| 
           Properties, net (Details 4) (USD $) 
        In Thousands  | 
        
           Jun. 30, 2011 
         | 
      
|---|---|
| Properties | |
| Less: accumulated depreciation | $ (6,791) | 
| Properties held for sale, net | 75,107 | 
| 
           Land, operating properties 
         | 
        |
| Properties | |
| Properties held for sale, gross | 10,343 | 
| 
           Land, development. 
         | 
        |
| Properties | |
| Properties held for sale, gross | 5,599 | 
| 
           Buildings and improvements 
         | 
        |
| Properties | |
| Properties held for sale, gross | 43,022 | 
| 
           Construction in progress, excluding land 
         | 
        |
| Properties | |
| Properties held for sale, gross | $ 22,934 | 
| X | ||||||||||
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- Definition 
          The cumulative amount of depreciation for real estate property held for sale. 
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| X | ||||||||||
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- Definition 
          Gross carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be an inventory of the entity. 
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| X | ||||||||||
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- Definition 
          Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. 
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| X | ||||||||||
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- Definition 
          Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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