XML 158 R133.htm IDEA: XBRL DOCUMENT v3.3.1.900

Fair Value of Derivatives and Financial Instruments (UNITED DOMINION REALTY, L.P.) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Carrying Amount | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	$ 16,707	$ 14,457
Secured debt instruments - variable rate
Total liabilities	3,590,829	3,593,473
Fair Value | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	16,951	14,896
Secured debt instruments - variable rate
Total liabilities	3,673,283	3,721,512
Fair Value | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	13	88
Derivatives - Interest rate contracts	2,112	10,368
Fair Value | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	448,019	415,663
Secured debt instruments - variable rate
Secured debt instruments - variable rate	31,337	31,337
Fair Value | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	94,700	94,700
Fair Value | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	539,050	606,623
Secured debt instruments - variable rate
Secured debt instruments - variable rate	299,378	266,196
Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	0	0
Secured debt instruments - variable rate
Total liabilities	0	0
Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivatives - Interest rate contracts	0	0
Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	13	88
Secured debt instruments - variable rate
Total liabilities	2,112	10,368
Fair Value | Significant Other Observable Inputs (Level 2) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	13	88
Derivatives - Interest rate contracts	2,112	10,368
Fair Value | Significant Other Observable Inputs (Level 2) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Significant Other Observable Inputs (Level 2) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Significant Other Observable Inputs (Level 2) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
Fair Value | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	16,938	14,808
Secured debt instruments - variable rate
Total liabilities	3,671,171	3,711,144
Fair Value | Significant Unobservable Inputs (Level 3) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivatives - Interest rate contracts	0	0
Fair Value | Significant Unobservable Inputs (Level 3) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	448,019	415,663
Secured debt instruments - variable rate
Secured debt instruments - variable rate	31,337	31,337
Fair Value | Significant Unobservable Inputs (Level 3) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	94,700	94,700
Fair Value | Significant Unobservable Inputs (Level 3) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	539,050	606,623
Secured debt instruments - variable rate
Secured debt instruments - variable rate	299,378	266,196
United Dominion Reality L.P.
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8	39
Derivatives - Interest rate contracts	0	918
United Dominion Reality L.P. | Carrying Amount | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	8	39
Secured debt instruments - variable rate
Total liabilities	478,163	932,877
United Dominion Reality L.P. | Carrying Amount | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8	39
Derivatives - Interest rate contracts		918
United Dominion Reality L.P. | Carrying Amount | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	30,132	378,371
United Dominion Reality L.P. | Carrying Amount | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	27,000	27,000
United Dominion Reality L.P. | Carrying Amount | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	250,828	333,828
Secured debt instruments - variable rate
Secured debt instruments - variable rate	170,203	192,760
United Dominion Reality L.P. | Fair Value | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	8	39
Secured debt instruments - variable rate
Total liabilities	490,581	967,983
United Dominion Reality L.P. | Fair Value | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8	39
Derivatives - Interest rate contracts		918
United Dominion Reality L.P. | Fair Value | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	30,308	391,835
United Dominion Reality L.P. | Fair Value | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	27,000	27,000
United Dominion Reality L.P. | Fair Value | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	263,070	355,470
Secured debt instruments - variable rate
Secured debt instruments - variable rate	170,203	192,760
United Dominion Reality L.P. | Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	0	0
Secured debt instruments - variable rate
Total liabilities	0	0
United Dominion Reality L.P. | Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivatives - Interest rate contracts		0
United Dominion Reality L.P. | Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
United Dominion Reality L.P. | Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
United Dominion Reality L.P. | Fair Value | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
United Dominion Reality L.P. | Fair Value | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	8	39
Secured debt instruments - variable rate
Total liabilities	0	918
United Dominion Reality L.P. | Fair Value | Significant Other Observable Inputs (Level 2) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8	39
Derivatives - Interest rate contracts		918
United Dominion Reality L.P. | Fair Value | Significant Other Observable Inputs (Level 2) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
United Dominion Reality L.P. | Fair Value | Significant Other Observable Inputs (Level 2) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
United Dominion Reality L.P. | Fair Value | Significant Other Observable Inputs (Level 2) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	0	0
Secured debt instruments - variable rate
Secured debt instruments - variable rate	0	0
United Dominion Reality L.P. | Fair Value | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Total assets	0	0
Secured debt instruments - variable rate
Total liabilities	490,581	967,065
United Dominion Reality L.P. | Fair Value | Significant Unobservable Inputs (Level 3) | Interest rate contracts | Fair Value, Measurements, Recurring
Estimated fair values of the financial instruments either recorded or disclosed on a recurring basis
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivatives - Interest rate contracts		0
United Dominion Reality L.P. | Fair Value | Significant Unobservable Inputs (Level 3) | Mortgages [Member] | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	30,308	391,835
United Dominion Reality L.P. | Fair Value | Significant Unobservable Inputs (Level 3) | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring
Secured debt instruments - variable rate
Secured debt instruments - variable rate	27,000	27,000
United Dominion Reality L.P. | Fair Value | Significant Unobservable Inputs (Level 3) | Fannie Mae credit facilities | Fair Value, Measurements, Recurring
Secured debt instruments - fixed rate
Secured debt instruments - fixed rate	263,070	355,470
Secured debt instruments - variable rate
Secured debt instruments - variable rate	$ 170,203	$ 192,760

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

Fair Value Liabilities Measured On Recurring Basis Fixed Rate Secured Debt Instruments.

+ References

No definition available.

+ Details

Name:	udr_FairValueLiabilitiesMeasuredOnRecurringBasisFixedRateSecuredDebtInstrumentsAbstract
Namespace Prefix:	udr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value Liabilities Measured On Recurring Basis Variable Rate Secured Debt Instruments.

+ References

No definition available.

+ Details

Name:	udr_FairValueLiabilitiesMeasuredOnRecurringBasisVariableRateSecuredDebtInstrumentsAbstract
Namespace Prefix:	udr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value of fixed rate secured debt instruments as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	udr_FixedRateSecuredDebtInstrumentsFairValue
Namespace Prefix:	udr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value of variable rate secured debt instruments as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	udr_VariableRateSecuredDebtInstrumentsFairValue
Namespace Prefix:	udr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226006-175313

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41678-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, after offset of derivative asset, of financial liability or 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, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41678-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226006-175313

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&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_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_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
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_FairValueByAssetClassAxis=us-gaap_MortgagesMember
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:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_LineOfCreditMember
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:	dei_LegalEntityAxis=udr_UnitedDominionRealityLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: