CASH, CASH EQUIVALENTS AND RESTRICTED CASH (AS RESTATED) - Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 409,896	$ 355,588	$ 306,841	$ 354,495	$ 292,820	$ 521,232	$ 429,189	$ 233,665
Operating Segments | Investment Portfolio
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	150,432				106,202
Operating Segments | Origination and servicing
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	195,490				161,249
Operating Segments | Mortgage Loans Receivable
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	37,805				25,369
Operating Segments | Asset management(A)
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 26,169				$ 0