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Equity-Accounted Investments And Other Long-Term Assets (Summary Of Other Long-Term Asset) (Details) - USD ($)
Jun. 30, 2021
Jun. 30, 2020
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 76,297,000 $ 26,993,000
Total held to maturity investments 0 0
Policy holder assets under investment contracts (Note 10) 381,000 490,000
Reinsurance assets under insurance contracts (Note 10) 1,298,000 1,006,000
Total other long-term assets 81,866,000 31,346,000
Bank Frick [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Long-term portion of amount due from sale of interest 3,890,000 0
DNI [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Long-term portion of amount due from sale of interest 0 2,857,000
Mobikwik [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 76,297,000 $ 26,993,000
Equity-accounted investments, ownership percentage 11.00% 12.00%
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%  
CPS [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total equity investments $ 0 $ 0
Equity-accounted investments, ownership percentage 87.50% 87.50%
Cedar Cellular [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Total held to maturity investments $ 0 $ 0
Equity-accounted investments, ownership percentage 7.625% 7.625%
Cedar Cellular [Member] | 8.625% Notes [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Interest rate 8.625% 8.625%