MORTGAGE LOANS RECEIVABLE - Summary of the Geographic Distribution of Mortgage Loans Receivable (Details) - Mortgage Loans Receivable - Geographic Concentration Risk - Loan Origination Commitments	3 Months Ended
	Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	100.00%
California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	54.90%
Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	9.70%
Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	7.20%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	5.60%
Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	5.50%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	4.20%
North Carolina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.50%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.00%
New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	1.60%
Washington D.C.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	1.30%
Other U.S.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	5.50%