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VESSEL ACQUISITIONS AND DISPOSITIONS (Details) $ in Thousands |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |
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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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