XML 95 R121.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

REAL ESTATE OWNED (UNITED DOMINION REALTY, L.P.) - Other Information (Details) $ in Millions | 1 Months Ended |
--- | --- | ---
Feb. 28, 2019 USD ($) item | Dec. 31, 2018 USD ($) item | Feb. 28, 2018 USD ($) home | Dec. 31, 2017 USD ($) community | Dec. 31, 2019 state home community
Real estate properties |  |  |  |  |
Number of apartment homes owned and consolidated | home |  |  |  |  | 47,010
Number of real estate properties | community |  |  |  |  | 148
Number of states in which there are owned and consolidated communities | state |  |  |  |  | 13
United Dominion Realty L.P. |  |  |  |  |
Real estate properties |  |  |  |  |
Number of apartment homes owned and consolidated | home |  |  |  |  | 16,434
Number of real estate properties | community |  |  |  |  | 52
Number of states in which there are owned and consolidated communities | state |  |  |  |  | 9
Orange County and Carlsbad Properties |  |  |  |  |
Real estate properties |  |  |  |  |
Apartment homes sold | community |  |  |  | 218 |
Net proceeds from sale of properties |  |  |  | $ 69.0 |
Gain on sale of real estate owned |  |  |  | $ 41.3 |
ORANGE COUNTY, CA |  |  |  |  |
Real estate properties |  |  |  |  |
Apartment homes sold | item | 264 |  |  |  |
Net proceeds from sale of properties | $ 90.5 |  |  |  |
Gain on sale of real estate owned | $ 70.3 |  |  |  |
ORANGE COUNTY, CA | United Dominion Realty L.P. |  |  |  |  |
Real estate properties |  |  |  |  |
Apartment homes sold | home |  |  | 264 |  |
Net proceeds from sale of properties |  |  | $ 90.5 |  |
Gain on sale of real estate owned |  |  | $ 70.3 |  |
Fairfax, VA |  |  |  |  |
Real estate properties |  |  |  |  |
Apartment homes sold | item |  | 604 |  |  |
Net proceeds from sale of properties |  | $ 160.0 |  |  |
Gain on sale of real estate owned |  | 65.9 |  |  |
Fairfax, VA | United Dominion Realty L.P. |  |  |  |  |
Real estate properties |  |  |  |  |
Gross proceeds from sale of properties |  | 9.3 |  |  |
Gain on sale of real estate owned |  | $ 5.2 |  |  |

X
- Definition Apartment homes sold. + References No definition available. + Details
Name: | udr_ApartmentHomesSold
Namespace Prefix: | udr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | udr_DisposalGroupIncludingDiscontinuedOperationGrossConsideration
Namespace Prefix: | udr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Apartment Homes Owned And Consolidated By Company + References No definition available. + Details
Name: | udr_NumberOfApartmentHomesOwnedAndConsolidatedByCompany
Namespace Prefix: | udr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=117337411&loc=d3e23528-158515 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117337397&loc=d3e23439-158514 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117337397&loc=d3e23415-158514 + Details
Name: | us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=udr_UnitedDominionRealityLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=udr_OrangeCountyAndCarlsbadPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=udr_OrangeCountyCaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=udr_FairfaxVaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |