RENTAL INCOME (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
RENTAL INCOME
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	93.00%
Maximum period of non-cancelable operating lease	1 year
Percentage of rental income related to commercial properties	7.00%
Minimum future rental income
2017	$ 2,692,000
2018	2,467,000
2019	1,988,000
2020	1,525,000
2021	1,083,000
Thereafter	614,000
Commercial Property Leases	10,369,000
Aggregate contingent rentals from continuing operations	$ 616,000	$ 683,000	$ 638,000