VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 2,453	$ 1,523	$ 1,306
Charged to Costs and Expenses	1,538	1,989	1,053
Removal of Uncollectible Receivables	(1,795)	(924)	(830)
Translation Adjustments Increase (Decrease)	(317)	(135)	(6)
Balance at the End of Period	1,879	2,453	1,523
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	19,032	248,867	247,967
Charged to Costs and Expenses	49,447	(230,358)	6,605
Other	0	4,108	(6,032)
Translation Adjustments Increase (Decrease)	0	(3,585)	327
Balance at the End of Period	$ 68,479	$ 19,032	$ 248,867