Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Buildings and improvements	$ 6,493,539	$ 6,552,065
Land	1,731,980	1,756,525
Total real estate	8,225,519	8,308,590
Accumulated depreciation	(2,581,666)	(2,585,115)
Net real estate	5,643,853	5,723,475
Cash and cash equivalents	162,286	36,858
Restricted cash	36,103	35,737
Other assets	441,527	351,541
Assets held for sale	0	42,393
Total assets	6,283,769	6,190,004
LIABILITIES AND EQUITY
Non-recourse property debt, net	3,859,023	3,915,305
Revolving credit facility borrowings	70,000	160,360
Total indebtedness	3,929,023	4,075,665
Accrued liabilities and other	293,279	226,230
Liabilities related to assets held for sale	0	23,177
Total liabilities	4,222,302	4,325,072
Preferred noncontrolling interests/Redeemable Preferred Units	101,195	101,291
Commitments and contingencies (Note 5)
Equity/Partners' Capital:
Perpetual Preferred Stock	125,000	125,000
Common Stock, $0.01 par value, 500,787,260 shares authorized, 148,758,031 and 144,623,034 shares issued/outstanding at March 31, 2019 and December 31, 2018, respectively	1,488	1,446
Additional paid-in capital	3,495,295	3,515,686
Accumulated other comprehensive income	4,851	4,794
Distributions in excess of earnings	(1,742,998)	(1,947,507)
Total Aimco equity	1,883,636	1,699,419
Noncontrolling interests in consolidated real estate partnerships	(2,857)	(2,967)
Common noncontrolling interests in Aimco Operating Partnership	79,493	67,189
Total equity	1,960,272	1,763,641
Total liabilities and equity	6,283,769	6,190,004
AIMCO Properties, LP [Member]
ASSETS
Buildings and improvements	6,493,539	6,552,065
Land	1,731,980	1,756,525
Total real estate	8,225,519	8,308,590
Accumulated depreciation	(2,581,666)	(2,585,115)
Net real estate	5,643,853	5,723,475
Cash and cash equivalents	162,286	36,858
Restricted cash	36,103	35,737
Other assets	441,527	351,541
Assets held for sale	0	42,393
Total assets	6,283,769	6,190,004
LIABILITIES AND EQUITY
Non-recourse property debt, net	3,859,023	3,915,305
Revolving credit facility borrowings	70,000	160,360
Total indebtedness	3,929,023	4,075,665
Accrued liabilities and other	293,279	226,230
Liabilities related to assets held for sale	0	23,177
Total liabilities	4,222,302	4,325,072
Preferred noncontrolling interests/Redeemable Preferred Units	101,195	101,291
Commitments and contingencies (Note 5)
Equity/Partners' Capital:
Preferred units	125,000	125,000
General Partner and Special Limited Partner	1,758,636	1,574,419
Limited Partners	79,493	67,189
Partners’ capital attributable to the Aimco Operating Partnership	1,963,129	1,766,608
Partners' Capital Attributable to Noncontrolling Interest	(2,857)	(2,967)
Total partners’ capital	1,960,272	1,763,641
Total liabilities and equity	$ 6,283,769	$ 6,190,004