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Discontinued Operations And Land Dispositions (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2012 property	Sep. 30, 2011	Oct. 12, 2012 Homburg Invest Inc [Member] property	Sep. 30, 2012 Homburg Invest Inc [Member]	Sep. 30, 2012 Properties Held For Sale/Conveyance [Member] property	Oct. 12, 2012 Meadows Marketplace And Fieldstone Marketplace [Member] property	Sep. 30, 2012 HII Joint Venture [Member] property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment (charges)/reversals, net	$ (64,671,000)	$ 1,138,000	$ (87,287,000)
Mortgage loans payable and accrued interest for properties under conveyance process		23,300,000
Number of properties		67		7		17	2	9
Ownership percentage					80.00%		100.00%	20.00%
Number of properties in process of conveying		4
Value of ownership interest				23,600,000			27,300,000
Assumption of mortgage financing related to the exchange agreement							21,800,000
Mortgage financing transferred				$ 14,500,000

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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

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