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Segment Reporting Segment Reporting (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting [Abstract] |  |  |
Rental income from real estate assets sold or held for sale, not classified as discontinued operations | $ 24,389 avb_RevenueFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | $ 30,867 avb_RevenueFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | $ 21,463 avb_RevenueFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations
Operating expenses real estate assets sold or held for sale, not classified as discontinued operations | (9,190)avb_OperatingExpensesFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | (11,419)avb_OperatingExpensesFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | (7,687)avb_OperatingExpensesFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations
Net operating income from real estate assets sold or held for sale, not classified as discontinued operations | $ 15,199 avb_DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | $ 19,448 avb_DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations | $ 13,776 avb_DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations

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- Definition Disposal Group, Not Discontinued Operation, Net Operating Income From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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Namespace Prefix: | avb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Operating Expenses From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
Name: | avb_OperatingExpensesFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations
Namespace Prefix: | avb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Revenue From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
Name: | avb_RevenueFromAssetsHeldforSaleNotClassifiedasDiscontinuedOperations
Namespace Prefix: | avb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration