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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 | ||||||||||||