Organization	12 Months Ended
Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	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, 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 partnership unit equivalents. At December 31, 2012, after eliminations for units held by consolidated subsidiaries, the Aimco Operating Partnership had 153,569,090 common partnership units and equivalents outstanding. At December 31, 2012, Aimco owned 145,563,903 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 December 31, 2012, we owned an equity interest in 175 conventional real estate properties with 55,879 units and 90 affordable real estate properties with 12,098 units. Of these properties, we consolidated 171 conventional properties with 55,737 units and 72 affordable properties with 10,370 units. These conventional and affordable properties generated 90% and 10%, respectively, of our proportionate property net operating income (as defined in Note 19) during the year ended December 31, 2012.

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, 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 partnership unit equivalents. At December 31, 2012, after eliminations for units held by consolidated subsidiaries, the Aimco Operating Partnership had 153,569,090 common partnership units and equivalents outstanding. At December 31, 2012, Aimco owned 145,563,903 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 December 31, 2012, we owned an equity interest in 175 conventional real estate properties with 55,879 units and 90 affordable real estate properties with 12,098 units. Of these properties, we consolidated 171 conventional properties with 55,737 units and 72 affordable properties with 10,370 units. These conventional and affordable properties generated 90% and 10%, respectively, of our proportionate property net operating income (as defined in Note 19) during the year ended December 31, 2012.