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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jul. 16, 2015
Income Taxes |  |  |  |  |
Ownership percentage held by each shareholder (as a percent) |  | 5.00% |  |  |
Percentage of shipping income attributable to transportation that begins or ends in the United States included in United States source shipping income |  | 50.00% |  |  |
Tax rate on 50% of shipping income if not qualified for Section 883 |  | 4.00% |  |  |
Gross transportation tax |  | $ 365 | $ 0 | $ 0 |
Tax on branch profits |  | 30.00% |  |  |
Percentage of shipping income sourced to United States if attributable to transportation exclusively between United States ports |  | 100.00% |  |  |
Percentage of shipping income sourced to United States if no transportation is attributable to United States |  | 0.00% |  |  |
Total revenue earned |  |  | 2,340 | 3,175 |
Taxable income |  | $ (58,725) | (217,048) | (252,547) |
Income tax expense |  |  | 709 | 1,821 |
Minimum |  |  |  |  |
Income Taxes |  |  |  |  |
Percentage of value of outstanding shares owned by the qualified shareholders |  | 50.00% |  |  |
Maximum |  |  |  |  |
Income Taxes |  |  |  |  |
Combined ownership held by 5% shareholders (as a percent) |  | 50.00% |  |  |
Percentage of shipping income attributable to transportation that begins or ends in the United States included in United States source shipping income |  | 50.00% |  |  |
Vessel Management Services |  |  |  |  |
Income Taxes |  |  |  |  |
Total revenue earned |  | $ 0 | 2,340 | 6,410 |
Taxable income |  |  | 1,502 | 3,880 |
Income tax expense |  |  | 709 | 1,753 |
Vessel Management Services | Intersegment Elimination |  |  |  |  |
Income Taxes |  |  |  |  |
Total revenue earned |  |  | $ 0 | (3,235) |
Genco Shipping Pte. Ltd. |  |  |  |  |
Income Taxes |  |  |  |  |
Income tax expense |  | $ 0 |  |  |
Forecast |  |  |  |  |
Income Taxes |  |  |  |  |
Federal tax rate (as a percent) | 21.00% |  |  |  |
Baltic Trading | Minimum |  |  |  |  |
Income Taxes |  |  |  |  |
Aggregate voting power held (as a percent) |  |  |  |  | 50.00%
Baltic Trading | United States |  |  |  |  |
Income Taxes |  |  |  |  |
Income tax expense |  |  |  | $ 68 |

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