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Fair Value Of Financial Instruments (Movement in Carrying Value Of Assets Measured At Fair Value On Recurring Basis) (Details) $ in Thousands | 12 Months Ended
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Jun. 30, 2018 USD ($)
Asset |  |
Acquisition of investment in Cell C | $ 5,824 |
Change in fair value of Cell C | 32,473 | [1]
Balance as of June 30, 2018 | 181,880 |
Significant Unobservable Inputs (Level 3) [Member] |  |
Asset |  |
Balance as of June 30, 2018 | 172,948 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Asset |  |
Acquisition of investment in Cell C | 151,003 |
Change in fair value of Cell C | 32,473 |
Foreign currency adjustment | (10,528) |
Balance as of June 30, 2018 | $ 172,948 |
[1] | Certain amounts have been restated to correct the misstatements discussed in Note 1.

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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