ACCUMULATED OTHER COMPREHENSIVE INCOME, Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in accumulated other comprehensive income (loss) [Abstract]
Net foreign currency translation adjustment	$ (1,390)	$ (2,615)	$ (2,972)
Net change in postretirement benefit plan (see Note 10 for further information) [Abstract]
Initial adoption of new plan	(444)	0	0
Net gain arising during the period	101	242	191
Amortization of prior service credit/(cost)	57	(18)	(18)
Amortization of (gain)/loss	(10)	0	6
Total before tax	(296)	224	179
Tax	(49)	(72)	(56)
Net of tax	(345)	152	123
Other comprehensive loss	$ (1,735)	$ (2,463)	$ (2,849)