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Organization: (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2013 entity | Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Ownership interest in operating partnership (as a percent) | 94.00% | 93.00%
Number of management companies (in entities) | 7 |

X
- Definition Represents the number of management companies through which the entity provides property management, leasing and redevelopment for its real estate portfolio. + References No definition available. + Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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- Details
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