Unaudited Quarterly Results (Schedule Of Unaudited Consolidated Statements Of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Unaudited Quarterly Results [Abstract]
Revenue	$ 149,194	$ 162,721	$ 148,416	$ 152,558	$ 155,056	$ 147,944	$ 151,433	$ 155,633	$ 612,889	$ 610,066	$ 590,749
Operating income	10,072	7,564	16,307	25,006	14,726	24,547	25,589	32,181	58,949	97,043	114,368
Net income attributable to Net1	$ 7,036	$ 3,009	$ 9,622	$ 19,483	$ 11,289	$ 18,392	$ 18,641	$ 24,632	$ 39,150	$ 72,954	$ 82,454
Basic earnings attributable to Net1 shareholders	$ 0.12	$ 0.05	$ 0.17	$ 0.34	$ 0.20	$ 0.34	$ 0.35	$ 0.46	$ 0.69	$ 1.34	$ 1.72
Diluted earnings attributable to Net1 shareholders	$ 0.12	$ 0.05	$ 0.17	$ 0.34	$ 0.20	$ 0.33	$ 0.35	$ 0.46	$ 0.69	$ 1.33	$ 1.71