INCOME TAXES Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		$ 53	$ 51
Balance at December 31, 2015	$ 109,481
Balance at December 31, 2016	110,920	109,481
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Balance at December 31, 2015	109,481
Created during the period	15,738
Released due to changes in future profitability	(7,356)
Utilized	(2,519)
Foreign exchange	(4,674)
Balance at December 31, 2016	110,920	$ 109,481
Valuation Allowance Deferred Tax Asset Other	250
BULGARIA | Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation Allowance, Reserve Reversal	2,700
SLOVAKIA | Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation Allowance, Reserve Reversal	$ 7,100