Selected Quarterly Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
SELECTED QUARERLY DATA (UNAUDITED) [Abstract]
Revenues (quarterly)	$ 351,246	$ 316,356	$ 302,377	$ 297,622	$ 319,402	$ 299,507	$ 279,802	$ 262,593	$ 1,267,601	$ 1,161,304	$ 1,038,269
Operating income (loss) (quarterly)	(1,886)	24,195	19,854	15,842	22,998	20,122	18,800	17,217	58,005	79,137	5,269
Net income (loss), including portion attributable to noncontrolling interest (quarterly)	(12,768)	14,341	5,726	13,098	11,088	(2,925)	12,294	17,631	20,397	38,088	(37,917)
Net income (loss) attributable to Euronet Worldwide, Inc. (quarterly)	$ (13,014)	$ 14,630	$ 5,747	$ 13,172	$ 10,968	$ (3,180)	$ 11,889	$ 17,284	$ 20,535	$ 36,961	$ (38,372)
Earnings per share, basic (quarterly)	$ (0.26)	$ 0.29	$ 0.11	$ 0.26	$ 0.22	$ (0.06)	$ 0.23	$ 0.34	$ 0.41	$ 0.73	$ (0.75)
Earnings per share, diluted (quarterly)	$ (0.26)	$ 0.28	$ 0.11	$ 0.26	$ 0.21	$ (0.06)	$ 0.23	$ 0.33	$ 0.40	$ 0.71	$ (0.75)