MORTGAGE LOANS RECEIVABLE - Summary of the Geographic Distribution of Mortgage Loans Receivable (Details) - Mortgage Loans Receivable - Geographic Concentration Risk - Loan Origination Commitments	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
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	48.20%	52.70%
Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	7.90%	10.20%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	7.30%	6.30%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	6.50%	5.90%
Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	5.00%	6.70%
Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	4.70%	6.60%
Virginia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	3.50%	0.70%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.50%	1.90%
Georgia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.40%	0.80%
Illinois
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	2.30%	0.50%
Other U.S.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Total Loan Commitment	9.70%	7.70%