RELATED PARTY TRANSACTIONS - Advisory Fee (Details) - Advisor - Affiliated Entity - Advisory Fees	12 Months Ended
	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
% of aggregate cost or investment of any interest in any other real estate-related entity or debt investment or other investment (per annum)	0.80%
% of total consideration paid in connection with the disposition of real property or a liquidity event involving gross market capitalization of the Company upon occurrence of a listing	1.00%
Threshold for performance component of advisory fee	12.50%
Threshold of annual total return as % of NAV	5.00%
Performance component earned for excess return over the hurdle amount	100.00%
Maximum performance component limited to % of total annual return	12.50%
Loss carryforward	$ 0
United States
Related Party Transaction [Line Items]
% of aggregate cost of real property assets	0.80%
Outside the U.S.
Related Party Transaction [Line Items]
% of aggregate cost of real property assets	1.20%