OTHER NONOPERATING EXPENSE, NET (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Income and Expenses [Abstract]
Interest income	$ 108	$ 112
Foreign currency exchange gain / (loss), net	15,422	(11,489)
Change in fair value of derivatives (Note 11)	(14,050)	(1,010)
Other expense, net	(64)	(354)
Total other non-operating income / (expense)	$ 1,416	$ (12,741)