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Investments In Unconsolidated Joint Ventures (Narrative) (Details) (USD $)
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3 Months Ended | ||||||||||||
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Mar. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2013
Unconsolidated Joint Venture Office Buildings [Member]
property
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Mar. 31, 2013
Unconsolidated Joint Venture Retail Buildings [Member]
sqft
property
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Mar. 31, 2013
Unconsolidated Joint Venture Multi-Family Properties [Member]
item
property
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Mar. 31, 2013
Unconsolidated Joint Venture Hotel [Member]
item
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Mar. 31, 2013
Unconsolidated Joint Venture Commercial Property [Member]
sqft
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Mar. 31, 2013
Unconsolidated Joint Venture Development Projects [Member]
item
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Mar. 31, 2013
Unconsolidated Joint Venture Land Parcels [Member]
sqft
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Mar. 31, 2013
Minimum [Member]
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Mar. 31, 2013
Maximum [Member]
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Mar. 31, 2013
Variable Interest Entity [Member]
property
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Mar. 31, 2013
Apartments [Member]
Unconsolidated Joint Venture Land Parcels [Member]
item
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| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Investments in unconsolidated joint ventures | $ 158,505,000 | $ 132,339,000 | $ 13,500,000 | ||||||||||
| Number of properties | 3 | 2 | 7 | ||||||||||
| Area of property (in square feet) | 400,000 | 1,700,000 | 1,200,000 | ||||||||||
| Number of units | 2,597 | 350 | 2,376 | 4,071 | |||||||||
| Area of mixed use project (in square feet) | 1,500,000 | ||||||||||||
| Percentage of interest in venture | 7.50% | 80.00% | |||||||||||
| Accounts receivable from unconsolidated joint ventures | 204,000 | 370,000 | |||||||||||
| Number of VIEs | 6 | ||||||||||||
| Maximum exposure to loss | 17,400,000 | ||||||||||||
| Estimated future funding commitments | $ 3,900,000 | ||||||||||||
| X | ||||||||||
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- Definition
Area Of Mixed Use Property No definition available.
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| X | ||||||||||
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- Definition
Number Of Variable Interest Entities No definition available.
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| X | ||||||||||
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- Definition
Variable Interest Entity, Entity Estimated Future Funding Commitments No definition available.
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| X | ||||||||||
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- Definition
Area of a real estate property. No definition available.
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| X | ||||||||||
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- Definition
For an unclassified balance sheet, amounts due from an entity in which the reporting entity shares joint control with another party or group. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of real estate properties owned as of the balance sheet date. No definition available.
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| X | ||||||||||
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- Definition
The number of units in a real estate property owned as of the balance sheet date. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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