Partners' Capital - Classes of Preferred OP Units (Details) - AIMCO PROPERTIES, L.P. [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Limited Partners Capital Account [Line Items]
Units issued (in shares)	2,938,802	3,643,399
Units outstanding (in shares)	2,938,802	3,643,399
Redemption values	$ 79,449	$ 97,064
Class One [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	8.75%
Distributions per annum (in dollars per share)	$ 8.00
Units issued (in shares)	90,000	90,000
Units outstanding (in shares)	90,000	90,000
Redemption values	$ 8,229	$ 8,229
Class Two [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	1.92%
Distributions per annum (in dollars per share)	$ 0.48
Units issued (in shares)	11,122	11,122
Units outstanding (in shares)	11,122	11,122
Redemption values	$ 278	$ 278
Class Three [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	7.88%
Distributions per annum (in dollars per share)	$ 1.97
Units issued (in shares)	1,313,927	1,338,524
Units outstanding (in shares)	1,313,927	1,338,524
Redemption values	$ 32,848	$ 33,463
Class Four [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	8.00%
Distributions per annum (in dollars per share)	$ 2.00
Units issued (in shares)	644,954	644,954
Units outstanding (in shares)	644,954	644,954
Redemption values	$ 16,124	$ 16,124
Class Six [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	8.50%
Distributions per annum (in dollars per share)	$ 2.13
Units issued (in shares)	773,693	773,693
Units outstanding (in shares)	773,693	773,693
Redemption values	$ 19,342	$ 19,342
Class Seven [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	7.87%
Distributions per annum (in dollars per share)	$ 1.97
Units issued (in shares)	26,150	26,150
Units outstanding (in shares)	26,150	26,150
Redemption values	$ 654	$ 654
Class Nine [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	6.00%
Distributions per annum (in dollars per share)	$ 1.50
Units issued (in shares)	78,956	78,956
Units outstanding (in shares)	78,956	78,956
Redemption values	$ 1,974	$ 1,974
Class Ten [Member]
Limited Partners Capital Account [Line Items]
Distributions per annum	6.00%
Distributions per annum (in dollars per share)	$ 1.50
Units issued (in shares)		680,000
Units outstanding (in shares)		680,000
Redemption values		$ 17,000

Temporary Equity, Distribution Made to Member or Limited Partner, Distributions Paid, Percentage

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- Definition

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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No definition available.

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- Definition

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.27(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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