Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Derivative Netting Adjustments) (Details)

v2.4.0.8
Derivative Instruments and Hedging Activities (Derivative Netting Adjustments) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Offsetting Assets and Liabilities [Line Items]    
Derivative Assets $ 851 $ 60
Derivative Liabilities (6,577) (1,108)
Current assets: Fair value of hedging contracts [Member]
   
Offsetting Assets and Liabilities [Line Items]    
Derivative Asset, Fair Value, Gross Asset 26  
Derivative Asset, Fair Value, Gross Liability (26)  
Long-term assets: Fair value of hedging contracts [Member]
   
Offsetting Assets and Liabilities [Line Items]    
Derivative Asset, Fair Value, Gross Asset 851  
Derivative Assets 851  
Current liabilities: Fair value of hedging contracts [Member]
   
Offsetting Assets and Liabilities [Line Items]    
Derivative Liability, Fair Value, Gross Liability (5,332)  
Derivative Liability, Fair Value, Gross Asset 26  
Derivative Liabilities (5,306)  
Long-term liabilities: Fair value of hedging contracts [Member]
   
Offsetting Assets and Liabilities [Line Items]    
Derivative Liability, Fair Value, Gross Liability (1,271)  
Derivative Liabilities (1,271)  
Not Designated as Hedging Instrument [Member]
   
Offsetting Assets and Liabilities [Line Items]    
Derivative Assets 851 60
Derivative Liabilities $ (6,577) $ (1,108)