XML 47 R34.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Summary of Significant Accounting Policies |
Schedule of restricted cash and cash equivalents |
|  | December 31, |  | December 31, |  | December 31, |
|  | 2017 |  | 2016 |  | 2015 |
Cash and cash equivalents |  | $ | 174,479 |  | $ | 133,400 |  | $ | 121,074 |
Restricted cash - current |  |  | 7,234 |  |  | 8,242 |  |  | 19,500 |
Restricted cash - noncurrent |  |  | 23,233 |  |  | 27,426 |  |  | 315 |
Cash, cash equivalents and restricted cash |  | $ | 204,946 |  | $ | 169,068 |  | $ | 140,889 |
Estimated Useful Lives of Fixed Assets |
Summary of Significant Accounting Policies |
Schedule of estimated useful lives of fixed assets |
Description |  | Useful lives
Leasehold improvements |  | Lesser of the estimated useful life of the asset or life of the lease
Furniture, fixtures & other equipment |  | 5 years
Vessel equipment |  | 2-15 years
Computer equipment |  | 3 years

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: | gnk_PropertyPlantAndEquipmentTablesLineItems
Namespace Prefix: | gnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of reconciliation of cash and cash equivalent balances, including restricted cash balances. + References No definition available. + Details
Name: | gnk_ScheduleOfRestrictedCashAndCashEquivalentsTableTextBlock
Namespace Prefix: | gnk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | gnk_PropertyPlantAndEquipmentTablesAxis=gnk_EstimatedUsefulLivesOfFixedAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |