GOODWILL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in goodwill
Beginning balance	$ 18,303	$ 20,233	$ 5,782
Goodwill acquired			14,209
Acquisition adjustments		(1,223)
Effect of foreign currency translation	(546)	(707)	242
Ending balance	$ 17,757	$ 18,303	$ 20,233