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VESSEL ACQUISITIONS AND DISPOSITIONS (Details) - USD ($) $ in Thousands	May 16, 2017	Mar. 19, 2017	Feb. 16, 2017	Feb. 09, 2017	Jan. 09, 2017
Genco Prosperity
VESSEL ACQUISITIONS
Sale of assets	$ 3,050
Broker commission (as a percent)	3.50%
Genco Success
VESSEL ACQUISITIONS
Sale of assets		$ 2,800
Broker commission (as a percent)		3.00%
Genco Carrier
VESSEL ACQUISITIONS
Sale of assets			$ 3,560
Brokerage commission			$ 92
Genco Reliance
VESSEL ACQUISITIONS
Sale of assets				$ 3,500
Broker commission (as a percent)				3.50%
Genco Wisdom
VESSEL ACQUISITIONS
Sale of assets					$ 3,250
Broker commission (as a percent)					3.50%

X

- Definition

Represents brokerage commission payable in percentage to the third party.

+ References

No definition available.

+ Details

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

X

- Definition

Represents brokerage commission payable to the third party.

+ References

No definition available.

+ Details

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Namespace Prefix:	gnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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

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Namespace Prefix:	us-gaap_
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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

+ Details

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X

- Details

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X

- Details

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Balance Type:
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X

- Details

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X

- Details

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X

- Details

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