Income Taxes (Components Of Income Before Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Tax [Line Items]
Income before income taxes	$ 109,142	$ 27,279	$ 60,381
South Africa [Member]
Income Tax [Line Items]
Income before income taxes	121,338	38,654	67,054
United States [Member]
Income Tax [Line Items]
Income before income taxes	(9,923)	(10,075)	(6,340)
Other [Member]
Income Tax [Line Items]
Income before income taxes	$ (2,273)	$ (1,300)	$ (333)