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VESSEL ACQUISITIONS AND DISPOSITIONS (Details) $ in Thousands								3 Months Ended		12 Months Ended
	Nov. 02, 2021 USD ($)	Aug. 03, 2021	Jul. 06, 2021 USD ($)	Apr. 08, 2021 USD ($)	Jan. 25, 2021 USD ($)	Jan. 22, 2021 USD ($)	Dec. 17, 2020 USD ($) item	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($) item	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 02, 2021 USD ($) item	May 18, 2021 USD ($) item	Apr. 20, 2021 USD ($) item
VESSEL ACQUISITIONS
Deposits on vessels											$ 18,543
Restricted cash, current										$ 5,643	5,643
Amortization of Fair Market Value of Time Charters Acquired											4,263
Secured Debt | $450 Million Credit Facility
VESSEL ACQUISITIONS
Collateral vessel replacement period		360 days
Genco Mayflower, Genco Constellation and Genco Madeleine
VESSEL ACQUISITIONS
Number of vessels with below market time charters | item									3
Time charters acquired									$ 4,263
Amortization of Fair Market Value of Time Charters Acquired											4,263
Unamortized fair market value of time charters acquired										0	0
Agreement To Purchase Ultramax Newbuild Vessels | Genco Mary and Genco Laddey
VESSEL ACQUISITIONS
Number of vessels purchased under option to be acquired per purchase agreement | item													2
Capacity of vessels | item													61,000
Purchase price per vessel													$ 29,170
Deposits on vessels											18,543
Remaining purchase price of vessels paid								$ 40,838
Capitalized interest associated with new building contracts										5	292
Agreement To Purchase Ultramax Vessels | Genco Mayflower and Genco Constellation
VESSEL ACQUISITIONS
Number of vessels purchased under option to be acquired per purchase agreement | item												2
Capacity of vessels | item												63,000
Purchase price per vessel												$ 24,563
Agreement To Purchase Ultramax Vessels | Genco Madeleine
VESSEL ACQUISITIONS
Number of vessels purchased under option to be acquired per purchase agreement | item												1
Capacity of vessels | item												63,000
Purchase price per vessel												$ 21,875
Agreement To Purchase Ultramax Vessels | Genco Enterprise
VESSEL ACQUISITIONS
Capacity of vessels | item														64,000
Purchase price per vessel														$ 20,200
Ultramax Vessels | Agreement To Exchange Vessels
VESSEL ACQUISITIONS
Number of vessels to be exchanged | item							3
Handysize Vessels | Agreement To Exchange Vessels
VESSEL ACQUISITIONS
Number of vessels to be exchanged | item							6
Adjusted total fair market value of vessels							$ 46,000
Broker commission (as a percent)							1.00%
Baltic Leopard
VESSEL ACQUISITIONS
Sale of assets				$ 8,000	$ 8,000
Broker commission (as a percent)				2.00%	2.00%
Genco Lorraine
VESSEL ACQUISITIONS
Sale of assets			$ 7,950			$ 7,950
Broker commission (as a percent)			2.50%			2.50%
Genco Provence
VESSEL ACQUISITIONS
Sale of assets	$ 13,250
Broker commission (as a percent)	2.50%
Genco Provence | Secured Debt | $450 Million Credit Facility
VESSEL ACQUISITIONS
Restricted Cash, Current										$ 5,643	$ 5,643
Period for which sales proceeds from vessels will remain as restricted cash	360 days
Collateral vessel replacement period	360 days

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