CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands	Common Stock	Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2014	$ 333	$ 809,477	$ (292,990)	$ 329	$ 517,149
Increase (Decrease) in Shareholders' Equity
Net (loss) / Income			129,569		129,569
Issuance of 31,465,989 shares of common stock to acquire 2015 Acquired VLCC Newbuildings	314	464,282			464,596
Issuance of 483,970 shares of common stock for share purchase commitment	5	6,035			6,040
Issuance of common stock	150	189,657			189,807
Issuance of 574,546, 278,483 and 278,480 shares of common stock for vested 2015, 2016 and 2017 restricted stock units	6	(6)
Issuance of 1,882,223 shares of common stock for exercise of over-allotment option	19	24,619			24,638
Foreign currency translation adjustments				338	338
Stock-based compensation		12,243			12,243
Issuance of 2015 warrants		3,381			3,381
Balance at Dec. 31, 2015	827	1,509,688	(163,421)	667	1,347,761
Increase (Decrease) in Shareholders' Equity
Net (loss) / Income			67,306		67,306
Issuance of common stock		26			26
Issuance of 574,546, 278,483 and 278,480 shares of common stock for vested 2015, 2016 and 2017 restricted stock units	3	(3)
Amount recognized in other comprehensive (loss) income on derivative				14,642	14,642
Amount reclassified from AOCI to net (loss) / income on derivative				2,692	2,692
Gain on liquidation of foreign subsidiaries included in net income				(730)	(730)
Foreign currency translation adjustments				63	63
Stock-based compensation		5,651			5,651
Balance at Dec. 31, 2016	830	1,515,362	(96,115)	17,334	1,437,411
Increase (Decrease) in Shareholders' Equity
Net (loss) / Income			(168,541)		(168,541)
Issuance of 574,546, 278,483 and 278,480 shares of common stock for vested 2015, 2016 and 2017 restricted stock units	3	(3)
Amount recognized in other comprehensive (loss) income on derivative				(152)	(152)
Amount reclassified from AOCI to net (loss) / income on derivative				1,403	1,403
Stock-based compensation		4,205			4,205
Balance at Dec. 31, 2017	$ 833	$ 1,519,564	$ (264,656)	$ 18,585	$ 1,274,326