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LEGAL PROCEEDINGS - Claims and Complaints (Details) - complaint |  | 1 Months Ended
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May 26, 2015 | Apr. 30, 2015
LEGAL PROCEEDINGS |  |
Number of claims filed |  | 6
Number of complaints consolidated | 6 |

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- Definition Represents the number of previous filed complaints consolidated and filed. + References No definition available. + Details
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Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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