Earnings per Share and per Unit - Reconciliations of Numerator and Denominator in Calculations of Basic and Diluted Earnings per Share and per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule of Earnings Per Share and Dividends Per Share [Line Items]
Net income (loss) attributable to Aimco	$ (3,602)	$ 239,137	$ (12,419)	$ 247,346
Net income allocated to Aimco participating securities	0	(3,284)	0	(3,410)
Net income (loss) attributable to Aimco common stockholders	$ (3,602)	$ 235,853	$ (12,419)	$ 243,936
Basic weighted-average common stock outstanding	144,195	149,600	145,007	149,694
Diluted share equivalents outstanding	0	823	0	966
Diluted weighted-average common stock outstanding	144,195	150,423	145,007	150,660
Earnings (loss) per share - basic	$ (0.02)	$ 1.58	$ (0.09)	$ 1.63
Earnings (loss) per share - diluted	$ (0.02)	$ 1.57	$ (0.09)	$ 1.62
Aimco OP L.P. [Member]
Schedule of Earnings Per Share and Dividends Per Share [Line Items]
Net income (loss) attributable to Aimco	$ (3,780)	$ 251,796	$ (13,071)	$ 260,440
Net income allocated to Aimco participating securities	0	(3,423)	0	(3,551)
Net income (loss) attributable to Aimco common stockholders	$ (3,780)	$ 248,373	$ (13,071)	$ 256,889
Basic weighted-average common stock outstanding	151,966	157,525	152,795	157,621
Diluted share equivalents outstanding	0	922	0	1,045
Diluted weighted-average common stock outstanding	151,966	158,447	152,795	158,666
Earnings (loss) per share - basic	$ (0.02)	$ 1.58	$ (0.09)	$ 1.63
Earnings (loss) per share - diluted	$ (0.02)	$ 1.57	$ (0.09)	$ 1.62