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Organization (Details) | Dec. 31, 2011 state Property
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Organization |
Number of properties owned | 369
Number of states in which properties are located | 38

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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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Balance Type: | na
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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
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