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Segment information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Vessel
Customer
Segment
Dec. 31, 2023
USD ($)
Customer
Vessel
Dec. 31, 2022
USD ($)
Customer
Vessel
Operating Segments [Abstract]      
Number of operating segments | Segment 1    
Information About Major Customers [Abstract]      
Number of vessels in operation | Vessel 24 24 23
Shipping revenues $ 567,835 $ 556,075 $ 450,381
Number of major customers | Customer 5 5 5
Time Charters [Member]      
Information About Major Customers [Abstract]      
Number of vessels in operation | Vessel 7 5 5
Spot Market [Member]      
Information About Major Customers [Abstract]      
Number of vessels in operation | Vessel 17 19 18
Major Customer [Member]      
Information About Major Customers [Abstract]      
Shipping revenues $ 348,836 $ 340,480 $ 223,131
Percentage of aggregate revenue 61.00% 61.00% 50.00%
Customer One [Member]      
Information About Major Customers [Abstract]      
Shipping revenues $ 113,134 $ 87,379 $ 80,198
Customer Two [Member]      
Information About Major Customers [Abstract]      
Shipping revenues 98,634 84,493 68,829
Customer Three [Member]      
Information About Major Customers [Abstract]      
Shipping revenues 72,462 71,291 27,443
Customer Four [Member]      
Information About Major Customers [Abstract]      
Shipping revenues 40,368 57,641 26,873
Customer Five [Member]      
Information About Major Customers [Abstract]      
Shipping revenues $ 24,237 $ 39,676 $ 19,788