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MAA Equity - Summary of Changes in Total Equity and its Components (Parenthetical) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
M A A Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.9600	$ 0.9225	$ 1.9200	$ 1.8450

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- Definition

MAA Equity.

+ References

No definition available.

+ Details

Name:	maa_MAAEquityAbstract
Namespace Prefix:	maa_
Data Type:	xbrli:stringItemType
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Period Type:	duration

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- 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

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Balance Type:	na
Period Type:	duration