SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands		6 Months Ended	9 Months Ended	12 Months Ended
	Apr. 22, 2020	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment of real estate investments		$ 0		$ 0
Accrued trailing fee-estimated payable for future			$ 14,107	$ 6,221
RREEF America
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum offering costs as percentage of gross proceeds from initial public offering			15.00%
Underwriting compensation for public offering as percent of gross offering proceeds	10.00%		10.00%
Class A Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of distribution fee	0.50%		0.50%
Percentage of dealer manager fee	0.55%		0.55%
Class T Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Underwriting compensation for public offering as percent of gross offering proceeds	8.50%
Percentage of distribution fee	1.00%		1.00%
Duration of distribution fee	3 years		3 years
Percentage of dealer manager fee	2.50%
Class S Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of distribution fee	0.85%		0.85%
Duration of distribution fee	7 years		6 years 6 months
Class T2 Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of distribution fee	0.85%		0.85%
Duration of distribution fee	6 years		6 years 6 months
Percentage of dealer manager fee	0.50%
Class I Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of dealer manager fee	0.55%		0.55%