XML 94 R64.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2014 segment | Jul. 09, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Jul. 09, 2014 | Jul. 09, 2014 | Dec. 31, 2013 | Dec. 31, 2012
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  | 2 us-gaap_NumberOfReportableSegments |  |  |  |  |  |  |  |  |  |  |
Number of operating segments |  |  |  | 2 us-gaap_NumberOfOperatingSegments |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  | $ 98,817 us-gaap_CargoAndFreightRevenue |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  | 1,584 us-gaap_SalesRevenueServicesNet |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  | 36,714 us-gaap_DepreciationDepletionAndAmortization |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  | 7,620 us-gaap_InterestExpense |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income | (190,795)us-gaap_ProfitLoss | (22,562)us-gaap_ProfitLoss | (213,358)us-gaap_ProfitLoss |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets | 1,752,913 us-gaap_Assets |  | 1,752,913 us-gaap_Assets | 1,752,913 us-gaap_Assets |  |  |  |  |  |  |  |  |  |  |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  | 24,473 gnk_ExpenditureForVessels |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  | 98,817 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  | 2,309 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  | 36,716 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  | 7,620 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  | (212,953)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets | 1,753,338 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 1,753,338 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 1,753,338 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  | 24,753 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  |  |  |  |  |  |  |  |  |  |  |
Intersegment Elimination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  | (2,309)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  | (2)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  | 405 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets | (425)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  | (425)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | (425)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |  |  |  |  |  |  |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  | (280)gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |  |  |  |  |  |  |  |
Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  | 118,759 us-gaap_CargoAndFreightRevenue / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 118,759 us-gaap_CargoAndFreightRevenue / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 224,179 us-gaap_CargoAndFreightRevenue / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 223,159 us-gaap_CargoAndFreightRevenue / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  |  |  |  |  |  |  |  |  |  |  | 1,701 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3,285 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3,294 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 75,952 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 140,743 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 139,063 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 41,061 us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 88,216 us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 87,558 us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  |  |  | 892,351 us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (65,557)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (42,238)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (19,155)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (36,976)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (48,940)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (51,950)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  | 784,557 us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (157,021)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (157,776)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets |  |  |  |  |  |  |  | 2,957,254 us-gaap_Assets / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | 2,957,254 us-gaap_Assets / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  | 29,995 gnk_ExpenditureForVessels / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 145,350 gnk_ExpenditureForVessels / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,155 gnk_ExpenditureForVessels / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  | 118,759 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  | 224,179 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 223,159 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  |  |  |  |  |  |  |  |  |  |  | 2,156 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4,571 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2,816 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 76,066 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 140,908 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 139,219 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 41,061 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 88,216 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 87,558 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  | 784,697 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (155,446)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (156,565)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets |  |  |  |  |  |  |  | 2,962,178 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | 2,962,178 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  | 29,995 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 146,790 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,155 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | Intersegment Elimination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  |  |  |  |  |  |  |  |  |  |  | (2,156)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (4,571)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (2,816)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | (114)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (165)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (156)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  | 140 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,575 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,211 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets |  |  |  |  |  |  |  | (4,924)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | (4,924)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,440)gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
GS&T | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  | 77,885 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  | 2,309 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  | 28,922 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  | 4,791 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  | (177,921)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets | 1,270,923 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  | 1,270,923 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember | 1,270,923 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  | 831 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember |  |  |  |  |  |  |  |  |  |  |  |
GS&T | Predecessor | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  | 94,171 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  | 188,206 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 195,855 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue earned |  |  |  |  |  |  |  |  |  |  |  |  | 2,156 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4,571 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2,816 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 65,237 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 125,344 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 124,405 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 37,998 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 83,761 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 83,306 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  | 878,127 us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (144,054)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (139,295)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets |  |  |  |  |  |  |  | 2,404,811 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | 2,404,811 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  | 1,043 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 192 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,155 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_GencoShippingAndTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Baltic Trading |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase fee capitalized as part of vessel assets (as a percent) |  |  |  | 100.00%gnk_PercentageOfPurchaseFeePaidToParentCapitalized / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |
Baltic Trading | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  | 20,932 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  | 7,794 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  | 2,829 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  | (35,032)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets | 482,415 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  | 482,415 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember | 482,415 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  | 23,922 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading | Predecessor | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated voyage revenue from external customers |  |  |  |  |  |  |  |  |  |  |  | 24,588 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  | 35,973 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 27,304 us-gaap_CargoAndFreightRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 10,829 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 15,564 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 14,814 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 3,063 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4,455 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4,252 us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  | (93,430)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (11,392)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (17,270)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated assets |  |  |  |  |  |  |  | 557,367 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | 557,367 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consolidated expenditures for vessels |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,952 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 146,598 gnk_ExpenditureForVessels / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |

X
- Definition Represents the amount of capitalized expenditures incurred for vessels acquired, including deposits. + References No definition available. + Details
Name: | gnk_ExpenditureForVessels
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | gnk_ExpenditureForVesselsAbstract
Namespace Prefix: | gnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of purchase fee paid to parent which is capitalized as part of cost of asset and associated depreciation expense is eliminated upon consolidation. + References No definition available. + Details
Name: | gnk_PercentageOfPurchaseFeePaidToParentCapitalized
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Revenue from transporting cargo and freight between locations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_CargoAndFreightRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 + Details
Name: | us-gaap_InterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: 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 + Details
Name: | us-gaap_ProfitLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueServicesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gnk_BalticTradingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gnk_GencoShippingAndTradingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |