Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES:
Tax credit and transaction revenues	$ 6,987	$ 13,243	$ 21,323
Total revenues	972,410	1,005,437	995,854
OPERATING EXPENSES:
Depreciation and amortization	377,786	366,184	333,066
General and administrative expenses	46,268	43,657	46,784
Other expenses, net	3,778	11,148	14,295
Provision for real estate impairment loss	0	35,881	0
Total operating expenses	756,654	811,454	749,058
Interest income	10,914	8,332	7,797
Interest expense	(200,634)	(194,615)	(196,389)
Gain on dispositions of real estate and the Asset Management Business	677,463	300,849	400,156
Other, net	77	7,694	6,071
Income before income tax benefit	703,576	316,243	464,431
Income tax benefit (Note 9)	13,027	30,836	18,842
Net income	716,603	347,079	483,273
Noncontrolling interests:
Net income attributable to noncontrolling interests in consolidated real estate partnerships	(8,220)	(9,084)	(25,256)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(7,739)	(7,764)	(7,239)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(34,417)	(14,457)	(20,368)
Net income attributable to noncontrolling interests	(50,376)	(31,305)	(52,863)
Net income attributable to the company	666,227	315,774	430,410
Net income attributable to the company's preferred equityholders	(8,593)	(8,594)	(11,994)
Net income attributable to participating securities	(1,037)	(319)	(635)
Net income attributable to Aimco common stockholders	$ 656,597	$ 306,861	$ 417,781
Net income attributable to the company per common share/unit - basic (in dollars per share)	$ 4.21	$ 1.96	$ 2.68
Net income attributable to the company per common share/unit - diluted (in dollars per share)	$ 4.21	$ 1.96	$ 2.67
Weighted average common shares/units outstanding - basic (in shares)	155,866	156,323	156,001
Weighted average common shares/units outstanding - diluted (in shares)	156,053	156,796	156,391
Asset Management
REVENUES:
Rental and other property revenues	$ 42,830	$ 74,046	$ 74,640
OPERATING EXPENSES:
Property operating expenses	20,921	35,458	36,956
Aimco Real Estate
REVENUES:
Rental and other property revenues	922,593	918,148	899,891
OPERATING EXPENSES:
Property operating expenses	307,901	319,126	317,957
AIMCO Properties, L.P.
REVENUES:
Tax credit and transaction revenues	6,987	13,243	21,323
Total revenues	972,410	1,005,437	995,854
OPERATING EXPENSES:
Depreciation and amortization	377,786	366,184	333,066
General and administrative expenses	46,268	43,657	46,784
Other expenses, net	3,778	11,148	14,295
Provision for real estate impairment loss	0	35,881	0
Total operating expenses	756,654	811,454	749,058
Interest income	10,914	8,332	7,797
Interest expense	(200,634)	(194,615)	(196,389)
Gain on dispositions of real estate and the Asset Management Business	677,463	300,849	400,156
Other, net	77	7,694	6,071
Income before income tax benefit	703,576	316,243	464,431
Income tax benefit (Note 9)	13,027	30,836	18,842
Net income	716,603	347,079	483,273
Noncontrolling interests:
Net income attributable to noncontrolling interests in consolidated real estate partnerships	(8,220)	(9,084)	(25,256)
Net income attributable to the company	708,383	337,995	458,017
Net income attributable to the company's preferred equityholders	(16,332)	(16,358)	(19,233)
Net income attributable to participating securities	(1,177)	(337)	(635)
Net income attributable to Aimco common stockholders	$ 690,874	$ 321,300	$ 438,149
Net income attributable to the company per common share/unit - basic (in dollars per share)	$ 4.22	$ 1.96	$ 2.68
Net income attributable to the company per common share/unit - diluted (in dollars per share)	$ 4.21	$ 1.96	$ 2.67
Weighted average common shares/units outstanding - basic (in shares)	163,846	163,746	163,761
Weighted average common shares/units outstanding - diluted (in shares)	164,033	164,218	164,151
AIMCO Properties, L.P. | Asset Management
REVENUES:
Rental and other property revenues	$ 42,830	$ 74,046	$ 74,640
OPERATING EXPENSES:
Property operating expenses	20,921	35,458	36,956
AIMCO Properties, L.P. | Aimco Real Estate
REVENUES:
Rental and other property revenues	922,593	918,148	899,891
OPERATING EXPENSES:
Property operating expenses	$ 307,901	$ 319,126	$ 317,957