MORTGAGE LOANS RECEIVABLE - Summary of Mortgage Loans Receivable By Purpose (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 217,593	$ 290,180
Mortgage Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,756,079	$ 1,515,762
% of Portfolio	100.00%
Loan Count | loan	1,456
% of Portfolio	100.00%
Weighted Average Yield	7.80%
Weighted Average Original Life (Months)	15 years
Mortgage Loans Receivable | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 755,077
% of Portfolio	43.00%
Loan Count | loan	568
% of Portfolio	39.00%
Weighted Average Yield	8.10%
Weighted Average Original Life (Months)	14 years 3 months 18 days
Weighted Average Committed Loan Balance to Value, LTC	76.20%
Weighted Average Committed Loan Balance to Value, LTARV	65.50%
Mortgage Loans Receivable | Bridge
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 722,282
% of Portfolio	41.10%
Loan Count | loan	455
% of Portfolio	31.30%
Weighted Average Yield	7.60%
Weighted Average Original Life (Months)	16 years 7 months 6 days
Weighted Average Committed Loan Balance to Value	77.10%
Mortgage Loans Receivable | Renovation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 278,720
% of Portfolio	15.90%
Loan Count | loan	433
% of Portfolio	29.70%
Weighted Average Yield	7.80%
Weighted Average Original Life (Months)	12 years 10 months 24 days
Weighted Average Committed Loan Balance to Value, LTC	77.90%
Weighted Average Committed Loan Balance to Value, LTARV	66.70%