Operating Segments (Reconciliation Of Reportable Segments Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	$ 86,484	$ 162,721	[2]	$ 309,518	$ 463,695	[2]
South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		16,074	66,079		71,340	184,338
International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		34,358	46,240		111,869	136,447
Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		36,052	50,402		126,309	142,910
Reportable Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		88,382	179,322		317,573	508,558
Reportable Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		17,374	73,508		77,093	204,093
Reportable Segment [Member] | International Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		34,358	46,240		111,869	136,447
Reportable Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		36,650	59,574		128,611	168,018
Inter-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		(1,898)	(16,601)		(8,055)	(44,863)
Inter-Segment [Member] | South African Transaction Processing [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		(1,300)	(7,429)		(5,753)	(19,755)
Inter-Segment [Member] | Financial Inclusion And Applied Technologies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		$ (598)	$ (9,172)		$ (2,302)	$ (25,108)

[1] Refer to Note 2 for discontinued operations disclosures.

[2] Refer to Note 1