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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Bunker swaps and Forward Purchase Agreements (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Summary of Significant Accounting Policies          
Fair value of derivative instruments $ 4,030   $ 4,030   $ 6,312
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
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
Bunker Swap and Forward Fuel Purchase Agreements          
Summary of Significant Accounting Policies          
Fair value of derivative instruments $ 18   $ 18   $ 168
Fair value of liability position 2   2   $ 71
Other income (expense) | Bunker Swap and Forward Fuel Purchase Agreements          
Summary of Significant Accounting Policies          
Realized (losses) gains (27) $ 667 81 $ 1,296  
Unrealized (losses) gains $ (38) $ 321 $ (80) $ 1,760