XML 41 R50.htm IDEA: XBRL DOCUMENT
v3.20.1

Real Estate Acquisitions and Dispositions - Schedule of Real Estate Asset Acquisitions and Dispositions (Details) - Georgetown [Member] - Austin, TX [Member] - Land [Member] | 3 Months Ended
--- | ---
Mar. 31, 2020 a
Business Acquisitions and Dispositions [Line Items] |
Area of Land | 22
Acquisition Date | 2020-01

X
- Definition Acquisitions and Disposals [Line Items] + References No definition available. + Details
Name: | maa_AcquisitionsandDisposalsLineItems
Namespace Prefix: | maa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Real estate acquisition date. + References No definition available. + Details
Name: | maa_RealEstateAcquisitionDate
Namespace Prefix: | maa_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of land held. + References No definition available. + Details
Name: | us-gaap_AreaOfLand
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=maa_GeorgetownMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |