CASH, CASH EQUIVALENTS AND RESTRICTED CASH - Schedule of Reconciliation of Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 322,979	$ 409,896
Operating Segments | Investment Portfolio
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	105,936	150,432
Operating Segments | Origination and Servicing
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	153,526	195,490
Operating Segments | Mortgage Loans Receivable
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	40,094	37,805
Operating Segments | Asset Management
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 23,423	$ 26,169