Equity-Accounted Investments And Other Long-Term Assets (Summary Of Unrealized Gain (Loss) On Investments) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2022	Jun. 30, 2021
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	$ 26,993	$ 26,993
Unrealized holding gains	49,304	49,304
Unrealized holding losses	0	0
Carrying value	76,297	76,297
MobiKwik [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	26,993	26,993
Unrealized holding gains	49,304	49,304
Unrealized holding losses	0	0
Carrying value	76,297	76,297
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
CPS [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