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Dropdowns (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
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Dec. 31, 2010 Vessel | Dec. 31, 2009 | Mar. 17, 2010 Suezmax Tankers [Member] Tanker | Mar. 17, 2010 Handymax Product tanker [Member] Tanker
Dropdowns (Textual) [Abstract] |  |  |  |
Number of vessels acquired | 3 |  | 2 | 1
Increase in Partnership's net income (loss) due to effect of adjustment in common control exchanges | $ 2.3 | $ 5.3 |  |

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- Definition Adjustment to Partnership's net income (loss) as a result of business acquisitions between entities under common control. + References No definition available. + Details
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- Definition Number of vessels acquired. + References No definition available. + Details
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