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Financial Instruments Financial Instruments - Fair Value of Derivative Instruments by Balance Sheet Location (Details) (Fair Value, Measurements, Recurring [Member], Fair Value, Inputs, Level 2 [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Derivative Assets, Current $ 283 $ 126
LNG Inventory Derivatives [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Current 0 (171)
LNG Inventory Derivatives [Member] | Prepaid Expenses And Other [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Current 0 (171)
Fuel Derivatives [Member] | Prepaid Expenses And Other [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Assets, Current $ 283 $ 126