OTHER NON-OPERATING EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investment Income, Interest	$ 440	$ 294	$ 496
Foreign Currency Transaction Gain (Loss), before Tax	(13,481)	(12,767)	20,187
Gain (Loss) on Derivative Instruments, Net, Pretax	4,848	2,311	104
Non-operating income / (expense), net	(17,746)	267	(373)
Nonoperating Income (Expense)	(25,939)	$ (9,895)	$ 20,414
BULGARIA
Disposal Group, Not Discontinued Operations, Gain (Loss) on Disposal	3,300
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 11,300