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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Bunker swaps and Forward Purchase Agreements (Details) - Bunker Swap and Forward Fuel Purchase Agreements - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Summary of Significant Accounting Policies          
Fair value of derivatives - asset position $ 0   $ 0   $ 0
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Prepaid Expense and Other Assets, Current   Prepaid Expense and Other Assets, Current   Prepaid Expense and Other Assets, Current
Fair value of derivatives - liability position $ 0   $ 0   $ 6
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts Payable and Accrued Liabilities, Current   Accounts Payable and Accrued Liabilities, Current   Accounts Payable and Accrued Liabilities, Current
Other Expense          
Summary of Significant Accounting Policies          
Realized gains $ 4 $ 92 $ 12 $ 110  
Unrealized (losses) gains $ 0 $ (121) $ 6 $ 39