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Real Estate Dispositions (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Amounts classified as held for sale in consolidated balance sheets  
Real estate, net $ 235,674
Other assets 3,046
Assets held for sale0238,720
Property debt 166,171
Other liabilities 1,858
Liabilities related to assets held for sale$ 0$ 168,029