Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 95,690	$ 17,155
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	92,548	87,168
Gain (loss) on dispositions of real estate, inclusive of related income tax	(50,324)	394
Income Tax Expense (Benefit)	(37,388)	(4,985)
Other adjustments	284	1,196
Net changes in operating assets and operating liabilities	(19,487)	(27,324)
Net cash provided by operating activities	81,323	73,604
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of real estate and deposits related to purchases of real estate	(164,650)	(4,995)
Capital expenditures	(75,601)	(82,151)
Proceeds from dispositions of real estate	69,788	2,179
Purchases of corporate assets	(947)	(2,810)
Other investing activities	(218)	94
Net cash used in investing activities	(171,628)	(87,683)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from non-recourse property debt	360,613	68,535
Principal repayments on non-recourse property debt	(206,262)	(32,026)
Net borrowings on revolving credit facility	11,475	51,770
Payment of dividends to holders of preferred securities	(2,148)	(2,148)
Payment of dividends to holders of Common Stock	(59,652)	(56,328)
Payment of distributions to noncontrolling interests	(11,902)	(5,790)
Purchases and redemptions of noncontrolling interests	(8,341)	(4,628)
Other financing activities	3,012	2,167
Net cash provided by financing activities	86,795	21,552
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(3,510)	7,473
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	142,541	131,150
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	139,031	138,623
AIMCO Properties, LP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	95,690	17,155
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	92,548	87,168
Gain (loss) on dispositions of real estate, inclusive of related income tax	(50,324)	394
Income Tax Expense (Benefit)	(37,388)	(4,985)
Other adjustments	284	1,196
Net changes in operating assets and operating liabilities	(19,487)	(27,324)
Net cash provided by operating activities	81,323	73,604
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of real estate and deposits related to purchases of real estate	(164,650)	(4,995)
Capital expenditures	(75,601)	(82,151)
Proceeds from dispositions of real estate	69,788	2,179
Purchases of corporate assets	(947)	(2,810)
Other investing activities	(218)	94
Net cash used in investing activities	(171,628)	(87,683)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from non-recourse property debt	360,613	68,535
Principal repayments on non-recourse property debt	(206,262)	(32,026)
Net borrowings on revolving credit facility	11,475	51,770
Payment of dividends to holders of preferred securities	(4,085)	(4,097)
Payment of distributions to General Partner and Special Limited Partner	(59,652)	(56,328)
Payment of distributions to Limited Partners	(2,737)	(2,718)
Payment of distributions to noncontrolling interests	(7,228)	(1,123)
Purchases and redemptions of noncontrolling interests	(1,221)	0
Other financing activities	(4,108)	(2,461)
Net cash provided by financing activities	86,795	21,552
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(3,510)	7,473
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	142,541	131,150
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	$ 139,031	$ 138,623