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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2018 USD ($) item	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Purchase commitment
Vessel assets		$ 924,468	$ 919,114
Purchase Agreements for BWTS
Purchase commitment
Number of vessels to receive ballast water treatments systems | item	36
Vessel assets		$ 17,774	$ 17,009
Purchase Agreement of BWTS for Capesize Vessels
Purchase commitment
BWTS purchase price	$ 900
Purchase Agreement of BWTS for Supramax Vessels
Purchase commitment
BWTS purchase price	600
Purchase Agreement of BWTS for Handysize Vessels
Purchase commitment
BWTS purchase price	$ 500

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Number of vessels to receive ballast water treatments systems.

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- Definition

Long lived, depreciable assets used for the primary purpose of water transportation, net of accumulated depreciation.

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