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Fair Value Of Financial Instruments (Outstanding Foreign Exchange Contracts) (Details) - 12 months ended Jun. 30, 2016
EUR (€)
ZAR / item
ZAR / shares
Foreign Exchange Contract 1 [Member]    
Derivatives, Fair Value [Line Items]    
Notional amount | € € 573,765.00  
Strike price | ZAR / item 15.9587  
Fair market value price | ZAR / shares   ZAR 16.3393
Maturity Jul. 20, 2016  
Foreign Exchange Contract 2 [Member]    
Derivatives, Fair Value [Line Items]    
Notional amount | € € 554,494.50  
Strike price | ZAR / item 16.0643  
Fair market value price | ZAR / shares   16.4564
Maturity Aug. 19, 2016  
Foreign Exchange Contract 3 [Member]    
Derivatives, Fair Value [Line Items]    
Notional amount | € € 465,711.00  
Strike price | ZAR / item 16.1798  
Fair market value price | ZAR / shares   16.5820
Maturity Sep. 20, 2016  
Foreign Exchange Contract 4 [Member]    
Derivatives, Fair Value [Line Items]    
Notional amount | € € 393,675.00  
Strike price | ZAR / item 16.2911  
Fair market value price | ZAR / shares   16.7017
Maturity Oct. 20, 2016  
Foreign Exchange Contract 5 [Member]    
Derivatives, Fair Value [Line Items]    
Notional amount | € € 302,368.50  
Strike price | ZAR / item 16.4085  
Fair market value price | ZAR / shares   ZAR 16.8301
Maturity Nov. 21, 2016