Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUES
Tax credit and transaction revenues	$ 3,519	$ 2,691
Total revenues	247,720	246,481
OPERATING EXPENSES
Depreciation and amortization	92,548	87,168
General and administrative expenses	11,355	10,962
Other expenses, net	2,958	1,738
Total operating expenses	194,343	188,692
Operating income	53,377	57,789
Interest income	2,172	2,192
Interest expense	(47,795)	(47,882)
Other, net	224	465
Income before income taxes and gain on dispositions	7,978	12,564
Income tax benefit	37,388	4,985
Income before gain on dispositions	45,366	17,549
Gain (loss) on dispositions of real estate, inclusive of related income tax	50,324	(394)
Net income	95,690	17,155
Noncontrolling interests:
Net income attributable to noncontrolling interests in consolidated real estate partnerships	(6,206)	(951)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,937)	(1,949)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(3,755)	(557)
Net income attributable to noncontrolling interests	(11,898)	(3,457)
Net income attributable to the company	83,792	13,698
Net income attributable to the company's preferred equity holders	(2,148)	(2,148)
Net income attributable to participating securities	(119)	(59)
Net income attributable to the company's common equity holders	$ 81,525	$ 11,491
Earnings attributable to the company per common share/unit
Net income attributable to the company per common share/unit - basic and diluted (in dollars per share/unit)	$ 0.52	$ 0.07
Dividends declared per common share/unit	$ 0.38	$ 0.36
Weighted average number of shares outstanding - basic	156,609	156,259
Weighted average number of shares outstanding - diluted	156,740	156,754
Asset Management [Member]
REVENUES
Rental and other property revenues	$ 18,808	$ 18,562
OPERATING EXPENSES
Property operating expenses	9,195	9,198
Aimco Real Estate [Member]
REVENUES
Rental and other property revenues	225,393	225,228
OPERATING EXPENSES
Property operating expenses	78,287	79,626
AIMCO Properties, LP [Member]
REVENUES
Tax credit and transaction revenues	3,519	2,691
Total revenues	247,720	246,481
OPERATING EXPENSES
Depreciation and amortization	92,548	87,168
General and administrative expenses	11,355	10,962
Other expenses, net	2,958	1,738
Total operating expenses	194,343	188,692
Operating income	53,377	57,789
Interest income	2,172	2,192
Interest expense	(47,795)	(47,882)
Other, net	224	465
Income before income taxes and gain on dispositions	7,978	12,564
Income tax benefit	37,388	4,985
Income before gain on dispositions	45,366	17,549
Gain (loss) on dispositions of real estate, inclusive of related income tax	50,324	(394)
Net income	95,690	17,155
Noncontrolling interests:
Net income attributable to noncontrolling interests in consolidated real estate partnerships	(6,206)	(951)
Net income attributable to the company	89,484	16,204
Net income attributable to the company's preferred equity holders	(4,085)	(4,097)
Net income attributable to participating securities	(125)	(60)
Net income attributable to the company's common equity holders	$ 85,274	$ 12,047
Earnings attributable to the company per common share/unit
Net income attributable to the company per common share/unit - basic and diluted (in dollars per share/unit)	$ 0.52	$ 0.07
Dividends declared per common share/unit	$ 0.38	$ 0.36
Weighted average number of shares outstanding - basic	163,825	163,814
Weighted average number of shares outstanding - diluted	163,959	164,310
AIMCO Properties, LP [Member] | Asset Management [Member]
REVENUES
Rental and other property revenues	$ 18,808	$ 18,562
OPERATING EXPENSES
Property operating expenses	9,195	9,198
AIMCO Properties, LP [Member] | Aimco Real Estate [Member]
REVENUES
Rental and other property revenues	225,393	225,228
OPERATING EXPENSES
Property operating expenses	$ 78,287	$ 79,626