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REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jan. 31, 2015 home
--- | --- | --- | --- | --- | ---
Initial Cost |  |  |  |  |
Land and improvements | $ 3,657,002 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand |  |  |  |
Building / Construction in Progress & Improvements | 11,700,112 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,492,202 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts |  |  |  |
Total Cost |  |  |  |  |
Land | 3,657,002 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand |  |  |  |
Building / Construction in Progress & Improvements | 14,192,314 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements |  |  |  |
Total | 17,849,316 us-gaap_RealEstateGrossAtCarryingValue | 16,800,321 us-gaap_RealEstateGrossAtCarryingValue | 10,071,342 us-gaap_RealEstateGrossAtCarryingValue | 9,288,496 us-gaap_RealEstateGrossAtCarryingValue |
Accumulated Depreciation | 2,913,576 us-gaap_RealEstateAccumulatedDepreciation | 2,516,112 us-gaap_RealEstateAccumulatedDepreciation | 2,056,222 us-gaap_RealEstateAccumulatedDepreciation | 1,863,466 us-gaap_RealEstateAccumulatedDepreciation |
Total Cost, Net of Accumulated Depreciation | 14,935,740 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet |  |  |  |
Encumbrances | 6,448,138 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances |  |  |  |
New England |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 368,626 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Building / Construction in Progress & Improvements | 1,699,098 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 196,781 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Total Cost |  |  |  |  |
Land | 368,626 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Building / Construction in Progress & Improvements | 1,895,879 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Total | 2,264,505 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Accumulated Depreciation | 479,122 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 1,785,383 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Encumbrances | 464,466 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_NewEnglandMember |  |  |  |
Metro NY/NJ |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 824,368 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Building / Construction in Progress & Improvements | 2,646,185 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 136,991 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Total Cost |  |  |  |  |
Land | 824,368 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Building / Construction in Progress & Improvements | 2,783,176 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Total | 3,607,544 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Accumulated Depreciation | 692,549 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 2,914,995 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Encumbrances | 855,847 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_MetroNYNJMember |  |  |  |
Mid-Atlantic |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 620,356 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Building / Construction in Progress & Improvements | 1,839,822 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 141,299 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Total Cost |  |  |  |  |
Land | 620,356 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Building / Construction in Progress & Improvements | 1,981,121 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Total | 2,601,477 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Accumulated Depreciation | 396,214 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 2,205,263 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Encumbrances | 597,830 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_MidAtlanticMember |  |  |  |
Pacific Northwest |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 130,143 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Building / Construction in Progress & Improvements | 630,180 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 31,481 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Total Cost |  |  |  |  |
Land | 130,143 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Building / Construction in Progress & Improvements | 661,661 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Total | 791,804 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Accumulated Depreciation | 149,204 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 642,600 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Encumbrances | 25,491 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_PacificNorthwestMember |  |  |  |
Northern California |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 634,176 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Building / Construction in Progress & Improvements | 2,095,394 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 242,939 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Total Cost |  |  |  |  |
Land | 634,176 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Building / Construction in Progress & Improvements | 2,338,333 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Total | 2,972,509 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Accumulated Depreciation | 636,163 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 2,336,346 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Encumbrances | 681,301 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_NorthernCaliforniaMember |  |  |  |
Southern California |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 805,410 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Building / Construction in Progress & Improvements | 2,171,128 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 326,665 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Total Cost |  |  |  |  |
Land | 805,410 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Building / Construction in Progress & Improvements | 2,497,793 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Total | 3,303,203 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Accumulated Depreciation | 497,409 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 2,805,794 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Encumbrances | 806,678 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_SouthernCaliforniaMember |  |  |  |
Non-core |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 29,754 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Building / Construction in Progress & Improvements | 140,264 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,828 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Total Cost |  |  |  |  |
Land | 29,754 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Building / Construction in Progress & Improvements | 142,092 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Total | 171,846 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Accumulated Depreciation | 7,599 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 164,247 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Encumbrances | 16,525 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_NoncoreMember |  |  |  |
Current Communities |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,412,833 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,222,071 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,077,984 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,412,833 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,300,055 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 15,712,888 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,858,260 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,854,628 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 3,448,138 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Lexington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,124 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,599 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,199 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,124 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,798 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 23,922 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,484 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,438 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Oaks |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,129 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 18,676 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,038 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,129 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,714 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 22,843 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,094 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 11,749 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 15,887 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Quincy |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 1,743 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 14,662 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,283 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 1,743 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,945 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,688 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,805 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 13,883 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Essex |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,184 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,320 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,821 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,184 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 18,141 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 23,325 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,289 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 14,036 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEssexMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Oaks West |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,318 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 13,467 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 746 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,318 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 14,213 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 17,531 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,376 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 11,155 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 15,847 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOaksWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Orchards |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,983 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 18,037 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,943 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,983 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,980 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 22,963 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,902 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 14,061 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 17,091 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOrchardsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Newton Highlands |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,039 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,590 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,423 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,039 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,013 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 60,052 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,353 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 40,699 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtNewtonHighlandsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at the Pinehills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,876 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,401 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 183 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,876 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,584 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 37,460 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,836 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,624 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtThePinehillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Peabody |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,645 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,007 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,019 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,645 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,026 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 35,671 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,746 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 25,925 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPeabodyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Bedford Center |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,258 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,569 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 316 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,258 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,885 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,143 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,630 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 18,513 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBedfordCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Chestnut Hill |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,572 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,911 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,899 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,572 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,810 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 62,382 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,588 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 48,794 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 39,545 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonChestnutHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Shrewsbury |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,152 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,608 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 757 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,152 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,365 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 36,517 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,062 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 27,455 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 20,174 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonShrewsburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Lexington Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,691 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 79,153 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,112 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,691 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 80,265 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 88,956 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,446 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 69,510 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtLexingtonHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Acton |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,124 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,905 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 276 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,124 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,181 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 63,305 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,089 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 51,216 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 45,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonActonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Sharon |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,719 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,522 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 269 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,719 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,791 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 30,510 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,030 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 24,480 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSharonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Center Place |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 26,816 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 10,230 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 37,046 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 37,046 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,919 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,127 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCenterPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Hingham Shipyard |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,218 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,725 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 339 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,218 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,064 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 54,282 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,089 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 45,193 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtHinghamShipyardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Northborough |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,144 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,454 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 16 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,144 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,470 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 60,614 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,170 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 51,444 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthboroughMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Blue Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,110 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,736 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 80 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,110 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,816 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 45,926 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,856 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 39,070 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Cohasset |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,802 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,233 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 16 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,802 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,249 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 55,051 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,910 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 50,141 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCohassetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Andover |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,276 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,903 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,276 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,903 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 26,179 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,114 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 24,065 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 14,505 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAndoverMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Burlington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,714 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 32,536 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,080 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,714 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 37,616 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 45,330 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,383 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,947 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Back Bay |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,034 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,540 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 36,364 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,034 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 72,904 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 81,938 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 26,205 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 55,733 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABackBayMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Prudential Center II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,776 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 35,496 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 31,783 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,776 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 67,279 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 76,055 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 25,100 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 50,955 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Prudential Center I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,002 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 32,370 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 19,773 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,002 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,143 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 60,145 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 22,772 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 37,373 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtPrudentialCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Burlington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,600 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 59,200 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6,943 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,600 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 66,143 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 81,743 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,334 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 76,409 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Bear Hill |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 27,350 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 96,999 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,110 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 27,350 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 102,109 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 129,459 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,304 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 118,155 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBearHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves North Quincy |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,940 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 39,400 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,491 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,940 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,891 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 53,831 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,784 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 49,047 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 36,761 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNorthQuincyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Natick |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,645 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,585 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,645 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,585 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 80,230 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,476 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 76,754 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 52,357 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNatickMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Canton at Blue Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,562 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,191 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,562 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,191 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,753 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 769 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 38,984 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCantonatBlueHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Exeter |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 16,304 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 108,126 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 16,304 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 108,126 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 124,430 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,842 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 122,588 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonExeterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Trumbull |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,414 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,268 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,529 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,414 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,797 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,211 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,696 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 18,515 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 39,452 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTrumbullMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Stamford |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,956 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,993 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,748 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,956 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,741 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 42,697 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,049 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 22,648 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Wilton I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,116 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 14,664 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,841 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,116 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,505 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 22,621 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,855 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,766 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon on Stamford Harbor |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,836 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 51,883 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,778 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,836 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 53,661 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 64,497 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 22,322 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,175 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 62,724 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnStamfordHarborMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon New Canaan |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,834 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,485 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,559 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,834 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,044 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,878 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,672 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,206 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNewCanaanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Stamford |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,819 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 56,499 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,602 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,819 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 61,101 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 74,920 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 25,069 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 49,851 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 57,423 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAStamfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Danbury |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,933 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,638 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 670 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,933 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,308 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 36,241 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,352 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 25,889 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDanburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Darien |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,926 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,659 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,689 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,926 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,348 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 43,274 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,817 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,457 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 47,700 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDarienMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Milford I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,746 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,699 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 725 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,746 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,424 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,170 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,493 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 23,677 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMilfordIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Huntington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,277 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,029 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 100 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,277 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,129 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,406 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,406 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 21,000 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Norwalk |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,320 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 62,910 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 25 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,320 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 62,935 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 74,255 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,372 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 64,883 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Wilton II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,604 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,758 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,604 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,764 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 30,368 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,997 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 27,371 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWiltonIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Shelton III |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,853 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,866 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,853 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,866 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 48,719 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,279 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,440 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSheltonIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon East Norwalk |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,394 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,126 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,394 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,126 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 46,520 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,645 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 44,875 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEastNorwalkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Stratford |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,564 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,884 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,564 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,884 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 29,448 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 341 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,107 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtStratfordMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Commons |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,679 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,286 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,660 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,679 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,946 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 38,625 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,664 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 19,961 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCommonsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Nanuet |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,428 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,660 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,903 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,428 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,563 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 57,991 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,325 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,666 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 63,242 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesNanuetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Green |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 1,820 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 10,525 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,675 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 1,820 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,200 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 14,020 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,031 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 5,989 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Towers |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,118 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,973 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 10,260 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,118 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,233 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,351 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,437 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 13,914 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Willow |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,207 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,791 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,423 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,207 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,214 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 48,421 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,846 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 26,575 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Court |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,228 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,063 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,908 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,228 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,971 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 62,199 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,734 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,465 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourtMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | The Avalon |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,889 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,324 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 7,993 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,889 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,317 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,206 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 15,882 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 23,324 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheAvalonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Glen Cove |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,871 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 59,969 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,097 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,871 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 61,066 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 68,937 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,970 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,967 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlenCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Pines |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,700 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 62,931 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 621 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,700 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 63,552 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 72,252 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,828 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 51,424 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPinesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Glen Cove North |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,577 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 37,336 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 232 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,577 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 37,568 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 40,145 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,016 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 30,129 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlenCoveNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon White Plains |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,391 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 137,353 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 46 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,391 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 137,399 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 152,790 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 27,434 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 125,356 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhitePlainsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Charles Pond |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,715 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,640 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 48 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,715 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,688 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 48,403 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,824 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 41,579 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCharlesPondMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Rockville Centre |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 32,212 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 78,807 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 32,212 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 78,807 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 111,019 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,480 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 102,539 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockvilleCentreMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Green II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 27,765 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 77,560 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 27,765 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 77,560 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 105,325 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,330 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 97,995 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Garden City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,205 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,372 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,205 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,372 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 67,577 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,999 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 63,578 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGardenCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Westbury |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 69,620 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,781 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 7,410 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 69,620 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 51,191 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 120,811 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,720 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 112,091 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 82,345 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestburyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Ossining |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,385 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,099 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,385 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,099 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 36,484 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 762 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 35,722 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOssiningMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Huntington Station |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 21,870 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 57,545 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 21,870 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 57,545 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 79,415 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 844 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 78,571 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Cove |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,760 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 82,422 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 21,060 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,760 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 103,482 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 112,242 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 54,057 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 58,185 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCoveMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Run |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,650 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,486 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,526 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,650 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 66,012 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 80,662 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 23,905 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 56,757 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Princeton Junction |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,585 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,382 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 20,791 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,585 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,173 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 48,758 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,392 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 27,366 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonJunctionMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Edgewater |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,528 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,240 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,302 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,528 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,542 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 79,070 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,885 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 50,185 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 75,012 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Florham Park |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,647 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,906 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,179 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,647 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 37,085 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 43,732 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,009 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 25,723 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFlorhamParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Freehold |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,119 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,514 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 900 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,119 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,414 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 35,533 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,959 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 21,574 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 34,973 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFreeholdMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Run East |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,766 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,366 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 919 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,766 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,285 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 53,051 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,286 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 36,765 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 37,475 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRunEastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Lyndhurst |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,620 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 59,879 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 579 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,620 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,458 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 79,078 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,676 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 62,402 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLyndhurstMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Tinton Falls |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,939 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,173 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 96 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,939 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,269 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 41,208 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,755 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,453 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTintonFallsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at West Long Branch |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,721 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,940 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,721 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,940 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,661 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,479 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 22,182 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestLongBranchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon North Bergen |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,984 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,015 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 514 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,984 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,529 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 40,513 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,819 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 37,694 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthBergenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Wesmont Station |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,682 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,635 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 875 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,682 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,510 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 57,192 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,860 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 53,332 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtWesmontStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Hackensack at Riverside |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 44,530 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHackensackAtRiversideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 44,530 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHackensackAtRiversideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 44,530 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHackensackAtRiversideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,312 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHackensackAtRiversideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,218 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHackensackAtRiversideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Somerset |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,241 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 58,326 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,241 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 58,326 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 76,567 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,366 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 73,201 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSomersetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Wesmont Station II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,502 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,862 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,502 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,862 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 23,364 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 992 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 22,372 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatWesmontStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Bloomingdale |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,005 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,721 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,005 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,721 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 30,726 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,098 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,628 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomingdaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Riverview I |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 94,061 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,894 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 98,955 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 98,955 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 41,548 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 57,407 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Bowery Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,575 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 75,009 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,992 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,575 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 77,001 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 95,576 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 22,047 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 73,529 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 93,800 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Riverview North |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 164,808 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,404 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 167,212 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 167,212 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 41,970 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 125,242 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRiverviewNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Bowery Place II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,106 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,199 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,633 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,106 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 48,832 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 57,938 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,904 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,034 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBoweryPlaceIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Morningside Park |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 114,327 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 870 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 115,197 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 115,197 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 24,642 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 90,555 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 100,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorningsideParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Fort Greene |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 83,038 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 218,444 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 642 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 83,038 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 219,086 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 302,124 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 35,170 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 266,954 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFortGreeneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Midtown West |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 154,730 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 180,253 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,012 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 154,730 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 192,265 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 346,995 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 23,002 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 323,993 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 100,500 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMidtownWestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Clinton North |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 84,069 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 105,821 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6,352 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 84,069 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 112,173 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 196,242 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,558 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 183,684 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 147,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Clinton South |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 71,421 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 89,851 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,175 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 71,421 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 95,026 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 166,447 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,732 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 155,715 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 121,500 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonClintonSouthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Foxhall |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,848 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,614 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 11,671 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,848 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 39,285 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 46,133 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 24,950 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 21,183 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 56,341 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFoxhallMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Gallery Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,800 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 39,658 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,557 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,800 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,215 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 50,015 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,412 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,603 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 43,776 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGalleryPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Fairway Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,603 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,432 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 16,036 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,603 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,468 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 59,071 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,397 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 30,674 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtFairwayHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Washingtonian Center I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,608 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,707 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 629 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,608 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,336 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 14,944 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,913 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 7,031 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 8,011 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Washingtonian Center II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 1,439 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 6,846 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 180 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 1,439 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 7,026 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 8,465 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,970 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 4,495 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWashingtonianCenterIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Columbia Town Center |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,802 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 35,536 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 11,429 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,802 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,965 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 55,767 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,273 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 39,494 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesColumbiaTownCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Grosvenor Station |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 29,159 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 53,001 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,002 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 29,159 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 55,003 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 84,162 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,020 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 63,142 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGrosvenorStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Traville |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,365 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 55,398 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 863 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,365 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 56,261 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 70,626 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,385 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 49,241 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 74,186 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtTravilleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Russett |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,200 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,524 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,659 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,200 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,183 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 60,383 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,547 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 54,836 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 39,972 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRussettMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Fair Lakes |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,096 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,400 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 8,246 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,096 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 32,646 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 38,742 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 17,777 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 20,965 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairLakesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Ballston |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,291 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 29,177 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 16,117 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,291 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,294 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 52,585 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 24,294 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 28,291 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallstonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Fairfax City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,152 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 8,907 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,390 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,152 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 14,297 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 16,449 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,624 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 9,825 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Tysons Corner |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,851 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,397 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,106 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,851 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 55,503 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 69,354 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 26,784 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,570 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Arlington Square |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 22,041 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 90,296 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,818 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 22,041 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 93,114 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 115,155 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 42,880 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 72,275 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtArlingtonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Park Crest |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,554 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 63,527 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,554 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 63,527 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 77,081 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,886 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 72,195 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParkCrestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Fairfax Towers |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 17,889 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 74,727 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,718 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 17,889 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 76,445 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 94,334 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,782 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 84,552 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFairfaxTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA H Street |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,425 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,282 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,425 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,282 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,707 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,782 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 30,925 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAHStreetMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon First & M |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 43,700 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 153,950 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,411 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 43,700 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 156,361 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 200,061 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,255 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 187,806 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 140,964 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFirstandMMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | The Albemarle |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 25,140 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,459 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,717 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 25,140 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 56,176 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 81,316 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,980 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 74,336 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTheAlbemarleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Tunlaw Gardens |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 16,430 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,902 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,025 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 16,430 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,927 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 41,357 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,162 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 38,195 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 28,494 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTunlawGardensMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | The Statesman |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 38,140 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 35,352 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,453 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 38,140 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 38,805 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 76,945 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,815 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 71,130 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_TheStatesmanMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Glover Park |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,580 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,532 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,954 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,580 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,486 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 38,066 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,385 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 34,681 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 23,569 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesGloverParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Van Ness |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 22,890 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 58,691 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,455 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 22,890 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 62,146 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 85,036 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,844 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 78,192 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAVanNessMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Ballston Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 38,490 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 123,645 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,768 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 38,490 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 127,413 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 165,903 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,532 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 154,371 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Tysons Corner |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 16,030 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,420 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,554 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 16,030 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,974 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 64,004 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,509 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 58,495 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesTysonsCornerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Ballston Square |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 71,640 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 215,937 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 10,200 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 71,640 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 226,137 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 297,777 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 23,372 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 274,405 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBallstonSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone Courthouse Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 56,550 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 178,032 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 8,131 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 56,550 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 186,163 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 242,713 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,921 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 223,792 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 140,332 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCourthousePlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Reston Landing |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 26,710 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 83,084 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,354 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 26,710 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 87,438 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 114,148 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,863 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 104,285 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRestonLandingMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Oakwood Arlington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,850 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 38,545 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,856 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,850 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,401 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 59,251 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,324 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 54,927 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 42,185 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodArlingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Mosaic |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 33,483 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 75,081 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 33,483 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 75,081 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 108,564 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,108 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 106,456 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMosaicMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Arlington North |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 21,600 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 58,763 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 21,600 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 58,763 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 80,363 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,468 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 78,895 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonArlingtonNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Redmond Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,558 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 18,368 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,879 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,558 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,247 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,805 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,541 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 18,264 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRedmondPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Bear Creek |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,786 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,641 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,427 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,786 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,068 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 37,854 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 17,457 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 20,397 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtBearCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Bellevue |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,664 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,119 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,685 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,664 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,804 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,468 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,245 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 20,223 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 25,491 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon RockMeadow |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,777 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,765 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,901 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,777 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,666 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 26,443 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,695 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 15,748 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRockMeadowMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon ParcSquare |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,789 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 15,139 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,630 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,789 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 17,769 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 21,558 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,587 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,971 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonParcSquareMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Brandemoor |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,608 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,679 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,656 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,608 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 38,335 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 46,943 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,143 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 28,800 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Belltown |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,644 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,733 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 830 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,644 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 13,563 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 19,207 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,330 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,877 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABelltownMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Meydenbauer |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,697 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 77,451 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 936 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,697 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 78,387 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 91,084 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,053 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 73,031 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMeydenbauerMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Towers Bellevue |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 123,030 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 811 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 123,841 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 123,841 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,003 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 104,838 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersBellevueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Queen Anne |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,081 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,618 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 347 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,081 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,965 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 54,046 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,357 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 49,689 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAQueenAnneMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Brandemoor II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,655 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,343 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,655 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,343 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 13,998 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,435 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,563 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBrandemoorIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Ballard |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 16,460 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,885 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 16,460 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,891 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 63,351 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,811 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 60,540 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABallardMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Redmond Campus |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 22,580 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 88,001 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,248 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 22,580 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 93,249 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 115,829 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,158 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 105,671 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRedmondCampusMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone Redmond Lakeview |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,250 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,842 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,831 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,250 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,673 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 38,923 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,302 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 35,621 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneRedmondLakeviewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA University District |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,594 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,566 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 294 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,594 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,860 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 73,454 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,087 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 71,367 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAUniversityDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Fremont |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,746 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,399 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,059 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,746 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 48,458 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 59,204 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,083 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 31,121 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Dublin |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,276 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,642 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,167 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,276 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,809 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 34,085 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,183 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 19,902 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDublinMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Pleasanton |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,610 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,552 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 21,254 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,610 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 67,806 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 79,416 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 33,374 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,042 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPleasantonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Union City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,249 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,820 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,832 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,249 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,652 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 23,901 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,402 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,499 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Fremont |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,581 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,583 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,730 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,581 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,313 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 42,894 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,198 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 23,696 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFremontMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Union City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,732 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 104,025 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 294 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,732 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 104,319 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 119,051 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 19,722 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 99,329 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Walnut Creek |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 145,906 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,643 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 147,549 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 147,549 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 22,354 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 125,195 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 137,542 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Walnut Creek |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 30,320 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 82,375 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,597 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 30,320 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 87,972 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 118,292 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,646 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 108,646 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWalnutCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Walnut Ridge I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,860 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,850 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 878 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,860 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,728 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 30,588 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,159 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 28,429 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 20,754 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Walnut Ridge II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 27,190 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 57,041 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,299 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 27,190 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,340 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 87,530 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,990 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 80,540 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWalnutRidgeIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Berkeley |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,500 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,646 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,500 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,646 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 33,146 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 467 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 32,679 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBerkeleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Dublin Station |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,771 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 71,026 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,771 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 71,026 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 78,797 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,782 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 77,015 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Daly City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,230 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 9,659 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 18,662 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,230 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,321 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,551 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,804 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,747 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDalyCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Nob Hill |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,403 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,567 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6,888 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,403 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,455 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 33,858 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,033 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 19,825 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 20,800 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANobHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves San Rafael |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,982 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,885 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 24,197 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,982 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,082 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 47,064 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 17,997 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,067 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanRafaelMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Foster City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,852 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,445 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 11,207 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,852 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,652 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 50,504 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 21,206 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,298 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesFosterCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Pacifica |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,125 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,796 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,541 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,125 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,337 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 33,462 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 15,595 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,867 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 17,600 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPacificaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Sunset Towers |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,561 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,321 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 14,894 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,561 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 36,215 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,776 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,136 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 23,640 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSunsetTowersMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Diamond Heights |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,726 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,130 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,790 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,726 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,920 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 29,646 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,976 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 16,670 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesDiamondHeightsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Mission Bay North |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,029 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 78,452 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,482 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,029 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 80,934 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 94,963 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 33,067 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 61,896 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 69,955 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtMissionBayNorthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Mission Bay III |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 28,687 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 119,156 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 74 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 28,687 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 119,230 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 147,917 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 22,702 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 125,215 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatMissionBayIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Ocean Avenue |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,544 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,883 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,740 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,544 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 52,623 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 58,167 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,827 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 53,340 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOceanAvenueMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone San Bruno |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 40,780 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 68,684 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,891 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 40,780 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 71,575 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 112,355 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,423 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 104,932 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 64,450 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone San Bruno II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 23,787 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 44,934 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,668 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 23,787 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,602 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 70,389 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,527 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 65,862 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 30,968 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone San Bruno III |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 33,303 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 62,910 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,349 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 33,303 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 65,259 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 98,562 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,340 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 92,222 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 56,210 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanBrunoIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA 55 Ninth |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 20,267 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 96,291 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 20,267 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 96,291 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 116,558 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,022 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 114,536 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVA55NinthMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Campbell |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 11,830 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,828 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 13,431 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 11,830 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 61,259 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 73,089 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,671 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 44,418 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 38,800 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCampbellMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves San Jose |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,920 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 53,047 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 18,810 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,920 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 71,857 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 84,777 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,688 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 56,089 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanJoseMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon on the Alameda |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,119 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 50,225 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,644 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,119 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 51,869 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 57,988 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 28,035 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,953 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 51,539 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOnTheAlamedaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Silicon Valley |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 20,713 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 99,573 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,987 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 20,713 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 104,560 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 125,273 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 59,276 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 65,997 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSiliconValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Mountain View |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,755 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 39,393 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,511 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,755 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 48,904 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 58,659 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 25,542 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,117 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 18,100 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMountainViewMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Creekside |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,546 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 26,263 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 20,984 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,546 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,247 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 53,793 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,739 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,054 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCreeksideMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Cahill Park |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,765 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,600 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,433 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,765 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,033 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 53,798 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,749 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,049 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtCahillParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Towers on the Peninsula |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,560 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 56,136 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,103 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,560 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 57,239 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 66,799 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 25,115 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 41,684 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonTowersOnThePeninsulaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Willow Glen |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 46,060 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 81,957 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,034 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 46,060 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 85,991 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 132,051 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,780 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 122,271 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWillowGlenMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves West Valley |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 90,890 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 113,628 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 7,019 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 90,890 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 120,647 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 211,537 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,646 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 196,891 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 83,087 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Mountain View at Middlefield |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 64,070 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 69,018 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,847 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 64,070 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 73,865 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 137,935 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,416 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 128,519 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 71,496 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMountainViewAtMiddlefieldMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves West Valley II |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 18,411 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 18,411 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 18,411 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 735 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,676 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWestValleyIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Morrison Park |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,837 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,337 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,837 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,337 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 78,174 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,756 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 76,418 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMorrisonParkMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Newport |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 1,975 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 3,814 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,802 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 1,975 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 13,616 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 15,591 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,491 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 10,100 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVANewportMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Mission Viejo |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,517 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 9,257 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,783 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,517 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,040 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 14,557 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 7,157 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 7,400 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 7,635 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionViejoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves South Coast |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,709 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,063 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,772 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,709 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,835 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 33,544 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,887 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 19,657 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSouthCoastMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Santa Margarita |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,607 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,911 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 10,247 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,607 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,158 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 31,765 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,753 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 19,012 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSantaMargaritaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Huntington Beach |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,871 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 19,745 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,530 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,871 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 29,275 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 34,146 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,657 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 17,489 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Anaheim Stadium |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 27,874 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 69,156 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 645 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 27,874 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 69,801 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 97,675 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 14,359 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 83,316 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAnaheimStadiumMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Irvine |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,911 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 67,524 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 69 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,911 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 67,593 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 77,504 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,521 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 64,983 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Lake Forest |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,199 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,134 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,114 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,199 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 23,248 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 28,447 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,006 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 25,441 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLakeForestMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Irvine II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,358 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,906 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,358 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,906 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 45,264 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,753 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,511 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Seal Beach |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 46,790 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 99,999 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,635 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 46,790 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 104,634 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 151,424 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,178 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 140,246 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 85,122 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSealBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Pacific Beach |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,922 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,580 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 30,927 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,922 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 71,507 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 81,429 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 32,316 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 49,113 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPacificBeachMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Mission Ridge |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,710 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 10,924 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 11,263 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,710 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,187 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 24,897 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,213 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,684 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesMissionRidgeMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Cortez Hill |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,768 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,134 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 23,464 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,768 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,598 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 46,366 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 18,853 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 27,513 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACortezHillMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Fashion Valley |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 19,627 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 44,972 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 290 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 19,627 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,262 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 64,889 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,860 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 55,029 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFashionValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves San Marcos |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,277 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 13,385 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 860 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,277 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 14,245 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 17,522 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,869 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 15,653 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanMarcosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Rancho Penasquitos |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 6,692 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,143 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,834 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 6,692 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,977 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 35,669 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,697 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 31,972 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesRanchoPenasquitosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon La Jolla Colony |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 16,760 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,694 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,099 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 16,760 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 29,793 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 46,553 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,665 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,888 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 27,176 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonLaJollaColonyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves La Mesa |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,490 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,482 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,335 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,490 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 29,817 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,307 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,230 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 36,077 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLaMesaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Burbank |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 22,483 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 28,104 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 48,076 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 22,483 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 76,180 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 98,663 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 32,069 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 66,594 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVABurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Woodland Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 23,828 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,372 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 46,946 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 23,828 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 87,318 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 111,146 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 36,446 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 74,700 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Warner Center |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,045 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,986 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,304 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,045 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,290 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 29,335 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,017 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 16,318 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWarnerCenterMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon at Glendale |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 42,564 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,155 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 43,719 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 43,719 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 16,923 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 26,796 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtGlendaleMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Burbank |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 14,053 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 56,827 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 23,842 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 14,053 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 80,669 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 94,722 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 29,268 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 65,454 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBurbankMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Camarillo |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,446 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,290 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 142 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,446 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 40,432 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 48,878 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 12,232 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 36,646 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCamarilloMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Wilshire |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,459 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,182 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,045 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,459 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,227 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 47,686 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 11,268 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 36,418 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilshireMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Encino |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,789 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,073 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 395 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,789 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 49,468 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 62,257 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,812 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 51,445 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEncinoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Warner Place |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,920 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 44,848 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 183 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,920 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 45,031 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 52,951 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,522 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 42,429 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWarnerPlaceMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Phillips Ranch |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,796 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,740 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 246 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,796 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 41,986 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 51,782 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,516 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,266 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesPhillipsRanchMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves San Dimas |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 1,916 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 7,819 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 519 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 1,916 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 8,338 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 10,254 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,089 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 9,165 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves San Dimas Canyon |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 2,953 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,428 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 191 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 2,953 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,619 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 15,572 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,663 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 13,909 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesSanDimasCanyonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | AVA Pasadena |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,400 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 11,547 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5,388 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,400 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,935 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,335 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,319 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 24,016 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 11,683 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVAPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Cerritos |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 8,305 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 21,195 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,392 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 8,305 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,587 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 30,892 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,991 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 28,901 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesCerritosMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Del Rey |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 30,900 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 72,008 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 654 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 30,900 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 72,662 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 103,562 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,978 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 97,584 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelReyApartmentsLLCMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Simi Valley |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 42,020 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 73,361 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,411 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 42,020 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 77,772 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 119,792 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,158 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 110,634 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSimiValleyMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Studio City II |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,626 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,954 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,210 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,626 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,164 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 28,790 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,484 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 26,306 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Studio City III |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,756 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 78,178 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,418 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,756 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 81,596 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 97,352 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 8,428 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 88,924 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityIIIMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Calabasas |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 42,720 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 107,642 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 6,649 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 42,720 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 114,291 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 157,011 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,810 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 143,201 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 100,237 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonCalabasasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Oak Creek |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 43,540 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 79,974 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,277 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 43,540 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 84,251 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 127,791 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 10,304 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 117,487 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 85,288 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonOakCreekMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Santa Monica on Main |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 32,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 60,770 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,359 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 32,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 64,129 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 96,129 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,720 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 89,409 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSantaMonicaOnMainMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Del Mar Station |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 20,560 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 106,556 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,277 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 20,560 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 109,833 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 130,393 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,650 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 120,743 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 76,471 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDelMarStationMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Old Town Pasadena |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,110 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 15,371 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,188 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,110 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 16,559 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 25,669 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 2,053 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 23,616 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 15,669 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesOldTownPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Thousand Oaks |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 13,950 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,211 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,053 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 13,950 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,264 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 36,214 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,208 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,006 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 27,411 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesThousandOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Los Feliz |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 18,940 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 43,661 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 3,160 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 18,940 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 46,821 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 65,761 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 5,463 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 60,298 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 43,258 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesLosFelizMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Oakwood Toluca Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 85,450 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 161,256 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,933 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 85,450 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 171,189 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 256,639 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 20,490 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 236,149 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 165,561 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_OakwoodTolucaHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Eaves Woodland Hills |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 68,940 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 90,549 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 9,014 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 68,940 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 99,563 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 168,503 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 13,226 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 155,277 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 104,694 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_EavesWoodlandHillsMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Thousand Oaks Plaza |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 12,810 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 22,581 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,807 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 12,810 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 24,388 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 37,198 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,226 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,972 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 28,394 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonThousandOaksPlazaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Pasadena |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 10,240 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 31,558 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,808 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 10,240 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 33,366 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 43,606 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,503 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 40,103 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 28,079 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPasadenaMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Studio City |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 17,658 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 90,715 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 4,094 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 17,658 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 94,809 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 112,467 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 9,702 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 102,765 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonStudioCityMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon San Dimas |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,140 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,445 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,140 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 30,445 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 39,585 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 313 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 39,272 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonSanDimasMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Avalon Mission Oaks |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,600 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 34,540 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 2,860 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,600 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 37,400 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 47,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 93 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,907 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMissionOaksMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone Lexington |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 4,540 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 25,946 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,823 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 4,540 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 27,769 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 32,309 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,551 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 28,758 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Encumbrances | 16,525 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneLexingtonMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Archstone Toscano |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,607 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 72,154 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 5 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,607 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 72,159 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 87,766 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 3,324 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 84,442 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_ArchstoneToscanoMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Current Communities | Memorial Heights Villages |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 9,607 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,164 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 9,607 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 42,164 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total | 51,771 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Accumulated Depreciation | 724 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 51,047 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_MemorialHeightsVillagesMember / us-gaap_RealEstatePropertiesAxis = avb_CurrentCommunitiesMember |  |  |  |
Development Communities |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 32,309 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 446,342 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,357,880 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 32,309 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 1,804,222 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 1,836,531 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 6,482 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 1,830,049 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Encumbrances | 0 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon West Chelsea/AVA High Line |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 260,762 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 11,823 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 272,585 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 272,585 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 4,302 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 268,283 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestChelseaAVAHighLineMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon North Station |  |  |  |  |
Initial Cost |  |  |  |  |
Costs Subsequent to Acquisition / Construction | 46,268 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 46,268 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 46,268 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,268 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonNorthStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon AVA Assembly Row/AVA Somerville |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 15,239 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 80,685 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 33,327 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 15,239 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 114,012 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 129,251 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 1,095 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 128,156 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonatAssemblyRowAVASomervilleMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Framingham |  |  |  |  |
Initial Cost |  |  |  |  |
Costs Subsequent to Acquisition / Construction | 18,335 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFraminghamMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 18,335 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFraminghamMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 18,335 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFraminghamMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 18,335 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFraminghamMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon West Hollywood |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 233 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestHollywoodMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 57,895 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestHollywoodMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 58,128 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestHollywoodMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 58,128 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestHollywoodMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 58,128 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWestHollywoodMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Dublin Station II |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 84 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 43,338 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 43,422 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 43,422 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 43,422 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonDublinStationIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Wharton |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 874 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 20,455 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 27,318 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 874 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 47,773 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 48,647 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 116 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 48,531 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWhartonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Green III |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 4 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 1,443 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 1,447 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 1,447 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 1,447 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGreenIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | AVA Little Tokyo |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 5,479 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 35,923 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 64,425 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 5,479 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 100,348 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 105,827 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 423 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 105,404 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVALittleTokyoMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | AVA Theater District |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 315 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVATheaterDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 132,767 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVATheaterDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 133,082 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVATheaterDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 133,082 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVATheaterDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 133,082 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVATheaterDistrictMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Marlborough |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 95 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMarlboroughMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 46,808 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMarlboroughMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 46,903 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMarlboroughMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 46,903 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMarlboroughMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 46,903 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonMarlboroughMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Vista |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 292 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonVistaMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 36,338 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonVistaMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 36,630 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonVistaMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 36,630 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonVistaMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 36,630 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonVistaMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Bloomfield Station |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 56 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomfieldStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 29,624 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomfieldStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 29,680 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomfieldStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 29,680 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomfieldStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 29,680 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBloomfieldStationMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Willoughby Square/AVA DoBro |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 80 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilloughbySquareAVADoBroMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 266,238 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilloughbySquareAVADoBroMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 266,318 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilloughbySquareAVADoBroMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 266,318 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilloughbySquareAVADoBroMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 266,318 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonWilloughbySquareAVADoBroMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Alderwood I |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 7,033 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 32,783 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 26,290 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 7,033 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 59,073 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 66,106 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 492 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 65,614 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAlderwoodIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | AVA Capitol Hill |  |  |  |  |
Initial Cost |  |  |  |  |
Costs Subsequent to Acquisition / Construction | 39,870 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACapitolHillMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 39,870 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACapitolHillMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 39,870 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACapitolHillMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 39,870 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AVACapitolHillMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Esterra Park |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 8 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEsterraParkMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 33,515 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEsterraParkMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 33,523 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEsterraParkMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 33,523 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEsterraParkMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,523 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonEsterraParkMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Hayes Valley |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 887 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHayesValleyMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 78,685 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHayesValleyMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 79,572 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHayesValleyMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 79,572 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHayesValleyMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 79,572 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHayesValleyMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Baker Ranch |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 3,684 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 12,815 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 94,303 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Land | 3,684 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Building / Construction in Progress & Improvements | 107,118 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 110,802 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Accumulated Depreciation | 54 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 110,748 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonBakerRanchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Irvine III |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 50 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 26,253 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 26,303 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 26,303 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 26,303 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonIrvineIIIMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Huntington Beach |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 78 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 40,661 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 40,739 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 40,739 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 40,739 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonHuntingtonBeachMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Glendora |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 55 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlendoraMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 52,091 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlendoraMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 52,146 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlendoraMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 52,146 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlendoraMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 52,146 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonGlendoraMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Falls Church |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 240 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFallsChurchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 69,391 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFallsChurchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 69,631 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFallsChurchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 69,631 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFallsChurchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 69,631 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonFallsChurchMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Roseland |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 372 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRoselandMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 32,771 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRoselandMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 33,143 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRoselandMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 33,143 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRoselandMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 33,143 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonRoselandMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Princeton |  |  |  |  |
Initial Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 70 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 35,386 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 35,456 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 35,456 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 35,456 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonPrincetonMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Development Communities | Avalon Union |  |  |  |  |
Initial Cost |  |  |  |  |
Costs Subsequent to Acquisition / Construction | 12,717 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost |  |  |  |  |
Building / Construction in Progress & Improvements | 12,717 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total | 12,717 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 12,717 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonUnionMember / us-gaap_RealEstatePropertiesAxis = avb_DevelopmentCommunitiesMember |  |  |  |
Land Held for Development |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 180,516 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_LandHeldforDevelopmentMember |  |  |  |
Total Cost |  |  |  |  |
Land | 180,516 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_LandHeldforDevelopmentMember |  |  |  |
Total | 180,516 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_LandHeldforDevelopmentMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 180,516 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_LandHeldforDevelopmentMember |  |  |  |
Corporate overhead |  |  |  |  |
Initial Cost |  |  |  |  |
Land and improvements | 31,344 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Building / Construction in Progress & Improvements | 31,699 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Costs Subsequent to Acquisition / Construction | 56,338 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Total Cost |  |  |  |  |
Land | 31,344 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Building / Construction in Progress & Improvements | 88,037 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Total | 119,381 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Accumulated Depreciation | 48,834 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Total Cost, Net of Accumulated Depreciation | 70,547 avb_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Encumbrances | $ 3,000,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = avb_CorporateOverheadMember |  |  |  |
Subsequent event | Avalon at Edgewater |  |  |  |  |
Total Cost |  |  |  |  |
Number of uninhabitable homes |  |  |  |  | 240 avb_NumberOfUnitsInRealEstatePropertyUninhabitable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = avb_AvalonAtEdgewaterMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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