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Fair Value Of Financial Instruments (Schedule Of Impact On Carrying Value Of Cell C Investment) (Details) $ in Thousands | Sep. 30, 2025 USD ($)
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Weighted Average Cost of Capital (WACC) Rate [Member] | 2.5% Increase [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitivity for fair value of Cell C investment | $ 0
Weighted Average Cost of Capital (WACC) Rate [Member] | 2.5% Decrease [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitivity for fair value of Cell C investment | 64
EBITDA Multiple [Member] | 2.5% Increase [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitivity for fair value of Cell C investment | 1,720
EBITDA Multiple [Member] | 2.5% Decrease [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitivity for fair value of Cell C investment | $ 0

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