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LEASES (UNITED DOMINION REALTY, L.P.) - Lessee Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Lessee operating leases |  |
Contractual ground lease expense | $ 100 | $ 100
Variable ground lease expense | 100 | 200
Operating lease right-of-use asset amortization | 800 | 200
Operating lease liabilities amortization | 700 | 100
Ground Leases |  |
Lessee operating leases |  |
Contractual ground lease expense | 3,170 | 2,159
Variable ground lease expense | 43 | 139
United Dominion Realty L.P. |  |
Lessee operating leases |  |
Contractual ground lease expense | 100 | 100
Total lease expense | 3,249 | 2,279
Operating lease right-of-use asset amortization | 900 |
Operating lease liabilities amortization | 900 |
United Dominion Realty L.P. | Ground Leases |  |
Lessee operating leases |  |
Contractual ground lease expense | 3,170 | 2,140
Variable ground lease expense | 43 | 139
Total lease expense | 3,213 | $ 2,279
United Dominion Realty L.P. | Equipment Leases |  |
Lessee operating leases |  |
Total lease expense | $ 36 |

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- Definition Amount of amortization expense attributable to operating lease liabilities. + References No definition available. + Details
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- Definition Amount of amortization expense attributable to right-of-use asset from operating lease. + References No definition available. + Details
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- Definition Amount of lease cost recognized by lessee for lease contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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