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Investments in Joint Ventures (Aggregate Balance Sheet and Statement of Income Data for Unconsolidated Joint Ventures) (Details) (USD $)

3 Months Ended

6 Months Ended

Jun. 30, 2011

Jun. 30, 2010

Jun. 30, 2011

Jun. 30, 2010

Dec. 31, 2010

Investments in Joint Ventures

Total assets

$ 1,314,900,000

^[1]

$ 1,314,900,000

^[1]

$ 935,300,000

Total third-party debt

1,049,400,000

^[1]

1,049,400,000

^[1]

810,100,000

Total equity

240,800,000

^[1]

240,800,000

^[1]

105,300,000

Total revenues

36,400,000

34,500,000

69,400,000

68,200,000

Net loss

(3,800,000)

(5,100,000)

(6,400,000)

(10,200,000)

Equity in income (loss)

$ 16,000

^[2]

$ (436,000)

^[2]

$ 390,000

^[2]

$ (541,000)

^[2]

Number of unconsolidated joint ventures ownership interest sold

3

Number of multifamily properties acquired by discretionary funds

12

12

[1]	During the six months ended June 30, 2011, we sold our ownership interest in three unconsolidated joint ventures and our discretionary funds (the "Funds") acquired twelve multifamily properties.
[2]	Equity in income (loss) excludes our ownership interest of fee income from various property management services with our joint ventures.

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Number Of Ownership Interest Sold In Joint Ventures

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This item represents the disclosure of summarized financial information for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for using the equity method of accounting. If investments in common stock of corporate joint ventures or other investments accounted for under the equity method are, in the aggregate, material in relation to the financial position or results of operations of an investor, it may be necessary to present summarized information as to assets of the investee, or group of investments for which combined disclosure is appropriate, either by individual financial statement caption or in groups, as appropriate. Such summarized financial information may, at a minimum, include current and noncurrent assets, the total of which components are represented herein.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph w
-Article 1

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-Number 210
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-Paragraph g
-Subparagraph 1, 2
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-Name Accounting Principles Board Opinion (APB)
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-Publisher SEC
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-Publisher SEC
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-Paragraph w
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-Publisher SEC
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-Number 210
-Section 02
-Paragraph w
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
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-Subparagraph 1, 2
-Article 4

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 18
-Subparagraph f

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph d

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This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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