Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Other Derivatives Not Designated as Hedging (Details)

v2.4.0.6
Financial Instruments - Other Derivatives Not Designated as Hedging (Details) (Fair Value, Measurements, Recurring, Significant Other Observable Inputs (Level 2), USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
LNG Inventory Derivatives
   
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), at fair value $ (222) $ 1,951
Fuel Derivative
   
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), at fair value $ 60 $ (1,415)