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Financial Instruments (Details) (USD $)
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12 Months Ended | |||||||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value of LNG inventory derivatives | $ 1,951,000 | [1] | ||||||
| Fair value of Fuel Derivatives | 1,415,000 | [2] | ||||||
| Marketing and trading revenues | 2,500,000 | 2,300,000 | 8,600,000 | |||||
| Derivative gain (loss) | (2,251,000) | 461,000 | 5,277,000 | |||||
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Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value of LNG inventory derivatives | 0 | [1] | ||||||
| Fair value of Fuel Derivatives | 0 | [2] | ||||||
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Significant Other Observable Inputs (Level 2) [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value of LNG inventory derivatives | 1,951,000 | [1] | ||||||
| Fair value of Fuel Derivatives | 1,415,000 | [2] | ||||||
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Significant Unobservable Inputs (Level 3) [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value of LNG inventory derivatives | 0 | [1] | ||||||
| Fair value of Fuel Derivatives | $ 0 | [2] | ||||||
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Investor [Member] | 2008 Loans, Including Related Pary Loans [Member] | Convertible Loans Payable [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Instrument, Convertible, Conversion Price | $ 5.00 | |||||||
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