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Derivative Instruments and Hedging Activities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Jun. 30, 2013
Fair value of derivatives    
Total derivatives designated as hedging instruments $ 220 $ 205
Total derivatives not designated as hedging instruments (1,020) 40
Total derivatives (800) 245
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 184 658
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
   
Fair value of derivatives    
Derivative liabilities designated as hedging instruments (6) (522)
Range Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 42 69
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
   
Fair value of derivatives    
Derivative assets designated as hedging instruments 27 48
Currency Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
   
Fair value of derivatives    
Derivative liabilities designated as hedging instruments $ (1,047) $ (8)