FINANCING RECEIVABLES (Loan Portfolio Aging Analysis) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	$ 1,920,205	$ 2,057,590
Total Loans Receivable (3)	1,920,205	2,057,590
Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	1,920,205	2,057,590
Total Loans Receivable (3)	1,920,205	2,057,590
Total Loans > 90 Days and Accruing	0	0
Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	1,915,505	2,052,890
Total Loans Receivable (3)	1,915,505	2,052,890
Total Loans > 90 Days and Accruing	0	0
Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	4,700	4,700
Total Loans Receivable (3)	4,700	4,700
Total Loans > 90 Days and Accruing	0	0
30-59 Days | Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	10,372	0
Total Loans Receivable (3)	10,372	0
30-59 Days | Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	5,672	0
Total Loans Receivable (3)	5,672	0
30-59 Days | Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	4,700	0
Total Loans Receivable (3)	4,700	0
60-89 Days | Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	0	0
Total Loans Receivable (3)	0	0
60-89 Days | Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	0	0
Total Loans Receivable (3)	0	0
60-89 Days | Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	0	0
Total Loans Receivable (3)	0	0
Greater than 90 Days | Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	28,164	28,767
Total Loans Receivable (3)	28,164	28,767
Greater than 90 Days | Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	28,164	28,767
Total Loans Receivable (3)	28,164	28,767
Greater than 90 Days | Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	0	0
Total Loans Receivable (3)	0	0
Total Past Due | Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	38,536	28,767
Total Loans Receivable (3)	38,536	28,767
Total Past Due | Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	33,836	28,767
Total Loans Receivable (3)	33,836	28,767
Total Past Due | Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	4,700	0
Total Loans Receivable (3)	4,700	0
Current | Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	1,881,669	2,028,823
Total Loans Receivable (3)	1,881,669	2,028,823
Current | Commercial Real Estate Loans | Whole Loans
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	1,881,669	2,024,123
Total Loans Receivable (3)	1,881,669	2,024,123
Current | Commercial Real Estate Loans | Mezzanine loan
Financing Receivable Recorded Investment Past Due [Line Items]
CRE loans	0	4,700
Total Loans Receivable (3)	$ 0	$ 4,700