Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Buildings and improvements	$ 6,304,829	$ 6,259,318
Land	1,883,128us-gaap_Land	1,885,640us-gaap_Land
Total real estate	8,187,957	8,144,958
Less accumulated depreciation	(2,703,934)	(2,672,179)
Net real estate ($354,609 and $360,160 related to VIEs)	5,484,023us-gaap_RealEstateInvestmentPropertyNet	5,472,779us-gaap_RealEstateInvestmentPropertyNet
Cash and cash equivalents ($18,112 and $17,108 related to VIEs)	164,490	28,971
Restricted cash ($34,867 and $36,196 related to VIEs)	95,428	91,445
Other assets ($182,156 and $182,108 related to VIEs)	465,332us-gaap_OtherAssets	476,727us-gaap_OtherAssets
Assets held for sale	6,180	27,106
Total assets	6,215,453us-gaap_Assets	6,097,028us-gaap_Assets
LIABILITIES AND EQUITY
Non-recourse property debt ($335,109 and $336,471 related to VIEs)	3,888,284us-gaap_SecuredDebt	4,022,809us-gaap_SecuredDebt
Revolving credit facility borrowings	0us-gaap_LineOfCredit	112,330us-gaap_LineOfCredit
Total indebtedness	3,888,284us-gaap_LongTermDebt	4,135,139us-gaap_LongTermDebt
Accounts payable	50,860	41,919
Accrued liabilities and other ($141,762 and $135,644 related to VIEs)	270,204	279,077
Deferred income	76,682us-gaap_DeferredRevenue	81,882us-gaap_DeferredRevenue
Liabilities related to assets held for sale	6,855	28,969
Total liabilities	4,292,885us-gaap_Liabilities	4,566,986us-gaap_Liabilities
Redeemable preferred interests in Aimco Operating Partnership	87,942	87,937
Commitments and contingencies (Note 6)
Equity/Partners' Capital:
Perpetual Preferred Stock	159,126us-gaap_PreferredStockValue	186,126us-gaap_PreferredStockValue
Common Stock, $0.01 par value, 500,787,260 shares authorized, 156,278,378 and 146,403,274 shares issued/outstanding at March 31, 2015 and December 31, 2014, respectively	1,563us-gaap_CommonStockValue	1,464us-gaap_CommonStockValue
Additional paid-in capital	4,065,411us-gaap_AdditionalPaidInCapital	3,696,143us-gaap_AdditionalPaidInCapital
Accumulated other comprehensive loss	(7,009)	(6,456)
Distributions in excess of earnings	(2,603,564)	(2,649,542)
Total Aimco equity	1,615,527us-gaap_StockholdersEquity	1,227,735us-gaap_StockholdersEquity
Noncontrolling interests in consolidated real estate partnerships	235,750	233,296
Common noncontrolling interests in Aimco Operating Partnership	(16,651)	(18,926)
Total equity	1,834,626	1,442,105
Total liabilities and equity/partners' capital	6,215,453	6,097,028
AIMCO PROPERTIES, L.P [Member]
ASSETS
Buildings and improvements	6,304,829	6,259,318
Land	1,883,128	1,885,640
Total real estate	8,187,957	8,144,958
Less accumulated depreciation	(2,703,934)	(2,672,179)
Net real estate ($354,609 and $360,160 related to VIEs)	5,484,023	5,472,779
Cash and cash equivalents ($18,112 and $17,108 related to VIEs)	164,490	28,971
Restricted cash ($34,867 and $36,196 related to VIEs)	95,428	91,445
Other assets ($182,156 and $182,108 related to VIEs)	465,332	476,727
Assets held for sale	6,180	27,106
Total assets	6,215,453	6,097,028
LIABILITIES AND EQUITY
Non-recourse property debt ($335,109 and $336,471 related to VIEs)	3,888,284	4,022,809
Revolving credit facility borrowings	0	112,330
Total indebtedness	3,888,284	4,135,139
Accounts payable	50,860	41,919
Accrued liabilities and other ($141,762 and $135,644 related to VIEs)	270,204	279,077
Deferred income	76,682	81,882
Liabilities related to assets held for sale	6,855	28,969
Total liabilities	4,292,885	4,566,986
Redeemable preferred interests in Aimco Operating Partnership	87,942	87,937
Commitments and contingencies (Note 6)
Equity/Partners' Capital:
Preferred units	159,126	186,126
General Partner and Special Limited Partner	1,456,401	1,041,609
Limited Partners	(16,651)	(18,926)
Partners’ capital attributable to the Aimco Operating Partnership	1,598,876	1,208,809
Noncontrolling interests in consolidated real estate partnerships	235,750	233,296
Total partners’ capital	1,834,626	1,442,105
Total liabilities and equity/partners' capital	$ 6,215,453	$ 6,097,028

The value of the general partner's and special limited partner's ownership interest.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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