Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2015	Sep. 30, 2014
Fair Value Of Financial Instruments [Abstract]
Years of significant fluctuation of US Dollar to ZAR exchange rate	3 years
Equity method investment, shares	156,788,712
Percentage of total assets represented by acquisition of share capital.	1.00%
Transfers in or out of Level 3	$ 0	$ 0
Impairment charges	$ 0	$ 0

Equity Method Investment On Company's Ownership, Shares

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- Definition

Number Of Years In Which U S Dollar To Zar Exchange Rate Has Fluctuated Significantly

+ References

No definition available.

+ Details

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- Definition

Percentage of total assets represented by acquisition of share capital.

+ References

No definition available.

+ Details

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

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- References

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