Selected Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Selected Quarterly Data [Abstract]
Revenues (quarterly)	$ 649,385	$ 714,505	$ 622,224	$ 550,515	$ 604,645	$ 637,834	$ 536,563	$ 473,380	$ 2,536,629	$ 2,252,422	$ 1,958,615
Operating income (loss) (quarterly)	71,160	150,913	90,369	45,472	41,119	116,901	66,691	41,286	357,914	265,997	249,773
Net income (loss)	59,894	102,257	43,636	26,344	(22,829)	100,353	51,347	28,069	232,131	156,940	174,098
Net income attributable to Euronet Worldwide, Inc. (quarterly)	$ 59,991	$ 102,723	$ 43,724	$ 26,413	$ (22,933)	$ 100,290	$ 51,365	$ 28,123	$ 232,851	$ 156,845	$ 174,415
Earnings (loss) per share, basic (quarterly)	$ 1.16	$ 2.01	$ 0.85	$ 0.51	$ (0.44)	$ 1.91	$ 0.98	$ 0.54	$ 4.52	$ 2.99	$ 3.34
Earnings (loss) per share, diluted (quarterly)	$ 1.10	$ 1.89	$ 0.82	$ 0.49	$ (0.44)	$ 1.80	$ 0.93	$ 0.51	$ 4.26	$ 2.85	$ 3.23