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Equity-Accounted Investments And Other Long-Term Assets (Summary Of Unrealized Gain (Loss) On Investments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Cost basis $ 26,993 $ 10,395
Carrying value 26,993 10,395
MobiKwik [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Cost basis 26,993  
Carrying value $ 26,993  
Cedar Cellular [Member]    
Schedule Of Equity And Held To Maturity Investments [Line Items]    
Cost basis   10,395
Carrying value   10,395
Interest income reclassified to the cost basis   $ 1,400