XML 15 R36.htm IDEA: XBRL DOCUMENT v3.19.3

MAA Equity - Summary of Changes in Total Equity and its Components (Parenthetical) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Mid America Apartment Communities Inc Shareholders Equity
Equity [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.9600	$ 0.9225	$ 2.8800	$ 2.7675

X

- Definition

Equity [Line Items]

+ References

No definition available.

+ Details

Name:	maa_EquityLineItems
Namespace Prefix:	maa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=maa_MidAmericaApartmentCommunitiesIncShareholdersEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: