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VESSEL ACQUISITIONS AND DISPOSITIONS (Details) $ in Thousands						3 Months Ended
	May 16, 2017 USD ($)	Mar. 19, 2017 USD ($)	Feb. 16, 2017 USD ($)	Feb. 09, 2017 USD ($)	Jan. 09, 2017 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 06, 2018 USD ($) item
VESSEL ACQUISITIONS
Deposits on vessels							$ 885
Agreement To Purchase Ultramax And Capesize Vessels
VESSEL ACQUISITIONS
Number of vessels committed to be acquired under purchase agreement | item								4
Aggregate purchase price for vessels								$ 141,000
Agreement to Purchase Capesize Drybulk Vessels
VESSEL ACQUISITIONS
Number of vessels committed to be acquired under purchase agreement | item								2
Agreement To Purchase Ultramax Drybulk Vessels
VESSEL ACQUISITIONS
Number of vessels committed to be acquired under purchase agreement | item								2
Genco Explorer and Genco Progress | Forecast
VESSEL ACQUISITIONS
Sale of assets						$ 5,600
Broker commission (as a percent)						3.00%
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%

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- Definition

Represents the aggregate purchase price for vessels per agreement.

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- Definition

Represents the number of vessels committed to be acquired by the entity under purchase agreement.

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- Definition

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer.

+ 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 210.5-02.17)
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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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