Treasury Stock	9 Months Ended
Sep. 30, 2016
Equity [Abstract]
Treasury Stock	Treasury Stock Actua has been authorized pursuant to a share repurchase program to repurchase, from time to time, shares of Common Stock in open market transactions, including pursuant to trading plans meeting the requirements of Rule 10b5-1 under the Exchange Act or in privately negotiated transactions. The program was adopted in 2008 and expanded in 2013 to allow for the repurchase of up to $150.0 million of shares of Actua's Common Stock. Subsequent to the quarter ended September 30, 2016, the program was further expanded to allow for an additional $39.8 million of repurchases, increasing the total repurchase amount to $189.8 million, of which $125.0 million is available as of the date of this Report. Actua did not repurchase any shares during the three months ended September 30, 2016. During the nine months ended September 30, 2016, Actua repurchased 1,010,000 shares of its Common Stock, paying $9.5 million for the shares at an average stock price of $9.41 per share. Actua did not repurchase any shares during the three months ended September 30, 2015. During the nine months ended September 30, 2015, Actua repurchased 96,277 shares of its Common Stock, paying $1.7 million for the shares at an average stock price of $17.66 per share. Since commencement of the program, Actua has deployed a total of $64.8 million to repurchase a total of 6,997,849 shares of Common Stock for an average purchase price of $9.26 per share. Repurchases are reflected in the line item “Treasury stock, at cost” as a reduction of stockholders’ equity in Actua’s Consolidated Balance Sheets in the relevant period.

Treasury Stock

Actua has been authorized pursuant to a share repurchase program to repurchase, from time to time, shares of Common Stock in open market transactions, including pursuant to trading plans meeting the requirements of Rule 10b5-1 under the Exchange Act or in privately negotiated transactions. The program was adopted in 2008 and expanded in 2013 to allow for the repurchase of up to $150.0 million of shares of Actua's Common Stock. Subsequent to the quarter ended September 30, 2016, the program was further expanded to allow for an additional $39.8 million of repurchases, increasing the total repurchase amount to $189.8 million, of which $125.0 million is available as of the date of this Report. Actua did not repurchase any shares during the three months ended September 30, 2016. During the nine months ended September 30, 2016, Actua repurchased 1,010,000 shares of its Common Stock, paying $9.5 million for the shares at an average stock price of $9.41 per share. Actua did not repurchase any shares during the three months ended September 30, 2015. During the nine months ended September 30, 2015, Actua repurchased 96,277 shares of its Common Stock, paying $1.7 million for the shares at an average stock price of $17.66 per share. Since commencement of the program, Actua has deployed a total of $64.8 million to repurchase a total of 6,997,849 shares of Common Stock for an average purchase price of $9.26 per share. Repurchases are reflected in the line item “Treasury stock, at cost” as a reduction of stockholders’ equity in Actua’s Consolidated Balance Sheets in the relevant period.