Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Tax [Line Items]
Income before income taxes	$ 140,418	$ 109,142	$ 27,279
South Africa [Member]
Income Tax [Line Items]
Income before income taxes	137,138	121,338	38,654
United States [Member]
Income Tax [Line Items]
Income before income taxes	(7,286)	(9,923)	(10,075)
Other [Member]
Income Tax [Line Items]
Income before income taxes	$ 10,566	$ (2,273)	$ (1,300)

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration