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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 | Sep. 30, 2025 | Jun. 30, 2025
--- | --- | ---
Schedule Of Equity And Held To Maturity Investments [Line Items] |  |
Cost basis | $ 0 |
Unrealized holding gains | 0 |
Unrealized holding losses | 0 |
Carrying value | 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
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

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- References No definition available. + Details
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- Definition Available-for-sale Securities, Accumulated Gross Unrealized loss, before Tax + References No definition available. + Details
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- Definition Available-for-sale Securities, Accumulated Gross Unrealized loss, before Tax + References No definition available. + Details
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- Definition Schedule Of Equity And Held To Maturity Investments [Line Items] + References No definition available. + Details
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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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