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Earnings / (Loss) per Share (Tables)
6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings / (Loss) per share
    Six months ended June 30,
    2018     2019
Income / (Loss) :          
Net income / (loss) $ 20,628   $ (45,515)
            
           
Basic earnings / (loss) per share:          
Weighted average common shares outstanding, basic   64,170,654     92,457,415
                               Basic earnings / (loss) per share $ 0.32   $ (0.49)
           
Effect of dilutive securities:          
Dillutive effect of non vested shares                298,206                             -   
Weighted average common shares outstanding, diluted   64,468,860     92,457,415
           
                               Diluted earnings / (loss) per share $ 0.32   $ (0.49)