FAIR VALUE MEASUREMENTS (Unobservable Level 3 Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		$ 0	$ 3,883	$ 9,793
Cash payments			(3,829)	(5,825)
Change in estimates included in earnings			0	153
Change due to foreign exchange rate changes			(54)	(238)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ 0		0	3,883
Fair Value Measurements, Significant Assumptions		0.02
Impairment of goodwill	$ 34,800	$ 15,369	34,818	0
Impairment of intangible assets		$ 9,252	$ 0	$ 0