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Real Estate Owned (UNITED DOMINION REALTY, L.P.) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Summary of carrying amounts for real estate owned (at cost) |  |
Land | $ 1,919,597 | $ 1,980,221
Under development: |  |
Real estate under development (net of accumulated depreciation of $0 and $0, respectively) | 92,645 | 177,632
Real estate owned | 8,425,279 | 8,383,259
Less: accumulated depreciation | (2,557,949) | (2,434,772)
Real estate owned, net | 5,867,330 | 5,948,487
Land [Member] |  |
Under development: |  |
Real estate under development (net of accumulated depreciation of $0 and $0, respectively) | 78,085 | 24,584
Construction in progress [Member] |  |
Under development: |  |
Real estate under development (net of accumulated depreciation of $0 and $0, respectively) | 14,560 | 153,048
United Dominion Reality L.P. [Member] |  |
Summary of carrying amounts for real estate owned (at cost) |  |
Land | 1,006,651 | 1,008,014
Depreciable property - held and used: |  |
Building, improvements, and furniture, fixture and equipment | 3,232,344 | 3,230,756
Under development: |  |
Real estate owned | 4,238,995 | 4,238,770
Less: accumulated depreciation | (1,474,834) | (1,403,303)
Real estate owned, net | $ 2,764,161 | $ 2,835,467

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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount before accumulated deprecation and depletion of real estate held for productive use and additions or improvements to real estate held for productive use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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