RENTAL INCOME (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 sqft item	Dec. 31, 2011	Dec. 31, 2010
RENTAL INCOME
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	90.00%
Maximum period of non-cancellable operating lease	1 year
Percentage of rental income related to commercial properties	10.00%
Minimum future rental income
2013	$ 2,384,000
2014	2,011,000
2015	1,583,000
2016	1,165,000
2017	485,000
Thereafter	775,000
Commercial Property Leases	8,403,000
Aggregate contingent rentals from continuing operations	661,000	633,000	653,000
RENTAL INCOME
Annual base rent for expiring leases	2,754,312
Total square feet for expiring leases	110,805
Total number of leases expiring	43
Percentage of annual base rent for expiring leases	100.00%
Allowance for doubtful rent receivable	381,000	448,000
Recognizing rental income from non-cancelable commercial leases with future rental increases on a straight-line basis	268,000
Deferred rental concession	25,000
Amortization of deferred rents	4,100
Through December 31, 2013
RENTAL INCOME
Annual base rent for expiring leases	470,463
Total square feet for expiring leases	23,773
Total number of leases expiring	11
Percentage of annual base rent for expiring leases	17.00%
Through December 31, 2014
RENTAL INCOME
Annual base rent for expiring leases	588,422
Total square feet for expiring leases	29,523
Total number of leases expiring	10
Percentage of annual base rent for expiring leases	22.00%
Through December 31, 2015
RENTAL INCOME
Annual base rent for expiring leases	266,098
Total square feet for expiring leases	8,471
Total number of leases expiring	8
Percentage of annual base rent for expiring leases	10.00%
Through December 31, 2016
RENTAL INCOME
Annual base rent for expiring leases	593,346
Total square feet for expiring leases	27,073
Total number of leases expiring	3
Percentage of annual base rent for expiring leases	22.00%
Through December 31, 2017
RENTAL INCOME
Annual base rent for expiring leases	448,101
Total square feet for expiring leases	11,997
Total number of leases expiring	6
Percentage of annual base rent for expiring leases	16.00%
Through December 31, 2018
RENTAL INCOME
Annual base rent for expiring leases	58,050
Total square feet for expiring leases	1,262
Total number of leases expiring	1
Percentage of annual base rent for expiring leases	2.00%
Through December 31, 2019
RENTAL INCOME
Annual base rent for expiring leases	200,375
Total square feet for expiring leases	5,800
Total number of leases expiring	2
Percentage of annual base rent for expiring leases	7.00%
Through December 31, 2020
RENTAL INCOME
Annual base rent for expiring leases	64,657
Total square feet for expiring leases	1,106
Total number of leases expiring	1
Percentage of annual base rent for expiring leases	2.00%
Through December 31, 2021
RENTAL INCOME
Annual base rent for expiring leases	64,800
Total square feet for expiring leases	1,800
Total number of leases expiring	1
Percentage of annual base rent for expiring leases	2.00%
Through December 31, 2022
RENTAL INCOME
Annual base rent for expiring leases	$ 0
Percentage of annual base rent for expiring leases	0.00%