Commitments and Contingencies Loss Contingencies (Details)	3 Months Ended	1 Months Ended			3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	13 Months Ended	3 Months Ended
	Mar. 31, 2013 Users	Jun. 30, 2008 June 2008, Paris France, Court of Commerce Ruling EUR (€)	Sep. 30, 2010 September 2010, Paris France, Court Of Appeal Ruling EUR (€)	Nov. 30, 2009 November 2009, Paris France, Court of Commerce Ruling EUR (€)	Mar. 31, 2013 September 2009, Seoul Korea District Court, Trial USD ($)	Mar. 31, 2013 January 2010, Seoul Korea High Court Users	Sep. 30, 2012 September 2012, Seoul Korea High Court lawsuits Plaintiffs	Mar. 31, 2014 January 2013, Seoul High Court Plaintiffs Users	Jan. 28, 2013 January 2013, Seoul Western District Court Plaintiffs lawsuits	Jan. 31, 2014 January 2013, Seoul Western District Court lawsuits	Mar. 31, 2014 Litigation in Appeal January 2013, Seoul High Court Users Plaintiffs	Mar. 31, 2014 Litigation in Appeal Korean Supreme Court Users
Litigation and Other Legal Matters
Damages awarded		€ 38,600,000	€ 5,700,000	€ 1,700,000
Daily fines, enforceable		100,000		2,500
Approximate number of users, Korean Subsidiary IAC	20,000,000
Approximate number of users sueing Korean Subsidiary IAC	149,000					34,000	55	33,795	2,291		33,215
Number of representative suits in trial							3	18	2	2,284	10
Number of users with cases in review												33,218
Consolation money per user, Korean Court precedent					$ 200