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Fair Value measurements - Gain / (Loss) Recognized (Table) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Derivative |  |  |
Loss/ (gain) on derivative instruments | $ (41) | $ 390 | $ 2,083
Freight Derivatives |  |  |
Derivative |  |  |
Loss/ (gain) on derivative instruments | (41) | 390 | 2,078
Bunker Derivatives |  |  |
Derivative |  |  |
Loss/ (gain) on derivative instruments | $ 0 | $ 0 | $ 5

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 + Details
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