Earnings Per Share (Income From Continuing Operations And Share Data Used In Basic And Diluted Earnings Per Share Computations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Earnings Per Share [Abstract]
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
Undistributed earnings									$ 39,150	$ 72,954	$ 82,454
Percent allocated to common shareholders									98.00%	99.00%	99.00%
Numerator for earnings per share: basic and diluted									$ 38,497	$ 72,188	$ 81,370
Denominator for basic earnings per share: weighted-average common shares outstanding									55,860	53,966	47,234
Effect of dilutive securities: Stock options									51	109	242
Denominator for diluted earnings per share: adjusted weighted average common shares outstanding and assumed conversion									55,911	54,075	47,476
Earnings per share: Basic	$ 0.12	$ 0.05	$ 0.17	$ 0.34	$ 0.20	$ 0.34	$ 0.35	$ 0.46	$ 0.69	$ 1.34	$ 1.72
Earnings per share: Diluted	$ 0.12	$ 0.05	$ 0.17	$ 0.34	$ 0.20	$ 0.33	$ 0.35	$ 0.46	$ 0.69	$ 1.33	$ 1.71
Basic weighted-average common shares outstanding (A)									55,860	53,966	47,234
Basic weighted-average common shares outstanding and unvested restricted shares expected to vest (B)									56,807	54,539	47,863