DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE Discontinued entities (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Long Lived Assets Held-for-sale [Line Items]
Discontinued Operation, Tax Effect of Discontinued Operation									$ 91		$ 1,987		$ (968)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax									(13,287)		(80,431)		(5,099)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (12,418)	$ (265)	$ 2,684	$ (3,288)	$ (60,470)	$ (1,174)	$ (11,154)	$ (7,633)	(13,287)		(80,431)		(5,099)
Discontinued Operations [Member]
Long Lived Assets Held-for-sale [Line Items]
Disposal Group, Including Discontinued Operation, Revenue									7,285		50,191		57,900
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									(1,990)		(17,893)		(4,131)
Discontinued Operation, Tax Effect of Discontinued Operation									91		1,987		(968)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax									(1,899)		(15,906)		(5,099)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax									(11,388)	[1]	(64,525)	[1]	0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									(13,287)		(80,431)		$ (5,099)
ROMANIA
Long Lived Assets Held-for-sale [Line Items]
Disposal Group, Not Discontinued Operations, Gain (Loss) on Disposal									14,600
BULGARIA
Long Lived Assets Held-for-sale [Line Items]
Disposal Group, Not Discontinued Operations, Gain (Loss) on Disposal									3,300
Discontinued Operations [Member]
Long Lived Assets Held-for-sale [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									(7,700)		$ (3,100)
Loss On Sale Due To Accumulated Losses Attributable To Noncontrolling Interest									$ 3,700

[1] (1) Amount includes realized gains / losses on completed disposal transactions in 2015 and 2014, and losses related to fair value adjustments required to measure our assets held for sale at fair value less costs to sell for businesses classified as discontinued operations in 2014. For the year ended December 31, 2015, the amount includes losses related to the reclassification of the cumulative translation adjustment into net income of US$ 7.7 million and the reclassification of accumulated losses attributable to noncontrolling interest of US$ 3.7 million. For the year ended December 31, 2014, the amount includes losses related to the reclassification of the cumulative translation adjustment into net income of US$ 3.1 million.