INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of year	$ 5,121	$ 1,738	$ 2,064
Additions to current year tax positions	0	1,457	0
Reductions to prior year tax positions	(625)
Additions to prior year tax positions		2,031	0
Expirations	(1,115)	(231)	(533)
Foreign currency translation	(222)	126	207
Unrecognized tax benefits at end of year	$ 3,159	$ 5,121	$ 1,738