Derivative Instruments and Hedging Activities - Fair Value of Derivatives Designated and Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Fair value of derivatives
Derivative, Fair Value, Net	$ 678	$ 1,458
Designated as Hedging Instrument [Member]
Fair value of derivatives
Derivative, Fair Value, Net	862	821
Not Designated as Hedging Instrument [Member]
Fair value of derivatives
Derivative, Fair Value, Net	(184)	637
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Fair value of derivatives
Derivative assets designated as hedging instruments	862	799
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Fair value of derivatives
Derivative liabilities designated as hedging instruments	0	(5)
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Fair value of derivatives
Derivative assets designated as hedging instruments	0	27
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Fair value of derivatives
Derivative assets designated as hedging instruments	0	839
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Fair value of derivatives
Derivative liabilities designated as hedging instruments	$ (184)	$ (202)