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Equity-Accounted Investments And Other Long-Term Assets (Summary Of Other Long-Term Asset) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Jun. 30, 2021
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 76,297 $ 76,297
Long-term portion of amount due related to sale of interest in Bank Frick 0 3,890
Policy holder assets under investment contracts (Note 7) 342 381
Reinsurance assets under insurance contracts (Note 7) 1,182 1,298
Total other long-term assets 77,821 81,866
Held To Maturity Investments[Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments 0 0
Cell C [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 0 0
Equity-accounted investments, ownership percentage 15.00%  
MobiKwik [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 76,297 $ 76,297
Equity-accounted investments, ownership percentage 10.00% 12.00%
CPS [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 0 $ 0
Equity-accounted investments, ownership percentage 87.50%  
Cedar Cellular [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Equity-accounted investments, ownership percentage 7.625%  
Cedar Cellular [Member] | 8.625% Notes [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 0 $ 0
Equity-accounted investments, ownership percentage 7.625%  
Interest rate 8.625%