XML 56 R45.htm IDEA: XBRL DOCUMENT v3.21.1

VESSEL ACQUISITIONS AND DISPOSITIONS (Details)					3 Months Ended		12 Months Ended
	Apr. 08, 2021 USD ($)	Dec. 17, 2020 USD ($) item	Jun. 05, 2020	Jun. 04, 2020	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($) item	Apr. 20, 2021 USD ($)
VESSEL ACQUISITIONS
Restricted cash, current						$ 40,519,000	$ 35,492,000
Secured Debt | $495 Million Credit Facility
VESSEL ACQUISITIONS
Maximum borrowing capacity						495,000,000
Restricted cash, current						$ 40,519,000	$ 35,492,000
Period for which sales proceeds from vessels will remain as restricted cash						360 days
Collateral vessel replacement period			360 days	180 days		360 days
Number of vessels sold which served as collateral | item						9	8
Secured Debt | $133 Million Credit Facility
VESSEL ACQUISITIONS
Maximum borrowing capacity						$ 133,000,000
Agreement To Exchange Vessels
VESSEL ACQUISITIONS
Adjusted total fair market value of vessels		$ 46,000,000
Broker commission (as a percent)		1.00%
Subsequent Event | Agreement to Purchase Ultramax Drybulk Vessels
VESSEL ACQUISITIONS
Aggregate purchase price for vessels								$ 20,200,000
Ultramax Vessels | Agreement To Exchange Vessels
VESSEL ACQUISITIONS
Number of vessels to be exchanged | item		3
Handysize Vessels | Agreement To Exchange Vessels
VESSEL ACQUISITIONS
Number of vessels to be exchanged | item		6
Baltic Leopard | Subsequent Event
VESSEL ACQUISITIONS
Sale of assets	$ 8,000,000
Broker commission (as a percent)	2.00%
Baltic Leopard | Subsequent Event | Secured Debt | $495 Million Credit Facility
VESSEL ACQUISITIONS
Restricted cash, current	$ 4,087,000
Period for which sales proceeds from vessels will remain as restricted cash	360 days
Collateral vessel replacement period	360 days
Genco Lorraine | Forecast
VESSEL ACQUISITIONS
Sale of assets					$ 7,950,000
Broker commission (as a percent)					2.50%

X

- Definition

Represents the adjusted total fair market value of vessel.

+ References

No definition available.

+ Details

Name:	gnk_AdjustedFairMarketValueOfVessel
Namespace Prefix:	gnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the aggregate purchase price for vessels per agreement.

+ References

No definition available.

+ Details

Name:	gnk_AggregatePurchasePriceOfVessels
Namespace Prefix:	gnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents brokerage commission payable in percentage to the third party.

+ References

No definition available.

+ Details

Name:	gnk_BrokerageCommission
Namespace Prefix:	gnk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The debt covenant period for replacement of new vessel having an equal or greater appraised value if in compliance with collateral maintenance test.

+ References

No definition available.

+ Details

Name:	gnk_DebtCovenantCollateralVesselsReplacementPeriod
Namespace Prefix:	gnk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of vessels sold, which served as collateral under a debt facility instrument.

+ References

No definition available.

+ Details

Name:	gnk_NumberOfVesselsSoldWhichServedAsCollateral
Namespace Prefix:	gnk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of vessels to be exchanged.

+ References

No definition available.

+ Details

Name:	gnk_NumberOfVesselsToBeExchanged
Namespace Prefix:	gnk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the period for which the net sale proceeds from sale of vessels will remain classified as restricted cash following the sale date if or until a replacement vessel or vessels meeting certain requirements are added as collateral under the facility.

+ References

No definition available.

+ Details

Name:	gnk_PeriodForWhichSaleProceedsFromVesselsWillRemainAsRestrictedCash
Namespace Prefix:	gnk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

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

X

- Definition

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586

+ Details

Name:	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gnk_AmendedNordeaBankSeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gnk_OneHundredAndThirtyThreeMillionDollarsCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=gnk_AgreementToExchangeVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=gnk_AgreementToPurchaseUltramaxDrybulkVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: