MORTGAGE LOANS RECEIVABLE (AS RESTATED) - Schedule of Geographic Distribution of the Underlying Mortgage Loans Receivable (Details) - Mortgage loans receivable - Geographic Concentration Risk - Loan Origination Commitments	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	100.00%	100.00%
California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	49.10%	47.80%
Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	7.00%	7.90%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	6.80%	7.80%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	6.70%	6.70%
Georgia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	5.10%	2.50%
Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	4.10%	4.80%
Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	3.80%	4.10%
Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	3.30%	2.70%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.60%	2.70%
Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.30%	3.10%
Other US
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	9.20%	9.90%