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Financial Instruments - Schedule of Gain (Loss) in Statement of Financial Performance (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (Loss) on Derivative Instruments, Net, Pretax | $ 287 | $ (716) | $ (288) | $ (1,164) |
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LNG Inventory Derivatives
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (Loss) on Derivative Instruments, Net, Pretax | (265) | 838 | 599 | 384 |
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Fuel Derivative
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (Loss) on Derivative Instruments, Net, Pretax | $ (287) | $ 716 | $ 288 | $ 1,164 |