Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax [Line Items]
Income before income taxes	$ 126,237	$ 140,418	$ 109,142
South Africa [Member]
Income Tax [Line Items]
Income before income taxes	119,097	137,138	121,338
United States [Member]
Income Tax [Line Items]
Income before income taxes	(5,915)	(7,286)	(9,923)
Other [Member]
Income Tax [Line Items]
Income before income taxes	$ 13,055	$ 10,566	$ (2,273)