GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Roll Forward]
Balance at beginning of period	$ 187,591
Translation adjustment	0
Balance at end of period	187,591
Other Intangibles Assets [Roll Forward]
Balance at beginning of period	94,831
Translation adjustment	1,157
Amortization	(12,943)	$ (13,557)
Balance at end of period	83,045
Total Goodwill and Intangible Assets [Roll Forward]
Balance at beginning of period	282,422
Translation adjustment	1,157
Amortization	(12,943)	$ (13,557)
Balance at end of period	$ 270,636