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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels, net (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) $ / item | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Vessels, net |  |  |
Estimated useful life | 25 years |  |
Estimated scrap value (in dollars per lightweight ton) | $ / item | 400 |  |
Depreciation and amortization | $ 68,666 | $ 66,465 | $ 60,190
Vessels |  |  |
Vessels, net |  |  |
Depreciation and amortization | $ 48,165 | $ 50,525 | $ 50,092

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