Shareholders' Equity of MAA - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2023	Aug. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Equity [Line Items]
Common stock, shares outstanding			116,686,730	115,447,252	116,686,730	115,447,252	115,480,336
Total common shares and operating partnership units outstanding			119,834,510	118,643,681	119,834,510	118,643,681
Settled share amount	$ 1.1
Forward price per share	$ 185.23
Net proceeds	$ 203.7
Equity Forward Sale Agreements [Member]
Equity [Line Items]
Stock Issued During Period, Shares, New Issues		1,100,000
Common stock, price per share		$ 190.56
Common shares attributable to dilutive effect of equity forward agreements						17,000
At The Market Offering [Member]
Equity [Line Items]
Common stock shares sold			0	0	0	0
Remaining common stock to be issued					4,000,000
Maximum [Member] | At The Market Offering [Member]
Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			4,000,000		4,000,000
Noncontrolling Interest [Member]
Equity [Line Items]
Common Shares Issuable Upon Conversion Of Convertible Stock			3,147,780	3,196,429	3,147,780	3,196,429