Segment Information - Revenues and NOI for Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Information
Total operating revenues	$ 554,373	$ 551,126	$ 1,653,570	$ 1,641,183
Total property operating expenses, excluding depreciation and amortization	216,064	211,561	632,071	615,159
Net Operating Income	338,309	339,565	1,021,499	1,026,024
Depreciation and amortization	(156,650)	(146,722)	(462,521)	(434,764)
Property management expenses	(18,183)	(17,265)	(56,272)	(54,461)
General and administrative expenses	(12,525)	(12,728)	(40,957)	(42,444)
Interest expense	(46,277)	(42,726)	(136,549)	(124,352)
Gain (loss) on sale of depreciable real estate assets	0	0	71,842	(25)
Other non-operating (expense) income	(1,253)	(1,678)	4,303	2,604
Income tax expense	(1,766)	(670)	(3,404)	(3,485)
Income from real estate joint venture	389	454	1,384	1,405
Net income (loss) attributable to noncontrolling interests	(2,506)	(3,035)	(9,987)	(9,605)
Dividends to MAA Series I preferred shareholders	(922)	(922)	(2,766)	(2,766)
Net income available for MAA common shareholders	98,616	114,273	386,572	358,131
Same Store [Member]
Segment Information
Revenue from Contract with Customer, Including Assessed Tax	517,258	518,924	1,547,421	1,551,887
Other operating income expense net	3,603	3,354	11,220	9,344
Total operating revenues	520,861	522,278	1,558,641	1,561,231
Total property operating expenses, excluding depreciation and amortization	198,833	194,372	584,206	570,371
Real estate taxes	65,852	64,796	198,207	200,619
Personnel	44,715	42,853	129,548	123,589
Utilities	37,166	35,917	104,693	100,320
Building repair and maintenance	27,328	26,696	76,921	74,498
Office operations	8,699	8,763	27,579	25,639
Insurance	7,807	8,284	24,719	24,564
Marketing	7,266	7,063	22,539	21,142
Net Operating Income	322,028	327,906	974,435	990,860
Non-Same Store and Other [Member]
Segment Information
Revenue from Contract with Customer, Including Assessed Tax	33,238	28,455	93,656	78,098
Other operating income expense net	274	393	1,273	1,854
Total operating revenues	33,512	28,848	94,929	79,952
Total property operating expenses, excluding depreciation and amortization	17,231	17,189	47,865	44,788
Net Operating Income	$ 16,281	$ 11,659	$ 47,064	$ 35,164