SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels held for sale (Details) - Genco Claudius And Genco Maximus - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2024	Sep. 30, 2024
Vessels, net
Vessel deposits retained due to termination of agreement	$ 3,650
Net Gain on Sale of Vessels
Vessels, net
Vessel deposits received and recorded		$ 3,650

Represents the amount of vessel deposits retained due to termination of the agreement.

No definition available.

Name:	gnk_VesselsDepositsRetainedPerTerminationOfAgreement
Namespace Prefix:	gnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration