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Significant Accounting Policies - Impact of the Adoption of ASC 606 on consolidated Statement of Operations (Table) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Statement of Income Captions [Line Items] |  |  |
Voyage revenues | $ 651,561 | $ 331,976 | $ 221,987
Voyage expenses | 121,596 | 64,682 | 65,821
Charter-in hire expenses | 92,896 | 5,325 | 3,550
Net income/(loss) | $ 58,397 | $ (9,771) | $ (154,228)
Earnings/(Loss) per share, basic | $ 0.76 | $ (0.16) | $ (3.24)
Earnings/(Loss) per share, diluted | $ 0.76 | $ (0.16) | $ (3.24)
Balances without Standard Adoption | ASC 606 |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |
Voyage revenues | $ 652,228 |  |
Voyage expenses | 122,037 |  |
Charter-in hire expenses | 93,508 |  |
Net income/(loss) | $ 58,011 |  |
Earnings/(Loss) per share, basic | $ 0.75 |  |
Earnings/(Loss) per share, diluted | $ 0.75 |  |
Effect of Standard Adoption | ASC 606 |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |
Voyage revenues | $ (667) |  |
Voyage expenses | 441 |  |
Charter-in hire expenses | 612 |  |
Net income/(loss) | $ 386 |  |
Earnings/(Loss) per share, basic | $ 0.01 |  |
Earnings/(Loss) per share, diluted | $ 0.00 |  |

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