SEGMENTS INFORMATION (Physical Location and Values of Long-Lived Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 163,689	$ 165,259
Belarus
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	72,507	75,984
Ukraine
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	30,142	24,652
United States
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	16,329	15,637
Russia
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	13,686	17,980
India
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	6,349	7,443
Poland
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	5,032	5,029
Hungary
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	4,820	5,201
Spain
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	2,685	1,106
China
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	2,556	3,036
Mexico
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	2,431	2,353
Other
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 7,152	$ 6,838