Consolidated Statements of Equity - 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, 2017	$ 1,655,753		$ 125,000	$ 1,231	$ 3,900,383	$ 3,603	$ (2,367,073)		$ 1,663,144		$ (1,716)	$ (5,675)
Balances (in shares) at Dec. 31, 2017			5,000	123,109
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(373,592)			$ (64)	(373,528)				(373,592)
Repurchases of Common Stock (in shares)				(6,437)
Issuance of Aimco Operating Partnership units	50,151											50,151
Redemption of Aimco Operating Partnership units	(9,639)								0		0	(9,639)
Amortization of share-based compensation cost	9,765				8,074				8,074			1,691
Amortization of share-based compensation cost (in shares)				17
Effect of changes in ownership for consolidated entities	(10,101)				(19,115)				(19,115)			9,014
Change in accumulated other comprehensive income	1,260					1,191			1,191			69
Net income	708,864						666,227		666,227		8,220	34,417
Distributions to noncontrolling interests	(22,310)										(9,471)	(12,839)
Common Stock dividends	(238,067)						(238,067)		(238,067)
Preferred Stock dividends	(8,594)						(8,594)		(8,594)
Other, net	151			$ 1	150		0		151
Other, net (in shares)				111
Balances at Dec. 31, 2018	1,763,641		$ 125,000	$ 1,168	3,515,964	4,794	(1,947,507)		1,699,419		(2,967)	67,189
Balances (in shares) at Dec. 31, 2018			5,000	116,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(20,682)			$ (4)	(20,678)				(20,682)
Repurchases of Common Stock (in shares)			0	(372)
Redemption of Preferred Stock	(125,000)		$ (125,000)		4,089		(4,089)		(125,000)
Redemption of Preferred Stock (in shares)			(5,000)
Issuance of Aimco Operating Partnership units	3,034											3,034
Redemption of Aimco Operating Partnership units	(6,467)			$ 1	6,242				6,243		0	(12,710)
Redemption of Aimco Operating Partnership units (in shares)				103
Amortization of share-based compensation cost	9,108				5,924				5,924			3,184
Amortization of share-based compensation cost (in shares)				18
Effect of changes in ownership for consolidated entities	0				(13,243)				(13,243)		3,422	9,821
Purchase of noncontrolling interests in consolidated real estate partnerships	(3,844)										(3,844)
Change in accumulated other comprehensive income	(637)					(599)			(599)			(38)
Net income	500,514						474,083		474,083		382	26,049
Distributions to noncontrolling interests	(13,395)										(308)	(13,087)
Common Stock dividends	(241,643)						(241,643)		(241,643)
Common Stock issued to Common Stockholders in special dividend	(740)			$ 36	(776)				(740)
Common Stock issued to Common Stockholders in special dividend (in shares)				3,628
Preferred Stock dividends	(3,246)						(3,246)		(3,246)
Other, net	152			$ 1	132		0		133		19
Other, net (in shares)				65
Balances at Dec. 31, 2019	1,860,795		$ 0	$ 1,202	3,497,654	4,195	(1,722,402)		1,780,649		(3,296)	83,442
Balances (in shares) at Dec. 31, 2019			0	120,242
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of Preferred Stock (in shares)			5,000
Repurchases of Common Stock	(10,004)			$ (2)	(10,002)				(10,004)
Repurchases of Common Stock (in shares)			0	(189)
Issuance of Preferred Stock	2,000		$ 2,000						2,000
Issuance of Preferred Stock, Shares			20
Redemption of Aimco Operating Partnership units	(2,642)			$ 3	5,136				5,139		0	(7,781)
Redemption of Aimco Operating Partnership units (in shares)				128
Amortization of share-based compensation cost	9,241				4,900				4,900			4,341
Amortization of share-based compensation cost (in shares)				20
Effect of changes in ownership for consolidated entities	438,470				494,589				494,589		(61,320)	5,201
Contribution from noncontrolling interest in consolidated realestate partnerships	4,701										4,701
Change in accumulated other comprehensive income	(1,236)					(1,156)			(1,156)			(80)
Net income	(109,944)						(104,127)		(104,127)		(379)	(5,438)
Distributions to noncontrolling interests	(18,182)										(1,682)	(16,500)
Common Stock dividends	(304,992)						(304,992)		(304,992)
Common Stock issued to Common Stockholders in special dividend				$ 286	(286)
Common Stock issued to Common Stockholders in special dividend (in shares)				28,629
Distributions to Aimco for the business separation	(559,856)				(559,753)				(559,753)		(103)
Other, net	19				(117)		0		(117)		136
Other, net (in shares)				31
Balances at Dec. 31, 2020	$ 1,308,093	$ (277)	$ 2,000	$ 1,489	$ 3,432,121	$ 3,039	$ (2,131,798)	$ (277)	$ 1,306,851	$ (277)	$ (61,943)	$ 63,185
Balances (in shares) at Dec. 31, 2020			20	148,861