Quarterly report pursuant to Section 13 or 15(d)

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

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Financial Instruments - Fair Value of Derivative Instruments by Balance Sheet Location (Details) (USD $)
Mar. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Collateral Already Posted, Aggregate Fair Value $ 500,000 $ 900,000
LNG Inventory Derivative assets 35,000  
Fuel Derivatives liability   $ (161,000)