Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 05, 2020
Cover page.
Entity Registrant Name	GENCO SHIPPING & TRADING LIMITED
Entity Central Index Key	0001326200
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-33393
Document Period End Date	Jun. 30, 2020
Entity Incorporation, State or Country Code	1T
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
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	GNK
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,801,753
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false