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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long-lived assets (Details) $ in Thousands							12 Months Ended
	Dec. 21, 2023 USD ($)	Nov. 14, 2023 USD ($)	Jan. 01, 2022 $ / item	Jul. 06, 2021 USD ($)	Apr. 08, 2021 USD ($)	Dec. 17, 2020 USD ($) item	Dec. 31, 2023 USD ($) $ / item	Dec. 31, 2021 $ / item	Sep. 30, 2023 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							$ 41,719
Genco Lorraine
Impairment of long-lived assets
Sale of assets				$ 7,950
Broker commission (as a percent)				2.50%
Baltic Leopard
Impairment of long-lived assets
Sale of assets					$ 8,000
Broker commission (as a percent)					2.00%
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
Number of vessels to be exchanged | item						6
Adjusted total fair market value of vessels						$ 46,000
Broker commission (as a percent)						1.00%
Genco Claudius, Genco Commodus and Genco Maximus
Impairment of long-lived assets
Number impaired vessel assets | item									3
Impairment of vessel assets							13,617
Genco Claudius, Genco Commodus and Genco Maximus | Agreement to sell Genco Claudius, Genco Commodus and Genco Maximus
Impairment of long-lived assets
Impairment of vessel assets							28,102
Genco Maximus
Impairment of long-lived assets
Sale of assets	$ 18,000
Broker commission (as a percent)	1.00%
Net sales price of vessel							17,820
Genco Claudius
Impairment of long-lived assets
Sale of assets	$ 18,500
Broker commission (as a percent)	1.00%
Net sales price of vessel							18,315
Genco Commodus
Impairment of long-lived assets
Sale of assets		$ 19,500
Broker commission (as a percent)		1.00%
Net sales price of vessel							$ 19,305

X

- Definition

Represents the adjusted total fair market value of vessel.

+ References

No definition available.

+ Details

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- Definition

Represents brokerage commission payable in percentage to the third party.

+ References

No definition available.

+ Details

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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

Number of vessels determined to be impaired.

+ References

No definition available.

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- Definition

Number of vessels to be exchanged.

+ References

No definition available.

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- Definition

Represents the sale price of vessel.

+ References

No definition available.

+ Details

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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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- 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.

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- Definition

Represents the estimated useful life of vessels.

+ References

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- References

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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
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

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