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Equity Accounted Investments (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract] |  |  |
Income from vessel operations | $ 98,112 | $ 234,123 | $ 169,788
Other [Member] |  |  |
Equity Method Investment, Summarized Financial Information [Abstract] |  |  |
Current assets | 281,933 | 135,087 |
Non-current assets | 2,545,518 | 1,867,161 |
Current liabilities | 252,439 | 106,858 |
Non-current liabilities | 2,118,550 | 1,507,800 |
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract] |  |  |
Revenues | 333,020 | 232,516 | 238,838
Income from vessel operations | 134,617 | 91,290 | 97,708
Net (loss) income | $ (48,732) | $ (44,794) | $ 136,444

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