SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	1 Months Ended	9 Months Ended			1 Months Ended		9 Months Ended			9 Months Ended
	Jan. 31, 2012	Sep. 30, 2012 item	Sep. 30, 2011	Dec. 31, 2011	Jan. 31, 2012 Class A units	Jan. 03, 2012 Class A units	Sep. 30, 2012 Minimum	Sep. 30, 2012 Minimum Cash and cash equivalents	Sep. 30, 2012 Maximum	Sep. 30, 2012 Maximum Cash and cash equivalents	Sep. 30, 2012 Investment Properties/Joint Venture item	Sep. 30, 2012 Investment Properties/Joint Venture Minimum	Sep. 30, 2012 Investment Properties/Joint Venture Maximum
Principles of Consolidation
Ownership interest in each subsidiary (as a percent)							99.67%		100.00%
Number of limited liability companies											9
Percentage of ownership in Joint Ventures												40.00%	50.00%
Revenue Recognition
Period for which arrears are charged against income		60 days
Segment Reporting
Number of segments		1
Income Per Depositary Receipt
Forward split of depositary receipts	3
Exchange ratio of depositary receipts for partnership units before adjustment					10
Exchange ratio of depositary receipts for partnership units after adjustment					30
Number of units in each depository receipt						0.03333
Concentration of Credit Risks and Financial Instruments
Interest rate on interest bearing accounts (as a percent)								0.01%		0.45%
Federally uninsured amounts of cash and cash equivalents, and security deposits included in prepaid expenses and other assets		$ 6,243,000		$ 5,051,000
Advertising Expense
Advertising expense		$ 43,190	$ 59,997
Interest Capitalized
Criteria of capitalization of interest on property based on specified period of construction							1 year