| Document and Entity Information | Apr. 19, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 19, 2021 |
| Entity Registrant Name | GENCO SHIPPING & TRADING LIMITED |
| Entity Incorporation, State or Country Code | 1T |
| Entity File Number | 001-33393 |
| Entity Tax Identification Number | 98-0439758 |
| Entity Address, Address Line One | 299 Park Avenue |
| Entity Address, Address Line Two | 12th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10171 |
| City Area Code | 646 |
| Local Phone Number | 443-8550 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001326200 |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | GNK |
| Security Exchange Name | NYSE |
