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           Financial Instruments - Fair Value and Settlements of Derivatives (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | ||
|---|---|---|---|
| 
           Dec. 31, 2012 
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           Dec. 31, 2011 
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           Dec. 31, 2010 
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| Derivative [Line Items] | |||
| Derivative gain (loss) | $ 58 | $ (2,251) | $ 461 | 
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           LNG Inventory Derivatives [Member] 
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        |||
| Derivative [Line Items] | |||
| Derivative gain (loss) | $ 995 | $ 2,475 | $ 2,265 | 
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- Details 
          
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- Definition 
          Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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