XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.26.1

FAIR VALUE OF DERIVATIVES AND FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Asset Derivatives designated as hedging instruments, Fair Value | $ 1,071 | $ 272
Debt instruments - fair value |  |
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership | 819,753 | 859,966
Transfers between levels of fair value hierarchy | 0 |
Carrying Amount | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Notes receivable | 153,564 | 149,979
Total assets | 155,733 | 151,730
Debt instruments - fair value |  |
Total liabilities | 5,682,994 | 5,842,034
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership | 819,753 | 859,966
Carrying Amount | Equity Securities | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Equity securities | 1,098 | 1,479
Carrying Amount | Interest rate products | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Asset Derivatives designated as hedging instruments, Fair Value | 1,071 | 272
Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Notes receivable | 153,320 | 144,160
Total assets | 155,489 | 145,911
Debt instruments - fair value |  |
Total liabilities | 5,312,085 | 5,487,211
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership | 819,753 | 859,966
Estimate of Fair Value | Equity Securities | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Equity securities | 1,098 | 1,479
Estimate of Fair Value | Interest rate products | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Asset Derivatives designated as hedging instruments, Fair Value | 1,071 | 272
Estimate of Fair Value | Level 1 | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Total assets | 1,098 | 1,479
Estimate of Fair Value | Level 1 | Equity Securities | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Equity securities | 1,098 | 1,479
Estimate of Fair Value | Level 2 | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Total assets | 1,071 | 272
Debt instruments - fair value |  |
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership | 819,753 | 859,966
Estimate of Fair Value | Level 2 | Interest rate products | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Asset Derivatives designated as hedging instruments, Fair Value | 1,071 | 272
Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis |  |
Notes receivable | 153,320 | 144,160
Total assets | 153,320 | 144,160
Debt instruments - fair value |  |
Total liabilities | 5,312,085 | 5,487,211
Unsecured Debt | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 4,406,214 | 4,406,646
Unsecured Debt | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 4,078,914 | 4,092,949
Unsecured Debt | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 4,078,914 | 4,092,949
Unsecured Debt | Revolving Credit Facility | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 135,000 |
Unsecured Debt | Revolving Credit Facility | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 135,000 |
Unsecured Debt | Revolving Credit Facility | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 135,000 |
Unsecured Debt | Working Capital Credit Facility | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 9,553 | 26,381
Unsecured Debt | Working Capital Credit Facility | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 9,553 | 26,381
Unsecured Debt | Working Capital Credit Facility | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 9,553 | 26,381
Unsecured Debt | Commercial Paper | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 170,000 | 445,000
Unsecured Debt | Commercial Paper | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 170,000 | 445,000
Unsecured Debt | Commercial Paper | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 170,000 | 445,000
Fixed Rate Debt | Secured Debt | Mortgages loans | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 935,227 | 937,007
Fixed Rate Debt | Secured Debt | Mortgages loans | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 891,618 | 895,881
Fixed Rate Debt | Secured Debt | Mortgages loans | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 891,618 | 895,881
Variable Rate Debt | Secured Debt | Tax-exempt secured notes payable | Carrying Amount | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | Secured Debt | Tax-exempt secured notes payable | Estimate of Fair Value | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | Secured Debt | Tax-exempt secured notes payable | Estimate of Fair Value | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | $ 27,000 | $ 27,000

X
- Definition Fair Value Assets Measured On Recurring Basis. + References No definition available. + Details
Name: | udr_FairValueAssetsMeasuredOnRecurringBasisAbstract
Namespace Prefix: | udr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of transfers between levels of fair value hierarchy. + References No definition available. + Details
Name: | udr_TransfersBetweenLevelsFairValueHierarchy
Namespace Prefix: | udr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D + 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, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
Name: | us-gaap_NotesReceivableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479887/480-10-S45-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3A -Subparagraph (24) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A + Details
Name: | us-gaap_RedeemableNoncontrollingInterestEquityCommonCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_InterestRateContractMember
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_FairValueInputsLevel1Member
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: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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