INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of year	$ 1,738	$ 2,064	$ 2,537
Additions to current year tax positions	1,457	0	0
Additions to prior year tax positions	2,031	0	0
Settlements	(231)	(533)	(217)
Foreign currency translation	126	207	(256)
Unrecognized tax benefits at end of year	$ 5,121	$ 1,738	$ 2,064