XML 60 R48.htm IDEA: XBRL DOCUMENT v3.25.2

CASH FLOW INFORMATION - Stock-Based Compensation (Details) - 2015 Plan - USD ($) $ in Thousands					6 Months Ended
	May 20, 2025	Feb. 18, 2025	May 23, 2024	Feb. 21, 2024	Jun. 30, 2025
Restricted stock units
CASH FLOW INFORMATION
Granted (in shares)	59,136	267,344	38,122	168,411	340,038
Aggregate fair value	$ 825	$ 3,970	$ 825	$ 3,060
Performance based restricted stock units
CASH FLOW INFORMATION
Granted (in shares)		145,792		99,065	145,792
Aggregate fair value		$ 2,479		$ 2,143

X

- Definition

Represents the aggregate fair value of grants made during the period on other than stock (or unit) option plans.

+ References

No definition available.

+ Details

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

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

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PlanNameAxis=gnk_EquityIncentivePlan2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: