Organization	9 Months Ended
Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	NOTE 1 — Organization Apartment Investment and Management Company, or Aimco, is a Maryland corporation incorporated on January 10, 1994. Aimco is a self-administered and self-managed real estate investment trust, or REIT. AIMCO Properties, L.P., or the Aimco Operating Partnership, is a Delaware limited partnership formed on May 16, 1994, to conduct our business, which is focused on the ownership, management and redevelopment of quality apartment communities located in the largest coastal and job growth markets of the United States. Aimco, and through its wholly-owned subsidiaries, AIMCO-GP, Inc. and AIMCO-LP Trust, owns a majority of the ownership interests in the Aimco Operating Partnership. Aimco conducts all of its business and owns all of its assets through the Aimco Operating Partnership. Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are referred to as “OP Units.” OP Units include common partnership units, high performance partnership units and partnership preferred units, which we refer to as common OP Units, HPUs and preferred OP Units, respectively. We also refer to HPUs as common OP Unit equivalents. At September 30, 2013, after eliminations for units held by consolidated entities, the Aimco Operating Partnership had 153,859,506 common partnership units and equivalents outstanding. At September 30, 2013, Aimco owned 145,916,439 of the common partnership units (94.8% of the common partnership units and equivalents) of the Aimco Operating Partnership and Aimco had outstanding an equal number of shares of its Class A Common Stock, which we refer to as Common Stock. Except as the context otherwise requires, “we,” “our” and “us” refer to Aimco, the Aimco Operating Partnership and their consolidated subsidiaries, collectively. As of September 30, 2013, we owned an equity interest in 173 conventional real estate properties with 54,094 apartment homes and 79 affordable real estate properties with 10,891 apartment homes. Of these properties, we consolidated 169 conventional properties with 53,952 apartment homes and 63 affordable properties with 9,777 apartment homes. These conventional and affordable properties generated 90% and 10%, respectively, of our proportionate property net operating income (as defined in Note 10) during the nine months ended September 30, 2013.

NOTE 1 — Organization

Apartment Investment and Management Company, or Aimco, is a Maryland corporation incorporated on January 10, 1994. Aimco is a self-administered and self-managed real estate investment trust, or REIT. AIMCO Properties, L.P., or the Aimco Operating Partnership, is a Delaware limited partnership formed on May 16, 1994, to conduct our business, which is focused on the ownership, management and redevelopment of quality apartment communities located in the largest coastal and job growth markets of the United States.

Aimco, and through its wholly-owned subsidiaries, AIMCO-GP, Inc. and AIMCO-LP Trust, owns a majority of the ownership interests in the Aimco Operating Partnership. Aimco conducts all of its business and owns all of its assets through the Aimco Operating Partnership. Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are referred to as “OP Units.” OP Units include common partnership units, high performance partnership units and partnership preferred units, which we refer to as common OP Units, HPUs and preferred OP Units, respectively. We also refer to HPUs as common OP Unit equivalents. At September 30, 2013, after eliminations for units held by consolidated entities, the Aimco Operating Partnership had 153,859,506 common partnership units and equivalents outstanding. At September 30, 2013, Aimco owned 145,916,439 of the common partnership units (94.8% of the common partnership units and equivalents) of the Aimco Operating Partnership and Aimco had outstanding an equal number of shares of its Class A Common Stock, which we refer to as Common Stock.

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

As of September 30, 2013, we owned an equity interest in 173 conventional real estate properties with 54,094 apartment homes and 79 affordable real estate properties with 10,891 apartment homes. Of these properties, we consolidated 169 conventional properties with 53,952 apartment homes and 63 affordable properties with 9,777 apartment homes. These conventional and affordable properties generated 90% and 10%, respectively, of our proportionate property net operating income (as defined in Note 10) during the nine months ended September 30, 2013.