Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Fair Value of Financial Instruments by Balance Sheet Location (Details)

v2.4.0.6
Financial Instruments - Fair Value of Financial Instruments by Balance Sheet Location (Details) (LNG Inventory Derivatives [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability $ (421)  
Derivative Asset, Fair Value, Gross Asset   232
Prepaid Expenses And Other [Member]
   
Derivatives, Fair Value [Line Items]    
LNG Inventory Derivative assets   232
Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fuel Derivatives liability $ (421)