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 ($)	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	$ 26,993,000	$ 26,993,000
Unrealized holding gains	49,304,000	49,304
Unrealized holding losses	0	0
Carrying value	76,297,000	76,297,000
Mobikwik [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	26,993,000	26,993,000
Unrealized holding gains	49,304,000	49,304
Unrealized holding losses	0	0
Carrying value	76,297,000	76,297,000
CPS [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	0
Unrealized holding gains	0
Unrealized holding losses	0
Carrying value	0
Cedar Cellular [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	0	0
Unrealized holding gains	0	0
Unrealized holding losses	0	0
Carrying value	$ 0	$ 0