Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 27,366	$ 365,261
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	296,414	283,027
Gain on dispositions of real estate	(47,204)	(356,929)
Income tax benefit	(7,859)	(1,942)
Other adjustments	11,617	10,429
Net changes in operating assets and operating liabilities	(14,458)	(21,098)
Net cash provided by operating activities	265,876	278,748
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of real estate and deposits related to purchases of real estate	(98,573)	(131,613)
Capital expenditures	(272,269)	(292,749)
Proceeds from dispositions of real estate	36,869	422,463
Purchases of corporate assets	(13,539)	(14,825)
Other investing activities	(8,457)	719
Net cash used in investing activities	(355,969)	(16,005)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from non-recourse property debt	608,756	667,965
Principal repayments on non-recourse property debt	(702,354)	(390,346)
Proceeds from term loan	350,000	0
Net repayments of revolving credit facility	(275,000)	(160,360)
Payment of debt issuance costs	(7,663)	(3,625)
Payment of debt extinguishment costs	(13,175)	(840)
Repurchases of common stock or common units	(10,004)	(20,682)
Repurchases of preferred stock or preferred units	0	(125,000)
Payment of dividends to holders of Common Stock	(183,003)	(183,319)
Payment of dividends to holders of Preferred Stock	0	(3,247)
Payment of distributions to noncontrolling interests	(15,863)	(16,320)
Redemptions of noncontrolling interests in the Aimco Operating Partnership	(19,355)	(5,071)
Contribution from noncontrolling interests in consolidated real estate partnerships	463,523	4,911
Purchases of noncontrolling interests in consolidated real estate partnerships	0	(3,780)
Other financing activities	(14,980)	(2,399)
Net cash provided by (used in) financing activities	180,882	(242,113)
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	90,789	20,630
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	177,702	72,595
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	268,491	93,225
AIMCO Properties, LP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	27,366	365,261
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	296,414	283,027
Gain on dispositions of real estate	(47,204)	(356,929)
Income tax benefit	(7,859)	(1,942)
Other adjustments	11,617	10,429
Net changes in operating assets and operating liabilities	(14,458)	(21,098)
Net cash provided by operating activities	265,876	278,748
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of real estate and deposits related to purchases of real estate	(98,573)	(131,613)
Capital expenditures	(272,269)	(292,749)
Proceeds from dispositions of real estate	36,869	422,463
Purchases of corporate assets	(13,539)	(14,825)
Other investing activities	(8,457)	719
Net cash used in investing activities	(355,969)	(16,005)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from non-recourse property debt	608,756	667,965
Principal repayments on non-recourse property debt	(702,354)	(390,346)
Proceeds from term loan	350,000	0
Net repayments of revolving credit facility	(275,000)	(160,360)
Payment of debt issuance costs	(7,663)	(3,625)
Payment of debt extinguishment costs	(13,175)	(840)
Repurchases of common stock or common units	(10,004)	(20,682)
Repurchases of preferred stock or preferred units	0	(125,000)
Payment of distributions to General Partner and Special Limited Partner	(183,003)	(183,319)
Payment of distributions to Limited Partners	(10,136)	(10,211)
Payment of dividends to holders of Preferred Stock	(5,415)	(9,047)
Payment of distributions to noncontrolling interests	(312)	(309)
Redemption of common and preferred units	(19,355)	(5,071)
Contribution from noncontrolling interests in consolidated real estate partnerships	463,523	4,911
Purchases of noncontrolling interests in consolidated real estate partnerships	0	(3,780)
Other financing activities	(14,980)	(2,399)
Net cash provided by (used in) financing activities	180,882	(242,113)
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	90,789	20,630
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	177,702	72,595
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	$ 268,491	$ 93,225