OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Rental and other property revenues													$ 120,955	$ 125,233	$ 118,471
Property operating expenses													(59,420)	(63,056)	(61,918)
Depreciation													(22,761)	(25,558)	(23,683)
Segment operating income (loss)	$ 521	$ 5,771	$ 4,641	$ 5,188	$ 3,299	$ 5,766	$ 5,842	$ 5,198	$ 3,450	$ 4,347	$ 5,770	$ 4,080	16,121	20,105	17,647
Assets	384,504				979,870								384,504	979,870
Commercial Properties [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues													33,113	32,323	31,864
Property operating expenses													(16,558)	(17,724)	(19,476)
Depreciation													(9,530)	(9,200)	(8,924)
Mortgage and loan interest													(7,662)	(7,528)	(7,167)
Interest income
Recognition of deferred gain on sale of income - producing properties															(238)
Gain on land sales
Segment operating income (loss)													(637)	(2,129)	(3,941)
Capital expenditures													8,246	3,157	4,577
Assets	153,018				137,157				148,689				153,018	137,157	148,689
Property Sales
Sales price															1,500
Cost of sale															(1,738)
Gain (loss) on sale															(238)
Apartments [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues													87,832	92,807	86,603
Property operating expenses													(42,134)	(43,677)	(40,786)
Depreciation													(13,217)	(16,354)	(14,759)
Mortgage and loan interest													(20,671)	(22,346)	(25,381)
Recognition of deferred gain on sale of income - producing properties														9,842	16,445
Segment operating income (loss)													11,810	20,272	22,122
Capital expenditures													16,954	1,402	863
Assets	143,500				726,852				624,433				143,500	726,852	624,433
Property Sales
Sales price															20,350
Cost of sale															(3,905)
Recognized prior deferred gain														9,842
Gain (loss) on sale														9,842	16,445
Land [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues														87
Property operating expenses													(275)	(667)	(1,634)
Depreciation
Mortgage and loan interest													(318)	(1,588)	(1,746)
Gain on land sales													17,404	4,884	3,121
Segment operating income (loss)													16,811	2,716	(259)
Capital expenditures														609	269
Assets	84,016				115,205				118,051				84,016	115,205	118,051
Property Sales
Sales price													43,311	11,177	29,128
Cost of sale													(25,907)	(6,293)	(26,007)
Gain (loss) on sale													17,404	4,884	3,121
Other [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues													10	16	4
Property operating expenses													(453)	(988)	(22)
Depreciation													(14)	(4)
Mortgage and loan interest													(30,221)	(28,482)	(18,794)
Interest income													15,793	13,862	14,670
Segment operating income (loss)													(14,885)	(15,596)	(4,142)
Assets	3,970				656								3,970	656
Total Segments [Member]
Segment Reporting Information [Line Items]
Rental and other property revenues													120,955	125,233	118,471
Property operating expenses													(59,420)	(63,056)	(61,918)
Depreciation													(22,761)	(25,558)	(23,683)
Mortgage and loan interest													(58,872)	(59,944)	(53,088)
Interest income													15,793	13,862	14,670
Recognition of deferred gain on sale of income - producing properties														9,842	16,207
Gain on land sales													17,404	4,884	3,121
Segment operating income (loss)													13,099	5,263	13,780
Capital expenditures													25,200	5,168	5,709
Assets	$ 384,504				$ 979,870				$ 891,173				384,504	979,870	891,173
Property Sales
Sales price													43,311	11,177	50,978
Cost of sale													(25,907)	(6,293)	(31,650)
Recognized prior deferred gain														9,842
Gain (loss) on sale													$ 17,404	$ 14,726	$ 19,328