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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Taxes (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 15, 2018	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Gross transportation tax		$ 0	$ 0	$ 0
Ownership percentage held by each shareholder (as a percent)		5.00%	5.00%	5.00%
Federal tax rate (as a percent)		21.00%
Tax rate on 50% of shipping income if not qualified for Section 883		4.00%
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 attributable to transportation that begins or ends in the United States included in United States source shipping income		50.00%
Percentage of shipping income sourced to United States if no transportation is attributable to United States		0.00%
Minimum [Member]
Income Taxes
Combined ownership held by 5% shareholders (as a percent)		50.00%
Percentage of value of outstanding shares owned by the qualified shareholders of a foreign corporation		50.00%
Maximum [Member]
Income Taxes
Combined ownership of shareholders for more than half the days of year (as a percent)		50.00%	50.00%	50.00%
GSSM
Income Taxes
Federal tax rate (as a percent)		17.00%	17.00%	17.00%
Income tax expense		$ 115	$ 238	$ 350
SINGAPORE | Genco Shipping Pte. Ltd. (GSPL)
Income Taxes
Federal tax rate (as a percent)		17.00%
Initial period of the Maritime Sector Incentive award	10 years
Initial performance review period of the Maritime Sector Incentive award	5 years
Income tax expense		$ 97	$ 31	$ 64
DENMARK | Genco Shipping A/S
Income Taxes
Federal tax rate (as a percent)		22.00%	22.00%	22.00%
Income tax expense		$ 33	$ 205	$ 1,209

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