INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) ft² in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) property	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) property	Jun. 30, 2022 USD ($)	Jun. 27, 2023 ft²	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Investment balance	$ 52,509		$ 52,509				$ 70,842
Real estate held for investment, net	1,162,118		1,162,118				1,216,898
Total assets	1,414,576		1,414,576				1,559,245
Total liabilities	1,078,048		1,078,048				1,142,852
Total equity	336,528	$ 461,373	336,528	$ 461,373		$ 396,623	416,393	$ 471,986	$ 482,059
Total revenues	35,896	43,539	74,021	82,065
Operating loss	(14,415)	(22,272)	893	(24,536)
Net loss	(57,481)	(8,369)	(77,251)	(13,100)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Real estate held for investment, net	475,063		475,063				471,503
Total assets	541,670		541,670				546,142
Notes payable related to real estate held for investment, net	498,579		498,579				490,302
Total liabilities	526,208		526,208				501,861
Total equity	15,462		15,462				44,281
Total revenues	10,673	12,461	21,793	24,570
Operating loss	(13,718)	(6,807)	(27,753)	(12,060)
Net loss	$ (13,771)	$ (6,795)	$ (27,719)	$ (12,036)
110 William Joint Venture
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property	1		1
Ownership percentage	60.00%		60.00%
Investment balance	$ 0		$ 0				0
Net rentable area (in sq feet) | ft²					640
353 Sacramento Joint Venture
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property	1		1
Ownership percentage	55.00%		55.00%
Investment balance	$ 26,290		$ 26,290				45,173
Impairment losses	$ 14,800		$ 14,800
Pacific Oak Opportunity Zone Fund I (3)
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property	3		3
Ownership percentage	46.00%		46.00%
Investment balance	$ 26,219		$ 26,219				$ 25,669