Equity-Accounted Investments And Other Long-Term Assets (Summary Of Components Of Equity Securities Without Readily Determinable Fair Value And Held To Maturity Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	$ 26,993	$ 26,993
Carrying value	26,993	26,993
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Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	26,993	26,993
Carrying value	$ 26,993	$ 26,993