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Organization and Basis of Presentation (Details 3) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 home | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 home | Dec. 31, 2013 | Dec. 31, 2012
Basic and diluted shares outstanding |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares—basic |  |  |  |  |  |  |  |  | 130,586,718 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 126,855,754 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 97,416,401 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average DownREIT units outstanding (in shares) |  |  |  |  |  |  |  |  | 7,500 us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted | 7,500 us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted | 7,500 us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted
Effect of dilutive securities (in shares) |  |  |  |  |  |  |  |  | 643,284 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 402,649 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 601,251 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Weighted average common shares - diluted (in shares) |  |  |  |  |  |  |  |  | 131,237,502 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 127,265,903 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 98,025,152 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Calculation of Earnings per Share—basic |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ 142,642,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 241,100,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 158,086,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 141,739,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 252,212,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (10,715,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 36,218,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 75,427,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 683,567,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 353,141,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 423,869,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income allocated to unvested restricted shares |  |  |  |  |  |  |  |  | (1,523,000)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (563,000)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (1,264,000)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic
Net income attributable to common stockholders, adjusted |  |  |  |  |  |  |  |  | 682,044,000 us-gaap_UndistributedEarnings | 352,578,000 us-gaap_UndistributedEarnings | 422,605,000 us-gaap_UndistributedEarnings
Weighted average common shares—basic |  |  |  |  |  |  |  |  | 130,586,718 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 126,855,754 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 97,416,401 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Earnings per common share - basic (in dollars per share) | $ 1.08 us-gaap_EarningsPerShareBasic | $ 1.83 us-gaap_EarningsPerShareBasic | $ 1.22 us-gaap_EarningsPerShareBasic | $ 1.09 us-gaap_EarningsPerShareBasic | $ 1.95 us-gaap_EarningsPerShareBasic | $ (0.08)us-gaap_EarningsPerShareBasic | $ 0.28 us-gaap_EarningsPerShareBasic | $ 0.63 us-gaap_EarningsPerShareBasic | $ 5.22 us-gaap_EarningsPerShareBasic | $ 2.78 us-gaap_EarningsPerShareBasic | $ 4.34 us-gaap_EarningsPerShareBasic
Calculation of Earnings per Share—diluted |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | 142,642,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 241,100,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 158,086,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 141,739,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 252,212,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (10,715,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 36,218,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 75,427,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 683,567,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 353,141,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 423,869,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations |  |  |  |  |  |  |  |  | 35,000 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest | 32,000 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest | 28,000 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest
Adjusted net income attributable to common stockholders |  |  |  |  |  |  |  |  | 683,602,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | 353,173,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | 423,897,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Weighted average common shares—diluted |  |  |  |  |  |  |  |  | 131,237,502 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 127,265,903 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 98,025,152 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings per common share - diluted (in dollars per share) | $ 1.08 us-gaap_EarningsPerShareDiluted | $ 1.83 us-gaap_EarningsPerShareDiluted | $ 1.21 us-gaap_EarningsPerShareDiluted | $ 1.09 us-gaap_EarningsPerShareDiluted | $ 1.95 us-gaap_EarningsPerShareDiluted | $ (0.08)us-gaap_EarningsPerShareDiluted | $ 0.28 us-gaap_EarningsPerShareDiluted | $ 0.63 us-gaap_EarningsPerShareDiluted | $ 5.21 us-gaap_EarningsPerShareDiluted | $ 2.78 us-gaap_EarningsPerShareDiluted | $ 4.32 us-gaap_EarningsPerShareDiluted
Dividends per common share: (in dollars per share) |  |  |  |  |  |  |  |  | $ 4.64 us-gaap_CommonStockDividendsPerShareDeclared | $ 4.28 us-gaap_CommonStockDividendsPerShareDeclared | $ 3.88 us-gaap_CommonStockDividendsPerShareDeclared
Options to purchase shares of common stock excluded from computation of earnings per share amount (in shares) |  |  |  |  |  |  |  |  |  | 605,899 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 396,346 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Estimated forfeiture rate of stock options (as a percent) |  |  |  |  |  |  |  |  | 1.40%avb_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAnnualForfeitureRate |  |
Casualty Loss, Abandoned Pursuit Costs and Impairment of Long-Lived Assets |  |  |  |  |  |  |  |  |  |  |
Impairment of wholly-owned operating real estate assets |  |  |  |  |  |  |  |  | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Abandoned pursuits costs |  |  |  |  |  |  |  |  | 3,964,000 avb_AbandonedPursuitCosts | 998,000 avb_AbandonedPursuitCosts | 1,757,000 avb_AbandonedPursuitCosts
Impairment of Real Estate |  |  |  |  |  |  |  |  | 0 us-gaap_ImpairmentOfRealEstate | 0 us-gaap_ImpairmentOfRealEstate | 0 us-gaap_ImpairmentOfRealEstate
Impairment of investment in unconsolidated entities |  |  |  |  |  |  |  |  | 0 us-gaap_ImpairmentOfInvestments | 0 us-gaap_ImpairmentOfInvestments | 0 us-gaap_ImpairmentOfInvestments
Casualty and impairment loss |  |  |  |  |  |  |  |  | 0 avb_CasualtyAndImpairmentLoss | 0 avb_CasualtyAndImpairmentLoss | 1,449,000 avb_CasualtyAndImpairmentLoss
Gain on business interruption insurance recovery |  |  |  |  |  |  |  |  | 2,494,000 us-gaap_GainOnBusinessInterruptionInsuranceRecovery | 299,000 us-gaap_GainOnBusinessInterruptionInsuranceRecovery | 0 us-gaap_GainOnBusinessInterruptionInsuranceRecovery
Number of communities held for sale | 1 avb_NumberOfCommunitiesHeldForSale |  |  |  |  |  |  |  | 1 avb_NumberOfCommunitiesHeldForSale |  |
Derivative Instruments and Hedging Activities |  |  |  |  |  |  |  |  |  |  |
Loss on interest rate contract |  |  |  |  |  |  |  |  | $ 0 us-gaap_GainLossOnInterestRateFairValueHedgeIneffectiveness | $ 51,000,000 us-gaap_GainLossOnInterestRateFairValueHedgeIneffectiveness | $ 0 us-gaap_GainLossOnInterestRateFairValueHedgeIneffectiveness
Noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Maximum Ownership Interest Percentage in Joint Venture | 100.00%avb_MaximumOwnershipInterestPercentageInJointVenture |  |  |  |  |  |  |  | 100.00%avb_MaximumOwnershipInterestPercentageInJointVenture |  |

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- Definition The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780133-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780132-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2740-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2814-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 65 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2793-109256 + Details
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