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 |
Mar. 31, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Schedule Of Equity And Held To Maturity Investments [Line Items] | ||
| Cost basis | $ 250 | |
| Unrealized holding gains | 0 | |
| Unrealized holding losses | 0 | |
| Carrying value | 250 | |
| 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 |
| Cedar Cellular [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 | |
| Cowdi [Member] | ||
| Schedule Of Equity And Held To Maturity Investments [Line Items] | ||
| Cost basis | 250 | |
| Unrealized holding gains | 0 | |
| Unrealized holding losses | 0 | |
| Carrying value | $ 250 |