CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income / (loss)	$ 67,306	$ 129,569	$ (47,084)
Other comprehensive (loss) / income
Amount recognized in other comprehensive loss on derivative	14,642
Amount recognized in net income / (loss) on derivative	2,692
Gain on liquidation of foreign subsidiaries included in net income	(730)
Foreign currency translation adjustments	63	338	190
Comprehensive income / (loss)	$ 83,973	$ 129,907	$ (46,894)