Supplemental Cash Flow Information (Cash Flow Movements If Cash Had Been Transferred) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Other Significant Noncash Transactions [Line Items]
Issue of shares of the Company's common stock to BEE partners	$ 111,444	$ 2,045	$ 198
Purchase of shares from BEE partners	$ (26,637)	$ (9,151)
Black Economic Empowerment [Member] | If Cash Had Actually Flowed Between The Parties [Member]
Other Significant Noncash Transactions [Line Items]
Loans provided to BEE partners			(25,054)
Loans repaid by BEE partners			24,574
Issue of shares of the Company's common stock to BEE partners			25,054
Purchase of shares from BEE partners			$ (24,858)