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RENTAL INCOME (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 sqft item	Mar. 31, 2012	Dec. 31, 2012
RENTAL INCOME
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	91.00%
Maximum period of non-cancellable operating lease	1 year
Percentage of rental income related to commercial properties	9.00%
Minimum future rental income
2014	$ 2,294,000
2015	1,926,000
2016	1,528,000
2017	1,094,000
2018	432,000
Thereafter	679,000
Commercial Property Leases	7,953,000
Aggregate contingent rentals from continuing operations	175,000	156,000
RENTAL INCOME
Annual base rent for expiring leases	2,401,138
Total square feet for expiring leases	91,275
Total number of leases expiring	37
Percentage of Annual base rent for expiring leases	100.00%
Allowance for doubtful rent receivable	449,000		381,000
Recognizing rental income from non-cancelable commercial leases with future rental increases on a straight-line basis	194,000
Deferred rental concession	27,000
Amortization of deferred rents	550
Through December 31, 2014
RENTAL INCOME
Annual base rent for expiring leases	117,290
Total square feet for expiring leases	4,243
Total number of leases expiring	5
Percentage of Annual base rent for expiring leases	5.00%
Through December 31, 2015
RENTAL INCOME
Annual base rent for expiring leases	664,999
Total square feet for expiring leases	32,537
Total number of leases expiring	13
Percentage of Annual base rent for expiring leases	28.00%
Through December 31, 2016
RENTAL INCOME
Annual base rent for expiring leases	189,521
Total square feet for expiring leases	5,457
Total number of leases expiring	5
Percentage of Annual base rent for expiring leases	8.00%
Through December 31, 2017
RENTAL INCOME
Annual base rent for expiring leases	657,732
Total square feet for expiring leases	29,023
Total number of leases expiring	4
Percentage of Annual base rent for expiring leases	27.00%
Through December 31, 2018
RENTAL INCOME
Annual base rent for expiring leases	383,715
Total square feet for expiring leases	10,047
Total number of leases expiring	5
Percentage of Annual base rent for expiring leases	16.00%
Through December 31, 2019
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, 2020
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	8.00%
Through December 31, 2021
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	3.00%
Through December 31, 2022
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	3.00%
Through December 31, 2023
RENTAL INCOME
Annual base rent for expiring leases	$ 0
Total square feet for expiring leases	0
Total number of leases expiring	0
Percentage of Annual base rent for expiring leases	0.00%

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- Definition

Represents the amount of allowance for doubtful accounts related to rents receivable.

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- Definition

Represents the amount of annual rent to be receivable for leases to be expired.

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No definition available.

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Represents the deferred rental concessions on real estate properties.

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Represents the maximum period of non-cancellable operating leases.

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Represents the percentage of rental income related to commercial real estate property.

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Represents the percentage of rental income related to residential real estate property.

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Represents the amount resulting from recognizing rental income from non-cancelable commercial leases with future rental increases on a straight-line basis, which is included in rents receivable.

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

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Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

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Amount of contingent rental revenue recognized for the period under lease, based on the occurrences of an event or condition.

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