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Operating Segments (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Jun. 30, 2020
USD ($)
Item
Jun. 30, 2019
USD ($)
Item
Jun. 30, 2018
USD ($)
Segment Reporting Information [Line Items]            
Number of reportable segments | Item       3    
Impairment of goodwill   $ 8,200   $ 5,589 $ 14,440 $ 20,917
Termination fee to cancel Bank Frick option       17,517 $ 0 0
Intersegment Elimination [Member]            
Segment Reporting Information [Line Items]            
Termination fee to cancel Bank Frick option       $ 17,500    
Sales Revenue Net [Member] | Customer Concentration Risk [Member]            
Segment Reporting Information [Line Items]            
Number of customers accounting for more than ten percent of total revenue | Item       0 0  
Dni4pl Contracts Proprietary Limited [Member] | Intersegment Elimination [Member]            
Segment Reporting Information [Line Items]            
Impairment of intangible asset         $ 5,300  
International Transaction Processing [Member]            
Segment Reporting Information [Line Items]            
Impairment of goodwill   7,000 $ 19,900   7,000 19,900
Financial Inclusion And Applied Technology [Member]            
Segment Reporting Information [Line Items]            
Impairment of goodwill         6,200  
South African Transaction Processing [Member]            
Segment Reporting Information [Line Items]            
Impairment of goodwill $ 5,600 $ 1,200   $ 5,600 $ 1,200 $ 1,100
South African Transaction Processing [Member] | Sales Revenue Net [Member] | Customer Concentration Risk [Member]            
Segment Reporting Information [Line Items]            
Significant customers that account for more than 10% of the total revenue           19.00%