Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Aimco Predecessor Equity	Total Aimco Equity	Noncontrolling Interests in Consolidated Real Estate Partnerships	Common Noncontrolling Interests in Aimco Operating Partnership
Balances at Dec. 31, 2019	$ 513,560				$ 513,264	$ 513,264	$ 108	$ 188
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Aimco Predecessor	7,491				7,491	7,491
Net income attributable to noncontrolling interests in consolidated partnerships	5						5
Net income (loss) attributable to common noncontrolling interests in Aimco Operating Partnership	400							400
Contributions from Aimco Predecessor, net	8				7	7		1
Net loss attributable to Aimco common stockholders	7,491
Balances at Jun. 30, 2020	521,464				520,762	520,762	113	589
Balances at Mar. 31, 2020	512,024				511,497	511,497	103	424
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Aimco Predecessor	3,063				3,063	3,063
Net income attributable to noncontrolling interests in consolidated partnerships	10						10
Net income (loss) attributable to common noncontrolling interests in Aimco Operating Partnership	165							165
Contributions from Aimco Predecessor, net	6,202				6,202	6,202
Net loss attributable to Aimco common stockholders	3,063
Balances at Jun. 30, 2020	521,464				$ 520,762	520,762	113	589
Balances at Dec. 31, 2020	559,091	$ 1,490	$ 515,127	$ (16,839)		499,778	31,877	27,436
Balances (in shares) at Dec. 31, 2020		149,036,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of Aimco Operating Partnership units		$ 4	898			902		(902)
Redemption of Aimco Operating Partnership units (in shares)		440,000
Cash paid on redemption of Aimco Operating Partnership units	(40)							(40)
Issuance of common stock in connection with share-base arrangements	1,071	$ 2	1,069			1,071
Issuance of common stock in connection with share-based compensation arrangements (in shares)		232,000
Share-based compensation expense	867		751			751		116
Distribution to noncontrolling interest in consolidated real estate partnerships	(582)						(582)
Net income attributable to noncontrolling interests in consolidated partnerships	566						566
Net income (loss) attributable to common noncontrolling interests in Aimco Operating Partnership	44							44
Net loss attributable to Aimco common stockholders	524			524		524
Other, net	(319)		(305)			(305)	(14)
Other, net (in shares)		(45,000)
Balances at Jun. 30, 2021	561,222	$ 1,496	517,540	(16,315)		502,721	31,847	26,654
Balances (in shares) at Jun. 30, 2021		149,663,000
Balances at Mar. 31, 2021	581,352	$ 1,491	516,051	3,375		520,917	31,884	28,551
Balances (in shares) at Mar. 31, 2021		149,208,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of Aimco Operating Partnership units		$ 4	909			913		(913)
Redemption of Aimco Operating Partnership units (in shares)		440,000
Cash paid on redemption of Aimco Operating Partnership units	(4)							(4)
Share-based compensation expense	638		580			580		58
Distribution to noncontrolling interest in consolidated real estate partnerships	(295)						(295)
Net income attributable to noncontrolling interests in consolidated partnerships	275						275
Net income (loss) attributable to common noncontrolling interests in Aimco Operating Partnership	(1,037)							(1,037)
Net loss attributable to Aimco common stockholders	(19,690)			(19,690)		(19,690)
Other, net	(17)	$ 1				1	(17)	(1)
Other, net (in shares)		15,000
Balances at Jun. 30, 2021	$ 561,222	$ 1,496	$ 517,540	$ (16,315)		$ 502,721	$ 31,847	$ 26,654
Balances (in shares) at Jun. 30, 2021		149,663,000