$AVB
AVALONBAY COMMUNITIES INC Stock $avb

$avb Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000104746913001516 Filed on February 22, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$243.1M	$239.6M	$231.2M
YoY Change	7.3%	7.8%	7.53%
Cost Of Revenue	$87.70M	$87.20M	$85.90M
YoY Change	3.42%	-2.13%	5.01%
Gross Profit	$155.4M	$143.5M	$149.7M
YoY Change	17.82%	5.13%	11.3%
Gross Profit Margin	63.93%	59.9%	64.74%
Selling, General & Admin	$7.800M	$6.100M	$8.100M
YoY Change	13.04%	-12.86%	102.5%
% of Gross Profit	5.02%	4.25%	5.41%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$58.10M	$60.90M	$60.40M
YoY Change	14.37%	7.79%	5.41%
% of Gross Profit	37.39%	42.44%	40.35%
Operating Expenses	$68.80M	$215.7M	$200.7M
YoY Change	6.01%	232.36%	234.57%
Operating Profit	$86.60M	-$72.20M	-$51.04M
YoY Change	29.25%	-200.84%	-168.51%
Interest Expense	-$36.00M	-$40.10M	-$44.10M
YoY Change	-13.67%	-10.09%	7.56%
% of Operating Profit	-41.57%
Other Income/Expense, Net
YoY Change
Pretax Income	$48.30M	$38.40M	$35.20M
YoY Change	99.59%	46.56%	6.34%
Income Tax	$0.00	$0.00	$0.00
% Of Pretax Income	0.0%	0.0%	0.0%
Net Earnings	$329.1M	$44.68M	$43.40M
YoY Change	1118.89%	80.88%	-15.07%
Net Earnings / Revenue	135.38%	18.65%	18.77%
Basic Earnings Per Share	$3.40	$0.49	$0.50
Diluted Earnings Per Share	$3.38	$0.49	$0.49
COMMON SHARES
Basic Shares Outstanding		91.39M shares	87.32M shares
Diluted Shares Outstanding		92.34M shares	88.20M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$617.0M	$690.0M	$290.0M
YoY Change	102.96%	201.31%	-22.46%
Cash & Equivalents	$616.9M	$690.0M	$290.1M
Short-Term Investments
Other Short-Term Assets	$141.0M	$151.0M	$142.0M
YoY Change	5.22%	32.46%	65.12%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$758.0M	$841.0M	$432.0M
YoY Change	73.06%	145.19%	-6.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$7.253B	$7.257B	$7.169B
YoY Change	5.85%	4.9%	4.78%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$145.0M	$131.0M	$119.0M
YoY Change	18.85%	39.36%	67.61%
Other Assets	$304.0M	$235.0M	$199.0M
YoY Change	-21.45%	-20.88%	-35.81%
Total Long-Term Assets	$7.724B	$7.648B	$7.511B
YoY Change	4.62%	4.32%	3.67%
TOTAL ASSETS
Total Short-Term Assets	$758.0M	$841.0M	$432.0M
Total Long-Term Assets	$7.724B	$7.648B	$7.511B
Total Assets	$8.482B	$8.489B	$7.943B
YoY Change	8.46%	10.62%	3.09%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$37.00M	$36.00M	$34.00M
YoY Change	8.82%	-5.26%	-20.93%
Accrued Expenses	$280.0M	$259.0M	$320.0M
YoY Change	71.78%	-1.89%	23.55%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$438.0M	$417.0M	$470.0M
YoY Change	42.67%	1.21%	14.08%
LONG-TERM LIABILITIES
Long-Term Debt	$3.599B	$3.785B	$3.986B
YoY Change	-9.41%	-4.13%	0.94%
Other Long-Term Liabilities	$37.00M	$123.0M
YoY Change	-82.46%
Total Long-Term Liabilities	$3.636B	$3.908B	$3.986B
YoY Change	-13.1%	-1.01%	0.94%
TOTAL LIABILITIES
Total Short-Term Liabilities	$438.0M	$417.0M	$470.0M
Total Long-Term Liabilities	$3.636B	$3.908B	$3.986B
Total Liabilities	$4.073B	$4.340B	$4.468B
YoY Change	-9.7%	-0.8%	2.24%
SHAREHOLDERS EQUITY
Retained Earnings	-$171.6M
YoY Change
Common Stock	$952.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.395B	$4.149B	$3.475B
YoY Change
Total Liabilities & Shareholders Equity	$8.482B	$8.489B	$7.943B
YoY Change	8.46%	10.62%	3.09%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	$329.1M	$44.68M	$43.40M
YoY Change	1118.89%	80.88%	-15.07%
Depreciation, Depletion And Amortization	$58.10M	$60.90M	$60.40M
YoY Change	14.37%	7.79%	5.41%
Cash From Operating Activities	$134.4M	$89.10M	$132.7M
YoY Change	37.56%	42.11%	29.09%
INVESTING ACTIVITIES
Capital Expenditures	-$211.2M	-$197.8M	-$211.6M
YoY Change	98.31%	95.65%	77.82%
Acquisitions
YoY Change
Other Investing Activities	$237.5M	$21.40M	$43.20M
YoY Change	-1796.43%	-149.42%	-64.3%
Cash From Investing Activities	$26.40M	-$176.5M	-$168.3M
YoY Change	-121.89%	22.31%	-8515.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-232.7M	488.1M	34.00M
YoY Change	-332.24%	-875.99%	-76.63%
NET CHANGE
Cash From Operating Activities	134.4M	89.10M	132.7M
Cash From Investing Activities	26.40M	-176.5M	-168.3M
Cash From Financing Activities	-232.7M	488.1M	34.00M
Net Change In Cash	-71.90M	400.7M	-1.600M
YoY Change	-193.01%	-377.3%	-100.64%
FREE CASH FLOW
Cash From Operating Activities	$134.4M	$89.10M	$132.7M
Capital Expenditures	-$211.2M	-$197.8M	-$211.6M
Free Cash Flow	$345.6M	$286.9M	$344.3M
YoY Change	69.25%	75.15%	55.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	25
CY2011Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	25
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	140000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	140000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	95175677	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	95175677	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	114403472	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	114403472	shares
CY2012	avb	Rental And Other Income RentalAndOtherIncome	1028403000	USD
CY2012	us-gaap	Management Fees Revenue ManagementFeesRevenue	10257000	USD
CY2012	us-gaap	Revenues Revenues	1038660000	USD
CY2012	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	278481000	USD
CY2012	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	101136000	USD
CY2012	avb	Interest Expense Net InterestExpenseNet	136920000	USD
CY2012	avb	Gains Losses On Extinguishment Of Debt From Continuing Operations GainsLossesOnExtinguishmentOfDebtFromContinuingOperations	-1179000	USD
CY2012	us-gaap	Cost Of Services Depreciation CostOfServicesDepreciation	256026000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34101000	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	809292000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	20914000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	280000	USD
CY2012	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	14194000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	264756000	USD
CY2012	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	12495000	USD
CY2012	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	146311000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	158806000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	423869000	USD
CY2011	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	20000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.89
CY2010	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	30246000	USD
CY2011	avb	Expensed Acquisition Development And Other Pursuit Costs ExpensedAcquisitionDevelopmentAndOtherPursuitCosts	2967000	USD
CY2010	avb	Expensed Acquisition Development And Other Pursuit Costs ExpensedAcquisitionDevelopmentAndOtherPursuitCosts	2741000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	423562000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-307000	USD
CY2012	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-22876000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	402882000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.71
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.63
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.34
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.70
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.62
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.32
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.69
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	3.20
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.69
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	3.18
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.87
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.10
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.98
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.10
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.97
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2011	avb	Rental And Other Income RentalAndOtherIncome	926431000	USD
CY2011	us-gaap	Management Fees Revenue ManagementFeesRevenue	9656000	USD
CY2011	us-gaap	Revenues Revenues	936087000	USD
CY2011	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	257718000	USD
CY2011	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	92568000	USD
CY2011	avb	Interest Expense Net InterestExpenseNet	167814000	USD
CY2011	avb	Gains Losses On Extinguishment Of Debt From Continuing Operations GainsLossesOnExtinguishmentOfDebtFromContinuingOperations	-1940000	USD
CY2011	us-gaap	Cost Of Services Depreciation CostOfServicesDepreciation	239060000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	29371000	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	802523000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5120000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	13716000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	92055000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	152400000	USD
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	7880000	USD
CY2011	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	281090000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	288970000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	441370000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-252000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	441622000	USD
CY2011	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-85845000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	355777000	USD
CY2010	avb	Rental And Other Income RentalAndOtherIncome	835466000	USD
CY2010	us-gaap	Management Fees Revenue ManagementFeesRevenue	7354000	USD
CY2010	us-gaap	Revenues Revenues	842820000	USD
CY2010	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	246257000	USD
CY2010	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	87864000	USD
CY2010	avb	Interest Expense Net InterestExpenseNet	169997000	USD
CY2010	us-gaap	Cost Of Services Depreciation CostOfServicesDepreciation	220563000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	26846000	USD
CY2010	us-gaap	Operating Expenses OperatingExpenses	751527000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	762000	USD
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	7950000	USD
CY2010	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	74074000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	82024000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	174079000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1252000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	175331000	USD
CY2010	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-108000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	175223000	USD
CY2011	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	11209000	USD
CY2010	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	12379000	USD
CY2010	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	7723000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	5938000	USD
CY2011	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	5834000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	7244000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5820000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-2246000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-1852000	USD
CY2011	avb	Increase Decrease In Cash In Construction Escrows IncreaseDecreaseInCashInConstructionEscrows	-14109000	USD
CY2010	avb	Increase Decrease In Cash In Construction Escrows IncreaseDecreaseInCashInConstructionEscrows	-42329000	USD
CY2011	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	1701000	USD
CY2010	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	24000000	USD
CY2012	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	146591000	USD
CY2011	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	294806000	USD
CY2010	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	74074000	USD
CY2011	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1010000	USD
CY2011	avb	Increase Decrease In Cash In Operating Escrows IncreaseDecreaseInCashInOperatingEscrows	7702000	USD
CY2010	avb	Increase Decrease In Cash In Operating Escrows IncreaseDecreaseInCashInOperatingEscrows	4996000	USD
CY2010	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3876000	USD
CY2011	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	9045000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	540819000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	429354000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	332106000	USD
CY2011	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	640778000	USD
CY2010	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	429853000	USD
CY2011	us-gaap	Payments To Acquire Other Real Estate PaymentsToAcquireOtherRealEstate	46275000	USD
CY2011	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	41851000	USD
CY2010	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	16772000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	420000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	8281000	USD
CY2012	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	274018000	USD
CY2011	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	310228000	USD
CY2010	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	194009000	USD
CY2010	avb	Proceeds From Payments For Construction Payables ProceedsFromPaymentsForConstructionPayables	15190000	USD
CY2011	avb	Proceeds From Payments For Construction Payables ProceedsFromPaymentsForConstructionPayables	-2342000	USD
CY2011	avb	Payments To Acquire Proceeds From Businesses And Interest In Affiliates PaymentsToAcquireProceedsFromBusinessesAndInterestInAffiliates	30934000	USD
CY2010	avb	Payments To Acquire Proceeds From Businesses And Interest In Affiliates PaymentsToAcquireProceedsFromBusinessesAndInterestInAffiliates	49039000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-298936000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-443141000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-623386000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1049835000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	381365000	USD
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	318231000	USD
CY2010	us-gaap	Payments Of Dividends PaymentsOfDividends	298090000	USD
CY2011	avb	Repayments Of Secured Debt Conventional And Tax Exempt RepaymentsOfSecuredDebtConventionalAndTaxExempt	200166000	USD
CY2010	avb	Repayments Of Secured Debt Conventional And Tax Exempt RepaymentsOfSecuredDebtConventionalAndTaxExempt	69327000	USD
CY2012	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	700000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	250000000	USD
CY2012	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	54930000	USD
CY2012	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	381001000	USD
CY2011	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	189900000	USD
CY2010	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	89576000	USD
CY2010	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6524000	USD
CY2011	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5996000	USD
CY2011	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	25000	USD
CY2012	avb	Payments To Acquire Joint Venture Partner Equity Interest PaymentsToAcquireJointVenturePartnerEquityInterest	3350000	USD
CY2011	avb	Payments To Acquire Joint Venture Partner Equity Interest PaymentsToAcquireJointVenturePartnerEquityInterest	9070000	USD
CY2011	us-gaap	Payments For Proceeds From Real Estate Partnership Investment Net PaymentsForProceedsFromRealEstatePartnershipInvestmentNet	194000	USD
CY2010	us-gaap	Payments For Proceeds From Real Estate Partnership Investment Net PaymentsForProceedsFromRealEstatePartnershipInvestmentNet	222000	USD
CY2010	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	61000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	167565000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	326233000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2199332000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	312446000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	200735000	USD
CY2012Q4	us-gaap	Secured Debt SecuredDebt	1905235000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	156898000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	157014000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	304407000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	103672000	USD
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012Q4	us-gaap	Land Land	1440590000	USD
CY2012Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7185853000	USD
CY2012Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	255733000	USD
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	8882176000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	2034364000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6847812000	USD
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	802883000	USD
CY2012Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	316037000	USD
CY2012Q4	avb	Net Investments In Real Estate NetInvestmentsInRealEstate	8015120000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2733618000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	50033000	USD
CY2012Q4	us-gaap	Security Deposit SecurityDeposit	24748000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	129352000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	38700000	USD
CY2012Q4	us-gaap	Deferred Costs DeferredCosts	24665000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	143842000	USD
CY2012Q4	us-gaap	Assets Assets	11160078000	USD
CY2012Q4	us-gaap	Unsecured Debt UnsecuredDebt	1945798000	USD
CY2012Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	110966000	USD
CY2012Q4	us-gaap	Construction Payable Current And Noncurrent ConstructionPayableCurrentAndNoncurrent	53677000	USD
CY2012Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	224194000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	33056000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	38626000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	4312258000	USD
CY2012Q4	us-gaap	Temporary Equity Redemption Value TemporaryEquityRedemptionValue	7027000	USD
CY2011Q4	us-gaap	Land Land	1312538000	USD
CY2011Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	6574297000	USD
CY2011Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	223161000	USD
CY2011Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	8109996000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	AVALONBAY COMMUNITIES INC
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000915912
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2011Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1780309000	USD
CY2011Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6329687000	USD
CY2011Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	597303000	USD
CY2011Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	325918000	USD
CY2011Q4	avb	Net Investments In Real Estate NetInvestmentsInRealEstate	7425030000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	616853000	USD
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	73400000	USD
CY2011Q4	us-gaap	Security Deposit SecurityDeposit	23597000	USD
CY2011Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	144561000	USD
CY2011Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	33653000	USD
CY2011Q4	us-gaap	Deferred Costs DeferredCosts	24770000	USD
CY2011Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	140526000	USD
CY2011Q4	us-gaap	Assets Assets	8482390000	USD
CY2011Q4	us-gaap	Unsecured Debt UnsecuredDebt	1629210000	USD
CY2011Q4	us-gaap	Secured Debt SecuredDebt	1969986000	USD
CY2011Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	84953000	USD
CY2011Q4	us-gaap	Construction Payable Current And Noncurrent ConstructionPayableCurrentAndNoncurrent	36845000	USD
CY2011Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	245520000	USD
CY2011Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	34210000	USD
CY2011Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	35968000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	4073435000	USD
CY2011Q4	us-gaap	Temporary Equity Redemption Value TemporaryEquityRedemptionValue	7063000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	1144000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	952000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	7086407000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-142329000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-108007000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	6837215000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	3578000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6840793000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11160078000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4652457000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-171648000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-87020000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	4394741000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	7151000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4401892000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8482390000	USD
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	84632869	shares
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	396346	shares
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	457419	shares
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	49556000	USD
CY2010	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	33393000	USD
CY2011	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	33863000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	12386000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	440450000	USD
CY2011	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-2607000	USD
CY2011	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	3350000	USD
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	326813000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1035302000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22464000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3315591000	USD
CY2012Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	180	community
CY2012Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	52792	home
CY2012Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	9	state
CY2012Q4	avb	Number Of Communities With Apartments Under Reconstruction NumberOfCommunitiesWithApartmentsUnderReconstruction	5	community
CY2012Q4	avb	Number Of Apartment Homes Under Reconstruction NumberOfApartmentHomesUnderReconstruction	1787	home
CY2012Q4	avb	Number Of Owned Communities Under Construction NumberOfOwnedCommunitiesUnderConstruction	23	community
CY2012Q4	avb	Expected Aggregate Number Of Apartment Homes To Be Constructed ExpectedAggregateNumberOfApartmentHomesToBeConstructed	6599	home
CY2012Q4	avb	Additional Number Of Communities Owned That Can Be Developed AdditionalNumberOfCommunitiesOwnedThatCanBeDeveloped	34	community
CY2012Q4	avb	Equity Method Investment Summarized Financial Information Real Estate Net EquityMethodInvestmentSummarizedFinancialInformationRealEstateNet	1337084000	USD
CY2012Q4	avb	Equity Method Investment Summarized Financial Information Assets Other Assets EquityMethodInvestmentSummarizedFinancialInformationAssetsOtherAssets	73252000	USD
CY2012Q4	avb	Estimated Number Of Apartment Homes In Communities Expected To Be Developed EstimatedNumberOfApartmentHomesInCommunitiesExpectedToBeDeveloped	9602	home
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97416401	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89922465	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83859936	shares
CY2012	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	7500	shares
CY2011	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	8322	shares
CY2010	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	15321	shares
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	601251	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	846675	shares
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	757612	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	98025152	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90777462	shares
CY2012	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	1264000	USD
CY2011	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	1631000	USD
CY2010	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	498000	USD
CY2012	us-gaap	Undistributed Earnings UndistributedEarnings	422605000	USD
CY2011	us-gaap	Undistributed Earnings UndistributedEarnings	439991000	USD
CY2010	us-gaap	Undistributed Earnings UndistributedEarnings	174833000	USD
CY2012	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-28000	USD
CY2011	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-27000	USD
CY2010	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-55000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	423897000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	441649000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	175386000	USD
CY2012Q4	us-gaap	Notes Payable NotesPayable	3854068000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	3854068000	USD
CY2011Q4	us-gaap	Notes Payable NotesPayable	3600025000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	3600025000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	4202000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	1802000	USD
CY2011Q4	avb	Debt Basis Adjustment DebtBasisAdjustment	11000	USD
CY2012Q4	avb	Debt Basis Adjustment DebtBasisAdjustment	0	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	1167000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	962000	USD
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	407784	shares
CY2012	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2331	shares
CY2012	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	96592	shares
CY2012	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	121351	shares
CY2012	us-gaap	Stock Issued During Period Shares Restricted Stock Award Forfeited StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	4027	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	115303	shares
CY2011Q4	avb	Equity Method Investment Summarized Financial Information Real Estate Net EquityMethodInvestmentSummarizedFinancialInformationRealEstateNet	1583397000	USD
CY2011Q4	avb	Equity Method Investment Summarized Financial Information Assets Other Assets EquityMethodInvestmentSummarizedFinancialInformationAssetsOtherAssets	70233000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	1410336000	USD
CY2011Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	1653630000	USD
CY2012Q4	avb	Equity Method Investment Summarized Financial Information Mortgage Notes Payable And Credit Facility EquityMethodInvestmentSummarizedFinancialInformationMortgageNotesPayableAndCreditFacility	943259000	USD
CY2011Q4	avb	Equity Method Investment Summarized Financial Information Mortgage Notes Payable And Credit Facility EquityMethodInvestmentSummarizedFinancialInformationMortgageNotesPayableAndCreditFacility	1074429000	USD
CY2012Q4	avb	Equity Method Investment Summarized Financial Information Liabilities Other Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOtherLiabilities	20405000	USD
CY2011Q4	avb	Equity Method Investment Summarized Financial Information Liabilities Other Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOtherLiabilities	27335000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	446672000	USD
CY2011Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	551866000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	1410336000	USD
CY2011Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	1653630000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	172076000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	160066000	USD
CY2010	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	114755000	USD
CY2012	avb	Equity Method Investment Summarized Financial Information Operating And Other Expenses EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOtherExpenses	73955000	USD
CY2011	avb	Equity Method Investment Summarized Financial Information Operating And Other Expenses EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOtherExpenses	71926000	USD
CY2010	avb	Equity Method Investment Summarized Financial Information Operating And Other Expenses EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOtherExpenses	56322000	USD
CY2012	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	106195000	USD
CY2012	avb	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	53904000	USD
CY2011	avb	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	50530000	USD
CY2010	avb	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	40050000	USD
CY2011	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	22246000	USD
CY2012	avb	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	47748000	USD
CY2011	avb	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	47920000	USD
CY2010	avb	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	36631000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	102664000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	11936000	USD
CY2010	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-18248000	USD
CY2012	avb	Expensed Acquisition Development And Other Pursuit Costs ExpensedAcquisitionDevelopmentAndOtherPursuitCosts	11350000	USD
CY2012	avb	Number Of Apartment Communities Sold NumberOfApartmentCommunitiesSold	4	home
CY2012	us-gaap	Proceeds From Sale Of Land Heldforinvestment ProceedsFromSaleOfLandHeldforinvestment	145271000	USD
CY2012	us-gaap	Disposal Group Including Discontinued Operation Rental Income DisposalGroupIncludingDiscontinuedOperationRentalIncome	25373000	USD
CY2011	us-gaap	Disposal Group Including Discontinued Operation Rental Income DisposalGroupIncludingDiscontinuedOperationRentalIncome	53290000	USD
CY2010	us-gaap	Disposal Group Including Discontinued Operation Rental Income DisposalGroupIncludingDiscontinuedOperationRentalIncome	56705000	USD
CY2012	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	8075000	USD
CY2011	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	25513000	USD
CY2010	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	31164000	USD
CY2012	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	133000	USD
CY2011	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	4808000	USD
CY2010	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	5212000	USD
CY2012	avb	Disposal Group Including Discontinued Operation Gain Loss On Extinguishment Of Debt DisposalGroupIncludingDiscontinuedOperationGainLossOnExtinguishmentOfDebt	-602000	USD
CY2012	us-gaap	Depreciation And Amortization Discontinued Operations DepreciationAndAmortizationDiscontinuedOperations	4068000	USD
CY2012	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	31911000	USD
CY2011	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	30550000	USD
CY2012	us-gaap	Asset Management Costs AssetManagementCosts	6071000	USD
CY2011	us-gaap	Asset Management Costs AssetManagementCosts	5126000	USD
CY2010	us-gaap	Asset Management Costs AssetManagementCosts	3824000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	708375000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	624444000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	545510000	USD
CY2012	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	1038660000	USD
CY2012	avb	Percentage Change Of Net Operating Income From Prior Year PercentageChangeOfNetOperatingIncomeFromPriorYear	0.142	pure
CY2012Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10071342000	USD
CY2011	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	936087000	USD
CY2011	avb	Percentage Change Of Net Operating Income From Prior Year PercentageChangeOfNetOperatingIncomeFromPriorYear	0.145	pure
CY2011Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	9288496000	USD
CY2010	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	842820000	USD
CY2010	avb	Percentage Change Of Net Operating Income From Prior Year PercentageChangeOfNetOperatingIncomeFromPriorYear	0.046	pure
CY2010Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	8661211000	USD
CY2012Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	70246000	USD
CY2011Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	255274000	USD
CY2010Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	398679000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9721000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9906000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5140000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5284000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5117000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9961000	USD
CY2010	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4203000	USD
CY2012Q2	dei	Entity Public Float EntityPublicFloat	13575349301	USD
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	114405582.	shares
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2010	us-gaap	Net Income Loss NetIncomeLoss	176259000	USD
CY2010	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-5573000	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2012	avb	Long Term Debt Redemption Price As Percentage Of Principal Amount LongTermDebtRedemptionPriceAsPercentageOfPrincipalAmount	1.00	pure
CY2012	avb	Minimum Percentage Of Distribution Of Adjusted Taxable Income For Deducting Dividends From Federally Taxable Income MinimumPercentageOfDistributionOfAdjustedTaxableIncomeForDeductingDividendsFromFederallyTaxableIncome	0.90	pure
CY2012	avb	Minimum Percentage Of Distribution Of Reit Taxable Income For Federal Income Tax Exemption MinimumPercentageOfDistributionOfREITTaxableIncomeForFederalIncomeTaxExemption	1.00	pure
CY2012	avb	Refunds Of Federal Excise Taxes RefundsOfFederalExciseTaxes	235000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Gain On Sale Of Communities ReconciliationOfIncomeFromBookBasisToTaxBasisGainOnSaleOfCommunities	84152000	USD
CY2010	avb	Reconciliation Of Income From Book Basis To Tax Basis Gain On Sale Of Communities ReconciliationOfIncomeFromBookBasisToTaxBasisGainOnSaleOfCommunities	-3812000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortization	9192000	USD
CY2010	avb	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortization	8266000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Compensation Expense ReconciliationOfIncomeFromBookBasisToTaxBasisCompensationExpense	43145000	USD
CY2010	avb	Reconciliation Of Income From Book Basis To Tax Basis Compensation Expense ReconciliationOfIncomeFromBookBasisToTaxBasisCompensationExpense	12202000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Impairment Loss ReconciliationOfIncomeFromBookBasisToTaxBasisImpairmentLoss	14052000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Other Adjustments ReconciliationOfIncomeFromBookBasisToTaxBasisOtherAdjustments	183000	USD
CY2010	avb	Reconciliation Of Income From Book Basis To Tax Basis Other Adjustments ReconciliationOfIncomeFromBookBasisToTaxBasisOtherAdjustments	12628000	USD
CY2011	avb	Reconciliation Of Income From Book Basis To Tax Basis Net Income Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisNetIncomeLossTaxBasis	337752000	USD
CY2010	avb	Reconciliation Of Income From Book Basis To Tax Basis Net Income Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisNetIncomeLossTaxBasis	187835000	USD
CY2011	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.34	pure
CY2011	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.47	pure
CY2011	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.19	pure
CY2010	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.74	pure
CY2010	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.11	pure
CY2010	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.15	pure
CY2012	avb	Sale Of Real Estate Gross Sales Price SaleOfRealEstateGrossSalesPrice	280550000	USD
CY2011	avb	Sale Of Real Estate Gross Sales Price SaleOfRealEstateGrossSalesPrice	292965000	USD
CY2010	avb	Sale Of Real Estate Gross Sales Price SaleOfRealEstateGrossSalesPrice	198600000	USD
CY2012	avb	Attainment Percentage Of Physical Occupancy AttainmentPercentageOfPhysicalOccupancy	0.95	pure
CY2012	avb	Anniversary Of Completion Of Development Or Redevelopment AnniversaryOfCompletionOfDevelopmentOrRedevelopment	P1Y
CY2011	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	129762	shares
CY2010	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	48882	shares
CY2012	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	15543000	USD
CY2011	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	14891000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	3935000	USD
CY2012	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	7558	shares
CY2011	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	505	shares
CY2010	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	1300	shares
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	393000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	35000	USD
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	39000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	115303	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	144827	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	126484	shares
CY2012	avb	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodValue	3357000	USD
CY2011	avb	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodValue	4258000	USD
CY2010	avb	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodValue	2460000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	22876000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	85845000	USD
CY2010	avb	Increase Decrease In Other Comprehensive Income Due To Change In Prepaid Expenses And Other Assets IncreaseDecreaseInOtherComprehensiveIncomeDueToChangeInPrepaidExpensesAndOtherAssets	-108000	USD
CY2012	avb	Unsecured Notes Basis Adjustment Qualifying As Hedges Before Tax Prepaid Expenses And Other Assets UnsecuredNotesBasisAdjustmentQualifyingAsHedgesBeforeTaxPrepaidExpensesAndOtherAssets	-11000	USD
CY2011	avb	Unsecured Notes Basis Adjustment Qualifying As Hedges Before Tax Prepaid Expenses And Other Assets UnsecuredNotesBasisAdjustmentQualifyingAsHedgesBeforeTaxPrepaidExpensesAndOtherAssets	-1498000	USD
CY2010	avb	Unsecured Notes Basis Adjustment Qualifying As Hedges Before Tax Prepaid Expenses And Other Assets UnsecuredNotesBasisAdjustmentQualifyingAsHedgesBeforeTaxPrepaidExpensesAndOtherAssets	1737000	USD
CY2012	avb	Common Dividends Declared But Not Paid CommonDividendsDeclaredButNotPaid	110966000	USD
CY2011	avb	Common Dividends Declared But Not Paid CommonDividendsDeclaredButNotPaid	84953000	USD
CY2010	avb	Common Dividends Declared But Not Paid CommonDividendsDeclaredButNotPaid	76676000	USD
CY2012	avb	Minority Interest Increase Decrease From Put Option Redemption Value Adjustment MinorityInterestIncreaseDecreaseFromPutOptionRedemptionValueAdjustment	375000	USD
CY2011	avb	Minority Interest Increase Decrease From Put Option Redemption Value Adjustment MinorityInterestIncreaseDecreaseFromPutOptionRedemptionValueAdjustment	2607000	USD
CY2010	avb	Minority Interest Increase Decrease From Put Option Redemption Value Adjustment MinorityInterestIncreaseDecreaseFromPutOptionRedemptionValueAdjustment	5573000	USD
CY2011	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	511817	shares
CY2010	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	102984	shares
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	12883000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	64747000	USD
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	7777000	USD
CY2011	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	3343	shares
CY2010	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	5687	shares
CY2012	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	321000	USD
CY2011	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	403000	USD
CY2010	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	525000	USD
CY2011	avb	Minority Interest Increase Decrease MinorityInterestIncreaseDecrease	3350000	USD
CY2010	avb	Minority Interest Increase Decrease MinorityInterestIncreaseDecrease	4045000	USD
CY2011	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	7500	shares
CY2010	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	25	shares
CY2011	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	365000	USD
CY2010	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	3000	USD
CY2011	avb	Repayment Of Tax Exempt Bond RepaymentOfTaxExemptBond	93440000	USD
CY2010	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	61055	shares
CY2010	avb	Stock Issued During Period Net Value StockIssuedDuringPeriodNetValue	3322000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3050127000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	98412000	USD
CY2011Q4	us-gaap	Revenues Revenues	243089000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	53674000	USD
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.88
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	58409000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	84432000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	68237000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	28579000	USD
CY2012Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	20773000	USD
CY2011Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	17574000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2315000	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="FONT-FAMILY: times"><font size="2"><i>Use of Estimates</i></font></p> <p style="FONT-FAMILY: times"><font size="2">        The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.</font></p></div>
CY2012	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="FONT-FAMILY: times"><font size="2"><i>Reclassifications</i></font></p> <p style="FONT-FAMILY: times"><font size="2">        Certain reclassifications have been made to amounts in prior years' financial statements to conform to current year presentations.</font></p></div>
CY2012	avb	Period Of Lease Life PeriodOfLeaseLife	P1Y
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.57
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.57
CY2012	us-gaap	Payments For Restructuring PaymentsForRestructuring	1757000	USD
CY2011	us-gaap	Payments For Restructuring PaymentsForRestructuring	1957000	USD
CY2010	us-gaap	Payments For Restructuring PaymentsForRestructuring	2741000	USD
CY2011	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1955000	USD
CY2012Q4	avb	Number Of Communities Held For Sale NumberOfCommunitiesHeldForSale	1	community
CY2012Q4	avb	Maximum Ownership Interest Percentage In Joint Venture MaximumOwnershipInterestPercentageInJointVenture	1.00	pure
CY2012Q1	us-gaap	Revenues Revenues	246032000	USD
CY2012Q2	us-gaap	Revenues Revenues	254172000	USD
CY2012Q3	us-gaap	Revenues Revenues	267151000	USD
CY2012Q4	us-gaap	Revenues Revenues	271303000	USD
CY2011Q1	us-gaap	Revenues Revenues	222495000	USD
CY2011Q2	us-gaap	Revenues Revenues	231218000	USD
CY2011Q3	us-gaap	Revenues Revenues	239568000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	33229000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	42410000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	48278000	USD
CY2010	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	174091000	USD
CY2009Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1526604000	USD
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	54147000	USD
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	1958000	USD
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	9963000	USD
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2267000	USD
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	274687000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	57758000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	156909000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86844000	USD
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	122356000	USD
CY2011Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	30341000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43373000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	44824000	USD
CY2011Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	323085000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.64
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.89
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.19
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.50
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.40
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.63
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.89
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.19
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.38
CY2012	avb	Number Of Executives In Employment Agreements NumberOfExecutivesInEmploymentAgreements	3	person
CY2011	avb	Settlement Proceeds Related To Environmental Contamination Matters SettlementProceedsRelatedToEnvironmentalContaminationMatters	1303000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	17604000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	16887000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	35356000	USD
CY2007	us-gaap	Long Term Purchase Commitment Amount LongTermPurchaseCommitmentAmount	111000000	USD
CY2012Q4	us-gaap	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	9901570000	USD
CY2012	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	934935000	USD
CY2011	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	864439000	USD
CY2010	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	475211000	USD
CY2012	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	152089000	USD
CY2011	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	237154000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2414775000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	17098000	USD
CY2010Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1705567000	USD
CY2011Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1863466000	USD
CY2012Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	2056222000	USD
CY2012	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	260094000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	250269000	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	232942000	USD
CY2012	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	67338000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	92370000	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	53979000	USD
CY2009Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	8360091000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	17996000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	18443000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	18390000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	18182000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	17668000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1178392000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	2427000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	2667000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	1954000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	19154000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	921000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	43366000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due Current TotalLeasesFutureMinimumPaymentsDueCurrent	20423000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due In Two Years TotalLeasesFutureMinimumPaymentsDueInTwoYears	21110000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due In Three Years TotalLeasesFutureMinimumPaymentsDueInThreeYears	20344000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due In Four Years TotalLeasesFutureMinimumPaymentsDueInFourYears	37336000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due In Five Years TotalLeasesFutureMinimumPaymentsDueInFiveYears	18589000	USD
CY2012Q4	avb	Total Leases Future Minimum Payments Due Thereafter TotalLeasesFutureMinimumPaymentsDueThereafter	1221758000	USD
CY2012Q4	avb	Total Imputed Interest On Capital Leases Future Minimum Payments Due TotalImputedInterestOnCapitalLeasesFutureMinimumPaymentsDue	35728000	USD
CY2012	avb	Compensation Multiplier In Case One CompensationMultiplierInCaseOne	2	multiplier
CY2012	avb	Compensation Multiplier In Case One In Connection With Sale Of Company CompensationMultiplierInCaseOneInConnectionWithSaleOfCompany	3	multiplier
CY2012	avb	Compensation Multiplier In Case Two CompensationMultiplierInCaseTwo	1	multiplier
CY2012	avb	Compensation Multiplier In Case Two In Connection With Sale Of Company CompensationMultiplierInCaseTwoInConnectionWithSaleOfCompany	2	multiplier
CY2012	avb	Number Of Executives In Case One NumberOfExecutivesInCaseOne	2	person
CY2012	avb	Number Of Executives In Case Two NumberOfExecutivesInCaseTwo	1	person
CY2012Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	48388000	USD
CY2011Q4	us-gaap	Inventory Real Estate Held For Sale InventoryRealEstateHeldForSale	172122000	USD
CY2012Q4	us-gaap	Liabilities Of Assets Held For Sale LiabilitiesOfAssetsHeldForSale	706000	USD
CY2011Q4	us-gaap	Liabilities Of Assets Held For Sale LiabilitiesOfAssetsHeldForSale	36743000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	423869000	USD
CY2012	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-375000	USD
CY2010	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	4045000	USD
CY2010	us-gaap	Dividends Common Stock DividendsCommonStock	302518000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	391906000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	380973000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Compensation Expense ReconciliationOfIncomeFromBookBasisToTaxBasisCompensationExpense	19218000	USD
CY2012	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6427000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	8707000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	12103000	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1781000	USD
CY2012	avb	Increase Decrease In Cash In Operating Escrows IncreaseDecreaseInCashInOperatingEscrows	-6543000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1601000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5028000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	15234000	USD
CY2012	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-4737000	USD
CY2012	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	755363000	USD
CY2012	us-gaap	Payments To Acquire Other Real Estate PaymentsToAcquireOtherRealEstate	155755000	USD
CY2012	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	23452000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3076000	USD
CY2012	avb	Proceeds From Payments For Construction Payables ProceedsFromPaymentsForConstructionPayables	-16832000	USD
CY2012	avb	Increase Decrease In Cash In Construction Escrows IncreaseDecreaseInCashInConstructionEscrows	-16824000	USD
CY2012	avb	Payments To Acquire Proceeds From Businesses And Interest In Affiliates PaymentsToAcquireProceedsFromBusinessesAndInterestInAffiliates	-6586000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2430190000	USD
CY2012	us-gaap	Payments Of Dividends PaymentsOfDividends	365572000	USD
CY2012	avb	Repayments Of Secured Debt Conventional And Tax Exempt RepaymentsOfSecuredDebtConventionalAndTaxExempt	110013000	USD
CY2012	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	15664000	USD
CY2012	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	29000	USD
CY2012	us-gaap	Payments For Proceeds From Real Estate Partnership Investment Net PaymentsForProceedsFromRealEstatePartnershipInvestmentNet	299000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	2116765000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	119268000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Gain On Sale Of Communities ReconciliationOfIncomeFromBookBasisToTaxBasisGainOnSaleOfCommunities	-37575000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortization	15012000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Impairment Loss ReconciliationOfIncomeFromBookBasisToTaxBasisImpairmentLoss	1449000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Other Adjustments ReconciliationOfIncomeFromBookBasisToTaxBasisOtherAdjustments	-3202000	USD
CY2012	avb	Reconciliation Of Income From Book Basis To Tax Basis Net Income Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisNetIncomeLossTaxBasis	455485000	USD
CY2012	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.47	pure
CY2012	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.33	pure
CY2012	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.20	pure
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	1889000	USD
CY2012	avb	Casualty And Impairment Loss CasualtyAndImpairmentLoss	1449000	USD
CY2011	avb	Casualty And Impairment Loss CasualtyAndImpairmentLoss	14052000	USD
CY2012	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-3573000	USD
CY2012	avb	Gain Loss On Acquisition Of Unconsolidated Real Estate Entity GainLossOnAcquisitionOfUnconsolidatedRealEstateEntity	14194000	USD
CY2012	avb	Long Term Purchase Commitment Obligation Satisfied By Purchasing Remaining Parcels Of Land LongTermPurchaseCommitmentObligationSatisfiedByPurchasingRemainingParcelsOfLand	27709000	USD
CY2011	avb	Disposal Group Including Discontinued Operation Gain Loss On Extinguishment Of Debt DisposalGroupIncludingDiscontinuedOperationGainLossOnExtinguishmentOfDebt	-3880000	USD
CY2012	avb	Number Of Land Parcels Acquired NumberOfLandParcelsAcquired	4	property
CY2012	avb	Number Of Parcels Of Land To Be Developed NumberOfParcelsOfLandToBeDeveloped	3	property
CY2012	avb	Number Of Land Parcels Impaired NumberOfLandParcelsImpaired	2	property
CY2011	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	12097000	USD
CY2008	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	9952000	USD
CY2012	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	1889000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	3854068000	USD
CY2012Q4	avb	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements Net RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet	8015120000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Accumulated Depreciation RealEstateAndAccumulatedDepreciationAccumulatedDepreciation	2056222000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements	10071342000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	8302850000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	1768492000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	1497480000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	6805370000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	1768492000	USD
CY2012	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	6260	shares
CY2012Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2012Q4	avb	Casualty And Impairment Loss CasualtyAndImpairmentLoss	1449000	USD
CY2012	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	9593000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	50224000	USD

Files In Submission

Name	View Source	Status
0001047469-13-001516-index-headers.html	Edgar Link	pending
0001047469-13-001516-index.html	Edgar Link	pending
0001047469-13-001516.txt	Edgar Link	pending
0001047469-13-001516-xbrl.zip	Edgar Link	pending
a2213127z10-k.htm	Edgar Link	pending
a2213127zex-10_23.htm	Edgar Link	pending
a2213127zex-10_24.htm	Edgar Link	pending
a2213127zex-10_25.htm	Edgar Link	pending
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a2213127zex-10_27.htm	Edgar Link	pending
a2213127zex-10_29.htm	Edgar Link	pending
a2213127zex-10_30.htm	Edgar Link	pending
a2213127zex-12_1.htm	Edgar Link	pending
a2213127zex-21_1.htm	Edgar Link	pending
a2213127zex-23_1.htm	Edgar Link	pending
a2213127zex-31_1.htm	Edgar Link	pending
a2213127zex-31_2.htm	Edgar Link	pending
a2213127zex-32.htm	Edgar Link	pending
avb-20121231.xml	Edgar Link	completed
avb-20121231.xsd	Edgar Link	pending
avb-20121231_cal.xml	Edgar Link	unprocessable
avb-20121231_def.xml	Edgar Link	unprocessable
avb-20121231_lab.xml	Edgar Link	unprocessable
avb-20121231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$AVB
AVALONBAY COMMUNITIES INC Stock $avb

2011 Q4 Form 10-K Financial Statement

#000104746913001516 Filed on February 22, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVB AVALONBAY COMMUNITIES INC Stock $avb

2011 Q4 Form 10-K Financial Statement

#000104746913001516 Filed on February 22, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVB
AVALONBAY COMMUNITIES INC Stock $avb