Revenue Recognition (Revenue Disaggregated By Major Revenue Streams) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 74,080	$ 97,150	$ 154,836	$ 223,034
Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	74,080	77,442	154,836	184,539
South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	18,171	20,803	35,370	55,266
International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	34,363	38,124	68,380	77,511
Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	21,546	18,515	51,086	51,762
Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,035	19,031	33,001	49,260
Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	32,851	36,925	65,247	74,169
Welfare Benefit Distribution [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,136			3,086
Welfare Benefit Distribution [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,512
Telecom Products And Services [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,639	3,027	15,933	7,943
Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,103	3,140	8,363	13,745
Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,384	5,969	10,538	15,946
Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,042	4,913	12,176	9,941
Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,372	1,306	2,758	3,821
Other [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,772	2,369	2,920
Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,199	3,133	3,342
Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	6	160	1,318	366
South Africa [Member] | Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	39,717	39,318	86,456	107,028
South Africa [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	18,171	20,803	35,370	55,266
South Africa [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	66,330
South Africa [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	21,546	18,515	51,086
South Africa [Member] | Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,035	19,031	33,001	49,260
South Africa [Member] | Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		63,197
South Africa [Member] | Welfare Benefit Distribution [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,136			3,086
South Africa [Member] | Welfare Benefit Distribution [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Africa [Member] | Telecom Products And Services [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,639	3,027	15,933
South Africa [Member] | Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,103	3,140	8,363
South Africa [Member] | Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,384	5,969	10,538
South Africa [Member] | Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,042	4,913	12,176
South Africa [Member] | Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,372	1,306	2,758
South Africa [Member] | Other [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,772	2,369	2,920
South Africa [Member] | Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues			3,133
South Africa [Member] | Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	6	160	1,318
South Korea [Member] | Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	33,512	35,400	66,330	71,951
South Korea [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0
South Korea [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	33,512	35,400		71,951
South Korea [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0
South Korea [Member] | Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	32,000	34,382		68,971
South Korea [Member] | Welfare Benefit Distribution [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Welfare Benefit Distribution [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,512
South Korea [Member] | Telecom Products And Services [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,018		2,980
South Korea [Member] | Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
Rest Of World [Member] | Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	851	2,724	2,050	5,560
Rest Of World [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0
Rest Of World [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	851	2,724	2,050	5,560
Rest Of World [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			51,762
Rest Of World [Member] | Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0
Rest Of World [Member] | Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	851	2,543	$ 2,050	5,198
Rest Of World [Member] | Welfare Benefit Distribution [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
Rest Of World [Member] | Welfare Benefit Distribution [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
Rest Of World [Member] | Telecom Products And Services [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			7,943
Rest Of World [Member] | Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			13,745
Rest Of World [Member] | Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			15,946
Rest Of World [Member] | Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			9,941
Rest Of World [Member] | Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			3,821
Rest Of World [Member] | Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ 181		362
Rest Of World [Member] | Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0			$ 366