SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels held for sale (Details) $ in Thousands	3 Months Ended
Jun. 30, 2024 USD ($)
Genco Claudius And Genco Maximus \| Forecast
Vessels, net
Vessel deposits retained due to termination of agreement	$ 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