Aimco Equity	12 Months Ended
Dec. 31, 2019
Equity [Abstract]
Aimco Equity	Note 7 — Aimco Equity Preferred Stock During the year ended December 31, 2019, Aimco redeemed all of the outstanding shares of its 6.88% Class A Cumulative Preferred Stock. Aimco’s Class A Preferred Stock had a $0.01 per share par value, was senior to Aimco’s Common Stock, had a liquidation preference per share of $25.00. In connection with the redemption of Aimco preferred stock, the Aimco Operating Partnership redeemed from Aimco a number of Preferred Partnership Units equal to the number of shares redeemed by Aimco. Common Stock During the years ended December 31, 2019, 2018, and 2017, Aimco declared dividends per common share of $1.56, $1.52 and $1.44, respectively. On February 3, 2019, Aimco’s Board of Directors authorized a reverse stock split, in which every 1.03119 Aimco common share was combined into one Aimco common share, effective at the close of business on February 20, 2019. On the same date, the Board of Directors also declared a special dividend on the Aimco Common Stock that consisted of $67.1 million in cash, 4.5 million shares of Aimco Common Stock, and $0.4 million of cash paid in lieu of issuing fractional units. We paid the special dividend on March 22, 2019, to stockholders of record as of February 22, 2019. The special dividend amount included the regular quarterly cash dividend of $0.39 per share. Stockholders had the opportunity to elect to receive the special dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. Aimco’s Board of Directors also authorized a reverse stock split intended to neutralize the dilutive impact of the stock issued in the special dividend. As a result, the total number of shares outstanding after the stock dividend and reverse split was unchanged from the number of shares outstanding immediately prior to the two actions. All equity and earnings per share data, including the number of shares outstanding, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Annual Report on Form 10-K. Change to our charter On February 24, 2020, pursuant to Maryland law and our charter, our Board of Directors reclassified into Common Stock, all of the authorized and unissued shares of each of the following classes of preferred stock: Class Z Cumulative Preferred Stock, Class A Cumulative Preferred Stock, and Series A Community Reinvestment Act Preferred Stock. The reclassification increases the number of authorized shares classified as Common Stock by 9,800,240 shares, from 500,787,260 shares immediately prior to the reclassification to 510,587,500 shares immediately after the reclassification. The reclassification does not impact any of our issued and outstanding shares of preferred stock. Registration Statements Aimco and the Aimco Operating Partnership have a shelf registration statement that provides for the issuance of equity and debt securities by Aimco and debt securities by the Aimco Operating Partnership.

Aimco Equity

12 Months Ended

Dec. 31, 2019

Note 7 — Aimco Equity

Preferred Stock

During the year ended December 31, 2019, Aimco redeemed all of the outstanding shares of its 6.88% Class A Cumulative Preferred Stock. Aimco’s Class A Preferred Stock had a $0.01 per share par value, was senior to Aimco’s Common Stock, had a liquidation preference per share of $25.00.

In connection with the redemption of Aimco preferred stock, the Aimco Operating Partnership redeemed from Aimco a number of Preferred Partnership Units equal to the number of shares redeemed by Aimco.

Common Stock

During the years ended December 31, 2019, 2018, and 2017, Aimco declared dividends per common share of $1.56, $1.52 and $1.44, respectively.

On February 3, 2019, Aimco’s Board of Directors authorized a reverse stock split, in which every 1.03119 Aimco common share was combined into one Aimco common share, effective at the close of business on February 20, 2019. On the same date, the Board of Directors also declared a special dividend on the Aimco Common Stock that consisted of $67.1 million in cash, 4.5 million shares of Aimco Common Stock, and $0.4 million of cash paid in lieu of issuing fractional units. We paid the special dividend on March 22, 2019, to stockholders of record as of February 22, 2019. The special dividend amount included the regular quarterly cash dividend of $0.39 per share.

Stockholders had the opportunity to elect to receive the special dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. Aimco’s Board of Directors also authorized a reverse stock split intended to neutralize the dilutive impact of the stock issued in the special dividend. As a result, the total number of shares outstanding after the stock dividend and reverse split was unchanged from the number of shares outstanding immediately prior to the two actions. All equity and earnings per share data, including the number of shares outstanding, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Annual Report on Form 10-K.

Change to our charter

On February 24, 2020, pursuant to Maryland law and our charter, our Board of Directors reclassified into Common Stock, all of the authorized and unissued shares of each of the following classes of preferred stock: Class Z Cumulative Preferred Stock, Class A Cumulative Preferred Stock, and Series A Community Reinvestment Act Preferred Stock. The reclassification increases the number of authorized shares classified as Common Stock by 9,800,240 shares, from 500,787,260 shares immediately prior to the reclassification to 510,587,500 shares immediately after the reclassification. The reclassification does not impact any of our issued and outstanding shares of preferred stock.

Registration Statements

Aimco and the Aimco Operating Partnership have a shelf registration statement that provides for the issuance of equity and debt securities by Aimco and debt securities by the Aimco Operating Partnership.