Debt (Schedule Of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Debt [Abstract]
Long-term debt	$ 1,020,000	$ 1,080,000
Deferred borrowing costs	(1,129)	(1,389)
Long-term debt, net	$ 1,018,871	$ 1,078,611