Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Distributions in Excess of Earnings	Distributions in Excess of Earnings Cumulative Effect, Period of Adoption, Adjustment	Total AIR's Predecessor	Total AIR's Predecessor Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest in Consolidated Real Estate Partnerships	Common Noncontrolling Interests In AIR Operating Partnerships
Balances at Dec. 31, 2019	$ 1,860,795	$ (277)	$ 0	$ 1,202	$ 3,497,654	$ 4,195	$ (1,722,402)	$ (277)	$ 1,780,649	$ (277)	$ (3,296)	$ 83,442
Balances (in shares) at Dec. 31, 2019			0	120,242
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(10,004)			$ 2	10,002				10,004
Repurchases of Common Stock (in shares)				189
Redemption of AIR Operating Partnership units	(1,740)			$ 1	5,135				5,136			(6,876)
Redemption of AIR Operating Partnership units (in shares)				128
Amortization of share-based compensation cost	7,065				3,911				3,911			3,154
Amortization of share-based compensation cost (in shares)				20
Effect of changes in ownership for consolidated entities	447,688				504,361				504,361		(61,320)	4,647
Contribution from noncontrolling interest in consolidated real estate partnerships	4,701										4,701
Change in accumulated other comprehensive income (loss)	(658)					(616)			(616)			(42)
Net income (loss)	22,298						20,970		20,970		194	1,134
Common Stock dividends	(182,893)						(182,893)		(182,893)
Distributions to noncontrolling interests	(10,019)										(178)	(9,841)
Other, net	(159)				154				154		(313)
Other, net (in shares)				25
Balances at Sep. 30, 2020	2,136,797		$ 0	$ 1,201	4,001,213	3,579	(1,884,602)		2,121,391		(60,212)	75,618
Balances (in shares) at Sep. 30, 2020			0	120,226
Balances at Jun. 30, 2020	1,774,236		$ 0	$ 1,201	3,491,565	3,807	(1,798,561)		1,698,012		(3,190)	79,414
Balances (in shares) at Jun. 30, 2020				120,225
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of AIR Operating Partnership units	(484)											(484)
Amortization of share-based compensation cost	1,954				902				902			1,052
Effect of changes in ownership for consolidated entities	(447,695)				(508,716)				(508,716)		61,356	(335)
Contribution from noncontrolling interest in consolidated real estate partnerships	4,701										4,701
Change in accumulated other comprehensive income (loss)	(243)					(228)			(228)			(15)
Net income (loss)	(26,379)						(25,007)		(25,007)		(31)	(1,341)
Common Stock dividends	(61,034)						(61,034)		(61,034)
Distributions to noncontrolling interests	(3,413)										(70)	(3,343)
Other, net	(236)				30				30		(266)
Other, net (in shares)				1
Balances at Sep. 30, 2020	2,136,797		$ 0	$ 1,201	4,001,213	3,579	(1,884,602)		2,121,391		(60,212)	75,618
Balances (in shares) at Sep. 30, 2020			0	120,226
Balances at Dec. 31, 2020	1,308,093		$ 2,000	$ 1,489	3,432,121	3,039	(2,131,798)		1,306,851		(61,943)	63,185
Balances (in shares) at Dec. 31, 2020			20	148,861
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock	342,132			$ 79	342,053				342,132
Issuance of Common Stock (in shares)				7,825
Redemption of AIR Operating Partnership units	3,977			$ 1	8,239				8,240			(12,217)
Redemption of AIR Operating Partnership units (in shares)				169
Amortization of share-based compensation cost	5,928				2,953				2,953			2,975
Amortization of share-based compensation cost (in shares)				33
Effect of changes in ownership for consolidated entities	230				(9,846)				(9,846)			10,076
Contribution from noncontrolling interest in consolidated real estate partnerships	6,126										6,126
Change in accumulated other comprehensive income (loss)	(3,251)					(3,039)			(3,039)			(212)
Net income (loss)	75,289						74,740		74,740		(3,417)	3,966
Common Stock dividends	(200,327)						(200,327)		(200,327)
Preferred Stock dividends	(136)						(136)		(136)
Distributions to noncontrolling interests	(19,428)										(8,744)	(10,684)
Other, net	(1,744)			$ 1	(1,584)		(41)		(1,624)		(120)
Other, net (in shares)				96
Balances at Sep. 30, 2021	1,508,935		$ 2,000	$ 1,570	3,773,936	0	(2,257,562)		1,519,944		(68,098)	57,089
Balances (in shares) at Sep. 30, 2021			20	156,984
Balances at Jun. 30, 2021	1,571,756		$ 2,000	$ 1,569	3,773,173	0	(2,197,843)		1,578,899		(67,531)	60,388
Balances (in shares) at Jun. 30, 2021			20	156,857
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock	(31)				(31)				(31)
Redemption of AIR Operating Partnership units	(425)			$ 1	6,282				6,283			(6,708)
Redemption of AIR Operating Partnership units (in shares)				126
Amortization of share-based compensation cost	1,401				409				409			992
Effect of changes in ownership for consolidated entities	230				(5,423)				(5,423)			5,653
Contribution from noncontrolling interest in consolidated real estate partnerships	4,128										4,128
Net income (loss)	9,068						9,378		9,378		(785)	475
Common Stock dividends	(69,051)						(69,051)		(69,051)
Preferred Stock dividends	(43)						(43)		(43)
Distributions to noncontrolling interests	(7,391)										(3,910)	(3,481)
Other, net	(707)				(474)		(3)		(477)			(230)
Other, net (in shares)				1
Balances at Sep. 30, 2021	$ 1,508,935		$ 2,000	$ 1,570	$ 3,773,936	$ 0	$ (2,257,562)		$ 1,519,944		$ (68,098)	$ 57,089
Balances (in shares) at Sep. 30, 2021			20	156,984