Operating Segments (Reconciliation Of Reportable Segments Revenue) (Details) - USD ($) $ 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
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 149,194	$ 162,721	$ 148,416	$ 152,558	$ 155,056	$ 147,944	$ 151,433	$ 155,633	$ 612,889	$ 610,066	$ 590,749
South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									238,098	224,626	194,959
International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									180,027	176,729	169,807
Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									194,764	208,711	225,983
Reportable Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									669,980	661,774	631,784
Reportable Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									268,047	249,144	212,574
Reportable Segment [Member] | International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									180,027	176,729	169,807
Reportable Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									221,906	235,901	249,403
Inter-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									(57,091)	(51,708)	(41,035)
Inter-Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									(29,949)	(24,518)	(17,615)
Inter-Segment [Member] | International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues
Inter-Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									$ (27,142)	$ (27,190)	$ (23,420)