BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - DEFERRED COSTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
DEFERRED DRYDOCKING, NET
Deferred drydock, amortization	$ 7,200	$ 5,100	$ 2,800
Deferred drydock, accumulated amortization	13,900	8,800
DEFERRED FINANCING COSTS, NET
Deferred financing costs, amortization	11,792	3,294	$ 737
Gener8 Consul
DEFERRED DRYDOCKING, NET
Write-off of assets held for sale		$ 400
Gener8 Ulysses
DEFERRED DRYDOCKING, NET
Write-off of assets held for sale	$ 1,000
Minimum
DEFERRED DRYDOCKING, NET
Dry-docking period	30 months
Maximum
DEFERRED DRYDOCKING, NET
Dry-docking period	60 months