Limited liability company (LLC) or limited partnership (LP), managing member or general partner, economic interest.

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- Definition

Operating partnership common units outstanding.

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Organization

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Percentage of average ownership of portfolio.

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Separate entity as percentage of portfolio NAV.

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The number of general partner units outstanding.

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Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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- Definition

The number of real estate properties owned as of the balance sheet date.

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The number of units in a real estate property owned as of the balance sheet date.

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- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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Date the restructuring activities were initiated or are expected to be initiated, in CCYY-MM-DD format.

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Organization (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
Organization (Details Textual) $ in Thousands	Sep. 30, 2020 USD ($) Property apartment_home Multi_family_apartment shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Property apartment_home Multi_family_apartment shares	Sep. 30, 2019 USD ($)
Organization [Line Items]
Other expenses, net \| $	$ 17,571	$ 4,002	$ 23,452	$ 12,759
Separation Costs [Member]
Organization [Line Items]
Other expenses, net \| $	$ 11,900		$ 12,600
Partially Owned Properties [Member]
Organization [Line Items]
Number of apartment communities \| Property	126		126
Number of apartment homes in apartment communities \| apartment_home	33,209		33,209
Percentage of average ownership of portfolio	95.00%		95.00%
Wholly And Partially Owned Consolidated Properties [Member]
Organization [Line Items]
Number of apartment communities \| Property	122		122
Number of apartment homes in apartment communities \| apartment_home	33,067		33,067
Aimco Post Separation [Member]
Organization [Line Items]
Number of apartment communities \| Property	25		25
Separate entity as percentage of portfolio NAV			10.00%
AIMCO PROPERTIES, L.P [Member]
Organization [Line Items]
Common operating partnership units and equivalents outstanding \| shares	159,182,513		159,182,513
Common operating partnership units and equivalents outstanding \| shares	148,865,947		148,865,947
Percentage of the Aimco Operating Partnership's common partnership units and equivalents owned by Aimco			93.50%
Percentage of economic interest			94.90%
Apartment Income REIT [Member]
Organization [Line Items]
Separations beginning date			Sep. 14, 2020
Separate entity as percentage of portfolio NAV			90.00%
Apartment Income REIT [Member] \| Aimco Post Separation [Member] \| Multi-Family Communities Securing Note Payable [Member]
Organization [Line Items]
Number of apartment communities \| Multi_family_apartment	16		16
Apartment Income REIT [Member] \| Aimco Post Separation [Member] \| Note Payable Secured by Multi-Family Communities [Member]
Organization [Line Items]
Notes payable \| $	$ 534,000		$ 534,000