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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended 24 Months Ended
Aug. 15, 2018
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
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          
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          
Income Taxes          
Combined ownership of shareholders for more than half the days of year (as a percent)   50.00% 50.00% 50.00%  
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     $ 0 $ 0  
Singapore | Genco Shipping Pte. Ltd. (GSPL) | Other income (expense)          
Income Taxes          
Income tax expense   $ 64      
Singapore | GSSM          
Income Taxes          
Federal tax rate (as a percent)         17.00%
Income tax expense   $ 350 $ 26    
Denmark | Genco Shipping A/S          
Income Taxes          
Federal tax rate (as a percent)   22.00% 22.00% 22.00%  
Denmark | Genco Shipping A/S | Other income (expense)          
Income Taxes          
Income tax expense   $ 1,209 $ 2 $ 407