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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (Baltic Trading Limited) | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Baltic Trading Limited |  |
Noncontrolling interest |  |
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_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant