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SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) | 3 Months Ended | 0 Months Ended |  | 3 Months Ended |  | 3 Months Ended |
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Mar. 31, 2013 item | Mar. 31, 2012 | Jan. 03, 2012 Class A units | Aug. 20, 2007 Class A units | Mar. 31, 2013 Minimum | Mar. 31, 2013 Minimum Cash and cash equivalents | Mar. 31, 2013 Maximum | Mar. 31, 2013 Maximum Cash and cash equivalents | Mar. 31, 2013 Investment Properties/Joint Venture item | Mar. 31, 2013 Investment Properties/Joint Venture Minimum | Mar. 31, 2013 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 |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Provision for income taxes | $ 0 |  |  |  |  |  |  |  |  |  |
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 | 0.1 |  |  |  |  |  |  |
Income Per Unit |  |  |  |  |  |  |  |  |  |  |
Dilutive units | 0 |  |  |  |  |  |  |  |  |  |
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 | 4,393,000 | 5,604,000 |  |  |  |  |  |  |  |  |
Advertising Expense |  |  |  |  |  |  |  |  |  |  |
Advertising expense | 11,535 | 22,737 |  |  |  |  |  |  |  |  |
Interest Capitalized |  |  |  |  |  |  |  |  |  |  |
Criteria of capitalization of interest on property based on specified period of construction |  |  |  |  | 1 year |  |  |  |  |  |
Capitalized interest | $ 0 | $ 0 |  |  |  |  |  |  |  |  |

X
- Definition The number of underlying shares represented by one American Depository Receipt (ADR) or Global Depository Receipt (GDR). A value of "3" means that one ADR represents 3 underlying shares. If one underlying share represents 2 ADR's then the value would be represented as "0.5". + References No definition available. + Details
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- Definition The interest rate for investments that have an interest rate. For fixed rate investments, this indicates the fixed interest rate. If the investment has a variable interest rate, the rate stated here may be the rate that is currently relevant. In this case the "Investment, Interest Rate is Current Rate for Variable Rate Investment Flag", "Investment, Interest Rate is Discount Rate at Purchase Flag", "Investment, Interest Rate Reflects Current Yield Flag" should be used. If one of these flags are not appropriate to explain the interest rate that is indicated, then a new flag should be added or an explanation should be included in "Investment, Additional Information". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
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