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Investments In Joint Ventures (Narrative) (Details) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2012 | Jun. 30, 2012 acre | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | Mar. 31, 2012 Raleigh North Carolina [Member] | Mar. 31, 2012 Orange County Florida [Member] acre | Jun. 30, 2012 Minimum [Member] | Jun. 30, 2012 Maximum [Member]
Number of joint ventures accounted for under equity method investments |  |  |  | 5 |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  |  | 20.00% |  |  | 15.00% | 50.00%
Maximum guaranteed amount of loans utilized for construction and development activities for joint ventures |  | $ 0 |  | $ 0 |  |  |  |  |  |
Fees earned for property and asset management, construction, development, and other services to joint ventures |  | $ 3,300,000 | $ 2,400,000 | $ 6,100,000 | $ 3,900,000 |  |  |  |  |
Number of units in multifamily properties acquired | 223 | 477 |  |  |  |  | 350 |  |  |
Acres of land acquired |  | 4.7 |  |  |  |  |  | 15.0 |  |

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- Definition Number of apartment units in properties acquired during the period by our discretionary funds (unconsolidated joint ventures). + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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