Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ 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)		$ 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				120,242,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(10,004)			$ (2)	(10,002)				(10,004)
Repurchases of Common Stock (in shares)				(189,000)
Redemption of AIR Operating Partnership units	(1,255)			$ 1	5,136				5,137			(6,392)
Redemption of AIR Operating Partnership units (in shares)				128,000
Amortization of share-based compensation cost	5,111				3,009				3,009			2,102
Amortization of share-based compensation cost (in shares)				20,000
Effect of changes in ownership for consolidated entities	0				(4,348)				(4,348)		36	4,312
Change in accumulated other comprehensive income (loss)	(415)					(388)			(388)			(27)
Net income (loss)	48,677						45,977		45,977		225	2,475
Common Stock dividends	(121,859)						(121,859)		(121,859)
Distributions to noncontrolling interests	(6,606)										(108)	(6,498)
Other, net	(69)				116				116		(47)
Other, net (in shares)				24,000
Balances at Jun. 30, 2020	1,774,236			$ 1,201	3,491,565	3,807	(1,798,561)		1,698,012		(3,190)	79,414
Balances (in shares) at Jun. 30, 2020				120,225,000
Balances at Mar. 31, 2020	1,795,548			$ 1,200	3,488,898	4,139	(1,776,782)		1,717,455		(3,409)	81,502
Balances (in shares) at Mar. 31, 2020				120,092,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of AIR Operating Partnership units	286			$ 1	5,136				5,137			(5,423)
Redemption of AIR Operating Partnership units (in shares)				128,000
Amortization of share-based compensation cost	2,131				1,080				1,080			1,051
Amortization of share-based compensation cost (in shares)				4
Effect of changes in ownership for consolidated entities	0				(3,579)				(3,579)		36	3,543
Change in accumulated other comprehensive income (loss)	(355)					(332)			(332)			(23)
Net income (loss)	41,469						39,255		39,255		107	2,107
Common Stock dividends	(61,034)					0	(61,034)		(61,034)			0
Distributions to noncontrolling interests	(3,378)						0		0		(35)	(3,343)
Other, net	141				30	0	0		30		111	0
Other, net (in shares)				1
Balances at Jun. 30, 2020	1,774,236			$ 1,201	3,491,565	3,807	(1,798,561)		1,698,012		(3,190)	79,414
Balances (in shares) at Jun. 30, 2020				120,225,000
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			20,000	148,861,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock	342,163			$ 79	342,084				342,163
Issuance of Common Stock (in shares)				7,825,000
Redemption of AIR Operating Partnership units	3,552				1,957				1,957			(5,509)
Redemption of AIR Operating Partnership units (in shares)				43,000
Amortization of share-based compensation cost	4,527				2,544				2,544			1,983
Amortization of share-based compensation cost (in shares)				33,000
Effect of changes in ownership for consolidated entities	0				(4,423)				(4,423)			4,423
Noncontrolling Interest Increase From Subsidiary Equity Issuance	1,998										1,998
Change in accumulated other comprehensive income (loss)	(3,251)					(3,039)			(3,039)			(212)
Net income (loss)	66,221						65,362		65,362		(2,632)	3,491
Common Stock dividends	(131,276)						(131,276)		(131,276)
Preferred Stock dividends	(93)						(93)		(93)
Distributions to noncontrolling interests	(12,037)										(4,834)	(7,203)
Other, net	(1,037)			$ 1	(1,110)		(38)		(1,147)		(120)	230
Other, net (in shares)				95,000
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			20,000	156,857,000
Balances at Mar. 31, 2021	1,322,096		$ 2,000	$ 1,490	3,430,694	1,100	(2,112,381)		1,322,903		(64,619)	63,812
Balances (in shares) at Mar. 31, 2021			20,000	148,975,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock	342,163			$ 79	342,084				342,163
Issuance of Common Stock (in shares)				7,825
Redemption of AIR Operating Partnership units	329			$ 0	1,957	0	0		1,957		0	2,286
Redemption of AIR Operating Partnership units (in shares)				43,000
Amortization of share-based compensation cost	1,889			$ 0	629				629			1,260
Amortization of share-based compensation cost (in shares)				0
Effect of changes in ownership for consolidated entities	0				(1,833)				(1,833)			1,833
Noncontrolling Interest Increase From Subsidiary Equity Issuance	1,998										1,998
Change in accumulated other comprehensive income (loss)	(1,180)					(1,100)			(1,100)			(80)
Net income (loss)	21,290						(17,948)		17,948		(2,397)	945
Common Stock dividends	(67,418)						(67,418)		(67,418)
Preferred Stock dividends	(43)						(43)		(43)
Distributions to noncontrolling interests	(6,868)										(3,432)	(3,436)
Other, net	738				(358)		(53)		(411)		919	230
Other, net (in shares)				14
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			20,000	156,857,000