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Financial risk management, objectives and policies, Market risk (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Type
Swap
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Market risk [Abstract]      
Number of types of risk in market prices | Type 4    
Number of interest rate swaps | Swap 9    
Interest rate swaps total aggregate notional amount $ 311,590 $ 334,365  
Increase (decrease) in profit (loss) due to change in interest rates by fifty basis points $ (457) $ (981) $ (488)