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Revenues - Disaggregation of revenues (Table) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]    
Revenues $ 77,966 $ 70,257
Time charters [Member]    
Disaggregation of Revenue [Line Items]    
Revenues 71,728 70,257
Voyage Charters [Member]    
Disaggregation of Revenue [Line Items]    
Revenues $ 6,238 $ 0