Basis of Presentation and Organization (Details Textual)	6 Months Ended
	Jun. 30, 2021 Property1 Property Land ApartmentHome shares
Organization [Line Items]
Number of leased properties | Property1	4
Number of vacant land parcel | Land	1
Partially Owned Properties [Member]
Organization [Line Items]
Number of apartment homes | Property	96
Number of apartment homes in apartment communities | ApartmentHome	26,422
Percentage of average ownership of portfolio	93.00%
AIR Operating Partnership [Member]
Organization [Line Items]
Common operating partnership units and equivalents outstanding	168,220,639
Common operating partnership units and equivalents outstanding	156,856,952
Percentage of the Aimco Operating Partnership's common partnership units and equivalents owned by Aimco	93.20%
Percentage of economic interest	95.00%