MORTGAGE LOANS RECEIVABLE - Summary of Mortgage Loans Receivable By Purpose (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) loan	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 63,359	$ 94,401
Mortgage Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 2,135,424	$ 2,064,028
% of Portfolio	100.00%
Loan Count | loan	1,404
% of Portfolio	100.00%
Weighted Average Yield	9.60%
Weighted Average Original Life (Months)	19 years 8 months 12 days
Mortgage Loans Receivable | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 947,754
% of Portfolio	44.30%
Loan Count | loan	422
% of Portfolio	30.00%
Weighted Average Yield	9.80%
Weighted Average Original Life (Months)	16 years 1 month 6 days
Weighted Average Committed Loan Balance to Value, LTC	75.00%
Weighted Average Committed Loan Balance to Value, LTARV	63.30%
Mortgage Loans Receivable | Bridge
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 925,859
% of Portfolio	43.40%
Loan Count | loan	682
% of Portfolio	48.60%
Weighted Average Yield	9.30%
Weighted Average Original Life (Months)	25 years 1 month 6 days
Weighted Average Committed Loan Balance to Value	69.90%
Mortgage Loans Receivable | Renovation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 261,811
% of Portfolio	12.30%
Loan Count | loan	300
% of Portfolio	21.40%
Weighted Average Yield	9.90%
Weighted Average Original Life (Months)	14 years
Weighted Average Committed Loan Balance to Value, LTC	79.40%
Weighted Average Committed Loan Balance to Value, LTARV	68.20%