v3.26.3
Long-term debt and other financial liabilities (Details Narrative) - USD ($)
2 Months Ended 4 Months Ended 5 Months Ended 6 Months Ended
Feb. 19, 2026
Feb. 13, 2026
May 14, 2026
May 11, 2026
May 21, 2026
May 20, 2026
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Debt Instrument [Line Items]                  
Loans Payable to Bank             $ 1,976,571,000 $ 1,788,115,000  
Debt Instrument, Collateral Amount             10,000,000    
Debt Instrument, Unused Borrowing Capacity, Amount             1,027,830    
Other Assets, Noncurrent             15,233,000 0  
Cash and Cash Equivalent             463,989,000 293,312,000 $ 282,394,000
Minimum liquidity requirement [Member]                  
Debt Instrument [Line Items]                  
Cash and Cash Equivalent             17,366,000 $ 37,038,000  
Two loan agreements [Member]                  
Debt Instrument [Line Items]                  
Restricted Cash and Cash Equivalent             $ 2,050,000    
Maria Energy [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Frequency of Periodic Payment   semi-annual              
Line of Credit Facility, Initiation Date             Feb. 13, 2026    
Debt Instrument, Maturity Date, Description   seven-year              
Line of Credit Facility, Maximum Borrowing Capacity   $ 120,000,000              
Long-Term Debt, Description   to the refinancing of the LNG carrier, Maria Energy              
Proceeds from Issuance of Debt $ 120,000,000                
Prepaid amount $ 84,310,000                
Number of repayment installments   fourteen              
Debt Instrument, Periodic Payment   $ 5,455,000              
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid   $ 43,630,000              
V L C C Tanker Ulysses [Member]                  
Debt Instrument [Line Items]                  
Prepaid amount       $ 23,175,000          
Elias Tsakos Leontios H Thomas Zafiras Bergen T S Sunray [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Frequency of Periodic Payment     semi-annual            
Line of Credit Facility, Initiation Date             May 14, 2026    
Debt Instrument, Maturity Date, Description     five-year            
Line of Credit Facility, Maximum Borrowing Capacity     $ 142,000,000            
Long-Term Debt, Description     to the refinancing of the aframax tankers Elias Tsakos, Leontios H, Thomas Zafiras, Bergen TS and the panamax tanker Sunray            
Proceeds from Issuance of Debt           $ 142,000,000      
Prepaid amount         $ 100,740,000        
Number of repayment installments     ten            
Debt Instrument, Periodic Payment     $ 8,563,200            
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid     $ 56,368,000            
Tenergy [Member]                  
Debt Instrument [Line Items]                  
Long-Term Debt, Description             for its under-construction LNG carrier, Tenergy    
Sale Leaseback Transaction, Date             December 21, 2021    
Sale Leaseback Transaction, Lease Terms             ten-year    
All bank loans [Member]                  
Debt Instrument [Line Items]                  
Loans Payable to Bank             $ 1,976,571,000    
Debt Instrument, Frequency of Periodic Payment             semi-annual    
Maturity date             December 2026 and December 2034    
Debt Instrument, Description of Variable Rate Basis             Interest rates on the outstanding loans as at June 30, 2026, are based on Secured Overnight Financing Rate (“SOFR”) plus a spread    
Debt Instrument, Covenant Compliance             The Company fulfilled its requirements in respect of the financial covenants of all of its loan agreements as at June 30, 2026