Revenue Recognition (Revenue Disaggregated By Major Revenue Streams) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 55,558	$ 86,484	$ 210,394	$ 309,518
Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	36,514	36,586	125,019	149,174
South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,812	16,074	53,182	71,340
International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,564	2,302	3,613	7,862
Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,138	18,210	68,224	69,972
Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,156	14,166	50,157	63,426
Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,564	2,125	3,613	7,323
Welfare Benefit Distributions [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	656			3,086
Welfare Benefit Distributions [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
Telecom Products And Services [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,704	3,449	19,637	11,392
Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,525	2,445	10,888	16,190
Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,552	6,075	16,090	22,021
Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,071	5,343	16,247	15,284
Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,228	755	3,986	4,576
Other [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,908	3,025	4,828
Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		177	0	539
Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	58	143	1,376	509
South Africa [Member] | Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	34,950	34,284	121,406	141,312
South Africa [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,812	16,074	53,182	71,340
South Africa [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
South Africa [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,138	18,210	68,224
South Africa [Member] | Processing Fees [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	17,156	14,166	50,157	63,426
South Africa [Member] | Processing Fees [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
South Africa [Member] | Welfare Benefit Distributions [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	656			3,086
South Africa [Member] | Welfare Benefit Distributions [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	3,704	3,449	19,637
South Africa [Member] | Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,525	2,445	10,888
South Africa [Member] | Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,552	6,075	16,090
South Africa [Member] | Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,071	5,343	16,247
South Africa [Member] | Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,228	755	3,986
South Africa [Member] | Other [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		1,908	3,025	4,828
South Africa [Member] | Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues			0
South Africa [Member] | Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	58	143	1,376
South Korea [Member] | Continuing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
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	0	0		0
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	0	0		0
South Korea [Member] | Welfare Benefit Distributions [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
South Korea [Member] | Welfare Benefit Distributions [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
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		0		0
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	1,564	2,302	3,613	7,862
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	1,564	2,302	3,613	7,862
Rest Of World [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			69,972
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	1,564	2,125	$ 3,613	7,323
Rest Of World [Member] | Welfare Benefit Distributions [Member] | South African Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues	0
Rest Of World [Member] | Welfare Benefit Distributions [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			11,392
Rest Of World [Member] | Account Holder Fees [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			16,190
Rest Of World [Member] | Lending Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			22,021
Rest Of World [Member] | Technology Products [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			15,284
Rest Of World [Member] | Insurance Revenue [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	0			4,576
Rest Of World [Member] | Other [Member] | International Transaction Processing [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ 177		539
Rest Of World [Member] | Other [Member] | Financial Inclusion And Applied Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0			$ 509