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Voyage revenues (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Voyage revenues (Table)

    Years ended December 31,
    2019   2020   2021
             
Time charters $ 373,927 $ 309,503  $  745,442
Voyage charters   437,779 385,482   683,146
Pool revenues   9,659 (1,744)   (1,165)
  $ 821,365 $ 693,241  $  1,427,423