Equity-Accounted Investments And Other Long-Term Assets (Carrying Amount Of Equity-Accounted Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2016
Equity-Accounted Investments And Other Long-Term Assets [Abstract]
Equity	$ 85,179	$ 25,703		$ 24,489
Loans	3,152	2,159	[1]	$ 1,156
Total	$ 88,331	$ 27,862

[1] The foreign currency adjustment represents the effects of the fluctuations of the South African rand, Nigerian naira and Namibian dollar, against the U.S. dollar on the carrying value.