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REAL ESTATE OWNED (UNITED DOMINION REALTY, L.P.) - Summary (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Real estate owned |  |
Land | $ 2,164,032 | $ 1,849,799
Depreciable property - held and used: |  |
Land Improvements | 224,964 | 213,224
Building, improvements, and furniture, fixtures and equipment | 10,102,758 | 8,133,136
Under development: |  |
Real estate under development (net of accumulated depreciation of $23 and $0, respectively) | 69,754 |
Real estate owned | 12,602,101 | 10,196,159
Accumulated depreciation | (4,131,353) | (3,654,160)
Total real estate owned, net of accumulated depreciation | 8,470,748 | 6,541,999
United Dominion Realty L.P. |  |
Real estate owned |  |
Land | 711,256 | 711,256
Depreciable property - held and used: |  |
Land Improvements | 96,864 | 92,000
Building, improvements, and furniture, fixtures and equipment | 3,067,040 | 3,008,729
Under development: |  |
Real estate owned | 3,875,160 | 3,811,985
Accumulated depreciation | (1,796,568) | (1,658,161)
Total real estate owned, net of accumulated depreciation | $ 2,078,592 | $ 2,153,824

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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://fasb.org/us-gaap/role/ref/legacyRef -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=119400593&loc=d3e572229-122910 + Details
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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6812-107765 + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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