SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 numberOfInvestments numberOfProperties numberOfSegments
Accounting Policies [Abstract]
Number of reportable segments | numberOfSegments	1
Number of investments in unconsolidated joint venture | numberOfInvestments	1
Office Building
Real Estate Properties [Line Items]
Number of real estate properties | numberOfProperties	3