Derivative Financial Instruments - Fair Value of Derivative Instruments on the Consolidated Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2013
Short-term Investments [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 0	$ 0
Short-term Investments [Member] | Not Designated as Accounting Hedges
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	4
Short-Term Derivative Liabilities [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	7,146	9,331
Short-Term Derivative Liabilities [Member] | Not Designated as Accounting Hedges
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	(21)	565
Other Accrued Liabilities [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	0
Other Accrued Liabilities [Member] | Not Designated as Accounting Hedges
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	29	25
Other Long Term Liabilities [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	210	1,129
Other Long Term Liabilities [Member] | Not Designated as Accounting Hedges
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 0