Operating Segments (Reconciliation Of Reportable Segments Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 162,721	$ 147,944	$ 463,695	$ 455,010
South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	66,079	56,636	184,338	163,270
International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	46,240	41,514	136,447	131,704
Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	50,402	49,794	142,910	160,036
Reportable Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	179,322	162,362	508,558	492,782
Reportable Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	73,508	63,967	204,093	181,397
Reportable Segment [Member] | International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	46,240	41,514	136,447	131,704
Reportable Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	59,574	56,881	168,018	179,681
Inter-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	(16,601)	(14,418)	(44,863)	(37,772)
Inter-Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	(7,429)	(7,331)	(19,755)	(18,127)
Inter-Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ (9,172)	$ (7,087)	$ (25,108)	$ (19,645)