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           Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Mar. 31, 2013 
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           Dec. 31, 2012 
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|---|---|---|
| Investments In Unconsolidated Joint Ventures [Abstract] | ||
| Rental property, net | $ 442,346 | $ 179,824 | 
| Loan receivable | 42,953 | 42,276 | 
| Other assets | 351,312 | 311,846 | 
| Total assets | 836,611 | 533,946 | 
| Mortgages and loans payable | 344,095 | 168,908 | 
| Other liabilities | 13,115 | 12,203 | 
| Partners'/members' capital (deficit) | 479,401 | 352,835 | 
| Total liabilities and partners'/members' capital | $ 836,611 | $ 533,946 | 
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- Definition 
          Equity Method Investment Summarized Financial Information Loans Receivable No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Other Assets No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Other Liabilities No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Rental Property, Net No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Secured Debt No definition available. 
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- Details 
          
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- Definition 
          The amount of assets reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of equity, excluding noncontrolling interest, attributable to the equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of liabilities and equity reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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