Entity Central Index Key Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing, equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. Also includes amount of investment in certain other real estate investments not specifically identified elsewhere in the existing taxonomy. Undeveloped land. Real Estate Assets, Net Operating costs and expenses excluding depreciation and amortization. Property operating expenses. Gain (loss) on sale of non depreciable real estate assets. Income (Loss) from Continuing Operations before Equity Method Investments preferred unit dividend, income statement Gain on sale of non-depreciable assets. The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures, and other related assets such as intangibles (in-place-leases) on it and so forth; includes real estate and other assets intended to generate income for the owner; excludes real estate acquired for use by the owner. Income (loss) from continuing operations allocated to unvested restricted shares. Income from continuing operations allocated to unvested restricted shares Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income from Continuing Operations Attributable to Noncontrolling Interest Represents total operating revenues less property operating expenses, excluding depreciation. Cover [Abstract] Document Information [Table] Document Information [Table] Partner Type Partner Type Of Partners Capital Account [Axis] Partner Type of Partners' Capital Account, Name Partner Type Of Partners Capital Account Name [Domain] Limited Partner [Member] Limited Partner [Member] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Common Stock [Member] Common Stock [Member] Cumulative Preferred Stock [Member] Cumulative Preferred Stock [Member] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Security Exchange Name Security Exchange Name Trading Symbol Trading Symbol Title of 12(b) Security Security12b Title Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Shell Company Entity Shell Company Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, Address Line Two Entity Address Address Line2 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Parent LP stockholders equity including portion attributable to noncontrolling interest Liabilities and Capital Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Land Land Buildings and improvements and other Buildings Improvements And Other Development and capital improvements in progress Construction In Progress Gross Real Estate Investment Property, at Cost Real Estate Investment Property At Cost Less: Accumulated depreciation Real Estate Investment Property Accumulated Depreciation Real Estate Investment Property, Net Real Estate Investment Property Net Undeveloped land Undeveloped Land Investment in real estate joint venture Investments In Affiliates Subsidiaries Associates And Joint Ventures Real estate assets, net Real Estate Assets Net Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash Restricted Cash Other assets Other Assets Total assets Assets Liabilities and equity Liabilities And Stockholders Equity [Abstract] Liabilities: Liabilities [Abstract] Unsecured notes payable Unsecured Debt Secured notes payable Secured Debt Accrued expenses and other liabilities Accrued Liabilities Current And Noncurrent Total liabilities Liabilities Redeemable common stock Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests Shareholders’ equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Preferred Stock, Value, Outstanding Preferred Stock Value Outstanding Common stock Common Stock Value Outstanding Additional paid-in capital Additional Paid In Capital Accumulated distributions in excess of net income Accumulated Distributions In Excess Of Net Income Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Total MAA shareholders’ equity Stockholders Equity Noncontrolling interests - Operating Partnership units Minority Interest In Operating Partnerships Total Company’s shareholders’ equity Parent L P Stockholders Equity Including Portion Attributable To Noncontrolling Interest Noncontrolling interests - consolidated real estate entities Minority Interest In Joint Ventures Total equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and equity Liabilities And Stockholders Equity Common stock, par value per share Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Preferred Stock, Par or Stated Value Per Share Preferred Stock Par Or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock Shares Authorized Preferred Stock, Dividend Rate, Percentage Preferred Stock Dividend Rate Percentage Preferred Stock, Shares Issued Preferred Stock Shares Issued Preferred Stock, Shares Outstanding Preferred Stock Shares Outstanding Preferred Stock, Liquidation Preference Per Share Preferred Stock Liquidation Preference Redeemable stock, shares issued and outstanding Temporary Equity Shares Outstanding General Partners' Capital Account, Units Outstanding General Partners Capital Account Units Outstanding Limited Partners' Capital Account, Units Outstanding Limited Partners Capital Account Units Outstanding Income Statement [Abstract] Revenues: Revenues [Abstract] Rental and other property revenues Revenues Expenses: Operating Costs And Expenses [Abstract] Operating expenses, excluding real estate taxes and insurance Operating Costs And Expenses Excluding Depreciation And Amortization Real estate taxes and insurance Real Estate Taxes And Insurance Depreciation and amortization Depreciation And Amortization Total property operating expenses Property Operating Expenses Property management expenses Other Cost And Expense Operating General and administrative expenses General And Administrative Expense Interest expense Interest Expense (Gain) loss on sale of depreciable real estate assets Gain Loss On Sale Of Property Plant Equipment (Gain) loss on sale of non-depreciable real estate assets Gain Loss On Sale Of Non Depreciable Real Estate Assets Other non-operating (income) expense Other Nonoperating Income Expense Income before income tax expense Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Income tax expense Income Tax Expense Benefit Income from continuing operations before real estate joint venture activity Income Loss From Continuing Operations Before Equity Method Investments Income from real estate joint venture Income Loss From Equity Method Investments Net income Profit Loss Net income attributable to noncontrolling interests Net Income Loss Attributable To Noncontrolling Interest Dividends to preferred unitholders Preferred Unit Dividends Income Statement Impact Net income available for shareholders Net Income Loss Dividends to MAA Series I preferred shareholders Preferred Stock Dividends Income Statement Impact Net income available for MAA common shareholders Net Income Loss Available To Common Stockholders Basic Earnings per common share - basic: Earnings Per Share Basic [Abstract] Net income available for MAA common shareholders Earnings Per Share Basic Earnings per common share - diluted: Earnings Per Share Diluted [Abstract] Net income available for MAA common shareholders Earnings Per Share Diluted Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements Of Comprehensive Income [Abstract] Net income Other comprehensive (loss) income: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized loss from derivative instruments Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax Adjustment for net losses (gains) reclassified to net income from derivative instruments Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax Total comprehensive income Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive income Comprehensive Income Net Of Tax Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation Depletion And Amortization Loss on sale of depreciable real estate assets Gain Loss On Disposition Of Assets Loss (gain) on sale of non-depreciable real estate assets Gain On Sale Of Non Depreciable Assets Loss (gain) on embedded derivative in preferred shares Derivative Gain Loss On Derivative Net Stock compensation expense Share Based Compensation Amortization of debt issuance costs, discounts and premiums Amortization Of Debt Discount Premium Net change in operating accounts and other operating activities Other Operating Activities Cash Flow Statement Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of real estate and other assets Payments To Acquire Real Estate And Other Assets Capital improvements, development and other Payments For Capital Improvements Distributions from real estate joint ventures Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital Contributions to affiliates Payments To Acquire Equity Method Investments Proceeds from disposition of real estate assets Proceeds From Sale Of Real Estate Heldforinvestment Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from revolving credit facility Proceeds From Lines Of Credit Repayments of revolving credit facility Repayments Of Lines Of Credit Net proceeds from commercial paper Proceeds From Repayments Of Commercial Paper Proceeds from notes payable Proceeds From Notes Payable Principal payments on notes payable Repayments Of Notes Payable Payment of deferred financing costs Payments Of Financing Costs Distributions to noncontrolling interests Payments Of Dividends Minority Interest Distributions paid on common shares/units Payments Of Dividends Common Stock Distributions paid on preferred shares/units Payments Of Dividends Preferred Stock And Preference Stock Net change in other financing activities Proceeds From Payments For Other Financing Activities Net cash used in financing activities Net Cash Provided By Used In Financing Activities Net (decrease) increase in cash, cash equivalents and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash, cash equivalents and restricted cash, beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Reconciliation of cash, cash equivalents and restricted cash: Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Net Income taxes paid Income Taxes Paid Supplemental disclosure of noncash investing and financing activities: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Conversion of OP Units to shares of common stock Conversion Of Stock Amount Converted1 Accrued construction in progress Construction In Progress Expenditures Incurred But Not Yet Paid Interest capitalized Interest Costs Capitalized Liabilities and Capital [Abstract] Undeveloped land Land Available For Development Liabilities and capital Liabilities And Capital [Abstract] Due to general partner Due To Related Parties Current Operating Partnership capital: Capital [Abstract] Preferred Units, Preferred Partners' Capital Accounts Preferred Units Preferred Partners Capital Accounts General Partners' Capital Account General Partners Capital Account Limited Partners' Capital Account Limited Partners Capital Account Total operating partners’ capital Capital Total equity Partners Capital Including Portion Attributable To Noncontrolling Interest Total liabilities and equity Liabilities And Capital Preferred Units, Issued Preferred Units Issued Preferred Units, Outstanding Preferred Units Outstanding Basic earnings per unit. Diluted earnings per unit. Net income available for MAA common shareholders Net income available for MAALP common unitholders Basic Earnings Per Unit Net income available for MAALP common unitholders Diluted Earnings Per Unit Consolidation and Basis of Presentation and Significant Accounting Policies [Abstract] Consolidation And Basis Of Presentation And Significant Accounting Policies [Abstract] Basis of Presentation and Principles of Consolidation and Significant Accounting Policies Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block] Earnings per common share of MAA. Earnings Per Common Share Of M A A [Abstract] Earnings per Common Share of MAA Earnings Per Share [Text Block] Earnings per unit text block. Earnings Per Share [Abstract] Earnings per OP Unit of MAALP Earnings Per Unit [Text Block] Consolidated Statements of Equity [Text Block] MAA Equity. M A A Equity [Abstract] MAA Equity Consolidated Statements Of Equity [Text Block] Consolidated Statements of Changes in Capital [Text Block] MAALP Capital [Abstract] M A A L P Capital [Abstract] MAALP Capital Consolidated Statements Of Changes In Capital [Text Block] Notes to Financial Statements [Abstract] Notes To Financial Statements [Abstract] Borrowings Debt Disclosure [Text Block] Fair Value Disclosures [Abstract] Financial Instruments and Derivatives Fair Value Disclosures [Text Block] Shareholders' Equity of MAA [Abstract] Shareholders Equity Of M A A [Abstract] Shareholders' Equity of MAA Stockholders Equity Note Disclosure [Text Block] Partners Capital Notes [Abstract] Partners' Capital of MAALP Partners Capital Notes Disclosure [Text Block] Loss Contingency [Abstract] Commitments and Contingencies Legal Matters And Contingencies [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Real Estate [Abstract] Real Estate Acquisitions and Dispositions Mergers Acquisitions And Dispositions Disclosures [Text Block] Basis of presentation and principles of consolidation, policy. Accounting Policies [Abstract] Basis of Presentation and Principles of Consolidation Basis Of Presentation And Principles Of Consolidation Policy Policy [Text Block] Reclassifications Prior Period Reclassification Adjustment Description Noncontrolling Interests Policy Text Block. Noncontrolling Interests Noncontrolling Interests Policy [Text Block] Investments in Unconsolidated Affiliates Equity Method Investments Policy Fair value Measurements Fair Value Measurement Policy Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Leases Lessee Leases Policy [Text Block] Recently Adopted Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Computation of Diluted Earnings per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of earnings per unit basic and diluted. Schedule of Diluted Earnings per Common Unit Schedule Of Earnings Per Unit Basic And Diluted Table [Text Block] Shareholders' Equity [Table Text Block] Summary of Changes in Total Equity and its Components Shareholders Equity Table [Text Block] Partners' Capital [Table Text Block] Summary of Changes in Total Capital and its Components Partners Capital Table [Text Block] Debt Disclosure [Abstract] Summary of Outstanding Debt Schedule Of Debt Table [Text Block] Effect of Derivative Instruments on Consolidated Statement of Operations Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block] Schedule of Cumulative Redeemable Preferred Stock Schedule Of Stock By Class [Text Block] Schedule of Operating Lease Obligations Lessee Operating Lease Liability Maturity Table [Text Block] Revenues and NOI for Reportable Segment Reconciliation Of Operating Profit Loss From Segments To Consolidated [Text Block] Assets for Reportable Segment Reconciliation Of Assets From Segment To Consolidated [Text Block] Schedule of real estate asset acquisitions and dispositions. Schedule of Real Estate Asset Acquisitions and Dispositions Schedule Of Real Estate Asset Acquisitions And Dispositions Table [Text Block] Disclosure - Basis of Presentation and Principles of Consolidation and Significant Accounting Policies - Additional Information (Details) [Abstract] Disclosure Basis Of Presentation And Principles Of Consolidation And Significant Accounting Policies Additional Information Details [Abstract] Schedule Of Real Estate Properties [Table] Schedule Of Real Estate Properties [Table] Ownership Ownership [Axis] Ownership Ownership [Domain] MAALP. M A A L P M A A L P [Member] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Development Properties [Member] Development Properties Development Properties [Member] Retail Retail [Member] Commercial Real Estate [Member] Commercial Real Estate [Member] Scenario Statement Scenario [Axis] Scenario Scenario Unspecified [Domain] Expected Costs [Member] Expected Costs Expected Costs [Member] Costs Incurred to Date [Member] Costs Incurred To Date Costs Incurred To Date [Member] Scenario Forecast [Member] Scenario Forecast [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Revision of Prior Period Restatement [Axis] Revision of Prior Period Restatement [Domain] Previously Reported [Member] Scenario Previously Reported [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] General and Administrative Expenses [Member] General And Administrative Expense [Member] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Real Estate Real Estate [Member] Consolidated Entities Consolidated Entities [Axis] Consolidated Entities Consolidated Entities [Domain] Variable Interest Entity Primary Beneficiary [Member] Variable Interest Entity Primary Beneficiary [Member] Real Estate Property Ownership Real Estate Properties [Axis] Real Estate Properties Real Estate Properties [Domain] Post Massachusetts Avenue [Member] Post Massachusetts Avenue [Member] Post Massachusetts Avenue [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Accounting Standards Update Type Of Adoption [Member] Accounting Standards Update 2016-02 [Member] Accounting Standards Update201602 [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Limited Liability Company L L C Or Limited Partnership L P Managing Member Or General Partner Ownership Interest Property Held for Development Number of Real Estate Properties Number Of Real Estate Properties Number of units under development community Number Of Units Under Development Community Square Footage of Real Estate Property Area Of Real Estate Property Number of States in which Entity Operates Number Of States In Which Entity Operates Percentage Of Ownership Interests Percentage of ownership interests of all consolidated subsidiaries (percent) Percentage Of Ownership Interests Other non-operating expense (income) Consolidated assets Consolidated liabilities Real Estate Investments, Joint Ventures Real Estate Investments Joint Ventures Percentage of our total property revenues and total non-property income from leasing of apartment homes, excluding income on deferred compensation plans. Percentage Of Reimbursable Revenue From Leasing Of Apartment Homes Percentage of Rental Revenue and Other Income From Non-leasing Activities Operating lease, term of contract Lessor Operating Lease Term Of Contract Percentage Of Rental Revenue From Leasing Of Apartment Homes Percentage Of Rental Revenue And Other Income From Leasing Of Apartment Homes Percentage Of Reimbursable Revenue From Leasing Of Apartment Homes Percentage Of Reimbursable Revenue From Leasing Of Apartment Homes Percentage of Rental Revenue and Other Income From Non-leasing Activities Percentageof Rental Revenueand Other Income From Nonleasing Activities Operating Lease, Right-of-Use Asset Operating Lease Right Of Use Asset Operating Lease, Liability Operating Lease Liability Operating Lease, Weighted Average Remaining Lease Term Operating Lease Weighted Average Remaining Lease Term1 Operating Lease, Weighted Average Discount Rate, Percent Operating Lease Weighted Average Discount Rate Percent Adjusted income (loss) from continuing operations available for common shareholders, basic. Adjusted income (loss) from continuing operations available for common shareholders, diluted. Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Limited Partnership Units [Member] Limited Partnership Units [Member] Limited Partnership Units [Member] Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Line Items] Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Income from continuing operations attributable to noncontrolling interests Income Loss From Continuing Operations Attributable To Noncontrolling Entity Income from continuing operations allocated to unvested restricted shares Income Loss From Continuing Operations Allocated To Unvested Restricted Shares Dividends, Preferred Stock, Cash Dividends Preferred Stock Cash Income from continuing operations available for common shareholders, adjusted Adjusted Income Loss From Continuing Operations Available For Common Shareholders Basic Weighted average common shares - basic Weighted Average Number Of Shares Outstanding Basic Earnings per share - basic Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Incomefrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Income from continuing operations attributable to noncontrolling interests Incomefrom Continuing Operations Attributableto Noncontrolling Interest Net income available for MAA common shareholders, adjusted Adjusted Income Loss From Continuing Operations Available For Common Shareholders Diluted Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average common shares - diluted Weighted Average Number Of Diluted Shares Outstanding Earnings per share - diluted Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Earnings Per OP Unit of MAALP [Abstract] Earnings Per O P Unitof M A A L P [Abstract] Net Loss or Income Per Unit Disclosure [Table] Net Loss Or Income Per Unit Disclosure [Table] Net Loss Or Income Per Unit Disclosure [Table] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income from continuing operations allocated to unvested restricted shares Income From Continuing Operations Allocated To Unvested Restricted Shares Weighted average common units - basic Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted Earnings per common unit - diluted Net Income Including Portion Attributable to Noncontrolling Interest Net Income Attributable to Parent Net Income Attributable to Noncontrolling Interest Fair value option and measurement. Amortization of unearned compensation Stockholders' Equity Including Noncontrolling Interest Stock Issued in Exchange for Redeemable Stock Equity [Line Items] Equity Disclosure [Table] Equity Disclosure [Table] Equity Disclosure [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Preferred Stock [Member] Preferred Stock [Member] Additional Paid-in Capital [Member] Additional Paid In Capital [Member] Accumulated Distributions in Excess of Net Income [Member] Accumulated Distributions In Excess Of Net Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Noncontrolling Interest Operating Partnership. Noncontrolling Interest Operating Partnership Noncontrolling Interest Operating Partnership [Member] Noncontrolling Interest Noncontrolling Interest [Member] Mid-America Apartment Communities, Inc. Shareholders' Equity. Mid America Apartment Communities Inc Shareholders Equity Mid America Apartment Communities Inc Shareholders Equity [Member] Equity [Line Items] Equity [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase Decrease In Stockholders Equity Roll Forward Beginning Balance Stockholders Equity Including Noncontrolling Interest Net Income Including Portion Attributable to Noncontrolling Interest Net Income Including Portion Attributableto Noncontrolling Interest Net income attributable to MAA Net Income Attributableto Parent Net Income Attributable to Noncontrolling Interest Net Income Attributableto Noncontrolling Interest Other comprehensive income (loss) - derivatives instruments (cash flow hedges) Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Issuance and registration of common shares Stock Issued During Period Value New Issues Shares repurchased and retired Stock Repurchased And Retired During Period Value Exercise of stock options Stock Issued During Period Value Stock Options Exercised Shares issued in exchange for units Stock Issued During Period Value Conversion Of Units Shares issued in exchange for redeemable stock Stock Issued In Exchange For Redeemable Stock Redeemable stock fair market value adjustment Effect On Retained Earnings Accumulated Deficit Due To Fair Value Option And Measurement Adjustment for noncontrolling interests in Operating Partnership Minority Interest Period Increase Decrease Amortization of unearned compensation Amortization Unearned Compensation Dividends on common stock Dividends Common Stock Dividends on noncontrolling interest units Minority Interest Decrease From Distributions To Noncontrolling Interest Holders Contribution from noncontrolling interest Partners Capital Account Contributions Ending Balance Common Stock, Dividends, Per Share, Declared Common Stock Dividends Per Share Declared Net Income Available for Common Unitholders Units Issued during period value new issues net. Units Repurchased and Retired During Period, Value. Units Issued During Period, Value, Unit Options Exercised General Partnership Units Issued in Exchange for Limited Partnership Units Adjustment for limited partners' capital at redemption value. Distributions Partnership units issued in exchange for redeemable units [Line Items] for Capital Disclosure [Table] Capital Disclosure [Table] Capital Disclosure [Table] Capital Disclosure [Table] AOCI Attributable to Noncontrolling Interest [Member] Aoci Attributable To Noncontrolling Interest [Member] Noncontrolling Interests-Consolidated Real Estate Entities [Member] Partner Capital Components Partner Capital Components [Axis] Partner Capital Components Partner Capital Components [Domain] General Partners' Capital Account [Member] General Partners' Capital Account [Member] General Partners Capital Account [Member] Capital Disclosure [Line Items] Capital Disclosure [Line Items] Increase (Decrease) in Partners' Capital [Roll Forward] Increase Decrease In Partners Capital Roll Forward Beginning Balance Partners Capital Net income Net Income Loss Allocated To Limited Partners Net Income Allocated to General Partners Net Income Loss Allocated To General Partners Net Income Available for Common Unitholders Net Income Available For Common Unitholders Issuance of units Units Issued During Period Value New Issues Net Units repurchased and retired Units Repurchased And Retired During Period Value Exercise of unit options Units Issued During Period Value Unit Options Exercised General partnership units issued in exchange for limited partnership units General Partnership Units Issued In Exchange For Limited Partnership Units Units issued in exchange for redeemable units Partnership Units Issued In Exchange For Redeemable Units Adjustment for limited partners’ capital at redemption value Adjustment For Limited Partners Capital At Redemption Value Distributions Distributions Contribution from noncontrolling interest Ending Balance Disclosure M A A L P Capital Summary Of Changes In Total Capital And Its Components Parenthetical Details [Abstract] Disclosure M A A L P Capital Summary Of Changes In Total Capital And Its Components Parenthetical Details [Abstract] Distribution Made to Limited Partner, Distributions Declared, Per Unit Distribution Made To Limited Partner Distributions Declared Per Unit Disclosure - Debt Structure [Abstract] Disclosure Debt Structure [Abstract] Debt Instrument [Table] Debt Instrument [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Unsecured Debt [Member] Unsecured Debt [Member] Secured Debt [Member] Secured Debt [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Commercial Paper Notes [Member] Commercial Paper [Member] Variable Rate Debt [Member] Variable Rate Debt [Member] Variable Rate Debt [Member] $1 billion unsecured revolving credit faciltiy [Member] $1 billion unsecured revolving credit facility [Member] A1 Billion Unsecured Revolving Credit Faciltiy [Member] Debt Information [Axis] Debt Information Debt Information [Axis] Debt Information [Domain] Debt Information Debt Information [Domain] Variable Rate Credit Facility [Member] Variable Rate Credit Facility [Member] Variable Rate Credit Facility [Member] Variable Rate Commercial Paper Program [Member] Variable Rate Commercial Paper Program [Member] Variable Rate Commercial Paper Program [Member] Fixed Rate Debt Senior Notes [Member] Fixed Rate Debt Senior Notes [Member] Fixed Rate Debt Senior Notes [Member] Fair Market Value Adjustment and Debt Issuance Cost [Member] Fair Market Value Adjustment and Debt Issuance Cost [Member] Fair Market Value Adjustmentand Debt Issuance Cost [Member] Fixed Rate Debt Senior Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Line of Credit Facility, Amount Outstanding Line Of Credit Unsecured Debt Commercial Paper Debt Instrument, Face Amount Debt Instrument Face Amount Unsecured Debt Total Outstanding Debt Notes Payable Debt Instrument, Face Amount Mortgage Loans On Real Estate Debt Instrument, Interest Rate, Effective Percentage Debt Instrument Interest Rate Effective Percentage Contract Maturity Debt Instrument Maturity Date Disclosure - Notes Payable - Additional Information [Abstract] Disclosure Notes Payable Additional Information [Abstract] $1 billion unsecured revolving credit facility [Member] $1 Billion Unsecured Revolving Credit Faciltiy [Member] A1 Billion Unsecured Revolving Credit Facility [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Average [Axis] Average Average [Axis] [Domain] for Average [Axis] Average Average [Domain] years to maturity [Member] Years to Maturity [Member] Yearstomaturity [Member] Public Income Notes [Member] Income Notes [Member] Private Placement [Member] Private Placement [Member] Wells Fargo Term Loan [Member] Wells Fargo Term Loan [Member] Wells Fargo Term Loan [Member] Line of Credit Facility, Current Borrowing Capacity Line Of Credit Facility Current Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line Of Credit Facility Maximum Borrowing Capacity Debt Instrument, Basis Spread on Variable Rate Debt Instrument Basis Spread On Variable Rate1 Debt Instrument, Maturity Date Letters of Credit Outstanding, Amount Letters Of Credit Outstanding Amount Debt Instrument, Payment Terms Debt Instrument Payment Terms Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument Unused Borrowing Capacity Amount Debt Instrument, Term Debt Instrument Term Number of term loans. Debt instrument maturity period. Number of Term Loans Number Of Term Loans Debt Instrument Maturity Period Debt Instrument Maturity Period Notes Payable Excluding Interest Rate Swaps and Cap Agreements Debt Renewal Period Derivative [Table] Derivative [Table] Fixed Rate Debt [Member] Fixed Rate Debt [Member] Fixed Rate Debt [Member] Floating Rate Debt [Member] Floating Rate Debt [Member] Floating Rate Debt [Member] Conventional Variable Rate Debt [Member] Conventional Variable Rate Debt [Member] Conventional Variable Rate Debt [Member] Measurement Frequency Fair Value By Measurement Frequency [Axis] Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value Measurements Recurring [Member] Hedging Designation Hedging Designation [Axis] Hedging Designation Hedging Designation [Domain] Designated as Hedging Instrument Designated As Hedging Instrument [Member] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Interest Expense Interest Expense [Member] Derivative [Line Items] Derivative [Line Items] Notes Payable Excluding Interest Rate Swaps and Cap Agreements Notes Payable Excluding Interest Rate Swaps And Cap Agreements Notes Payable, Fair Value Disclosure Notes Payable Fair Value Disclosure Debt Renewal Period Debt Renewal Period Preferred Stock, Redemption Price Per Share Preferred Stock Redemption Price Per Share Preferred Stock, Redemption Date Preferred Stock Redemption Date Embedded Derivative, Fair Value of Embedded Derivative Asset Embedded Derivative Fair Value Of Embedded Derivative Asset Derivative, Number of Instruments Held Derivative Number Of Instruments Held Interest Rate Derivative Assets, at Fair Value Interest Rate Derivative Assets At Fair Value Change in fair value of interest rate derivatives included in AOCI and expected to be reclassified in the next 12 months Derivative Instruments Gain Loss Reclassification From Accumulated O C I To Income Estimated Net Amount To Be Transferred Disclosure - Financial Instruments and Derivatives - Effect of Derivative Instruments on Consolidated Statement of Operations (Details) [Abstract] Disclosure Financial Instruments And Derivatives Effect Of Derivative Instruments On Consolidated Statement Of Operations Details [Abstract] Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Interest Rate Contract Interest Rate Contract [Member] Not Designated as Hedging Instrument Nondesignated [Member] Unrealized (loss) from the effective portion of derivative instruments Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net Derivative Instruments, Gain (Loss) Recognized in Income, Net Common Shares Issuable upon Conversion of Convertible Stock Common Shares and Operating Partnership Units, Outstanding Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Employee Stock Option Employee Stock Option [Member] Equity Option Stock Option [Member] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] At the market offering. At The Market Offering At The Market Offering [Member] Common Shares Issuable Upon Conversion Of Convertible Stock Common Shares Issuable Upon Conversion Of Convertible Stock Total common shares and operating partnership units outstanding Common Shares And Operating Partnership Units Outstanding Common stock shares, outstanding option Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Stock Issued During Period, Shares, New Issues Stock Issued During Period Shares New Issues Proceeds from Stock Options Exercised, Net Proceeds From Stock Options Exercised Redeemable Preferred Stock [Member] Redeemable Preferred Stock [Member] Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred Stock Dividend Rate Per Dollar Amount Preferred Stock, Liquidation Preference, Value Preferred Stock Liquidation Preference Value Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Number of shares remaining for issuance. Common stock shares sold Sale Of Stock Number Of Shares Issued In Transaction Remaining common stock to be issued Number Of Shares Remaining For Issuance Operating Partnership Units, Outstanding [Line Items] for Schedule of Capital Structure [Table] Schedule of Capital Structure [Table] Schedule Of Capital Structure [Table] Schedule Of Capital Structure [Table] Schedule Of Capital Structure [Line Items] Schedule Of Capital Structure [Line Items] Operating partnership units outstanding Operating Partnership Units Outstanding Redeemable Capital Shares, Par or Stated Value Per Share Redeemable Capital Shares Par Or Stated Value Per Share Redeemable Capital Shares Par Or Stated Value Per Share Lease expiration year. Loss Contingencies [Table] Loss Contingencies [Table] Real Estate, Type of Property Mortgage Loans On Real Estate Description Type Of Property [Axis] Real Estate Mortgage Loans On Real Estate Name Property Type [Domain] Apartment Communities [Member] Apartment Building [Member] Office Lease [Member] Office Building [Member] Litigation Case Litigation Case [Axis] Litigation Case Litigation Case Type [Domain] Cleven Litigation Case [Member] Cleven Litigation Case [Member] Cleven Litigation Case [Member] Brown Litigation Case [Member] Brown Litigation Case [Member] Brown Litigation Case [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Lease expiration year Lease Expiration Year Operating Leases, Future Minimum Payments Due, Next Twelve Months Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Lessee Operating Lease Liability Payments Due Year Two Operating Leases, Future Minimum Payments, Due in Three Years Lessee Operating Lease Liability Payments Due Year Three Operating Leases, Future Minimum Payments, Due in Four Years Lessee Operating Lease Liability Payments Due Year Four Operating Leases, Future Minimum Payments, Due in Five Years Lessee Operating Lease Liability Payments Due Year Five Operating Leases, Future Minimum Payments, Due Thereafter Lessee Operating Lease Liability Payments Due After Year Five Operating Leases, Future Minimum Payments Due Lessee Operating Lease Liability Payments Due Net present value adjustments Lessee Operating Lease Liability Undiscounted Excess Amount Loss Contingency, Estimate of Possible Loss Loss Contingency Estimate Of Possible Loss Loss Contingency Accrual Loss Contingency Accrual At Carrying Value Segment Reporting Disclosure Of Entitys Reportable Segments [Abstract] Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Segments Statement Business Segments [Axis] Segments Segment [Domain] Same Store [Member] Same Store [Member] Same Store [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of owned or owned interests of apartment communities Number of reportable segments Number Of Reportable Segments Period properties owned and stabilized Period properties owned and stabilized Period Properties Owned And Stabilized Occupancy level for stabilized communities. Period Properties Stabilized Occupancy Level for Stabilized Communities Occupancy Level For Stabilized Communities Period Properties Stabilized Period Properties Stabilized Disclosure - Revenues and NOI for Reportable Segment [Abstract] Disclosure Revenues And Noi For Reportable Segment [Abstract] Reconciliation Of Operating Profit Loss From Segments To Consolidated [Table] Reconciliation Of Operating Profit Loss From Segments To Consolidated [Table] Non Same Store and Other [Member] Non-Same Store and Other Non Same Store And Other [Member] Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] Segment Information Revenue from Contract with Customer, Including Assessed Tax Revenue From Contract With Customer Including Assessed Tax Other Operating Income Other Operating Income Total operating revenues Net Operating Income Operating Income Before Depreciation Depreciation and amortization Other Cost and Expense, Operating General and administrative expenses Interest expense Gain (loss) on sale of depreciable real estate assets Gain (loss) on sale of non-depreciable real estate assets Other non-operating income (expense) Gain (loss) from real estate joint ventures Net income attributable to noncontrolling interests Preferred Stock Dividends, Income Statement Impact Disclosure - Assets for Reportable Segment [Abstract] Disclosure Assets For Reportable Segment [Abstract] Reconciliation Of Assets From Segment To Consolidated [Table] Reconciliation Of Assets From Segment To Consolidated [Table] Corporate assets Corporate [Member] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting Asset Reconciling Item [Line Items] Total assets Real estate acquisition date. Acquisitions and Disposals [Line Items] Acquisitions and disposals. Acquisitions And Disposals [Table] Acquisitions And Disposals [Table] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Georgetown member. Georgetown [Member] Georgetown [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Austin, TX [Member] TEXAS Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Land [Member] Land [Member] Business Acquisitions and Dispositions [Line Items] Acquisitionsand Disposals [Line Items] Area of Land Area Of Land Acquisition Date Real Estate Acquisition Date Number of dispose of any apartment communities, land parcels or commercial properties Number Of Units In Real Estate Property