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Operating Segments (Long-Lived Assets Based On Geographical Location) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets $ 295,207 $ 342,050 $ 339,123
South Africa [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets 72,467 105,627 117,858
South Korea [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets 202,682 229,830 213,589
Rest Of World [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets $ 20,058 $ 6,593 $ 7,676