Investment in Unconsolidated Ventures (Details Textuals) (USD $)	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Additional Investment In Unconsolidated Ventures (Textuals) [Abstract]
Investment in real estate ventures, at equity	$ 82,927,000	$ 84,372,000
Area of undeveloped parcel of land (in acres) owned by a Real Estate Venture	3
Unconsolidated real estate ventures [Member]
Additional Investment In Unconsolidated Ventures (Textuals) [Abstract]
Investment in real estate ventures, at equity	82,927,000	84,372,000
Guaranteed repayment of loans on behalf of a certain Real Estate Venture	700,000
Income from Real estate venture	$ 600

Additional Investment In Unconsolidated Ventures.

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- Definition

Area owned by Real estate venture of undeveloped parcel of land (in acres).

+ Details

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- Definition

This item represents the amount of gain or loss arising from the disposal of an equity method investment.

+ Details

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment losses recognized.

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 13
-Subparagraph c

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