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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands			6 Months Ended	12 Months Ended
	Jan. 17, 2020 item	Dec. 21, 2018 item	Dec. 31, 2018 USD ($) item	Dec. 31, 2019 USD ($) item	Feb. 28, 2019 USD ($)
Purchase commitment
Vessel assets			$ 1,344,870	$ 1,273,861
Secured Debt | $495 Million Credit Facility
Purchase commitment
Maximum borrowing capacity			$ 495,000	495,000	$ 495,000
Purchase Agreements for BWTS
Purchase commitment
Number of vessels to receive ballast water treatments systems | item			42
Vessel assets			$ 1,804	$ 12,783
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
Scrubber Installation Agreements
Purchase commitment
Number of Capesize vessels to receive scrubber installations | item		17
Number of completed scrubber installations | item	1			16
Vessel assets			$ 428	$ 41,270

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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