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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 |

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