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Fair Value Of Financial Instruments (Carrying Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - Significant Unobservable Inputs (Level 3) [Member] - Recurring [Member]
$ in Thousands
3 Months Ended
Sep. 30, 2018
USD ($)
Assets  
Beginning balance, Carrying value $ 172,948
Foreign currency adjustment (5,113)
Ending balance, Carrying value 167,835
Liabilities  
Beginning balance, Carrying value 27,222
Accretion of interest 422
Foreign currency adjustment (805) [1]
Ending balance, Carrying value $ 26,839
[1] The foreign currency adjustment represents the effects of the fluctuations of the South African rand and the U.S. dollar on the carrying value.