Represents brokerage commission payable in percentage to the third party.

No definition available.

Name:	gnk_BrokerageCommission
Namespace Prefix:	gnk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the sale price of vessel.

+ References

No definition available.

+ Details

Name:	gnk_SalePriceOfVessel
Namespace Prefix:	gnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the line items for significant accounting policies schedule.

+ References

No definition available.

+ Details

Name:	gnk_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	gnk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of write-down of vessel assets, including but not limited to, assets to be disposed of and held-for-use.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=gnk_GencoHadrianMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of vessel assets (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 16, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Summary of Significant Accounting Policies
Impairment of vessel assets		$ 5,634	$ 0	$ 5,634	$ 0
Genco Hadrian
Summary of Significant Accounting Policies
Net sales price of vessel		24,500		24,500
Impairment of vessel assets		$ 5,634		$ 5,634
Genco Hadrian \| Subsequent Event
Summary of Significant Accounting Policies
Sale of assets	$ 25,000
Broker commission (as a percent)	2.00%