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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels, net (Details) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2022 $ / item | Sep. 30, 2022 USD ($) $ / shares | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) $ / shares | Sep. 30, 2021 USD ($) | Dec. 31, 2021 $ / item
Vessels, net |  |  |  |  |  |
Estimated useful life |  |  |  | 25 years |  |
Depreciation and amortization | $ |  | $ 15,582 | $ 14,200 | $ 44,162 | $ 41,409 |
Estimated scrap value (in dollars per lightweight ton) | $ / item | 400 |  |  |  |  | 310
Estimated life of average scrap value of steel | 15 years |  |  |  |  |
Decrease in depreciation expense | $ |  | $ 1,171 |  | $ 3,476 |  |
Increase in basic net earnings per share |  | $ 0.03 |  | $ 0.09 |  |
Increase in diluted net earnings per share |  | 0.03 |  | 0.08 |  |
Basic net earnings per share if no change to estimated scrap value |  | 0.93 |  | 2.98 |  |
Diluted net earnings per share if no change to estimated scrap value |  | $ 0.92 |  | $ 2.95 |  |
Vessels |  |  |  |  |  |
Vessels, net |  |  |  |  |  |
Depreciation and amortization | $ |  | $ 12,691 | $ 12,491 | $ 37,286 | $ 36,305 |

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