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Unconsolidated Entities (UNITED DOMINION REALTY, L.P.) Unconsolidated Entities (UNITED DOMINION REALTY, L.P.) (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition, Pro Forma Net Income (Loss) | $ 319,385 | $ 105,875
United Dominion Reality L.P. |  |
Business Acquisition Pro Forma Net Income (Loss) from Equity Method Investments | (12,006) | (26,511)
Business Acquisition, Pro Forma Net Income (Loss) | $ 205,954 | $ 69,716

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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