Organization	3 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	Note 1 — Organization Apartment Investment and Management Company (“Aimco”), a Maryland corporation incorporated on January 10, 1994, is a self-administered and self-managed real estate investment trust (“REIT”). Aimco, through a wholly-owned subsidiary, is the general and special limited partner of Aimco OP L.P. (“Aimco Operating Partnership”). Except as the context otherwise requires, “we,” “our,” and “us” refer to Aimco, Aimco Operating Partnership, and their consolidated subsidiaries, collectively. The Separation On December 15, 2020, Aimco completed the separation of its businesses (the “Separation”), creating two, separate and distinct, publicly traded companies, Aimco and Apartment Income REIT Corp. (“AIR”) (Aimco and AIR together, as they existed prior to the Separation, “Aimco Predecessor”). Prior to the Separation, the condensed consolidated financial statements were prepared on a carve-out basis and reflect significant assumptions and allocations. The condensed consolidated financial statements reflect our historical consolidated financial position, results of operations, and cash flows in conformity with U.S. GAAP. The historical financial statements of Aimco do not represent the financial position and results of operations of one legal entity, but rather a combination of entities under common control that have been “carved out” from Aimco Predecessor’s financial statements. All significant intercompany balances have been eliminated in consolidation. All separation related transactions between Aimco and Aimco Predecessor are considered effectively settled through partners’ capital in our condensed consolidated financial statements, other than the Notes Payable to AIR as discussed in Note 3. The settlement of these transactions is reflected as contributions from Aimco Predecessor, net in our condensed consolidated statements of equity and partners’ capital and net change in Aimco Predecessor investment in our condensed consolidated statements of cash flows as financing activities. Business As of March 31, 2021, Aimco owned approximately 93.3% of the legal interest in the common partnership units of Aimco Operating Partnership and 94.9% of the economic interest in Aimco Operating Partnership. The remaining 6.7% legal interest is owned by limited partners. As the sole general partner of Aimco Operating Partnership, Aimco has exclusive control of Aimco Operating Partnership’s day-to-day management. We own or lease a portfolio of real estate investments focused primarily on the U.S. multifamily sector. These real estate investments include a portfolio of 24 operating apartment communities with 6,067 apartment homes, diversified by both geography and price point, in 12 states; one commercial office building owned as part of a land assemblage; two residential apartment communities, with 1,055 planned apartment homes, and one hotel, with 106 planned rooms, that we are actively developing and redeveloping; one residential apartment community, currently with 275 apartment homes, in redevelopment planning; and three residential apartment communities, with 499 apartment homes, for which we have completed the redevelopment and are in lease-up, but have not achieved stabilization.

Organization

3 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1 — Organization

Apartment Investment and Management Company (“Aimco”), a Maryland corporation incorporated on January 10, 1994, is a self-administered and self-managed real estate investment trust (“REIT”). Aimco, through a wholly-owned subsidiary, is the general and special limited partner of Aimco OP L.P. (“Aimco Operating Partnership”).

Except as the context otherwise requires, “we,” “our,” and “us” refer to Aimco, Aimco Operating Partnership, and their consolidated subsidiaries, collectively.

The Separation

On December 15, 2020, Aimco completed the separation of its businesses (the “Separation”), creating two, separate and distinct, publicly traded companies, Aimco and Apartment Income REIT Corp. (“AIR”) (Aimco and AIR together, as they existed prior to the Separation, “Aimco Predecessor”).

Prior to the Separation, the condensed consolidated financial statements were prepared on a carve-out basis and reflect significant assumptions and allocations. The condensed consolidated financial statements reflect our historical consolidated financial position, results of operations, and cash flows in conformity with U.S. GAAP. The historical financial statements of Aimco do not represent the financial position and results of operations of one legal entity, but rather a combination of entities under common control that have been “carved out” from Aimco Predecessor’s financial statements. All significant intercompany balances have been eliminated in consolidation.

All separation related transactions between Aimco and Aimco Predecessor are considered effectively settled through partners’ capital in our condensed consolidated financial statements, other than the Notes Payable to AIR as discussed in Note 3. The settlement of these transactions is reflected as contributions from Aimco Predecessor, net in our condensed consolidated statements of equity and partners’ capital and net change in Aimco Predecessor investment in our condensed consolidated statements of cash flows as financing activities.

Business

As of March 31, 2021, Aimco owned approximately 93.3% of the legal interest in the common partnership units of Aimco Operating Partnership and 94.9% of the economic interest in Aimco Operating Partnership. The remaining 6.7% legal interest is owned by limited partners. As the sole general partner of Aimco Operating Partnership, Aimco has exclusive control of Aimco Operating Partnership’s day-to-day management.

We own or lease a portfolio of real estate investments focused primarily on the U.S. multifamily sector. These real estate investments include a portfolio of 24 operating apartment communities with 6,067 apartment homes, diversified by both geography and price point, in 12 states; one commercial office building owned as part of a land assemblage; two residential apartment communities, with 1,055 planned apartment homes, and one hotel, with 106 planned rooms, that we are actively developing and redeveloping; one residential apartment community, currently with 275 apartment homes, in redevelopment planning; and three residential apartment communities, with 499 apartment homes, for which we have completed the redevelopment and are in lease-up, but have not achieved stabilization.