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Financial risk management, objectives and policies, Credit risk (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Customer
Vessel
Institution
Counterparty
Dec. 31, 2021
USD ($)
Customer
Vessel
Counterparty
Dec. 31, 2020
Customer
Vessel
Counterparty
Credit risk [Abstract]      
Number of vessels chartered with counterparties | Vessel 5 7 18
Number of vessels | Vessel 23 26 27
Number of counterparties | Counterparty 4 5 10
Number of vessels operated in spot market | Vessel 18 19 9
Number of financial institutions for holding cash | Institution 6    
Number of major customers | Customer 5 5 5
Current trade receivables [1] $ 59,465 $ 30,361  
Disclosure of maximum credit exposure [Abstract]      
Cash and cash equivalents 125,948 60,658  
Accounts receivable and accrued revenues 59,465 30,361  
Maximum credit exposure 185,412 $ 91,018  
Customer One [Member]      
Credit risk [Abstract]      
Current trade receivables 17,715    
Customer Two [Member]      
Credit risk [Abstract]      
Current trade receivables 7,514    
Customer Three [Member]      
Credit risk [Abstract]      
Current trade receivables 7,349    
Customer Four [Member]      
Credit risk [Abstract]      
Current trade receivables 7,306    
Customer Five [Member]      
Credit risk [Abstract]      
Current trade receivables $ 5,576    
[1] Amortized cost.