Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Derivative Instruments and Hedging Activities (Derivative Netting Adjustments) (Details) (Not Designated as Hedging Instrument [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral $ 60 $ 1,924
Derivative Liability, Fair Value, Amount Not Offset Against Collateral (1,108) (241)
Current liabilities - Fair market value of derivatives [Member]
    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 8  
Derivative Asset, Fair Value, Netting Adjustments 52  
Derivative Assets (Liability), Fair Value, Gross Asset Net 60  
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 1,088  
Derivative Liability, Fair Value, Netting Adjustments (52)  
Derivative Assets (Liability), Fair Value, Gross Liability Net 1,036  
Non-current assets - Other long-term assets [Member]
    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0  
Derivative Asset, Fair Value, Netting Adjustments 0  
Derivative Assets (Liability), Fair Value, Gross Asset Net 0  
Non-current liabilities - Other long-term liabilities [Member]
    
Derivative [Line Items]    
Derivative Liability, Fair Value, Amount Not Offset Against Collateral (72)  
Derivative Liability, Fair Value, Netting Adjustments 0  
Derivative Assets (Liability), Fair Value, Gross Liability Net $ (72)