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Financial risk management, objectives and policies, Liquidity risk (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Contractual Maturities of Financial Liabilities [Abstract]    
Interest bearing loans $ 574,973 $ 494,552
Interest rate swaps 13,890 20,956
Total 588,863 515,507
1 Year [Member]    
Contractual Maturities of Financial Liabilities [Abstract]    
Interest bearing loans 24,112 19,110
Interest rate swaps 8,929 8,541
Total 33,041 27,651
2 to 5 Years [Member]    
Contractual Maturities of Financial Liabilities [Abstract]    
Interest bearing loans 430,136 475,441
Interest rate swaps 4,961 12,415
Total 435,097 487,857
More than 5 Years [Member]    
Contractual Maturities of Financial Liabilities [Abstract]    
Interest bearing loans 120,724 0
Interest rate swaps 0 0
Total $ 120,724 $ 0