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Investments in Real Estate Entities (Details 2) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 community | Dec. 31, 2014 community home property | Dec. 31, 2013 home | Dec. 31, 2012 home | Feb. 29, 2004 home | Dec. 31, 2004 home | Feb. 27, 2013
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of Apartment Homes Sold |  | 1,337 avb_NumberOfApartmentHomesSold | 3,299 avb_NumberOfApartmentHomesSold | 1,578 avb_NumberOfApartmentHomesSold |  |  |
Proceeds from Sale of Real Estate |  | $ 281,125,000 us-gaap_ProceedsFromSaleOfRealEstate | $ 919,442,000 us-gaap_ProceedsFromSaleOfRealEstate | $ 274,018,000 us-gaap_ProceedsFromSaleOfRealEstate |  |  |
Gain on sale of communities |  | 333,221,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal | 96,152,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal | 106,195,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal |  |  |
Repayments of secured mortgages |  | 16,341,000 us-gaap_RepaymentsOfSecuredDebt | 0 us-gaap_RepaymentsOfSecuredDebt | 0 us-gaap_RepaymentsOfSecuredDebt |  |  |
Gains (Losses) on Extinguishment of Debt | (412,000)us-gaap_GainsLossesOnExtinguishmentOfDebt | (412,000)us-gaap_GainsLossesOnExtinguishmentOfDebt | (14,921,000)us-gaap_GainsLossesOnExtinguishmentOfDebt | (1,179,000)us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |
Number of land parcels |  | 1 avb_NumberOfLandParcelsAcquired |  |  |  |  |
Number of apartment communities sold | 8 avb_NumberofApartmentCommunitiesSold | 4 avb_NumberofApartmentCommunitiesSold |  |  |  |  |
Income tax expense |  | 9,368,000 us-gaap_IncomeTaxExpenseBenefit | 0 us-gaap_IncomeTaxExpenseBenefit | 0 us-gaap_IncomeTaxExpenseBenefit |  |  |
CVP I, LLC |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of Apartment Homes Sold |  |  |  |  | 361 avb_NumberOfApartmentHomesSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |
Combined general partner and limited partner equity interest (as a percent) |  | 20.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Distribution percentage after achievement of a threshold return |  | 50.00%avb_PercentageOfRightOfDistribution / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Proceeds from Sale of Real Estate |  | 365,000,000 us-gaap_ProceedsFromSaleOfRealEstate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Gain on sale of communities |  | 50,478,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Income (Loss) from Equity Method Investments Due to Recognition of Promoted Interest from Disposition |  | 58,128,000 avb_IncomeLossfromEquityMethodInvestmentsDuetoRecognitionofPromotedInterestfromDisposition / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Repayments of secured mortgages |  | 117,000,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Gains (Losses) on Extinguishment of Debt |  | 647,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |  |  |
Equity in income of unconsolidated entities relating to the Company's recognition of promoted interest |  | 61,218,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember | 5,527,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember | 5,260,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_CVPILLCMember |  |  |
Residual JV |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Proceeds from Sale of Real Estate |  | 53,052,000 us-gaap_ProceedsFromSaleOfRealEstate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_ResidualJointVentureMember |  |  |  |  |
Gain on sale of communities |  | 8,510,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_ResidualJointVentureMember |  |  |  |  |
MVPI LLC |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Combined general partner and limited partner equity interest (as a percent) |  | 25.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |  |  |  |  |
Distribution percentage after achievement of a threshold return |  | 45.00%avb_PercentageOfRightOfDistribution / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |  |  |  |  |
Number of apartment homes |  |  |  |  |  | 313 avb_NumberOfRealEstateApartmentsHomesAndTownHomesRelatedToJointVenture / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |
Equity in income of unconsolidated entities relating to the Company's recognition of promoted interest |  | 930,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember | 516,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |  |  |  |
SWIB Dispositions |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of Apartment Homes Sold |  | 492 avb_NumberOfApartmentHomesSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_SWIBDispositionsMember |  |  |  |  |
Proceeds from Sale of Real Estate |  | 76,250,000 us-gaap_ProceedsFromSaleOfRealEstate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_SWIBDispositionsMember |  |  |  |  |
US Fund |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of extension options |  | 2 avb_DebtInstrumentNumberOfExtensions / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
Period of extension (in years) |  | 1 year |  |  |  |  |
Number of Institutional Investors |  | 6 avb_NumberOfInstitutionalInvestors / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
Equity investment |  | 88,220,000 us-gaap_EquityMethodInvestments / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
Equity interest held (as a percent) |  | 28.60%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
Number of loans secured by individual assets |  | 9 us-gaap_MortgageLoansOnRealEstateNumberOfLoans / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
Debt outstanding |  | 327,880,000 us-gaap_DebtInstrumentCarryingAmount / dei_LegalEntityAxis = avb_USFundMember |  |  |  |  |
ACJV |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of Institutional Investors |  | 4 avb_NumberOfInstitutionalInvestors / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Equity investment |  | 69,633,000 us-gaap_EquityMethodInvestments / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Equity interest held (as a percent) |  | 20.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Number of loans secured by individual assets |  | 8 us-gaap_MortgageLoansOnRealEstateNumberOfLoans / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Debt outstanding |  | 162,300,000 us-gaap_DebtInstrumentCarryingAmount / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Maximum geographic radius for existing assets within considered for right of first offer |  | 1 avb_MaximumGeographicRadiusForAssetsConsideredForRightOfFirstOffer / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Number of Apartment Homes Sold |  | 103 avb_NumberOfApartmentHomesSold / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Number of Apartment Homes in Communities for Development |  | 301 avb_NumberOfApartmentHomesInCommunitiesForDevelopment / dei_LegalEntityAxis = avb_ACJVMember |  |  |  |  |
Brandywine |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Equity interest held (as a percent) |  | 28.70%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / dei_LegalEntityAxis = avb_BrandywineMember |  |  |  |  | 26.10%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / dei_LegalEntityAxis = avb_BrandywineMember
Debt outstanding |  | 24,346,000 us-gaap_DebtInstrumentCarryingAmount / dei_LegalEntityAxis = avb_BrandywineMember |  |  |  |  |
Number of Apartment Homes in Communities Owned |  | 305 avb_NumberOfApartmentHomesInCommunitiesOwned / dei_LegalEntityAxis = avb_BrandywineMember |  |  |  |  |
Number of members who hold various interests in the joint venture |  | 5 avb_NumberOfMembersWhoHoldVariousInterestsInJointVenture / dei_LegalEntityAxis = avb_BrandywineMember |  |  |  |  |
Additional interest purchased |  | 2.60%avb_BusinessAcquisitionAdditionalInterestAcquiredPercentage / dei_LegalEntityAxis = avb_BrandywineMember |  |  |  |  |
SWIB |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Equity interest held (as a percent) |  | 20.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Debt outstanding |  | 148,866,000 us-gaap_DebtInstrumentCarryingAmount / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Gain on sale of communities |  | 779,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Repayments of secured mortgages |  | 38,155,000 us-gaap_RepaymentsOfSecuredDebt / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Number of Communities Owned |  | 4 avb_NumberOfCommunitiesOwned / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Number of Apartment Homes in Communities Owned |  | 1,410 avb_NumberOfApartmentHomesInCommunitiesOwned / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Number of land parcels |  | 2 avb_NumberOfLandParcelsAcquired / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Ownership interest held by subsidiaries of the entity (as a percent) |  | 40.00%avb_OwnershipInterestHeldBySubsidiaries / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Number of apartment communities sold |  | 2 avb_NumberofApartmentCommunitiesSold / dei_LegalEntityAxis = avb_SWIBMember |  |  |  |  |
Arna Valley View LP |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Number of Apartment Homes Sold |  | 101 avb_NumberOfApartmentHomesSold / us-gaap_BusinessAcquisitionAxis = avb_ArnaValleyViewLPMember |  |  |  |  |
Repayments of secured mortgages |  | 8,934,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_BusinessAcquisitionAxis = avb_ArnaValleyViewLPMember |  |  |  |  |
Equity in income of unconsolidated entities relating to the Company's recognition of promoted interest |  | 2,406,000 avb_IncomeLossFromEquityMethodInvestmentsDueToRecognitionOfPromotedInterest / us-gaap_BusinessAcquisitionAxis = avb_ArnaValleyViewLPMember |  |  |  |  |
Secured notes |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Repayments of secured mortgages | 5,914,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |  |  |
Variable rate notes |  | 1,047,461,000 us-gaap_LongtermDebtPercentageBearingVariableInterestAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember | 1,011,609,000 us-gaap_LongtermDebtPercentageBearingVariableInterestAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |
Secured notes | MVPI LLC |  |  |  |  |  |  |
Investment in Real Estate Entities |  |  |  |  |  |  |
Variable rate notes |  | $ 105,000,000 us-gaap_LongtermDebtPercentageBearingVariableInterestAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  | 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = avb_MVPILLCMember |  |  |  |  |
Debt instrument variable rate (as a percent) |  | LIBOR |  |  |  |  |

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