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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long-lived Assets (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |
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Jan. 01, 2022 $ / item | Jul. 06, 2021 USD ($) | Apr. 08, 2021 USD ($) | Jan. 25, 2021 USD ($) | Jan. 22, 2021 USD ($) | Dec. 17, 2020 USD ($) item | Nov. 30, 2020 USD ($) | Nov. 27, 2020 USD ($) | Nov. 03, 2020 USD ($) | Oct. 16, 2020 USD ($) | Sep. 25, 2020 USD ($) | Sep. 17, 2020 USD ($) | Dec. 31, 2022 USD ($) $ / item | Dec. 31, 2021 USD ($) $ / item | Dec. 31, 2020 USD ($) item | Sep. 30, 2020 USD ($) item | Mar. 31, 2020 item | Feb. 24, 2020 item
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Historical one-year time charter average period |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Time charter average period |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  |  |  |  |  | 25 years |  |  |  |  |
Fleet utilization (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 98.00% |  |  |  |  |
Estimated scrap value (in dollars per lightweight ton) | $ / item | 400 |  |  |  |  |  |  |  |  |  |  |  | 400 | 310 |  |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 208,935 |  |  |
Genco Cougar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of assets |  |  |  |  |  |  | $ 7,600 |  |  |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
Genco Lorraine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,751 |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 404 |  |  |
Sale of assets |  | $ 7,950 |  |  | $ 7,950 |  |  |  |  |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  | 2.50% |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Cougar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,372 |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 790 |  |  |
Baltic Leopard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,840 |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 399 |  |  |
Sale of assets |  |  | $ 8,000 | $ 8,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  | 2.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Hare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,595 |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 769 |  |  |
Sale of assets |  |  |  |  |  |  |  | $ 7,750 |  |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |
Supramax Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number impaired vessel assets | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 67,200 |  |  |
Ultramax Vessels | Agreement To Exchange Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels to be exchanged | item |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Handysize Vessels | Agreement To Exchange Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,647 |  |  |
Number of vessels to be exchanged | item |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |
Adjusted total fair market value of vessels |  |  |  |  |  | $ 46,000 |  |  |  |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Baltic Panther |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,285 |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,713 |  |  |
Sale of assets |  |  |  |  |  |  |  |  | $ 7,510 |  |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |
Genco Loire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,497 |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,408 |  |  |
Sale of assets |  |  |  |  |  |  |  |  |  | $ 7,650 |  |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |
Genco Lorraine, Baltic Cougar and Baltic Leopard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number impaired vessel assets | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,963 |  |  |
Baltic Jaguar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,081 |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,140 |  |  |
Sale of assets |  |  |  |  |  |  |  |  |  |  | $ 7,300 |  |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |
Genco Normandy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted net sales price of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,733 |  |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,679 |  |  |
Sale of assets |  |  |  |  |  |  |  |  |  |  |  | $ 5,850 |  |  |  |  |  |
Broker commission (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |
Genco Picardy, Genco Predator, Genco Provence and Genco Warrior |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number impaired vessel assets | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,055 |  |  |
Baltic Hare, Baltic Fox, Baltic Wind, Baltic Cove, Baltic Breeze, Genco Ocean, Genco Bay, Genco Avra, Genco Mare and Genco Spirit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels to be disposed | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10
Impairment of vessel assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 85,768 |  |  |
Baltic Wind, Baltic Breeze and Genco Bay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels to be disposed | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |

X
- Definition Represents the adjusted total fair market value of vessel. + References No definition available. + Details
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Balance Type: | debit
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- Definition Represents brokerage commission payable in percentage to the third party. + References No definition available. + Details
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Balance Type: | na
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- Definition The fleet utilization percentage used to determine undiscounted cash flows. + References No definition available. + Details
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- Definition Period of historical one-year time charter average used to determine undiscounted future net cash flows. + References No definition available. + Details
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- Definition Adjusted net sales price of vessel. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Number of vessels determined to be impaired. + References No definition available. + Details
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- Definition Number of vessels to be exchanged. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The number of vessels to be disposed. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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- Definition Period of time charter average used to determine undiscounted future net cash flows. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
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- Definition Amount of write-down of vessel assets, including but not limited to, assets to be disposed of and held-for-use. + References No definition available. + Details
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- Definition Represents the estimated scrap value of vessels. + References No definition available. + Details
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Period Type: | duration

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Balance Type: | na
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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