Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Buildings and improvements	$ 6,259,318	$ 6,332,723
Land	1,885,640us-gaap_Land	1,881,358us-gaap_Land
Total real estate	8,144,958	8,214,081
Less accumulated depreciation	(2,672,179)	(2,822,872)
Net real estate ($360,160 and $392,245 related to VIEs)	5,472,779us-gaap_RealEstateInvestmentPropertyNet	5,391,209us-gaap_RealEstateInvestmentPropertyNet
Cash and cash equivalents ($17,108 and $24,094 related to VIEs)	28,971	55,751
Restricted cash ($36,196 and $36,369 related to VIEs)	91,445	127,037
Other assets ($182,108 and $211,287 related to VIEs)	476,727us-gaap_OtherAssets	505,416us-gaap_OtherAssets
Assets held for sale	27,106	0
Total assets	6,097,028us-gaap_Assets	6,079,413us-gaap_Assets
LIABILITIES AND EQUITY
Non-recourse property debt ($336,471 and $355,372 related to VIEs)	4,022,809us-gaap_SecuredDebt	4,337,785us-gaap_SecuredDebt
Revolving credit facility borrowings	112,330us-gaap_LineOfCredit	50,400us-gaap_LineOfCredit
Total indebtedness	4,135,139us-gaap_LongTermDebt	4,388,185us-gaap_LongTermDebt
Accounts payable	41,919	43,161
Accrued liabilities and other ($135,644 and $140,910 related to VIEs)	279,077	287,595
Deferred income	81,882us-gaap_DeferredRevenue	107,775us-gaap_DeferredRevenue
Liabilities related to assets held for sale	28,969	0
Total liabilities	4,566,986us-gaap_Liabilities	4,826,716us-gaap_Liabilities
Preferred noncontrolling interests/Redeemable Preferred Units	87,937	79,953
Commitments and contingencies (Note 7)	0us-gaap_CommitmentsAndContingencies	0us-gaap_CommitmentsAndContingencies
Equity:
Perpetual Preferred Stock (Note 9)	186,126us-gaap_PreferredStockValue	68,114us-gaap_PreferredStockValue
Common Stock, $0.01 par value, 500,787,260 and 505,787,260 shares authorized, 146,403,274 and 145,917,387 shares issued/outstanding at December 31, 2014 and 2013, respectively	1,464us-gaap_CommonStockValue	1,459us-gaap_CommonStockValue
Additional paid-in capital	3,696,143us-gaap_AdditionalPaidInCapital	3,701,339us-gaap_AdditionalPaidInCapital
Accumulated other comprehensive loss	(6,456)	(4,602)
Distributions in excess of earnings	(2,649,542)	(2,798,853)
Total Aimco equity	1,227,735us-gaap_StockholdersEquity	967,457us-gaap_StockholdersEquity
Noncontrolling interests in consolidated real estate partnerships	233,296	233,008
Common noncontrolling interests in Aimco Operating Partnership	(18,926)	(27,721)
Total equity	1,442,105	1,172,744
Total liabilities and equity	6,097,028	6,079,413
AIMCO PROPERTIES, L.P.
ASSETS
Buildings and improvements	6,259,318	6,332,723
Land	1,885,640	1,881,358
Total real estate	8,144,958	8,214,081
Less accumulated depreciation	(2,672,179)	(2,822,872)
Net real estate ($360,160 and $392,245 related to VIEs)	5,472,779	5,391,209
Cash and cash equivalents ($17,108 and $24,094 related to VIEs)	28,971	55,751
Restricted cash ($36,196 and $36,369 related to VIEs)	91,445	127,037
Other assets ($182,108 and $211,287 related to VIEs)	476,727	505,416
Assets held for sale	27,106	0
Total assets	6,097,028	6,079,413
LIABILITIES AND EQUITY
Non-recourse property debt ($336,471 and $355,372 related to VIEs)	4,022,809	4,337,785
Revolving credit facility borrowings	112,330	50,400
Total indebtedness	4,135,139	4,388,185
Accounts payable	41,919	43,161
Accrued liabilities and other ($135,644 and $140,910 related to VIEs)	279,077	287,595
Deferred income	81,882	107,775
Liabilities related to assets held for sale	28,969	0
Total liabilities	4,566,986	4,826,716
Preferred noncontrolling interests/Redeemable Preferred Units	87,937	79,953
Commitments and contingencies (Note 7)	0	0
Equity:
Preferred units (Note 10)	186,126	68,114
General Partner and Special Limited Partner	1,041,609	899,343
Limited Partners	(18,926)	(27,721)
Partners’ capital attributable to the Aimco Operating Partnership	1,208,809	939,736
Noncontrolling interests in consolidated real estate partnerships	233,296	233,008
Total partners’ capital	1,442,105	1,172,744
Total liabilities and equity	$ 6,097,028	$ 6,079,413

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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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Amount of obligations incurred and payable, pertaining to costs that are statutory in nature, incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include, but not limited to, taxes, interest, rent and utilities. Also includes the aggregate carrying amount of liabilities not separately disclosed.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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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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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

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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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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.

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The amount of the limited partners' ownership interests.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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