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Earnings from Discontinued Operations (Summary of Communities Sold) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 Property | Dec. 31, 2013 Property | Dec. 31, 2015 Property | Dec. 31, 2015 Communities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of Properties Sold | 10 | 9 |  |
Number of Real Estate Properties |  |  | 254 | 254

X
- Definition Number of Properties Sold + References No definition available. + Details
Name: | maa_NumberOfPropertiesSold
Namespace Prefix: | maa_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant