Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
REVENUES
Rental and other property revenues	$ 218,808	$ 224,200	$ 443,360	$ 454,435
OPERATING EXPENSES
Property operating expenses	74,123	75,647	149,603	154,606
Depreciation and amortization	97,689	91,924	198,165	185,489
General and administrative expenses	9,696	11,498	19,804	21,327
Investment management expenses	1,121	1,406	2,305	2,738
Other expenses, net	4,239	3,621	5,881	8,757
Total operating expenses	186,868	184,096	375,758	372,917
Interest income	2,843	3,065	7,366	5,791
Interest expense	(48,802)	(39,541)	(90,138)	(80,950)
Gain on dispositions of real estate	47,238	64,310	47,204	355,783
Mezzanine / Unconsolidated partnerships investment income, net	6,936	0	13,683	0
Income before income tax benefit (expense)	40,325	68,169	46,069	362,445
Income tax benefit (expense)	2,879	1,827	6,112	(1,154)
Net income	43,204	69,996	52,181	361,291
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	17	(70)	(1)	(161)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,859)	(1,933)	(3,728)	(3,867)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(2,107)	(3,534)	(2,475)	(18,671)
Net income attributable to noncontrolling interests	(3,949)	(5,537)	(6,204)	(22,699)
Net income attributable to the company	39,255	64,459	45,977	338,592
Net income attributable to the company's preferred equity holders	0	(5,187)	0	(7,335)
Net income attributable to participating securities	(43)	(38)	(86)	(455)
Net income attributable to the company's common equity holders	$ 39,212	$ 59,234	$ 45,891	$ 330,802
Net income attributable to Aimco per common share – basic and diluted	$ 0.26	$ 0.40	$ 0.31	$ 2.25
Weighted average common shares/units outstanding - basic	148,535	148,367	148,527	146,994
Weighted average common shares/units outstanding - diluted	148,553	148,599	148,670	147,220
AIMCO Properties, LP [Member]
REVENUES
Rental and other property revenues	$ 218,808	$ 224,200	$ 443,360	$ 454,435
OPERATING EXPENSES
Property operating expenses	74,123	75,647	149,603	154,606
Depreciation and amortization	97,689	91,924	198,165	185,489
General and administrative expenses	9,696	11,498	19,804	21,327
Investment management expenses	1,121	1,406	2,305	2,738
Other expenses, net	4,239	3,621	5,881	8,757
Total operating expenses	186,868	184,096	375,758	372,917
Interest income	2,843	3,065	7,366	5,791
Interest expense	(48,802)	(39,541)	(90,138)	(80,950)
Gain on dispositions of real estate	47,238	64,310	47,204	355,783
Mezzanine / Unconsolidated partnerships investment income, net	6,936	0	13,683	0
Income before income tax benefit (expense)	40,325	68,169	46,069	362,445
Income tax benefit (expense)	2,879	1,827	6,112	(1,154)
Net income	43,204	69,996	52,181	361,291
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	17	(70)	(1)	(161)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,859)	(7,120)	(3,728)	(11,202)
Net income attributable to the company	43,221	69,926	52,180	361,130
Net income attributable to participating securities	(43)	11	(86)	(472)
Net income attributable to the company's common equity holders	$ 41,319	$ 62,817	$ 48,366	$ 349,456
Net income attributable to Aimco per common share – basic and diluted	$ 0.26	$ 0.40	$ 0.31	$ 2.25
Weighted average common shares/units outstanding - basic	156,509	156,637	156,584	155,158
Weighted average common shares/units outstanding - diluted	156,527	157,018	156,802	155,517
Unconsolidated Real Estate Partnerships [Member]
OPERATING EXPENSES
Mezzanine / Unconsolidated partnerships investment income, net	$ 170	$ 231	$ 352	$ 303
Unconsolidated Real Estate Partnerships [Member] | AIMCO Properties, LP [Member]
OPERATING EXPENSES
Mezzanine / Unconsolidated partnerships investment income, net	$ 170	$ 231	$ 352	$ 303