MORTGAGE LOANS AND NOTES PAYABLE - Future Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Future principal payment requirements on the outstanding mortgage loans and notes payable at year end
Less: Loan procurement costs, net	$ (3,382)	$ (4,059)
Total mortgage loans and notes payable, net	93,707	96,040
Mortgages
Future principal payment requirements on the outstanding mortgage loans and notes payable at year end
2020	10,893
2021	45,057
2022	923
2023	31,019
2024	4,704
Total mortgage payments	92,596	94,494
Plus: Unamortized fair value adjustment	1,303	1,833
Less: Loan procurement costs, net	(192)	(287)
Total mortgage loans and notes payable, net	$ 93,707	$ 96,040

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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