Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - lb lb in Thousands	9 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	(34,716)	(35,159)
Cash Flow Hedging
Derivative [Line Items]
Derivative contract term	18 months
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	(32,625)	(33,038)
Cash Flow Hedging | Not Designated as Hedging Instrument | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	(2,129)	(2,121)
Cash Flow Hedging | Not Designated as Hedging Instrument | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	(38)	0