$MAA
MID AMERICA APARTMENT COMMUNITIES INC. Stock $maa

$maa Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000095017022001423 Filed on February 17, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$463.6M	$1.778B	$423.7M
YoY Change	9.41%	5.97%	1.66%
Cost Of Revenue	$182.3M	$726.9M	$173.3M
YoY Change	5.2%	4.92%	5.93%
Gross Profit	$281.3M	$1.051B	$250.4M
YoY Change	12.33%	6.7%	-1.11%
Gross Profit Margin	60.67%	59.12%	59.1%
Selling, General & Admin	$14.12M	$52.88M	$11.70M
YoY Change	20.69%	12.76%	7.34%
% of Gross Profit	5.02%	5.03%	4.67%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$135.7M	$534.4M	$129.8M
YoY Change	4.57%	4.44%	3.34%
% of Gross Profit	48.26%	50.84%	51.84%
Operating Expenses	$149.6M	$586.3M	$141.2M
YoY Change	5.96%	5.13%	3.6%
Operating Profit	$131.7M	$464.9M	$109.2M
YoY Change	20.56%	8.74%	-6.59%
Interest Expense	-$28.52M	$156.9M	-$23.10M
YoY Change	23.45%	-6.37%	-49.12%
% of Operating Profit	-21.66%	33.75%	-21.15%
Other Income/Expense, Net	$7.212M	$33.90M	$400.0K
YoY Change	1703.0%	598.0%	-66.67%
Pretax Income	$198.4M	$563.1M	$86.70M
YoY Change	128.85%	111.83%	-44.24%
Income Tax	$7.790M	$13.64M	$800.0K
% Of Pretax Income	3.93%	2.42%	0.92%
Net Earnings	$185.6M	$533.8M	$83.30M
YoY Change	122.86%	109.36%	-44.32%
Net Earnings / Revenue	40.05%	30.02%	19.66%
Basic Earnings Per Share		$4.62
Diluted Earnings Per Share	$1.607M	$4.61	$727.5K
COMMON SHARES
Basic Shares Outstanding	115.1M	114.7M
Diluted Shares Outstanding		115.0M

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$54.30M	$54.30M	$25.00M
YoY Change	117.21%	117.21%	25.0%
Cash & Equivalents	$54.30M	$54.30M	$25.20M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory	$24.02M	$24.02M	$61.00M
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$78.32M	$78.32M	$86.00M
YoY Change	-8.93%	-8.93%	56.36%
LONG-TERM ASSETS
Property, Plant & Equipment	$10.88B	$10.88B	$10.91B
YoY Change	-0.3%	-0.3%	-0.47%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$122.2M	$122.2M	$66.00M
YoY Change	85.19%	85.19%	50.0%
Other Assets	$76.30M	$76.30M	$10.00M
YoY Change	662.96%	662.96%	-80.0%
Total Long-Term Assets	$11.21B	$11.21B	$11.11B
YoY Change	0.88%	0.88%	-0.6%
TOTAL ASSETS
Total Short-Term Assets	$78.32M	$78.32M	$86.00M
Total Long-Term Assets	$11.21B	$11.21B	$11.11B
Total Assets	$11.29B	$11.29B	$11.19B
YoY Change	0.81%	0.81%	-0.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$584.4M	$584.4M	$528.0M
YoY Change	10.68%	10.68%	11.86%
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	$584.4M	$584.4M	$528.0M
YoY Change	10.68%	10.68%	11.86%
LONG-TERM LIABILITIES
Long-Term Debt	$4.517B	$4.517B	$4.563B
YoY Change	-1.01%	-1.01%	2.42%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$4.517B	$4.517B	$4.563B
YoY Change	-1.01%	-1.01%	2.42%
TOTAL LIABILITIES
Total Short-Term Liabilities	$584.4M	$584.4M	$528.0M
Total Long-Term Liabilities	$4.517B	$4.517B	$4.563B
Total Liabilities	$5.101B	$5.290B	$5.091B
YoY Change	0.2%	-0.34%	3.33%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$5.965B	$5.995B	$5.872B
YoY Change
Total Liabilities & Shareholders Equity	$11.29B	$11.29B	$11.19B
YoY Change	0.81%	0.81%	-0.32%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$185.6M	$533.8M	$83.30M
YoY Change	122.86%	109.36%	-44.32%
Depreciation, Depletion And Amortization	$135.7M	$534.4M	$129.8M
YoY Change	4.57%	4.44%	3.34%
Cash From Operating Activities	$216.7M	$895.0M	$180.0M
YoY Change	20.4%	8.62%	12.57%
INVESTING ACTIVITIES
Capital Expenditures	-$122.9M	-$557.3M	-$190.7M
YoY Change	-35.55%	15.17%	15.09%
Acquisitions
YoY Change
Other Investing Activities	$139.0M	$303.7M	-$800.0K
YoY Change	-17471.62%	-38064.88%	-100.51%
Cash From Investing Activities	$16.07M	-$253.6M	-$191.5M
YoY Change	-108.39%	-47.69%	2419.74%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-143.7M	-546.4M	19.60M
YoY Change	-833.21%	46.04%	-115.74%
NET CHANGE
Cash From Operating Activities	216.7M	895.0M	180.0M
Cash From Investing Activities	16.07M	-253.6M	-191.5M
Cash From Financing Activities	-143.7M	-546.4M	19.60M
Net Change In Cash	89.08M	94.98M	8.100M
YoY Change	999.72%	-371.95%	-70.86%
FREE CASH FLOW
Cash From Operating Activities	$216.7M	$895.0M	$180.0M
Capital Expenditures	-$122.9M	-$557.3M	-$190.7M
Free Cash Flow	$339.6M	$1.452B	$370.7M
YoY Change	-8.38%	11.04%	13.85%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccruedLiabilitiesCurrentAndNoncurrent
CY2021Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccruedLiabilitiesCurrentAndNoncurrent
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherAssets
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherAssets
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000912595
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-12762
CY2021	dei	Entity Registrant Name EntityRegistrantName	MID-AMERICA APARTMENT COMMUNITIES, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	TN
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-1543819
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	6815 Poplar Avenue
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 500
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Germantown
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	38138
CY2021	dei	City Area Code CityAreaCode	901
CY2021	dei	Local Phone Number LocalPhoneNumber	682-6600
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	13800000000
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	115341027
CY2021	dei	Auditor Firm AuditorFirmId	42
CY2021	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2021	dei	Auditor Location AuditorLocation	Memphis, Tennessee
CY2021Q4	us-gaap	Land Land	1977813000
CY2020Q4	us-gaap	Land Land	1929181000
CY2021Q4	maa	Buildings Improvements And Other BuildingsImprovementsAndOther	12454439000
CY2020Q4	maa	Buildings Improvements And Other BuildingsImprovementsAndOther	12065244000
CY2021Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	247970000
CY2020Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	283477000
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	14680222000
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	14277902000
CY2021Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	3848161000
CY2020Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	3415105000
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	10832061000
CY2020Q4	us-gaap	Liabilities Liabilities	5090986000
CY2021Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	30185000
CY2020Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	15397000
CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	10862797000
CY2021Q4	maa	Undeveloped Land UndevelopedLand	24015000
CY2020Q4	maa	Undeveloped Land UndevelopedLand	60993000
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	42827000
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	43325000
CY2021Q4	maa	Real Estate Assets Net RealEstateAssetsNet	10898903000
CY2020Q4	maa	Real Estate Assets Net RealEstateAssetsNet	10967115000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	54302000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	25198000
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	76296000
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	10417000
CY2021Q4	us-gaap	Other Assets OtherAssets	255681000
CY2020Q4	us-gaap	Other Assets OtherAssets	192061000
CY2021Q4	us-gaap	Assets Assets	11285182000
CY2020Q4	us-gaap	Assets Assets	11194791000
CY2021Q4	us-gaap	Unsecured Debt UnsecuredDebt	4151375000
CY2020Q4	us-gaap	Unsecured Debt UnsecuredDebt	4077373000
CY2021Q4	us-gaap	Secured Debt SecuredDebt	365315000
CY2020Q4	us-gaap	Secured Debt SecuredDebt	485339000
CY2021Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	584400000
CY2020Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	528274000
CY2021Q4	us-gaap	Liabilities Liabilities	5101090000
CY2021	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0850
CY2020	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0850
CY2021Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	50.00
CY2020Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	50.00
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	867846
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	867846
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	867846
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	867846
CY2021Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	9000
CY2020Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	9000
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	145000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	145000000
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	115336876
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	115336876
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	114373727
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	114373727
CY2021Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	1151000
CY2020Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	1141000
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	7230956000
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	7176793000
CY2021Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	1255807000
CY2020Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	1294182000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11132000
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12128000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	5965177000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	5871633000
CY2021Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	165116000
CY2020Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	206927000
CY2021Q4	maa	Parent Lp Stockholders Equity Including Portion Attributable To Noncontrolling Interest ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6130293000
CY2020Q4	maa	Parent Lp Stockholders Equity Including Portion Attributable To Noncontrolling Interest ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6078560000
CY2021Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	23614000
CY2020Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	9848000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6153907000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6088408000
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11285182000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11194791000
CY2021Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	131559
CY2020Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	121534
CY2021	us-gaap	Revenues Revenues	1778082000
CY2020	us-gaap	Revenues Revenues	1677984000
CY2019	us-gaap	Revenues Revenues	1641017000
CY2021	maa	Operating Costs And Expenses Excluding Depreciation And Amortization OperatingCostsAndExpensesExcludingDepreciationAndAmortization	404288000
CY2020	maa	Operating Costs And Expenses Excluding Depreciation And Amortization OperatingCostsAndExpensesExcludingDepreciationAndAmortization	387966000
CY2019	maa	Operating Costs And Expenses Excluding Depreciation And Amortization OperatingCostsAndExpensesExcludingDepreciationAndAmortization	377453000
CY2021	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	266877000
CY2020	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	252505000
CY2019	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	235392000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	533433000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	510842000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	496843000
CY2021	maa	Property Operating Expenses PropertyOperatingExpenses	1204598000
CY2020	maa	Property Operating Expenses PropertyOperatingExpenses	1151313000
CY2019	maa	Property Operating Expenses PropertyOperatingExpenses	1109688000
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CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	52300000
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CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	52884000
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CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	43845000
CY2021	us-gaap	Interest Expense InterestExpense	156881000
CY2020	us-gaap	Interest Expense InterestExpense	167562000
CY2019	us-gaap	Interest Expense InterestExpense	179847000
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	220428000
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	9000
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	80988000
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CY2020	maa	Gain Loss On Sale Of Non Depreciable Real Estate Assets GainLossOnSaleOfNonDepreciableRealEstateAssets	1024000
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CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	265841000
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CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13637000
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3696000
CY2021	maa	Income Loss From Continuing Operations Before Equity Method Investments IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments	549491000
CY2020	maa	Income Loss From Continuing Operations Before Equity Method Investments IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments	262514000
CY2019	maa	Income Loss From Continuing Operations Before Equity Method Investments IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments	364964000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1211000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1501000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1654000
CY2021	us-gaap	Profit Loss ProfitLoss	550702000
CY2020	us-gaap	Profit Loss ProfitLoss	264015000
CY2019	us-gaap	Profit Loss ProfitLoss	366618000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16911000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9053000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12807000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	533791000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	254962000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	353811000
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	530103000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	251274000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	350123000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.62
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.20
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.07
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.61
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.19
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.07
CY2021	us-gaap	Profit Loss ProfitLoss	550702000
CY2020	us-gaap	Profit Loss ProfitLoss	264015000
CY2019	us-gaap	Profit Loss ProfitLoss	366618000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-11676000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1114000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1088000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1747000
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	551816000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	265103000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	353195000
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	17029000
CY2019	maa	Acquisition Of Noncontrolling Interests AcquisitionOfNoncontrollingInterests	10880000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6289459000
CY2020	us-gaap	Profit Loss ProfitLoss	264015000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1088000
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-208000
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5657000
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	71000
CY2020	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	363000
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	9091000
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	12350000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	534787000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	256012000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	340845000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6372189000
CY2019	us-gaap	Profit Loss ProfitLoss	366618000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-13423000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	20500000
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3724000
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2881000
CY2019	maa	Stock Issued In Exchange For Redeemable Stock StockIssuedInExchangeForRedeemableStock	575000
CY2019	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	-3641000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	14684000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.8800
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	442698000
CY2019	maa	Non Controlling Interests Dividents Per Share Declared NonControllingInterestsDividentsPerShareDeclared	3.8800
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16060000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16038000
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	4.0250
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	460340000
CY2020	maa	Non Controlling Interests Dividents Per Share Declared NonControllingInterestsDividentsPerShareDeclared	4.0250
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16334000
CY2020	maa	Contributions From Non Controlling Interest ContributionsFromNonControllingInterest	3601000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6088408000
CY2021	us-gaap	Profit Loss ProfitLoss	550702000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1114000
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-429000
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	9043000
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1478000
CY2021	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	-13131000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	18152000
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	4.1625
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	478597000
CY2021	maa	Non Controlling Interests Dividents Per Share Declared NonControllingInterestsDividentsPerShareDeclared	4.1625
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	14825000
CY2021	maa	Contributions From Non Controlling Interest ContributionsFromNonControllingInterest	13766000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6153907000
CY2021	us-gaap	Profit Loss ProfitLoss	550702000
CY2020	us-gaap	Profit Loss ProfitLoss	264015000
CY2019	us-gaap	Profit Loss ProfitLoss	366618000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	534415000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	511678000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	497790000
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	220428000
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9000
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	80988000
CY2021	maa	Gainon Saleof Non Depreciable Assets GainonSaleofNonDepreciableAssets	811000
CY2020	maa	Gainon Saleof Non Depreciable Assets GainonSaleofNonDepreciableAssets	1024000
CY2019	maa	Gainon Saleof Non Depreciable Assets GainonSaleofNonDepreciableAssets	12047000
CY2021	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-4560000
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	2562000
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	17886000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16665000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	14329000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	13654000
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	5652000
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4960000
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	5778000
CY2021	maa	Gain From Unconsolidated Limited Partnerships Net Of Distributions Received GainFromUnconsolidatedLimitedPartnershipsNetOfDistributionsReceived	51713000
CY2020	maa	Gain From Unconsolidated Limited Partnerships Net Of Distributions Received GainFromUnconsolidatedLimitedPartnershipsNetOfDistributionsReceived	4577000
CY2019	maa	Gain From Unconsolidated Limited Partnerships Net Of Distributions Received GainFromUnconsolidatedLimitedPartnershipsNetOfDistributionsReceived	3882000
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	55925000
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	37139000
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	12383000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	894967000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	823949000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	781420000
CY2021	maa	Payments To Acquire Real Estate And Other Assets PaymentsToAcquireRealEstateAndOtherAssets	46028000
CY2020	maa	Payments To Acquire Real Estate And Other Assets PaymentsToAcquireRealEstateAndOtherAssets	56965000
CY2019	maa	Payments To Acquire Real Estate And Other Assets PaymentsToAcquireRealEstateAndOtherAssets	105106000
CY2021	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	279635000
CY2020	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	225506000
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	190204000
CY2021	us-gaap	Payments To Acquire In Process Research And Development PaymentsToAcquireInProcessResearchAndDevelopment	231642000
CY2020	us-gaap	Payments To Acquire In Process Research And Development PaymentsToAcquireInProcessResearchAndDevelopment	201435000
CY2019	us-gaap	Payments To Acquire In Process Research And Development PaymentsToAcquireInProcessResearchAndDevelopment	112893000
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	497000
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	349000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	507000
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	4669000
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	5349000
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	5391000
CY2021	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	307891000
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	4175000
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	174814000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-253586000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-484731000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-238273000
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	255000000
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	565000000
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	255000000
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1105000000
CY2021	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-172000000
CY2020	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	102000000
CY2019	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	70000000
CY2021	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	594423000
CY2020	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	447593000
CY2019	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1059289000
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	467153000
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	441108000
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	657619000
CY2021	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5940000
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4217000
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	14274000
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	15497000
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	16243000
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	15939000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	470401000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	457355000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	437743000
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3688000
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3688000
CY2019	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3688000
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6142000
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1126000
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	15695000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-546398000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-374144000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-524279000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	94983000
CY2019	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	9298000
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	9720000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-34926000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	18868000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35615000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70541000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	51673000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130598000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35615000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70541000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	54302000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	25198000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	20476000
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	76296000
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	10417000
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	50065000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130598000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35615000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70541000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	158630000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	165098000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	169743000
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	2543000
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	2549000
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	2546000
CY2021	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	43292000
CY2020	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	502000
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	2366000
CY2021	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	15123000
CY2020	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	19625000
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	6912000
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2889000
CY2018Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	6372170000
CY2019	us-gaap	Profit Loss ProfitLoss	366618000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-13423000
CY2019	maa	Units Issued During Period Value New Issues UnitsIssuedDuringPeriodValueNewIssues	20500000
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3724000
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2881000
CY2019	maa	Stock Issued In Exchange For Redeemable Stock StockIssuedInExchangeForRedeemableStock	575000
CY2019	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	-3641000
CY2019	maa	Amortization Unearned Compensation AmortizationUnearnedCompensation	14684000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2019	maa	Distributions Distributions	458758000
CY2019	maa	Acquisition Of Noncontrolling Interests AcquisitionOfNoncontrollingInterests	10880000
CY2019	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	6126000
CY2019Q4	us-gaap	Partners Capital PartnersCapital	6289440000
CY2021Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	290
CY2021Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	16
CY2020	us-gaap	Profit Loss ProfitLoss	264015000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1088000
CY2020	maa	Units Issued During Period Value New Issues UnitsIssuedDuringPeriodValueNewIssues	-208000
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5657000
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	71000
CY2020	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	363000
CY2020	maa	Amortization Unearned Compensation AmortizationUnearnedCompensation	16038000
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2020	maa	Distributions Distributions	476674000
CY2020	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	3601000
CY2020Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	6088389000
CY2021	us-gaap	Profit Loss ProfitLoss	550702000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1114000
CY2021	maa	Units Issued During Period Value New Issues UnitsIssuedDuringPeriodValueNewIssues	-429000
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	9043000
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1478000
CY2021	maa	Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement	-13131000
CY2021	maa	Amortization Unearned Compensation AmortizationUnearnedCompensation	18152000
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3688000
CY2021	maa	Distributions Distributions	493422000
CY2021	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	13766000
CY2021Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	6153888000
CY2021Q4	us-gaap	Real Estate Investments Joint Ventures RealEstateInvestmentsJointVentures	16000000.0
CY2021Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	584400000
CY2020Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	528274000
CY2021	maa	Percentage Of Rental Revenue And Other Income From Leasing Of Apartment Homes PercentageOfRentalRevenueAndOtherIncomeFromLeasingOfApartmentHomes	0.93
CY2021	maa	Percentage Of Reimbursable Revenue From Leasing Of Apartment Homes PercentageOfReimbursableRevenueFromLeasingOfApartmentHomes	0.06
CY2021	maa	Percentageof Rental Revenueand Other Income From Nonleasing Activities PercentageofRentalRevenueandOtherIncomeFromNonleasingActivities	0.01
CY2021	us-gaap	Advertising Expense AdvertisingExpense	23900000
CY2020	us-gaap	Advertising Expense AdvertisingExpense	23900000
CY2019	us-gaap	Advertising Expense AdvertisingExpense	20800000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	47000000.0
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	49400000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	30300000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	31700000
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-indent:0.0%;font-size:10.0pt;margin-top:8.0pt;line-height:1.15;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:Times New Roman;">Use of Estimates</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:0.0pt;line-height:1.15;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:Times New Roman;">Management has made a number of estimates and assumptions relating to the reporting of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses to prepare these financial statements and notes in conformity with GAAP. Actual results could differ from those estimates.</span><span style="white-space:pre-wrap;font-size:10.0pt;font-family:Times New Roman;"> </span></p>
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	550702000
CY2020	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	264015000
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	366618000
CY2021	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	16911000
CY2020	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	9053000
CY2019	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	12807000
CY2021	maa	Income Loss From Continuing Operations Allocated To Unvested Restricted Shares IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares	539000
CY2020	maa	Income Loss From Continuing Operations Allocated To Unvested Restricted Shares IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares	338000
CY2019	maa	Income Loss From Continuing Operations Allocated To Unvested Restricted Shares IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares	519000
CY2021	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2020	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2019	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2021	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Basic AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic	529564000
CY2020	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Basic AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic	250936000
CY2019	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Basic AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic	349604000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114717000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114188000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	113854000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.62
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.20
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.07
CY2021	maa	Incomefrom Continuing Operations Including Portion Attributableto Noncontrolling Interest IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest	550702000
CY2020	maa	Incomefrom Continuing Operations Including Portion Attributableto Noncontrolling Interest IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest	264015000
CY2019	maa	Incomefrom Continuing Operations Including Portion Attributableto Noncontrolling Interest IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest	366618000
CY2021	maa	Incomefrom Continuing Operations Attributableto Noncontrolling Interest IncomefromContinuingOperationsAttributabletoNoncontrollingInterest	-16911000
CY2020	maa	Incomefrom Continuing Operations Attributableto Noncontrolling Interest IncomefromContinuingOperationsAttributabletoNoncontrollingInterest	-9053000
CY2019	maa	Incomefrom Continuing Operations Attributableto Noncontrolling Interest IncomefromContinuingOperationsAttributabletoNoncontrollingInterest	-12807000
CY2021	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2020	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2019	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3688000
CY2021	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Diluted AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted	530103000
CY2020	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Diluted AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted	251274000
CY2019	maa	Adjusted Income Loss From Continuing Operations Available For Common Shareholders Diluted AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted	350123000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114717000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114188000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	113854000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	322
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	312
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	259
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	115039000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	114500000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	114113000
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.61
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.19
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.07
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	18200000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16000000.0
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14700000
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1500000
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1700000
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1000000.0
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	14000000.0
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P0Y9M18D
CY2021	us-gaap	Employee Service Share Based Compensation Cash Flow Effect Cash Used To Settle Awards EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards	9000000.0
CY2020	us-gaap	Employee Service Share Based Compensation Cash Flow Effect Cash Used To Settle Awards EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards	5700000
CY2019	us-gaap	Employee Service Share Based Compensation Cash Flow Effect Cash Used To Settle Awards EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards	3700000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	15800000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	13900000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	9300000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	19845
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	77.83
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	19032
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	77.67
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	813
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	81.41
CY2021Q4	us-gaap	Notes Payable NotesPayable	4516690000
CY2020Q4	us-gaap	Notes Payable NotesPayable	4562712000
CY2021Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.034
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	124827000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	348834000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	398024000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	402424000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	296430000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2946151000
CY2021Q4	us-gaap	Notes Payable NotesPayable	4516690000
CY2021	us-gaap	Preferred Stock Redemption Date PreferredStockRedemptionDate	2026-10-01
CY2021Q4	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	50.00
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	51800000
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	5800000
CY2019	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4200000
CY2021	maa	Income Tax Expense IncomeTaxExpense	10900000
CY2020	maa	Income Tax Expense IncomeTaxExpense	800000
CY2019	maa	Income Tax Expense IncomeTaxExpense	1000000.0
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13600000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3300000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3700000
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	328000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	308000
CY2021Q4	maa	Unrealized Gain From Limited Partnerships UnrealizedGainFromLimitedPartnerships	12946000
CY2020Q4	maa	Unrealized Gain From Limited Partnerships UnrealizedGainFromLimitedPartnerships	2087000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	246000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	275000
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	13192000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2362000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	12864000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2054000
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2021Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	54400000
CY2021	maa	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	2.43
CY2021	maa	Ordinary Income Dividends Per Share Percentage OrdinaryIncomeDividendsPerSharePercentage	0.5918
CY2020	maa	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	4.00
CY2020	maa	Ordinary Income Dividends Per Share Percentage OrdinaryIncomeDividendsPerSharePercentage	0.9998
CY2019	maa	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	3.51
CY2019	maa	Ordinary Income Dividends Per Share Percentage OrdinaryIncomeDividendsPerSharePercentage	0.9139
CY2021	maa	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	1.36
CY2021	maa	Returnof Capital Dividends Per Share Percentage ReturnofCapitalDividendsPerSharePercentage	0.3315
CY2020	maa	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.00
CY2020	maa	Returnof Capital Dividends Per Share Percentage ReturnofCapitalDividendsPerSharePercentage	0.0002
CY2019	maa	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.21
CY2019	maa	Returnof Capital Dividends Per Share Percentage ReturnofCapitalDividendsPerSharePercentage	0.0554
CY2021	maa	Unrecaptured Section1250 Gain Dividends Per Share UnrecapturedSection1250GainDividendsPerShare	0.31
CY2021	maa	Unrecaptured Section1250 Gain Dividends Per Share Percentage UnrecapturedSection1250GainDividendsPerSharePercentage	0.0767
CY2020	maa	Unrecaptured Section1250 Gain Dividends Per Share UnrecapturedSection1250GainDividendsPerShare	0.00
CY2020	maa	Unrecaptured Section1250 Gain Dividends Per Share Percentage UnrecapturedSection1250GainDividendsPerSharePercentage	0.0000
CY2019	maa	Unrecaptured Section1250 Gain Dividends Per Share UnrecapturedSection1250GainDividendsPerShare	0.12
CY2019	maa	Unrecaptured Section1250 Gain Dividends Per Share Percentage UnrecapturedSection1250GainDividendsPerSharePercentage	0.0307
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	4.10
CY2021	maa	Common Stock Dividends Per Share Cash Paid Percentage CommonStockDividendsPerShareCashPaidPercentage	1
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	4.00
CY2020	maa	Common Stock Dividends Per Share Cash Paid Percentage CommonStockDividendsPerShareCashPaidPercentage	1
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	3.84
CY2019	maa	Common Stock Dividends Per Share Cash Paid Percentage CommonStockDividendsPerShareCashPaidPercentage	1
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	115336876
CY2021Q4	maa	Common Shares And Operating Partnership Units Outstanding CommonSharesAndOperatingPartnershipUnitsOutstanding	118542994
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	114373727
CY2020Q4	maa	Common Shares And Operating Partnership Units Outstanding CommonSharesAndOperatingPartnershipUnitsOutstanding	118431384
CY2021Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	50.00
CY2021	us-gaap	Preferred Stock Redemption Date PreferredStockRedemptionDate	2026-10-01
CY2021Q4	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	50.00
CY2021	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0850
CY2021	us-gaap	Preferred Stock Dividend Rate Per Dollar Amount PreferredStockDividendRatePerDollarAmount	4.25
CY2021Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	43400000
CY2021Q4	maa	Operating Partnership Units Outstanding OperatingPartnershipUnitsOutstanding	118542994
CY2021Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	290
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2021Q4	us-gaap	General Partners Capital Account Units Outstanding GeneralPartnersCapitalAccountUnitsOutstanding	115336876
CY2021Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	3206118
CY2020Q4	maa	Operating Partnership Units Outstanding OperatingPartnershipUnitsOutstanding	118431384
CY2020Q4	us-gaap	General Partners Capital Account Units Outstanding GeneralPartnersCapitalAccountUnitsOutstanding	114373727
CY2020Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	4057657
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4100000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3900000
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3500000
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	122582
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	28100000
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P32Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	2894000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2885000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2862000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2872000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2920000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	59993000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	74426000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	44175000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	30251000
CY2021Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	5200000
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	5300000
CY2021	maa	Period Properties Owned And Stabilized PeriodPropertiesOwnedAndStabilized	P12M
CY2021Q4	maa	Occupancy Level For Stabilized Communities OccupancyLevelForStabilizedCommunities	0.90
CY2021	maa	Period Properties Stabilized PeriodPropertiesStabilized	P90D
CY2021	us-gaap	Revenues Revenues	1778082000
CY2020	us-gaap	Revenues Revenues	1677984000
CY2019	us-gaap	Revenues Revenues	1641017000
CY2021	maa	Operating Income Before Depreciation OperatingIncomeBeforeDepreciation	1106917000
CY2020	maa	Operating Income Before Depreciation OperatingIncomeBeforeDepreciation	1037513000
CY2019	maa	Operating Income Before Depreciation OperatingIncomeBeforeDepreciation	1028172000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	533433000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	510842000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	496843000
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	55732000
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	52300000
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	55011000
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	52884000
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	46858000
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	43845000
CY2021	us-gaap	Interest Expense InterestExpense	156881000
CY2020	us-gaap	Interest Expense InterestExpense	167562000
CY2019	us-gaap	Interest Expense InterestExpense	179847000
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	220428000
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	9000
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	80988000
CY2021	maa	Gain Loss On Sale Of Non Depreciable Real Estate Assets GainLossOnSaleOfNonDepreciableRealEstateAssets	811000
CY2020	maa	Gain Loss On Sale Of Non Depreciable Real Estate Assets GainLossOnSaleOfNonDepreciableRealEstateAssets	1024000
CY2019	maa	Gain Loss On Sale Of Non Depreciable Real Estate Assets GainLossOnSaleOfNonDepreciableRealEstateAssets	12047000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	33902000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4857000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	22999000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13637000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3327000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3696000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1211000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1501000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1654000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16911000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9053000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12807000
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3688000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	530103000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	251274000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	350123000
CY2021Q4	us-gaap	Assets Assets	11285182000
CY2020Q4	us-gaap	Assets Assets	11194791000
CY2021	maa	Real Estate Geographic Location Of Property1 RealEstateGeographicLocationOfProperty1	Total Real Estate Assets, net of Real Estate Joint Venture
CY2021Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	5262000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	2001828000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	10060580000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	2001828000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	12702409000
CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14704237000
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3848161000
CY2021Q4	maa	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements Net RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet	10856076000
CY2021Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	11800000000
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14338895000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	13898707000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	13656807000
CY2021	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	44086000
CY2020	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	56327000
CY2019	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	105730000
CY2019Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	512000
CY2021	maa	Real Estate Improvements And Developments RealEstateImprovementsAndDevelopments	506775000
CY2020	maa	Real Estate Improvements And Developments RealEstateImprovementsAndDevelopments	437268000
CY2019	maa	Real Estate Improvements And Developments RealEstateImprovementsAndDevelopments	302380000
CY2021	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	185519000
CY2020	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	53407000
CY2019	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	165698000
CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14704237000
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14338895000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	13898707000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3415105000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	2955253000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	2549287000
CY2021	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	531848000
CY2020	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	508746000
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	493674000
CY2021	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	98792000
CY2020	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	48894000
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	87708000
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3848161000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3415105000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	2955253000

Files In Submission

Name	View Source	Status
0000950170-22-001423-index-headers.html	Edgar Link	pending
0000950170-22-001423-index.html	Edgar Link	pending
0000950170-22-001423.txt	Edgar Link	pending
0000950170-22-001423-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
img241711932_0.jpg	Edgar Link	pending
maa-20211231.htm	Edgar Link	pending
maa-20211231.xsd	Edgar Link	pending
maa-20211231_cal.xml	Edgar Link	unprocessable
maa-20211231_def.xml	Edgar Link	unprocessable
maa-20211231_htm.xml	Edgar Link	completed
maa-20211231_lab.xml	Edgar Link	unprocessable
maa-20211231_pre.xml	Edgar Link	unprocessable
maa-ex21_1.htm	Edgar Link	pending
maa-ex23_1.htm	Edgar Link	pending
maa-ex23_2.htm	Edgar Link	pending
maa-ex31_1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$MAA
MID AMERICA APARTMENT COMMUNITIES INC. Stock $maa

2021 Q4 Form 10-K Financial Statement

#000095017022001423 Filed on February 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MAA MID AMERICA APARTMENT COMMUNITIES INC. Stock $maa

2021 Q4 Form 10-K Financial Statement

#000095017022001423 Filed on February 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MAA
MID AMERICA APARTMENT COMMUNITIES INC. Stock $maa