XML 133 R106.htm IDEA: XBRL DOCUMENT
v3.20.1

FAIR VALUE OF DERIVATIVES AND FINANCIAL INSTRUMENTS (UNITED DOMINION REALTY, L.P.) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Debt instruments - fair value |  |
Transfer between the levels | $ 0 |
Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Total liabilities | 4,913,746 | $ 4,731,595
Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 4,907,068 | 4,853,337
Level 2 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 3,075 | 142
Level 3 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 4,903,993 | 4,853,195
United Dominion Realty L.P. | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Total liabilities | 99,500 | 99,500
United Dominion Realty L.P. | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 100,663 | 98,976
United Dominion Realty L.P. | Mortgages Note Payable | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Fair value |  | 72,500
United Dominion Realty L.P. | Mortgages Note Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value |  | 71,976
United Dominion Realty L.P. | Level 3 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 100,663 | 98,976
United Dominion Realty L.P. | Level 3 | Mortgages Note Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value |  | 71,976
Fixed Rate Debt | United Dominion Realty L.P. | Mortgages Note Payable | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Fair value | 72,500 |
Fixed Rate Debt | United Dominion Realty L.P. | Mortgages Note Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 73,663 |
Fixed Rate Debt | United Dominion Realty L.P. | Level 3 | Mortgages Note Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 73,663 |
Variable Rate Debt | United Dominion Realty L.P. | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | United Dominion Realty L.P. | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | United Dominion Realty L.P. | Level 3 | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | $ 27,000 | $ 27,000

X
- Definition Fair value transfers between the levels. + References No definition available. + Details
Name: | udr_TransferBetweenLevels
Namespace Prefix: | udr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
Name: | us-gaap_DebtInstrumentFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DebtInstrumentFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=udr_FixedRateDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=udr_VariableRateDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=udr_TaxExemptNotesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |