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Investments in Real Estate (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012 Number	Apr. 29, 2011 Number
Investments in Real Estate (Textual) [Abstract]
Number of units located with multifamily properties	1,812	6
Number of multifamily property owned	7
Contribution value of the initial portfolio		$ 103,790
Limited partner interests issued for acquisition of the initial portfolio		39,215
Limited partner units issued for acquisition of the initial portfolio		3,921,500
Additional Limited partner interests Value		$ 1,250
Additional Limited partner units		125,000

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Additional Limited partner interests Value.

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Additional Limited partner units.

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Contribution value of the initial portfolio.

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Limited partner interests issued for acquisition of the initial portfolio.

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Limited partner units issued for acquisition of the initial portfolio.

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The number of real estate properties owned as of the balance sheet date.

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The number of units in a real estate property owned as of the balance sheet date.

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