SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Segment revenues and net operating income [Abstract]
REVENUE	$ 45,608	$ 43,035
Property operating expenses, including real estate taxes	20,036
Net operating income	25,572	23,768
Casualty gain (loss)	(641)	(50)
Depreciation and amortization	(18,111)	(20,516)
General and administrative expenses	(3,806)	(3,619)
Interest expense	(7,896)	(8,296)
Loss on extinguishment of debt	(2)	(121)
Interest and other income	424	689
Income (loss) before gain (loss) on sale of real estate and other investments and income (loss) from discontinued operations	(6,014)	(9,522)
Gain (loss) on sale of real estate and other investments	54	2,304
Income (loss) from continuing operations	(5,960)	(7,218)
Income (loss) from discontinued operations	0	13,882
NET INCOME (LOSS)	(5,960)	6,664
Segment assets
Property owned	1,673,158		$ 1,627,636
Less accumulated depreciation	(371,672)		(353,871)
Total property owned	1,301,486		1,273,765
Cash and cash equivalents	23,329	24,422	13,792
Restricted cash	4,819	4,053	5,464
Other assets	29,166		27,265
Unimproved land	2,252		5,301
Mortgage loans receivable	10,260		10,410
TOTAL ASSETS	1,371,312		1,335,997
Operating Segments | Multifamily
Segment revenues and net operating income [Abstract]
REVENUE	44,814	40,054
Property operating expenses, including real estate taxes	19,688
Net operating income	25,126	21,926
Segment assets
Property owned	1,628,195		1,582,917
Less accumulated depreciation	(357,420)		(340,081)
Total property owned	1,270,775		1,242,836
Operating Segments | All Other
Segment revenues and net operating income [Abstract]
REVENUE	794	2,981
Property operating expenses, including real estate taxes	348
Net operating income	446	1,842
Segment assets
Property owned	44,963		44,719
Less accumulated depreciation	(14,252)		(13,790)
Total property owned	30,711		$ 30,929
Real Estate
Segment revenues and net operating income [Abstract]
Property management		(19,267)
Real Estate | Operating Segments | Multifamily
Segment revenues and net operating income [Abstract]
Property management		(18,128)
Real Estate | Operating Segments | All Other
Segment revenues and net operating income [Abstract]
Property management		(1,139)
Management Service
Segment revenues and net operating income [Abstract]
Property management	$ (1,554)	$ (1,377)