MORTGAGE LOANS RECEIVABLE - Schedule of Difference Between Aggregate UPB and Aggregate Carrying Value of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 364,977
90+
Accounts, Notes, Loans and Financing Receivable [Line Items]
UPB	0	$ 0
Carrying Value	0	0
Carrying Value Over (Under) UPB	0	0
Mortgage Loans Receivable | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
UPB	2,329,505	2,184,470,000
Carrying Value	2,344,877	2,183,047,000
Carrying Value Over (Under) UPB	15,372	(1,423,000)
Mortgage Loans Receivable | 90+
Accounts, Notes, Loans and Financing Receivable [Line Items]
UPB	41,264	49,929,000
Carrying Value	39,867	49,866,000
Carrying Value Over (Under) UPB	$ (1,397)	$ (63,000)