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VESSEL ACQUISITIONS AND DISPOSITIONS (Details) $ in Thousands													12 Months Ended
	May 16, 2017 USD ($)	Mar. 19, 2017 USD ($)	Feb. 16, 2017 USD ($)	Feb. 09, 2017 USD ($)	Jan. 09, 2017 USD ($)	Dec. 12, 2016 USD ($)	Nov. 04, 2016 USD ($)	Oct. 26, 2016 USD ($)	Oct. 21, 2016 USD ($)	Oct. 20, 2016 USD ($)	May 17, 2016 USD ($)	Dec. 30, 2014 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Nov. 10, 2016 USD ($)	Jul. 14, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 13, 2013 USD ($) item	Aug. 12, 2010 USD ($)
Baltic Trading Limited
VESSEL ACQUISITIONS
Capitalized interest associated with new building contracts													$ 0	$ 0	$ 372
Baltic Trading Limited | Baltic Wasp
VESSEL ACQUISITIONS
Final payment for vessel												$ 19,645
Yangfan Group Co., LTD | Agreement to Purchase Ultramax Drybulk Vessels | Baltic Trading Limited
VESSEL ACQUISITIONS
Number of vessels committed to be acquired under purchase agreement | item																			2
Purchase price per vessel																			$ 28,000
Capacity of Vessels in Deadweight Tonnage | item																			64,000
Yangfan Group Co., LTD | Agreement to Purchase Ultramax Drybulk Vessels | Baltic Trading Limited | Maximum
VESSEL ACQUISITIONS
Number of vessels committed to be acquired under purchase agreement | item																			4
Aggregate purchase price for vessels																			$ 112,000
Number of vessels purchased under option to be acquired per purchase agreement | item																			2
Line of Credit Facility | $148 Million Credit Facility
VESSEL ACQUISITIONS
Face amount of term loan facility													148,000	148,000	148,000		$ 148,000	$ 148,000
Secured Debt | $100 Million Term Loan Facility
VESSEL ACQUISITIONS
Repayment of secured debt													0	60,099	7,692
Face amount of term loan facility														100,000	100,000					$ 100,000
Secured Debt | $400 Million Credit Facility
VESSEL ACQUISITIONS
Repayment of secured debt													400	0	$ 0
Face amount of term loan facility													$ 400,000	$ 400,000		$ 400,000
Genco Prosperity
VESSEL ACQUISITIONS
Sale of assets	$ 3,050
Broker commission (as a percent)	3.50%
Genco Success
VESSEL ACQUISITIONS
Sale of assets		$ 2,800
Broker commission (as a percent)		3.00%
Genco Carrier
VESSEL ACQUISITIONS
Sale of assets			$ 3,560
Brokerage commission			$ 92
Genco Reliance
VESSEL ACQUISITIONS
Sale of assets				$ 3,500
Broker commission (as a percent)				3.50%
Genco Wisdom
VESSEL ACQUISITIONS
Sale of assets					$ 3,250
Broker commission (as a percent)					3.50%
Genco Acheron
VESSEL ACQUISITIONS
Sale of assets						$ 3,480
Broker commission (as a percent)						5.50%
Genco Leader
VESSEL ACQUISITIONS
Sale of assets							$ 3,470
Broker commission (as a percent)							3.00%
Genco Leader | Line of Credit Facility | $148 Million Credit Facility
VESSEL ACQUISITIONS
Repayment of secured debt							$ 3,366
Face amount of term loan facility							$ 148,000
Genco Pioneer
VESSEL ACQUISITIONS
Sale of assets								$ 2,650
Broker commission (as a percent)								5.50%
Genco Pioneer | Line of Credit Facility | $148 Million Credit Facility
VESSEL ACQUISITIONS
Repayment of secured debt								$ 2,504
Face amount of term loan facility								$ 148,000
Genco Sugar
VESSEL ACQUISITIONS
Sale of assets										$ 2,450
Broker commission (as a percent)										5.50%
Genco Sugar | Secured Debt | $100 Million Term Loan Facility
VESSEL ACQUISITIONS
Repayment of secured debt									$ 2,315
Face amount of term loan facility									$ 100,000
Genco Marine
VESSEL ACQUISITIONS
Sale of assets											$ 2,187
Broker commission (as a percent)											2.00%

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