RELATED PARTY TRANSACTIONS - Additional Information (Details) - USD ($)		6 Months Ended
	Nov. 01, 2019	Jun. 30, 2020	Dec. 31, 2019
Pacific Oak Opportunity Zone Fund I, LLC
Related Party Transaction [Line Items]
Investments			$ 2,900,000
Incurred		$ 26,000
KBS Capital Advisors LLC
Related Party Transaction [Line Items]
Term of advisory agreement	1 year
Renewal period	1 year
Pacific Oak Capital Advisors, LLC
Related Party Transaction [Line Items]
Acquisition fee, percent			1.50%
Benchmark amount of contracted acquisition sales price			$ 25,000,000.0
Acquisition fee as percent of benchmark contract sales price			1.00%
Quarterly asset management fee, percent of acquisition purchase price			0.25%
Financing fee, percent of original principal amount of indebtedness incurred			0.50%