Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES
Total revenues	$ 229,827	$ 242,481	$ 684,262	$ 740,388
OPERATING EXPENSES
Depreciation and amortization	97,538	96,406	283,027	286,439
General and administrative expenses	11,821	12,479	34,314	37,196
Other expenses, net	4,411	5,780	14,323	13,624
Total operating expenses	191,200	195,527	564,117	590,696
Interest income	2,824	2,712	8,615	7,768
Interest expense	(42,011)	(45,492)	(122,961)	(143,193)
Gain on dispositions of real estate and the Asset Management business	1,146	626,232	356,929	679,738
Other, net	288	(283)	591	141
Income before income tax benefit (expense)	874	630,123	363,319	694,146
Income tax benefit (expense)	3,096	(26,206)	1,942	12,617
Net income	3,970	603,917	365,261	706,763
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	58	(1,794)	(103)	(8,045)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,933)	(1,934)	(5,800)	(5,805)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(116)	(30,198)	(18,787)	(34,093)
Net income attributable to noncontrolling interests	(1,991)	(33,926)	(24,690)	(47,943)
Net income attributable to the company	1,979	569,991	340,571	658,820
Net income attributable to the company's preferred equity holders		(2,148)	(7,335)	(6,445)
Net loss (income) attributable to participating securities	24	(814)	(431)	(1,004)
Net income attributable to the company's common equity holders	$ 2,003	$ 567,029	$ 332,805	$ 651,371
Net income attributable to Aimco per common share – basic	$ 0.01	$ 3.73	$ 2.26	$ 4.29
Net income attributable to Aimco per common share – diluted	$ 0.01	$ 3.73	$ 2.26	$ 4.28
Weighted average common shares/units outstanding - basic	148,434	151,971	147,474	151,928
Weighted average common shares/units outstanding - diluted	148,636	152,193	147,692	152,086
AIMCO Properties, LP [Member]
REVENUES
Total revenues	$ 229,827	$ 242,481	$ 684,262	$ 740,388
OPERATING EXPENSES
Depreciation and amortization	97,538	96,406	283,027	286,439
General and administrative expenses	11,821	12,479	34,314	37,196
Other expenses, net	4,411	5,780	14,323	13,624
Total operating expenses	191,200	195,527	564,117	590,696
Interest income	2,824	2,712	8,615	7,768
Interest expense	(42,011)	(45,492)	(122,961)	(143,193)
Gain on dispositions of real estate and the Asset Management business	1,146	626,232	356,929	679,738
Other, net	288	(283)	591	141
Income before income tax benefit (expense)	874	630,123	363,319	694,146
Income tax benefit (expense)	3,096	(26,206)	1,942	12,617
Net income	3,970	603,917	365,261	706,763
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	58	(1,794)	(103)	(8,045)
Net income attributable to the company	4,028	602,123	365,158	698,718
Net income attributable to the company's preferred equity holders	(1,933)	(4,082)	(13,135)	(12,250)
Net loss (income) attributable to participating securities	43	(941)	(429)	(1,145)
Net income attributable to the company's common equity holders	$ 2,138	$ 597,100	$ 351,594	$ 685,323
Net income attributable to Aimco per common share – basic	$ 0.01	$ 3.73	$ 2.26	$ 4.29
Net income attributable to Aimco per common share – diluted	$ 0.01	$ 3.72	$ 2.26	$ 4.29
Weighted average common shares/units outstanding - basic	156,618	160,088	155,644	159,622
Weighted average common shares/units outstanding - diluted	156,879	160,328	155,971	159,787
Real Estate [Member]
REVENUES
Total revenues	$ 229,827	$ 234,048	$ 684,262	$ 690,571
OPERATING EXPENSES
Property operating expenses	77,430	78,254	232,453	232,572
Real Estate [Member] | AIMCO Properties, LP [Member]
REVENUES
Total revenues	229,827	234,048	684,262	690,571
OPERATING EXPENSES
Property operating expenses	77,430	78,254	232,453	232,572
Asset Management Business [Member]
REVENUES
Total revenues	0	8,433	0	49,817
OPERATING EXPENSES
Property operating expenses	0	2,608	0	20,865
Asset Management Business [Member] | AIMCO Properties, LP [Member]
REVENUES
Total revenues	0	8,433	0	49,817
OPERATING EXPENSES
Property operating expenses	$ 0	$ 2,608	$ 0	$ 20,865