v3.26.1
FINANCIAL INSTRUMENTS (Schedule of Carrying Value and Estimated Fair Value of Financial Assets and Liabilities) (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Jun. 30, 2026
NOK (kr)
Apr. 30, 2026
Dec. 31, 2025
USD ($)
Apr. 30, 2024
Non-Derivatives [Abstract]          
Senior unsecured interest rate (in percentage)     7.75%    
Derivatives [Abstract]          
Interest rate/ currency swap contracts - long-term receivables $ 22,123     $ 14,092  
7.25% senior unsecured sustainability-linked bonds due 2026          
Non-Derivatives [Abstract]          
Senior unsecured interest rate (in percentage) 7.25% 7.25%      
8.875% senior unsecured sustainability-linked bonds due 2027          
Non-Derivatives [Abstract]          
Senior unsecured interest rate (in percentage) 8.875% 8.875%      
8.25% senior unsecured sustainability-linked bonds due 2028          
Non-Derivatives [Abstract]          
Senior unsecured interest rate (in percentage) 8.25% 8.25%     8.25%
NOK750 million senior unsecured floating rate bonds due 2029          
Non-Derivatives [Abstract]          
U.S. dollar floating rate debt | kr   kr 750,000,000      
7.75% senior unsecured sustainability-linked bonds due 2030          
Non-Derivatives [Abstract]          
Senior unsecured interest rate (in percentage) 7.75% 7.75%     7.75%
Long-term debt $ 225,000     144,400  
Carrying value          
Non-Derivatives [Abstract]          
Equity securities 4,873     4,146  
Debt securities 140     0  
Derivatives [Abstract]          
Interest rate/ currency swap contracts - long-term receivables 22,123     14,092  
Interest rate/ currency swap contracts - long-term payables 240     6,146  
Carrying value | 7.25% senior unsecured sustainability-linked bonds due 2026          
Non-Derivatives [Abstract]          
Long-term debt 0     150,000  
Carrying value | 8.875% senior unsecured sustainability-linked bonds due 2027          
Non-Derivatives [Abstract]          
Long-term debt 150,000     150,000  
Carrying value | 8.25% senior unsecured sustainability-linked bonds due 2028          
Non-Derivatives [Abstract]          
Long-term debt 147,600     147,600  
Carrying value | NOK750 million senior unsecured floating rate bonds due 2029          
Non-Derivatives [Abstract]          
Long-term debt 75,740     74,327  
Carrying value | 7.75% senior unsecured sustainability-linked bonds due 2030          
Non-Derivatives [Abstract]          
Long-term debt 225,000     144,400  
Fair value          
Non-Derivatives [Abstract]          
Equity securities 4,873     4,146  
Debt securities 140     0  
Derivatives [Abstract]          
Interest rate/ currency swap contracts - long-term receivables 22,123     14,092  
Interest rate/ currency swap contracts - long-term payables 240     6,146  
Fair value | 7.25% senior unsecured sustainability-linked bonds due 2026          
Non-Derivatives [Abstract]          
Long-term debt 0     151,500  
Fair value | 8.875% senior unsecured sustainability-linked bonds due 2027          
Non-Derivatives [Abstract]          
Long-term debt 151,215     154,575  
Fair value | 8.25% senior unsecured sustainability-linked bonds due 2028          
Non-Derivatives [Abstract]          
Long-term debt 152,796     152,213  
Fair value | NOK750 million senior unsecured floating rate bonds due 2029          
Non-Derivatives [Abstract]          
Long-term debt 75,494     74,327  
Fair value | 7.75% senior unsecured sustainability-linked bonds due 2030          
Non-Derivatives [Abstract]          
Long-term debt $ 232,808     $ 146,927