XML 68 R63.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

DEBT - $495 Million Credit Facility (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2019 USD ($) | Nov. 15, 2019 USD ($) | Nov. 05, 2019 USD ($) | Sep. 23, 2019 USD ($) | Aug. 28, 2019 USD ($) | Jul. 05, 2019 USD ($) | May 10, 2019 USD ($) | Apr. 15, 2019 USD ($) | Feb. 28, 2019 USD ($) item | Feb. 13, 2019 | Jun. 05, 2018 USD ($) | May 31, 2018 USD ($) item | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  |  |  | $ 495,824 | $ 551,420 |
Secured Debt | $495 Million Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 495,000 |  |  |  | 495,000 | 495,000 |
Debt covenant to pay dividends or repurchase stock - Total cash and cash equivalents to total indebtedness (as a percent) |  |  | 18.75% |  |  |  |  |  |  |  |  |  |  |  |
Number of oldest vessels identified for sale for which debt will be paid down | item |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |
Remaining borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | 12,525 |  |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  |  |  | 21,500 | 460,000 |
Repayment of secured debt |  |  |  |  |  |  |  |  |  |  |  |  | 70,776 | 15,000 | $ 0
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  | 384,082 | 430,577 |
Percentage limit of consolidated net income for which dividends can be paid |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Collateral vessel replacement period |  |  |  |  |  |  |  |  |  |  |  | 120 days |  |  |
Collateral vessel replacement extension period |  |  |  |  |  |  |  |  |  | 180 days |  |  |  |  |
Key covenant - Unrestricted cash and cash equivalents minimum |  |  |  |  |  |  |  |  |  |  |  | $ 30,000 |  |  |
Key covenant – Percentage of unrestricted cash to total indebtedness |  |  |  |  |  |  |  |  |  |  |  | 7.50% |  |  |
Minimum restricted cash required |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Minimum working capital required |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Maximum total indebtedness to total capitalization (as a ratio) |  |  |  |  |  |  |  |  |  |  |  | 0.70 |  |  |
Key covenant – Minimum time charters period |  |  |  |  |  |  |  |  |  |  |  | 24 months |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |  |  |  |  |  | 63,427 |  |
2021 |  |  |  |  |  |  |  |  |  |  |  |  | 63,427 |  |
2022 |  |  |  |  |  |  |  |  |  |  |  |  | 63,427 |  |
2023 |  |  |  |  |  |  |  |  |  |  |  |  | 205,443 |  |
Total debt |  |  |  |  |  |  |  |  |  |  |  |  | 395,724 | $ 445,000 |
Secured Debt | $495 Million Credit Facility | Genco Champion and Genco Challenger |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel sale proceeds utilized as a loan repayment |  |  | $ 6,880 |  |  |  |  |  |  |  |  |  | $ 6,880 |  |
Collateral vessel replacement period |  | 180 days |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | $495 Million Credit Facility | Genco Cavalier |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel sale proceeds utilized as a loan repayment |  |  |  |  |  |  |  | $ 4,947 |  |  |  |  |  |  |
Secured Debt | $460 Million Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of facilities |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  | $ 460,000 |  |  |
Number of oldest vessels identified for sale for which debt will be paid down | item |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  | $ 460,000 |  |  |  |
Reference rate |  |  |  |  |  |  |  |  |  |  |  | LIBOR |  |  |
Prepayment of amortization payment before due date |  |  |  |  |  | $ 15,000 | $ 15,000 |  |  |  |  |  |  |  |
Amount of periodic payment | $ 14,321 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repaid value of loan when certain debt terms are met |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Average age of collateral vessels for repayment of loan |  |  |  |  |  |  |  |  |  |  |  | 17 years |  |  |
Secured Debt | $460 Million Credit Facility | Period after December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization payments per quarter |  |  |  |  |  |  |  |  |  |  |  | $ 15,000 |  |  |
Secured Debt | $460 Million Credit Facility | Period upon final maturity on May 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final payment amount | $ 188,049 |  |  |  |  |  |  |  |  |  |  | $ 190,000 |  |  |
Secured Debt | $460 Million Credit Facility | LIBOR | Through December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 3.25% |  |  |
Secured Debt | $35,000 Scrubber Tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 34,025 | 35,000 |  |  |  |  |  | $ 35,000 |  |  |  |  |  |
Drawdowns during the period |  |  |  | $ 12,200 | $ 9,300 |  |  |  |  |  |  |  |  |  |
Number of Capesize vessels for which the scrubber installation will be financed | item |  |  |  |  |  |  |  |  | 17 |  |  |  |  |  |
Secured Debt | $35,000 Scrubber Tranche | Period To March 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum amount required per borrowing |  |  |  |  |  |  |  |  | $ 5,000 |  |  |  |  |  |
Secured Debt | $35,000 Scrubber Tranche | Through September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |
Secured Debt | $35,000 Scrubber Tranche | Period After March 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of facilities |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |
Amount of periodic payment |  | $ 2,430 |  |  |  |  |  |  | $ 2,500 |  |  |  |  |  |
Secured Debt | Minimum | $495 Million Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant to pay dividends or repurchase stock - Total cash and cash equivalents |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 135.00% |  |  |
Secured Debt | Minimum | $460 Million Credit Facility | LIBOR | Period after December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |
Secured Debt | Minimum | $35,000 Scrubber Tranche | Period After September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  | 2.25% |  |  |  |  |  |
Secured Debt | Maximum | $495 Million Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  | 200.00% |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | Maximum | $460 Million Credit Facility | LIBOR | Period after December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 3.50% |  |  |
Secured Debt | Maximum | $35,000 Scrubber Tranche | Period To March 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of scrubber costs to be financed |  |  |  |  |  |  |  |  | 90.00% |  |  |  |  |  |
Secured Debt | Maximum | $35,000 Scrubber Tranche | Period After September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate (as a percent) |  |  |  |  |  |  |  |  | 2.75% |  |  |  |  |  |

X
- Definition Debt covenant minimum period for the collateral time charters. + References No definition available. + Details
Name: | gnk_DebtCovenantCollateralMinimumTimeChartersPeriod
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The debt covenant extension 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_DebtCovenantCollateralVesselsReplacementExtensionPeriod
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
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 Amount of minimum restricted cash required per terms of the credit facility. + References No definition available. + Details
Name: | gnk_DebtCovenantMinimumRestrictedCash
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt covenant unrestricted cash and cash equivalents minimum. + References No definition available. + Details
Name: | gnk_DebtCovenantUnrestrictedCashMinimum
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt covenant pertaining to unrestricted cash and cash equivalents to total indebtedness. + References No definition available. + Details
Name: | gnk_DebtCovenantUnrestrictedCashPercentOfIndebtedness
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the average age of collateral vessels for repayment of loan. + References No definition available. + Details
Name: | gnk_DebtInstrumentAverageAgeOfCollateralVesselsForRepaymentOfLoan
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt convent pertaining to amount of total cash and cash equivalents, in which the entity may pay dividends or repurchase of stock. + References No definition available. + Details
Name: | gnk_DebtInstrumentCovenantTotalCashAndCashEquivalents
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Debt covenant pertaining to the percentage of total cash and cash equivalents to total indebtedness, in which the entity may pay dividends or repurchase of stock. + References No definition available. + Details
Name: | gnk_DebtInstrumentCovenantTotalCashAndCashEquivalentsToTotalIndebtednessPercentage
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the aggregate fair value of the mortgaged vessels to be maintained as a percentage of aggregate outstanding principal amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of line of credit facility future amortization payments per quarter per facility agreement. Upon payment of excess cash flow to lenders, these amortization payments shall be adjusted. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityFutureAmortizationPaymentsPerQuarter
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the required payment amount under the line of credit facility due on final maturity date. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPaymentAmountDueAtMaturity
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of vessel sale proceeds utilized as a loan repayment due to replacement vessel was not added as collateral with period stipulated under credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditPrepaymentDueToReplacementVesselNotAddedAsCollateral
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the maximum ratio of total debt outstanding to total capitalization. + References No definition available. + Details
Name: | gnk_MaximumTotalDebtToTotalCapitalizationRatio
Namespace Prefix: | gnk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum amount required per borrowing. + References No definition available. + Details
Name: | gnk_MinimumAmountRequiredPerBorrowing
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum working capital required per terms of the credit facility. + References No definition available. + Details
Name: | gnk_MinimumWorkingCapital
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of Capesize vessels for which the scrubber installation will be financed. + References No definition available. + Details
Name: | gnk_NumberOfCapesizeVesselsForWhichScrubberInstallationWillBeFinanced
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of oldest vessels identified for sale, for which debt will be paid down. + References No definition available. + Details
Name: | gnk_NumberOfVesselsForDebtToPaidDown
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage limit of consolidated net income for dividends to be paid if collateral maintenance test is met. + References No definition available. + Details
Name: | gnk_PercentageLimitOfConsolidatedNetIncomeForPaymentOfDistributions
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of scrubber costs to be financed. + References No definition available. + Details
Name: | gnk_PercentageOfScrubberCostsToBeFinanced
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash outflow for prepayment of amortization payment before due date. + References No definition available. + Details
Name: | gnk_PrepaymentOfAmortizationPayment
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The value of loan when the average age of the vessels serving as collateral from time to time reaches a specified period, following an initial non-amortization period and all additional debt covenants are met. + References No definition available. + Details
Name: | gnk_ValueOfLoanWhenAverageAgeOfCollateralVesselsReachSpecifiedPeriod
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix: | us-gaap_
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_LineOfCreditFacilityLineItems
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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the required periodic payments of both interest and principal. + 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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LongTermDebtByMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_LongLivedAssetsHeldForSaleByAssetTypeAxis=gnk_GencoChampionAndGencoChallengerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=gnk_GencoCavalierMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gnk_NordeaBankSeniorSecuredCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodAfterDecember312018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodUponFinalMaturityOnMay312023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodThroughDecember312018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gnk_NordeaBankSeniorSecuredCreditFacilityTrancheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodToMarch302020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodThroughSeptember302019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodAfterMarch312020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=gnk_PeriodAfterSeptember302019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |