Income Taxes (Provisions For Income Taxes By Location Of Taxing Jurisdiction) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Tax [Line Items]
Current income tax	$ 61,902	$ 33,968	$ 49,092
Deferred taxation (benefit) charge	(7,887)	(4,915)	(4,598)
Capital gains tax	202	7	1,465
Secondary taxation on companies			327
Changes in tax rate			(18,315)
Foreign tax credits generated-United States	(14,838)	(14,404)	(12,035)
INCOME TAX EXPENSE - (Note 11)	39,379	14,656	15,936
South Africa [Member]
Income Tax [Line Items]
Current income tax	41,326	15,418	26,787
Deferred taxation (benefit) charge	(3,345)	(2,037)	(2,941)
United States [Member]
Income Tax [Line Items]
Current income tax	14,838	16,061	20,746
Deferred taxation (benefit) charge	(107)	(331)	31
Other [Member]
Income Tax [Line Items]
Current income tax	5,738	2,489	1,559
Deferred taxation (benefit) charge	$ (4,435)	$ (2,547)	$ (1,688)