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Derivative Instruments and Hedging Activities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Fair value of derivatives    
Total derivatives designated as hedging instruments $ 2,631 $ 220
Total derivatives not designated as hedging instruments 3,702 (1,020)
Total derivatives 6,333 (800)
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 2,631 184
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
   
Fair value of derivatives    
Derivative liabilities designated as hedging instruments 0 (6)
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 0 42
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 3,803 27
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
   
Fair value of derivatives    
Derivative liabilities designated as hedging instruments $ (101) $ (1,047)