OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Rental and other property revenues	$ 31,607	$ 31,302	$ 62,689	$ 62,837
Property operating expenses	(15,492)	(15,210)	(29,947)	(31,099)
Depreciation and amortization	(6,522)	(6,378)	(12,968)	(12,681)
Segment operating (loss) income	4,641	5,842	9,829	11,040
Real estate assets	1,009,081	920,829	1,009,081	920,829
Commercial Properties [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues	7,404	8,267	14,959	17,138
Property operating expenses	(4,238)	(4,694)	(7,986)	(9,377)
Depreciation and amortization	(2,323)	(2,348)	(4,616)	(4,604)
Mortgage and loan interest	(1,893)	(2,121)	(3,742)	(3,727)
Segment operating (loss) income	(1,050)	(896)		(570)
Capital expenditures		555	2,725	1,898
Real estate assets	135,294	146,621	135,294	146,621
Property Sales
Sales price	2,313		2,313
Cost of sale	(2,313)		(2,313)
Apartments [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues	24,201	23,030	47,726	45,691
Property operating expenses	(11,199)	(10,211)	(21,782)	(20,956)
Depreciation and amortization	(4,195)	(4,030)	(8,344)	(8,077)
Mortgage and loan interest	(5,342)	(5,028)	(10,798)	(11,787)
Segment operating (loss) income	3,465	3,761	6,802	4,871
Capital expenditures	2,092
Real estate assets	764,672	656,455	764,672	656,455
Property Sales
Sales price			8,512
Cost of sale			(8,512)
Land [Member]
Segment Reporting Information [Line Items]
Property operating expenses	(55)	(155)	(84)	(314)
Mortgage and loan interest	148	(310)	36	(860)
Gain on land sales			1,335
Loss on land sales		(476)		(31)
Segment operating (loss) income	93	(941)	1,287	(1,205)
Capital expenditures		186		585
Real estate assets	108,467	117,753	108,467	117,753
Property Sales
Sales price		507	2,984	1,596
Cost of sale		(983)	(1,649)	(1,627)
Gain (loss) on sale		(476)	1,335	(31)
Other [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues	2	5	4	8
Property operating expenses		(150)	(95)	(452)
Depreciation and amortization	(4)		(8)
Mortgage and loan interest	(7,088)	(8,324)	(13,764)	(14,599)
Interest income	3,544	3,709	7,420	7,130
Segment operating (loss) income	(3,546)	(4,760)	(6,443)	(7,913)
Real estate assets	648		648
Total Segments [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues	31,607	31,302	62,689	62,837
Property operating expenses	(15,492)	(15,210)	(29,947)	(31,099)
Depreciation and amortization	(6,522)	(6,378)	(12,968)	(12,681)
Mortgage and loan interest	(14,175)	(15,783)	(28,268)	(30,973)
Interest income	3,544	3,709	7,420	7,130
Gain on land sales			1,335
Loss on land sales		(476)		(31)
Segment operating (loss) income	(1,038)	(2,836)	261	(4,817)
Capital expenditures	2,092	741	2,725	2,483
Real estate assets	1,009,081	920,829	1,009,081	920,829
Property Sales
Sales price	2,313	507	13,809	1,596
Cost of sale	$ (2,313)	(983)	(12,474)	(1,627)
Gain (loss) on sale		$ (476)	$ 1,335	$ (31)