Treasury Stock	3 Months Ended
Mar. 31, 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 was most recently expanded in 2013 to allow for the repurchase of up to $150.0 million of shares of Actua's Common Stock. During the three months ended March 31, 2016, Actua repurchased 470,000 shares of its Common Stock at an average stock price of $9.15 per share. During the three months ended March 31, 2016, Actua paid $4.0 million related to the repurchase and due to the timing of payments, the remaining $0.3 million was accrued. During the three months ended March 31, 2015, Actua repurchased 96,277 shares of its Common Stock at an average 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. As of the date of this Report, Actua may repurchase an additional $85.2 million of its Common Stock under the program. 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 was most recently expanded in 2013 to allow for the repurchase of up to $150.0 million of shares of Actua's Common Stock. During the three months ended March 31, 2016, Actua repurchased 470,000 shares of its Common Stock at an average stock price of $9.15 per share. During the three months ended March 31, 2016, Actua paid $4.0 million related to the repurchase and due to the timing of payments, the remaining $0.3 million was accrued. During the three months ended March 31, 2015, Actua repurchased 96,277 shares of its Common Stock at an average 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. As of the date of this Report, Actua may repurchase an additional $85.2 million of its Common Stock under the program. 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.