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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sale of Vessels (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gain on sale of vessels
(Loss) gain on sale of vessels	$ (1,855)	$ (168)	$ 3,513
Genco Charger, Genco Thunder, Baltic Wind, Baltic Breeze, Genco Bay, Baltic Jaguar, Genco Loire, Genco Normandy and Genco Ocean [Member]
Gain on sale of vessels
(Loss) gain on sale of vessels	$ (1,855)
Genco Challenger, Genco Champion and Genco Raptor
Gain on sale of vessels
(Loss) gain on sale of vessels		$ (168)
Genco Progress, Genco Cavalier, Genco Explorer, Genco Muse, Genco Beauty and Genco Knight
Gain on sale of vessels
(Loss) gain on sale of vessels			$ 3,513

X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

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- References

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