CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands	Common Stock.	Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income / (Loss)	Total
Balance at Dec. 31, 2015	$ 827	$ 1,509,688	$ (163,421)	$ 667	$ 1,347,761
Increase (Decrease) in Shareholders' Equity
Net (loss) / income			98,853		98,853
Issuance of common stock		26			26
Amount recognized in other comprehensive income (loss) on derivative				(13,948)	(13,948)
Foreign subsidiaries liquidation				(730)	(730)
Foreign currency translation adjustments				63	63
Stock-based compensation		2,855			2,855
Balance at Jun. 30, 2016	827	1,512,569	(64,568)	(13,948)	1,434,880
Balance at Dec. 31, 2016	830	1,515,362	(96,115)	17,334	1,437,411
Increase (Decrease) in Shareholders' Equity
Net (loss) / income			(55,681)		(55,681)
Amount recognized in other comprehensive income (loss) on derivative				(4,356)	(4,356)
Amount recognized in net income (loss) on derivative				909	909
Stock-based compensation		2,835			2,835
Balance at Jun. 30, 2017	$ 830	$ 1,518,197	$ (151,796)	$ 13,887	$ 1,381,118