CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
VOYAGE REVENUES:
Navig8 pools revenues	$ 368,889	$ 149,642
Time charter revenues	9,278	28,707	$ 10,894
Spot charter revenues	26,455	251,584	381,515
Total voyage revenues	404,622	429,933	392,409
OPERATING EXPENSES:
Voyage expenses	12,490	95,306	239,906
Direct vessel operating expenses	107,308	85,521	84,209
Navig8 charterhire expenses	3,059	11,324
General and administrative	27,844	36,379	22,418
Depreciation and amortization	87,191	47,572	46,118
Goodwill impairment	23,297	0	2,099
Goodwill write-off for sales of vessels	2,994		1,249
Loss on impairment of vessels held for sale		520
Loss on disposal of vessels, net	24,169	805	8,729
Closing of Portugal office		507	5,123
Total operating expenses	288,352	277,934	409,851
OPERATING INCOME / (LOSS)	116,270	151,999	(17,442)
OTHER EXPENSES:
Interest expense, net	(49,627)	(15,982)	(29,849)
Other financing costs	(7)	(6,044)
Other income (expense), net	670	(404)	207
Total other expenses	(48,964)	(22,430)	(29,642)
NET INCOME / (LOSS)	$ 67,306	$ 129,569	$ (47,084)
INCOME / (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ 0.81	$ 2.06	$ (1.54)
Diluted (in dollars per share)	$ 0.81	$ 2.05	$ (1.54)