DELIVERY AND DISPOSAL OF VESSELS (Details) - USD ($) $ in Thousands						12 Months Ended
	Dec. 05, 2016	Aug. 08, 2016	Jul. 22, 2016	Dec. 30, 2015	Jun. 24, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
DELIVERY OF VESSELS
Proceeds from sale of vessels						$ 86,897		$ 22,703
Loss on disposal of vessels, net						24,169	$ 805	8,729
Korean Export Credit Facility | Gener8 Apollo | Gener8 Apollo LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						60,819
Korean Export Credit Facility | Gener8 Ares | Gener8 Ares LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						61,128
Korean Export Credit Facility | Gener8 Hera | Gener8 Hera LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						60,511
Korean Export Credit Facility | Gener8 Nautilus | Gener8 Nautilus LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						59,739
Korean Export Credit Facility | Gener8 Constantine | Gener8 Constantine LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						57,423
Korean Export Credit Facility | Gener8 Macedon | Gener8 Macedon LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						53,101
Korean Export Credit Facility | Gener8 Perseus | Gener8 Perseus LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						53,410
Korean Export Credit Facility | Gener8 Oceanus | Gener8 Oceanus LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						53,410
Korean Export Credit Facility | Gener8 Noble | Gener8 Noble
DELIVERY OF VESSELS
Borrowings under term loan facilities						52,484
Korean Export Credit Facility | Gener8 Theseus | Gener8 Theseus
DELIVERY OF VESSELS
Borrowings under term loan facilities						52,175
Amended Sinosure Credit Facility | Gener8 Supreme | Gener8 Supreme LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						62,563
Amended Sinosure Credit Facility | Gener8 Success | Gener8 Success LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						59,881
Amended Sinosure Credit Facility | Gener8 Andriotis | Gener8 Andriotis LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						60,450
Amended Sinosure Credit Facility | Gener8 Chiotis | Gener8 Chiotis LLC
DELIVERY OF VESSELS
Borrowings under term loan facilities						54,600
Amended Sinosure Credit Facility | Gener8 Miltiades | Gener8 Miltiades
DELIVERY OF VESSELS
Borrowings under term loan facilities						$ 53,300
Refinancing Facility | Gener8 Spyridon
DELIVERY OF VESSELS
Proceeds from sale of vessels	$ 13,900
Loss on disposal of vessels, net	7,100
Repayments of debt	$ 11,700
Refinancing Facility | Genmar Vision
DELIVERY OF VESSELS
Proceeds from sale of vessels			$ 28,000
Loss on disposal of vessels, net			3,200
Repayments of debt			$ 19,400
Refinancing Facility | Genmar Victory
DELIVERY OF VESSELS
Proceeds from sale of vessels		$ 29,000
Loss on disposal of vessels, net		7,300
Repayments of debt		$ 19,400
Refinancing Facility | Gener8 Consul
DELIVERY OF VESSELS
Proceeds from sale of vessels				$ 17,500
Loss on impairment of vessels held for sale							$ 500
Refinancing Facility | Gener8 Hope
DELIVERY OF VESSELS
Proceeds from sale of vessels					$ 15,000
Loss on disposal of vessels, net								$ 6,300