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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segment $ / item	Dec. 31, 2016 USD ($) item	Mar. 31, 2016 USD ($)
Segment reporting
Number of reportable segments | segment	1
Vessels, net
Estimated useful life	25 years
Depreciation and amortization	$ 18,173		$ 20,339
Estimated scrap value (in dollars per lightweight ton) | $ / item	310
Deferred revenue
Reserve against the due from charterers	$ 304	$ 283
Accrual related to estimated customer claims	524	$ 220
Number of categories of General administrative and management fees | item		2
Voyage expense recognition
Net loss on purchase and sale of bunker fuel and LCM adjustments	504		2,297
Impairment of vessel assets
Impairment of vessel assets	0		1,685
Gain on disposal of vessels
Gain on sale of vessels	6,369		0
Vessels
Vessels, net
Depreciation and amortization	16,706		19,134
Genco Marine
Impairment of vessel assets
Impairment of vessel assets			$ 1,685
Genco Wisdom, Genco Reliance, Genco Carrier, and Genco Success
Gain on disposal of vessels
Gain on sale of vessels	$ 6,369

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Represents the net gains (losses) resulting from the difference between the cost of bunker fuel delivered by the terminating charterer and the bunker fuel sold to the new charterer and the lower of cost or market adjustment to re-value bunker fuel on a quarterly basis.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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-SubTopic 10
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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
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-Section 50
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