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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2014	Jul. 09, 2014 Predecessor	Sep. 30, 2013 Predecessor	Jul. 09, 2014 Predecessor	Sep. 30, 2013 Predecessor	Sep. 30, 2014 Baltic Trading Limited	Dec. 31, 2013 Baltic Trading Limited Predecessor
Noncontrolling interest
Net (loss) income attributable to noncontrolling interest	$ (4,272)	$ (568)	$ (1,942)	$ (8,734)	$ (9,300)
Economic interest held by noncontrolling interest (as a percent)						88.96%	88.95%
Voting power (as a percent)						34.94%	34.92%

X

- Definition

Represents the voting interest held by noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	gnk_
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X

- Details

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Data Type:	xbrli:stringItemType
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X

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

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