Fair Value Of Financial Instruments (Carrying Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - Recurring [Member] - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Assets
Beginning balance, Carrying value		$ 181,880
Ending balance, Carrying value		176,304
Liabilities
Beginning balance, Carrying value		27,222
Ending balance, Carrying value		26,991
Significant Unobservable Inputs (Level 3) [Member]
Assets
Beginning balance, Carrying value		172,948	$ 151,003
Foreign currency adjustment		(5,113)	(3,530)
Ending balance, Carrying value		167,835	$ 147,473
Liabilities
Beginning balance, Carrying value		27,222
Accretion of interest		422
Foreign currency adjustment	[1]	(805)
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.