Derivative Financial Instruments - Fair Value of Derivative Instruments on the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Derivative Instruments Not Designated as Accounting Hedges [Member] | Short-term derivative assets: [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 231	$ 25
Derivative Instruments Not Designated as Accounting Hedges [Member] | Long-term derivative assets: [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	2
Derivative Instruments Not Designated as Accounting Hedges [Member] | Short-term derivative liabilities: [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	47	2
Derivative Instruments Not Designated as Accounting Hedges [Member] | Long-term derivative liabilities: [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Short-term derivative assets: [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	874	128
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Long-term derivative assets: [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	765	136
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Short-term derivative liabilities: [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	19	4,128
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Long-term derivative liabilities: [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 257	$ 163