Financial Instruments - Gains (losses) on derivative and non-derivative financial instruments that were recorded in accumulated other comprehensive (loss) (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cross-currency swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in accumulated other comprehensive (loss) on derivatives and non-derivatives	$ (6,003)	$ 6,869
Foreign denominated debt
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in accumulated other comprehensive (loss) on derivatives and non-derivatives	$ (16,175)	$ (8,180)