| USD thousands | 2023 | 2022 | 2021 | 2020 | 2019 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Operating results |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Total income | 1,523,569 | 1,265,118 | 584,913 | 433,591 | 1,504,495 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | EBIT | 20,987 | 18,851 | -135,939 | -362,995 | -39,297 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | EBT | 7,789 | 179 | -130,059 | -437,834 | -72,601 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Profit/loss for the period | 11,169 | -5,819 | -104,796 | -376,176 | -57,779 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        |  |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Balance sheet |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Total assets | 1,527,676 | 1,411,173 | 1,171,559 | 1,034,238 | 1,676,587 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Total equity | 288,347 | 273,386 | 222,384 | 232,809 | 482,478 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Interest bearing debt and lease liabilities | 622,893 | 592,109 | 495,921 | 397,482 | 458,460 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Net interest bearing debt and lease liabilities | 352,371 | 325,698 | 232,957 | 238,112 | 223,387 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        |  |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Cash flow |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Net cash from/to operating activities | 215,121 | 190,619 | 50,612 | -193,219 | 119,878 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Net cash to/from investing activities | -183,703 | -179,041 | 4,630 | -2,279 | -138,657 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Net cash to/from financing activities | -56,620 | 9,071 | 32,814 | 79,659 | -4,494 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Cash and cash equivalents end of period | 199,514 | 224,252 | 204,768 | 117,657 | 235,073 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        |  |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Key ratios |  |  |  |  |  | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Earnings per share in US cent per share | 0.03 | -0.02 | -0.33 | -3.04 | -1.06 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Equity ratio | 19% | 19% | 19% | 23% | 29% | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | Capex USD thousand | 144,747 | 314,508 | 184,077 | 49,160 | 269,274 | 
                    
                    
                    
                    
                    
                    
                        
                        
                        
                        | EBIT ratio | 1.4% | 1.5% | -23% | -84% | -3% |