000	$ 4,700,000

The percentage of the loan portfolio credit concentration risk.

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