GOODWILL AND OTHER INTANGIBLE ASSETS, Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, gross beginning of period	$ 148,768	$ 146,542
Accumulated impairment charges, beginning of period	(128,591)	(128,591)
Goodwill, net beginning of period	20,177	17,951
Goodwill allocation related to acquisition	1,290
Foreign currency translation	(1,650)	2,226
Goodwill, gross end of period	148,408	148,768
Accumulated impairment charges, end of period	(128,591)	(128,591)
Goodwill, net end of period	19,817	20,177
North America [Member]
Goodwill [Roll Forward]
Goodwill, gross beginning of period	63,364	63,364
Accumulated impairment charges, beginning of period	(54,474)	(54,474)
Goodwill, net beginning of period	8,890	8,890
Goodwill allocation related to acquisition	0
Foreign currency translation	0	0
Goodwill, gross end of period	63,364	63,364
Accumulated impairment charges, end of period	(54,474)	(54,474)
Goodwill, net end of period	$ 8,890	8,890
Reporting unit, percentage of fair value in excess of carrying amount	20.30%
Asia [Member]
Goodwill [Roll Forward]
Goodwill, gross beginning of period	$ 54,508	54,508
Accumulated impairment charges, beginning of period	(54,508)	(54,508)
Goodwill, net beginning of period	0	0
Goodwill allocation related to acquisition	0
Foreign currency translation	0	0
Goodwill, gross end of period	54,508	54,508
Accumulated impairment charges, end of period	(54,508)	(54,508)
Goodwill, net end of period	0	0
Europe [Member]
Goodwill [Roll Forward]
Goodwill, gross beginning of period	30,896	28,670
Accumulated impairment charges, beginning of period	(19,609)	(19,609)
Goodwill, net beginning of period	11,287	9,061
Goodwill allocation related to acquisition	1,290
Foreign currency translation	(1,650)	2,226
Goodwill, gross end of period	30,536	30,896
Accumulated impairment charges, end of period	(19,609)	(19,609)
Goodwill, net end of period	$ 10,927	$ 11,287
Reporting unit, percentage of fair value in excess of carrying amount	23.80%