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RELATED PARTY TRANSACTIONS - Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Payable as of	$ 3,252		$ 3,252		$ 1,903
Pacific Oak Capital Advisors LLC
Related Party Transaction [Line Items]
Capitalized	4,628	$ 5,778	11,308	$ 14,170
Payable as of	3,252		3,252		1,903
Pacific Oak Capital Advisors LLC \| Asset management fees
Related Party Transaction [Line Items]
Expensed	3,630	3,422	9,945	10,802
Payable as of	3,252		3,252		1,903
Pacific Oak Capital Advisors LLC \| Property management fee
Related Party Transaction [Line Items]
Expensed	294	119	552	362
Payable as of	0		0		0
Pacific Oak Capital Advisors LLC \| Disposition fees
Related Party Transaction [Line Items]
Expensed	637	692	744	1,196
Payable as of	0		0		0
Pacific Oak Capital Advisors LLC \| Change in subordinated performance fee due upon termination to affiliate
Related Party Transaction [Line Items]
Expensed	0	1,545	0	1,745
Pacific Oak Capital Advisors LLC \| Acquisition fees on real estate
Related Party Transaction [Line Items]
Capitalized	67	0	67	20
Payable as of	0		0		0
Pacific Oak Capital Advisors LLC \| Acquisition fee on investment in unconsolidated entities
Related Party Transaction [Line Items]
Capitalized	0	$ 0	0	$ 45
Payable as of	$ 0		$ 0		$ 0