Summary of Significant Accounting Policies and Practices Equity method investments (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 01, 2011	Nov. 01, 2011	Jun. 17, 2011	Sep. 30, 2010	Dec. 31, 2012 epay Malaysia [Member]	Dec. 31, 2011 epay Malaysia [Member]	Jan. 19, 2012 Euronet Middle East W.L.L. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							40.00%	40.00%
Business combination, step acquisition, equity interest in acquiree, percentage									49.00%
Equity method investments	$ 4,700,000	$ 7,500,000
Retained earnings, undistributed earnings from equity method investees	4,600,000	6,300,000
Business Acquisition, Percentage of Voting Interests Acquired									51.00%
Business Acquisition, Cost of Acquired Entity, Cash Paid			$ 18,300,000	$ 5,300,000	$ 3,400,000	$ 1,000,000			$ 6,400,000